LG Multi Air Conditioner SVC MANUAL (Exploded View)
MODEL: A4UW363FA2[LMU369HV]
CAUTION: Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.
1. Specification
Outdoor Unit
| Outdoor Unit | A4UW363FA2(LMU369HV) |
| Capacity(*) | 34,000 Btu/h Class |
| Power Input Cooling (Min.~Rated~ Max.) | 0.77~2.72~3.92 kW |
| Power Input Heating | 1.12~3.58~4.1 kW |
| Running Current Cooling | 3.3~11.8~17.0 A |
| Running Current Heating | 4.9~15.5~17.8 A |
| Starting Current Cooling/Heating | A |
| Power Supply | 1/208 - 230/60 Ø/V/Hz |
| Power Supply Cable (Outdoor) | 3 x 12 No.x AWG |
| Transmission Cable (Outdoor to Indoor unit ) | 4 x 18 (Including Earth) No.x AWG |
| Dimensions W x H x D | 900 x 1,165 x 370 mm(inch) (35 7/16 x 45 7/8 x 14 9/16) |
| Net Weight | 95(209.4) kg(lbs) |
| Max. Number of Connectable Indoor Units | 4 |
| Compressor Type | Twin-Rotary |
| Compressor Qty x Model | GPT425DBA |
| Compressor Motor type | BLDC |
| Compressor Oil charge volume | 1300 cc |
| Compressor Oil Type | FVC68D |
| Refrigerant Cycle A Charge (at 7.5m) | 3,500(123.46) g(oz) |
| Refrigerant Cycle B Charge (at 7.5m) | - g(oz) |
| Refrigerant Type | R410A |
| Refrigerant Control | EEV |
| Heat Exchanger (Rows x Column x FPI) x No. | (2R x 26C x 17) x 2 |
| Heat Exchanger Coil tube dia. | 7(0.276) mm(inch) |
| Defrosting Method | Reversing cycle |
| Fan motor Capacitor | Direct (DC) µF/Vac |
| Fan motor Drive | Side |
| Discharge Direction(Side/Top) | 60(2,118) x 2EA CMM(CFM) |
| Air Flow Rate x No. of Fan | 57 dB(A)+3 |
| Sound Level(H) Sound Pressure | 6.35(1/4) × 4EA mm(inch) |
| Piping Connections Liquid(Cycle A) | 9.52(3/8) × 4EA mm(inch) |
| Piping Connections Gas(Cycle A) | - mm(inch) |
| Piping Connections Liquid(Cycle B) | - mm(inch) |
| Piping Connections Gas(Cycle B) | 75(246.1) m(ft.) |
| Piping length spec. Max. total piping | 25(82.0) m(ft.) |
| Piping length spec. Max. OD~ID piping | 30(123.0) m(ft.) |
| Piping length spec. Piping length(no add'l refrigerant) | 15(49.2) m(ft.) |
| Max. Elevation Difference Outdoor Unit~Indoor Unit | 7.5(24.6) m(ft.) |
| Max. Elevation Difference Indoor Unit~Indoor Unit | -10 ~ 46 (14~114.8) °C(°F) |
| Operation Range Cooling (Outdoor) | -15 ~ 24 (5~75.2) °C(°F) |
| Operation Range Heating (Outdoor) |
Notes:
- 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. Wiring cable size must comply with the applicable local and national code.
- 3. The specification may be subject to change without prior notice for purpose of improvement.
Conversion Formula:
kW = Btu/h x 0.0002931
cfm = CMM x 35.3
2. Function Table
| Category | Function | A4UW363FA2 [LMU369HV] |
| Reliability | Defrost / Deicing | ✔️ |
| High Pressure Switch | ❌ | |
| Low Pressure Switch | ❌ | |
| Phase protection | ❌ | |
| Restart Delay (3-minutes) | ✔️ | |
| Self Diagnosis | ✔️ | |
| Reliability | Soft Start | ✔️ |
| Reliability | Test Function | ❌ |
| Convenience | Auto operation(Artificial intelligence) | ✔️ |
| Auto Restart Operation | ✔️ | |
| Central control(LGAP) | ✔️ | |
| CAC Network Function | PDI(Power Distribution Indicator) | PQNUD1S00 |
| PI485 | PMNFP14A0 | |
| Special function kit | Low ambient operation | ✔️ |
| Others | Thermistor | - |
Note:
- ✔️: Applied, ❌: Not applied, - : No relation
- Option: Model name & price are different according to options, and assembled in factory with main unit.
- Accessory: Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.
3. Piping Diagrams
This section describes the piping diagram for the outdoor unit, illustrating the refrigerant flow and component connections.
Diagram Description: The diagram shows the outdoor unit connected to multiple indoor units via gas and liquid piping. Key components include the Accumulator, Reversing Valve, Oil Separator, Heat Exchanger, Compressor, and Electronic Expansion Valves (EEV) for each room.
Refrigerant Flow: COOLING HEATING
Component Locations and PCB Connectors:
| LOC. | Description | PCB Connector |
|---|---|---|
| Th1 | Thermistor for outdoor air temperature | CN_TH2 |
| Th2 | Thermistor for condensing temperature | CN_TH2 |
| Th3 | Thermistor for discharge pipe temperature | CN_TH3 |
| Th4 | Thermistor for suction pipe temperature | CN_TH3 |
| S/V | Solenoid Valve for Hot Gas/Oil Separator | CN_H/GAS /CN_OIL/S |
| L/P | Low Pressure Switch | CN_PRESS |
4. Wiring Diagrams
This section presents the outdoor unit wiring diagram and an image of the main PCB with labeled connectors.
Outdoor Wiring Diagram: The diagram illustrates the connections for the PFC Reactor, Inverter, Compressor, Fan Motor, 4-Way Valve, Oil Separator, and power supply, linking them to the main PCB.
Main PCB Connectors:
- CN_PFC_OUT
- CN_PFC_IN
- CN_4WAY
- CN_OIL/S
- CN_H/GAS
- CN_MOTOR2
- CN_MOTOR1
- CN_COM
- CN_TH3
- CN_TH2
- CN_EEV4
- CN_EEV3
- CN_EEV1
- CN_EEV2
- CN_CENTRAL
- CN_CP(L), CN_CP(N)
- CN_GND1, CN_GND2
- CN_OUT
- CN_COMM
- CN_PWR
- PI485
Color Codes: BK: BLACK, BL: BLUE, BR: BROWN, OR: ORANGE, RD: RED, WH: WHITE, GY: GREY, GR/YL: GREEN/YELLOW
5. Exploded View
This section provides an exploded view of the outdoor unit, detailing the assembly of various components with associated part numbers.
Component Listing (with part numbers):
The exploded view shows components such as outer panels, fans, motors, heat exchangers, compressors, PCBs, and various internal parts, each identified by a numerical code (e.g., 435512, 559010, 237202, 437211, 435301, 546810, 649950, W6640B, 349600, 268711, W6640A, 263230E, 263230D, W66400, 437212, 561410A, 447910, 552116, 546810, 552204, 552202, 561410B, W4986B, 552117, 554031A, W4986A, 137213, 430411, 435511, W6631, 550140, 554160, 552114, W4810, 152503, 552203B, 552203A, 2000, 10, 552113, 552200, 661400A, 352112, 661400B, 661400C, 554031B, 661400D, W49810).
Note: Please ensure GCSC for replacement parts, as they may change based on the buyer's request. Check correct parts in View RPL (Replacement Part List) on GCSC.
GCSC Website: http://biz.lgservice.com/
