LG C18AWU.U81 User manual

Room Air Conditioner
SVC MANUAL(Exploded View)
MODEL : AS-W1868RH1(C18AWR N81/C18AWU U81)
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Specification
Cooling Capacity kW
(Min~Rating~Max) Btu/h
Heating Capacity kW
(Min~Rating~Max) Btu/h
Power Input Cooling/Heating W
Running Current Cooling/Heating A
Starting Current Cooling/Heating A
EER W/W
Btu/h.W
COP W/W
Power Supply Ø / V / Hz
Power Factor %
Air Flow Rate Indoor,Max m3/min(CFM)
Outdoor,Max m3/min(CFM)
Moisture Removal l/h
Sound Level Indoor,H/M/L dB(A)+3
Outdoor,Max dB(A)+3
Refrigerant & Charge(at 7.5m) g(oz)
Additional Refrigerant Charge g/m(oz/ft)
Compressor Type
Model
Motor Type
Oil Type
Oil Charge cc
O.L.P Name
Fan(Indoor) Type
Motor Output W
Fan(outdoor) Type
Motor Type
Motor Output W
Circuit Breaker* A
Power Supply Cable No.*mm2
Power and Transmission Cable No.*mm2+No.*mm2
Piping Liquid Side mm(in)
Connections Gas Side mm(in)
Drain Hose O.D , I.D mm(in)
Dimension Indoor(W*H*D) mm
inch
Outdoor(W*H*D) mm
inch
Net Weight Indoor kg(lbs)
Outdoor kg(lbs)
Operation Range Cooling(Outdoor) ˚C
Heating(Outdoor) ˚C
Max. Piping Length m
Max. Elevation Difference m
Tool Code(Chassis) Indoor + Outdoor
Functions Temperature Control
Plasma Filter
Prefilter(washable/anti-fungus)
Auto Clean
CHAOS Wind(Auto Wind)
Steps, Fan/Cool/Heat
Airflow Direction Control(up&down)
Airflow Direction Control(left&right)
Remocon Type
Setting Temperature Cooling
Range Heating
Auto Operation (Micom Control)
Auto Changeover (Micom Control)
Self Diagnosis
Timer
Sleep Operation
Soft Dry Operation
Restart Delay(minute)
Deice Control(Defrost)
Hot Start
Jet Cool
Low Ambient Operation
Special Function
Network Functions Dry Contact
Network Solution(LGAP)
PI485
Models AS-W1868RH1(C12AWR N81/C18AWU U81)
1.76~5.28~5.80
6000~18000~19800
1.40~6.07~6.65
4800~20700~22700
1640 / 1770
7.3/8.3
7.3/8.3
3.22
10.9
3.43
1/220~240/50
98.3
16(565)
42(1483)
2.1
42/39/36
55
R410/1200(42)
20(0.22)
E-SCROLL
5CS130XCC03
BLDC
RB68A
480
CS-7L N120
Cross Flow Fan
20
Propeller
AC Induction
65
20
3*1.5
4*1.5(Including Earth)
6.35(1/4)
12.7(1/2)
21.5,16(0.85,0.63)
1107*299*200
43.6*11.8*7.9
870*655*320
34.3*25.8*12.6
14.1(31.09)
46(101)
-5 ~ 43(Low Ambient)
-10 ~ 24
15
7.0
S8+UE
Thermistor
O
O
O
O
3/4/4
Auto
Auto
Wireless LCD
18~30˚C
16~30˚C
-
O
O
24h,On/Off
O
O
2
O
O
O
O
-
-
-
-
Note:
O : Applied, - : No relation
*
For circuit breaker rating, please conform to local standards wherever necessary.
❈ Some of functions are slightly different depending upon models.
❈ The specification may be subject to change without prior notice for purpose of
improvement.

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2. Piping Diagrams
Indoor Unit Outdoor Unit
Heat
Exchanger
(Evaporator)
Heat
Exchanger
(Condenser)
EEV
Compressor
Gas Side
3-Way Valve
2-Way Valve
Liquid Side
Cooling
Heating
Reversing Valve
Th1
Th2
Th3
Th5
Th4
Th6
Th7
LOC. Description PCB Connector
Th1 Thermistor for indoor air temperature CN_TH1(INDOOR)
Th2 Thermister for indoor pipe(in) temperature CN_TH2(INDOOR)
Th3 Thermister for indoor pipe(out) temperature CN_TH3(INDOOR)
Th4 Thermistor for outdoor air temperature CN_TH2(OUTDOOR)
Th5 Thermister for outdoor pipe temperature
Th6 Thermistor for discharge pipe temperature CN_TH3(OUTDOOR)
Th7 Thermistor for suction pipe temperature
EEV : Electronic Expansion Valve

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
3. Wiring Diagrams
CN-MOTOR1
CN_L/R(BL) CN_UD (WH) CN_SUB(GRY)
CN_DISP1(WH)
CN_TH2(WH)
CN_TH1(YL)
CN_TH3(BK)
CN_HVB(BL)
Indoor Unit

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
CN_FAN(A) CN_4WAY
CN_COIL1
CN_COIL2
CN_TH2
(AIR/PIPE)
CN_TH3
(SUC/DIS_I)
CN_LEV1 CN_COM
OPTION(6877A20049C)
Outdoor Unit

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Indoor Unit
4. Exploded View
264110
359011
148000A
152302
135800
135080
135511
137211
135316 152313
263040
266001
131410 733010
135500A
352150
147581 146811A
135516
146811B
146811B
263230A
268711E
268711G
159830
35211B
W6640
268711C
263230B
135311
354210
149304
354212
249951
342800
266090
149303
346810
267110
268711H
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,)

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Outdoor Unit
554031 263230B
435512
437212
435511
268711F
552202
552116
554160
550140
552203A
552203B
430411
447910
261704
567480E
Discharge
Suction
649950
W0CZZ
437211
559010
546810
435301
349480
349600
561410
661400
552113
437210
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 : MFL37062929 DEC. 2007