Download Commercial Air Conditioning SERVICE MANUAL Models

Commercial Air Conditioning
SERVICE MANUAL
Models
AU242FHBIA
AU482FIBIA
AU48NFIBJA
And its indoor units
zFeatures
zNew cassette unit, with 700*700 panel and new unit body
zNew PCB for cassette indoor unit and outdoor unit, much stabler
zMutiple indoor unit types: cassette type, ceiling concealed type, and wall
mounted type
zFree combination, total indoor capacity can be 50%~130% of outdoor capacity
zMultiple control types, infrared control+wired control
zIndividual operation for every indoor uint, energy saving
zNew refrigerant control device: MP2A, MP3A
zAuto restart function
zLong piping and high drop between indoor and outdoor
zRefrigerant: R407C
Manual code: SYJS-017-05REV.0
Edition: 2005-11-22
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
CONTENTS
Contents………………………………………………………...2
1. Description of products & features………………………..3
2. Specification…………………………………………………6
3. Safety precaution…………………………………………...14
4. Net dimension……………………………………………….16
5. Installation instructions………..……………………………21
6. Parts and functions………………………………………….53
7. Controller functions.............………………………………..21
8. Electrical control functions…………………………………71
9. Wiring diagrams…………………………………………….95
10. Failure code and troubleshooting………………………..99
11. Noise level……………………………………...................121
12. Performance curves......................................................124
-2-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
1.DESCRIPTION OF PRODUCTS & FEATURES
1.1. Products code explanation
A
B 14
2
F C
B
I
A
Climate type: T1 (see table 1)
Design number (I stands for design sequence, inverter
frequency type)
Product type: A stands for heat pump type, refrigerant is R22
B stands for heat pump type, refrigerant is R407C
M stands for cool only type, refrigerant is R22
N stands for cool only type, refrigerant is R407C
Appearance code
Product series: F stands for MRV
Applicable voltage: 2 stands for 220-230V/50Hz,
4 stands for 220V/60HzˈN stand for 380-400V/50Hz
Cooling / Heating capacity,14=14000BTU/h
Product type : “B” stands for cassette type, “C” stands for
convertible type, ”D” stands for duct, “S” stands for split
type, ”Q” stands for chiller system, "E" stands for ceiling
concealed type, “U” stands for outdoor unit
Air Conditioner
1.2 Brief Introduction for T1ǃT2ǃT3 working condition
Climate type
Type
of
Conditioner
Air
T1
T2
T3
Cooling Only
18 ć~43ć
10ć~35ć
21ć~52ć
Heat pump
-7ć~43ć
-7ć~35ć
-7ć~52ć
Electricity Heating
~43ć
~35ć
~52ć
1.3 Operating Range of Air Conditioners
Working temperature range
Cooling
Indoor
outdoor
Heating
Indoor
outdoor
Rated
Maximum
Minimum
DBć
27
32
18
WBć
19
23
14
DBć
35
43
-5
WBć
24
26
--
DBć
20
27
15
WBć
14.5
--
--
DBć
7
24
-15
WBć
6
18
--
-3-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
1.4 Product features
New designed panel 700*700 with the 600*600 cassette unit
New designed swing louver with the non smooth surface, which can hold back the condensant water.
New designed filter lock, which will fix the filter more firmly than before.
Adopts the stepping motor, give the louver a larger swing angel.
New fan with bigger diameter fan blade, sending out larger air flow.
The cassette indoor unit adopts the panel whose dimension is identical to that of ceiling, after installation,
the unit will be accordant with the decoration decor.
Free combination, total indoor capacity can be 50%~130% of that of outdoor capacity
The outdoor unit can match with all types of indoor unit with the allowable capacity, such as the cassette
type, the ceiling concealed type, the wall mounted type, etc.
Optional control types: infrared remote controller and wired controller
The unit can be controlled by the smart infrared remote controller YR-H71, which can realize many
functions such as heating, cooling, fan, swing, fresh, health, filter up/down, electric heating, etc.
Furthermore, the remote controller can be compatible with many old controllers, more convenient for
utilizing.
If the unit is with wired controller YR-E06, which can realize remote control type by adding an infrared
controller YR-H71.
Auto-check function
The unit can display the malfunction codes on the control board by using advanced auto-check
technology, convenient for user find and dwell with the abnormal running.
Auto–restart function (optional)
All indoor units have auto-restart function. When the power supply cut off suddenly, the unit will
automatically recover the previous running mode once the power supply is on.
New refrigerant control device: MP2A, MP3A
The new refrigerant control device MP2A and MP3A replace the previous device MP2 and MP3. The new
device includes gas pipe and liquid pipe, more convenient for installation than before.
-4-
Commercial Air Conditioner
Total unit:
outdoor units
appearance
model
refrigerant
AU242FHBIA
R407C
AU482FIBIA
AU48NFIBJA
R407C
appearance
model
indoor units
type
AB092FCBIA
Four way cassette
AB142FCBIA
AB182FCBIA
AE072FCBKA
AE092FCBKA
AE122FCBKA
Ceiling concealed
AE142FCBKA
AE182FCBKA
AE242FCBKA
AS072FCBHA
AS092FCBHA
Wall-mounted
(colorful screen)
AS122FCBHA
AS142FCBHA
AS182FCBHA
-5-
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
2. SPECIFICATION
AU242FHBIA
Item
Model
Function
AU242FHBIA
cooling
heating
Capacity
BTU/h
24000
27000
Capacity
W
7030
7910
Total power input
W
3200
3100
Max. power input
W
3800
3800
W/W
2.2
EER or COP
2.55
2
Power cable
6mm
NˈVˈHz
1PH,220-230V~,50Hz
A/A
cooling: 18A/21A heating: 17/21A
Start Current
A
--
Working frequency range
Hz
30-105
Fuse
A
3.15A 250V AC
Power source
Running /Max.Running current
AU242FHBIA (white)
Unit model (color)
Type
ROTARY
Type × Number
AXIAL*1
r/min
840±30/780±30/550±50
Fan motor output power
kW
60*1
Air-flow(H-M-L)
m³/h
3240
Type / Diameter
mm
inner grooved copper pipe ¶9.52
Speed
Fan
Outdoor unit
C-7RB267H03AA/ SANYO SHENYANG
Model / Manufacture
Compressor
Heat exchanger
Temp. scope
Dimension
2*1.5mm
Row*fin pintch
ć
External
˄L×W×H˅ mm×mm×mm
948X830X340
Package
˄L×W×H˅ mm×mm×mm
1050X979X440
Refrigerant control method
mm/mm
Volume of Accumulator
Noise level
L
--
dB(A)
58
--
material of reduce noise
W
30
kg / kg
74/89
g
R407C/3200
Recharge quantity
g/m
ij9.52 liquid pipe: 65g/mhactual length
Liquid
mm
¶9.52
Gas
mm
¶15.88
crankcase heater power
(Net / Shipping)
Refrigerant
PIPING
EEV
AUTO
Defrosting
Weight
--
Pipe
Type / Charge
flared
Connecting Method
Between I.D &O.D
MAX.Drop
m
outdoor upper: 30, outdoor lower: 20
MAX.Piping length
m
50
-6-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AU482FIBIA
Item
Model
Function
Capacity
Capacity
Total power input
Max. power input
EER or COP
Power cable
Power source
Running /Max.Running current
BTU/h
W
W
W
W/W
PIPING
heating
48000
61000
14000
18000
6500
6000
7500
7500
2.15
3.00
16mm
NˈVˈHz
A/A
A
Hz
A
Outdoor unit
Type / Charge
Recharge quantity
Liquid
Pipe
Gas
Connecting Method
MAX.Drop
Between I.D &O.D
MAX.Piping length
Refrigerant
cooling
2
Start Current
Working frequency range
Fuse
Unit model (color)
Model / Manufacture
Compressor
Type
Type × Number
Speed
r/min
Fan
Fan motor output power
kW
Air-flow(H-M-L)
m³/h
Type / Diameter
mm
Heat exchanger Row*fin pintch
Temp. scope
ć
External
˄L×W×H˅ mm×mm×mm
Dimension
Package
˄L×W×H˅ mm×mm×mm
Refrigerant control method
mm/mm
Defrosting
Volume of Accumulator
Noise level
material of reduce noise
crankcase heater power
Weight
(Net / Shipping)
AU482FIBIA
L
dB(A)
W
kg / kg
g
g/m
mm
mm
1PH,220-230V~,50Hz
cooling: 34A/42A heating: 30/40A
-30-105
3.15A 250V AC
AU482FIBIA (white)
EEV48FAL1/MITSUBISHI ELECTRIC
SCROLL
AXIAL*2
920±30r/min/840±40r/min/560±50r/min
65*2
7480
inner grooved copper pipe ¶9.52
2*1.5mm
43-60
1250X948X340
1375X1050X440
EEV
AUTO
-58
-40
120/135
R407C/4200
ij9.52 liquid pipe: 65g/mhactual length
¶9.52
¶19.05
flared
m
m
-7-
outdoor upper: 30, outdoor lower: 20
100
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AU48NFIBJA
Item
Model
Function
Capacity
Capacity
Total power input
Max. power input
EER or COP
AU48NFIBJA
cooling
heating
BTU/h
48000
61000
W
14000
18000
W
6000
6000
W
7000
7000
W/W
2.33
3.00
4mm2
Power cable
Power source
Running /Max.Running current
NˈVˈHz
A/A
3N~,380-400V,50Hz
cooling: 10.5A/13A heating: 10.5/13A
A
--
Working frequency range
Hz
25-95
Fuse
A
3.15A 250V AC
Start Current
AU48NFIBJA (white)
Unit model (color)
Compressor
AEV60FCHMT/MITSUBISHI ELECTRIC
Model / Manufacture
SCROLL
Type
AXIAL*2
Type × Number
Outdoor unit
Fan
Heat exchanger
r/min
920±30 r/min/840±40r/min/560±50r/min
Fan motor output power
kW
65*2
Air-flow(H-M-L)
m³/h
7480
Type / Diameter
mm
inner grooved copper pipe ¶9.52
Speed
Temp. scope
Dimension
43-60
ć
External
˄L×W×H˅ mm×mm×mm
1250X948X340
Package
˄L×W×H˅ mm×mm×mm
mm/mm
1375X1050X440
Refrigerant control method
Defrosting
EEV
AUTO
L
--
dB(A)
58
material of reduce noise
--
crankcase heater power
Weight (Net / Shipping)
Volume of Accumulator
Noise level
Refrigerant
PIPING
2*1.5mm
Row*fin pintch
Pipe
W
40
kg / kg
120/135
g
R407C/4400
Recharge quantity
g/m
ij9.52 liquid pipe: 65g/mhactual length
Liquid
mm
¶9.52
Gas
mm
¶19.05
Type / Charge
flared
Connecting Method
Between I.D &O.D
MAX.Drop
m
outdoor upper: 30, outdoor lower: 20
MAX.Piping length
m
100
-8-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Indoor:
Item
Cooling capacity
Heating capacity
Cooling capacity
Heating capacity
Dehumidifying capacity
Power source
Running current
Starting current
Refrigerant
Noise level(H/M/L)
model
Btu/h
Btu/h
W
W
10ϋ³×m³/h
NˈVˈHz
A
A
dB(A)
Type × Number
Air-flow(H-M-L)
Fan motor output
starting mothod
Fan
Heat exchanger
Refrigerant control method
Dimension(L×W×H)
External
Shipping
Panel dimension (L×W× External
H)
Shipping
Net
Weight(unit/panel)
Shipping
Liquid
Piping
Gas
Connection method
Suited area
Controller type
Item
m³/h
W
mm×mm×mm
mm×mm×mm
mm×mm×mm
mm×mm×mm
kg / kg
kg / kg
mm (inch)
mm (inch)
m2
model
Cooling capacity
Heating capacity
Cooling capacity
Heating capacity
Dehumidifying capacity
Power source
Running current
Starting current
Refrigerant
Noise level(H/M/L)
Btu/h
Btu/h
W
W
10ϋ³×m³/h
NˈVˈHz
A
A
dB(A)
Type × Number
Air-flow(H-M-L)
Fan motor output
starting mothod
Fan
m³/h
W
Heat exchanger
AB092FCBIA
AB142FCBIA
9000
12000
11000
14000
2800
3600
3200
4000
1.6
2.1
1PH 220V-230V~ 50HZ
1PH 220V-230V~ 50HZ
--1
1
R407C
R407C
42/--/-42/--/-centrifugal fan×1
centrifugal fan×1
700/--/-700/--/-55
55
PG
PG
Combination of wave cranny radiation fin and copper
Capillary + EEV
660×570×260
660×570×260
710×675×360
710×675×360
700×700×60
700×700×60
740×735×105
740×735×105
19.0/2.8
19.0/2.8
23.5/4.8
23.5/4.8
6.35 (1/4")
6.35 (1/4")
12.7 (1/2")
12.7 (1/2")
flared
flared
12~23
17~27
remote controller
AB182FCBIA
17000
19000
5000
5500
2.1
1PH 220V-230V~ 50HZ
-1
R407C
42/--/-centrifugal fan×1
700/--/-55
PG
Combination of wave
cranny radiation fin and
copper pipe
Refrigerant control method
Dimension(L×W×H)
External
mm×mm×mm
Capillary + EEV
660×570×260
Shipping
mm×mm×mm
710×675×360
External
mm×mm×mm
700×700×60
Shipping
mm×mm×mm
740×735×105
Net
kg / kg
19.0/2.8
Shipping
kg / kg
23.5/4.8
Liquid
mm (inch)
6.35 (1/4")
Gas
mm (inch)
12.7 (1/2")
m2
22~33
Panel dimension (L×W×
H)
Weight(unit/panel)
Piping
flared
Connection method
Suited area
Controller type
remote controller
-9-
Commercial Air Conditioner
Item
model
Cooling capacity
Heating capacity
Dehumidifying capacity
Power source
AE072FCBKA
Btu/h
7000
Btu/h
9000
10ϋ³×m³/h 1.2
NˈVˈHz 1PH 220V-230V 50HZ
Refrigerant
Noise level(H/M/L)
dB(A)
Type × Number
Air-flow(H-M-L) m³/h
starting mothod
Fan
Heat exchanger
Refrigerant control method
Dimension ˄L×W×H˅ External
Net
Weight
Liquid
Gas
Piping
kg
mm
mm
m2
flared
8~16
Item
Cooling capacity
model
Btu/h
AE122FCBKA
12000
Heating capacity
Dehumidifying capacity
Btu/h
Connection method
Suited area
Controller type
NˈVˈHz 1PH 220V-230V 50HZ
R407C
dB(A)
42/38/32
Type × Number
centrifugal fan×2
Fan
Air-flow(H-M-L) m³/h
starting mothod
Piping
mm
Gas
Connection method
Suited area
Controller type
kg
mm
m2
AE142FCBKA
14000
16000
2
Power source
Refrigerant
Noise level(H/M/L)
mm×mm×mm
674×225×450
18
6.35
9.52
flared
11~21
wired controller or remote controller
14000
10ϋ³×m³/h 1.8
Heat exchanger
Refrigerant control method
Dimension ˄L×W×H˅ External
Weight
Net
Liquid
AE092FCBKA
9000
11000
1.6
1PH 220V-230V 50HZ
R407C
R407C
36/32/29
36/32/29
centrifugal fan×2
centrifugal fan×2
520 / 420 / 300
520 / 420 / 300
Relay control
Relay control
Combination of wave cranny radiation fin and copper
Capillary + EEV
674×225×450
18
6.35
9.52
mm×mm×mm
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
1PH 220V-230V 50HZ
R407C
42/38/32
centrifugal fan×2
650 / 550 / 400
700/ 550 / 400
Relay control
Relay control
Combination of wave cranny radiation fin and copper
Capillary + EEV
828×225×450
20
6.35
828×225×450
20
6.35
12.7
flared
12~23
12.7
flared
17~27
wired controller or remote controller
-10-
Commercial Air Conditioner
Item
model
Cooling capacity
Heating capacity
Dehumidifying capacity
Power source
Refrigerant
Noise level(H/M/L)
24000
28000
3
NˈVˈHz 1PH 220V-230V 50HZ
1PH 220V-230V 50HZ
R407C
48 / 43 / 36
Controller type
Piping
Indoor unit
Item
Function
Capacity
Capacity
Dehumidifying capacity
Power cable
Communication cable
Power source
Running current
Unit model (color)
Fan
Type × Number
Speed
Motor output power
Air-flows (H/M/L)
Heat exchanger Type / Diameter
Total area
Temp. scope
Dimension
External
(L×W×H)
Package
Drainage pipe
material, diameter
Controller type
Refrigerant control
Noise level
H/M/L
Weight
Net / Shipping
Refrigerant
Type
Pipe
Liquid
Gas
Connecting method
R407C
48 / 43 / 36
centrifugal fan×2
centrifugal fan×2
1000 /900/700
1000 /900/700
Relay control
Relay control
Combination of wave cranny radiation fin and
Capillary + EEV
Capillary + EEV
mm×mm×mm
‚‚
‚‚
kg
mm
mm
25
9.52
15.88
25
9.52
15.88
flared
23~36
wired controller or remote
controller
flared
32~49
wired controller or remote
controller
Connection method
Suited area
AE242FCBKA
18000
20000
10ϋ³×m³/h 2.4
dB(A)
Heat exchanger
Refrigerant control method
Dimension ˄L×W×H˅ External
Net
Weight
Liquid
Piping
Gas
AE182FCBKA
Btu/h
Btu/h
Type × Number
Air-flow(H-M-L) m³/h
starting mothod
Fan
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
m
2
Model
——
BTU/h
W
10ϋ³×m³/h
——
——
N, V, Hz
A/A
——
——
r/min
W
m³/h
mm
m²
ć
mm
mm
mm
——
——
dB(A)
kg / kg
——
mm
mm
——
AS182FCBHA
Cooling
18000
5200
Heating
20000
5800
2.0
3 × (1.0~1.5mm2 )
2x(0.75~1.25mm2 )
1, 220~230, 50
0.10
0.10
AS182FCBHA (white)
CROSS×1
1350/1150/900
25
760/630/560
TP2M / 6.35×0.7
about 0.15
cooling: 6~7 / heating: 43~60
928×197×265
1025×309×330
PVC, 11.4/16.4
Phone type infrared
EEV
44/41/38
11/14
R407C
6.35
12.7
Flared
-11-
Commercial Air Conditioner
Piping
Indoor unit
Piping
Indoor unit
Item
Model
Function
——
Capacity
BTU/h
Capacity
W
Dehumidifying capacity
10ϋ³×m³/h
Power cable
——
Communication cable
——
Power source
N, V, Hz
Running current
A/A
Unit model (color)
——
Fan
Type × Number
——
Speed
r/min
Motor output power
W
Air-flows (H/M/L)
m³/h
Heat exchanger
Type / Diameter
mm
Total area
m²
Temp. scope
ć
Dimension
External
mm
(L×W×H)
Package
mm
Drainage pipe
material, diameter
mm
Controller type
——
Refrigerant control
——
Noise level
H/M/L
dB(A)
Weight
Net / Shipping
kg / kg
Refrigerant
Type
——
Pipe
Liquid
mm
Gas
mm
Connecting method
——
Item
Model
Function
——
Capacity
BTU/h
Capacity
W
Dehumidifying capacity
10ϋ³×m³/h
Power cable
——
Communication cable
——
Power source
N, V, Hz
Running current
A/A
Unit model (color)
——
Fan
Type × Number
——
Speed
r/min
Motor output power
W
Air-flows (H-M-L)
m³/h
Heat exchanger
Type / Diameter
mm
Total area
m²
Temp. scope
ć
Dimension
External
mm
(L×W×H)
Package
mm
Drainage pipe
material, diameter
mm
Controller type
——
Refrigerant control
——
Noise level
H/M/L
dB(A)
Weight
Net / Shipping
kg / kg
Refrigerant
Type
——
Pipe
Liquid
mm
Gas
mm
Connecting method
——
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AS072FCBHA
AS092FCBHA
Cooling
Heating
Cooling
Heating
7000
9500
9000
10000
2000
2800
2600
3200
1.0
/
1.0
/
2
3 × (1.0~1.5mm )
2
2x(0.75~1.25mm )
1, 220~230, 50
0.10
0.10
0.10
0.10
AS072FCBHA (white)
AS092FCBHA (white)
CROSS×1
CROSS×1
1050/900/800
1250/1050/900
25
25
520/410/300
600/500/410
TP2M / 6.35×0.7
about 0.15
about 0.15
cooling: 6~7 / heating: 43~60
795×197×265
795×197×265
880×315×330
880×315×330
PVC, 11.4/16.4
Phone type infrared
EEV
36/33/29
37/35/30
7.6/10.6
7.6/10.6
R407C
6.35
12.7
Flared
AS122FCBHA
AS142FCBHA
Cooling
Heating
Cooling
Heating
12000
15000
14000
17000
3500
4500
4000
5000
1.6
/
2.0
/
2
3 × 0.75mm
2x(0.75~1.25mm 2 )
1, 220~230, 50
0.15
0.15
0.15
0.15
AS122FCBHA (white)
AS142FCBHA (white)
CROSS×1
CROSS×1
1250/1050/900
1250/1050/900
25
25
630/520/410
640/570/450
TP2M / 6.35×0.7
about 0.20
about 0.20
cooling: 6~7 / heating: 43~60
795×197×265
928×197×265
880×315×330
1025×309×330
PVC, 11.4/16.4
Phone type infrared
EEV
39/37/30
44/41/38
7.6/10.6
11/14
R407C
6.35
12.7
Flared
-12-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Norminal condition: indoor temperature (cooling): 27 ćDB/19ćWB, indoor temperature (heating): 20ćDB
Outdoor temperature(cooling): 35ćDB/24ćWB, outdoor temperature(heating): 7ćDB/6ćWB
The noise level will be measured in the third octave band limited values, using a Real Time Analyser calibrated sound
intensity meter. It is a sound pressure noise level. The detailed method please refer to the following information:
Installation state: the unit should be placed on the flat floor or be mounted in horizontal direction.
Testing method:
mounting-on-wall unit:
built-in-ceiling unit:
duct unit without auxiliary duct:
2m
duct
1.4m
1.4m
0.8m
1m
1m
outdoor unit:
1.air outlet from side: the noise level is the average sound pressure level measured from front, left, right
directions.
2.air outlet from top: the noise level is the average sound pressure level measured from front, back, left,
right directions.
measured point:
H ( height to the ground) = (h (unit height) + 1m) /2
and, it is 1m to each side.
1m
1m
1m
h
Note: Ĵ is the real
time analyser position
-13-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
3. Safety precaution
Carefully read the following information in order to operate the airconditioner correctly.
Below are listed three kinds of Safety Cautions and Suggestions.
WARNING! Incorrect operations may result in severe consequences of death or serious injuries.
CAUTION! Incorrect operations may result in injuries or machine damages; in some cases may
cause serious consequences.
INSTRUCTIONS: These information can ensure the correct operation of the machine.
Be sure to conform with the following important Safety Cautions.
The Safety Cautions should be at hand so that they can be checked at any time when needed.
If the conditioner is transferred to the new user, this manual should be as well transferred to the new user.
WARNING!
If any abnormal phenomena is found
(e. g.smell of firing), please cut off the
power supply immediately, and contact
the dealer to find out the handling
method.
Don't dismantle the outlet of the
outdoor unit.
The exposed fan is very dangerous
which may harm human beings.
In such case, to continue using the
conditioner will damage the conditioner,
and may cause electrical shock or fire
hazard.
switch
off
After the unit being used for a long time,
the base should be checked for any
damages.
When the unit needs maintenance and
repairment, please call dealer to handle it.
Incorrect maintenance and repairment
may cause water leak, electrical shock
and fire hazard.
If the damaged base is not repaired, the
unit may fall down and cause accidents.
-14-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
WARNING!
Installed electrical-leaking circuit
breaker.
Nothing or nobody is permitted to
placed on or stand on outdoor unit.
It easily cause electrical shock without
circuit breaker.
The falling of goods and people may
cause accidents.
Air-conditioner can't be installed in
the environment with inflammable
gases because the inflammable gases
near to air-conditioner may cause fire
hazard.
Please let the dealer be responsible for
installing the conditioner.
Don't operate the air-conditioner with
damp hands.
Incorrect installation may cause water
leak, electrical shock and fire hazard.
Otherwise will be shocked.
Call the dealer to take measures to
prevent the refrigerant from leaking.
If conditioner is installed in a small
room be sure to take every measure in
order to prevent suffocation accident
Only use correctly-typed fuse.
even in case of refrigerant leakage.
May not use wire or any other materials
replacing fuse, other-wise may cause
faults or fire accidents.
When conditioner is removed or
reinstalled, dealer should be responsible
for them.
Incorrect installation may cause water
leaking, electrical shock and fire hazard.
Connect earthing wire.
Earthing wire should not be connected to the gas pipe, water pipe,
lightning rod or phone line, in-correct
earthing may cause shock.
Use discharge pipe correctly to ensure
efficient discharge.
Incorrect pipe use may cause water
leaking.
Earthing
-15-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
4. Net dimension
AU242FHBHA
948
Power wiring terminal
840
25
70
55
18
70
340
380
184
580
184
AU48*
948
Power wiring Terminal
580
184
70
55
25
18
380
340
1250
18
184
-16-
Screw Hole
(4xM10)
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AB** Cassette unit:
:;9
A9
ITL ZPM VITMRC ;>SS
VITMR
KMQRQTO
B>
:A9
><>SS 7JMZ]MMT Y[YVMTYQUT VURMY8
NXMYP IQX PURM
>@9SS 7QTLUUX [TQZ LQSMTYQUT8
?>9SS 7KMQRQTO UVMTQTO LQSMTYQUT8
@99SS 7VITMR LQSMTYQUT8
:=9
GFEH D
GFEH D
AE** Ceiling concealed unit
54
25
100
25
225
b
a
0
R1
55
C
30
240
R5
29(5
93
unit model
a
b
c
AE072FCBKA
AE092FCBKA
615
650
452
AE122FCBKA
AE142FCBKA
704
800
452
AE182FCBKA
858
1020
452
AE242FCBKA
990
1350
452
-17-
<;9SS
Y[YVMTYQUT PURLMX
:>9SS
@99SS 7VITMR LQSMTYQUT8
OIY VQVM
?>9SS 7KMQRQTO UVMTQTO LQSMTYQUT8
RQW[QL VQVM
>@9SS 7QTLUUX [TQZ LQSMTYQUT8
LXIQTIOM VQVM
U\MXRIVML LQYZITKM JMZ]MMT ZPM KMQRQTO
?9SS
B9
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AS** series
O
:=DA
I
P
Q
FH@AE
AS072FCBHA AS092FCBHA
AS122FCBHA
462
AS142FCBHA AS182FCBHA
6/5
=
>
?
/32
.64
-18-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Dimensions for MP2A, MP3A:
Installation on the horizontal ceiling:
horizontal ceiling
-19-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
vertical wall
Installation on the vertical wall (adjust the installation position by fixing holder):
-20-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
5. Installation Instructions
5.1 Piping dimension chart
liquid pipe
model
mm
inch
AU24
9.52
3/8"
AU48
9.52
3/8"
AB09
6.35
1/4"
AB14
6.35
1/4"
AB18
6.35
1/4"
AE07
6.35
1/4"
AE09
6.35
1/4"
AE12
6.35
1/4"
AE14
6.35
1/4"
AE18
9.52
3/8"
AE24
9.52
3/8"
AS07
6.35
1/4"
AS09
6.35
1/4"
AS12
6.35
1/4"
AS14
6.35
1/4"
AS18
6.35
1/4"
gas pipe
mm
inch
15.88
5/8"
19.05
3/4"
12.7
1/2"
12.7
1/2"
12.7
1/2"
9.52
3/8"
9.52
3/8"
12.7
1/2"
12.7
1/2"
15.88
5/8"
15.88
5/8"
12.7
1/2"
12.7
1/2"
12.7
1/2"
12.7
1/2"
12.7
1/2"
5.2 Y-shape manifold pipe
12.7
15.9
9.52
12.7
15.88
9.52
75
model: FQG-B120
<gas side>
15.88
heat preservation
material
9.52
12.7
<liquid side>
9.52
6.35
75
12.7
9.52
heat preservation
material
12.7
9.52
Dimension is the out diameter connecting to the tubing.
-21-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
FQG-B180
Refrigerant pipes between manifold pipes
Total refrigerating amount of indoor unit
Gas side
Liquid side
group after the manifold pipe
Less than 38220Btu/h
15.9
9.52
38220~61157Btu/h
19.05
9.52
61157~126137Btu/h
25.4
12.7
Note: 1. Y-shape manifold pipe can be placed in horizontal or vertical
direction
2. The manifold pipes must be welded with hard-solder
3. Pay attention to cut off the unnecessary part from its middle
parts of each joint, and to remove burr.
-22-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
In the file, the figure marked with "Ĝ" is permitted, and the figure marked with "h" is prohibited.
You can confirm the position according to the actual condition.
The refrigerant flow direction is always from the collective side to the divided side.
horizontal
horizontal
floor surface
floor surface
floor surface
floor surface
vertical
floor surface
floor surface
vertical
floor surface
floor surface
floor surface
-23-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
5.3 Instructions for the Electrical Expansion Valve Boxes
The E.E.V.B. general information for the C-MRV and H-MRV indoor units.
1. Installation position
0°
wiring connector
360°
liquid pipe in/out
180°
0°
Z: vertical direction
X, Y: horizontal direction
2. Installation place
The box should be installed where the place:
a. do not have vibrations;
b. easy to piping with the indoor and the outdoor unit, and the distance from the box to the indoor unit
should not exceed a certain value;
c. do not have a heat or steam source nearby;
d. should be sunless and be dry;
e. should be well ventilated and rainproof;
f. do not have a strict noise restriction, because when working the box may make some noise;
-24-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
5.4 MP2A, MP3A Installation Requirement
vertical wall
1. Cautions
1.1 The place should be strong enough to support this equipment, no vibrantion;
1.2 The place where is convenient to install the indoor unit, outdoor unit and the refrigerant pipe, and
the length of the pipe is in the permitted range;
1.3 No heat source and gas source nearby;
1.4 The place has enough space for installation and maintenance;
1.5 Donpt installation in the place in the state of high temperature and high humidity for a long time;
1.6 The place with good ventilation, no direct sunshine and rain;
1.7 Donpt install the unit near the bedroom because of the refrigerant flow noise;
Please refer to the cautions and warnings in the operation manual about the other safety cautions.
2. Installation Method
2.1 MP2A, MP3A can be installed on the horizontal ceiling or the vertical wall by adjusting the fixing
holder. The maintenance plate should be installed on the place easy to maintain and near the place,
there should be checking hole with 600mm*600mm (adjust the fixing holder as below figure).
2.2 The equipment has been dealt with the EPS heat insulation material, so the drainage pipe needs
not any other treatments.
2.3 The pipe connected to indoor is led from the branch pipe of the equipment. The gas pipe
diameter can realize to match with different diameters by the changing pipe according to the
indoor pipe diameter request.
2.4 In installation, the equipment gradient should be in the range of 5¤, or it may cause electronic
expansion valve body in the equipment leakage or the other bad control failure.
2.5 Bolt, screw cap and gasket to fix the equipment will not be supplied by factory.
3. Wiring Connection
3.1 The wire and refrigerant pipe must be connected to the corresponding place (refer to marks on
the equipment and the terminal block as 1,2,3).
3.2 Wiring diagram is sticked on the back of cover plate, and the wiring must be performed
according to the wiring diagram, or the control will be bad or indoor and the equipment will be
damaged.
3.3 After wiring, the wires must be fixed with the wire clip firmly, in case that the electric control parts
are damaged or occurs person injury.
-25-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
5.5 Connecting figure:
670 ;9E := LJ=< >FI KMF AE<FFI LEAKJ- GC=9J= ;FE>AID K@= 670 HL9EKAKO 9;;FI<AE? KF K@= 9;KL9C AE<FFI LEAKJ/
671 ;9E := LJ=< >FI K@I== AE<FFI LEAKJ- GC=9J= ;FE>AID K@= 671 HL9EKAKO 9;;FI<AE? KF K@= 9;KL9C AE<FFI LEAKJ/
5EJK9CC9KAFE D=K@F< AJ :=CFM- M@A;@ FECO K9B=J 671 9J 9E =N9DGC=/ 7C=9J= G9O 9KK=EKAFE K@9K K@= ?9J GAG=J
AEJK9CC9KAFE AJ 9J K@= J9D= 9J K@= ;FE<AKAFE MAK@FLK 670+671,/
AE<FFI CAHLA< GAG=
AE<FFI 2
QRP
FLK<FFI CAHLA< GAG=
AE<FFI 3
AE<FFI 4
AE<FFI 20
QRP
8.J@9G= D9EA>FC< GAG=
Piping length and drop between units
Haier
+
-26-
AE<FFI 30
AE<FFI 40
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
1) When connected with 8 units,indoor units refer to <admissible combination examples>
2) Total length=l1+l2*2+l3*4+l4*4+l5*4<=100m
3) Max. piping length =(l1+l2+l3+l5)<=70m
4) Max. piping length between the indoor unit and the first branch pipe<=30m
5) Max. drop between outdoor unit and indoor unit: H<=30m(indoor above
outdoor);H<=20m(indoor below outdoor)
6) Max. drop between the two indoor units : h<=10m
7) Expansion valve is less than 15m to its corresponding indoor unit
8) Only wall mounted types are connected with expansion valves.
9) The expansion valves of different indoor models are different.
10)The first branch pipe must use FQG-180,the others use less than it.
Combination example:
8 by 1:
Haier
AE07
AE07
MP3A
AE07
AE07
AE07
MP3A
AE07
AB09
AS07
EEV
Note:
1.AU24 can connect with max. 5 indoor units, and AU48 can connect with max. 8 indoor units, but pay
attention that the total indoor capacity can not exceed 130% of outdoor cooling capacity.
2. The ceiling concealed unit must connect with the outdoor unit through the MP2A or MP3A; the wall mounted
unit must connect with the outdoor unit through the exterior EEV box; while for the cassette unit, because it has
the built-in EEV, so it need not anything and it can connect to outdoor directly.
-27-
Commercial Air Conditioner
6 by one
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AS09 (or other 9000BTU units)
AS09 (or other 9000BTU units)
Haier
AS09 (or other 9000BTU units)
AU48-
AS09 (or other 9000BTU units)
AS09 (or other 9000BTU units)
EEV
AS09 (or other 9000BTU units)
-28-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
5.6 The Order of Installation Work
Item
Work
Before installation
Work division
Make installation
diagram
Installation of indoor and
outdoor unit
Refrigerant pipe work
Work
Main points
-to ascertain the person responsible for installation of pipes and wiring
-to ascertain the pipe installation dimension and position of electronic
expansion valve, to make control wiring system diagram
-to prevent the ventilation from short circuit and guarantee repair space
Drain pipe work
-Pay attention to dry, clean and seal
-Slant downward
Heat insulation work
-No gaps in the joint of heat insulation material
Wiring work (control
wire, power cord)
Set every set switch
-Choose the proper wire and cord
Airtight test
Vacuum drying
Additional refrigerant
Test run adjustment
Training of use and
maintenance
-Should be complied with control wiring system diagram
-Close all the gas, liquid valves
-Should the vacuum pump that can reach 200Pa vacuity
-Write down the additional refrigerant amount on the outdoor unit body
and record table
-Do test run to indoor unit one by one to verify if there is wrong pipes
-Explain to user, simultaneously provide all the documents
The above work order is general knowledge, they may be changed to be complied with the
specific work site.
5.7 Attentive matters of safety
Before installing, do read this [Attentive matters of safety] carefully to guarantee the
proper installation.
The below attentive matters are divided into [warning] and [note] two parts. When the
wrong installation occur, it is very possible death and severe injury and other serious
accidents will happen. For those items are listed in [warning] part. But even the items
listed in [note] part can also cause serious accidents. Above all, both the two parts are
very important contents related to safety, so they must be obeyed.
After installation, do test run to verify everything is normal, after that please explains the
use method and maintenance method to the user according to the operation manual.
Additionally, give the installation manual together with operation manual to the user and
ask them to keep them properly.
Warning
The distributing shop, where you bought the air conditioner, or the specified shops shall
do the installation work. If you do the installation work by yourself, the improper
installation will cause water leakage, electric shock fire and other accidents.
The installation work shall be in line with what the installation manual specified. If
installation is not proper, water leakage, electric shock, fire and other accidents will
occur.
Install the air conditioner to a place where can definitely stand its weight. Places not firm
enough will cause drop down of unit resulting in body hurt.
The installation work shall be preventive to typhoon and earthquake. If the installation
-29-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
work is not met with the requirements, overturn of the unit will occur resulting in
accidents.
The wiring work shall be done by a qualified person and referred to the “technical
standard of electric equipment”, “indoor wiring regulation” and what the manual
specified. Do use special circuit. If the capacity of the circuit is not enough or bad work,
electric shock, fire and other accidents will happen.
Using the specified cable to do wiring work and connecting firmly and properly. Fix the
connecting part of the terminals to prevent it from the external force. Improper
connection and fixing will cause heating and fire etc. accidents.
Wiring shall be kept in correct shape avoiding extrusion. After installation, the electric
box cover and the external panel shall not nip the wire. Improper installation will cause
heating and fire etc. accidents.
When setting or moving the air conditioner do not let the air and things alike get into the
refrigeration system except the specified refrigerant. If air and other things enter,abnormal
high pressure will occur, which easily cause break and body injuries etc.
When installing, do use the accessories or specified parts. If not using the parts specified
by our company, water leakage, electric shock, fire and refrigerant leakage will occur.
Do not lead the drainpipe to drain where the sulfur gas may be involved. Otherwise, the
poisonous gas will enter into the indoor.
During installation, if refrigerant leakage occurs, do the ventilation work immediately. As
soon as the refrigerant gas meets fire, poisonous gas will be produce. If the refrigerant gas
enters into room and meet the air blowing heater, heater or stove etc. fire source, the
poisonous gas may be produced. After installation, confirm there is no leakage of
refrigerant.
Do not install the unit in a place where the combustible gas may be leaked. In any case
the combustible gas leaks and accumulated around the unit, fire accident will occur.
Do heat insulation work to the refrigerant gas pipes and liquid pipes to reach the purpose
of heat preservation. If the heat insulation measure is not sufficient, water generated by
condensing dew will drip leading to wet the floor and indoor articles.
Do not damage the power line or change it arbitrarily to avoid occurrence of fire or
electric shock.
Do not extend the power line or using other electric appliance in the same power
receptacle to avoid fire or electric shock.
Note
Do grounding work. Do not connect the grounding wire to gas pipe, tap, lighting rod or
telephone line. Improper grounding will cause electric shock.
In some places the electric leakage breaker shall be installed. If do not install the breaker,
electric shock may occur.
After installation, power on to do electric leakage detecting test.
-30-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
5.8 Special Work and Main Points in Installation
Warning
During installation, if refrigerant leakage occurs, take ventilation
measurement immediately.
As soon as the leaked refrigerant
gas meets fire, poisonous gas will
generate.
After finishing installation, confirm
the refrigerant gas does not leak.
If the refrigerant gas leaks in the
room, once it meets heater, burner
and gas stove etc. fire source, the
poisonous gas will generate.
A. Choosing of pipes
According to the following indoor unit and outdoor unit installation diagram to choose the
material and size of pipes and branch pipes.
B. Connection of pipes
1 Method of pipe connection
a. T he pipe shall be as short as possible to guarantee efficiency.
b. Daub the refrigerant oil on the connection and flare nut.
c. When bending the pipes, give the roundness as large as possible, to avoid crashing the
pipes.
d. To connect the pipe, fit the center and screw the nut with hand, then use spanner or
torque wrench to tighten it. The fastening torque as shown in below table. As shown in
figure.
e. Be careful alien matters, such as sands,
water etc. shall not enter the pipes.
Forced fastening without
careful centering may damage
the threads and cause gas
2. Welding of pipes
a. In welding, the nitrogen shall be used to
avoid oxidation of the pipe inner part.
b. The refrigerating pipe shall use clean
new pipes. When working, it shall take steps to prevent water and dust from entering.
c. When loosening and tightening the nuts, two spanners shall be used. If using one
spanner, it can not reach the desired degree of tightness.
Using the specified fastening torque to fasten nuts.
Pipe diameter (mm)
6.35
9.52
12.7
15.88
Installation torque (N.M.)
11.8 (1.2kgf.m)
24.5 (2.5kgf.m)
49.0 (5.0kgf.m)
78.4 (8.0kgf.m)
-31-
Fastening torque (N.M.)
13.7 (1.4kgf.m)
29.4 (3.0kgf.m)
53.9 (5.5kgf.m)
98.0 (10.0kgf.m)
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
(4) Pipe connection of the outdoor unit
Referring to the installation diagram in page 4, connect the indoor unit, outdoor unit,
branch pipe and electronic expansion valve together by using the pipe connection method and
welding method.
-32-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
5.9 Test of leakage after wiring work is finished
After connection of the refrigerant pipes, carry out leakage test. In this test,
pressurize to the pipes as shown in the below figure by using nitrogen tank.
Close the valves of the gas side and liquid side totally.
The nitrogen may enter the cycle system of the outdoor unit, so that, before pressurizing, the
valve rods must be fastened. (Both the gas side and liquid side).
For each of the refrigerant system, pressurize from the discharge valve of gas side in
procedure.
When doing leakage test, it is absolutely forbidden to use oxygen, flammable gas and
poisonous gas. The indoor unit expansion valve must be open.
5 vacuuming of the pipes and indoor unit (using vacuum pump to vacuums, it is strictly forbidden to use
refrigerant purging)
a. Choose of vacuum pump: it shall choose those that can reach a good vacuity (over 200Pa)and have
a large air discharge amount (over 40L/min).
b. After finishing the airtight quality test and the nitrogen discharging , connect the instrumental diverter
to the 3-way discharge valve, then connect the vacuum pump according to the below figure.
-33-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
c. Vacuumize 2~3 hours according to the length of the pipe. When vacuuming, confirm the
gas side and liquid side of the 2-way valve and 3-way valve shall be in full close state.
d. When it is not lower than 200Pa after 2 hours or more vacuuming, vacuums for another 1
hour. If after more than 3 hours vacuuming it is still not lower than 200Pa, the leak part
shall be found.
e. When it is lower than 200Pa after more than 2 hours vacuuming, close both the valve VL
and VH of the diverter, then close the vacuum pump. Place it there to observe if the
vacuity changes. If it changes, it indicates leakage exists, so the leak part shall be found.
f. After finishing the above vacuuming work, replace the vacuum pump with refrigerant
tank and turn to the refrigerant charging procedure.
5.10 Charging of refrigerant
1. Calculation of additional charging amount of refrigerant
After finishing vacuuming work, replace the vacuum pump with refrigerant tank and turn to
the refrigerant additional charging procedure.
Calculation of additional charging amount of refrigerant
Before the air conditioner leaving factory, the refrigerant-charging amount does not include
the refrigerant in the site pipe part. Calculate the refrigerant amount for the site pipe first, then
do the additional refrigerant charging work.
Refrigerant charging amount when air conditioner leaves factoryR407C:4200g.
Calculation method:
According to the liquid pipe dimension of site pipe and actual length to calculate the
additional refrigerant-charging amount.
Calculation formula:
Site refrigerant charging amount=Length of liquid pipe x additional refrigerant charging
amount/m
For example: additional charging amount
R (kg) = (L1x0.030kg/m)+(L2x0.065kg/m)
L1: Total length of liquid pipe diameter 6.35mm;
L2: Total length of liquid pipe diameter 9.52mm.
2. Charging of refrigerant
Close all valves of outdoor unit, and charge refrigerant from air discharge valve of gas side.
When can not charge the specified amount, firstly, open all the valves, both liquid side and
gas side, of outdoor unit, then switch the valve of gas side to close state a little. Under this
condition, do cooling operation and charge refrigerant from the discharge valve of gas side. At
this time, adjust the valve of the refrigerant tank to make the refrigerant in Gas State when it
is absorbed by system.
When refrigerant leakage making refrigerant lack in system occurs, the intrinsic refrigerant of
the system shall be recovered and recharge it according to specified amount.
3. Opening of the refrigerant pipe
Open all the valves of outdoor unit
-34-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
5.11 Refrigerant
QRU Y[cigWa W_g YdcZ_i_dc[g jh[h g[\g_][gWci :RGCIN:A T^_h g[\g_][gWci _ih[a\ _h _ccdYjdjh?cdc@YdbXjhi_Xa[
hW\[in g[\g_][gWciA Mji i^[c? l^[c WggWc]_c] i^[ W_g YdcZ_i_dc[g [fj_eb[ci? _i _h c[Y[hhWgn id iW`[ hdb[
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k[ci_aWi_dc [fj_eb[ciA
-35-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
5.12 Electric cautions:
Power supply specs
model
AU242FHBIA
AU482FIBIA
AU48NFIBJA
AE*FCBKA
AS*FCBHA
Power source
1PH, 220-230V~,
50Hz
1PH, 220-230V~,
50Hz
3PH, 380-400V~,
50Hz
1PH, 220-230V~,
50Hz
Connecting wire
Circuit Power
breaker cable
30A
5mm2
50A
10mm2
20A
4 mm2
Communication
wire
Wired controller
wire
core section area core section area
2
1.0-1.5mm2
3
15A
1.5mm
AB*FCBIA
2
3
0.75mm2
3
Remark:
1. Must not connect the power cable and communication wire incorrectly. Forbidden to connect
the power cable and communication wire with one muti-core cable, and they must be wired
separately, keep proper distance between them to ensure the air conditioner run normally.
2. Communication wires among indoor units should be hand in hand type, and decrease the
branch, also the shielded layer should be connected together and be earthed on one point.
3. All indoor communication wires will be connected to the communication bus wire (2-core), C1
and C2 are non-polar.
4. Because the indoor unit adopts EEV control method, when a sudden power off occurs, the
EEV maybe keep some angle. If indoor unit and outdoor unit connect to power supply
separately, when some indoor units running in cooling mode, when powered off, because
the EEV does not reset, the indoor units maybe drop water, or ice up. We recommend that the
indoor unit connect to power supply from the outdoor unit, or use one power supply with the
outdoor unit. If the indoor unit need connect power supply individually, the personnel must
explain to the customer that he (she) must switch off the unit with wired controller or remote
controller, then he (she) can shut off the indoor unit. If there is accidental power failure,
please firstly power on all the indoor units after power on, in order to reset the indoor EEV.
5. When wiring the MP2A or MP3A, please ensure that the power source and the communication
wires of MP2A or MP3A must correspond with the relative indoor units.
6. AS*FCBHA and the cassette unit will not be connected with the MP2A or MP3A.
7. If the ceiling concealed indoor unit is with the electric heater, the circuit breaker will vary
accordingly.
-36-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
5.13 Indoor unit number setting:
Indoor unit has two kinds of control type: infrared control and wired contrl, so the corresponding
unit address setting will vary as the following: for the infrared control type unit, set with the
address setting controller; for the wired control type unit, set with the dip switch, and the unit
number is from 1 to 8.
(1) Number setting for wired control type unit:
1
2
3
4
Indoor unit No.
0
0
0
0
1
1
0
0
0
2
0
1
0
0
3
1
1
0
0
4
0
0
1
0
5
1
0
1
0
6
0
1
1
0
7
1
1
1
0
8
Note:
1. Dip switch at ON position shows 0.
2. If there are not only the infrared control type unit also the wired control type unit in the whole
system, please set the wired control type unit number firstly and then record the numbers,
then set the infrared control type unit number, to avoid the repeated unit number.
(2) Number setting for infrared control type unit:
Please refer to the manual of address setting controller ASC-02.
5.14 The dip switch setting when out of factory:
AE*FCBKA: Unit No.: 3; 3 fan speeds; wired control type; exterior EEV. That is: SW01-1 ON,
SW01-2 OFF, SW01-3 ON, SW01-4 OFF; SW02-1 ON, SW02-2 OFF; SW03-1 ON, SW03-2 ON.
AB*FCBIA: Unit No.: 3; 3 fan speeds; infrared control type; built-in EEV. That is: SW01-1 ON,
SW01-2 OFF, SW01-3 ON, SW01-4 OFF; SW02-1 OFF, SW02-2 ON; SW03-1 OFF, SW03-2 ON.
When installation, the installer should adjust the setting according to the actual condition.
The ports functions for AB and AE unit (some are optional):
port
Corresponding parts
port
Corresponding parts
CN4
Negative ion generator or high-voltage
accumulator
CN5
Gas/liquid pipe temp. sensor
CN6
EEV
CN7
Pump motor
CN10
Indoor motor
CN11
Float switch
CN12
Swing motor
CN13
Remote receiver
CN14
Wired controller
CN18
Neutral line of terminal block
CN19
Auxiliary electric heating
CN20
Live line of terminal block
CN22
Auxiliary electric heating
CN24
Room temp. sensor ˄ AE*
unnecessary˅
CN25
Communication of EEV box
CN9
Pre-set
-37-
Commercial Air Conditioner
Cassette unit installation:
t~,-w||w-{*~ v**|,
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
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-38-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
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-39-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
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Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
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-41-
4/mWo lWbl[
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Installation for wall mounted unit
Please read these "Safety Precautions" first then accurately execute the installation work.
The precautionary points indicated herein are divided under two headings:
! WARNING and
! CAUTION those points which are related to the strong possibility of an
installation done in error resulting in death or serious injury are listed in the ! WARNING
section. However, there is also a possibility of serious consequences in relationship to the
points listed in the ! CAUTION section as well.
In either case, important safety related information is indicated, so by all means, properly
observe all that is mentioned.
After completing the installation, along with confirming that no abnormalities were seen
from the operation tests, please explain operating methods as well as maintenance methods to
the user of this equipment, based on the owner's manual.
Moreover, ask the customer to keep this sheet together with the owner's manual.
WARNING
Please entrust installation to either the company which sold you the equipment or to a
professional contractor. Defects from improper installations can be the cause of water
leakage electric shocks and fires.
Execute the installation accurately, based on following the installation manual. Again improper
installations can result in water leakage, electric shocks and fires.
Please install your air conditioner on a wall or any place which can holder the weight of the
air conditioner. And it cannot be installed on a non-professional metal structure (such as a
burglary-resisting net). Otherwise injury would occur due to a falling of the unit.
Execute the prescribed installation construction to prepare for earthquakes and the strong airs
of typhoons and hurricanes, etc. Improper installations can result in accidents due to a violent
falling over of the unit.
Wiring shall be done with the specified cable and the connection shall be firm and reliable.
And the terminal connector shall be fixed firmly and reliably not to let external force exercise
on the cables. Any improper connection or fixing would cause heat, fire, and other accidents.
Wiring shall be done in a correct shape not to make any section rise upward, and accurately
install the air conditioner. The cable shall not be clamped by the lid or outer plate. Any
improper installation would lead to fire, heat, or other accidents.
When setting up or moving the location of the air conditioner, do not mix air etc, or anything
other than the designated refrigerant (R407C) within the refrigeration cycle, for such mixing
would result in rupture and injury caused by abnormal high pressure.
Always use accessory parts and authorized parts for installation construction. Using parts not
authorized by this company can result in water leakage, electric shock, fire and refrigerant
leakage.
The drain pipe must not be placed or connected into the sewage tank where harmful gas such
as sulphurous gas and etc would exist, otherwise the harmful gas would enter the room.
During installation, if the refrigerant is leaked, please immediately take measures of
ventilation, otherwise a harmful gas would be generated whenever the refrigerant meets fire.
After installation, please ensure that the refrigerant is not leaked, because the leakage of
refrigerant would produce a harmful gas if it meets fire or heating stoves.
Don't install the air conditioner where a flammable gas would be probably produced,
otherwise in case the flammable gas is leaked and exists around the unit, fire would be
caused.
For the drain pipe, follow the installation manual to insure that it allows proper drainage and
thermally insulate it to prevent condensation. Inadequate plumbing can result in water
leakage and water damage to interior items.
The refrigerant gas pipe and liquid pipe shall all be thermally insulated to preserve the
temperature. Any improper insulation would make the unit moist and the water would drop
onto the floor or wet the indoor items.
-42-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
PRECAUTION
Execute proper grounding. Do not connect the earth wire to a gas pipe, water pipe,
lightening rod, or a telephone ground wire.
Improper placement of earth wires can result in electric shock.
An electric leakage breaker must be installed, otherwise electric shock or other accidents
would occur.
After completion of the installation, the air conditioner shall be electrified to check for
electric leakage.
Preparation for installation
Installation Tools
1. Screw Driver (flat head, wabbler, triangle)
2. Steel Saw
3. 60mm Drill
4. Inner Hexagon Spanner
5. Shifting Spanner
6. Spanner
7. Pipe Cutter
8. Pipe Expander
9. Knives
10. Clippers
11. Leakage Checker or Soap Liquid
12. Measuring Tape
13. Scraper or File
14. Refrigeration Oil
Self-contained Accessories
No.
A
B
Name of Non-adhesive Adhesive
Tape
Parts
tape
C
D
Connecting Heat
insulation
Hose
material
E
Gypsum
powder
F
Drain hose
Electrical Requirements
Power supply voltage: Single Phase 1PH, 220-230V~, 50Hz.
A specialized power supply wire, which shall be installed by a competent person as per the
rules of the national standard.
Power supply must be grounded effectively.
An electric leakage breaker shall be installed.
Layout of power supply wiring shall be Y connection. If the power supply wire is damaged, it
must be replaced by the manufacturer or its service center or professional person (the power
supply wire shall be self-contained).
For connection of the power supply plug, L shall be connected with the live wire, N shall be
connected with netural line,
shall be connected with earth wire.
2
Power supply wire parameters:H05RN-F,3 G(1.0-1.5)mm ;
2
Signal wire parameters:H05RN-F,2 X (0.75-1.5)mm . (User shall self-provide signal wire )
Note:The singnal wire and connection wire should be provided for oneself.
The singnal wire must be shielded wire
!
WARNING
BE SURE TO READ THESE INSTRUCTIONS CAREFULLY BEFORE BEGINNING INSTALLATION. FAILURE TO
FOLLOW THESE INSTRUCTIONS COULD CAUSE SERIOUS INJURY OR DEATH, EQUIPMENT MALFUNCTION
AND/OR PROPERTY DAMAGE.
BE SURE TO READ INSTALLATION MANUAL FOR INDOOR UNIT WITH THIS MANUAL.
-43-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
1.Accessories
Confirm accessories shown below are attached in the bag with this Installation manual.
Accessories Delivered with Your Air Conditioner
Please check if your unit is delivered with the following accessories.
No.
Name
1
2
Remote
controller
Batteries
3
Mounting plate
4
6
5
Drain hose 4x25 screw
Expansion
bushing
7
8
9
Cement Piping hole Screw
steel nail cover
and
10
Plastic
supporting
plate
shape
Qty
1
2
1
1
6
6
8
1
2
1
Indoor Unit
Install the indoor unit where the weight of the unit can be supported.
Install the indoor unit where the heat source and steam source are not close and the
Unit inlet and outlet are not blocked.
Install the indoor unit where the drainage is easy and the outdoor unit can be
Easily connected.
Install the indoor unit where its cold air and hot air can be easily sent to all the comers
of the room.
Install the indoor unit where the power socket is near and there is sufficient space
around the indoor unit.
Install the indoor unit where there is no T.V set, radio set, and wireless appliance
Underneath, and the sunlight lamp is over one meter away.
If the remote controller is installed on the wall, the indoor unit shall be ensured to receive
The signal while the sunlight lamp is on.
Method for Cutting and Expanding Pipes.
When the pipe is too long or the mouth is damaged, the pipe needs to cut or expanded.
3.Put on nut
4.Expand Hose
2.Removing burr
1.cutting hose
Expansion Size
A
Hose dia.
6.35 mm(1/4)
12.7 mm(1/2)
Size (mm)A
0.8-1.5
1.0-2.0
Hose Expander
Not Correct
Correct
Tilting
cracks on expanded mouth burr
-44-
incomplete
too long
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
When the mounting plate is firstly fixed
1. Carry out, based on the neighboring pillars or lintels, a proper leveling for the plate
to be fixed against the wall, then temporarily fasten the plate with one steel nail.
2. Make sure once more the proper level of the plate, by hanging a thread with a
weight from the central top of the plate, then fasten securely the plate with the
attachment steel nail.
3. Making a Hole on the wall and Fitting the piping Hole cover
Make a hole of 60mm in diameter,
slightly descending to outside the wall.
Indoor side
Install piping hole cover and seal it
off with putty after installation.
Wall hole
Outdoor side
Thickness
of wall
60mm
4. Drawing of pipe
(Section of wall hole) Piping hole pipe
Rear piping
Draw pipes and the drain hose, then fasten them with the adhesive tape.
Left Left-rear, piping
In case of left side piping, cut away, with a nipper, the lid for left piping.
In case of left-rear piping, bend the pipes according to the piping direction to the mark
of hole for left-rear piping which is marked on heat insulation materials.
a. Insert the drain hose into the dent of heat insulation materials of indoor unit.
b. Insert the indoor/outdoor electric cord from backside of indoor unit, and pull it out
on the front side, then connect them.
c. Coat the flaring seal face with refrigerant oil and connect pipes.
Cover the connection part with heat insulation materials closely, and make sure fixing
with adhesive tape.
Heat insulation
material
Piping
Pipe supporting
plate
Drain hose
Lid for right piping
Indoor/Outdoor
Electric cable
Lid for left piping
Lid for under piping pipe
Fix with adhesive tape
Indoor/outdoor electric cord and drain hose must be bound with refrigerant piping by
Protecting tape.
-45-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Other direction piping
Cut away, with a nipper, the lid for piping according to the piping direction and then
bend the pipe according to the position of wall hole. When bending, be careful not
to crash pipes.
Connect beforehand the indoor/outdoor electric cable, and then pull out the
connected to the heat insulation of connecting part specially.
5.Fixing the indoor unit body
Hang surely the unit body onto the upper notches of the
mounting plate. Move the body from side to verify its
secure fixing.
In order to fix the body onto the mounting plate, hold up
the body aslant from the underside and then put it down
perpendicularly.
Putty
Electric wiring
When connecting the cord before installing the indoor unit
Insert the cord from the back side of the unit, then pull it out on the front side.
Loosen the screws and insert the cord ends fully into terminal block, then
tighten the screws.
Pull the cord slightly to make sure the cords have been properly inserted and
tightened.
After the cord connection, never fail to fasten the connected cord with the
wiring cover.
Note: when connecting the cord, confirm the
terminal number of indoor and outdoor units
carefully. If wiring is not correct, proper operation
can not be carried out and will cause defect.
! CAUTION
After connecting the piping, check the joints for gas leakage with gas leakage detector.
HOW TO CONNECT WIRING TO THE TERMINALS
A. For solid core wiring (or F-cable)(Fig.17A)
(1) Cut the wire with a wire cutter or wire-cutting pliers, then strip the insulation to about 25mm of
the exposed solid wire.
(2) Using a screwdriver, remove the terminal screw (s) on the terminal board.
(3) Using pliers, bend the solid wire to form a loop suitable for the terminal screw.
(4) Shape the loop wire properly, place it on the terminal board and tighten securely with the terminal
screw using a screw driver.
B. For strand wiring (Fig.17B)
(1) Cut the wire with a wire cutter or wire-cutting pliers, then strip the insulation to about 10mm of
the exposed strand wiring.
(2) Using a screwdriver, remove the terminal screw (s) on the terminal board.
(3) Using a round terminal fastener or pliers, securely clamp a round terminal to each stripped wire end.
(4) Position the round terminal wire, and replace and tighten the terminal screw using a screw driver.
Fig. 17
B. Strand wire
Loop
Insulation
Strip 10mm
Strip 25mm
A. Solid
Round
terminal
After passing the connection cord and power cable through the
insulation tube, fasten it with the cord clamp, as shown in Fig.18
-46-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Fig. 18
Screw with
special washer
Insulation tube
Cord clamp
Wire
Round
terminal
Terminal
board
Screw with
special washer
Round
terminal
Wire
Use VW-1, 0.5 to 1.0 mm thick, PVC tube as the insulation tube.
Check the Layout of the Drain Pipe and Connection Wires
The drain pipe should be placed underneath, and the connection wires should be placed upside;
and the drain pipe especially the section inside the machine and indoors must be wound up with
insulating material to preserve heat. The drain pipe shall be sloped and no concave and convex
shall occur along the whole pipe. And the cases as the right figure indicates shall not occur.
Installation check
Is power supply voltage required?
Is water completely drained to outdoors?
Are power wire and connection wires between indoor and outdoor units correctly connected?
Is any gas leaked from the pipe connectors?
Are series numbers of the terminals on the indoor and outdoor units corresponding to each
other? Is the connection section of the auxiliary pipe insulated? Is the indoor unit fixed firmly?
Is noise big?
Trial Operation
The person who has completed this installation shall be requested to conduct a test operation
for check:
Is the temperature adjuster working normally?
Does the location for installation conform to requirements?
Winding up with Protective Plastic Tape
The connection pipes, drain pipe, and the connection wires shall be wound up with PVC tape.
Notes: The connection pipes shall also be wound up with insulating material to preserve the
temperature. The airing direction shall be from bottom to top.
-47-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Ceiling concealed OIEN
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-48-
Commercial Air Conditioner
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Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
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-49-
Commercial Air Conditioner
A`i i\klie Yc`e[
A`i i\klie [lZk
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
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gXik f] k_\ le`k4 A`[\[ n`k_ X c\m\c d\k\i2X[aljk c\m\c f] k_\ le`k n`k_`e ;dd4
w 3=ONEJI
Ie fi[\i kf [iX`e nXk\i efidXccp2 k_\ [iX`e g`g\ j_Xcc Y\ gifZ\jj\[ Xj jg\Z`]`\[ `e k_\
`ejkXccXk`fe dXelXc Xe[ j_Xcc Y\ _\Xk `ejlcXk\[ kf Xmf`[ [\n ^\e\iXk`fe4 Idgifg\i _fj\
Zfee\Zk`fe dXp ZXlj\ `e[ffi nXk\i c\XbX^\4
-50-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Q\hl`i\d\ekj
S_\ `e[ffi [iX`e g`g\ j_Xcc Y\ k_\idXc `ejlcXk\[4
S_\ Zfee\Zk`fe gXik Y\kn\\e k_\ [iX`e g`g\ Xe[ k_\ `e[ffi le`k j_Xcc Y\ `ejlcXk\[ jf Xj kf gi\m\ek [\n
^\e\iXk`fe4
S_\ [iX`e g`g\ j_Xcc Y\ jcXek [fnenXi[j /^i\Xk\i k_Xe 7576604 S_\ d`[[c\ gXik j_Xcc efk Y\ f] R kpg\ \cYfn2
fk_\in`j\ XYefidXc jfle[ n`cc Y\ gif[lZ\[4
S_\ _fi`qfekXc c\e^k_ f] k_\ [iX`e g`g\ j_Xcc Y\ c\jj k_Xe 86 d4 Ie ZXj\ f] cfe^ g`g\2 jlggfikj j_Xcc Y\
gifm`[\[ \m\ip 74; t 8d kf gi\m\ek nXmp ]fid4
C\ekiXc g`g`e^ j_Xcc Y\ cX`[ flk XZZfi[`e^ kf k_\ ]fccfn`e^ ]`^li\4
SXb\ ZXi\ efk kf Xggcp \ok\ieXc ]fiZ\ fekf k_\ [iX`e g`g\ Zfee\Zk`fe gXik4
74;dr8d
Rlggfik
IejlcXk`fe
Dfne jcfg\
/jlggc`\[ Yp k_\ lj\i0 XYfm\ 75766
R kpg\ \cYfn
VXcc
Sf k_\ cXi^\jk /Xgg4 76Zd0
Nlkj`[\
UO96
Dfne jcfg\ XYfm\ 75766
RcXek
O`g\ Xe[ `ejlcXk`fe dXk\i`Xc
O`g\
DiX`e g`g\ /jlggc`\[
Yp k_\ lj\i0
Q`^`[ OUC g`g\ UO974;dd /`ek\ieXc [`Xd\k\i0
IejlcXk`fe FfXd\[ OE n`k_ k_`Zbe\jj XYfm\ = dd
Hfj\
DiX`e g`g\ j`q\@ /95:-0 OUC g`g\
S_\ _fj\ `j lj\[ ]fi X[aljk`e^ k_\ f]]3Z\ek\i Xe[ Xe^c\ f] k_\ i`^`[ OUC g`g\4
D`i\Zkcp jki\kZ_ k_\ _fj\ kf `ejkXcc n`k_flk dXb`e^ Xep [\]fidXk`fe4
S_\ jf]k \e[ f] k_\ _fj\ dljk Y\ ]Xjk\e\[ n`k_ X _fj\ ZcXdg4
Hfj\
Hfj\ ZcXdg
Oc\Xj\ Xggcp k_\ _fj\ fe _fi`qfekXc gXik
IejlcXk`fe ki\Xkd\ek@
ViXg k_\ _fj\ Xe[ `kj ZcXdg lek`c kf k_\
`e[ffi le`k n`k_flk Xep Zc\XiXeZ\ n`k_
`ejlcXk`e^ dXk\i`Xc2 Xj j_fne `e k_\ ]`^li\4
RlYj`[`Xip `ejlcXk`fe*
DiX`e Zfe]`idXk`fe
IejlcXk`fe
Q`^`[ OUC g`g\
Dli`e^ ki`Xc ile2 Z_\Zb k_Xk k_\i\ `j ef c\XbX^\ Xk k_\ g`g\ Zfee\Zk`fe gXik [li`e^ nXk\i [iX`e`e^ \m\e `e
n`ek\i4
AccfnXYc\ g`g\ c\e^k_ Xe[ [ifg
S_\j\ gXiXd\k\ij [`]]\i XZZfi[`e^ kf k_\ flk[ffi le`k4 R\\ k_\ `ejkilZk`fe dXelXc XkkXZ_\[ n`k_ k_\ flk[ffi
le`k ]fi [\kX`cj4
O`g\ dXk\i`Xc Xe[ j`q\
O`g\ dXk\i`Xc O_fjg_filj [\fo`[`q\[ Zfgg\i j\Xdc\jj g`g\ /SO80 ]fi X`i Zfe[`k`fe\i
O`g\ j`q\
/dd0
GXj j`[\
K`hl`[ j`[\
s784=6
s<49;
Q\Z_Xi^\ f] i\]i`^\iXek
S_\ i\]i`^\iXek i\Z_Xi^\ j_Xcc Y\ g\i]fid\[ Xj jg\Z`]`\[ `e k_\ `ejkXccXk`fe `ejkilZk`fej4 S_\ X[[`e^
gifZ\[li\ j_Xcc Y\ X`[\[ n`k_ X d\Xjli`e^ d\k\i ]fi X jg\Z`]`\[ Xdflek f] jlggc\d\ek\[ i\]i`^\iXek4
Q\hl`i\d\ek
Lfi\ fi c\jj i\]i`^\iXek n`cc ZXlj\ Zfdgi\jjfi ]Xlck4 S_\ dflek f] k_\ X[[\[ i\]i`^\iXek j_Xcc Y\ Xj
jg\Z`]`\[ `e k_\ `ejkilZk`fej4
-51-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Cfee\Zk`fe f] i\]i`^\iXek g`g\
Cfe[lZk ]cXi\[ Zfee\Zk`fe nfib kf Zfee\Zk Xcc i\]i`^\iXek g`g\j4
S_\ Zfee\Zk`fe f] `e[ffi le`k g`g\j dljk lj\ [flYc\ jgXee\ij4
S_\ `ejkXcc`e^ kfihl\ j_Xcc Y\ Xj ^`m\e `e k_\ ]fccfn`e^ kXYc\4
Cfee\Zk`e^ g`g\
IejkXcc`e^ kfihl\
N4D4/dd0
/M3d0
s<49;
774> /748b^]3d0
s784=6
:?46 /;46 b^]3d0
DflYc\3jgXee\i
fg\iXk`fe
UXZlld gldg`e^
V`k_ X mXZlld gldg2Zi\Xk\ mXZlld ]ifd k_\ jkfg mXcm\ f] k_\ flk[ffi le`k4
Edgkp`e^ n`k_ i\]i`^\iXek j\Xc\[ `e k_\ flk[ffi le`k `j XYjfclk\cp ]fiY`[[\e4
Ng\e Xcc mXcm\j
Ng\e Xcc k_\ mXcm\j fe k_\ flk[ffi le`k4
GXj c\XbX^\ [\k\Zk`fe
C_\Zb n`k_ X c\XbX^\ [\k\Zkfi fi jfXg nXk\i k_Xk `] k_\i\ `j ^Xj c\XbX^\ Xk k_\ g`g\ Zfee\Zk`fej
Xe[ Yfee\kj4
IejlcXk`fe ki\Xkd\ek
Ng\iXk\ `ejlcXk`fe ki\Xkd\ek fe Yfk_ k_\ ^Xj j`[\ Xe[ c`hl`[ j`[\ f] g`g\j i\jg\Zk`m\cp4
Dli`e^ Zffc`e^ fg\iXk`fe2Yfk_ k_\ c`hl`[ Xe[ ^Xj j`[\j Xi\ Zfc[ Xe[ k_lj j_Xcc Y\ `ejlcXk\[
jf Xj kf Xmf`[ [\n ^\e\iXk`fe4
S_\ `ejlcXk`e^ dXk\i`Xc Xk ^Xj j`[\ j_Xcc Y\ i\j`jkXek kf X k\dg\iXkli\ XYfm\ 786 [\^i\\4
S_\ `e[ffi le`k g`g\ Zfee\Zk`fe gXik j_Xcc Y\ `ejlcXk\[4
S_\ efkZ_ lgnXi[/AkkXZ_\[ [\kX`c m`\n0
F`\c[ g`g`e^ j`[\
Ie[ffi le`k
RlYj`[`Xip `ejlcXk`fe klY\
1??AMMJLQ =M BJGGJP0
Mf4
7
AZZ\jjfip gXikj
Pkp4
V`i\ ZcXdg
8
8
H\Xk
`ejlcXk`fe
j_\Xk_`e^
717
9
RZi\n ZXg
717
-52-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
6. Parts and Functions
AU242FHBIA:
DLU LQOHW
DLU RXWOHW JULOOH
FRPSUHVVRUnLQVLGH RI XQLWo
VWRS YDOYH
AU482FIBIA, AU48NFIBJA:
DLU LQOHW
DLU RXWOHW
FRPSUHVVRUnLQVLGH RI XQLWo
VWRS YDOYH
-53-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
:J[[N\\N ]WR\8
F_RWP UX]^NZ
+9RZ OUX_ MRZNL\RXW LJW KN JMS][\NM K` ][RWP
\QN FI?B> K]\\XW XW \QN ZNVX\N LXW\ZXUUNZ,
CYNZJ\RWP :XW\ZXU DJWNU
9RZ ?WUN\ >ZRUUN
9RZ =RU\NZ
+?W[RMN XO \QN ?WUN\ >ZRUUN,
CYNZJ\RWP :XW\ZXU DJWNU
a ENVX\N ZNLNR^NZ
b :XVYZN[[XZ @JVY
c G?A<E @JVY
:CAD G?A<E
d CD<E9G?CB @JVY
CD<E DCI<E <A<E
e DX_NZ @JVY
a
b
c
d
e
f <VNZPNWL` [_R\LQ
f
Ceiling concealed unit:
IDQnLQVLGHo
PRWRUnLQVLGHo
DLU RXWOHW JLOOH
GUDLQDJH SLSH
JDV SLSH
OLTXLG SLSH
HYDSRUDWRU
-54-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Wall mounted unit:
VLJQDO UHFHLYHU ZLQGRZ
DLU LQOHW JULOOH
2DLH
DLU ILOWHUnLQVLGHo
U
DLU RXWOHW JULOOH
ORXYHU
-55-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
7. Controller functions
7 NQ q|0xw v-,20-**x0 slM`PV
sv sw sx sy sz
su
st
ss
sr
a\i
hj_`
{
z
y
x
\onj
n`hk
PDQ
w
v
s{
mqdib
tr
c`\gnc
t{
^gj^f
m`n
ndh`l
mg``k
ts
tt
tu
tv
tw
tx
ty
tz
ur
PRO
adgn`l l`m`n l`m`n
u
jiOjaa
t
s
QNjiOjaa u322-,
o1xw 2- 230, -,O-yy 3,|2
RNnx+.x0t230x w|1.*t7
SN^*-v~ w|1.*t7
TNn|+x0 jiOjaa w|1.*t7
UNc3+|w|27 w|1.*t7
VN\|0 y|*2x0 v*xt,|,z w|1.*t7
q{x, 2{x0x |1 2-- +3v{ w312 v-**xv2xw -,
2{x t|0 |,*x2L 2{x 5|0x v-,20-**x0 5|** 1{-5
2{|1 w|1.*t7 2- 0x+|,w 2{x31x0 2- v*xt, 2{x
t|0 |,*x2N\y2x0 v*xt,|,z t,w |,12t**t2|-,L
}312 .0x11 2{x t|0 y|*2x0 0x1x2 u322-,N
WNm3.x0Om-y2 -.x0t2|-, w|1.*t7
XNat, 1.xxw w|1.*t7
|
@ihc
g-5 at, hxw at, c|z{ at, \32-
YN\32- m5|,z w|1.*t7
QPNcxt*2{ 12t2x w|1.*t7
QQNa0x1{ t|0 12t2x w|1.*t7
QRNc3+|w|y7|,z 12t2x w|1.*t7
QTNix25-0~ v-,20-* w|1.*t7
QUNq-0~|,z +-wx w|1.*t7
Scf_]b[ @ihc
Bcc`]b[ CY\ia]X]Zm]b[ GYUh]b[ EUb
acXY
cdYfUh]cb cdYfUh]cb cdYfUh]cb
cdYfUh]cb cdYfUh]cb
S]fY
Wcbhfc``Yf
QVN`*xv20|v {xt2|,z w|1.*t7
QWNj.x0t2|-, +-wx u322-,
o1xw 2- 1x2 5-0~|,z +-wxZ
\32-L ^--*|,zL _x{3+|w|y7|,zL
cxt2|,zL at,
QXNat, 1.xxw u322-,
o1xw 2- 1x2 yt, 1.xxwZ g-5
at,L hxw at,L c|z{ at,L \32QYNm5|,z u322-,
o1xw 2- 1x2 \32- m5|,z -0
a|6xw t|0 1x,w|,z w|0xv2|-,
RPNnx+.x0t230x mx22|,z u322-,
o1xw 2- 1x2 2x+.x0t230xL
2x+.x0t230x 0t,zxZ QV ^9SP ^
RQN^*-v~ u322-,
o1xw 2- vt*|u0t2x 2{x 2|+x -y
2|+x0 t,w v*-v~
RRNmx22|,z u322-,
o1xw 2- v-,y|0+
2{x 2|+x -y 2|+x0
t,w v*-v~
RSNm*xx. u322-,
o1xw 2- 1x2 m*xx.
12t2x
RTNn|+x \w}312|,z
u322-,
o1xw 2- tw}312 2{x
2|+x -y 2|+x0 t,w
v*-v~
RUNlx1x2 u322-,
q{x, 2{x 5|0x
v-,20-**x0 t..xt01
tu,-0+t* v-,w|2|-,L
31x t 1{t0.M.-|,2xw
t02|v*x 2- .0x11 2{|1
u322-, 2- +t~x 2{x
5|0x v-,20-**x0
0x13+x ,-0+t*
RVN\|0 a|*2x0 lx1x2 u322-,
\y2x0 v*xt,|,z 2{x
t|0 |,*x2L .0x11 2{|1
u322-,L 2{x 3,|2
vt, 12t02 2- -.x0t2x
RWNn|+x0 u322-,
o1xw 2- 1x2 2{x
+-wx -y 2|+x0
RXNg-v~ 12t2x w|1.*t7
RYNcxt*2{
o1xw 2- v-,20-* 2{x
zx,x0t2|,z -67zx,
y3,v2|-, t,w ,xzt2|4x
|-,My3,v2|-,
SPNlx+-2x v-,20-* 5|,w-5
o1xw 2- 0xvx|4x 2{x
0x+-2x v-,20-* 1|z,t*
QSNm*xx. 12t2x w|1.*t7
i-2xZ QNn{|1 +-wx* w-x1 ,-2 {t4x 2{x y-**-5|,z 0x*t2xw w|1.*t7 t,w y3,v2|-, w x y { ss st sv sx tx
RNn{x -32w--0 3,|2 ,- -67zx,Mut0 y3,v2|-, -0 ,- ,xzt2|4x |-, 3,|2 ,- sr t{ {xt*2{ y3,v2|-, t,w {xt*2{ w|1.*t7N
M]ge^l]neji jb _gj_f
q{x, 230,|,z -, 2{x 3,|2 y-0 2{x y|012 2|+xL 2{x v*-v~ 1{-3*w ux vt*|u0t2xwN n{x +x2{-w -y vt*|u0t2|-, |1Z
QNk0x11 G^*-v~G u322-,L 2{x ^*-v~ w|1.*t7 G \hG G khG 5|** y*t1{N
RNk0x11 -0 2- tw}312 2|+xN a-0 xtv{ .0x11L 2{x 2|+x 5|** |,v0xt1x -0 wxv0xt1x Q +|,32xN dy wx.0x11|,z
2{x u322-,L 2{x 2|+x 5|** |,v0xt1x -0 wxv0xt1x 0t.|w*7N
SN\y2x0 v-,y|0+|,z 2{x 2|+xL .0x11 G mx2G u322-,L G \hG -0 G khG 5|** 12-. y*t1{|,zL2{x v*-v~ 5|** uxz|, 2- 5-0~N
-56-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
lxv-++x,wt2|-,1
o1x ^jjg |, 13++x0N
o1x c`\n |, 5|,2x0N
o1x _ls |, 1.0|,zLt323+, t,w |, wt+. v*|+t2xN
a\i
hj_`
IQJ o,|2 12t02
k0x11 jiOjaa u322-,L 3,|2 12t021N
k0x4|-31 -.x0t2|-, 12t231 t..xt01 -, w|1.*t7
Ii-2 n|+x0 1x22|,zJN k-5x0 |,w|vt2-0 *|z{21 3.N
IRJ mx*xv2 -.x0t2|-, +-wx
k0x11 hj_` u322-,N a-0 xtv{ .0x11L -.x0t2|-,
+-wx v{t,zx1 t1 y-**-51Z
\onj
6
n`hk
c`\gnc
7
m`n
^gj^f
8
ndh`l
\h
mqdib
mg``k
adgn`l l`m`n l`m`n
9
\onj
^jjg
_ls
c`\n
jiOjaa
a\i
o,|2 5|** 03, |, -.x0t2|-, +-wx w|1.*t7xw -,
g^_Nm2-. w|1.*t7 t2 7-30 wx1|0xw +-wxN
ISJ mx*xv2 2x+.N 1x22|,z
k0x11 n`hk u322-,
`4x07 2|+x 2{x u322-, |1 .0x11xwL 2x+.N 1x22|,z
|,v0xt1x1 Q ^N
dy u322-, |1 ~x.2 wx.0x11xwL 2x+.N1x22|,z 5|**
|,v0xt1x /3|v~*7N
`4x07 2|+x 2{x u322-, |1 .0x11xwL 2x+.N 1x22|,z
wxv0xt1x1 Q ^N
dy u322-, |1 ~x.2 wx.0x11xwL 2x+.N 1x22|,z 5|**
wxv0xt1x /3|v~*7N
o,|2 5|** 12t02 03,,|,z 2- 0xtv{ 2{x 2x+.N 1x22|,z
-, g^_N
ITJ at, 1.xxw 1x*xv2|-,
k0x11 a\i u322-,N a-0 xtv{ .0x11L
yt, 1.xxw v{t,zx1 t1 y-**-51Z
@RQM
q|0xw v-,20-**x0
gj
hd
lx+-2x v-,20-**x0
gj
hd
cdb
cdb
5
o,|2 03,1 t2 2{x 1.xxw w|1.*t7xw -, g^_Nd,
c`\n +-wxL 5t0+ t|0 5|** u*-5 -32 ty2x0 t
1{-02 .x0|-w -y 2|+x w3x 2- v-*wMw0ty2 .0x4x,2|-,
y3,v2|-,N
d, _ls +-wxL 5{x, 0--+ 2x+.N uxv-+x1 R ^
{|z{x0 2{t, 2x+.N 1x22|,zL 3,|2 5|** 03, |,2x0+|22xM
,2*7 t2 gjq 1.xxw 0xzt0w*x11 -y a\i 1x22|,zN
IUJ o,|2 12-.
k0x11 jiOjaa u322-,N
j,*7 2|+x t,w 0--+ 2x+. 0x+t|,1 -, g^_N
\** |,w|vt2-01 z- -32N
px02|vt* y*t. v*-1x1 t32-+t2|vt**7N
c|,21
q|0x v-,20-**x0 vt, +x+-0|8x xtv{ -.x0t2|-,
12t231N
q{x, 12t02|,z |2 ,x62 2|+xL }312 .0x11 jiOjaa
u322-, t,w 3,|2 5|** 03, |, .0x4|-31 12t231N
\on
\on
x
.
*
\32- 03,,|,zZ _30|,z 2{x \32- 03,,|,z +-wxL t|0 v-,w|2|-,|,z 03,,|,z t,w vt, t32-M1x*xv2 2{x
v--*|,zL{xt2|,zL yt, +-wx tvv-0w|,z 2- 2{x 0--+ 2x+.x0t230xN
at, 03,,|,zZ n{x \^ -,*7 {t4x t|0 13..*7 03,,|,z ,- v--*|,z t,w {xt2|,z 03,,|,z t2 2{x v-,w|2|-,L
\^ vt,H2 {t4x t32- t|0 13..*7 03,,|,zL t,w vt,H2 w|1.*t7 2{x 1x22|,z 2x+.x0t230x 4t*3x -, 2{x g^_N
_30|,z 2{x {xt2|,z 03,,|,zL ty2x0 12t02 2{x \^L |, -0wx0 2- .0x4x,2 v--*xw t|0L \^ vt, 12-. y-0 t
5{|*x uxy-0x 1x,w {xt2 t|0N
_30|,z 2{x wx{3+|y|vt2|-, 03,,|,zL 5{x, 2{x 0--+ 2x+.N 1x22|,z 2x+.N L ,-2 1x22|,z v-,w|2|-,
tvv-0w|,z 2- 2{x t|0 1.xxwN
-57-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Yan Mgj_f _jlla_ngq ^abjla mn]lneic Zehal jkal]nejiC
s-3 vt, *x2 3,|2 12t02 -0 12-. t32-+t2|vt**7 t2 y-**-5|,z 2|+xZ ]xy-0x
7-3 5t~x 3. |, 2{x +-0,|,zL -0 zx2 utv~ y0-+ -321|wx -0 ty2x0 7-3
yt** t1*xx. t2 ,|z{2N
ndh`l jiOjaa
@DAKbnal oien mn]lnB maga_n qjol
`amela` jkal]neji hj`aC
j.x0t2|-, +-wx 5|** ux w|1.*t7xw
-, g^_Nk-5x0 |,w|vt2-0 *|z{21 3.N
@EAZRTOX hj`a maga_neji
k0x11 ndh`l u322-, 2- v{t,zx
ndh`l +-wxN`4x07 2|+x 2{x
u322-, |1 .0x11xwL w|1.*t7
v{t,zx1 t1 y-**-51Z
ML
MEE
ML
MEE
hj_`
a\i
mqdib
n`hk
c`\gnc
^gj^f
m`n
6 ndh`l
m`n
mg``k
o
ML
\h
V`Ub_
\h
mx*xv2 7-30 wx1|0xw ndh`l +-wx
Iji -0 jaaJ
8
7
adgn`l l`m`n ODPDQ
jiOjaa
5
@FAZehal manneic
k0x11 ndh`
u322-,N
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-58-
Commercial Air Conditioner
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-59-
Commercial Air Conditioner
Model: AU242FHBIA,
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Commercial Air Conditioner
Model: AU242FHBIA,
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-61-
Commercial Air Conditioner
Model: AU242FHBIA,
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mqdib
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Model: AU242FHBIA,
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-67-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
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-68-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
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-69-
9
6
8
7
5
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
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-70-
I>C ><J
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
8. Electrical Control Functions
8.1 Outdoor control principle:
No
1
Item
AU242FHBIA
1. Startup period in cooling
mode: high
2. Cool, Dry mode:
ƽCurrent state is Fan OFF
mode:
TC˚21ć: low speed
ƽ Current state is low
speed:
TC˚30ć, med speed
TC˘15ć, fan off
ƽ Current state is med
speed:
TC˚42ć, high speed
TC˘22ć, low speed
ƽ Current state is high
speed:
TC ˘ 39 Current state is
Fan motor
med speed:
control
AU482FIBIA
AU48NFIBJA
1. Startup period in cooling 1. Startup period in cooling
mode:
mode: high
TA˚16ć, high speed
2. Cool, Dry mode:
ƽ Current state is Fan OFF TAİ16ć, low speed
mode:
2. Cool, Dry mode:
TC˚37ć: low speed
ƽTA˚32ć, high speed
ƽCurrent state is low speed: ƽ15ćİTA˘31ć:
TC˚50ć, med speed
TC˚45ć, high speed
TC˘30ć, fan off
40 ć ˘ TC ˘ 44 ć , med
ƽCurrent state is med speed: speed
TC˚47ć, high speed
TC˘39ć, low speed
TC˘40ć, low speed
ƽTA˘15ć:
ƽCurrent state is high speed: TC˘30ć, fan off
TC˘41ć, med speed
TC˚50ć, low speed
ƽIn low speed:
ƽIn low speed:
TC˘40ć, lower fan off
TC˘36ć, lower fan off
TC˚42ć, lower fan startup
TC˚38ć, lower fan startup
1. Startup
period
in
heating:
TAı20ć, low speed
1. Startup period in heating:
TA˘20ć, high speed
High speed
1. Startup period in heating:
2. Running state in
2. Running state in heating:ƽ
High speed
heating:
TA˚17ć
2. Running state in heating:
ƽTA˚17ć:
running units capacity İ
ƽTA˚17ć
running units capacityİ1
running units capacityİ
1HP, low speed will be ON
HP, low speed will be ON
and OFF in turns.
1HP, low speed will be
and OFF in turns.
ƽOther condition:
ON and OFF in turns.
running units capacity ˚
TE˘7ć, high speed
ƽOther condition:
1HP, low speed
TE˚10ć, low speed
TE˘7ć, high speed
ƽ 17 ć ˚ TA ˚ 15 ć , low
3. TE˚14ć, lower fan off
TE˚10ć, low speed
speed
TE˘12, lower fan startup
ƽ 14 ć ˚ TA ˚ 10 ć , med
speed
ƽTA˘9ć, high speed
2
EEV
In COOL, DRY, DEFROST state, EEV will open fully with 480 pulse.
-71-
Commercial Air Conditioner
control
3
4
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
In heating mode, EEV will be adjusted due to the overheating value: SH= TS-TC
1. Adjust range: according to the compressor frequency, min open angle of EEV will be
different: high frequency, 120; med frequency, 110; low frequency, 90; the max open
angle: 470/350
2. Overheating modification: according to the discharging temperature, modify the
overheating value, when Td>100ć, overheating value will decrease 2 at the standard
overheating value; when Td İ 70 ć , overheating value will add 2 at the standard
overheating value
1. Secure operation conditions of 4-way valve:
ƽ After the outdoor receives the heating signal from indoor unit, if the 4-way valve is
not electrified before the compressor starts up, the unit will enter the 4-way valve
secure operation.
ƽ After defrosting is over, the unit will enter the 4-way valve secure operation.
2. 4-way valve secure operation control:
4-way ƽ In heating mode, After the outdoor receives the startup signal from indoor unit, the
valve compressor will start up, (fan motor shutoff, EEV close) and when the frequency rises up
secure to 50Hz for 10 seconds, 4-way valve will reverse (meanwhile, fan motor will enter the
operation target speed, EEV enters the open angle of soft startup) and the unit enters soft startup
period.
ƽ In defrosting, when the defrost condition is met, the compressor frequency will
decrease to 50Hz, 4-way valve will reverse (meanwhile, fan motor will enter the target
speed) and the unit enters soft startup period.
3. 4-way valve control in OFF state:
4-way valve will close after compressor stops for 30 minutes.
1. Enter condition: when compressor runs for 45 minutes in
all in heating mode, by checking TE and TA, if the below
conditions can be met for continuous 5 minutes, the unit
will enter defrosting operation: TEİChTAˉ¢, herein,
Defrosting
ƽC˖TA˘0ć, C=0.8; TAı0ć, C=0.6
control
ƽ¢˖set as 12˄L˅,10˄M˅,8˄H˅ according to the
actual condition. At the easily defrosting place, set as H; at
the not-easy-defrosting place, set as L; when out of factory,
set as M
ƽTemperature limitation: -15ćEİTEİ2ćE
-72-
1. Enter
condition:
when
compressor
runs for 45 minutes
in all in heating
mode, by checking
TE and TA, if the
below conditions can
be
met
for
continuous
5
minutes, the unit will
enter
defrosting
operation:
ƽWhen Ta˘2ć, TA-TE
ı9ć for continuous 2
minutes; or Te ˘ -12 ć
for continuous 5 minutes;
ƽWhen Taı2ć, Te˘-5
ć for continuous 5
minutes;
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
2. Defrosting control:
When defrosting condition is met, compressor frequency will go down to the min.
frequency, and 4-way valve will be powered off and turn into cooling mode (fan motor off,
EEV in soft startup open angle); compressor frequency rises up to 78Hz and begins to
defrosting operation.
3. Quit condition:
ƽTE is over 7ć for 60 seconds in all or is up to 12ć, defrosting is over;
ƽDefrosting accumulative time is up to 10 minutes, defrosting is over.
5
Electric
heater
control
1. When TAİ27ć, if the compressor stops running, electric heater will be electrified;
2. When TAı27ć, or when compressor starts up, electric heater will be off; and temp.
difference is 5ć.
6
1. To balance pressure: it will open 1 minute before compressor starts up, and keep open
Unloading
in soft startup period after compressor starts up until the soft startup is over; in the
remaining operation and 10 minutes later after shutoff, SV1 will open;
valve SV1
control 2. Improve low pressure: in heating mode, when (TCǃTSǃTE)min. valueİ-13ć SV1
open, temp. difference is 3ć.
7
Spray
Adjust the SV2 according to the discharging temperature:
valve SV2
when TDı115ć, SV2 will open; when TDİ110ć, SV2 will close.
control
High pressure switch protection:
ƽWhen input level of pressure switch is 1, it shows there is no protection.
ƽWhen input level of pressure switch is 0 for a while, it shows high pressure beginning;
compressor stops and the unit alarms. The alarm can be resumable, the unit will alarm in
3 minutes when compressor is standby.
8
Pressure Low pressure switch protection:
switch ƽWhen input level of pressure switch is 1, it shows there is no protection.
control ƽ When compressor is running, if low pressure switch has acted for 3 minutes
continuously, the unit will alarm. When compressor stops, if low pressure switch has acted
for 30 seconds continuously, the unit will alarm. When compressor starts up, low pressure
switch will be shielded within 3 minutes.
ƽIn defrosting and in 6 minutes after defrosting is over, low pressure switch will be
shielded.
-73-
Commercial Air Conditioner
9
Compress
or capacity
output
control
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
In cooling mode, frequency will be calculated according to
the horse power of the running indoor units:
1. Every indoor unit will confirm 8 capacity codes
according to the difference between the set temperature
and the ambient temperature; then add all the capacity
code of the running indoor unit.
2. Divide the outdoor capacity into 13 capacity classes due
to the frequency; every capacity class is corresponding
with the different indoor capacity code; modify the relative
indoor capacity code due to the different ambient
temperature;
3. Compressor will confirm its target frequency according
to the sum of indoor capacity code;
Cooling target frequency
will be confirmed due to the
indoor running horse power
and the outdoor ambient
temperature:
F=C1(P-C2)+C3(T-35)+C4
Herein: C1=22, C2=160,
C3=64, C4=4200;
Heating target frequency will be confirmed due to the indoor running horse power and the
outdoor ambient temperature:
F=C1(P-C2)+C3(7-T)+C4+C5(C6-TZ)
Herein: C1=16; C2=160; C3=32; C4=4500; C5=300; C6=45.
-74-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
8.2 Indoor electric control functions:
No
1
Control
item
AE*FCBKA
AS*FCBHA
AB*FCBIA
In cooling mode, the adjustment by the over heating: SH= TC1(gas
pipe)-TC2˄liquid pipe˅
1. Adjust range: min. angle: 60/65, max. angle: 470/350˄data will take
EEPROM as standard˅
2. Overheat modification: according to the discharging temperature, modify
the overheat state, if Td > 100 ć, the overheat value will add 2 degree at the
base of standard degree;
3. Open modification: when EEV is at min. angle, the unit will measure the
difference between Tliquid and Ta at the interval of 5 minutes, if the
EEV control difference is within 5 degree, the valve will be back to base open angle and
modify the open angle due to the overheat state
In heating mode, adjust the open angle according to the conformity of liquid
pipe temperature.
1. Adjust range: indoor unit startup, min open angle: 100, max open angle:
470; indoor unit standby: open angle: 60.
2. The indoor EEV open angle will depend on the temperature difference
between indoor liquid pipe temp. and average liquid temp. of all running
indoor units. (if lower than average temp., the valve will open; if high than
average temp., the valve will close.
2
Anti-freeze control in cooling mode:
ƔWhen liquid pipe temp. is below 7 degree for 40 minutes, or when liquid
pipe temp. is below 4 degree for 10 minute, the unit will enter anti-freeze
function. At this time, the current indoor EEV will close, and the fan motor will
turn into low speed from the current speed.
ƔAfter the anti-freeze function has worked for 10 minutes, and liquid pipe
temp. is over 7 degree, the unit will quit anti-freeze control (take the data in
Fan motor
EEPROM as standard).
control
Anti-cold air control in heating mode:
ƔWhen liquid pipe temp. is below 33 degree, indoor fan speed will turn into
low speed from the set speed; when liquid pipe temp. is below 25 degree,
indoor motor will stop.
ƔWhen liquid pipe temp. is over 30 degree, indoor fan speed will turn into low
speed from stop; when liquid pipe temp. is over 35 degree, indoor motor will
enter the set speed (take the data in EEPROM as standard).
-75-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
8.3 Temperature compensation adjustment (only for indoor unit with new PCB-AB**FCBIA):
For infrared control type unit, the temperature compensation can be adjusted. But for wired control
type unit, there is no temperature compensation.
Set the EEPROM by SWING (or SLEEP) button. For example:
Infrared control—in heating mode, press “ON/OFF” button to switch on the unit. Take the 24 degree
set temperature as the base point, press SWING (SLEEP) within 5 seconds, it will sound 2 times,
the unit will enter the heating temperature compensation mode, at this time, if you set the
temperature to 25 degree and switch off, the temperature compensation will be +1 degree; if you
set the temperature to 26 degree and switch off, the temperature compensation will be +2 degree,
and so on, the max. compensation can be +6 degree ( 30 degree); if you want to cancel the
compensation, adjust the temperature back to 24 degree.
Infrared control—in cooling mode, press “ON/OFF” button to switch on the unit. Take the 24 degree
set temperature as the base point, press SWING (SLEEP) within 5 seconds, the unit will enter the
cooling temperature compensation mode, at this time, if you set the temperature to 23 degree and
switch off, the temperature compensation will be -1 degree; if you set the temperature to 22 degree
and switch off, the temperature compensation will be -2 degree, and so on, the max. compensation
can be -8 degree ( 16 degree); if you want to cancel the compensation, adjust the temperature back
to 24 degree.
Read the temperature compensation value:
Infrared control type—change to cooling mode, the set temperature is 30 degree, in high speed.
Press SWING (SLEEP) 7 times within 5 seconds, the running LED will flash as the current temp.
compensation value.
Infrared control type—change to heating mode, the set temperature is 16 degree, in high speed.
Press SWING (SLEEP) 7 times within 5 seconds, the running LED will flash as the current temp.
compensation value.
8.4 Unit debugging:
1. Confirm indoor unit quantity
After the unit is electrified, you can check the indoor unit quantity by the outdoor dip switch or the
testing board. The display quantity must be in accordance with the actual quantity. If not, please
check if there is repeated unit No. or if the dip switch is broken, and if the communication wire is
connected correctly.
2. Confirm indoor EEV
FAQ:
2.1 The EEV communication wire is not in accordance with the indoor unit. If all the indoors are
running, the operation will be normal; when the only one indoor unit is running and it can not cool,
while the EEV of the unit not running opens.
2.2 The live wire and the neutral wire of the EEV power cable is not in accordance with those of
indoor unit power cable, E7 failure occurs.
2.3 The coil temperature sensor is not in original place or not fixed well, which cause EEV not work
properly. The efficiency will be bad or outdoor unit will be liquid return.
-76-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Only No.1 unit in cooling
If the refrigerant of the unit not running not
flow—if yes
If No.1 unit in cooling
Switch on all the indoor units in turn
If No. 1 unit in cooling—if yes, OK
If not
Short connect the corresponding terminal,
open the EEV compulsorily. If it can open,
check if the EEV communication wire is in
accordance with that of indoor unit and modify.
If the refrigerant flows, check if the EEV
communication wire is in accordance
with that of indoor unit and modify.
If yes
Can’t open
Check if EEV is installed properly, tap the EEV body, or reset.
Still not
Replace EEV PCB
Still not
Replace EEV
-77-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
3. Confirm cooling operation
start
Once outdoor stops, the unit
Set the unit in cooling mode and begin to run
must run again 2 minutes
and a half later.
If indoor unit blows cold air
Confirm compressor state
Confirm the louver direction
If air circulation is OK
Make all indoor units running
If temp. drop between air outlet/indlet is normal
If the operation voltage is OK
Check power voltage and power
(230Vf10ˁ˅
circuit.
If the running current is 15% of the
nominal value (at max. frequency)
Check indoor/outdoor temp.
Check
piping
length
and
refrigerant charge.
Check
If working pressure is normal
noise
normal
-78-
compressor
running
frequency and if there is abnormal
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
4. Confirm heating operation
start
Set the unit in heating mode and begin to run
Once outdoor stops, the unit
can work only 2 minutes
and a half later
If blowing warm air?
Confirm compressor state
If air circulation is OK
Confirm the louver direction
Make all indoor unit running
If temp. drop between air outlet/indlet is normal
If the operation voltage is OK
Check power voltage and power
˄230Vˇ10ˁ˅
circuit.
If the running current is 15% of the
nominal value (at max. frequency)
Check indoor/outdoor temp.
Check
piping
length
and
refrigerant charge.
Check
If working pressure is normal
frequency
compressor
and
abnormal noise
normal
-79-
if
running
there
is
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
8.5 PCB information
AU242FHBIA PCB circuit diagram:
1
2
3
CN21
CN9
CN6
CN22
CN23
жÔØ
CN35
CN10
4
Ñõ°É
CN8
CN7
ÅçÉä
5
6
7
8
CN4
ËÄͨ
¼ÓÈÈ´ø
·ç»ú
+5V
D
D
+12V
C6
R4
100
R9
100
PFC_OUT
C14
103
+5V
C4
RL9
JQ-1A
RL2
JQ-1A
RL3
JQ-1A
RL4
JQ-1A
RL5
JQ-1A
RL6
R87
JQ-1 2K
RL1
RL7
JQ-1A
JQ-1
3
4
5
RL8
JTN1AS
R77
2K
R86
10K
R78
2K
R79
CP250
J7
+12V
SV2
J8
R80
2K
JP1
JP2
11
10
14
13
12
15
16
17
18
5
4051IN
DOWN
1
6(5,$/
9
)B83
2
2
3
)B'2:1
)$1B6:
3:0B=
0,'
4
5
3:0B:
:$<
3:0B9
1&B*1'
8
9
1&
3:0B8
10
+($7(5
(55
560
AC2_IN
11
12
13
7( R401K
14
R411K
15
7$ R421K
16
76 R431K
17
7&R441K
18
7'
CD21
4.7UF
CD22
4.7UF
+5V
CD23
4.7UF
RA2
RA-4(10KX4)
R17 20K
R21 20K
R23 20K
CD25
R20
4.7UF
20K
R34
1K
R22
20K
GND
Td
10K
$9&&
7;B287
$95
&6
$966
6.
,30
',
R11
100
+5V
'&567
LOWV
309B$
R12
C43
30
104
31
CX1 10MHz
1
14
2
13
C23
104
IC9
PST600D
100K
C19
103
3
P44
P04
P45
P03
P46
P02
P47
P01
VSS
P00
8
9
7
6
5
TEST
21
VDD
HPRE_SW
C44
104
RA1
RA-4(10KX4)
GND
5
34
LPRE_SW
45
CJ1
LED4 R99
TX_OUT
10K
GND1
RED
2
43
3
GND
33
8
C23
104
GND
R31
10K
30
ZD6
5.6V
CD4 CD6
100UF
100UF
10K
CN13
$
10
%
10K
IC10
CD5 CD7
100UF100UF
DQ4
ZD3
9013
5.6V
R65
9
R68
10K
31
ZD5
5.6V
CD2
1UF
R69
4.7K
PST600D
C
ZD4
5.6V
GND
29SERIAL
28
+5V
1
27
GND
+5V
C26 104 8
2
7
3
6
CN27
XP-9A
R63 R45
10K 10K
26
+5V
4
GND
5
24C02IC6
R47
10K
22SDA
+5V
+5V
8
7
IC7
93C46
4
6
B
C27
104
5
309B&
R67
+5V
40
R66
10K
CN3
T1
T28051
10K
39
GND
38
+5V
37
02'
309B'
02'
3(1*6(
;,1
3)&B287
+12V
C30
104
;287
3)&B,1
*1'
1&
PFC_OUT
33
PFC_IN
CD18
GND
VD8
4148
AC1_INR48
4148
1
2
3
4
IC13
CD10
100UF
R565.6K
ICE2A165
CD11
100UF
VD17
FR102
VD20
HER204
+12V
R15
180K
27
CT_IN
CD13
C15 100UF
103
IC4
ULN2003
R55
5.6K
FR102
VD21
R8
C29
104
R36
CD1
5
6
VD16 R545.6K
VD11
VD1
1K
CD9
100UF
FR102
FR102
FR106
+5V
7
CD8
100UF
VD12
R71
10
C48
220UF 104
CN2
R53
5.6K
VD15
CD3
10UF
34
VD14
FR102
R2
C2
47K/2W 472
18V
7805
35
32
R3
560K/1W
ZD2
IC11
7805
36
8
9
7
9013
44
GND
8
CN19
DQ3
J6 J5 J4 J3
46
10
7
11
R70
4.7K
R64
+5V
11
6
6
+5V
32
1K
C21103
12
TMP86FH46N
12
IC8
4011
351007B
P22
P21
13
5
GND
R1010K
R32
25COM_LED
560
P20
LED2
RED
24
R46
_RST
10K
23 SCL
XIN
GND
4
C20103
309B%
1&B*1'
,17
28
GND
P05
14
4
41
HIV
7;B,1
V-IN
R6210K
P43
XOUT
42
567
VD7
4148
P06
20
'2
29
R35 VD6
1K 4148
C18103
P07
P42
19
47
Ts
27
DQ1
8550
P41
3
104
48
Ta
23
R18
P15
55
51
104 22
26
P40
15
49
21
25
TX_IN
P14
54
50
24
+5V
18
CX2 16.0MHz
GND
AVSS
+12V 2
GND
+5V
Te
1
2
3
4
5
CD24
4.7UF
B
C46
17
57
52
Pd(NOP)
20
+5V
16
4051S3
GND
58
56
53
IC1
MB89P857
$&B,1
7F
19
15
4051S2
&23+($7
$&B&203
AC1_IN
CN14
14
4051S1
59
P13
6
LED3
RED
13
595RCK
AVDD
GND
37FR1007
361007A
7
GND
R30
GND
12
595SCK
CD17
16V/100UF
LOW
7
CA1
C28
104
GND
3&7
3:0B;
1000PF*8
62
61
60
3:0B<
6
+5V
11
595SI
P12
5
SERIAL
R29330
10
+5V
GND
63
P11
VREF
C11
MM1007
16
R85100
38FR857
8
CN5
R28330
64
9
P37
TX_IN
R96
100K
,6
1&
'5$,1
R26330
R27330
104
GND
1
2
3
4
5
GND
C
2
SW06
1
UP
CD14
16V/100UF
8
P10
R95
2K
+5V
IC3
C47
101
1
TX_OUT
R84100
39TO857
C10104
SW04
R94
2K
% E
B B
2
2 $
%
'
' 1
1
, ,
' '
GND
R25330
GND
C49
3
R24330
6
7
SW07
4
CN1
IC5
ULN2803
P36
GND
SW05
R93
2K START
40JP1
$
B
2
'
&
1
4
+5V
R50 R51
R88 10K 10K
10K
P30
42
41
D
B
2
'
&
1
9013
C36
104
C22
103
9013
C25
104
P31
9
'
1
*
+5V
P32
P34
P35
JP2
CN34
DQ6
C24
103
CN16
P33
104
C12104
R14100K
1
&
,
9
3
H,C
GND
DQ5
2
SS/TEST
STOP
1
,
&
1
HPRE_SW
R98
1K
R13100K
R92
2K
&
1
2
'
LPRE_SW
R97
1K
R39
1K
+5V
IC2
1
HEAT
R81
100K
GND
R38
1K
CN26
GND
CN24
COOL
2K
+5V
+5V
GND
C13
CN25
62)7 *1'
)% 9&&
1
CT2
472
472
803
CT_IN
560
1K
103
R83
R72
1K
10K
R91
10K
+5V
C5
FDG_1 561
CD15
100UF
1
1
2
2
ZEN2
C1
C42
VD9 R82
4148 3K
AC2_IN
+5V
+5V
CP250
CN12
R73
PFC_IN R75
9
CT1
803
CN30
GND
C8
103
C7
103
C9
103
2
5
4
3
R19
100
CN11
R74
10K
C45 104
PTC1
C3
0.47UF
R5
100
3
T38003
GND
CN31
0.47UF
2.2UF
L1
4
ZEN1
561
CP250
R37
1K
R6
2
SGND
R7
2
HER204
IC12
ZD1 R1
11V
471
R76 CD12
5.6K 1000UF
TLP421
GND
16
15
14
13
12
9
11
GND
GND
CD20
100UFVD22
SV2
CD16
16V/100UF
10
SGND
+12V
A
A
FR102
CN32
CN15
Title
Size
Number
Revision
A2
1
2
3
4
5
-80-
6
7
Date:
3-Sep-2005
File:
C:\Documents and Settings\dupeng\
Drawn
\ᴼᑇথ䖛ᴹⱘ݇Ѣ80ⱘ᥻
Ḡ䴶By:
Sheet
of
8
Commercial Air Conditioner
AU482FHBIA PCB circuit diagram:
-81-
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AU48NFIBJA PCB circuit diagram:
1
2
3
4
5
6
8
7
+5V
+5V
R304
100¦¸
100¦¸
R306
TXD1
C326
22uF
RXD1
IC303D
109
11
P3.2
R305
IC303E
74HC14
+5V
R329
4.7k
RESET
8
R332
R334
10k¦¸
IC303F
13
12
4.7k
4148
74HC14
+5V
R331
10k¦¸
D311
14
R328
100k¦¸
C330
D313
4148
D312
4148
471
7
+5V
R301 R302 R303
6 - 1N4148 D301 D302 D303 4.7k 4.7k 4.7k
+5V
+5V
SK CN302
TXD
RXD1
GND2
3
4
ÏÔʾ¹¤×°
5
+5V
74HC14
Z301
QP301
PNP_3906
R333
1k¦¸
3V
CN105
100¦¸
XH5-5Ȯ
D304 D305 D306 C302 C303 C304
471 471 471
D
+5V
R308
4.7k
RXD0
+5V
P0.0
P0.7
104
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
Z303
Z305
NPN_2222A
QN302
IC309
9
NPN_2222A
10
11
12
+5V
R311100k¦¸
C311204
C312204
13
14
R312
15
100k¦¸
16
d_outb
D_INA
D_OUTB
D_INB
D_OUTANC
8
7
5
Vcc
GND
4
IN2
Vin
IN1
NC
3
+12V
2
1
54
55
56
57
58
59
60
61
62
P2.1
63
64
65
P2.2
66
P2.3
67
P2.7
68
69
70
P2.4
71
P2.5
72
73
74
P0.5
P0.4
P0.3
P0.2
P0.1
P0.0
P2.4
6
d_outa NC
NC D_OUT
P2.3
+5V
P2.2
R326
2.7k¦¸
R327
MM1007
P2.1
2.7k¦¸
XH2-2½ðÉ«
5
R313
R314
10k¦¸/1%
XH2-2ÂÌ
C320
P0.7
+5V 104
C313
472
6
7
8
DO
GND
ORGDI
DC SK
VCCCS
4 P2.7
P3.0
P3.1
32 P3.2
31 P3.3
30 P3.4
29 P3.5
28 P3.6
27 P3.7
26
25
24
23
22
21
20
19
18
17
16 +5V
15
14
13
12
R315
P0.5
C314
472
C321
C322
30pF
30pF
P3.1
C329
105
XH2-2°×
R317
R318
10k¦¸/1%
270¦¸
P0.4
4148
2
1
D318
4148
2
74HC14
7
IC304F
12
13
IC306B
6
CN315
+5V
Ts 1
2
XH2-2ºÚ
270¦¸
74HC14
IC304D
8
R321
R322
10k¦¸/1%
270¦¸
74HC14
IC305C
P0.3
5
C316
472
+5V
P0.2
R323
R324
47k¦¸/1%
270¦¸
P0.1
C318
472
+12V 1
+5V 2
+5VA3
GND 4
GNDA
5
LED301
LED_GREEN
C331
104
74HC14
+5V
C301
47uF
13
R325
470¦¸
XH5-5°×
IC305F
12
74HC14
7
XH2-2˦
8
1
2
3
4
5
6
7
8
9
IC307
OUT 1
IN 1
OUT 2
IN 2
OUT 3
IN 3
OUT 4
IN 4
OUT 5
IN 5
OUT 6
IN 6
OUT 7
IN 7
OUT 8
IN 8
DIODE CLAMP
GND
C332
ULN2803A
18
17
16
15
14
13
12
11
10
CN310
+12V
1 +12V
2 A
3 B
4 C
5 D
6
XH6-6½ðÉ«
+12V
μç×ÓÅòÕÍ·§PMV
CN305
1
2
3
4
5
6
7
8
9
IC308
OUT 1
IN 1
OUT 2
IN 2
OUT 3
IN 3
OUT 4
IN 4
OUT 5
IN 5
OUT 6
IN 6
OUT 7
IN 7
OUT 8
IN 8
DIODE CLAMP
GND
C333
ULN2803A
18
17
16
15
14
13
12
11
10
+12V
1
2
3
4
5
6
7
8
9
10
11
12
13
ALM
P0.6
XH13-13°×É«
CN203
74HC14
IC305A
74HC14
IC304C
Title
6
5
74HC14
Size
A2
Date:
File:
3
4
5
-82-
A
2
1
2
GND
W_P
HEAT
SV1
SV2
4_WAY
Ox_P
F_M_R
F_L
F_H
GND
OU
Vs
104
10
A
1
B
104
IC305E
11
CN309
SPRY
1 Vo
2 GND
3 +12V
4
XH4-4°×
74HC14
IC305D
9
+12V
C334
104
4
+5V
+12V +5V+5VA
CN301
CN316
+5V
Td 1
2
6
3
CN202
R349
10k¦¸/1% 10k¦¸/1%
74HC14
IC305B
C317
472
XH2-2°×
5
R348
+12V
CN308
+12V
1 FAN1
C335
2
104
XH2-2°×
CN307
+12V
1 FAN2
2
R347
IC304E
10
11
+12V
3
LM324
74HC14
C315
472
R319
R320
10k¦¸/1%
IC306A
2
10k¦¸/1% R346
+12V
10k¦¸/1%
+5V 74HC14
C324
104
LM324
1
R345
IC304B
4
3
14
XH2-2Ȯ
LED302
D317
9
CN314
+5V
Ta 1
2
R352
330¦¸
P3.7
4
74HC14
IC303A
+5V
RA302
+5V
RAA09103
C323
471
JP301
JUMPER
LED_RED
IC303B
ALM
CN313
+5V
Te 1
2
C
PNP_3906
R344
2.7k¦¸
IC304A
RAA09103
QP302
R350
4.7k
R343 P3.3
2.2k¦¸
4148
6
1
B30116MHz
R351
10k¦¸
R342
1k¦¸/1%
D316
R339
74HC14
+5V
2 P3.4
1
+5V
10
IC303C
3
R341
8.2k¦¸/1%
9
LM324
270¦¸
C328
472
5
RA303
3 P2.5
P0.0
12
LM324
IC306C
8
OP
XH2-2dzȮ
13
7
R316
10k¦¸/1%
270¦¸
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
D315
4148
R3378.2k¦¸
RAA09103
RA301
14
4148
1
2
R340
1k¦¸/1%
74HC14
93C66
CN312
+5V
Tt 1
2
B
270¦¸
IC302
NC
P3.0/AD00
P3.1/AD01
P3.2/AD02
P3.3/AD03
P3.4/AD04
P3.5/AD05
P3.6/AD06
P3.7/AD07
NC
NC
P4.0/AD08
P4.1/AD09
P4.2/AD10
P4.3/AD11
P4.4/AD12
NC
P4.5/AD13
Vcc
P4.6/AD14
P4.7/AD15
75
76
77
78
79
80
81
82
83
84
1
2
3
4
5
6
7
8
9
10
11
+5V
+5VCN311
Tsink 1
2
p0.6/a6/t1clk/pm.2
ANGND
Vref
P0.5/A5/PM.1
P0.4/A4/PM.0
P0.3/A3
P0.2/A2
P0.1/A1
P0.0/A0
NC
P2.0/EPA0/PVER
P2.1/SCLK0/BCLK0/PALE
NC
NC
P2.2/EPA1/PROG
P2.3/COMP3
P2.7/SCLK1/BCLK1
NC
NC
P2.4
P2.5
+5V
IC306D
14
Z304
N87C196MH
Z302
NPN_2222A
IC301
4 - Z_5.6V
QN301
DACN304
DB
1
2
HBS
XH2-2ºì
R338
p0.7/a7/t1dir/pm.3
p1.0/txd0
p1.1/rxd0
NC
NC
P1.2/TXD1
P1.3/RXD1
P6.0/WG1
P6.1/WG1
P6.2/WG2
Vss
P6.3/WG2
P6.4/WG3
P6.5/WG3
Vcc
NC
Vss
EA
NC
NMI
RESET
C308
100uF
QN303
10k¦¸
100uF
P2.6/COMP2/CPVER
P6.7/PWM1
P6.6/PWM0
NC
NC
NC
XTAL2
XTAL1
Vss
EXTINT
P5.4
P5.6/READY
P5.1/INST
Vss
P5.0/ALE
Vpp
P5.3/RD
P5.5/BHE
NC
P5.2
P5.7
C310
100uF
D314
RESET
OH
CN318
P3.5
R336
10k¦¸
TXD1
RXD1
GUN
GUP
GVN
GVP
GWN
GWP
C319
C307
+5V
104
ALM
TXD0
RXD0
100uF
1
2
XH2-2ÒøÉ«
+5V
+5VA
C309
CN317
P3.6
C325
1
2
C306
471
11
100¦¸
D310 C305
471
XH9-9°×
TXD0
100¦¸
D309
C
103
P3.4
P3.2
P3.0
R309
R310
R335220¦¸
C327
4
10k¦¸/1%
R307
D308 4.7k
4 - 1N4148 D307
R330 4.7k
+5V
+5V
SK CN303
TXD1
RXD2
GND3
4
5
485ͨѶ
XH5-5˦
D
CN306
TRIP
GUP
GVP
GWP
GUN
GVN
GWN
ALM
GND
GUP 1
GVP 2
GWP 3
GUN 4
GVN 5
GWN 6
ALM 7
8
9
6
7
º£¶ûKR-160W/(BP)S¿ØÖÆ
Number
A00000013Revision V1.0
11-Aug-2004
Sheet of
C:\Documents and Settings\shibin\×ÀÃæ\KR-160~2.DDB
Drawn By:
8
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
8.6 Dip switch and the ports on PCB functions
AU242FHBIA ports on PCB:
Ports
Ports name
Wiring method
CN1
IPM-OUT CN2
IPM-POWER
CN3
+310V ,GND
CN4
Fan motor port
To fan motor
CN5
SERIAL
857 detecting serial port
CN6
Four-way valve port
To four-way valve
CN7
Live line of electric heater
To live line
CN8
Neutral line of electric
heater
To neutral line
CN9
Live line of power source
To live line
CN10
Neutral line of power
source
To neutral line
CN11
Live line of power source
To live line
CN12
Earthing line
To earthing line
CN13
Communication port
To communication line
CN14
Sensor port
Including defrosting, discharging, ambient, air
return, evaporating temp. sensors
CN15
EEV port
To EEV
CN16
High pressure switch port
To high pressure switch
CN19
SERIAL
846 detecting serial port, no used
CN22
Spray valve port
To spray valve
CN23
Oxygen generator port
IPM output control line
To 4-way 15V power source
To 310V DC power source
To oxygen generator (optional)
CN27
Indicator board
To exterior testing device, showing failure code
CN30
Compressor current
detecting
To compressor current detecting board
CN32
+15VˈGND
————
CN34
Low pressure switch port
To compressor low pressure switch
CN35
Unloading port
To unloading valve
-83-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AU48NFIBJA PCB ports name and functions
Ports
Ports name
Wiring method
R, S, T
Power supply ports
To power of 3 PH, 380V, 50Hz
U, V, W
Compressor ports
To motor (pay attention to phase sequence)
E
Grounded port
Grounding (less than 10Ȧ;more thanȻ1.6mm)
N
Neutral wire port
If 3 phase, it is connected to neutral wire; if 1
phase, it is blank.
L1, L2
Reactance port
To wire of reactance (non-polar)
CN102
Current transducer port
To current transducer
CN211, CN212
Fan motor port
To fan motor
CN205
Water pump port
To water pump (be spare)
CN206
Electric heater port
To electric heater
CN207
Solenoid valve port
To solenoid valve
CN208
Solenoid valve port
To solenoid valve
CN209
Four-way valve port
To four-way valve
CN210
Oxygen generator port
To oxygen generator (blank temporarily)
CN303
Testing board port
To testing board. Used to modify, check data for
after sale personnel.
CN304
Communication port
To C1, C2 of communication block
CN307, CN308
Fan motor port for dispersing
heat
To fan motor for dispersing heat (be spare)
CN310
EEV port
To outdoor electronic expansion valve
CN311
Radiator temp. sensor port
To radiator temp. sensor (blank temporarily)
CN312
Mid-condenser
port
To mid-condenser temp. sensor
CN313
Defrosting temp. sensor port
To defrosting temp. sensor
CN314
Ambient temp. sensor port
To ambient temp. sensor
CN315
Suction temp. sensor port
To compressor suction temp. sensor
CN316
Discharging temp. sensor port
To discharging temp. sensor
CN317
Low pressure switch port
To low pressure switch
CN318
High pressure switch port
To high pressure switch
temp.
sensor
-84-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Below we will comment for the functions of some ports and some changes of PCB
0010451530 and 0010451531:
1. Control Board 0010451530
Herein, the control board we are concerned is the board without CPU. Functions for every port are as
follows:
CN301: port for power supply, connected with CN202 of the power board.
CN302: connected to testing board.
CN303: connected to the computer serial port through the testing device.
CN304: HBUS communication port.
CN305: the driving port for relay, connected to CN203 of the power board.
CN306: the driving port for IPM, connected to CN105 of the power board.
CN307, CN308: port for the heat-emitting fan. No used at present.
CN309: port for the main relay and for testing current, connected to CN104 of the power board.
CN310: the driving port for electronic expansion valve.
CN311: testing port for the radiator temperature. No used at present.
CN312: testing port for the coil temperature Tt.
CN313: testing port for the defrosting temperature Te.
CN314: testing port for the outdoor ambient temperature Ta.
CN315: testing port for the suction temperature Ts.
CN316: testing port for the discharging temperature Td.
CN317: port for the signal of compressor overheat protection initially,but now for low pressure switch.
CN318: port for the signal of high/low pressure protection,but now only for high pressure switch.
Control board 1
Control board 2
Control board 3
Totally there are 3 types of control board, because they have different appearance, you will distinguish them
much easier.
Control board 1 is the earliest edition, because this board is rather big and it will cover the fixing screw
which supports the electric control box, also taken into consideration the convenient installation and service,
we modified and designed the Control board 2.
Control board 2 is the second edition, because there are electric parts on both sides of this board, and
-85-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
hard to be installed, we designed the Control board 3.
Contro l boa rd 3: the current edition. Now the part number of control PCB is 0010451971
instead of 0010451530.
The new control board(0010451971) also can be used as 0010451530,but the connector
"OH" must be shorted.
2. Pow er board 0010451531
There are two types of power board, and they have the same dimensions, but have the different voltage
testing parts. That is easy to distinguish.
The newly power board adopts the voltage sensor to test the voltage. On the board there is a black square
type voltage sensor. The old board adopted the LM331 to test the voltage, which is an inserted part IC with
8 feet.
However both the new or old power boards can match any of the control board, but the CPU diagrams are
different.
3. Fil ter board 0010451536
Originally, the electric control box has not any filter board. In order to avoid the exterior interference and
result in the bad communication, the second edition (current edition) are all added the filter board.
-86-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
8.7 Testing board for AU48NFIBJA:
Press button “mode”, the display will change over in the following sequence:
State
Frequency
Current output
Voltage on DC side
Ambient temp
Discharging temp
Suction temp
Defrosting temp
Coil temp
Indoor unit quantity
Open degree of EEV
Display
Fxx.xx
A xx.x
U xxx
1 xx
2 xx
3 xx
4 xx
5 xx
6 xx
7 xxx
5XQ
6WRS 'HIU &RRO +HDW
5XQ
&RRO
+HDW
3URJ
6WRS
0RGH
(QWHU
Note: Please connect the wire on power off. Insert the testing board on the CN302 of the
outdoor PCB. The part number is 0010451601.
In addition, we set a testing port CN303 which can be connected to the computer through
another testing device (part number: 0010451800). The distributor can get the testing device
and the testing software from us.
Testing procedure:
1. After the unit powered off, connect the wire of testing board to CN302 port, and then pull
down the communication wire between outdoor and indoor unit.
2. Check if the wiring is right. If yes, power on the outdoor unit.
3. On the operation panel of the testing board, the relative data can be modified.
4. Press “Prog.”, enter data editing mode.
5. Set data “Pr-00” as “0”ˈthen data can be edited. Press “Enter” to confirm.
6. The other data can be set according to the requirement like this way.
7. After all the data be modified, set “Pr-00” as “1”.
8. Press “Prog.”, quit out of data editing mode.
9. Note: Data of the chip is very important, the improper modification will cause the main
parts damaged such as compressor. So before modification, please contact with us.
10. After quitting from data editing mode, operation board will display “P r.E” which will
to reset
flash. After 3 minutes, it will display “b.P.160”. At this time, pressing the
the program.
11. After reset, power off the outdoor. For 1~2 minutes, the outdoor release all the electricity,
plug the communication wire between outdoor and indoor to the original position, the
modification is over.
-87-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
8.8 AU482FIBHA: function specification of SW01, SW02, SW04, SW05, SW06, SW07
Table 1
SW01 SW02
Display of 7 segments LED (LD1,LD2,LD3)
0
0
FFF shows capability overloading (if capability overloading function is chose)
Outdoor diagnosis code
when without diagnosis code, display: - 1
Outdoor running mode
cooling: C
heating: H
defrosting: J
2
Defrosting area set: display 1------shows that L is set at “12”
display 2------shows that L is set at “10”
display 3------shows that L is set at “8”
When the following condition is available, the unit enters into defrosting running:
(TE: defrosting temp., TA: ambient temp.)
TEİChTAˉ¢
Note˖C˖TA˘0ćˈC=0.8
TAı0ćˈC=0.6
The value of ¢ can be set according to the selection of jump wiring:
selection of jump wiring
L
M
H
12e
10e
8e
¢(ć)
4
INV command frequency˄decimalism˅ e.g.120 stands for 120HZ
5
INV receiving frequency˄decimalism˅ e.g. 84 stands for 84HZ
6
Quantity of indoor units connected˄decimalism˅ e.g. 6 stands for 6 indoor units
7
Back up running: TS sensor: 1 ,
TE sensor: 1
This function is preset and not available.
8
9
13
14
15
1
0
1
2
3
4
5
6
7
8
9
10
Back up running: TA sensor: 1 ,
mid-section temp. sensor: 1
This function is preset and not available.
Back up running: PD sensor: 1 ,
PS sensor: 1
This function is preset and not available.
Display compensation of capacity class: 4------class 4, 6-----class 6
After the start-up of system is over, the frequency of compressor has gotten the
target frequency confirmed by the request of indoor unit capacity for 5 minutes,
and then the unit will modulate the capacity.
(Note: class 4 and class 6 can be selected. Class 4 is that the capacity class
whose range is from 4 classes higher to 3 classes lower than the target frequency.
Class 6 is that the capacity class whose range is from 6 classes higher to 4
classes lower than the target frequency. For the unit without pressure sensors,
there is no this function.)
Display “U” shows that indefinite capacity is chose
Display “d” shows that definite capacity is chose (indoor total capacity can’t be
over 130%˅
Display o1-----stands for HP
Display o2-----stands for HP
Display H1-----shows that can be connected with central communication
TD sensor data˄decimalism˅
TA sensor data˄decimalism˅
TS sensor data˄decimalism˅
TE sensor data˄decimalism˅
Mid-section of coil pipe sensor data (decimalism)
Pd sensor data˄display corresponding saturation temperature˅
Ps sensor data˄display corresponding saturation temperature˅
Opening degree of outdoor PMV1˄decimalism˅
Opening degree of outdoor PMV2˄decialism˅
2-way valve switched on: SV ON˖ 1ˈno switched on: -Outdoor running current (decimalism)
-88-
Commercial Air Conditioner
2
3
11
12
13
14
0
1
2
3
4
5
6
7
8
9
10
11
0—7
8
4
5
0—15
0—15
6
7
8
0—15
0—15
0—15
9
10
11
12
13
1—16
1—16
1—16
1—16
1—16
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Outdoor fan mode :_1˄low speed˅,_2˄med speed˅,_3˄high speed˅
Temperature sensor ON display
ON˖ 1ˈOFF˖-Four-way valve switched on: ON˖ 1 Four-way valve not switched on: OFF˖_ _
Running mode selection
cooling˖ C, heating: H
Dispatch line check
cooling˖CC --this function is preset
Dispatch line check
heating˖HH--this function is preset
Cool trial run˖ C --this function is preset
Heat trial run: H --this function is preset
Swing trial run: _F--this function is preset
Indoor unit uniform start/stop˖run: 11/stop: 00˄display -- after 3 minutes˅
--this function is preset
Clean abnormal function: CL--this function is preset
Outdoor PMV1fully openǃclose function: fully open: FF, fully close: 00
Outdoor PMV2 fully openǃclose function: fully open: FF, fully close: 00
Indoor PMV fully openǃclose function˖fully open: FF
Outdoor rated setting: -F
Indoor communication state: receiving normal˖ 1 receiving abnormal:
Display quantity of communicating indoor unit, e.g. : 6 shows that 6 indoor units
are working.
Indoor diagnosis code, no diagnosis code:
--this function is preset
Indoor HP
new code:0 stands for 0.8HP, 1 stands for 1HP, 2 stands for 1.2HP,
3 stands for 1.5HP, 4 stands for 2HP, 5 stands for 2.5HP, 6 stands for 3HP, 7
stands for 4HP
Old code: 1 stands for 1HP,7 stands for 7HP
Indoor required capacity (decimalism) indoor P-CODE
Indoor PMV opening degree (decimalism)
Indoor saturation temperature (decimalism) -26.0—67.0˄account according to
outdoor suction pressure PS˅
Indoor sensor TA temperature˄decimalism˅-26.0—67.0
Indoor sensor TC2 temperature˄indoor gas pipe˅˄decimalism˅-26.0—100.0
Indoor sensor TC1 temperature˄indoor liquid pipe˅˄decimalism˅-26.0—100.0
Single cool trial run--this function is preset
Single heat trial run--this function is preset
Combination control with outdoor switches
Table 2
function
summary
Cool trial run
Indoor trial run in cooling
mode, the function is the
same as trial run with remote
controller, the indoor unit
which trials run fixes the temp.
difference as max. temp., and
send it to outdoor, the other
control is similar with normal.
Heat trial run
Indoor trial run in heating
mode, the function is the
same as trial run with remote
controller, the indoor unit
which trials run fixes the temp.
difference
as
max.
Method of set, cancel
[set]
SW01“2”, SW02“03”, press SW04 for more
than 2 seconds, after set of trial run success, LD
will always display –C until the function is
cancelled.
[cancel]
in trial run state, SW01“02”, SW02“03”, press
SW05
[set]
SW01“2”, SW02“04”, press SW04 for more than
4 seconds, after set of trial run success, LD will
always display –H until the function is cancelled.
[cancel]
in trial run state, SW01“02”, SW02“03”, press
-89-
Commercial Air Conditioner
Swing trial run
temperature, and send it to
outdoor, the other control is
similar with normal.
Indoor trial run in swing
mode,the control is the same
as swing trial run with remote
controller.
Uniform running
Indoor is uniform running
The indoor running mode is
corresponding with the setting
or
memory
of
remote
controller.
Uniform stop
Indoor uniform stops
Indoor
PMV
fully
open
compelled
Indoor
PMV
fully
compelled in 2 minutes
Rated running
Set the unit rated running
Outdoor PMV1
fully
open,
closed function
Outdoor PMV1 compelled fully
open or close in 2 minutes
open
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
SW05
[set]
SW01“02”, SW02“05”, press SW04 for more than
2 seconds, after set of trial run success, LD will
always display –F until the function is cancelled.
[cancel]
in trial run state, SW01“02”, SW02“05”, press
SW05
[set]
SW01“02”, SW02“05”, press SW04 for more than
2 seconds, after set of trial run success, LD will
display FF for 5 seconds.
[cancel]
cancel according to operation of remote
controller
[set]
SW01“02”, SW02“06”, press SW05 for 2
seconds, after set success, LD will display FF for
5 seconds.
[cancel]
cancel according to operation of remote
controller
[set]
SW01“2”, SW02“10”, press SW04 for more than
2 seconds
[confirmation]
in 2 minutes, 7-segment LED of base board I/F
will display “FF” all the time
[cancel]
the control software will recover PMV to normal
open degree after 2 minutes ˄ after indoor
software receives the signal of fully open from
outdoor, PMV will fully open only in 2 minutes.˅
[set]
SW01“02”, SW02“11”, press SW05 for more than
2 seconds, after setting success, LD will display
–F, shows that the unit may enter rated running
mode, afterwards you can set SW06,
SW07.SW06 is used for increasing frequency,
while SW07 is used for decreasing frequency.
[cancel]
cancel according to operation of remote
controller
[set]
SW01“3”, SW02“9”, press SW04 for more than 2
seconds
[confirmation]
in 2 minutes, 7-segment LED of base board I/F
will display “FF” all the time
[cancel]
the control software will recover PMV to normal
open degree after 2 minutes ˄ after indoor
software receives the signal of fully open from
outdoor, PMV will fully open only in 2 minutes.˅
-90-
Commercial Air Conditioner
Outdoor PMV2
fully
open,
closed function
Outdoor PMV2 compelled fully
open or close in 2 minutes
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
[set]
SW01“3”, SW02“10”, press SW04 for more than
2 seconds
[confirmation]
in 2 minutes, 7-segment LED of base board I/F
will display “FF” all the time
[cancel]
the control software will recover PMV to normal
open degree after 2 minutes ˄ after indoor
software receives the signal of fully open from
outdoor, PMV will fully open only in 2 minutes.˅
2. Specification for SW03
The two switches of SW03 should be ON or OFF at the same time.
-91-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
8.9 Sensor characteristic
model
AU482FIBIA
AU48NFIBJA
AB092FCBIA
AB142FCBIA
AB182FCBIA
AE072FCBKA
AE092FCBKA
AE122FCBKA
AE142FCBKA
AE182FCBKA
AE242FCBKA
AS072FCBHA
AS092FCBHA
AS122FCBHA
AS142FCBHA
AS182FCBHA
AF092FCBHA
AF122FCBHA
sensor number
sensor name
sub-sensor number
0010450192
outdoor ambient temp. sensor
001A3800082
0010450193
suction temp. sensor
001A3800093
0010450194
defrosting temp. sensor
001A3800093
0010450195
mid-condenser temp. sensor
001A3800093
0010450196
compressor discharging temp. sensor
001A3800096
0010450194
defrosting temp. sensor
001A3800093
0010451328
pipe temp. sensor
001A3800093
0010451511
discharging temp. sensor
001A3800096
0010451513
suction temp. sensor
001A3800093
0010451514
ambiet temp. sensor
001A3800082
0010450699
pipe temp. sensor
001A3900004
0010451327
ambiet temp. sensor
001A3900003
0010450699
pipe temp. sensor
001A3900004
R25=10Kȍ±3%
B25/50=3700K±3%
001A3800103
liquid pipe temp. sensor
001A3900004
R25=10Kȍ±3%
B25/50=3700K±3%
coil temp. sensor
001A3900003
001A3900004
1.R25=10Kȍ±3%
B25/50=3700K±3%
2.R25=23Kȍ±2.5%
B25/50=4200K±3%
001A3900059
-92-
characteristic
R25=10Kȍ±3%
B25/50=3700K±3%
R25=10Kȍ±3%
B25/50=3700K±3%
R25=10Kȍ±3%
B25/50=3700K±3%
R25=10Kȍ±3%
B25/50=3700K±3%
R80=50Kȍ±3%
B25/80=4450K±3%
R25=10Kȍ±3%
B25/50=3700K±3%
R25=10Kȍ±3%
B25/50=3700K±4%
R80=50Kȍ±3%
B25/80=4450K±3%
R25=10Kȍ±3%
B25/50=3700K±4%
R25=10Kȍ±3%
B25/50=3700K±3%
R25=10Kȍ±3%
B25/50=3700K±3%
R25=23Kȍ±2.5%
B25/50=4200K±3%
Commercial Air Conditioner
R80=50Kȍ±3%
B25/80=4450K±3%
T(ć)
-30
-29
-28
-27
-26
-25
-24
-23
-22
-21
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Rnom(Kȍ)
11600
10860
10170
9529
8932
8375
7856
7372
6920
6498
6104
5736
5392
5071
4770
4488
4225
3978
3747
3531
3328
3138
2960
2793
2636
2489
2351
2221
2099
1984
1877
1775
1680
1590
1506
1426
1351
1280
1214
1151
1092
1036
983.2
933.4
886.4
841.9
800
760.8
722.8
687.3
653.8
622
592
553.6
R80=50Kȍ±3%
B25/80=4450K±3%
T(ć)
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
R25=10Kȍ±3%
B25/50=3700K±3%
Rnom(Kȍ)
T(ć)
Rnom(Kȍ)
536.6
511.1
486.9
464
442.3
421.7
402.1
383.6
366
349.3
333.5
318.4
304.1
290.5
277.6
265.3
253.6
242.5
232
221.9
212.3
203.2
194.5
186.3
178.4
170.9
163.7
155.9
150.4
144.2
138.3
132.7
127.3
122.1
117.2
112.5
108
103.8
99.68
-20ć
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
90.79
85.72
80.96
76.51
72.33
68.41
64.73
61.27
58.02
54.97
52.1
49.4
46.86
44.46
42.21
40.08
38.08
36.19
34.41
32.73
31.14
29.64
28.22
26.4
25.61
24.41
23.27
22.2
21.18
20.21
19.3
18.43
17.61
16.83
16.09
15.38
14.71
14.08
13.48
12.9
12.36
11.84
11.34
10.87
10.43
10
9.59
9.21
8.84
8.48
8.15
7.83
7.52
7.23
-93-
R25=10Kȍ±3%
B25/50=3700K±3%
T(ć)
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
Rnom(Kȍ)
6.95
6.68
5.43
5.6
5.59
5.73
5.52
5.32
5.12
4.93
4.9
4.58
4.42
4.26
4.11
3.97
3.83
3.7
3.57
3.45
3.33
3.22
3.11
3.11
2.9
2.81
2.72
2.63
2.54
2.49
2.38
2.3
2.23
2.16
2.09
2.03
1.96
1.9
1.85
1.79
1.73
1.68
1.63
1.58
1.54
1.49
1.45
Commercial Air Conditioner
R25=23Kȍ±2.5%
B25/50=4200K±3%
R25=23Kȍ±2.5%
B25/50=4200K±3%
T(ć)
Rnom(Kȍ)
T(ć)
Rnom(Kȍ)
-20ć
281.34
24ć
24.12
-19ć
263.56
25ć
23
-18ć
247.04
26ć
21.94
-17ć
231.66
27ć
20.94
-16ć
217.35
28ć
19.99
-15ć
204.02
29ć
19.09
-14ć
191.61
30ć
18.23
-13ć
180.04
31ć
17.42
-12ć
169.24
32ć
16.65
-11ć
159.17
33ć
15.92
-10ć
149.77
34ć
15.22
-9ć
140.99
35ć
14.56
-8ć
132.78
36ć
13.93
-7ć
125.11
37ć
13.34
-6ć
117.93
38ć
12.77
-5ć
111.22
39ć
12.23
-4ć
104.93
40ć
11.71
-3ć
99.04
41ć
11.22
-2ć
93.52
42ć
10.76
-1ć
88.35
43ć
10.31
0ć
83.5
44ć
9.89
1ć
78.94
45ć
9.49
2ć
74.67
46ć
9.1
3ć
70.65
47ć
8.74
4ć
66.88
48ć
8.39
5ć
63.33
49ć
8.05
6ć
60
50ć
7.73
7ć
56.86
51ć
7.43
8ć
53.91
52ć
7.14
9ć
51.13
53ć
6.86
10ć
48.51
54ć
6.6
11ć
46.04
55ć
6.34
12ć
43.72
56ć
6.1
13ć
41.52
57ć
5.87
14ć
39.45
58ć
5.65
15ć
37.5
59ć
5.44
16ć
35.66
60ć
5.24
17ć
33.92
18ć
32.27
19ć
30.72
20ć
29.25
21ć
27.86
22ć
26.54
23ć
25.3
-94-
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
9. Wiring diagram
AU242FHBIA Wiring diagram:
OUTDOOR UNIT WIRING DIAGRAM
Compressor
Spray
Valve
4-Way
Valve
Crankcase Fan Motor
Heater
M
Oxygen
Generator
CN3 CN7 CN8
CN22
CN6
CN4
N CN101
L1
B
Y/G
Control Board
CN2
Y/G
CN12
Connected To Indoor
Communication Wire
CN21
COM NO
U
B
Power Supply
1PH,220v-230V~,50Hz
CN11
IPM
R
CN13
RL1
CN1
CN102
W
R
1PH,220v-230V~,50Hz
OR
BL
Indoor unit
Power Supply
R
V
W
Y/G
W
CN10
PTC
P
CN9
CN23
F3.15A/250V
CT
Parts in dashed frame are
optional.
M
Fan
Motor
Capacitor
BL
B
Defrost Temp. Sensor
Discharge Temp. Sensor
Ambient Temp. Sensor
Suction Temp. Sensor
Mid-Condensor Temp.Sensor
W
CN14
Y
CN16
CN30
CN15
CN34
R
Electrolytic
Capacitor
2500­F/400V
ˇ
ˉ
ˇ
ˉ
Electrolytic
Capacitor
100­F/400V
M
High-pressure
Switch
B
B
Low-pressure
Switch
Electronic expansion Valve
B:Black
BL:Blue
BR:Brown
R:Red
W:White
Y:Yellow
OR:Orange
Y/G:Yellow/Green
Reactor
Rectifier
25A/600V
Rectifier
50A/600V
B
AU482FIBIA Wiring diagram:
Capacitor
High Voltage Control
Board
Te
Ta Td
6:
6: 6:
Fuse
Fan
Capacitor
R R
AC Motor A
6SUD\
9DOYH
W
B
Earthing
Y/G
W
W
Electrolytic
Capacitor
W
Y/G
W
B
B
W
1
/
&
&
Fan
Capacitor
AC Motor B
To indoor uint
R
4-Way Unloading
Crankcase Oxygen
valve Valve
Generator
Heater
CT
B
W
B
B
/RZ3UHVVXUH
6ZLWFK
+LJK3UHVVXUH
6ZLWFK
'HIURVW
7HPS
6HQVRU
&RPSUHVVRU
9HQW
6HQVRU
$PELHQW
7HPSHUDWXUH
6HQVRU
&RPSUHVVRU
,QKDOH
6HQVRU
3LSH
7HPSHUDWXUH
6HQVRU
0
EEV
CN2 L
CN1 N
/' /' /'
Ts
Current
Detecor
6: 6:
Tc
B
W
R
Power Supply
B
AC Contactor
R
R
Resistance
-95-
B
Rectifier
Reactor
Electrolytic
Capacitor
1.Parts in dashed
frame are optional
2.B:Black
R:Red
W:White
Y/G:Yellow/Green
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AU48NFIBJA wiring diagram:
4-WAY
OX-P
SV2
CRANKCASE
HEART
SV1
FM3
FM4
0010577105
W-P
CN210
3 2 1
CN210
3 2 1
RY206
CN208
CN207
CN206
CN205
3 2 1
3 2 1
3 2 1
3 2 1
RY205
RY204
RY203
RY202
RY201
CN202
Fan capacitor
CF1
5
4
3
2
1
FAN1
RY208
Power Supply Board
5
4
3
2
1
FAN2
SCLD-P-B-4PDT-C
1
2
3
4
5
6
CN203 7
8
9
10
11
12
13
RY207
CN212
1 2 3 4 5
1
CN1
CN3 2
3
1
2
3 CN302
4
5
RY209
CN211
CF2 Fan capacitor
1 2 3 4 5
1
CN303
2
3 CN301
4
5
1
2
3
4
5
T3.15A/250VAC
1
2
CN2 3
4
5
CN204
CN201
2019 16 1512 11 8 7 4 1
3 2 1
1 2
CN308
1 2
CN307
1 2
JP301
CN311
CN312
Control Board
CN313
1
2
CN314
1
2
CN315
CN316
1
2
3
4
5
6
7 CN305
8
9
10
11
12
CN306
13
1 2 3 4 5 6 7 8 9
CN309
1 2 3 4
1
2
1
2
1
2
1
2
CN317
1
2
CN318
1
2
CN310
1
2
3
4
5
CN304
TSINK
Tt
Te
Ta
Ts
Td
0H(L)
0P(H)
1 2
Remarks:
L
N
1. CN302 ǃ CN303 areports for
controllers,and will be used in maintenance.
2. Parts in dashed frame are optional.
1 2 3 4 5 6 7 8 9
CN105
2019 16 1512 11 8 7 4 1
CN103
Symbols meaning
symbol
part name
part name
symbol
CM
compressor
Te defrosing temp. sensor
FM
fan motor
Ta ambient temp. sensor
OX-P oxygen bar function
Ts suction temp. sensor
Td discharging temp. sensor
4-WAY 4-way valve
SV
solenoid valve
0H Low pressure switch
0P High pressure switch
HEAT crankcase heater
EEV Electronic expansion valve
W-P water pump
CT current transducer
TSINK radiator temp. sensor
mid-condenser temp. sensor
Tt
C101 C102 C103
R101
N
U
C104 C105 C106
PTC
R114
IPM
P
V
L2
W
()
(+)
RY101
RECTIFIER
()
() ()
1
1
2 CN107 2
3 CN104 3
4
Noise Filter
Color symbol:
symbol
B
BL
R
C1 C2
W
Y
G
Communication Y/G
Anti-surge relay
CT
U
R
V
W
W
R
S
T
N
Lm1 Lm2
B
Power Supply
CM
symbol
black
blue
red
white
yellow
green
yellow/green
Y/G
Y/G
AB**2FCBIA wiring diagram:
Indoor unit wiring diagram
M
M
electronic
expansion valve
Builtin EEV type
1
2 3 4 5 6
2 3 4
CN6
sw02
1
CN11
CN
2
serial
CN16
CN9
Indoor control board
sw03
emergency
LED1 switch
LED2
LED3
10 9 8 7 6 5 4 3 2
1
OPER BEEP1 POW
COMP TIM
sw01
Remote receiver
CN13
CN1
4 3 2 1
d b ac
2
R
1
CN4
CN7
3 2 1
3 2 1
C
CN19
R
pump motor
D
CN20
Attentions:
The CN9 is not available . So the second bit of SW03
is must be set "ON",And CN19,CN22 is not available.
CN16 is a serial communication port for service.
negative ion generator or high
voltage accumulator
outdoor
communication
W B R
<*
electronic
expansion valve
box power supply
and communication
Wired control type
The dip switch setting when out of factory
Outside EEV type
indoor power
B:Black
BL:Blue
BR:Brown
R:Red
W:White
Y/G:Yellow/Green
CN22
Wired controller and remote receiver only can be chosen
one of type at will.
The setting of SW01,SW02 and SW03 :
1.The former three bits of SW01 are used to set unit
number,which are operated by the installer on field .
2.The fourth bit of SW01 is used to choose different
indoor fan speed in heating mode."ON"means that fan
speed can be set as middle and low level,"OFF"means
that fan speed can be set as high,middle and low level.
3.The first bit of SW02 and SW03 is used to choose
wired control type or remote control type.
"ON"means that the unit with wired controller(other parts
are as the same as remote control unit). And "OFF"is
remote controller.
The unit with wired controller can make remote operation
on wired controller with remote controller such as YR-H71 .
4.The second bit of SW02 is used to choose built-in or
outside electronic expansion valve setting .
"ON"means built-in type : CN6 is connected with electronic
expansion valve and indoor unit control refrigerant flow itself.
"OFF"means outside type: CN25 is connected with
electronic expansion valve communication,and the electronic
expansion valve box(MP3A) control indoor refrigerant flow.
M
Wired controller
B
CN18
unit code setting
CN14
Remote control type
A
CN25
FUSE
T3.15A/250VAC
1
LED4
2 3 4 5 6 7 8 9 10
sw01
In the diagram,gas pipe temp. sensor,liquid pipe temp.
sensor,room temp.sensor ,indoor fan motor,float switch,
pump motor,swing motor are necessary parts;
Wired controller,remote receiver,electronic expansion
valve are parts matched with the model(combined usage);
negative ion generator or high voltage accumulator
are optional parts for health and comfort˄combined usage).
CN5
1
1 2
2 3
2
1
float switch
Room temp. sensor
4 3 2 1
CN8
1
liquid pipe temp. sensor
fan motor
5
2 3 4 5
CN3
0010577029
About the PCB setting
swing motor
1
gas pipe temp. sensor
M
fan capacitor
1PH.220-230V~.50Hz
NOTE˖Must connect electronic expansion valve box
power and communication from corresponding
indoor,wiring sequence must correspond with
the label respectively,other wise, will cause
PCB of indoor and electronic expansion valve
box not work and damaged.
-96-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AE**2FCBKA wiring diagram:
0010573324
Indoor unit wiring diagram
M
electronic
expansion valve
NOTE:The dashed " ˉˉˉ "in indoor controll board is
PCB inner wiring.
for built-in EEV type
BL
2 3 4
1
gas pipe temp. sensor
CN6
temperate
CN9water
sensor
CN5
1
2
2 3
CN8
CN17
1
1
liquid pipe temp. sensor
BL
1
2 3 4 5 6
2 3
2
CN11
1
transformer
1
ambient temp.
sensor
CN24
CN23
unit code setting
CN16
CN15
2
CN25 BR
Indoor control board
1
CN13
CN18 W
FUSE
T3.15A/250VAC
RL7 RL6
RL5
RL4
RL3
RL2
CN22
RL1
CN14
1
2 3 4
receive display PCB
choice of remote
controller type
serial
1
2
1
2 3 4 5 6 7 8 9 10
1
CN1
1
SW1
10 9 8 7 6 5 4 3 2
LED3 LED2 LED1
2
2
float switch
indoor temp
sensor
1 2
CN2
CN1
CN10
2 1
choice of wired
controller type
R
CN4
7 6 5 4 3 2 1
B
C
CN12
3 2 1
CN19
Y/G
M
connector
M
D
CN3
CN20
3 2 1
1 2
B
fan
capacitor
A
CN7
3 2 1
R
R
R
M
earthing
pump motor
swing motor
Attentions: The water temp sensor (CN9) and indoor
temp sensor (CN24) are unuseful now. The fourth bit
of 4 position dial switch is used to choose the
different speed of indoor fan under heating mode.
"ON" means that the speed of indoor can be choosed
from middle and low."OFF" means that the speed of
indoor fan can be choosed from high,middle and low.
indoor fan motor
negative ion generator or
high voltage accumulator
resumable heat
protector
80ćˈ10A/250VAC
wired controller
electronic
expansion valve
box power supply
and communication
outdoor
communication
auxiliary heater
SW1
FUSE
T15A/250VAC
indoor power
NOTE˖Must connect electronic expansion valve box
power and communication from corresponding
1PH.220-230V~.50Hz
indoor,wiring sequence must correspond with
the label respectively,other wise, will cause
PCB of indoor and electronic expansion valve
box not work and damaged.
About control board outer connector:
In the diagram,gas pipe temp. sensor,liquid pipe
temp. sensor,indoor fan motor,transformer are
necessary parts˗Wired controller,receive
display,electronic expansion valve,float
switch,pump motor,swing motor are parts matched
with the model(combined usage ˅˗ Auxiliary
electric heater,negative ion generator,high voltage
accumulator are optional parts for health and
comfort˄combination usage arbitrarily).Wired
controller and receive display only can choose one
at will.
The unit with remote controller is matched with
receive display:
1.Ceiling concealed type:CN11 must be short
connected with a jump wire ˗
2.Duct type ˖connected with float switch and
pump motor ˗
3.Cassette type:connected with float switch ǃ
pump motor and swing motor ˗
4.Cabinet type:CN11 must be short connected
with a jump wireˈconnected with swing motor ˗
The unit with wired controller(equipped with wired
controllerˈcan make remote operation on wired
controller with remote controller such as YR-H39) ˖
Short connect CN15 ǃCN17 together with jump
wireˈother parts are the same as remote control unit
Setting method with electronic expansion valve outside:
CN23 is disconnected,CN25 is connected with electronic
expansion valve communication,and the electronic
expansion valve box(MP3 or MP2) control indoor
refrigerant flow.
˖ valve:
Setting method with built-in electronic expansion
CN23 is short connected with a jump wire, CN6 is
connected with electronic expansion valve ˈand
indoor unit control refrigerant flow itself.
one-off heat protector
105ćˈ10A/250VAC
only applicable for unit with
auxiliary electric heater
CN23
CN15
CN17
short connector for built-in
electronic expansion valve
short connector for wired
controller
CN16
serial communication port
CN11
connector for float switch
LED3
indicator ˄runningˉred˅
LED2
indicator ˄timer ˉyellow˅
LED1
indicator ˄power ˉgreen˅
RL7
emergency switch(ON/OFF)
indoor fan motor low-speed relay
RL6
indoor fan motor Mid-speed relay
RL5
indoor fan motor High-speed relay
RL4
health function module relay
RL3
pump motor relay
RL2
swing motor relay
RL1
auxiliary eletric heater relay
B:Black
BL:Blue
BR:Brown
R:Red
W:White
Y/G:Yellow/Green
AS**2FCBHA wiring diagram:
0010573625
VIEW A
TRANSFORMER
1
Display Bar
M
CN2
CN13
CN11
R
W
CN10
CN1
XB1
3
FAN MOTOR
R
W
B
Y/G
2
TO
ELECTROMAGNETIC
VALVE BOX
4
VIEW A
CN12
XB2
SW2
Control Board
SW01
CN14
ON
CN7
OFF
CN8
EMERGENCY SWITCH
LIQUID PIPE TEMP.
SENSOR
ROOM TEMP. SENSOR
GAS PIPE TEMP.
SENSOR
CN5
M
CN6
STEPPING MOTOR
EARTHING
R: RED
B: BLACK
W: WHITE
BL: BLUE
BR: BROWN
Y/G: YELLOW/GREEN
Note:
W
B
1.SW01 is the dip switch to set
N
L
unit number.
2CN6 is a serial port for some
Power Supply
device.
1PH,220-230v~,50Hz
-97-
Y/G
Earthing
Wire
C1
R
C2
R
Communication
Wire
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
MP3A wiring diagram:
MP3A wiring diagram
0010577068
FUSE T3.15A/250VAC
CN1
CN2
Control board
CN3
electronic
expansion
valve3
M
electronic
expansion
valve2
M
CN4
CN7
CN5
CN8
CN9
6
5
4
3
2
1
6
5
4
3
2
1
CN15
CN6
1
CN14
2
SERIAL
CN6
CN10
CN11
CN12
CN13
65 43 21
electronic
expansion
valve1
M
B W BR B W BR B W BR
L1 N1 C1 L2 N2 C2 L3 N3 C3
Y/G
indoor 3
indoor 1
indoor 2
B:Black
BR:Brown
W:White
Y/G:Yellow/ Green
NOTE: Power supply and communication wire must be connected with the corresponding indoor units.Wiring sequence must be
correspondent respectively,L and N must not be connected reversely,otherwise, it will cause the unit not work and demaged.
On running, "indoor 1" must be electrified always, or air conditioner does not work normally.When the system is equipped with MP2A,
the installer should use the corresponding two-way electronic expansion valve communication wiring and its driver port .
-98-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
10. Failure code and troubleshooting
10.1 Outdoor failure code:
AU242FHBIA, AU482FIBIA: check indoor mainboard LED1 or outdoor mainboard LED1.
Failure code
Failure description
01
Outdoor defrosting temperature sensor TE circuit failure
02
Ambient temperature sensor TA circuit failure
03
Suction temperature sensor TS circuit failure
04
Discharging temperature sensor TD circuit failure
05
Outdoor mid-condenser temperature sensor failure
06
Over current abnormal
07
Current mutual inductor failure
09
IPM protection
10
EEPROM on PCB incorrect
11
Discharging temperature protection action
13
Pressure switch circuit abnormal
14
Pressure switch circuit abnormal
19
Discharging temperature protection action when in low frequency
20
Communication abnormal when chip 857 receives signal from chip 846
21
Compressor over current failure
22
Communication abnormal when chip 846 receives signal from indoor unit
23
Chip 846 EEPROM/chip 857 EEPROM failure
-99-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
AU48NFIBJA malfunction code:
LED display on
Malfunction description
Code
the
regulating
board
Normal
Defrosting
temperature
sensor abnormal
Ambient temperature sensor
abnormal
Suction temperature sensor
abnormal
Discharging
temperature
sensor abnormal
Coil
temperature
sensor
abnormal
Over current protection
0
Normal
1
E.4.
2
E.1.
3
E.3.
4
E.2.
5
E.5.
If
sent
to
indoor unit?
Remarks
Yes
Yes
Resumable
Yes
Resumable
Yes
Resumable
Yes
Resumable
Yes
Resumable
O.C.
Yes
After there are current malfunction for 3
P O.C.
no
times in 1 hour, the testing board will
6
display the last abnormal reason P X.X.
Need powered off and restart
Current sensor abnormal
Overload protection
8
IPM protection
Read
7
9
EEPROM
value
wrongly
10
C.T.
temperature
over high abnormal
After trouble shooting, need powered off
and restart
O.L.
Yes
After there are current malfunction for 3
P O.L.
no
times in 1 hour, the testing board will
E.P.
Yes
display the last abnormal reason P X.X.
P E.P.
no
Need powered off and restart
P E.E.
O.D.
Discharging
Yes
no
Need reset and restart
After there are current malfunction for 3
Yes
times in half an hour, the testing board
11
P O.D.
will display the last abnormal reason P
no
X.X. Need powered off and restart
High
pressure
switch
abnormal
Voltage over low protection
Voltage over high protection
Compressor
overheat
protection
Recover the parameter set
when out of factory
Clear
the
malfunction
memory
Need reset
Radiator temperature sensor
abnormal
12
13
14
O.P.
L.U.
Yes
Resumable
Yes
After there are voltage malfunction for 3
times in 1 hour, the testing board will
P L.U.
O.U.
display the last abnormal reason P X.X.
Yes
Need powered off and restart
P O.U.
15
O.H.
16
P I.A.
17
P C.T.
18
P r.E.
--
--
Yes
Resumable
no
Need reset and restart
no
Need reset and restart
no
Need reset and restart
No
use
temporarily
-100-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
10.2 Indoor failure code
A. Wired control type indoor unit: the dip switch of wired controller is 1 and 3 at ON, 2 and 4 at OFF.
Failure code
Failure description
E0
Float switch abnormal
E1
Outdoor unit failure
E2
Abnormal mode operation
E3
Liquid pipe temperature sensor failure
E4
Gas pipe temperature sensor failure
E5
Repeated indoor unit number (E5 flashes for a while and then turn to E9)
E7
Communication abnormal with EEV box
E8
Communication abnormal between wired controller and indoor PCB
E9
Communication abnormal between indoor and outdoor
EB (pre-set, not
available)
Water temperature sensor abnormal
B. Infrared control type indoor unit:
TIMER lamp flash times
Failure description
Once
Liquid pipe temperature sensor failure
twice
Gas pipe temperature sensor failure
3 times
Ambient temperature sensor failure
4 times
Communication abnormal between indoor and outdoor
5 times
Communication abnormal with EEV box
10 times
Indoor motor abnormal
11 times
Float switch or pump motor abnormal
12 times
Repeated indoor unit number
13 times
Indoor over heat
Note: if indoor RUN lamp flashes, that shows outdoor abnormal, so no matter how many times it
flashes, you should check outdoor indicator flash times and the relative failure code.
-101-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
10.3 AU242FHBIA, AU482FIBIA troubleshooting:
1.Communication failure between indoor and outdoor units
Wired controller: E9; 4 flashes of TIMER lamp
Is indoor unit address
properly set? Without
repetition?
no
Reset address
yes
Are communication terminals of
indoor and outdoor units
securely connected?
no
Reconnect
yes
Is shielded wire
used for
communication?
Use shielded wire. Shield layer
should be grounded at single
point
no
yes
Are communication wire
and power cable set
separately?
no
wiring Separately
yes
Is there external signal
interference?
yes
Eliminate interference
no
Is indoor mainboard poorly
welded?
yes
Replace indoor PCB
no
Are communication resistance and
capacitor of indoor PCB correct? See
NOTE
no
yes
Check outdoor mainboard
0010450351. Make necessary
replacement
-102-
Replace indoor PCB
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
2. Sensor failure
no
Is sensor properly connected?
reconnect
yes
Are resistance and
temperature characteristics of
sensor normal?
no
change sensor
yes
check if PCB is defective, if
yes,replace
3.EEPROM failure: outdoor displays 10
start
no
Is EEPROM in mainboard
inversely connected or in
poor contact?
re-set
replace PCB
4. Over current protection: 6 flashes of outdoor ALARM lamp, fault readout: 6
Is supply voltage good? Is
wire specification correct?
no
Modify power supply circuit
yes
Are connectors in
good condition?
no
Check and reconnect
yes
no
Check if the compressor current
is over protection value: 30A
Is filter board in good
condition?
yes
Change PCB
no
yes
1. Is output voltage among U, V and
W balanced?
2. Disconnect all terminals. Is
resistance between P and N; P and
U, V, W; N and U, V, W acceptable?
Change filter board
no
Check: 1. Is a valve in system close?
2. Is piping clogged;
3. Is system overfed; is there air in system;
4. (Cooling cycle) Is condenser dirty? Does outdoor fan motor run at
low speed or stop?
5. (Heating cycle) Is evaporator or filter dirty? Does indoor fan motor
run at low speed or stop?
6. Is ambient temperature too high? Is system overloaded?
yes
Is pressure acceptable?
no
yes
no
Is compressor in good condition?
yes
Is compressor winding resistance
acceptable? Is it stuck?
no
Is rectifier in good condition?
Replace power module
1. Check diode characteristics of rectifier+, AC; - AC
2. Measure voltage between P and N, which should
be 310VDC at 220VAC
yes
Is electrolytic capacitor
for filtration in good
condition?
no
Check capacitance and
conductivity and make
necessary replacement
yes
Check mainboard and make
necessary replacement
-103-
Commercial Air Conditioner
5. IPM power module protection
9 flashes of outdoor ALARM light, fault readout:9
Possible causes: 1. Short-circuit or overcurrent
2.Four-way control supply (15VDC) is less than 13.5V.
3.Module is hot with a temperature higher than 145° C.
Are connectors in low
voltage PCB in poor
contact?
yes
Check and reconnect
yes
Is 10-pin connector between IPM
and mainboard short-circuit or in
poor contact?
yes
Replace cable
no
Measure + and - terminals of
electrolytic capacitor. Is output voltage
of rectifier acceptable (310VDC at
220V.)
no
Replace rectifiter
yes
Check point: CN12 in mainboard.
Is four-way supply voltage less than
13.5V (normal value: 13.5-16.5VDC)
yes
Replace power board
no
if the compressor is normal no
Is compressor winding resistance
acceptable? Is it stuck?
yes
Is power module too hot?
yes
Is silica gel well distributed on radiation fins?
no
Is current up to protection yes
limit of power module?
1.Is voltage of supply circuit too low?
2.Is heat exchanger or indoor fan motor broken?
3.Is ambient temperature too high? Is system
overloaded?
no
1.Is output voltage among U, V and W balanced?
2.Disconnect all terminals. Is resistance between P
and N; P and U, V, W; N and U, V, W acceptable?
no
Replace power module
yes
Check mainboard and make
necessary replacement
-104-
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
6. Discharging temperature protection
11 flashes of outdoor ALARM light; fault readout: 11
When is temperature protection activated: Temperature of
discharge line is above 115° C.
no
Are stop valves in gas pipe and liquid
pipe of outdoor unit open totally?
Open the stop valve
yes
Does EEV work properly during heating cycle?
Check 1) Connector 2) Winding resistance 3)
Valve 4) Mainboard
yes
no
Is actual discharging temperature detected
by thermometer too high?
no
Repair outdoor EEV
Is discharging temperature
sensor in good condition?
yes
yes
Does indoor fan work properly during heating
cycle? Does outdoor fan work properly during
cooling cycle?
replace PCB
no
Check fan motor and capacitor
yes
yes
Is filter or heat exchanger dirty?
cleaning
no
Measure balance pressure and running
pressure to see if the refrigerant is too much or
lack. Is there air in system? Is there a leak?
yes Conduct leak test.
Evacuate and recharge
no
Is piping twisted or deformed? Is piping
clogged with weld?
no
yes
Adjustment or
replacement
no
When TD is high, is refrigerant injection
circuit in good condition? Is injection
capillary in good condition?
no
1.Check coil and valve body of
electromagnetic valve.
2.Check injection capillary.
-105-
Replace TD sensor
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
7. High pressure overhigh protection: 13 flashes of outdoor alarm lamp.
When high pressure switch is activated: Pressure is above 3.0 MPa.
Are connectors of CN16 pressure switch
in good condition?
no
Check and reconnect
yes
Is high pressure switch activated?
no
replace PCB
yes
Is pressure value detected by
pressure gage above 3MPa?
no
Replace high side pressure switch
yes
Are stop valves in suction
pipe and liquid pipe of
outdoor unit open?
no
Open stop valve
yes
yes
Is piping twisted or deformed?
no
if outdoor fan motor work properly during cooling
cycle? and if indoor fan motor and indoor EEV
work properly during heating cycle?
Repair or
replacement
no Check fan motor
or indoor EEV
yes
yes
Is filter or heat exchanger dirty?
cleaning
no
Is system overfed? Is there air in system?
Is reading of discharging pipe pressure
gauge oscillatory?
yes
Evacuate and recharge
-106-
Commercial Air Conditioner
8. Low pressure too low protection
Low pressure is lower than 0.05MPa for 3 minutes; or lower than
0.05MPa for 30 seconds during halt time
no
Are connectors of pressure switch in good
condition?
Check and reconnect
yes
no
Is low side pressure switch activated?
Replace PCB
yes
Is pressure valve detected by
pressure gauge lower than
0.05MPa?
no
Replace low pressure switch
yes
If outdoor stop valves of gas pipe
and liquid pipe are open totally
no
Open stop valve
yes
Is piping twisted or deformed?
no
Adjust and maintain
no
Do outdoor fan and PMV work
properly during cooling cycle? Do
indoor fan and EEV work
properly during heating cycle?
no
Repair fan motor and EEV
yes
If the filter and heat exchanger
are dirty
yes
Cleaning
yes
If refrigerant circuit is leak? or
lack of refrigerant?
yes
Check leakage point, evacuate
and recharge
-107-
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
9. Fault in built-in overload protection of compressor
Normally closed; open in the event of a fault.
Fault readout: 8; 8 flashes of ALARM light
no
Is CN14 in power supply
drive properly connected?
reconnect
yes
Check power power
source board to see if
the 10th pin of CN13
has low level. If not,
replace it.
no
Is overload protector
open-circuit?
yes
no
Is resistance of
compressor winding
acceptable?
Replace compressor
yes
If compressor current and discharge
pressure are acceptable, the problem
is not related to refrigeration system.
Check if piping is clogged, ambient
temperature is high or heat
exchanger is soiled
10. Current transducer failure
Display 7, ALARM lamp flashes 7 times
check if the wiring is
correct according to
wiring diagram
no
reconnect
yes
if compressor is
running?
Is rectifier in good condition? Is AC
contactor activated? Is contact
good? Is power module in good
condition?
no
yes
Is compressor current
acceptable? Is DC voltage
between both ends of CN4
acceptable?
yes
Check connection of mainboard
CN4 and make necessary
replacement
no
Is connection between
filter board CN1 and
mainboard CN4 normal?
yes
Replace filter
-108-
no
reconnect
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
10.4 AU48NFIBJA troubleshooting:
1.Communication failure
Note: For outdoor units before December 2004, in the event of 3 IPM or high current
faults, outdoor unit will stop signal transmission to indoor unit. Indoor unit will display
communication fault.
Normally, testing board will indicate number of indoor units. The number is fixed.
Wired controller display: E9; 4 flashes of indoor TIMER light of models with remote
control
Is number of indoor units
indicated by testing board
correct? Changeable?
yes
yes
Is indoor unit address
properly set? Without
repetition?
Communication normal
no
Reset address
yes
Are communication terminals of
indoor and outdoor units
securely connected?
no
Reconnect
yes
Is shielded wire
used for
communication?
Use shielded wire. Shield layer
should be grounded at single
point
no
yes
Are communication wire
and power cable set
separately?
no
wiring Separately
yes
Is there external signal
interference?
yes
Eliminate interference
no
Is indoor mainboard poorly
welded?
yes
Replace indoor PCB
no
Are communication resistance and
capacitor of indoor PCB correct? See
NOTE
no
Replace indoor PCB
yes
Check outdoor mainboard. Make
necessary replacement
NOTE: 1. R49.R50 resistor in AS072-182FCBHA circuit and R40.R41 resistor in AE072-242FCBKA
circuit have a resistance of 100 K instead of 47K AS models and C28~C30 of AE models use 104
polyester resistors.
-109-
Commercial Air Conditioner
2.Sensor failure
Are connectors of sensor properly
connected?
no
Reconnect
yes
Are resistance and temperature
characteristics of sensor
acceptable?
no
Replace sensor
yes
Check PCB and replace
3.EEPROM failure
no
Is CPU chip installed firmly?
Reinstall in right direction
yes
Is fault corrected after
JP301 is reset?
yes
Normal
no
yes
If chip is broken?
Replace chip
no
Is it normal after replacing chip?
no
Check PCB and replace
-110-
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
4. Over current protection: outdoor LED302 flashes 6 times
Is supply voltage good?
Lack of phase?
no
Modify power supply circuit
yes
Are connectors in
good condition?
no
Check and reconnect
yes
Is actual compressor current detected
by ammeter or test board (0010451601)
above protection limit 16.9A?
no
Wrong report. Replace
0010451971 or 0010451530
yes
1. Is output voltage among U, V and
W balanced?
2. Disconnect all terminals. Is
resistance between P and N; P and
U, V, W; N and U, V, W acceptable?
no
Check: 1. Is a valve in system close?
2. Is piping clogged;
3. Is system overfed; is there air in system;
4. (Cooling cycle) Is condenser dirty? Does outdoor fan motor run at
low speed or stop?
5. (Heating cycle) Is evaporator or filter dirty? Does indoor fan motor
run at low speed or stop?
yes
Is pressure acceptable?
no
yes
no
Is compressor in good condition?
yes
Is 3-phase rectifier in good
condition?
no
Replace power module
Is compressor winding resistance
acceptable? Is it stuck?
1.Check if resistance between rectifier+, L1L2L3; and - L1L2L3
complies with diode characteristics.
2. Measure + and - terminals of CN201. Measure voltage between P
and N, which should be 530VDC at 380VAC
yes
Is electrolytic capacitor
for filtration in good
condition?
no
Check capacitance and
conductivity and make
necessary replacement
yes
Check mainboard and make
necessary replacement
-111-
Commercial Air Conditioner
5. IPM power module protection
9 flashes of outdoor LED302 light.
Possible causes: 1. Short-circuit or overcurrent
2. Control supply is less than 13.5V.
3.Module is hot with a temperature higher than 145° C
Are connectors in light
current board in poor
contact?
yes
Check and reconnect
yes
Is 9-pin connector between IPM
and low voltage board short-circuit
or in poor contact?
yes
Replace cable
no
Check point: + and - pins of CN201 in
power source board. Is output voltage
of rectifier acceptable (530VDC at
380V)
no
Replace rectifiter
yes
Check point: CN12 in mainboard.
Is four-way supply voltage less than
13.5V (normal value: 13.5-16.5VDC)
yes
Replace power board
no
if the compressor is normal
no
Is compressor winding resistance
acceptable? Is it stuck?
yes
Is power module too hot?
yes
Is silica gel well distributed on radiation fins?
no
Is current up to protection yes
limit of power module?
1.Is voltage of supply circuit too low?
2.Is heat exchanger or indoor fan motor broken?
3.Is ambient temperature too high? Is system
overloaded?
no
1.Is output voltage among U, V and W balanced?
2.Disconnect all terminals. Is resistance between P
and N; P and U, V, W; N and U, V, W acceptable?
no
Replace power module
yes
Is there any damaged component
in power module driver?
no
Replace power module driving board
yes
Check low voltage and make
necessary replacement
-112-
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
6. Discharging temperature protection
11 flashes of outdoor LED302
When is temperature protection activated: Temperature of
discharge line is above 115° C
no
Are stop valves in gas pipe and liquid
pipe of outdoor unit open totally?
Open the stop valve
yes
Does EEV work properly during heating cycle?
Check 1) Connector 2) Winding resistance 3)
Valve 4) Mainboard
no
Repair outdoor EEV
yes
Is actual discharging temperature detected
by thermometer too high?
no
Is discharging temperature
sensor in good condition?
yes
yes
Does indoor fan work properly during heating
cycle? Does outdoor fan work properly during
cooling cycle?
replace PCB
no
Check fan motor and capacitor
yes
Is filter or heat exchanger dirty?
yes
cleaning
no
Measure balance pressure and running
pressure to see if the refrigerant is too much or
lack. Is there air in system? Is there a leak?
yes Conduct leak test.
Evacuate and recharge
no
Is piping twisted or deformed? Is piping
clogged with weld?
no
yes
Adjustment or
replacement
no
When TD is high, if SV2 by pass circuit
can work normally
no
Check coil and valve body of
electromagnetic valve.
-113-
Replace TD sensor
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
7. High pressure overhigh protection: 12 flashes of outdoor LED302 When is high pressure switch
activated: Pressure is above 3.0 MPa.
Are connectors of CN318 pressure
switch in good condition?
no
Check and reconnect
yes
Is high pressure switch activated?
no
replace PCB
yes
Is pressure value detected by
pressure gage above 3MPa?
no
Replace high pressure switch
yes
Are stop valves in suction
pipe and liquid pipe of
outdoor unit open?
no
Open stop valve
yes
yes
Is piping twisted or deformed?
no
if outdoor fan motor work properly during cooling
cycle? and if indoor fan motor and indoor EEV
work properly during heating cycle?
Repair or
replacement
no Check fan motor
or indoor EEV
yes
yes
Is filter or heat exchanger dirty?
cleaning
no
Is system overfed? Is there air in system?
Is reading of discharging pipe pressure
gauge oscillatory?
yes
Evacuate and recharge
-114-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
8. Low pressure too low protection
Outdoor LED flashes 15 times. Low pressure is lower than 0.05MPa for 3 minutes; or lower than 0.05MPa for 30
seconds during halt time
no
Are connectors of CN317pressure switch
in good condition?
Check and reconnect
yes
no
Is low side pressure switch activated?
Replace PCB
yes
Is pressure valve detected by
pressure gauge lower than
0.05MPa?
no
Replace low pressure switch
yes
If outdoor stop valves of gas pipe
and liquid pipe are open totally
no
Open stop valve
yes
Is piping twisted or deformed?
no
Adjust and maintain
no
Do outdoor fan and PMV work
properly during cooling cycle? Do
indoor fan and EEV work
properly during heating cycle?
no
Repair fan motor and EEV
yes
If the filter and heat exchanger
are dirty
yes
Cleaning
yes
If refrigerant circuit is leak? or
lack of refrigerant?
yes
Check leakage point, evacuate
and recharge
-115-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
10.5 H-MRV indoor unit troubleshooting:
1.
Models with wired controller
Models with wireless remote controller
Fault code readout: E0
11 flashes of Timer light.
Fault description: The float switch or pump motor is broken.
Check if the switch and
pump connector are in
good condition?
No
Repair
Yes
Check if the float switch
is open?
Yes
No
Replace the indoor
PC board
Check if the pump is
running?
Yes
Check if the drain
system is clogged or
the float switch is stuck.
No
Check if the
pump is poweron?
Yes
Clean the drain system
and reconnect the
switch.
Yes
Replace the
pump
2.
Models with wired controller
Models with wireless remote controller
Fault code readout: E1
The Operation light flashes.
Check in accordance with the list of outdoor
fault codes.
Fault description: Failure in outdoor unit
Faults in models with remote controller can be identified by the number of flashes made by fault indicator
of outdoor unit. Check in accordance with the list of fault codes.
3.
No.
Models with wired controller
Models with wireless remote controller
1
Readout: E3
1 flash of Timer light.
2
Readout: E4
2 flashes of Timer light.
3
N/A
3 flashes of Timer light.
1 Description: Liquid line temperature sensor (Ti) is short-circuit or open-circuit.
2 Description: Suction line temperature sensor (T0) is short-circuit or open-circuit.
3 Description: Ambient temperature sensor is short-circuit or open-circuit.
-116-
Commercial Air Conditioner
Check if the sensor is properly
connected to the mainboard.
Yes
No
Check the sensor resistance
with a multimeter:
R25ć=10Kȍ+3%˗
B(25/50)=3741K+70K
Reconnect
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Yes Replace the mainboard.
No
Replace the sensor
4.
Models with wired controller
Models with wireless remote controller
Readout: E5
6 flashes of Timer light.
Description: Transmission error between indoor unit 846 chip and 808 chip.
What to do: Replace the mainboard.
5.
Models with wired controller
Models with wireless remote controller
Readout: E7
5 flashes of Timer light.
Description: Transmission error with electronic expansion valve driver.
Check if the electric control of
indoor unit and the electric
control of expansion valve share
the same supply and if live wire
and null wire are properly
connected.
No
Reconnect
Yes
Check if the internal wiring of indoor unit and
expansion valve is properly done. For AEFCBKA mainboard, a jumper wire is used to
select the function of wire controller.
Yes
Check if the mainboard is noticeably damaged
and if the control panel works properly after
replacement.
Check if the PCB CN23 of AC series is short
connected.
No
Replace the
mainboard
Yes
Remove the
short wire
-117-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
6.
Models with wired controller
Models with wireless remote controller
Readout: E8
/
Description: Transmission error between wire controller and indoor unit mainboard
Check if the wire controller is
properly connected to A, B and C
of indoor unit.
No
Reconnect
Yes
No
Check if the voltage between A and B is
+12VDC?
Replace indoor
unit mainboard
Note: CN15 and CN17 of AE series should be
short connected.
Yes
Check if the voltage between C and B
changes regularly?
No
Replace the wire
controller
7.
Models with wired controller
Models with wireless remote controller
Readout: N/A
10 flashes
Description: PG failure in the fan of indoor unit
Check if the fan is properly
connected to the mainboard.
Yes
Check if PIN 3 and 1 of CN2 (color
models) or CN8 (regular models) are up to
DC 5V.
No
Yes
Check if there is pulse output
from PIN2 and 1 of CN2 or
CN8.
Yes
Replace the indoor unit
mainboard.
No
Replace the fan.
-118-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
8.
Models with wired controller
Models with wireless remote controller
Readout: E9
4 flashes of Timer light
Description: Transmission error with outdoor unit (an alarm will be given 4 minutes after the appliance is
started.)
Check if there is repetition in the
indoor unit address IDs.
No
Check if the transmission line is shortcircuit or open-circuit; if the shield wires at
both ends of transmission line are earthed
properly; if the earth wire of outdoor unit is
properly earthed.
No
Disconnect the indoor unit transmission lines
from the control panel and connect them to
the outdoor unit. Check if the number of
indoor units is steady through the outdoor
unit mainboard or the test kit.
No
Check if the transmission resistor and
capacitor in indoor unit mainboard are in
good condition. See flow chart of
troubleshooting for outdoor unit.
-119-
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Models with wired controller
Models with wireless remote controller
N/A
8 flashes of Timer light
Description: Fault with 12V supply of heavy current board in expansion valve
Check if there are noticeable burns or hot
components in the mainboard. Use a
multimeter to check if the 12V supply in
7805 chip of mainboard is in good
condition. Measure the central and the left
pins of the chip. Check if the mainboard is
properly connected.
Replace the mainboard
Models with wired controller
Models with wireless remote controller
N/A
9 flashes of Timer light
Description: Fault with polarity of indoor unit (to be determined)
Check if the null wire and the live wire
of indoor unit are properly connected.
Check if the mainboard and the fan wire
are noticeably damage.
It’s recommended to bring spare parts of
fan. Connect the fan to see if there is any
alarm. If yes, replace the mainboard. If no,
replace the fan.
-120-
sound pressure level DB
sound pressure level DB
.
40
0
.
50
0
.
63
0
80
.
80
0
1
.
00
0
1
.
25
0
1
.
60
0
2
.
00
0
2
.
50
0
3
.
15
0
4
.
00
0
5
.
00
0
6
.
30
0
8
.
00
0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
00 250 600 000 500 150 000 000 300 000 000 500 000 000
0
1
1
1
2
2
3
4
5
6
8 10 12 16 20
-121-
0
10
20
25
.0
31
.5
40
.0
50
.0
63
.0
.0
10
0
.0
12
5
.0
16
0
.0
20
0
.0
25
0
.0
31
5
.0
40
0
.0
50
0
.0
63
0
.0
80
0
.0
10
0
0
0.
12
5
0
0.
16
0
0
0.
20
0
0
0.
25
0
0
0.
31
5
0
0.
40
0
0
0.
50
0
0
0.
63
0
0
0.
80
0
0
0.
00
0
0.
50
0
0.
00
0
0.
00
0
0.
third octave band frequency Hz
10
12
16
20
fan low
cooling low
heating low
fan med
cooling med
heating med
40
30
fan high
cooling high
heating high
50
60
sound level-AB182FCBIA
third octave band frequency Hz
fan low
cooling low
heating low
fan med
10.0
5
cooling med
20.0
.
31
heating med
30.0
0
fan high
40.0
.
25
cooling high
50.0
0.0
heating high
60.0
70.0
noise level-AU242FHBIA
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
11. Noise level
sound pressure level DB
sound pressure level DB
60
58
56
54
52
50
48
46
44
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
75
73
71
69
67
65
63
61
59
57
55
53
51
49
47
45
43
41
39
37
35
33
31
29
27
25
.0
25
.0
25
.5
31
.5
31
.0
40
.0
40
.0
50
.0
50
.0
63
.0
63
-122third octave band frequency Hz
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
80 100 125 160 200 250 315 400 500 630 800 000 250 600 000 500 150 000 000 300 000 000 500 000 000
8
5
6
4
3
2
2
1
1
1
20
12
16
10
noise level-AE242FCBKA
third octave band frequency Hz
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
80 100 125 160 200 250 315 400 500 630 800 000 250 600 000 500 150 000 000 300 000 000 500 000 000
8
6
5
3
4
2
2
1
1
1
20
16
10
12
noise level-AU482FIBIA
heat (89Hz)
cool (89Hz)
heat (89Hz)
cool (89Hz)
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
sound pressure level DB
sound pressure level DB
58
56
54
52
50
48
46
44
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
76
74
72
70
68
66
64
62
60
58
56
54
52
50
48
46
44
42
40
38
36
34
32
30
28
26
.0
25
.0
25
.5
31
.5
31
.0
40
.0
40
.0
50
.0
50
.0
63
.0
63
-123third octave band frequency Hz
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
80 100 125 160 200 250 315 400 500 630 800 000 250 600 000 500 150 000 000 300 000 000 500 000 000
8
6
5
4
2
2
3
1
1
1
20
10
12
16
noise level-AE242FCBKA
third octave band frequency Hz
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
80 100 125 160 200 250 315 400 500 630 800 000 250 600 000 500 150 000 000 300 000 000 500 000 000
2
6
0
8
6
5
4
3
2
2
0
1
1
1
2
1
1
1
noise level-AU48NFIBJA
cool (90Hz)
heat (90Hz)
cool (90Hz)
heat (90Hz)
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
12. Performance curves
heating capacity( kW)
ƵAU242FHBIA
11.00
10.00
9.00
8.00
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
-15 -13 -11 -9
-7
-5
-3
-1
1
3
5
7
9
11
13
15
outdoor temp.
10.00
9.00
cooling capacity(kW)
8.00
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
18
23
28
33
outdoor temp.
-124-
38
43
17
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Ƶ AU48**
1) Calculation method
Calculation method of refrigerating capacity-Refrigerating capacity to be known = Refrigerating
capacity x (1) x (2) x (3) x (4) x (5) W
(3) Capacity modification value
Capacity compensation value of outdoor air dry-bulb
temperature condition
1.2
1.2
1.1
1.1
1.0
1.0
0.9
0.9
-5
0.8
15
20
24
indoor air wet-bulb temperature(*)
0
5
10
15
20
25
under airflow variation rate of
indoor unit group (only for
airflow type unit)
30
35
40 43
1.0
0.9
80
90
100
110
120
airflow variation rate
(5) Capacity compensation suitable
for total capability of indoor unit
group (cooling)
Outdoor unit
120
100
lo
ho
30
86
87
88
89
91
90
92
93
94
95
96
100%
99
99 98
97
98
97
ha
la
hc hb
lb
A
B
lc
80
60
40
20
C
10 20 25 30 40 50 60 70 80 90 100 110 120
standard capacity
Indoor unit group
he
capacity modification value
50
40
-30
-40
-50
1.1
outdoor air dry-bulb temperature(*)
(4) Fall of refrigerant pipe of indoor and outdoor
unit, capacity compensation value of pipe length
20
10
0
-10
-20
Capacity modification value
(1) Capacity compensation value of indoor
air wet-bulb temperature condition
0
L(m) Length of refrigerant
pipe (corresponding length)
L (m)
20
40
60
80
100 120 135
Total capacity of indoor unit group
2) Calculation method of heating capacity—Heating capacity to be known = Heating capacity ((1) x (2) x (3) x (4) x (5) x (6)) W
(1) Capacity modification under indoor
air wet-bulb temperature condition
1.2
1.2
1.1
1.1
(2) Capacity modification under outdoor air wet-bulb temperature condition (3) Capacity modification
value under airflow variation
rate of indoor unit group
1.1
1.0
1.0
1.0
0.9
0.9
0.8
0.8
15
0.7
20
24
0.9
80
0.5
-15
-10
-5
0
5
outdoor air wet-bulb temperature(*)
10
(4) Fall of refrigerant pipe of indoor and outdoor unit,
capacity compensation value of pipe length
50
40
capacity modification value
120
H=ho+(the max. value of ha, hb, hc)
L=lo+(the max. value of la, lb, lc)
0
lo
86
87
88
89
91
90
92
93
94
95
96
he
hb ha
Length of refrigerant pipe (corresponding length) L (m)
-126-
lb
le
B
C
100
80
60
40
20
standard capacity
hc
A
Indoor unit group
100%
99
99 98
97
98
97
ho
10 20 25 30 40 50 60 70 80 90 100 110 120
15
(5) Capacity compensation suitable
for total capability of indoor unit
group (heating)
Outdoor unit
30
-30
-40
-50
100 110 120
0.6
indoor air dry-bulb temperature(*)
20
10
0
-10
-20
90
20 40 60 80 100 120 135
Total capacity of indoor unit group
Commercial Air Conditioner
Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Sincere Forever
Haier Group
Haier Industrial Park, No.1, Haier Road
266101, Qingdao, China
http://www.haier.com