Download LG Large Duct-Type Air Conditioner

LG Large Duct-Type
Air Conditioner
SERVICE MANUAL
MODELS: AB-H1208VA0
Contents
Model Number Nomenclature...............................................................................................2
General Data ..........................................................................................................................3
Dimensions ............................................................................................................................5
Wiring Diagram ......................................................................................................................6
Troubleshooting Guide .........................................................................................................7
Features of Controller .........................................................................................................24
Exploded View and Replacement Parts List .....................................................................28
Model Number Nomenclature
AB-H1208VA0
Development Sequence
A: Basic Type
Chassis Name
V: BV Chassis
Electric Standard (Volts / Freq. / Phase)
8: 380-415V, 50Hz, 3Ø
Cooling Capacity
120: 120,000 Btu/h
Model Type
H: Heat Pump
Type of Air Conditioner
A: Changwon, R-410A
B: Duct
-2-
General Data
Indoor units
Indoor unit type
Ducted Type
Model
AB-H1208VA0
[B120AH SV0]
Power supply
Gross cooling capacity
Net cooling capacity
Heating capacity
Current
Fan
Ø/V/Hz
3 / 380 - 415 / 50
kW
34.3
Btu/h
117,000
kW
32.8
Btu/h
112,000
kW
38.1
Btu/h
130,000
A
2.05
Rated running current
Motor type
BLDC
Fan type
Sirocco fan
Motor output (W) x Number of unit
1,491 x 1
Air flow rate(H/M/L)
CMM
105/97/90
CFM
3,708/3,426/3,179
External static pressure
mmAq
20
Capacitor
µF/V(ac)
-
Drive
Coil
Rows x Column x FPI
Dimensions(WxHxD) Body
Weight
Body
Direct drive
mm
3R x 24C x 17
mm(inch)
1,600 x 720 x 800(63.0 x 28.3 x 31.5)
kg(lbs)
130(287)
Air filter
prefilter
Sound level (H/M/L)
dB(A)+3
53/51/49
Piping
Liquid
mm(inch)
15.88(5/8)
connections
Gas
mm(inch)
28.58(11/8)
mm
34/28
l/h
10
Drain(OD/ID)
Dehumidification rate
Safety devices
-
Temperature sensor
Thermistor
Referigerant
R410A
Referigerant control
LEV
Connectable outdoor unit
Single
Power supply cable (indoor)
No.x mm2
4 x 1.25
Transmission interunit cable(indoor to outdoor)
No.x mm2
2 x 1.25
Note :
1. Capacities are based on the following conditions:
Cooling: - Indoor Temperature 27°C(80.6°F) DB /19°C(66.2°F) WB
- Outdoor Temperature 35°C(95°F) DB /24°C(75.2°F) WB
Heating: - Indoor Temperature 20°C(68°F) DB / 15°C(59°F) WB
- Outdoor Temperature 7°C(44.6°F) DB / 6°C(42.8°F) WB
Piping Length - Interconnecting Piping Length 7.5m
- Level Difference of Zero.
2. Gross cooling capacity = Net cooling capacity + Heat of evaporator fan motor.
-3-
Conversion Formula
kW = Btu/h × 0.0002931
CFM = CMM × 35.3
General Data
Outdoor units
AB-H1208VA0
[B120AH SV0]
Outdoor unit
Rated capacity
Gross cooling
Net cooling
Heating
Rated input
Cooling
Heating
kW
Btu/h
kW
Btu/h
kW
Btu/h
kW
kW
34.3
117,000
32.8
112,000
38.1
130,000
14.5
12.5
-
A
A
A
A
Ø / V / Hz
No. x mm2
No. x mm2
24
21
3 / 380 - 415 / 50
5 x 8.5
2 x 1.25
mm(inch)
1,280 x 1,520 x 730(50.4 x 59.8 x 28.7)
kg(lbs)
300(661)
Energy label
Running current
Starting current
Cooling
Heating
Cooling
Heating
Power supply
Power supply cable (outdoor)
Transmission interunit cable (outdoor to indoor)
Dimensions
WxHxD
Net weight
1
Max. number of connectable indoor units
Scroll
Type
1 x AR073YAB
Compressor
(Constant)
Qty x model
1 x AR081YAB
PSC
Motor type
Oil charge volume
2,325 x 2
cc
FVC68D(PVE)
Oil type
Charge(at 7.5m)
Refrigerant
Type
Heat Exchanger
Rows x Column x FPI
8,000(282.2)
g(oz)
R410A
LEV
Control
2R x 88C x 17
Reversing cycle
Defrosting method
µF/V(ac)
10/450
Discharge direction
Side / Top
Top discharge
Air flow rate x No. of fan
CMM(CFM)
180(6,400)
dB(A)+3
65
Capacitor
Fan
Sound level
Piping connections
Direct drive
Drive
Sound pressure at 1m
Liquid(Ø)
mm(inch)
15.88(5/8)
Gas(Ø)
mm(inch)
28.58(11/8)
Max. piping length
Indoor unit~Outdoor unit
m
50
Max. elevation
Indoor unit~Outdoor unit
m
30
Note :
1. Capacities are based on the following conditions:
Cooling: - Indoor Temperature 27°C(80.6°F) DB /19°C(66.2°F) WB
- Outdoor Temperature 35°C(95°F) DB /24°C(75.2°F) WB
Heating: - Indoor Temperature 20°C(68°F) DB / 15°C(59°F) WB
- Outdoor Temperature 7°C(44.6°F) DB / 6°C(42.8°F) WB
Piping Length - Interconnecting Piping Length 7.5m
- Level Difference of Zero.
2. Gross cooling capacity = Net cooling capacity + Heat of evaporator fan motor
-4-
Conversion Formula
kW = Btu/h × 0.0002931
CFM = CMM × 35.3
Dimensions
Model No.: AB-H1208VA0[B120 SV0]
1700
1600
798
837
1. Indoor Unit
1392.4
2. Outdoor Unit
662
712
509
398
544
900(bolt hole)
190
690
Air outlet
48
730
700(bolt hole)
15
1280
190
Air
inlet
1444
1555
Air
inlet
670
Service Panel
33
63
100
160
Knockout hole
(For the control wiring,
the power supply,
refrigerant connecting
pipe)
45
Knockout hole
(For the control wiring, the power supply,
refrigerant connecting pipe)
-5-
60
Wiring Diagram
1. Indoor Unit
REACTOR
BLDC DRIVER
CN_ROOM
MAIN
PCB
CN_U
CN_V
CN_W
RETURN AIR
THERMISTOR
CN_POWER
CN_
REACTOR2
RD
CN_REMO
CN_
REACTOR1
YL
BR
CN_PWR
THERMISO
EVA IN
CN_START
EVA OUT
CN_N
THERMISO
CN_T
CN_PIPE2
CN_S
CN_BLDC
CN_COMM
CN_R
CN_PIPE1
CN_SER
INDOOR
MOTOR
1
2
3
4
5
6
BR
RD
YL
NOISE FILTER
N2
N1
T2
T1
S2
S1
R2
R1
FIRE
ALARM
FUSE
(600V,15A)
REMOTE
CONTROLLER
1(R)
NOTE
FIELD WIRING
FACTORY WIRING
BK:BLACK
RD:RED
BR:BROWN
WH:WHITE
OR:ORANGE YL:YELLOW
BL:BLUE
3854A21016A
2(S)
3(T)
4(N)
5(C)
To Outdoor Unit
Notes:
BK
BR
BL
BLACK
BROWN
BLUE
FACTORY WIRING
OR
RD
GN/YL
ORANGE
RED
GREEN/YELLOW
OPTIONAL WIRING
YL
WH
COMP
2. Outdoor Unit
LEV1
LEV2
M
M
Relay for Outdoor Motor
Magnetic Contactor
CN_3PHASE
CN_COMP
Crankcase Heater
CN_LE
V1
CN_LE
V2
BK
WH
V
RD
W
Compressor (A)
2
1
4
CN_FAN1
U
3
6
5
A1
A2
CN_FAN2
RD
WH
BK
1
2
3
4
5
6
7
8
BL
BL
BK
Capacitor
TB1
BL
BK
Capacitor
OR
BL
BK
BR
YL
OR
BL
BK
BR
YL
Outdoor
Motor 1
OR
BL
BK
BR
YL
OR
BL
BK
BR
YL
Outdoor
Motor 2
BL
BK
BK
Magnetic Contactor
CN_4,S
RD
MAIN
PCB
BK
WH
YL
BL
RD
SV
Solenoid
Valve 2
SV
Solenoid
Valve 1
BK
TB2
BK
BL
BK
BL
BK
BK
Crankcase Heater
BK
WH
V
RD
W
Compressor (B)
2
1
4
3
6
5
A1
A2
BK 4WV
CN_PRESS
U
WH
CN_COM CN_TH1
Condenser
Thermistor
RD
BK
WH
CN_POWER
Air
Thermistor
CN_TH2
Compressor
Discharge Pipe
Thermistor 1
4-Way
Valve
BL
High Pressure Switch
BL
CN_TH3
Compressor
Suction Pipe
Thermistor
Compressor
Discharge Pipe
Thermistor 2
GN/YL
NOTE
R
S
T
N
R
S
T
N
C
BK : BLACK
WH : WHITE
RD : RED
BL : BLUE
BR : BROWN
YL : YELLOW
GN/YL : GREEN/YELLOW
Power Supply
3
380~415V 50Hz
To Indoor Unit
-6-
3854A20684A
YELLOW
WHITE
COMPRESSOR
FIELD WIRING
Troubleshooting Guide
1-1. General Information
DC Link Volt.
DC Link Volt Detector
IPM
EEPROM
On_board
Rewrite
U,V,W Output
Communication
Parts
Hall Sensor
Input
Voltage Input
(R,S,T,N)
Current
Detector
PWM
ENABLE
-7-
SMPS
Magnet
On/Off Output
Error
Indicator
Communication
LED
Troubleshooting Guide
IPM ( Motor Drive IC)
Hall sensor Input
Input Voltage Detection
SMPS
AC->DC
converter
DC Link
Detection
Input Current
Detection
3•’ Input
EMC
(Noise Filter)
-8-
Troubleshooting Guide
1. Error indicator
• The function is to self-diagnosis air conditioner and express the troubles if there is any trouble.
• Error mark is displayed on wired-remote controller and LED of outdoor unit control board.
• If more than two troubles occur simultaneously, lower number of error code is first displayed.
• After error occurs, if error is released, error LED is also released simultaneously.
❈ Indoor Error
Contents
Error Code
Case of error
Indoor Status
1
Air sensor (open/short)
Open / Short
Off
2
Inlet pipe sensor
Open / Short
Off
3
Communication(Indoor ↔ Wired R/Control) Communication Poorly
Off
4
Drain pump/ Float switch
Float switch Open
Off
5
Communication(Indoor ↔ Outdoor)
Communication Poorly
Off
6
Outlet pipe sensor
Open / Short
Off
7
Different mode operation
Different mode operation
Off
9
EEPROM check sum
Check sum mismatching
Off
10
BLDC motor fan lock
Motor not operation
Off
15
Communication(indoor ↔ Fan)
Communication Poorly
Off
❈ Outdoor Error
Contents
Error Code
Case of error
Indoor Status
24
High Pressure Switch operation
High P/S operates 5times for1hour
Off
33
D-Pipe Temp. High
D-Pipe Temp ≥120°C
Off
44
Air Sensor(open/short)
Open/Short
Off
45
Outlet Pipe Sensor(open/short)
Open/Short
Off
47
D-Pipe Sensor(open/short)
Open/Short
Off
48
S-Pipe Sensor(open/short)
Open/Short
Off
51
Excess Capacity
Indoor load excesses 120K
Off
54
Phase error
Continually 5times error
Off
-9-
Troubleshooting Guide
2. Error indicator(Fan Board)
When CH10 or CH15 error occurs, check error indication LED on fan borad.
❈ Fan board Error
Ex) Error 21 (IPM fault)
2 Times
2 Times
2 Times
LED01G
(RED)
1 Sec.
1 Sec.
1 Time
1 Sec.
1 Time
1 Time
LED02G
(GREEN)
2 Sec.
2 Sec.
Contents
Error Code
LED01G
(Red)
LED02G
(Green)
Case of error
Fan malfunction, Locking
Outdoor
Status
10
Fan Lock
1time
21
IPM Fault (Over current)
2time
1time
Fan malfunction, Over Current
Off
22
CT 2(Max. Current)
2time
2time
Current is 6AÆ
Off
23
DC Link Low Volt.
2time
3time
DC Link volt. Is 280V
Off
40
CT Circuit
4time
CT Circuit malfunction (20AÆ )
Off
52
Communication Error
5time
Communication Poorly
Off
60
EEPROM Check Sum Error
6time
Check sum mismatching
Off
2time
- 10 -
Status
Troubleshooting Guide
3. Control Parts
1) Troubleshooting CH10
• When CH10 error occurs , check error indication LED on FAN BOARD.
Fan board
Error LED
10
Title
BLDC Fan Lock
Cause of error
• Mechanical Locking
• Miss connection
21
IPM Fault (Over
current)
• Mechanical Locking
• Miss connection
• Instant over current
• Over Rated current
• Poor insulation of IPM
22
CT 2
(Max.Current)
• Over current (6A°Ë)
23
DC Link Low Volt • DC link volt. is 280Vdc°È.
40
CT Circuit
OPEN/SHORT
60
EEPROM Check
Sum Error
Check point
• The abnormal connection of Hall sensor
• The abnormal connection of U,V,W
• Mechanical Locking of Fan
• Miss connection
- The abnormal connection of Hall sensor
- The abnormal connection of U,V,W
• Instant Overcurrent.
- RMS current 20AÆ
- Peak current 24AÆ
• Poor insulation of Fan
• Overload
- Mechanical Locking of Fan
• Check the overload condition
- Mechanical Locking of Fan
• Check the drop of power source
• Check the power source.
• Check the components.
• Faulty sensor ( CT
Open/short )
• Malfunction of External
power
• Malfunction of current detection circuit.
(Open / Short)
• The voltage of “C01N” Is 4.0Vdc (20A)Æ .
• Check the drop of power source .
• Check sum error
• Check the connection port.
• Check the poor soldering.
2) Troubleshooting CH15
Fan board
Error LED
52
Title
Communication
Error
Cause of error
Check point
• Connector connection error • Connection of wire
• Noise interference
• Faulty PCB
• Connection wire break
- 11 -
Troubleshooting Guide
In general, possible trouble is classified in two causes.
The one is called Starting Failure which is caused from an electrical defect, and the other is Ineffective Air
Conditioning caused by a defect in the refrigeration circuit and improper application.
Unit runs but ineffective cooling
Ineffective Cooling or Heating
Check of cold (warm) air circulation for smooth flow.
Check of outdoor coil
(heat exchanger) & the fan
operation.
Dirty indoor coil
(heat exchanger.)
Check gas leakage.
Check heat load increase in
cooling operation.
Unexpected residue
Added electrical utencil
Malfunction of fan.
Repair gas leak.
Clogging of air filter.
Replacement of unit if the
unit is beyond repair.
Obstruction at air outlet.
Check of inside gas
pressure.
Adjust refrigerant
charge.
Countermeasure against
above trouble.
Malfunction of compressor.
Check clogging in refrigeration circuit.
Repair clogging in refrigeration circuit.
Satisfactory operation with
temperature difference of
inlet & outlet air ;
COOLING : 7~10°C
HEATING : 15~17°C
- 12 -
Replacement of
compressor
Troubleshooting Guide
Fails to Start
Check power source.
Check of circuit breaker
and fuse.
Check control switch
setting.
Check control switch.
Compressor only fails to
start.
Fan only fails to start.
Electric heater is not energized
Improper wiring.
Drop of power voltage.
Loose terminal connection.
Improper wiring
Defect of fan motor
capacitor.
Irregular motor resistance
(Ω)
Irregular motor insulation
(Ω)
Replacement of fan motor.
Improper electric heater
Irregular motor resistance ( Ω )
Regular but fails to start.
Replacement of electric
heater.
Irregular motor insulation ( Ω )
Replacement of compressor.
Replacement of compressor
- 13 -
Troubleshooting Guide
VOLTAGE LIMITS
NAME PLATE RATING
MINIMUM
MAXIMUM
380 - 415 V
342 V
456 V
1. No cooling and heating operation performed
1) Both the blower and the compressor do not work
WHAT TROUBLED
Other parts except the
unit
COMPLAINTS
HOW TO CHECK
REMEDY
• Electric supply interrupted
• Defective power wiring
• Cut off power fuse
Measure power sypply
with a tester in case that
the same power source is
supplied to other equipment except the unit,
what and where troubled
can be discovered by
checking the operation of
other equipment.
Too low voltage
Measure it with a tester.
Check the power source.
Use a thick cable if necessary.
Magnetic switch for compressor & fan motor
Control point is on condition of "OFF" due to trouble.
Make short-circuit, then
measure it with tester.
Replace it if necessary.
Operating switch
Troubled or defective
contactor
Check it with the eyes or
tester.
Repair or replace it.
• Repair a switch box and
relative instrument.
• Replacement of fuse
• Request a power
supplier to repair.
2) Only Indoor blowers do not work
WHAT TROUBLED
Motor
Reactor
Electric wiring
COMPLAINTS
HOW TO CHECK
REMEDY
• Over heated
• Wiring short
Check it with tester
Repair or replace it.
Defected
Check it with a tester.
Replace it.
• Cut- OFF of wiring
• Short circuited on
operation
Check it with a tester.
Rewiring or Repair.
- 14 -
Troubleshooting Guide
3) Only outdoor fan does not work
WHAT TROUBLED
COMPLAINTS
HOW TO CHECK
REMEDY
Motor
• Over-heated
• Wire short
Check how it is insulated.
Repair or replace it.
Electric Wiring
Cut off of wiring
Check it with a tester.
Rewiring or repair.
Short circuited on
operation
4) Only compressor does not work
WHAT TROUBLED
COMPLAINTS
HOW TO CHECK
REMEDY
Magnetic switch for
compressor motor
Defective contact,
magnetic coil troubled.
Check it with the eyes on
with a tester.
Repair or replace it.
Compressor motor
Troubled over-heated
(layer short)
Check how it is insulated.
Replace or repair the
compressor.
High pressure switch
(Option part)
Troubled or defective
contact or operating
Check it with a tester.
Replace it if necessary.
Electric circuit
Defective connection or
disconnection of the circuit
for compressor.
Check it with a tester.
Rewiring or push reset
button.
- 15 -
Troubleshooting Guide
2. The Units discontinue after the operation started
WHAT TROUBLED
COMPLAINTS
HOW TO CHECK
REMEDY
Outdoor coil
Coil is dirty *1
Checking
Wash it by means of
something like chemical
washing.
In-condensable gas
blended.
Air intruded into the
refrigerant pipe line *1
In the event that
difference between the
saturating temperature
corresponding to high
pressure and the
temperature of air
discharged from the
outdoor coil is more than
15°C, incondensable gas
may be blended.
Extract air by vacuum
pump, then replenish
(charge) the refrigerant.
High pressure switch
(Option part)
Improper adjustment
Check it with a pressure
gauge.
Read just it to normal
operating pressure.
(Note)
Don't alternate the
specified adjusting
pressure. If the adjusted
pressure exceed the
specified range, it will
cause a great accident.
Outdoor Fan
Reverse rotation of fan
Obstacle
Confirm the wind blowing
out upward.
Air short circuit *1
Check it with eyes.
If reversed, connect
interchanged wires to
each terminal.
Power wirings.
Note: Use an appropriate measuring instrument for readjustment.
*1: High-pressure switch moves.
- 16 -
Troubleshooting Guide
3. The unit is working, but not cooling and heating sufficiently
(Both blower and compressor are working)
WHAT TROUBLED
COMPLAINTS
HOW TO CHECK
REMEDY
Load
Much Cooling or Heating
load
Heat load increased.
Window or door has many
cracks or gaps.
Do necessary disposal
respectively.
Air flow
Obstacle disturbs Intake
of uniform airflow.
Checking
Correct it.
Short air volume
Reverse rotation of
blower.
Checking
Correct it.
Refrigerant
Shortage in the charged
refrigerant.
Coil inlet pipe is frosted
Recharge it.
(Repair the leakage spot).
Air passage
Improper or foreign bodies
Checking
Correct or clear the
foreign bodies.
Air filter
Clogged with dust
Checking
Cleaning
4. All the functions are performed as specified, but very noisy and vibrant
WHAT TROUBLED
Compressor
Blower
COMPLAINTS
HOW TO CHECK
REMEDY
Liquid refrigerant flooding
back from the evaporator.
• Check for refrigerant over-charge.
• Check to see if the intake air temperature is
extremely cold.
• Check for insufficient air flow quantity.
Faulty Discharge valve
and suction valve.
• Checking
• Replace the
compressor
Fan broken.
Checking
Repair or replace it.
Clear the foreign bodies.
Foreign matters intruded.
Screws
Looseness or fail-off of
screws
Checking
Correct
Electric troubles
(Magnetic contactor)
Defective contact.
Defective contact point.
Rusting and foreign matters in the iron core contact face. Defective contact of the
operating switch.
Checking
Repair and clean or
replace it.
Others
Improper installation
Checking
Correct it.
- 17 -
Electronic parts Troubleshooting Guide
Possible trouble 1
Is the input voltage of
transformer AC220V?
: The unit does not operate.
NO
1. Check the Fuse.
2. Check the wiring of AC220V.
NO
1. Exchange the transformer.
2. Check the connector of
transformer.
YES
Is the output voltage of
transformer AC24V & AC13V?
YES
Is the output voltage
of IC02D(7805) on the
main PCB DC5V?
NO
1. Exchange IC02D(7805) on
the main PCB.
2. Check the D01D~D05D, R05C
on the main PCB.
YES
Is the output voltage
of IC01D(7812 ) on the
main PCB DC12V?
NO
1. Exchange IC01D(7812) on
the main PCB.
2. Check the D01D~D05D,
R05C on the main PCB.
YES
Is the output voltage
of IC01A(7036) on the
main PCB DC5V?
NO
1. Exchange IC01A(7036) on
the main PCB.
YES
OSC vibration?
NO
1. Exchange OSC.
2. Check the pattern around
OSC on the main PCB.
YES
1. Exchange main PCB ASS'Y
Possible trouble 2
Is the power ON?
: The remote-controller does not operate.
NO
1. Exchange or exchange FUSE.
2. Check the input voltage of
Main PCB ASS'Y.
YES
Is the input voltage
of remote-controller
DC12V?
NO
1. Check or exchange the IC01D
on the Main PCB.
2. Check or exchange the
Connector (RED, BROWN)
of the remote controller.
YES
1. Exchange remote-controller
2. Check or exchange the Main
PCB ASS'Y.
- 18 -
Electronic parts Troubleshooting Guide
Possible trouble 3
Is the connection between
MAIN PCB and remote-controller
correct?
: Key input of remote-controller does not respond.
1. Check or repair Connector wiring.
2. Exchange the Connector.
NO
YES
Is any key on the remote-controller
keeping pressed?
1. Replace the pressed key.
2. Exchange the Knob or Key.
YES
NO
Is there Check(F**) on
the remote controller LCD?
YES
1. Remove cause of Check.
2. Reenergize the power supply.
NO
Is the input power voltage of
remote-controller DC12V?
NO
1. Check or exchange IC01D
(7812) on the MAIN PCB.
YES
Is there OSC vibration on
the remote-controller PCB?
NO
1. Exchange OSC
2. Check the pattern around OSC
on the remote-controller PCB.
YES
Do Keys have troubles?
YES
1. Check Keys.
2. Repair or exchange Key.
NO
Exchange remote-controller.
Possible trouble 4
Are there trouble in
LCD parts?
: LCD display on the remote-controller shows some trouble.
YES
1. Check crack, damage of LCD.
2. Check LCD pattern.
NO
Is there trouble in the
remote-controller PCB
ASS'Y?
YES
1. Check or repair all IC with
dust or moisture on the PCB.
2. Exchange remote-controller
PCB.
NO
Exchange remote-controller.
- 19 -
Electronic parts Troubleshooting Guide
Possible trouble 5
Is the unit operating?
: No cooling operation performed.
NO
1. Press power ON/OFF button.
YES
Is the cooling mode?
NO
1. Press cooling operation key.
2. After reenergizing power supply,
press power "ON/OFF" button.
NO
1. Set flowing.
'Set Temp. < Room Temp.'
YES
Set Temp. < Room Temp.?
YES
Is the output
voltage of Micom's 4PIN on the
MAIN PCB DC0V?
NO
1. Check or exchange IC02D.
2. Check 3-minutes time delay.
YES
Is the voltage
between 1PIN of CN-COMP and
NEUTRAL 220V?
NO
1. Check or exchange RY4.
YES
Is the magnetic contactor
for compressor OK?
NO
1. Check the wiring of Magnetic
contactor.
2. Exchange Magnetic contactor.
YES
1. Check Compressor and
Capacitor for Compressor.
NOTE: 3ø model has not capacitor for compressor.
- 20 -
Electronic parts Troubleshooting Guide
Possible trouble 6
Is the heater operation?
: No heater operation performed.
NO
1. Select heater operation mode.
YES
Is the heater LCD "ON"?
NO
1. Reconnetting power supply.
press Heater Key.
NO
1. Set following.
'Set temp. > Room temp.'
NO
1. Check or exchange IC01D,
IC02D on the MAIN PCB.
YES
Set temp. > Room temp.?
YES
Is the output
voltage of Micom's 13PIN on the
MAIN PCB 5V?
YES
Is the voltage
between 1PIN of CN6 and
NEUTRAL 220V?
NO
1. Check or exchange RY13.
YES
Is the magnetic contactor for
heater OK?
NO
1. Check the wiring of Magnetic
contactor.
2. Exchange Magnetic contactor.
YES
Check or exchange E/Heater.
- 21 -
Electronic parts Troubleshooting Guide
Possible trouble 7
Is the indoor fan operation?
: No humidifier operation performed.
1. Press cooling or fan operation
or heater operation key.
NO
YES
Is the HUMID LCD "ON"?
NO
1. Press humidifier Key.
YES
Is the output
voltage of Micom's 3PIN on
the MAIN PCB 5V?
1. Check or exchange IC02D
on the MAIN PCB.
NO
YES
Is the voltage
between 1PIN of CN5 and
NEUTRAL 220V?
NO
1. Check or exchange RY3.
YES
Is the magnetic
contactor for humidifier OK?
NO
1. Check the wiring or Magnetic
contactor.
2. Exchange Magnetic contactor.
YES
Check the humidifier.
- 22 -
Electronic parts Troubleshooting Guide
Possible trouble 8
Is the unit operating?
: Indoor motor does not operate.
NO
1. Press power ON/OFF button.
2. Reconnect the power supply.
YES
Is the output
voltage of Micom's 10PIN on
the MAIN PCB 5V?
NO
1. Check or exchange IC01D,
IC02D on the main PCB.
YES
Is the voltage
between 1PIN of CN8 and
NEUTRAL 220V?
NO
1. Check or exchange RY10.
YES
Is the "Power relay" for
indoor motor OK?
NO
1. Check the wiring of
"Power relay".
2. Exchange "Power relay".
YES
Check the indoor motor.
Possible trouble 9
Is it cooling operation?
: Outdoor motor does not operate.
NO
1. Press power "ON/OFF" button.
2. Select cooling operation.
YES
Is the compressor operating?
NO
1. Set following.
Set temp. < Room temp.
2. Wait, if the unit has operating
with 3-minute time delay.
YES
1. Check wiring for outdoor
motor and magnetic contactor.
2. Check outdoor motor & capacitor.
- 23 -
Features of Controller
1. Circuit Diagram of Indoor PCB
- 24 -
2. Circuit Diagram of BLDC Driver
- 25 -
3. Circuit Diagram of Outdoor PCB
- 26 -
4. Error Mode & Corrective Method
Error mode
Cause of error
CH01
OPEN/SHORT of
Room Temp .sensor
CH02
OPEN/SHORT of
Indoor Pipe sensor
CH03
Communication
Error between
indoor PCB and
Remote controller
CH05
Communication
Error between
indoor PCB & outdoor PCB
CH24
High Pressure
Switch Trip
Sensing condition of error
CH33
CH44
CH45
CH47
CH48
CH54
- 27 -
Method of SVC
Remark
Exploded View and Replacement Parts List
1. Indoor Unit
• Exploded View (AB-H1208VA0)
342800
349600
336610
344170-2
344170-1
359012
354210
349610
152302
268714-1
268714-2
WOFZZ
658740
330870
566001-1
W6200
249951
263230-4
267110
263230-5
263230-6
- 28 -
Exploded View and Replacement Parts List
• Replacement Parts List
AB-H1208VA0
LOCATION
No.
PART No.
DESCRIPTION
AB-H1208VA0
336610
344170-1
344170-2
349610
359012
349600
342800
330870
354210
152302
267110
249951
268714-1
268714-2
658740
566001-1
WOFZZ
W6200
263230-4
263230-5
HOUSING ASSEMBLY
ROTOR ASSEMBLY
STATOR ASSEMBLY
MOUNT ASSEMBLY, MOTOR
FAN ASSEMBLY, BLOWER
BRACKET ASSEMBLY
BEARING
DRAIN PAN ASSEMBLY
EVAPORATOR ASSEMBLY
FILTER(MECH)
REMOTE CONTROLLER ASSEMBLY
CONTROL BOX ASSEMBLY, INDOOR
PCB ASSEMBLY
PCB ASSEMBLY
REACTOR
MAGNETIC CONTACTOR
FUSE
FILTER(CIRC),EMC
THERMISTOR ASSEMBLY
THERMISTOR ASSEMBLY
3661A10031A
4413A20001A
4417A20001B
4961A10014A
5835A20003G
4811A10003B
4A00131C
3087A20032A
5421A20217A
5230A30017B
6711A20127B
4995A20526A
6871A00012A
6871A10222A
5874A90003H
6600B000039
0FZZA90001M
6200J000125
6323A30004L
6323AQ3226Y
263230-6
THERMISTOR ASSEMBLY
6323A30002C
- 29 -
REMARK
Main PCB
BLDC Motor
15A , 600V
RETURN AIR SENSOR
PIPE(EVA.OUT)
TEMP. SENSOR
PIPE(EVA. IN)
TEMP. SENSOR
Exploded View and Replacement Parts List
2. Outdoor Unit
• Exploded View (AB-H1208VA0)
435312
559010
549610
546810
554032-2
554032-4
554032-1
554032-3
649950
566001
W0CZZ
668711
W6920
552201-1
548490
561410
552201-2
552116
566000
552204
561411-1
554160-2
561411-2
561411-3
552203-2
552203-1
263230-2
554160-1
263230-1
552200
263230-3
- 30 -
Exploded View and Replacement Parts List
• Replacement Parts List
AB-H1208VA0
LOCATION
No.
559010
435312
546810
549610
649950
668711
566001-2
W6920
W0CZZ
554032-1
554032-2
554032-3
554032-4
554032-1
554032-2
554032-3
554032-4
554160-1
554160-2
548490
552203-1
552203-2
552116
552200
552201-1
552201-2
552204
561410
561411-1
561411-2
561411-3
566000
263230-1
263230-2
263230-3
PART No.
DESCRIPTION
AB-H1208VA0
FAN ASSEMBLY, PROPELLER
GRILLE ASSEMBLY, DISCHARGE
MOTOR ASSEMBLY, OUTDOOR
MOUNT ASSEMBLY, MOTOR
CONTROL BOX ASSEMBLY
PCB ASSEMBLY
SWITCH, MAGNET
RELAY
CAPACITOR
CONDENSER ASSEMBLY
CONDENSER ASSEMBLY
CONDENSER ASSEMBLY
CONDENSER ASSEMBLY
CONDENSER ASSEMBLY
CONDENSER ASSEMBLY
CONDENSER ASSEMBLY
CONDENSER ASSEMBLY
COMPRESSOR
COMPRESSOR
ACCUMULATOR
VALVE, SERVICE
VALVE, SERVICE
TUBE ASSEMBLY, REVERSING
VALVE, EXPANSION BODY
VALVE, CHECK
VALVE, CHECK
VALVE,SOLENOID
COIL ASSEMBLY,REVERSING VALVE
COIL ASSEMBLY,EXPANSION
COIL ASSEMBLY, SOLENOID
COIL ASSEMBLY, SOLENOID
SWITCH, PRESSURE
THERMISTOR
THERMISTOR
THERMISTOR
5901A10029A
3531A20211F
4681A10014H
4960A10022A
4995A10163A
6871A20583W
6600B000041
3A00261C
3A00988G
5403A20160A
5403A20160B
5403A20159A
6711A20127B
5403A20160G
5403A20160H
5403A20159G
5403A20159H
2520UBBY2BA
2520UBDY2AB
4849A10038A
MJX30447401
5220A20035A
5211A12308C
5220A90013A
3A01020H
3A01020L
5220A90002H
6141A20010R
6141A20011W
6141A20031L
6141A20031M
3A02524L
6323A20020P
6323A20020Q
6323A20020R
- 31 -
REMARK
10 µF, 450VAC
PCM
PCM
PCM
PCM
GOLD
GOLD
GOLD
GOLD
AR081YAB
AR073YAB
Ø 28
Ø 15.88
HIGH PRESSURE
CONDENSER, AMBIENT TEMP.
COMP-A DISCHARGE,SUCTION
COMP-B DISCHARGE
P/No.: 3828A20845A
June, 2006
Printed in Korea