Internal Use nly http://biz.lgservice.com Air Conditioner SVC MANUAL(Exploded View) MDEL : AUUW423D[LUU425HV] CAUTIN Before Servicing the unit, read the safety precautions in General SVC manual. nly for authorized service personnel.
1. Specification Nominal Capacity Cooling Btu/h (Min~Rating~Max) Heating Btu/h Nominal Input Cooling kw (Min~Rating~Max) Heating kw Nominal Capacity Cooling Btu/h (Min~Rating~Max) Heating Btu/h Nominal Input Cooling kw (Min~Rating~Max) Heating kw ATNH423MLAD 42,000 44,000 4.24 4.31 APNH423TLAD 42,000 44,000 4.67 4.63 utdoor Unit Compressor Type Refrigerant Charge Charge* g(oz) Type Fan Discharge Side/Top Noise Level(H/L) Sound Press,1m db(a)±3 Dimensions W*H*D mm (inch) Net Weight utdoor kg(lbs) Piping connections Liquid mm (inch) Gas mm (inch) Power Supply Cable(Includes earth) No.*AWG Interunit Cable(Includes earth) No.*AWG Max. Piping Length/Elevation m(ft) Power Supply Ø,V,Hz Running Current Cooling/Heating A Air Circulation CMM(CFM) Additional Refrigerant Charge (ver 7.5m) g/m(oz/ft) peration Range Cooling C( F) Heating C( F) Note: 1. Capacities are based on the following conditions: Cooling: - Indoor Temperature 27 C(80.6 F) DB/19 C(66.2 F) WB - utdoor 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 - utdoor Temperature 7 C(44.6 F) DB/6 C(42.8 F) WB Piping Length - Interconnecting Piping Length 7.5m - Level Difference of Zero AUUW423D [LUU425HV] Rotary 3600(127) R410A side 58 950*1380*330 (37.4*54.3*13.0) 103(227) 9.52 (3/8) 15.88 (5/8) No.*10 No.*18 50(164)/30(98) 1, 208~230, 60 17.7/16.7 55(1942) X 2 40(0.43) -10(14) ~ 43(109.4) -15(5) ~ 24(75.2) 2. Wiring cable size must comply with the applicable local and national code. 3. The specification may be subject to change without notic for purpose of improvement. nly for training and service purposes - 2 - LGE Internal Use nly
2. Function Table Category Reliability Convenience CAC network function Special function kit thers Function Defrost / Deicing High pressure switch Low pressure switch Phase protection Restart delay (3-minutes) Self diagnosis Soft start Test function Auto operation(artificial intelligence) Auto restart operation Network soluation(lgap) PDI(Power Distribution Indicator) PI485 Low ambient operation Thermistor AUUW423D - - X X X (program logic) - Note : : Applied, X: Not applied, - : No relation, ption: 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. nly for training and service purposes - 3 - LGE Internal Use nly
3. Piping Diagrams UTDR UNIT Refrigerant Flow Cooling Heating Reversing Valve High Pressure S/W Th4 Th2 Accumulator r Heat Exchanger Th1 Inverter Compressor Th5 Field Piping Gas (Ø 15.88mm) Liquid (Ø 9.52mm) E.E.V. Th3 LC. Description PCB Connector EEV Electronic Expansion Valve CN-EEV1 Th1 Thermistor for suction pipe temperature CN-TH2 Th2 Thermistor for discharge pipe temperature CN-TH2 Th3 Thermistor for condenser pipe temperature CN-TH1 Th4 Thermistor for outdoor air temperature CN-TH1 Th5 Thermistor for condenser middle pipe temperature CN-TH3 nly for training and service purposes - 4 - LGE Internal Use nly
4. Wiring Diagrams MAIN PCB ASSY INVERTER PCB ASSY CN_H/PRESS CN_ PWER CN_C/FAN CN_4WAY CENTRAL CNTRLLER PWER SUPPLY CN_EEV1 CN_CM(INV) CN_JIG_PC CN_CENTRAL CN_TH1 CN_TH2 CN_TH3 CN_WRITER CN_FLASH CN_CMM CN- MAIN(CM) CN- MTR2 CN- MTR1 CN_PWER CN(N) CN(L) nly for training and service purposes - 5 - LGE Internal Use nly
548490 561410 552116 135500 552203B 552203A 567480B 447910 268711C 263230D 658740 554031B 137213 546810 437211 349480B 349480B 435512 559010 435301 435301 546810 559010 549610 430410 W49810 268711D 567480C 554031A 649950 552112 552111 55211G 237204 352111B 661400 552117 554160 435300 W52102 437212 5. Exploded View Note) * Please ensure GCSC since the replacement parts may be changed depending upon the buyer's request. Please check the correct parts in View RPL(Replacement Part List) on GCSC. (GCSC Website http://biz.lgservice.com,) nly for training and service purposes -6- LGE Internal Use nly
P/N : MFL62129302 FEBRUARY, 2009