LG A3UW243FA0 User manual

Multi Air Conditioner
SVC MANUAL(Exploded View)
Model : A3UW243FA0(LMU245HV)
CAUTION
Before Servicing the unit, read the safety precautions in Standard SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com

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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Specification
Note :
1. Capacities are based on the following conditions:
Cooling: - Indoor Temperature 26.7°C(80°F) DB/19.4°C(67°F) WB
- Outdoor Temperature 35°C(95°F) DB/23.9°C(75°F) WB
Heating: - Indoor Temperature 21.1°C(70°F) DB/15.6°C(60°F) WB
- Outdoor Temperature 8.3°C(47°F) DB/6.1°C(43°F) WB
Piping Length - Interconnecting Piping Length 7.5m(24.6 ft.)
- 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.
4. At least two indoor units should be connected.
5. For more Capacity(*),refer to the combination table
Conversion Formula
kW = Btu/h class X 0.0002931
cfm = CMM x 35.3
Capacity(*) Btu/h Class
Power Input Cooling kW
(Min._Rated~ Max.) Heating kW
Running Current (Rated) Cooling A
Heating A
Starting Current Cooling/Heating A
Power Supply Ø / V / Hz
Power Supply Cable (Outdoor) No.x AWG
Transmission Cable (Outdoor to Indoor unit ) No.x AWG
Dimensions W x H x D mm(inch)
Net Weight kg(lbs)
Max. Number of Connectable Indoor Units
Type
Qty x Model
Compressor Motor type
Oil charge volume cc
Oil Type
Cycle A Charge (at 7.5m) g(oz)
Refrigerant Cycle B Charge (at 7.5m) g(oz)
Type
Control
Heat Exchanger (Rows x Column x FPI) x No.
Coil tube dia. mm(inch)
Defrosting Method
Capacitor µ/Vac
Fan motor Drive
Discharge Direction(Side/Top)
Air Flow Rate x No. of Fan CMM(CFM)
Sound Level(H/L) Sound Pressure dB(A)+3
Liquid(Cycle A) mm(inch)
Piping Connections Gas(Cycle A) mm(inch)
Liquid(Cycle B) mm(inch)
Gas(Cycle B) mm(inch)
Piping length spec. Max. total piping m(ft.)
Max. OD~ID piping m(ft.)
Piping Length (no add'l refrigerant) m(ft.)
Max. Elevation Outdoor Unit~Indoor Unit m(ft.)
Difference Indoor Unit~Indoor Unit m(ft.)
Operation Range Cooling ˚C(˚F)
(Outdoor) Heating ˚C(˚F)
24,000
0.72~1.98~3.27
0.72~2.86~3.5
3.0~8.8~14.5
4.5~12.4~15.5
-
1/208~230/60
3 x12
4 x 18 (Including Earth)
870x808x320(34 1/4x31 13/16x12 9/16)
65(143.3)
3
Twin-Rotary
5KD240X
BLDC
900
FV50S
2,550(89.95)
-
R410A
EEV
(2Rx36Cx18) x1
7(0.276)
Reversing cycle
-
Direct (DC)
Side
60(2,118)
52
6.35(1/4) x 3EA
9.52(3/8) x 3EA
-
-
75(246.1)
25(82.0)
37.5(123.0)
15(49.2)
7.5(24.6)
-10 ~ 46 (14~114.8)
-15 ~ 24 (5~75.2)
A3UW243FA0(LMU245HV)
Outdoor Unit

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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2. List of Functions
Note :
O : Applied, X : 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.
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
Central control(LGAP)
PDI(Power Distribution Indicator)
PI485
Low ambient operation
Thermistor
O
X
X
X
O
O
O
X
O
O
X
X
X
O
-
FunctionCategory
A3UW243FA0(LMU245HV)
Reliability
Convenience
Others
Special function kit
CAC Network
Function

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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
3. Piping Diagrams
Reversing
Valve
Outdoor Unit
Th1
Th3
Th2
Th4
Accumulator
Field piping
Liquid(Ø1/4")
Field piping
Gas(Ø3/8")
Room C
Room B
Room A
Compressor
Heat
Exchanger
EEV-C
EEV-B
EEV-A
Room C
Room B
Room A
COOLING
HEATING
REFRIGERANT FLOW
Main service
Valve(Gas)
Main service
Valve(Liquid)
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

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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
4. Wiring Diagrams
CN_PFC_OUT
CN_TH3(SUC/DISP_I)
CN_EEV3
CN_COM
CN_PFC-IN CN_4WAY
CN_EEV2CN_EEV1
CN_TH2(AIR/PIPE)
CN_MOTOR 1

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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
5. Exploded View
W4810
559010
552112
554031
546810
430411
554160
137213A
435300
137213B
435301
349480
437211
435512
437210
435511
552116
W6200
W49810
549610
268711
447910 548490
649950
552113
567480D
SUC/DIS
AIR/PIPE
567480E
SERVICEMANUAL
INSTALLMANUAL
OWNERSMANUAL
661400A
552200
661400B
661400C
552203B 552203A
W51620B W51620A
W4986B
W4986A
W6640B
W6640C
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,)

P/NO : MFL61777611 FEBRUARY, 2009