LG Air Conditioner Service Manual
(Exploded View)
Models: LUU188HV, LUU189HV, LUU248HV, LUU249HV, LUU368HV, LUU369HV, LUU428HV, LUU429HV, LUU488HV
CAUTION: Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.
Any reproduction, duplication, distribution, modification, copying, or transmission of this Service Manual is STRICTLY PROHIBITED unless prior written consent from LG Electronics is obtained.
1. Specification
LUU188HV / LUU248HV & LUU189HV
| Outdoor unit | LUU188HV / LUU248HV | LUU189HV |
|---|---|---|
| Power Supply | 208/230, 1, 60 | 208/230, 1, 60 |
| Wiring Connections (Power Supply Cable) | 3C x 2.5 (12) | 3C x 2.5 (12) |
| Casing Color | Warm Gray | Warm Gray |
| Dimensions (W x H x D) mm | 950 x 834 x 330 | 950 x 834 x 330 |
| Dimensions (W x H x D) inch | 37-13/32 x 32-27/32 | 37-13/32 x 32-27/32 |
| Net Weight kg (lbs) | 58.5 (129) | 59.6 (131) |
| Compressor | Type: Twin Rotary | Type: Twin Rotary |
| Model: GJT240MAA x 1 | Model: GJT240MAA x 1 | |
| Motor type: BLDC | Motor type: BLDC | |
| Motor Output: 2 137 (at 60Hz) x 1 | Motor Output: 2 137 (at 60Hz) x 1 | |
| Refrigerant | Type: R410A | Type: R410A |
| Precharged Amount: 2 200(4.9) | Precharged Amount: 1 700(3.75) | |
| Chargeless-Pipe Length: 7.5 (24.6) | Chargeless-Pipe Length: 7.5 (24.6) | |
| Additional Charging Volume | 40 (0.43) | 40 (0.43) |
| Control | Electronic Expansion Valve | Electronic Expansion Valve |
| Refrigerant Oil | Type: FVC68D | Type: FVC68D |
| Charged volume: 900 x 1 | Charged volume: 900 x 1 | |
| Heat Exchanger | (Row x Column x Fins per inch) x No.: (2 x 38 x 14) x 1 | (Row x Column x Fins per inch) x No.: (2 x 38 x 14) x 1 |
| Type: Axial | Type: Axial | |
| Fan | Air Flow Rate: 58 x 1 | Air Flow Rate: 58 x 1 |
| Type: BLDC | Type: BLDC | |
| Fan Motor | Output: 124 x 1 | Output: 124 x 1 |
| Type: BLDC | Type: BLDC | |
| Sound Pressure Level | Cooling Rated: 48 dB(A) | Cooling Rated: 48 dB(A) |
| Heating Rated: 52 dB(A) | Heating Rated: 52 dB(A) | |
| Piping Connections | Liquid Outer Dia.: Ø 9.52 (3/8) | Liquid Outer Dia.: Ø 9.52 (3/8) |
| Gas Outer Dia.: Ø 15.88 (5/8) | Gas Outer Dia.: Ø 15.88 (5/8) | |
| Piping Length Max. | 50 (164) | 50 (164) |
| Maximum Height (Outdoor Unit ~ Indoor Unit) Max. | 30 (98) | 30 (98) |
| Operation Range (Outdoor Temperature) | Cooling Min. ~ Max.: -20 (-4) ~ 48 (118) °C DB (°F DB) | Cooling Min. ~ Max.: -20 (-4) ~ 48 (118) °C DB (°F DB) |
| Heating Min. ~ Max.: -20 (-4) ~ 18 (64) °C DB (°F DB) | Heating Min. ~ Max.: -20 (-4) ~ 18 (64) °C DB (°F DB) | |
| Electric Leakage Circuit Breaker | 30 A | 30 A |
Notes:
- 1. Wiring cable size must comply with the applicable local and national code.
- 2. Due to LG's policy of innovation, some specifications may be changed without notification.
- 3. Sound Level Values are measured in an Anechoic chamber. Therefore, these values can be increased owing to ambient conditions during operation.
- 4. Cooling Operation Range: -15(5)~48(118). When applying the Wind Baffle: -20(-4)~
LUU249HV
| Outdoor unit | LUU249HV |
|---|---|
| Power Supply | 208/230, 1, 60 |
| Wiring Connections (Power Supply Cable) | 3C x 2.5 (12) |
| Casing Color | Warm Gray |
| Dimensions (W x H x D) mm | 950 x 834 x 330 |
| Dimensions (W x H x D) inch | 37-13/32 x 32-27/32 |
| Net Weight kg (lbs) | 59 (130) |
| Compressor | Type: Twin Rotary |
| Model: GJT240MAA x 1 | |
| Motor type: BLDC | |
| Motor Output: 2 137 (at 60Hz) x 1 | |
| Refrigerant | Type: R410A |
| Precharged Amount: 2 000 (4.41) | |
| Chargeless-Pipe Length: 7.5 (24.6) | |
| Additional Charging Volume | 40 (0.43) |
| Control | Electronic Expansion Valve |
| Refrigerant Oil | Type: FVC68D |
| Charged volume: 900 x 1 | |
| Heat Exchanger | (Row x Column x Fins per inch) x No.: (2 x 38 x 14) x 1 |
| Type: Axial | |
| Fan | Air Flow Rate: 58 x 1 |
| Type: BLDC | |
| Fan Motor | Output: 124 x 1 |
| Type: BLDC | |
| Sound Pressure Level | Cooling Rated: 48 dB(A) |
| Heating Rated: 52 dB(A) | |
| Piping Connections | Liquid Outer Dia.: Ø 9.52 (3/8) |
| Gas Outer Dia.: Ø 15.88 (5/8) | |
| Piping Length Max. | 50 (164) |
| Maximum Height (Outdoor Unit ~ Indoor Unit) Max. | 30 (98) |
| Operation Range (Outdoor Temperature) | Cooling Min. ~ Max.: -20 (-4) ~ 48 (118) °C DB (°F DB) |
| Heating Min. ~ Max.: -18(-0.4) ~ 18 (64) °C DB (°F DB) | |
| Electric Leakage Circuit Breaker | 30 A |
Notes:
- 1. Wiring cable size must comply with the applicable local and national code.
- 2. Due to LG's policy of innovation, some specifications may be changed without notification.
- 3. Sound Level Values are measured in an Anechoic chamber. Therefore, these values can be increased owing to ambient conditions during operation.
- 4. Cooling Operation Range: -15(5)~48(118). When applying the Wind Baffle: -20(-4)~
LUU368HV / LUU428HV / LUU488HV & LUU369HV / LUU429HV
| Outdoor unit | LUU368HV / LUU428HV / LUU488HV | LUU369HV / LUU429HV |
|---|---|---|
| Power Supply | 208/230, 1, 60 | 208/230, 1, 60 |
| Wiring Connections (Power Supply Cable) | 3C x 6.0 (10) | 3C x 6.0 (10) |
| Casing Color | Warm Gray | Warm Gray |
| Dimensions (W x H x D) mm | 950 x 1380 x 330 | 950 x 1380 x 330 |
| Dimensions (W x H x D) inch | 37-13/32 x 54-11/32 x 13 | 37-13/32 x 54-11/32 x 13 |
| Net Weight kg (lbs) | 92 (203) | 90.2 (199) |
| Compressor | Type: Twin Rotary | Type: Scroll |
| Model: GPT442MBA x 1 | Model: RJA036MAA x 1 | |
| Motor type: BLDC | Motor type: BLDC | |
| Motor Output: 4 241 (at 60 Hz) x 1 | Motor Output: 3 198 (at 60 Hz) x 1 | |
| Refrigerant | Type: R410A | Type: R410A |
| Precharged Amount: 3 400 (7.5) | Precharged Amount: 3 400 (7.5) | |
| Chargeless-Pipe Length: 7.5 (24.6) | Chargeless-Pipe Length: 7.5 (24.6) | |
| Additional Charging Volume | 40 (0.43) | 40 (0.43) |
| Control | Electronic Expansion Valve | Electronic Expansion Valve |
| Refrigerant Oil | Type: FVC68D | Type: FVC68D |
| Charged volume: 1 300 x 1 | Charged volume: 1 000 x 1 | |
| Heat Exchanger | (Row x Column x Fins per inch) x No.: (2 x 32 x 14) x 2 | (Row x Column x Fins per inch) x No.: (2 x 32 x 14) x 2 |
| Type: Axial | Type: Axial | |
| Fan | Air Flow Rate: 120 x 2 | Air Flow Rate: 120 x 2 |
| Type: BLDC | Type: BLDC | |
| Fan Motor | Output: 124 x 2 | Output: 124 x 2 |
| Type: BLDC | Type: BLDC | |
| Sound Pressure Level | Cooling Rated: 52 dB(A) | Cooling Rated: 52 dB(A) |
| Heating Rated: 54 dB(A) | Heating Rated: 54 dB(A) | |
| Piping Connections | Liquid Outer Dia.: Ø 9.52 (3/8) | Liquid Outer Dia.: Ø 9.52 (3/8) |
| Gas Outer Dia.: Ø 15.88 (5/8) | Gas Outer Dia.: Ø 15.88 (5/8) | |
| Piping Length Max. | 75 (246) | 75 (246) |
| Maximum Height (Outdoor Unit ~ Indoor Unit) Max. | 30 (98) | 30 (98) |
| Operation Range (Outdoor Temperature) | Cooling Min. ~ Max.: -20 (-4) ~ 48 (118) °C DB (°F DB) | Cooling Min. ~ Max.: -20 (-4) ~ 48 (118) °C DB (°F DB) |
| Heating Min. ~ Max.: -20 (-4) ~ 18 (64) °C DB (°F DB) | Heating Min. ~ Max.: -20 (-4) ~ 18 (64) °C DB (°F DB) | |
| Electric Leakage Circuit Breaker | 40 A | 40 A |
Notes:
- 1. Wiring cable size must comply with the applicable local and national code.
- 2. Due to LG's policy of innovation, some specifications may be changed without notification.
- 3. Sound Level Values are measured in an Anechoic chamber. Therefore, these values can be increased owing to ambient conditions during operation.
- 4. Cooling Operation Range: -15(5)~48(118). When applying the Wind Baffle: -20(-4)~
2. Function Table
Outdoor Units
| Category | Functions | LUU188HV/LUU189HV/LUU248HV LUU249HV/LUU368HV/LUU369HV LUU428HV/LUU429HV/LUU488HV |
|---|---|---|
| Reliability | Defrost / Deicing | O |
| Base Pan Heater | PQSH1200 | |
| High pressure switch | X | |
| Low pressure switch | X | |
| Phase protection | X | |
| Convenience | Restart delay (3-minutes) | O |
| Self diagnosis | O | |
| Soft start | O | |
| Test function | X | |
| Night Silent Operation | O | |
| Wiring Error Check | X | |
| Peak Control | X | |
| Mode Lock | O | |
| Pump Down | O | |
| Network function | Network solution(LGAP) | O |
Central Controller
| Device | LUU188HV/LUU189HV/LUU248HV LUU249HV/LUU368HV/LUU369HV LUU428HV/LUU429HV/LUU488HV |
|---|---|
| AC Smart IV | PACS4B000 |
| ACP IV | PACP4B000 |
| PI485 | PMNFP14A1 |
Note: O : Applied, X : Not applied
Accessory model name: Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.
3. Piping Diagrams
Models: LUU188HV / LUU189HV / LUU248HV / LUU249HV / LUU368HV / LUU369HV / LUU428HV / LUU429HV / LUU488HV
The piping diagram illustrates the refrigerant flow within the outdoor unit for cooling and heating operations. It depicts key components such as strainers, an electronic expansion valve, a pressure sensor, an accumulator, a 4-way valve, an inverter compressor, and various thermistors (cond-out pipe, cond-mid pipe, suction pipe, discharge pipe, air temperature).
Sensor Information & PCB Connector Mapping
| Sensor Information | PCB Connector |
|---|---|
| Discharge pipe temperature | CN_DISCHA_BK |
| Suction pipe temperature | CN_SUCTION_GR |
| Cond-out pipe temperature | CN_C_PIPE_VI |
| Air temperature | CN_AIR_YL |
| Cond-mid pipe temperature | CN_MID_BR |
| Pressure | CN_H_PRESS_RD |
4. Wiring Diagrams
These sections detail the wiring configurations for the LG Air Conditioner outdoor units, including the main PCB, motor PCB, and inverter PCB for various model series.
Models: LUU188HV / LUU189HV / LUU248HV
Outdoor Wiring Diagram Overview: Shows the overall electrical connections. Key components include the compressor, EEV, pressure sensor, main PCB, and motor PCB.
Main PCB Connectors:
- CN_LGMV_BL
- CN_AIR_YL
- CN_H_PRESS_RD
- CN_MID_BR
- CN_DISCHARGE_BK
- CN_SUCTION_GR
- CN_POWER_WH
- CN_EEV1_WH
- CN_REACTOR_IN_BL
- CN_FLASH_WH
- CN_4WAY_YL
- CN_REACTOR_OUT1_BL
- CN_COM_WH
- CN-CP_N
- CN-CP_L
- CN_CP_L_BL
Motor PCB Connectors:
- CN_MAIN_BL
- CN_FAN_WH
- CN_UVW_RD
- CN_HEATSINK_WH
- CN_REACTOR_OUT2_WH
Models: LUU249HV
Outdoor Wiring Diagram Overview: Similar to the above, detailing connections for the LUU249HV model.
Main PCB Connectors:
- CN_CENTRAL_WH
- CN_DISCHARGE_BK
- CN_EEV1_WH
- CN_C_PIPE_VI
- CN_H_PRESS
- CN_COMP_RD
- CN_FAN_WH
- CN_LGMV_WH
- CN_AIR_YL
- CN_MID_BR
- CN_FLASH_WH
- CN_SUCTION_GR
- CN_EEPROM_WH
- CN_INPUT_BROWN
- CN_INPUT_BLUE
- CN_REACTOR_OUT_RD
- CN_REACTOR_IN_BL
- CN_4WAY_YL
- CN_CP_N
- CN_CP_L
Models: LUU368HV / LUU428HV / LUU488HV & LUU369HV / LUU429HV
Main PCB & Inverter PCB Overview: Diagrams and component layouts for the main and inverter circuit boards.
Main PCB Connectors (Common for LUU368HV/LUU428HV/LUU488HV & LUU369HV/LUU429HV):
- CN_HEATER_BL
- CN_INV
- CEN1_WH_J
- CN_CNVSS
- CEN2_BL_J
- CEN2_MID_BR
- CN_DISCHA_BK
- CN_SUCTION_GR
- CN_AIR_YL
- CN_H_PRESS_RD
- CN_4WAY_YL
- CN_POWER_WH
- CN_COM_SINGLE
- CN_EEV1_WH
- CN_C_PIPE_VI
- CN_MAIN(WH)
- CN_POWER_BL
Inverter PCB Connectors (Common for LUU368HV/LUU428HV/LUU488HV & LUU369HV/LUU429HV):
- AC_L_BROWN
- AC_N_BLUE
- CN_FAN2(BL)
- CN_FAN1(WH)
- CN_COMP(WH)
Motor PCB Detail
Motor PCB Connectors:
- CN-FAN2_BL
- CN_MAIN_BL
- CN_MAIN_WH
- CN_FAN1_WH
- CN_LGMV_WH
5. Exploded View
The exploded views visually break down the outdoor unit components for different model series, showing the assembly of various parts with numerical identifiers.
Models: LUU188HV / LUU189HV / LUU248HV
This section details the exploded view of the outdoor unit for the specified models.
Component Identification:
| Location No. | Description | Sensor Information | Housing Color |
|---|---|---|---|
| EBG13BK | Thermistor S3 (CN_DISCHA_BK) | Discharge pipe temperature | Black |
| EBG13GR | Thermistor S4 (CN_SUCTION_GR) | Suction pipe temperature | Green |
| EBG13VI | Thermistor S5 (CN_C_PIPE_VI) | Cond-out pipe temperature | Violet |
| EBG13YL | Thermistor S6 (CN_AIR_YL) | Air temperature | Yellow |
| EBG13BR | Thermistor S2 (CN_MID_BR) | Cond-mid pipe temperature | Brown |
| 165000 | Pressure sensor S1 (CN_H_PRESS_RD) | Pressure | Red |
Models: LUU249HV
This section details the exploded view of the outdoor unit for the LUU249HV model.
Component Identification:
| Location No. | Description | Sensor Information | Housing Color |
|---|---|---|---|
| EBG13YL | Thermistor S6 (CN_AIR_YL) | Air temperature | Yellow |
| EBG13GR | Thermistor S4 (CN_SUCTION_GR) | Suction pipe temperature | Green |
| EBG13VI | Thermistor S5 (CN_C_PIPE_VI) | Cond-out pipe temperature | Violet |
| EBG13BK | Thermistor S3 (CN_DISCHA_BK) | Discharge pipe temperature | Black |
| EBG13BR | Thermistor S2 (CN_MID_BR) | Cond-mid pipe temperature | Brown |
| 165000 | Pressure sensor S1 (CN_H_PRESS_RD) | Pressure | Red |
Models: LUU368HV / LUU428HV / LUU488HV
This section details the exploded view of the outdoor unit for the specified models.
Component Identification:
| Location No. | Description | Sensor Information | Housing Color |
|---|---|---|---|
| 263230A | Thermistor S6 (CN_AIR_YL) | Air temperature | Yellow |
| 263230B | Thermistor S4 (CN_SUCTION_GR) | Suction pipe temperature | Green |
| 263230C | Thermistor S5 (CN_C_PIPE_VI) | Cond-out pipe temperature | Violet |
| 263230D | Thermistor S3 (CN_DISCHA_BK) | Discharge pipe temperature | Black |
| 263230E | Thermistor S2 (CN_MID_BR) | Cond-mid pipe temperature | Brown |
| 165000 | Pressure sensor S1 (CN_H_PRESS_RD) | Pressure | Red |
Models: LUU369HV / LUU429HV
This section details the exploded view of the outdoor unit for the specified models.
Component Identification:
| Location No. | Description | Sensor Information | Housing Color |
|---|---|---|---|
| 263230A | Thermistor S6 (CN_AIR_YL) | Air temperature | Yellow |
| 263230B | Thermistor S4 (CN_SUCTION_GR) | Suction pipe temperature | Green |
| 263230C | Thermistor S5 (CN_C_PIPE_VI) | Cond-out pipe temperature | Violet |
| 263230D | Thermistor S3 (CN_DISCHA_BK) | Discharge pipe temperature | Black |
| 263230E | Thermistor S2 (CN_MID_BR) | Cond-mid pipe temperature | Brown |
| 165000 | Pressure sensor S1 (CN_H_PRESS_RD) | Pressure | Red |
Condenser Total Assembly Required Parts
Models: LUU188HV / LUU189HV / LUU248HV / LUU249HV
| Description | Location No. | Q'ty |
|---|---|---|
| Condenser Assembly,Bending | 554031 | 1 |
| Tube Assembly,Manifold(Outdoor) | 552115 | 1 |
| Tube Assembly,Condenser(Out) | 552113 | 1 |
Models: LUU368HV / LUU369HV / LUU428HV / LUU429HV / LUU488HV
| Description | Location No. | Q'ty |
|---|---|---|
| Condenser Assembly,Bending | 554031 | 2 |
| Tube Assembly,Manifold(Outdoor) | 552115 | 1 |
| Tube Assembly,Capillary | 552111 | 1 |
