Download AC Inverter Service Manual

Content
MSC-18HRIN1; MSH-18HRIN1(AAC-18ISCH)
MSE-09HRIN2; MSE-12HRIN2
MSG-07CRIN2; MSG-09HRIN2
MSG-12HRIN2;
MSG-09HRI ;MSG-12HRI
MSG-21HRI ; MSG-24HRI
1
Content
Content
1.
Precaution .......................................................................................................................... 1
1.1
1.2
2.
3.
Function.............................................................................................................................. 3
Dimension........................................................................................................................... 5
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
4.
5.
6.
Indoor unit（Alfa） ............................................................................................................................ 5
Outdoor unit（Alfa）.......................................................................................................................... 5
Indoor unit（Corona）....................................................................................................................... 6
Outdoor unit（Corona） .................................................................................................................... 6
Indoor unit(Inverter Eco) .................................................................................................................... 7
Outdoor unit(Inverter Eco) ................................................................................................................. 7
Indoor unit(Inverter Star).................................................................................................................... 8
Outdoor unit(Inverter Star) ................................................................................................................. 8
Specification....................................................................................................................... 9
Refrigerant cycle diagram ............................................................................................... 12
Operation limits................................................................................................................ 13
6.1
6.2
7.
Cooling operation............................................................................................................................. 13
Heating operation ............................................................................................................................ 13
Schematic diagram and Wiring diagram........................................................................ 14
7.1.
7.2.
8.
Schematic diagram .......................................................................................................................... 14
Wiring diagram ................................................................................................................................ 18
Installation details ............................................................................................................ 23
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
9.
Wrench torque sheet for installation ................................................................................................ 23
Connecting the cables ..................................................................................................................... 23
Pipe length and the elevation .......................................................................................................... 23
Air purging of the piping and indoor unit .......................................................................................... 24
Pumping down (Re-installation) ....................................................................................................... 25
Re-air purging (Re-installation) ........................................................................................................ 26
Balance refrigerant of the 2-way, 3-way valves................................................................................ 27
Evacuation....................................................................................................................................... 28
Gas charging ................................................................................................................................... 29
Pressure table .................................................................................................................. 30
9.1
9.2
10.
10.1
10.2
10.3
10.4
10.5
10.6
2
Safety Precaution .............................................................................................................................. 1
Warning ............................................................................................................................................. 1
MSH-18HRIN1................................................................................................................................. 30
MSC-18HRIN1................................................................................................................................. 30
Capacity table................................................................................................................... 31
MSH-18HRIN1................................................................................................................................. 31
MSC-18HRIN1................................................................................................................................. 32
MSG-09HRI ..................................................................................................................................... 33
MSG-12HRI ..................................................................................................................................... 33
MSG-21HRI ..................................................................................................................................... 34
MSG-24HRI ..................................................................................................................................... 34
Content
11.
Electronic function........................................................................................................... 35
11.1.
11.2.
11.3.
11.4.
11.5.
11.6.
11.7.
11.8.
11.9.
11.10.
11.11.
11.12.
11.13.
11.14.
11.15.
12.
13.
13.1
13.2
13.3
13.4
13.5
13.6
13.7
13.8
14
3
Display board................................................................................................................................... 35
Protection ........................................................................................................................................ 35
Fan-only mode................................................................................................................................. 35
Cooling mode .................................................................................................................................. 35
Dehumidifying mode ........................................................................................................................ 36
Heating mode .................................................................................................................................. 36
Defrosting operation (Available for heating only). ............................................................................ 38
Outdoor low temperature protection (optional) ................................................................................ 38
Automatic operation mode............................................................................................................... 38
Manual switch .................................................................................................................................. 39
Timer Function................................................................................................................................. 39
Sleep mode ..................................................................................................................................... 39
Auto restart function......................................................................................................................... 39
Turbo function.................................................................................................................................. 39
Plasma............................................................................................................................................. 39
Model and Parameters..................................................................................................... 40
Troubleshooting ............................................................................................................... 42
Indoor Unit Error Display ................................................................................................................. 42
Diagnostic chart ............................................................................................................................... 47
Resetting phenomenon often occurs during operation .................................................................... 48
Operation lamp flashes and Timer lamp off ..................................................................................... 48
Operation lamp flashes and Timer lamp on ..................................................................................... 48
Operation lamp off and Timer lamp flashes ..................................................................................... 49
Operation lamp on and Timer lamp flashes ..................................................................................... 49
Operation lamp flashes, Timer lamp flashes.................................................................................... 49
Characteristic of temperature sensor ............................................................................ 50
Service manual
1.
1.1
Precaution
Safety Precaution
„ To prevent injury to the user or other people and property damage, the following instructions must be followed.
„ Incorrect operation due to ignoring instruction will cause harm or damage.
„ Before service unit, be sure to read this service manual at first.
1.2
Warning
¾ Installation
„ Do not use a defective or underrated circuit breaker.
Use this appliance on a dedicated circuit.
There is risk of fire or electric shock.
„ For electrical work, contact the dealer, seller, a
qualified electrician, or an Authorized service center.
Do not disassemble or repair the product, there is risk of
fire or electric shock.
„ Always ground the product.
There is risk of fire or electric shock.
„ Install the panel and the cover of control box
securely.
There is risk of fire of electric shock.
„ Always install a dedicated circuit and breaker.
Improper wiring or installation may cause fore or electric
shock.
„ Use the correctly rated breaker of fuse.
There is risk of fire or electric shock.
„ Do not modify or extend the power cable.
There is risk of fire or electric shock.
„ Do not install, remove, or reinstall the unit by
yourself (customer).
There is risk of fire, electric shock, explosion, or injury.
„ Be caution when unpacking and installing the
product.
Sharp edges could cause injury, be especially careful of
the case edges and the fins on the condenser and
evaporator.
„ For installation, always contact the dealer or an
Authorized service center.
There is risk of fire, electric shock, explosion, or injury.
„ Do not install the product on a defective installation
stand.
It may cause injury, accident, or damage to the product.
„ Be sure the installation area does not deteriorate
with age.
If the base collapses, the air conditioner could fall with it,
causing property damage, product failure, and personal
injury.
„ Do not let the air conditioner run for a long time
when the humidity is very high and a door or a
windows is left open.
Moisture may condense and wet or damage furniture.
„ Take care to ensure that power cable could not be
pulled out or damaged during operation.
There is risk of fire or electric shock.
„ Do not place anything on the power cable.
1
There is risk of fire or electric shock.
„ Do not plug or unplug the power supply plug during
operation.
There is risk of fire or electric shock.
„ Do not touch (operation) the product with wet hands.
There is risk of fire or electric shock.
„ Do not place a heater or other appliance near the
power cable.
There is risk of fire and electric shock.
„ Do not allow water to run into electric parts.
It may cause fire, failure of the product, or electric shock.
„ Do not store or use flammable gas or combustible
near the product.
There is risk of fire or failure of product.
„ Do not use the product in a tightly closed space for a
long time.
Oxygen deficiency could occur.
„ When flammable gas leaks, turn off the gas and
open a window for ventilation before turn the
product on.
Do not use the telephone or turn switches on or off.
There is risk of explosion or fire.
„ If strange sounds, or small or smoke comes from
product. Turn the breaker off or disconnect the
power supply cable.
There is risk of electric shock or fire.
„ Stop operation and close the window in storm or
hurricane. If possible, remove the product from the
window before the hurricane arrives.
There is risk of property damage, failure of product, or
electric shock.
„ Do not open the inlet grill of the product during
operation. (Do not touch the electrostatic filter, if the
unit is so equipped.)
There is risk of physical injury, electric shock, or product
failure.
„ When the product is soaked (flooded or submerged),
contact an Authorized service center.
There is risk of fire or electric shock.
„ Be caution that water could not enter the product.
There is risk of fire, electric shock, or product damage.
„ Ventilate the product from time to time when
operating it together with a stove, etc.
There is risk of fire or electric shock.
„ Turn the main power off when cleaning or
maintaining the product.
Service manual
There is risk of electric shock.
„ When the product is not be used for a long time,
disconnect the power supply plug or turn off the
breaker.
There is risk of product damage or failure, or unintended
operation.
„ Take care to ensure that nobody could step on or fall
onto the outdoor unit.
This could result in personal injury and product damage.
¾ CAUTION
„ Always check for gas (refrigerant) leakage after
installation or repair of product.
Low refrigerant levels may cause failure of product.
„ Install the drain hose to ensure that water is drained
away properly.
A bad connection may cause water leakage.
„ Keep level even when installing the product.
To avoid vibration of water leakage.
„ Do not install the product where the noise or hot air
from the outdoor unit could damage the
neighborhoods.
It may cause a problem for your neighbors.
„ Use two or more people to lift and transport the
product.
Avoid personal injury.
„ Do not install the product where it will be exposed to
sea wind (salt spray) directly.
It may cause corrosion on the product. Corrosion,
particularly on the condenser and evaporator fins, could
cause product malfunction or inefficient operation.
¾ Operational
„ Do not expose the skin directly to cool air for long
periods of time. (Do not sit in the draft).
This could harm to your health.
„ Do not use the product for special purposes, such
as preserving foods, works of art, etc. It is a
2
consumer air conditioner, not a precision refrigerant
system.
There is risk of damage or loss of property.
„ Do not block the inlet or outlet of air flow.
It may cause product failure.
„ Use a soft cloth to clean. Do not use harsh
detergents, solvents, etc.
There is risk of fire, electric shock, or damage to the
plastic parts of the product.
„ Do not touch the metal parts of the product when
removing the air filter. They are very sharp.
There is risk of personal injury.
„ Do not step on pr put anything on the product.
(outdoor units)
There is risk of personal injury and failure of product.
„ Always insert the filter securely. Clean the filter
every two weeks or more often if necessary.
A dirty filter reduces the efficiency of the air conditioner
and could cause product malfunction or damage.
„ Do not insert hands or other object through air inlet
or outlet while the product is operated.
There are sharp and moving parts that could cause
personal injury.
„ Do not drink the water drained from the product.
It is not sanitary could cause serious health issues.
„ Use a firm stool or ladder when cleaning or
maintaining the product.
Be careful and avoid personal injury.
„ Replace the all batteries in the remote control with
new ones of the same type. Do not mix old and mew
batteries or different types of batteries.
There is risk of fire or explosion.
„ Do not recharge or disassemble the batteries. Do not
dispose of batteries in a fire.
They may burn of explode.
„ If the liquid from the batteries gets onto your skin or
clothes, wash it well with clean water. Do not use the
remote of the batteries have leaked.
The chemical in batteries could cause burns or other
health hazards.
Service manual
2.
Function
Indoor unit
Operation ON/OFF by remote controller
Sensing by room temperature
Room temperature sensor.
Pipe temperature sensor.
Room temperature control
Maintain the room temperature in accordance with the setting temperature.
Anti-freezing control in cooling
Prevent the water being freezed on evaporator by sensing
the evaporator pipe temperature in cooling mode
Work voltage (160v-253v)
High efficiency (30%)
Time Delay Safety control
Restarting is for approx. 3 minutes..
Indoor fan speed control
Tele Remote control (Optional)
Self-diag. function
Turbo wind, high, med, low, breeze.
Anti-cold function
Two-direction air vane
The unit will decide the louver direction according to operation mode.
Sleep mode auto control
The fan is turn to low speed (cooling/heating).
The unit will be turn off at the seventh hour.
Independent dehumidification
The function is usually used in rainy days in
springtime or damp areas.
Air flow Direction control
The louver can be set at the desired position or swing up and
down automatically
Auto mode
The mode can be change by the room temperature.
Prevent the cold wind at
the beginning of unit start.
Plasma (Optional)
The function will be operated
in any operation mode.
Auto defrost
Auto-restart function
When the power supply is interrupted and then
restore, the air conditioners automatically
restore the previous function setting.
Flexible wiring connection
DSP High-speed Chip
Temp. Compensation
Driving heating at -15℃
3
Service manual
Outdoor unit
Power relay control
The unit has 3 mins delay between continuously ON/OFF operations.
Low noise air flow system
Bird tail propeller fan makes the outdoor unit run more quietly.
Hydrophilic aluminum fin
The hydrophilic fin can improve the heating efficiency at operation mode.
4 way valve control
It is only operated in the heating operation mode except defrosting operation.
Anti-rust cabinet
Made from electrolytic zinc steel sheet and anti-rust coated components.
Valve protection cover
It protects the valves and prevents water from dripping.
Discharge pipe temperature protect
4
Service manual
3.
3.1
Dimension
Indoor unit（Alfa）
Dimension
Mode
W
H
D
12K
815
280
215
3.2
Outdoor unit（Alfa）
Dimension
Mode
12K
5
W
H
D
760
590
285
Service manual
3.3
Indoor unit（Corona）
Dimension
Mode
18K
3.4
H
D
920
292
225
Outdoor unit（Corona）
Dimension
Mode
18K
6
W
W
845
H
D
695
335
L1
L2
L3
560
360
560
Service manual
3.5
Indoor unit(Inverter Eco)
Dimension
Mode
W
H
D
7K
750
250
188
9K
750
250
188
12K
815
280
195
3.6
Outdoor unit(Inverter Eco)
Dimension
Mode
7
W
H
D
7K
780
540
250
9K
780
540
250
12K
780
540
250
Service manual
3.7
Indoor unit(Inverter Star)
Dimension
Mode
W
H
D
7K
750
250
205
9K
750
250
205
12K
815
280
215
3.8
Outdoor unit(Inverter Star)
Dimension
Mode
8
W
H
D
7K
760
590
285
9K
760
590
285
12K
760
590
285
Service manual
4.
Specification
Ac Alfa，Ac Corona
Model
MSC-18HRIN1
MSE-09HRIN2
MSE-12HRIN2
Ph-V-Hz 1, 220-240V~, 50Hz
MSH-18HRIN1
1, 220-240V~,50Hz
1, 220-240V~, 50Hz
1, 220-240V~, 50Hz
Capacity
Btu/h
18000
18000
9000
12000
Input
W
1670
1720
1100
1400
Rated current
A
9.0
7.5
5.1
6.4
EER
Btu/w.h
10.8
10.5,
8.2
8.6
Capacity
Btu/h
20000
19000
12000
15000
Input
W
1830
1790
1400
1700
Rated current
A
9.9
7.7
6.3
7.5
COP
W/W
3.2
3.11
8.6
8.8
A
15.5
18
12
18
A
Power supply
Cooling
Heating
Max. current
Starting current
9.0
9.0
Model
BA160X2CS-20KU
BA160X2CS-20KU
BG130X1C-20FZ
BG130X1C-20FZ
Type
Rotary
Rotary
Rotary Inverter
Rotary Inverter
Brand
Compressor
Indoor \fan motor
TOSHIBA
TOSHIBA
TOSHIBA
TOSHIBA
Capacity
Btu/h
16140
16140
9468
9468
Input
W
1630
1630
890
890
Rated current(RLA)
A
10.95
10.95
5.7
5.7
Locked rotor Amp(LRA) A
55
55
Thermal protector
CS-74
CS-74
CS-74
CS-74
Capacitor
uF
No
No
No
No
Refrigerant oil
ml
750
750
370
370
Model
RPG28C
RPG28C
RPG13H
RPG13D
Brand
Welling
Welling
Welling
Welling
Input
W
45
55
39.5
44
Capacitor
uF
1.5
1.5
1.2
1.5
Speed(hi/mi/lo)
r/min
1200/1150/1000
1140/1060/980
1250/1100/850
1180/1000/850
Indoor air flow (Hi/Mi/Lo)
m3/h
800/700/600
800/700/600
520/460/410
580/500/420
Indoor noise level (Hi/Mi/Lo)
dB(A)
44/40/37
44/40/37
40/38/35
40/38/35
YDK53-6K
YDK53-6C
YDK24-6F
YDK25-6-3
Model
Brand
Welling
Welling
Welling
Welling
Input
W
130
125
56
75
Capacitor
uF
3.0
3.0
2.5
2.0
Speed
r/min
750
800
800
900
Outdoor air flow
m3/h
2500
2500
1600
1700
Outdoor noise level
dB(A)
58
58
58
58
Refrigerant type R410A
g
1650
1770
840
1200
Liquid side/ Gas side
mm
Ф6.35/Ф12.7
Ф6.35/Ф12.7
Ф6.35/Ф9.53
Ф6.35/Ф12.7
Max.
pipe length
m
10
15
10
10
Max.
in level
m
5
8
5
5
Operation temp
℃
17-30
17-30
17-30
17-30
Ambient temp
℃
-15-43
-15-43
-15-50
-15-50
Application area
m2
28-45
28-45
Outdoor fan motor
Refrigerant piping
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are normally
somewhat different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product improvement.
9
Service manual
Inverter Eco
Model
Power supply
Capacity
Input
Cooling
Rated current
EER
Capacity
Heating
Input
Rated current
Model
Type
Brand
Compressor
Refrigeran Type
Capacitor
Refrigerant oil
Model
Indoor fan
Brand
motor
Capacitor
Speed(hi/mi/lo)
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Model
Outdoor fan
Brand
motor
Capacitor
Outdoor noise level
Refrigerant type R407C
Liquid side/ Gas side
Refrigerant
Max. pipe length
piping
Max. in level
Operation temp
Ambient temp
Application area
MSG-07HRIN2
Ph-V-Hz 1, 220-240V~, 50Hz
Btu/h
W
A
Btu/w.h
Btu/h
W
A
uF
ml
uF
r/min
m3/h
dB(A)
uF
dB(A)
g
mm
m
m
℃
℃
m2
7000
780
4.8
9.0
9000
940
4.4
BG130X1C-20FZ
Rotary Inverter
TOSHIBA
POE
No
370
RPG13H
Welling
1.2
1050/950/750
500/410/320
35/32/26
YDK23-6-3
Welling
2.5
51
800
Ф6.35/Ф9.53
10
5
17-30
-15-45
14-18
MSG-09HRIN2
1, 220-240V~, 50Hz
9000
990
4.5
9.0
12000
1240
5.5
BG130X1C-20FZ
Rotary Inverter
TOSHIBA
POE
No
370
RPG13H
Welling
1.2
1100/1000/800
520/430/330
36/32/26
YDK23-6-3
Welling
2.5
51
800
Ф6.35/Ф9.53
10
5
17-30
-15-45
18-24
MSG-12HRIN2
1, 220-240V~,
50Hz
12000
1340
5.8
9.0
15000
1560
6.8
BG130X1C-20FZ
Rotary Inverter
TOSHIBA
POE
No
370
RPG13C
Welling
1.5
1060/900/800
560/460/380
36/32/26
YDK23-6-3
Welling
2.5
53
1150
Ф6.35/Ф12.7
10
5
17-30
-15-43
20-30
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are normally
somewhat different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product improvement.
10
Service manual
Inverter star
Model
MSG-09HRI
Power supply
Ph-V-Hz 1, 220-240V~, 50Hz
Capacity
Cooling
50Hz
MSG-24HRI
1, 220-240V~, 50Hz
9000
12000
21000
24000
Input
W
1080
1380
2450
2700
Rated current
A
6.0
7.4
12.0
13.2
Btu/w.h
8.3
8.7
8.6
8.9
Btu/h
12000
15000
28000
30000
Input
W
1350
17900
2800
3030
Rated current
A
7.2
10.5
14.0
15.1
W/W
2.6
2.5
2.9
2.9
2PV132N7BC02
2PV132N7BC02
BH240X2CS-20KU
BH240X2CS-20KU
Capacity
COP
Model
Type
Rotary
Rotary
Rotary
Rotary
Brand
GD Matsushita
GD Matsushita
MIDEA TOSHIBA
MIDEA TOSHIBA
Capacity
Btu/h
9500
9500
Input
W
855
855
Rated current(RLA)
A
5.1
Compressor
Thermal protector
CS-7LN120
5.1
CS-7LN120
Capacitor
uF
No
No
No
No
Refrigerant oil
ml
450
450
750
750
Model
RPG13H
RPG20A
YDK36-4G
YDK36-4G
Brand
Welling
Welling
Welling
Welling
Indoor
fan motor
1, 220-240V~, 50Hz
MSG-21HRI
1, 220-240V~,
Btu/h
EER
Heating
MSG-12HRI
Input
W
36.5
35
70
70
Capacitor
uF
1.2
1.0
3.0
3.0
Speed(hi/mi/lo)
r/min
1100/1020/950
1060/900/800
1150/1050/950
Indoor air flow (Hi/Mi/Lo)
m3/h
500/430/330
540/460/380
1150/1050/950
Indoor noise level (Hi/Mi/Lo)
dB(A)
36/32/26
38/34/28
45/42/39
45/42/39
YDK20-6G
YDK25-6-3
YDK53-6K
YDK53-6K
Welling
Welling
Welling
Welling
70
75
2.5
2.5
Model
Brand
Outdoor fan
motor
Input
W
Capacitor
uF
2.5
2
Speed
r/min
800
890
1150/1050/950
1150/1050/950
Outdoor noise level
dB(A)
50
53
55
55
Refrigerant type R22A
g
870
1120
1820
1820
mm
Ф6.35/Ф9.53
φ6.35/φ12.7
Ф6.35/Ф16
Ф6.35/Ф16
m
10
10
20
20
Refrigerant
piping
Liquid side/ Gas side
Max.
pipe length
Max.
in level
m
5
5
10
10
℃
17-30
17-30
17-30
17-30
Ambient temp
℃
-15-45
-15-45
-15-43
-15-43
Application area
m2
18-24
20-30
35-50
40-56
Operation temp
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are normally
somewhat different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product improvement.
11
Service manual
5.
12
Refrigerant cycle diagram
Service manual
6.
6.1
Operation limits
Cooling operation
Outdoor unit air temp.℃ DB
Indoor air temp. ℃ DB
Note: The chart is the result from the continuous operation under constant air temperature conditions.
However, excludes the initial pull-down stage.
6.2
Heating operation
Indoor air temp. ℃ DB
Outdoor unit air temp.℃ DB
Note: The chart is the result from the continuous operation under constant air temperature conditions.
However, excludes the initial pull-down stage.
13
Service manual
7.
7.1.
Schematic diagram and Wiring diagram
Schematic diagram
7.1.1 Display board(MSH-18HRIN1,MSC-18HRIN1)
1
2
3
4
6
5
+5
R7
221
D
Q4
9012
R8
+5
4
5
7
6
5
4
3
2
1
FROM INDOOR PCB
Vcc
Dsb
Q7
Q0
Q6
Q1
Q5
Q2
Q4
Q3
MR
GND
CP
14
13
12
LED1
DISP2
11
LED2
LED3
10
9
8
74HC164
8LED
CN1
C
7
R12 391
R13 391
R14 391
R11 391
6
Dsa
R9 221
3
R17 221
2
R15 221
R16 391
1
D
102
104
C1
IC1
C
CLK
DATA
DIGI
+5V
REMOTE
GND
+5
DEF R
TIME Y
+5
E2
47u/16V
C3
C6
104
102
AUTO G
R6
221
Q1
9012
R5
102
+5
Q2
9013
R1 102
R10
151
REC1
R4 221
dig.1 g
a
f
b
B
DISP1
+5
R3 221
c dig.2
d dp e
B
C5
E4
104
10u/16V
Q3
9012
R2 102
A
A
Size
B
FCSM No.
DWG No.
Rev
Scale
Sheet
0 of 0
1
2
3
4
5
6
7.1..2 Indoor main PCB(MSH-18HRIN1,MSC-18HRIN1)
1
2
3
4
5
6
7
8
CN1
1
R2 51/1W
C2
333/250VAC
T1
3
1
TR1
BT131
R11 C12
100K 104
G
4
5
D
R4
R5
D5
11K/2W 11K/2W
DZ2
12V
R1
2K
FAN_IN
4
N
+5V
R3
IC1
PC817
ZR1
14D681K
STEP2
CN9
STEP3
1
560
2
N
PTC1
82RM
INDOORFAN'
1
CN2
2
TRANS_IN
2
3
4
STEP4
2
1
3
C5
333/250VAC
IC4
1
STEP1
L
2
IN4007
t
C25
1.2(1.5)uF/450V
3.15A/250V
E2
470uF/25V
T2
L1
CN10
FUSE1
L
2
5
BUZZ
6
INDOORFAN
7
CHUCHEN
8
CN8
IN1
OUT1
IN2
OUT2
IN3
OUT3
IN4
OUT4
IN5
OUT5
IN6
OUT6
IN7
OUT7
VSS
VDD
16
1
2
3
4
5
15
14
+12V
12
104
10
9
4 IC5
D2
C3
D3
1
2
7805
Vin
C4
E3
104
E1
B
IC3
+12V
3
Vout
3
104
1000uF/25V
104
1
D7
E5
D8
ISO+12V
7812
Vin
GND
14.5VAC 200mA
17
18
RXD
IC7
C8
3
Vout
P-1
E6
472
C9
19
CLK
1
104
C
C1
GND
20
LED_C
21
104
2
D9
470uF/25V
22
RST
X1
1000uF/25V
23
ISOGND
2.5M
POWER CIRCUIT
R10
1M
24
25
+5V
C10
104
1 IC6
C14
D10
IN4007
4
+5V
102
R17
2K/2W
4 IC10 PC851
1
3
2
R23
5.1K
1K
+5V
B
IN4749
DZ1
24V
STEP3
R24
680
STEP4
R22
12K
DIGI_C
26
27
28
29
30
31
32
473
P24
P31
VP P
P30
RESET
P11
X2
P10
X1
1
L1
P25
ANI2
P26
ANI1
P00
ANI0
P01
P53
P02
P52
P03
P51
P04
P50
10K
1
C26
104
DATA
12
3
RST
ZERO
13
11
+5V
R13
E8
47uF/16V
REMOTE
10K
C
SDA
10
SCL
+5V
9
8
7
6
R14
R15
R16
10K
10K
10K
T2_pipe
CN7
5
T1_room
4
LED_C
DATA
DIGI_C
SELECT3
2
+5V
REMOTE
SELECT2
1
7
6
5
4
3
2
1
CLK
SW_KEY
3
CN4
R30 100
C18
102
3
2
1
SELECT1
DISPLAY
12K R39
12K
R37
R29
10K
SCL
SDA
8
7
6
5
IC11 24C04
VCC
A0
WC
A1
SCL
A2
SDA GND
104
1
2
3
4
+5V
D15
IN4148
SELECT3
SELECT2
5.1K
FAN_BACK
3
4
CN14
SW_KEY
+5V
2
1
1
T2_pipe
T1_room
R27 2K
R42
T2_pipe
C21
104
SW1
+12V
A
+5V
2
3
2
1
R34
C20
103
CN11
R35
10K
CN13
FAN_BACK
J3
2
C19
R28
10K
C23
223
C22
223
12K
10K
J2
B
+5V
Q3
9013
R38
D14 1N4007
D13 1N4007
B
R32
SELECT1
R40 5.1K
ZERO
+5V
10K
IC9 7042
2
FAN_BACK
14
E10 100uF/16V
+5V
R25
5.1K
+5V
+5V
R31
ANI3
CHUCHEN
15
2K
CN10
2
IN4007
COMMUNICATE CIRCUIT
S
R33
VSS
VDD
16
TXD
D11
CN9
1
2
A
14
P32
R26
100uF/35V
1
P33
P23
9013
CN8
J1
P20
P22
uPD789189(32P)
11K/2W
N
E9
+5V
P21
R21
11K/2W
R19
100K
C13
STEP2
C15
102
Q2
R20
STEP1
RXD
3
2
INDOORFAN
E7
100uF/16V
BUZZ
R43
R18
5.1K
C16
471/250V
PC817
ISOGND
IC8
470uF/16V
TXD
IN4007*4
CN6
D
C11
E4
2200uF/25V
D6
CN12
1
2
Q1
9013
2
ISO+12V
2K
CORTROL CIRCUIT
D4
TRANS_OUT
R9
5.1K
1
+12V
+5V
Vout
GND
4
3
2
1
7812
Vin
2
1
GND
D1
1
PC817
R7
1K
IC/ULN2003
R6
IC2
IN4007*4
A
CN5
1
2
B1
R8
1K
11
INDOORFAN'
C7
14.5VAC 350mA
ISO+12V
13
5
E12
R36
8.06K
47uF/16V
6
T1_room
2K
C17
223
R41
8.06K
7
E11
47uF/16V
C24
223
A
8
Service manual
7.1.3 Outdoor main PCB(MSH-18HRIN1,MSC-18HRIN1)
1
2
3
4
6
5
+5
D
D
CZ2
10
9
8
7
6
5
4
3
2
1
Pro
+12
C25
C4
R6
U+
UV+
VW+
W-
R5
LED
R4
R29
+5V
R3
C23
R2
R1
L4
R18
+5V
LED
CN1
LED
+5V
R7
R32
VDD
51
VSS
IC2
50
PTM
49
1
IOPC5
FAN
48
3
IOPC4
4-WAY
47
5
IOPC3
46
7
IOPC2
45
9
SCIRX/IOPA1 RXD
44
11
SCITX/IOPA0 TXD
43
13
POWER
42 IOPC1
15
41 VDD
+5V
VSS
40
IOPC0
39
+5V
R16
38 EMU1
37 EMU0
XTAL2
36
XTAL1
XTAL1
35
VDD
34
+5
VSS
33
C16
C15
C14
64 63 62 61 60 59 58 57 56 55 54 53 52
1 VDD
2 VSS
3
4
5 PD0
6 CAP3/IOA5
7 CAP2/QEP1/IOPA4
8 CAP1/QEP0/IOPA3
9 VDD
TMS320F242
10 VSS
(64QFP)
11
12
13 VSSA
14 VDDA
15 ADCIN07
16 VREFHI
17 VREFLO
18 ADCIN06
19 ADCIN05
C6
R10
+5V
R8
Compress Top
IOPC6
IOPC7
TP2
TP1
Vccp
PWM1/PA6
PWM2/PA7
PWM3/PB0
Vdd
Vss
PWM4/PB1
PWM5/PB2
VDD0
2
1
+5V
R30
C7
C
R9
IPM
Pro
+5V
+5V
R31
4148
C1
D2
D5
AC-IN
D3
R21
R11
C17
ADCIN03
ADCIN02
ADCIN01
ADCIN00
NC
Vss
/RESET
TCK
TDI
TDO
TMS
/TRST
Current Detect
R22
R12
CT1
20 21 22 23 24 25 26 27 28 29 30 31 32
ADCIN04
C11
C10
FAN'
4-WAY'
2
4
6
8
10
12
14
16
CN1
11
10
9
8
7
6
5
4
3
2
1
+12V
C
AC-IN
AC-IN
FAN'
4-WAY'
GND
TXD
RXD
+5V
+12V
POWER1
CON11
J3(Comm Select)
link to power circuit
R25
+5
2
1
CN4
R34
R14
+5V
EVP
CN2
2
1
Outdoor Pipe Sensor
C20
C8
R12
+5
C9
IC1
R15
R13
C22
B
R24
C19
R33
C21
OUT-TEMP
+5
13
11
9
7
5
3
1
+5V
Outdoor Entironment Sensor
2
1
CN10
+5
14
12
10
8
6
4
2
B
R23
1
2
3
R36
R35
C13
C12
A
A
1
2
3
4
5
6
7.1.4 Outdoor power PCB(MSH-18HRIN1,MSC-18HRIN1)
3
2
1
4
DB2
Filter
L
FS1
20A/250VAC
N
474/250V
C1 14D681
RL3-4
474/250V
H38-20A-6MH
C5
472
T1
C2
FS2
3.15A/250VAC
AC
V+
AC
V-
AC
V-
L1
C6
POWER1
RL3
560uF/400V *6
L2 R1812
R18J04D
R8025
P-5
C7
C82
C81
C83
C84
C85
P-4
C8
C86
103
50uF/450V
103
DB1
14D681
P-2
AS1
ZMR1
D
V+
L3
+12V
C4
472
ZMR2
AC
t
PTC1
IPM BOARD
D
P-6
P-3
P-1
C
C
T3
CN1
B
AC-IN
H.FAN
L.FAN
4-WAY
GND
TXD
RXD
+5V
+12V
POWER1
CN4
FAN.H
R30
3.5K/7W
2
CON11
R28
12K
POWER1
IC5
PC851
3
4
1
C23
471/250V
D1
IN4007
FAN
11
10
9
8
7
6
5
4
3
2
1
CN7
+12V
CAP
RL2
C15
2.5U
CN5
COM
S
+5
RXD
3
IC6
PC817
RL1
2
C21
+5V
4
4-WAY
TXD
+12V
1
B
CN6
R26
5.1K
104
4-WAY
A
A
Power Circuit
1
15
2
3
4
Service manual
7.1..5
16
Indoor main PCB(Inverter Eco)
Service manual
7.1.6
17
Outdoor main PCB(Inverter Eco)
Service manual
7.2.
Wiring diagram
7.2.1 MSH-18HRDN1
18
Service manual
7.2.2 MSC-18HRIN1
19
Service manual
7.2.3 MSE-09HRIN2, MSE-12HRIN2
20
Service manual
7.2.4 MSG-07HRIN2, MSG-09HRIN2, MSG-12HRIN2
1 Indoor unit 7/9K
2
21
Indoor unit 12K
Service manual
3. Outdoor unit
22
Service manual
8.
8.1
8.2
Installation details
Wrench torque sheet for installation
Outside diameter
Torque
mm
inch
Kg.m
φ6.35
1/4
1.8
φ9.52
3/8
4.2
φ12.7
1/2
5.5
φ15.88
5/8
6.6
φ19.05
3/4
6.6
Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Grade
8.3
Capacity
Btu/h
7k~12K
18K~28K
Unit
7K
9K
12K
16K
18K
mm2
1.0
1.0
1.5
2.5
2.5
Pipe length and the elevation
Pipe size
Standard
length
(m)
Max.
Elevation
B (m)
Max.
Elevation
B (m)
Additional
refrigerant
(g/m)
GAS
LIQUID
3/8’’ (φ9.52)
1/4’’ (φ6.35)
5
5
10
30
1/2’’ (φ12.7)
1/4’’ (φ6.35)
5
5
10
30
1/2’’ (φ12.7)
1/4’’ (φ6.35)
5
8
15
30
5/8’’ (φ15.88)
1/4’’ (φ6.35)
5
10
20
30
5/8’’ (φ15.88)
3/8’’ (φ9.52)
5
10
20
65
In case that
more than 5m.
Caution:
Capacity is base on standard length and maximum allowance length is base of reliability.
Oil trap should be install per 5-7 meters.
23
Service manual
8.4
Air purging of the piping and indoor unit
Required tools:
Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector.
Note:
The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will
affect the compressor, reduce the cooling capacity, and could lead to a malfunction of unit.
Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it
prevents the gas leakage from the refrigeration cycle.
Procedure
1. Recheck the piping connections.
2. Open the valve stem of the 2-way valve
counterclockwise approximately 90’, wait
10 seconds, and then set it to closed
position.
ƒ Be sure to use a hexagonal wrench to operate
the valve stem
3. Check for gas leakage.
ƒ Check the flare connection for gas leakage
4. Purge the air from the system.
ƒ Set the 2-way valve to the open position and
remove the cap from the 3-way valve’s
service port.
ƒ Using the hexagonal wrench to press the
valve core pin, discharge for three seconds
and then wait for one minute.
5. Use torque wrench to tighten the service
port cap to a torque of 1.8 kg.m. (18n.m)
24
6. Set the 3-way valve to the opened
position.
7. Mounted the valve stem nuts to the 2-way
and 3-way valves.
8. Check for gas leakage.
ƒ At this time, especially check for gas leakage
from the 2-way and 3-way stem nuts, and
from the service port.
Caution:
If gas leakage is discovered in step (3) above,
take the following measures.
If the leaks stop when the piping connections are
tightened further, continue working from step (4).
If the gas leaks do not stop when the connections
are retightened, repair the location of the leak,
discharge all of the gas through the service port,
and then recharge with the specified amount of
gas from a gas cylinder.
Service manual
8.5
Pumping down (Re-installation)
Procedure
1. Confirm that both the 2-way and 3-way valves are set to the opened position.
ƒ Remove the valve stem caps and confirm that the valve stems are in the opened position.
ƒ Be sure to use a hexagonal wrench to operate the valve stems.
2. Operate the unit for 10 to 15 minutes.
3. Stop operation and wait for 3 minutes, then connect the charge set to the service port of the
3-way valve.
ƒ Connect the charge hose with the push pin to the gas service port.
4. Air purging of the charge hose.
ƒ Open the low-pressure valve on the charge set slightly to purge air from the charge hose.
5. Set the 2-way valve to the close position.
6. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa.
7. Immediately set the 3-way valve to the closed position.
ƒ Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa.
8. Disconnect the charge set, and amount the 2-way and 3-way valve’s stem nuts and service
port caps.
ƒ Use a torque wrench to tighten the service port cap to a torque of 1.8 kg.m.
ƒ Be sure to check for gas leakage.
25
Service manual
8.6
Re-air purging (Re-installation)
Procedure:
1. Confirm that both the 2-way and 3-way valves are set to the closed position.
2. Connect the charge set and a charging cylinder to the service port of the 3-way valve.
ƒ Leave the valve on the charging cylinder closed.
3. Air purging.
ƒ Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut
on the 2-way valve approximately 45’ for 3 seconds then closing it for 1 minutes; repeat 3 times.
ƒ After purging the air, use a torque wrench to tighten the flare nut to on the 2-way valve.
4. Check the gas leakage.
ƒ Check the flare connections for gas leakage.
5. Discharge the refrigerant.
ƒ Close the valve on the charging cylinder and discharge the refrigerant until the gauge indicate 0.3 to
0.5 Mpa.
6. Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to
the open position.
ƒ Be sure to use a hexagonal wrench to operate the valve stems.
7. Mount the valve stems nuts and the service port cap.
ƒ Be sure to use a torque wrench to tighten the service port cap to a torque 18N.m.
ƒ Be sure to check the gas leakage.
26
Service manual
8.7
Balance refrigerant of the 2-way, 3-way valves
Procedure:
1. Confirm that both the 2-way and 3-way valves are set to the open position.
2. Connect the charge set to the 3-way valve’s service port.
ƒ Leave the valve on the charge set closed.
ƒ Connect the charge hose with the push pin to the service port.
3. Open the valves (Low side) on the charge set and discharge the refrigerant until the gauge
indicates 0.05 to 0.1 Mpa.
ƒ If there is no air in the refrigeration cycle [the pressure when the air conditioner is not running is
higher than 0.1Mpa, discharge the refrigerant until the gauge indicates 0.05 to 0.1 Mpa. If this is the
case, it will not be necessary to apply a evacuation.
ƒ Discharge the refrigeration gradually; if it is discharged too suddenly, the refrigeration oil sill be
discharged.
27
Service manual
8.8
Evacuation
Procedure:
1. Connect the vacuum pump to the charge set’s centre hose.
2. Evacuation for approximately one hour.
ƒ Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmHg) [vacuum of 4 mmHg or less].
3. Close the valve (Low side) on the charge set, turn off the vacuum pump, and confirm that the
gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).
4. Disconnect the charge hose from the vacuum pump.
ƒ Vacuum pump oil, if the vacuum pump oil becomes dirty or depleted, replenish as needle.
28
Service manual
8.9
Gas charging
Procedure:
1. Connect the charge hose to the charging cylinder.
ƒ Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom
of the cylinder.
2. Purge the air from the charge hose.
ƒ Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the
air (be careful of the liquid refrigerant).
3. Open the valves (Low side) on the charge set and charge the system with liquid refrigerant.
ƒ If the system cannot be charge with the specified amount of refrigerant, if can be charged with a little
at a time (approximately 150g each time0 while operating the air conditioner in the cooling cycle;
however, one time is not sufficient, wait approximately 1 minute and then repeat the
procedure.(pumping down-pin).
4. Immediately disconnect the charge hose from the 3-way valve’s service port.
ƒ Stopping partway will allow the refrigerant to be discharged.
ƒ If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the
air conditioner before disconnecting the hose.
5. Mounted the valve stem caps and the service port
ƒ Use torque wrench to tighten the service port cap to a torque of 18N.m.
ƒ Be sure to check for gas leakage.
29
Service manual
ƒ
9.
Pressure table
Note:
The pressure data is from 3 way valve, the pressure data are pressure above atmosphere.
D: Dry bulb temp.
W: Wet bulb temp.
9.1 MSH-18HRIN1
Cooling mode
Indoor Conditions
Outdoor temperature (Dry bulb temp)
Pressure
25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
21ºC D15ºC W Pressure( kg/cm2 ) 6.6
6.8
7.0
7.3
7.6
8.0
2
7.0
7.1
7.7
8.3
8.7
2
27ºC D19ºC W Pressure( kg/cm ) 7.1
7.2
7.3
7.8
8.6
9.3
32ºC D23ºC W Pressure( kg/cm2 ) 7.1
7.4
7.6
8.4
9.4
9.8
24ºC D17ºC W Pressure( kg/cm ) 6.8
Heating mode
Outdoor temperature (Dry bulb temp)
Indoor Conditions
15ºC
18ºC
12ºC D 7ºC D 0ºC D -4ºC D -7ºC D -15ºC D
11ºC W 6ºC W -1ºC W -6ºC W -9ºC W -xºC W
Pressure
Pressure( kg/cm2 ) 32.5
34.5
34.0
31.0
28.5
27.5
2
34.5
35.5
32.5
29.5
28.0
2
Pressure( kg/cm ) 35.0
20ºC
Pressure( kg/cm ) 36.5
35.5
36.0
33.5
30.0
28.5
22ºC
Pressure( kg/cm2 ) 36.5
37.0
36.5
35.0
32.5
29.5
9.2 MSC-18HRIN1
Cooling mode
Indoor Conditions
Outdoor temperature (Dry bulb temp)
Pressure
25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
21ºC D15ºC W Pressure( kg/cm2 ) 6.6
6.8
7.0
7.3
7.6
8.0
2
7.0
7.1
7.7
8.3
8.7
2
27ºC D19ºC W Pressure( kg/cm ) 7.1
7.2
7.3
7.8
8.6
9.3
32ºC D23ºC W Pressure( kg/cm2 ) 7.1
7.4
7.6
8.4
9.4
9.8
24ºC D17ºC W Pressure( kg/cm ) 6.8
Heating mode
Indoor Conditions
12ºC D 7ºC D 0ºC D -4ºC D -7ºC D -15ºC D
11ºC W 6ºC W -1ºC W -6ºC W -9ºC W -xºC W
Pressure
15ºC
Pressure( kg/cm2 ) 32.5
34.5
34.0
31.0
28.5
27.5
18ºC
Pressure( kg/cm2 ) 35.0
20ºC
22ºC
30
Outdoor temperature (Dry bulb temp)
34.5
35.5
32.5
29.5
28.0
2
35.5
36.0
33.5
30.0
28.5
2
37.0
36.5
35.0
32.5
29.5
Pressure( kg/cm ) 36.5
Pressure( kg/cm ) 36.5
Service manual
10. Capacity table
10.1
MSH-18HRIN1
COOLING
OUTDOOR TEMPERATURE DRY
Indoor
Conditions
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
21ºC
25ºC
30ºC
35ºC
40ºC
45ºC
50ºC
Total capacity kW
3.513
3.903
4.550
4.849
4.177
3.251
2.333
Sensitive capacity kW
2.635
2.927
3.413
3.738
3.133
2.438
1.749
Input kW.
0.696
1.050
1.607
2.163
1.976
1.810
1.654
Total capacity kW
4.071
4.30
4.938
5.268
4.08
3.625
2.667
Sensitive capacity kW
3.052
3.322
3.703
4.051
3.381
2.719
2.000
Input kW.
0.731
1.183
1.621
2.106
2.012
1.851
1.680
Total capacity kW
4.362
4.921
5.205
5.287
5.024
4.213
3.271
Sensitive capacity kW
3.287
3.690
3.958
4.110
3.768
3.160
2.461
Input kW.
0.721
1.196
1.647
1.700
2.077
1.902
1.700
Total capacity kW
4.931
5.409
6.092
6.319
5.613
4.782
3.500
Sensitive capacity kW
3.698
4.056
4.569
4.839
4.207
3.586
Input kW.
0.704
1.206
1.755
2.213
2.118
1.962
2.625
1.720
HEATING
24ºC
D
18ºC
W
Indoor
Conditions
15ºC
18ºC
20ºC
22ºC
27ºC
31
OUTDOOR CONDITIONS
12ºC
D
11ºC
W
7ºC D
6ºC
W
4ºC D
3ºC
W
0ºC D
-1ºC
W
-5ºC D
-6ºC
W
-7ºC D
-8ºC
W
-15ºC
D
-16ºC
W
Capacity kW
7.355
7.108
6.663
6.208
5.265
4.621
4.428
3.482
Input kW.
1.691
1.883
1.850
2.271
2.406
2.283
2.135
2.026
Capacity kW
7.310
7.021
6.582
6.133
5.255
4.689
4.507
3.638
Input kW.
1.780
1.947
1.875
2.571
2.730
2.81
2.378
2.180
Capacity kW
7.280
6.897
5.987
5.802
5.394
4.740
4.563
3.744
Input kW.
1.860
2.073
1.898
2.650
3.082
2.810
2.550
2.313
Capacity kW
7.241
6.821
5.947
5.750
5.400
4.768
4.592
3.738
Input kW.
1.993
2.231
2.173
2.700
2.980
2.693
2.487
2.308
Capacity kW
7.103
6.667
5.969
5.883
5.418
4.807
4.671
3.714
Input kW.
2.106
2.312
2.422
2.691
2.892
2.611
2.458
2.306
Service manual
10.2
MSC-18HRIN1
COOLING
OUTDOOR TEMPERATURE DRY
Indoor
Conditions
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
21ºC
25ºC
30ºC
35ºC
40ºC
45ºC
50ºC
Total capacity kW
3.513
3.903
4.550
4.849
4.177
3.251
2.333
Sensitive capacity kW
2.635
2.927
3.413
3.738
3.133
2.438
1.749
Input kW.
0.696
1.050
1.607
2.163
1.976
1.810
1.654
Total capacity kW
4.071
4.30
4.938
5.268
4.08
3.625
2.667
Sensitive capacity kW
3.052
3.322
3.703
4.051
3.381
2.719
2.000
Input kW.
0.731
1.183
1.621
2.106
2.012
1.851
1.680
Total capacity kW
4.362
4.921
5.205
5.287
5.024
4.213
3.271
Sensitive capacity kW
3.287
3.690
3.958
4.110
3.768
3.160
2.461
Input kW.
0.721
1.196
1.647
1.700
2.077
1.902
1.700
Total capacity kW
4.931
5.409
6.092
6.319
5.613
4.782
3.500
Sensitive capacity kW
3.698
4.056
4.569
4.839
4.207
3.586
2.625
Input kW.
0.704
1.206
1.755
2.213
2.118
1.962
1.720
-15ºC
D
-16ºC
W
HEATING
24ºC
D
18ºC
W
Indoor
Conditions
15ºC
18ºC
20ºC
22ºC
27ºC
32
OUTDOOR CONDITIONS
12ºC
D
11ºC
W
7ºC D
6ºC
W
4ºC D
3ºC
W
0ºC D
-1ºC
W
-5ºC D
-6ºC
W
-7ºC D
-8ºC
W
Capacity kW
7.355
7.108
6.663
6.208
5.265
4.621
4.428
3.482
Input kW.
1.691
1.883
1.850
2.271
2.406
2.283
2.135
2.026
Capacity kW
7.310
7.021
6.582
6.133
5.255
4.689
4.507
3.638
Input kW.
1.780
1.947
1.875
2.571
2.730
2.81
2.378
2.180
Capacity kW
7.280
6.897
5.987
5.802
5.394
4.740
4.563
3.744
Input kW.
1.860
2.073
1.898
2.650
3.082
2.810
2.550
2.313
Capacity kW
7.241
6.821
5.947
5.750
5.400
4.768
4.592
3.738
Input kW.
1.993
2.231
2.173
2.700
2.980
2.693
2.487
2.308
Capacity kW
7.103
6.667
5.969
5.883
5.418
4.807
4.671
3.714
Input kW.
2.106
2.312
2.422
2.691
2.892
2.611
2.458
2.306
Service manual
10.3
MSG-09HRI
SUMMER Cooling mode
Indoor
Conditions
21ºC D
Total capacity kW
15ºC W
Sensitive capacity kW
Input kW.
24ºC D
Total capacity kW
17ºC W
Sensitive capacity kW
Input kW.
27ºC D
Total capacity kW
19ºC W
Sensitive capacity kW
Input kW.
32ºC D
Total capacity kW
23ºC W
Sensitive capacity kW
Input kW.
WINTER
Indoor
Conditions
Capacity kW
Input kW.
Capacity kW
Input kW.
Capacity kW
Input kW.
Capacity kW
Input kW.
15ºC
18ºC
20ºC
22ºC
10.4
WINTER
Indoor
Conditions
18ºC
20ºC
22ºC
33
25ºC
30ºC
35ºC
2.50
2.35
2.17
1.82
1.75
1.64
0.86
0.90
0.94
2.71
2.58
2.42
1.99
1.93
1.84
0.88
0.93
0.97
2.88
2.75
2.60
2.19
2.12
2.03
0.91
0.96
1.00
3.21
3.08
2.98
2.47
2.40
2.34
0.95
1.00
1.04
OUTDOOR CONDITIONS
12ºC D
7ºC D
4ºC D
11ºC W
6ºC W
3ºC W
3.46
3.03
2.78
1.05
0.96
0.89
3.39
2.98
2.71
1.08
0.97
0.90
2.93
3.36
2.68
0.98
1.11
0.93
3.33
2.90
2.64
1.15
0.99
0.95
40ºC
45ºC
50ºC
2.00
1.52
1.02
2.28
1.75
1.05
2.46
1.93
1.08
2.77
2.19
1.12
1.87
1.43
1.13
2.13
1.64
1.16
2.29
1.80
1.20
2.53
2.02
1.25
1.73
1.34
1.17
1.96
1.52
1.20
2.11
1.67
1.24
2.38
1.93
1.29
0ºC D
-1ºC W
2.44
0.82
2.35
0.84
2.29
0.86
2.26
0.90
-4ºC D
-6ºC W
2.10
0.72
1.99
0.74
1.89
0.76
1.85
0.81
-7ºC D
-8ºC W
1.84
0.65
1.73
0.66
1.56
0.70
1.54
0.72
MSG-12HRI
SUMMER Cooling mode
Indoor
Conditions
21ºC D
Total capacity kW
15ºC W
Sensitive capacity kW
Input kW.
24ºC D
Total capacity kW
17ºC W
Sensitive capacity kW
Input kW.
27ºC D
Total capacity kW
19ºC W
Sensitive capacity kW
Input kW.
32ºC D
Total capacity kW
23ºC W
Sensitive capacity kW
Input kW.
15ºC
OUTDOOR TEMPERATURE DRY
Capacity kW
Input kW.
Capacity kW
Input kW.
Capacity kW
Input kW.
Capacity kW
Input kW.
OUTDOOR TEMPERATURE DRY
25ºC
30ºC
35ºC
40ºC
45ºC
50ºC
3.36
2.46
1.05
3.64
2.68
1.09
3.88
2.95
1.12
4.32
3.33
1.16
3.16
2.36
1.11
3.48
2.59
1.15
3.71
2.85
1.18
4.14
3.23
1.23
2.93
2.21
1.16
3.25
2.47
1.19
3.50
2.73
1.23
4.01
3.15
1.28
2.69
2.05
1.25
3.07
2.35
1.29
3.31
2.60
1.33
3.73
2.94
1.38
2.52
1.92
1.39
2.86
2.21
1.43
3.08
2.43
1.48
3.41
2.73
1.54
2.33
1.80
1.43
2.64
2.05
1.48
2.84
2.25
1.53
3.21
2.60
1.59
0ºC D
-1ºC W
3.17
1.08
3.06
1.11
2.98
1.14
2.94
1.18
-4ºC D
-6ºC W
2.73
0.94
2.59
0.97
2.45
1.00
2.41
1.06
-7ºC D
-8ºC W
2.40
0.86
2.25
0.87
2.03
0.92
2.00
0.95
OUTDOOR CONDITIONS
12ºC D
7ºC D
4ºC D
11ºC W
6ºC W
3ºC W
4.50
3.94
3.61
1.38
1.26
1.17
4.41
3.87
3.52
1.42
1.28
1.19
3.81
4.37
3.48
1.29
1.46
1.23
4.33
3.77
3.43
1.51
1.30
1.24
Service manual
10.5
MSG-21HRI
SUMMER Cooling mode
Indoor
Conditions
21ºC D
Total capacity kW
15ºC W
Sensitive capacity kW
Input kW.
24ºC D
Total capacity kW
17ºC W
Sensitive capacity kW
Input kW.
27ºC D
Total capacity kW
19ºC W
Sensitive capacity kW
Input kW.
32ºC D
Total capacity kW
23ºC W
Sensitive capacity kW
Input kW.
WINTER
Indoor
Conditions
Capacity kW
Input kW.
Capacity kW
Input kW.
Capacity kW
Input kW.
Capacity kW
Input kW.
15ºC
18ºC
20ºC
22ºC
10.6
WINTER
Indoor
Conditions
18ºC
20ºC
22ºC
34
25ºC
30ºC
35ºC
40ºC
45ºC
50ºC
5.92
4.32
1.97
6.41
4.71
2.03
6.83
5.19
2.09
7.60
5.85
2.18
5.56
4.15
2.08
6.12
4.56
2.14
6.52
5.02
2.21
7.29
5.69
2.30
5.15
3.89
2.16
5.72
4.35
2.23
6.16
4.80
2.30
7.05
5.54
2.39
4.74
3.60
2.33
5.41
4.14
2.41
5.82
4.57
2.48
6.56
5.18
2.58
4.43
3.38
2.59
5.04
3.88
2.68
5.43
4.28
2.76
6.00
4.80
2.87
4.11
3.16
2.68
4.65
3.60
2.77
5.00
3.95
2.85
5.65
4.58
2.97
0ºC D
-1ºC W
5.73
2.01
5.52
2.07
5.39
2.11
5.31
2.19
-4ºC D
-6ºC W
4.93
1.76
4.68
1.81
4.43
1.86
4.35
1.98
-7ºC D
-8ºC W
4.33
1.59
4.05
1.62
3.67
1.70
3.61
1.77
OUTDOOR CONDITIONS
12ºC D
7ºC D
4ºC D
11ºC W
6ºC W
3ºC W
8.12
7.12
6.52
2.58
2.34
2.18
7.97
6.99
6.36
2.64
2.38
2.21
6.88
7.90
6.29
2.40
2.72
2.28
7.82
6.80
6.19
2.81
2.42
2.31
MSG-24HRI
SUMMER Cooling mode
Indoor
Conditions
21ºC D
Total capacity kW
15ºC W
Sensitive capacity kW
Input kW.
24ºC D
Total capacity kW
17ºC W
Sensitive capacity kW
Input kW.
27ºC D
Total capacity kW
19ºC W
Sensitive capacity kW
Input kW.
32ºC D
Total capacity kW
23ºC W
Sensitive capacity kW
Input kW.
15ºC
OUTDOOR TEMPERATURE DRY
Capacity kW
Input kW.
Capacity kW
Input kW.
Capacity kW
Input kW.
Capacity kW
Input kW.
OUTDOOR TEMPERATURE DRY
25ºC
30ºC
35ºC
40ºC
45ºC
50ºC
6.76
4.93
2.35
7.31
5.38
2.43
7.79
5.92
2.50
8.68
6.68
2.60
6.35
4.74
2.48
6.99
5.21
2.56
7.44
5.73
2.64
8.32
6.49
2.75
5.88
4.44
2.59
6.53
4.96
2.67
7.03
5.48
2.75
8.05
6.32
2.86
5.41
4.11
2.79
6.17
4.72
2.88
6.64
5.22
2.97
7.49
5.91
3.09
5.05
3.86
3.10
5.75
4.43
3.20
6.19
4.88
3.30
6.84
5.47
3.43
4.69
3.61
3.21
5.30
4.11
3.31
5.71
4.51
3.41
6.45
5.22
3.55
0ºC D
-1ºC W
6.58
2.31
6.35
2.37
6.19
2.42
6.10
2.51
-4ºC D
-6ºC W
5.67
2.01
5.38
2.07
5.09
2.13
5.01
2.27
-7ºC D
-8ºC W
4.98
1.83
4.66
1.85
4.22
1.95
4.15
2.03
OUTDOOR CONDITIONS
12ºC D
7ºC D
4ºC D
11ºC W
6ºC W
3ºC W
9.33
8.19
7.50
2.95
2.68
2.50
9.16
8.04
7.31
3.03
2.73
2.53
7.91
9.08
7.23
2.75
3.11
2.61
9.00
7.82
7.12
3.22
2.78
2.65
Service manual
11. Electronic function
11.1. Display board
1
2
3
4
5
6
11.1.1. AUTO indicator
This indicator illuminates when the air conditioner is in AUTO operation.
11.1.2. TIMER indicator
This indicator illuminates when TIMER is set ON/OFF.
11.1.3. PRE.-DEF. Indicator (For Cooling & Heating models only)
This indicator illuminates when the air conditioner starts defrosting automatically or when the warm
air control feature is activated in heating mode.
11.1.4. TEMPERATURE indicator
Usually it displays the temperature settings. When change the setting temperature, this indicator
begins to flash, and stops 20 seconds later.
It displays the room temperature when the air conditioner is in FAN only operation.
When the unit stops operation, it returns to original factory settings.
Displays the malfunction code or protection code.
11.1.5. OPERATION indicator
This indicator flashes after power is on and illuminates when the unit is in operation.
11.1.6. FREQUENCY indicator
This indicator appears only when the compressor is in operation and indicates the current operating
frequency.
11.2. Protection
11.2.1. 3 minutes delay at restart for compressor.
11.2.2. Temperature protection of compressor top, compressor stops when the temp. of top of
compressor is more than 115℃, compressor runs when the temp. of top of compressor is less than
100℃.
11.2.3. Voltage protection, unit stop when the voltage is more than 260V and less than 175V.
11.2.4. Inverter module Protection, Inverter module Protection itself has a protection function against
current, voltage and temperature.
11.2.5. Sensor protection at open circuit and breaking disconnection
11.2.6. Fan Speed is out of control. When Indoor Fan Speed is too high(higher than 2100RPM)or too
low(lower than 300RPM), the unit stops and LED displays failure information and can’t return to
normal operation automatically.
11.2.7. Cross Zero signal error warning. If there is no Cross Zero signals in 4 minutes, the unit stops
and LED displays failure information and can’t return to normal operation automatically.
11.3. Fan-only mode
Fan speed is high/mid/low/ Auto
11.4. Cooling mode
11.4.1. The 4-way valve is closed at cooling mode.
11.4.2. The action of the compressor and the outdoor fan:
Condition
Compressor
T=Indoor Temp.
Room temp. up
Room temp. down
35
T> Ts+1
T<Ts+1
T> Ts
T<Ts
On
Off
On
Off
Outdoor fan
On
Off
On
Off
Service manual
11.4.3 Auto fan at cooling mode:
Condition
Indoor fan speed
T=Indoor Temp.-Setting Temp.
Room temp. up
T<1.5℃
Low
1.5℃<T<4℃
Mid.
T>4℃
High
Room temp. down
T> 3℃
High
1℃<T<3℃
Mid.
T<1℃
Low
11.4.4 Anti-freezing control to indoor evaporator at cooling mode( T: evaporator temp. )
Evaporator Temp. Compressor
0℃<T< 4℃
T< 0℃
Decrease frequency of compressor
Off
11.4.5 Current protection
Current up
Current down
Model
Current
Compressor
MSH-18HRIN1
I>18 A
Off
14.5A<I<18A
Decrease frequency of
compressor
On
Off
Decrease frequency of
compressor
On
MSH-18HRIN1
I< 12.0A
I>17.5 A
14.0A<I<17.5A
I< 11.5A
11.4.6 Rated capacity test
Set mode to cooling mode
Set temp. to 17°C
Set fan speed to high speed
Push turbo button 5 times in 10 seconds.
Using special remoter controller
After 5 hours, cancel rated capacity test
Turbo function
Increasing frequency of compressor
After operating 30 minutes, return automatically to the mode and temp. previously selected.
11.5. Dehumidifying mode
11.5.1 The 4-way valve is off
11.5.2 the indoor fan is fixed in breeze speed
11.5.3 Compressor run in low frequency
11.5.4 Low room temperature protection:
11.5.5 When room temperature decreases to below 10℃, compressor and outdoor fan will stop
(indoor fan is Breeze). Dehumidifying operation will be resumed when room temperature restores to
over 12℃.
11.5.6 At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same as
that of cooling mode.
11.6. Heating mode
11.6.1. Generally, the 4-way valve is open at heating mode, but it is closed at defrosting. 4-way valve
must delay 2 minutes compared with compressor if the compressor changed into non-heating mode
or turned off. 4-way valve doesn't delay in dehumidifying mode.
11.6.2. Generally, the outdoor fan is turned off with the on-off action of compressor in heating mode,
except for the defrosting mode or the end of defrost.
11.6.3. Action of compressor and outdoor fan motor at heating mode: compressor must run for 7
minutes after starting and then judge temperature. Meanwhile other protections are still valid.
36
Service manual
Condition
Compressor
Outdoor fan
Room temp. up
T> Ts+3
Off
Off
T<Ts+3
On
On
Room temp. down
T< Ts+2
On
On
T>Ts+2
Off
Off
11.6.4. Indoor Fan actions at heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but Anti-cold wind function
prevails.
Anti-cold wind control function at heating mode
Condition （T= Indoor exchanger temp.） Indoor fan speed
Indoor exchanger temp. up
T<34℃
34℃<T<37℃
Off
Breeze
37℃<T<44℃
Low speed
T>44℃
Setting fan speed
Indoor exchanger temp. down T> 38℃
Setting fan speed
33℃<T<38℃
Low sped
24℃<T<33℃
Breeze
T<24℃
Off
When the indoor temp. gets to setting temp, indoor changes to breeze speed immediately, after 127
second, indoor fan stop.
11.6.5. Auto wind at heating mode
Condition (T=Indoor Temp.-Setting Temp.) Indoor fan speed
Room temp. up
T<1.5℃
1.5℃<T<2.5℃
T>2.5℃
Room temp. down T<1.0℃
1.0℃<T<2.0℃
T>2.0℃
11.6.6. Indoor evaporator high-temperature protection at heating mode
Condition (T= Indoor exchanger temp.) Compressor
High
Med.
Low
High
Med.
Low
T<48℃
53℃<T<63℃
T>63℃
11.6.7. The current protection
Model
Current
Compressor
Current up
18000btu/h
I>19.0 A
Off
18000btu/h
15.0.A<I<19.0A
I< 12.5A
I>18.5 A
14.5A<I<18.5A
I< 12.0A
Decrease frequency of compressor
On
Off
Decrease frequency of compressor
On
Current down
11.6.8. The temp. compensation
Jump setting in indoor PCB
J2
On
37
On
Decrease frequency of compressor
Off
On
Off
Off
J3
On
Off
On
Off
ΔT
0℃
-4℃
-2℃
0℃
Service manual
11.7. Defrosting operation (Available for heating only).
11.7.1 Defrosting condition:
11.7.1.1.
When outdoor temp. is more than 0℃,
Defrosting starts when meeting one of the following conditions,
a. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 40 minutes, and the temperature remains consecutively -4°c for more than 3 minutes,
b. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 80 minutes, and the temperature remains consecutively -2°c for more than 3 minutes
11.7.1.2.
When outdoor temp. is less than 0℃,
Defrosting starts when meeting one of the following conditions,
a. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 40 minutes, and the temperature remains consecutively -6°c for more than 3 minutes,
b. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 40 minutes, and the temperature remains consecutively -6°c for more than 3 minutes,
c. The temperature of indoor unit pipe decreases 5°c than before
11.7.1.3.
The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 120 minutes, and the temperature remains consecutively -2°c for more than 3 minutes
11.7.2 Ending condition of defrosting
If one of following conditions is satisfied, end the defrost and turn into heating mode:
a. The defrost time has reached to 10 minutes.
b. When the temperature of outdoor heat exchanger rises up to 8°C and this continues for more than 80
seconds.
c. When the temperature of outdoor heat exchanger rises up to 12°C
11.7.3 Defrosting Actions:
max. 10 minutes
60s
ON
10s
30s
Com.
OFF
ON
ON
4 way valve
OFF
ON
ON
Outdoor fan
OFF
ON
ON
Indoor fan
OFF
Breeze 10 seconds, then stop
11.7.4 Rated capacity test
Set mode to cooling mode
Set temp. to 30 °C
Set fan speed to high speed
Push turbo button 5 times in 10 seconds.
Using special remoter controller
After 5 hours, cancel rated capacity test
11.8. Outdoor low temperature protection (optional)
Factory standard unit has not this function.
Unit stops when outdoor temp. is low than -15°C and lasting time more than 60 minutes, and unit runs
again when outdoor temp. more than -12°C.
When indoor PCB J1 jump is on, this function is available.
11.9. Automatic operation mode
The air conditioner automatically selects one of the following operation modes: cooling, heating or fan
38
Service manual
only according to the temp. difference between room temp. (TA) and set temp. (TS).
TA—TS
Operation mode
TA—TS>2℃
Cooling
-1℃≤TA-TS≤+2℃
Fan-only
TA-TS<-1℃
Heating (air-only for cooling only type)
11.10. Manual switch
11.10.1
Mode changes when push this button .
Cooing modeÆ Auto modeÆUnit offÆ Cooing mode
11.10.2
At Cooing mode, after 30 minutes cooling operation whose fan speed is set as low, the A/C
operates with a setting temp. of 24℃.
11.10.3
At auto mode, the A/C operates with a set temp. of 24℃
11.11. Timer Function
11.11.1
The maximum length of timer is 24 hours and the minimum resolving power is 15 minutes.
11.11.2
Timer on: first turn off the A/C, the A/C will be automatically on at the set time.
11.11.3
Timer off: first turn on the A/C, the A/C will be automatically off at the set time
11.11.4
Timer on/off function( on time is earlier than off time): first turn off the A/C, it will be
automatically on at set time, and later be off at the set time, then unit turns on at set time.
11.11.5
Timer off/on function( off time is earlier than on time): first turn on the A/C, it will be
automatically off at set time, and later be on at the set time, then unit turns off at set time.
11.12. Sleep mode
11.12.1
It is available at cooling, heating or auto mode.
11.12.2
Cooling:
The set temperature rise 1℃ per hour. Two hours later, the set temperature will maintain as a constant
and the fan speed is kept at low speed.
11.12.3
Heating:
The set temperature decrease 1℃ per hour. Two hours later, the set temperature will maintain as a
constant and the air circulation is kept at low speed (Cold air proof function takes precedence over all).
11.12.4
Auto:
The Sleep Mode running function operates in accordance with selected running mode by auto mode.
11.12.5
After 7 hours, unit cancels this modes automatically.
11.13. Auto restart function
In case of a sudden power failure, this function automatically sets the unit to previous settings before the
power failure when power returns.
11.14. Turbo function
The indoor fan will work in super high speed, the frequency of compressor will increase, the max run
time is 30 minutes. After 30 minutes, the unit will work in previous setting.
11.15. Plasma
Plasma turns on when the indoor fan runs.
Plasma turns off automatically when front panel is opened.
Plasma is optional function.
39
Service manual
12. Model and Parameters
Model
RACFAN
RAHFAN
RATIFC
RATIFH
SLEEPTIMC
FANCSHIGH
FANHSHIGH
FANCHIGH
FANHHIGH
FANMID
FANLOW
FANSLOW
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
I1COOL
I2COOL
I3COOL
I1HEAT
I2HEAT
I3HEAT
TCDI
TCDE1
TCDE2
TEL2
TEH2
ANGLSTART
ANGLOFF
ANGLHEATMAX
ANGLHEAT
ANGLHEATMIN
ANGLSMALL
ANGLCOOLMAX
ANGLCOOL
ANGLCOOLMIN
PDELAYCOUNT
V1
V2
40
MSH-18HRDN1
1180
1180
59
57
7
1180
1180
1180
1180
1100
980
900
42
47
52
55
58
64
70
76
82
88
12
14.5
18
12.5
15
19
-6
20
12
26
53
190
115
13
20
48
115
186
175
160
127
F6
F3
MSC-18HRDN1
1140
1140
59
57
7
1180
1180
1140
1140
1060
980
900
42
47
52
55
58
64
70
76
82
88
12
14.5
18
12.5
15
19
-6
20
12
24
53
0
141
11
34
51
77
85
68
56
127
F6
F3
Service manual
Model
MSE-09HRDN1
MSE-12HRDN1
flag0
MacType
RatiFC
RatiFH
SleepTim
FanCSHigh
FanHSHigh
FanCHigh
FanHHigh
FanMid
FanLow
FanSlow
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
I1Cool
I2Cool
I3Cool
I1Heat
I2Heat
I3Heat
TCDI
TCDE1
RACFAN
RAHFAN
TEL1
TEH2
ANGLSTART
00
05
66
76
7
1300
1300
1250
1250
1100
880
800
34
38
44
59
63
66
73
76
95
105
7.0
8.0
10.5
8.5
10.0
12.0
-9
20
1250
1250
24
53
200
00
05
82
92
7
1250
1250
1180
1180
1100
850
750
33
47
57
62
72
82
88
92
103
107
8.5
10.0
12
10.5
12.0
13.5
-9
20
1180
1180
24
53
193
ANGLOFF
ANGLHEATMAX
110
18
101
11
ANGLHEAT
27
17
ANGLHEATMIN
53
51
TEL2
33
33
ANGLCOOLMAX
186
180
ANGLCOOL
183
176
ANGLCOOLMIN
160
155
8
8
PDELAYCOUNT
127
127
TEL5
36
36
TEL6
40
40
TCDE2
PARASUM
41
Service manual
13.
Troubleshooting
13.1 Indoor Unit Error Display
Display
LED STATUS
E0
EEPROM error
E1
Indoor / outdoor units communication protection
E2
Zero-crossing examination error
E3
Fan speed beyond control
E5
Open or short circuit of outdoor temperature sensor
E6
Room temperature or evaporator temperature sensor open or short circuit of
P0
Module protection
P1
Over voltage or too low voltage protection
P2
Compressor top protection against temperature
P3
Outdoor low temp. protection
P4
Inverter compressor drive error
Note: E4:
Reserved function
13.1.1
Display
LED STATUS
E0
EEPROM parameter error
Circuit or software error on indoor control board
Replace the control board of indoor
13.1.2 circuit or software error on indoor cortrol board
42
Display
LED STATUS
E1
Indoor / outdoor units communication protection
Service manual
Disconnect the power supply, after 1 minutes, connect the power supply , turn on the
unit using remote controller, does the unit work normally ?
NO
Is the connection on outdoor control board and
between indoor and outdoor unit good? Does the L、
Does the led on outdoor control board bright?
N connect good? Does the S wire connect reliably?
YES
YES
NO
Is the voltage on terminal CZ1 and CZ2 of the outdoor main PCB is 5V?
No
Is the voltage between P and
Replace the module board.(The
Yes
power supply of PCB is supplied
N on inverter module 380V?
by the module board.)
No
NO
Replace the outdoor power
supply board.
Replace the outdoor main
PCB
13.1.3
Display
E2
LED STATUS
Zero-crossing examination error
Is power supply right?
Yes
Is connector connection good?
Yes
Indoor PCB is defective
Replace the indoor control board.
13.1.4
Display
E3
43
LED STATUS
Fan speed beyond control
Service manual
Is connector connection good?
No
Yes
Is voltage being applied to the fan motor?
(rang 90v-160v between mid pin and N on CN1
Repair the connector.
No
Yes
Indoor fan motor is defective
Indoor PCB is defective
Replace indoor fan motor.
Replace indoor main PCB.
13.1.5
Display
E5
LED STATUS
Open or short circuit of outdoor temperature sensor
Is connection to connector good?
Yes
No
Replace the sensor
Repair connector
If display E5 all the same, replace indoor main PCB.
13.1.6
Display
E6
LED STATUS
Room temperature or evaporator temperature sensor open or short circuit
Is connection to connector good?
yes
No
Replace the sensor
Repair connector
If display E6 all the same, replace outdoor main PCB.
13.1.7
Display
P0
44
LED STATUS
Module protection
Service manual
Is connection to connector good?
No
Yes
Repair connector
Is the wires to compressor right?
Yes
Check the voltage between P and N on inverter
No
module. Is it about 380V?
Test the outdoor power supply board again.
Yes
Check the inverter module, If some component
Yes
cracked or damaged?
No
Inverter module damaged, replace it.
Is it breakdown between P-N,P-U,P-V;N-W,N-U,N-V
No
At inverter module
No
Check compressor
Yes
Inverter module is defective
13.1.8
Display
P1
LED STATUS
Over voltage or too low voltage protection
Is the power supply right?
Yes
Check the outdoor power board
Replace outdoor main PCB.
13.1.9
Display
P2
Off: 115゜C;
45
On: 100゜C
LED STATUS
Compressor top protection against temperature
Service manual
Does compressor operate?
Yes
No
Is the connection good?
No
Is refrigerant circulation volume normal?
No
Yes
Connect and test again.
Is protector normal?
Gas charging
No
Yes
Replace protector
Is abnormality the same after gas charging
No
Check the outdoor main PCB
Check refrigerant system (such as clogging of
ill
t )
Replace the outdoor main PCB.
13.1.10
Display
P3
LED STATUS
Outdoor low temp. protection
This is optional, factory standard unit has not this function.
Unit stops when outdoor temp. is low than -15°C and lasting time more than 60 minutes, and unit
runs again when outdoor temp. more than -12°C.
Is the outdoor temp. low than -15°C?
No
Is the outdoor temp sensor right according to the table in clause 12
Yes
Replace the outdoor main board
46
Service manual
13.2 Diagnostic chart
After energizing, no indicator is lighted and the air conditioner can’t be operated.
47
Service manual
13.3 Resetting phenomenon often occurs during operation
(That is automatically entering to the status when power is on.)
The reason is that the instantaneous voltage of main chip is less than 4.5V. Check according to the
following procedure:
13.4 Operation lamp flashes and Timer lamp off
Is connector connection good?
No
Repair the connector.
Is voltage being applied to the fan motor?
Yes
No
Indoor PCB is defective.
Fan motor is defective
13.5 Operation lamp flashes and Timer lamp on
48
Service manual
13.6 Operation lamp off and Timer lamp flashes
13.7 Operation lamp on and Timer lamp flashes
EEROM error, indoor PCB is defective.
13.8 Operation lamp flashes, Timer lamp flashes
This is alarm signal when the main chip can’t detect over-zero signal. When such failure occurs, the
main control board must have fault.
49
Service manual
14
Characteristic of temperature sensor
Temp.℃
-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
50
Resistance KΩ
62.2756
58.7079
56.3694
52.2438
49.3161
46.5725
44
41.5878
39.8239
37.1988
35.2024
33.3269
31.5635
29.9058
28.3459
26.8778
25.4954
24.1932
22.5662
21.8094
20.7184
19.6891
18.7177
17.8005
16.9341
16.1156
15.3418
Temp.℃
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
Resistance KΩ
14.6181
13.918
13.2631
12.6431
12.0561
11.5
10.9731
10.4736
10
9.5507
9.1245
8.7198
8.3357
7.9708
7.6241
7.2946
6.9814
6.6835
6.4002
6.1306
5.8736
5.6296
5.3969
5.1752
4.9639
4.7625
4.5705
Temp.℃
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
Resistance KΩ
4.3874
4.2126
4.0459
3.8867
3.7348
3.5896
3.451
3.3185
3.1918
3.0707
2.959
2.8442
2.7382
2.6368
2.5397
2.4468
2.3577
2.2725
2.1907
2.1124
2.0373
1.9653
1.8963
1.830
1.7665
1.7055
1.6469