LG AB-H1208VA0 User manual

LG Large Duct-Type
Air Conditioner
SERVICE MANUAL
MODELS: AB-H1208VA0

AB-H1208VA0
120: 120,000 Btu/h
Development Sequence
H: Heat Pump
A: Basic Type
V: BV Chassis
Chassis Name
Cooling Capacity
A: Changwon, R-410A
B: Duct
Type of Air Conditioner
Model Type
8: 380-415V, 50Hz, 3Ø
Electric Standard (Volts / Freq. / Phase)
- 2 -
Contents
Model Number Nomenclature
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

- 3 -
General Data
Indoor units
Power supply Ø/V/Hz
Gross cooling capacity kW
Btu/h
Net cooling capacity kW
Btu/h
Heating capacity kW
Btu/h
Current Rated running current A
Fan Motor type
Fan type
Motor output (W) x Number of unit
Air flow rate(H/M/L) CMM
CFM
External static pressure mmAq
Capacitor µF/V(ac)
Drive
Coil Rows x Column x FPI mm
Dimensions(WxHxD) Body mm(inch)
Weight Body kg(lbs)
Air filter
Sound level (H/M/L) dB(A)+3
Piping Liquid mm(inch)
connections Gas mm(inch)
Drain(OD/ID) mm
Dehumidification rate l/h
Safety devices
Temperature sensor
Referigerant
Referigerant control
Connectable outdoor unit
Power supply cable (indoor) No.x mm2
Transmission interunit cable(indoor to outdoor) No.x mm2
Model AB-H1208VA0
[B120AH SV0]
Indoor unit type Ducted Type
3 / 380 - 415 / 50
34.3
117,000
32.8
112,000
38.1
130,000
2.05
BLDC
Sirocco fan
1,491 x 1
105/97/90
3,708/3,426/3,179
20
-
Direct drive
3R x 24C x 17
1,600 x 720 x 800(63.0 x 28.3 x 31.5)
130(287)
prefilter
53/51/49
15.88(5/8)
28.58(11/8)
34/28
10
-
Thermistor
R410A
LEV
Single
4 x 1.25
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.
Conversion Formula
kW = Btu/h ×0.0002931
CFM = CMM ×35.3

- 4 -
General Data
Outdoor units
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
Conversion Formula
kW = Btu/h ×0.0002931
CFM = CMM ×35.3
Dimensions W x H x D mm(inch)
Net weight kg(lbs)
Max. number of connectable indoor units
Type
Qty x model
Compressor
(Constant) Motor type
Oil charge volume cc
Oil type
Charge(at 7.5m) g(oz)
Refrigerant Type
Control
Heat Exchanger Rows x Column x FPI
Defrosting method
Capacitor µF/V(ac)
Fan Drive
Discharge direction Side / Top
Air flow rate x No. of fan CMM(CFM)
Sound level Sound pressure at 1m dB(A)+3
Piping connections Liquid(Ø) mm(inch)
Gas(Ø) mm(inch)
Max. piping length Indoor unit~Outdoor unit m
Max. elevation Indoor unit~Outdoor unit m
1,280 x 1,520 x 730(50.4 x 59.8 x 28.7)
300(661)
1
Scroll
1 x AR073YAB
1 x AR081YAB
PSC
2,325 x 2
FVC68D(PVE)
8,000(282.2)
R410A
LEV
2R x 88C x 17
Reversing cycle
10/450
Direct drive
Top discharge
180(6,400)
65
15.88(5/8)
28.58(11/8)
50
30
Running current Cooling A
Heating A
Starting current Cooling A
Heating A
Power supply Ø / V / Hz
Power supply cable (outdoor) No. x mm
2
Transmission interunit cable (outdoor to indoor) No. x mm
2
24
21
-
-
3 / 380 - 415 / 50
5 x 8.5
2 x 1.25
Rated capacity Gross cooling kW
Btu/h
Net cooling kW
Btu/h
Heating kW
Btu/h
Rated input Cooling kW
Heating kW
Energy label
34.3
117,000
32.8
112,000
38.1
130,000
14.5
12.5
-
AB-H1208VA0
[B120AH SV0]
Outdoor unit

- 5 -
Dimensions
Model No.: AB-H1208VA0[B120 SV0]
1700
1600
798
837
398
544
662 712
1392.4
509
45
33 160
60
15
190 900(bolt hole)
1280
190
700(bolt hole)
730
690
670
1555
63 1444 48
100
Air
inlet
Air
inlet
Air outlet
Service Panel
Knockout hole
Knockout hole
(For the control wiring, the power supply,
refrigerant connecting pipe)
(For the control wiring,
the power supply,
refrigerant connecting
pipe)
1. Indoor Unit
2. Outdoor Unit

- 6 -
Wiring Diagram
NOISE FILTER
R2
S2
R1
S1
T2
N2
T1
N1
To Outdoor Unit
FUSE
(600V,15A)
INDOOR
MOTOR
BLDC DRIVER
CN_TCN_R CN_S CN_N CN_START
CN_SENSER
CN_COMM
CN_PWR
CN_U
CN_V
CN_W
CN_
REACTOR1 REACTOR2
CN_
REACTOR
YL
CN_REMO
EVA OUT
THERMISTOR
CN_PIPE1
CN_BLDC
CN_PIPE2
THERMISTOR
EVA IN
BR
CN_ROOM
MAIN
PCB
CN_POWER
THERMISTOR RETURN AIR
RD
FACTORY WIRING
FIELD WIRING
NOTE
YL:YELLOW
WH:WHITE
RD:RED
BK:BLACK
OR:ORANGE
BL:BLUE
BR:BROWN 3854A21016A
5(C)3(T)2(S)1(R) 4(N)
CONTROLLER
REMOTE
ALARM
FIRE
BR RD YL
132456
Magnetic Contactor
Magnetic Contactor
MAIN
PCB
3 380~415V 50Hz
Power Supp y
S
R
BK
WH
To Indoor Unit
S
TNR
RD
CTN
Condenser
Thermistor
A1
A1
WH
Compressor (B)
WH
W
V
RD
Crankcase Heater
U
BK
Compressor (A)
BK
RD
W
U
VWH
BK
Crankcase Heater
12
A2
4
6
3
5
RD
BK
WH
CN_COM
CN_POWER
CN_3PHASE
65
A2
2
4
1
3
WH
RD
BK
CN_COMP
3854A20684A
GN/YL
BL : BLUE
YL : YELLOW
BR : BROWN
GN/YL : GREEN/YELLOW
WH : WHITE
BK : BLACK
RD : RED
NOTE
Air
Thermistor
Thermistor 1 Thermistor
Compressor
Discharge Pipe Suction Pipe
Compressor
Thermistor 2
Compressor
Discharge Pipe
CN_TH1 CN_TH3 CN_TH2
Outdoor
Motor 1
Motor 2
Outdoor
High Pressure Switch
SV
Va ve
4WV
SV
BK
BL
BL BK
BK
BL
TB2
BK
BK
Va ve 1
4-Way
Va ve 2
So enoid
BL
BL
Capacitor
BK
Capacitor
TB1
BKBK
BR
YL
So enoid
BR
YL
YL
OR
BL
YL
OR
BL
87
4
6
3
5
BK
BL
OR
BR
BK
BL
OR
BR
Re ay for Outdoor Motor
21
CN_PRESS
BL
BL
CN_4,S
BK
RD
CN_FAN2
CN_FAN1
BK
YL
BL
BL
BK
CN_LE
V1
CN_LE
V2
LEV1 LEV2
M
M
BK BLACK OR ORANGE YL YELLOW
BR BROWN RD RED WH WHITE
BL BLUE GN/YL GREEN/YELLOW COMP COMPRESSOR
FACTORY WIRING OPTIONAL WIRING FIELD WIRING
Notes:
1. Indoor Unit
2. Outdoor Unit

1-1. General Information
- 7 -
Troubleshooting Guide
DC Link Volt.
Voltage Input
(R,S,T,N) Current
Detector PWM
ENABLE SMPS Magnet On/Off Output Error Indicator
Communication
Parts
On_board
Rewrite
EEPROM
DC Link Volt Detector
Communication
LED
IPM
U,V,W Output
Hall Sensor
Input

- 8 -
Troubleshooting Guide
Input Current
Detection
3•’ Input
EMC
(Noise Filter)
IPM ( Motor Drive IC)
Hall sensor Input AC->DC
converter DC Link
Detection
SMPS
Input Voltage Detection

- 9 -
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
Error Code
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
Contents Indoor Status Case of error
❈Outdoor Error
Error Code
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
Contents Indoor Status Case of error

- 10 -
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)
Error Code
10 Fan Lock 1time Fan malfunction, Locking Status
21 IPM Fault (Over current) 2time 1time Fan malfunction, Over Current Off
22 CT 2(Max. Current) 2time 2time Current is 6AÆOff
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 2time Communication Poorly Off
60 EEPROM Check Sum Error 6time Check sum mismatching Off
Contents Outdoor
Status
LED01G
(Red)
LED02G
(Green)
Case of error
2 Times
1 Sec.
1 Time
2 Sec.
LED01G
(RED)
LED02G
(GREEN)
2 Times
1 Sec.
1 Time
2 Sec.
2 Times
1 Sec.
1 Time