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Model
LWG0760ACG LWG0760QCG LWG0820ACG LWG0821ACG LWG0960AAG LWG0960ACG LWG0960ACN LWG0960ACS LWG0960QAS LWG0960QCG LWG0960QAG KC10WR LWG0761PCG
Pages
66
Size
2.7 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lwg0760acg-lwg0760qcg-lwg0820acg-lwg0821acg-lwg096.zip
Date
PREV: LG LWG0760ACG / LWG0760BCG / LWG0760PCG / LWG0760QCG / LWG0960ACG / LWG0960BCG / LWG0960PCG / LWG0960QCG / LWG0720ACG / LWG0720NCG / LWG0820ACG / LWG0820PCG / LWG0821ACG / LWG0821DCG / WG0760ACG Service Manual

LG LWG0760ACG / LWG0760QCG / LWG0820ACG / LWG0821ACG / LWG0960AAG / LWG0960ACG / LWG0960ACN / LWG0960ACS / LWG0960QAS / LWG0960QCG / LWG0960QAG / KC10WR / LWG0761PCG Service Manual ▷ View online

—21—
• Check the Fuse.
• Check the wiring diagram.
Is the Trans input power
AC 115V?
Is the Trans output power
about AC 14V?
Is shorted the Trans. output?
Is output Voltage of IC01D
DC 12V?
Is output Voltage of IC02D
DC 5V?
Is the voltage No.20 of Micom
DC 5V?
Exchange Main PCB Ass'y.
Is the 
connection between
Main and Display 
all right?
Is the reset circuit all right?
(The No.16 of
Micom is 5V.)
• Check the Fuse.
• Check the wiring diagram.
• Check the Main 
  PCB pattern.
• Exchange the Trans.
• Exchange D02D~D05D.
• Exchange IC01D.
• Exchange IC02D.
• Exchange IC01A, C02A.
• Connect connector
  exactly.
• Check the PCB 
  pattern.
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
YES
■
ELECTRICAL PARTS TROUBLESHOOTING GUIDE: M8000R, M-8000
Possible Trouble 1
The unit does not operate.
—22—
Possible Trouble 2
The compressor does not operate.
Possible Trouble 3
The compressor always operate.
Is setting 
Temp. set lower  than Room 
Temp.-0.5
°
C?
Is the voltage No.11
of IC01M 0V?
• Exchange IC01M.
• Select the setting Temp. to lower Number.
• Wait 3 Minutes.
Is the Unit for 3 minutes
delay?
• Exchange MAIN 
  PCB Ass'y.
Is the voltage N0.6 of 
IC01M DC 5V?
• Check the RY-COMP.
• Check the wiring 
  Diagram.
NO
NO
NO
YES
YES
YES
YES
Is the wire connection of 
RY-COMP all right?
• Check the RY-COMP.
• Connect LEAD Wire to 
  RY-COMP again.
NO
YES
NO
—23—
Possible Trouble  4
FAN does not operate.
Possible Trouble 5
The function of Energy Saver does not operate.
• Exchange IC01M.
• Exchange IC01M.
Is the voltage NO.2 or 3 or 4
of IC01M DC 5V?
Is the voltage NO.13 or 14 or 15
of IC01M 0V?
• Check the RY-Hi or
RY-Med or RY-Lo.
• Check the wiring diagram.
NO
NO
YES
YES
NO
NO
YES
YES
Is the Knob of SW1
set to left position?
Is the voltage No.1 of 
CN-DISP1 of Main PCB
Ass'y DC 5V?
• Reference to 
  OWNER'S MANUAL.
• Set the Knob of SW1 
  to left position.
• Check the SW1.
• Check the pattern of 
  Main & Display PCB.
—24—
Possible Trouble 6
Remote controller does not operate.
Possible Trouble 7
It displays abnormally on display PCB Ass’y.
NO
NO
NO
NO
YES
YES
YES
Is the IC01G all right?
Is the connection of 
CN-DISP2 all right?
• Exchange the display 
  PCB Ass'y. 
• Exchange IC01G.
• Exchange Q12G, 
  Q13G, Q14G.
• Connect connector 
  to CN-DISP2 exactly.
Does the Q12G, 
Q13G, Q14G operate normally
on main PCB Ass'y?
• Check the PCB pattern.
Is the voltage of Battery
about over 2.3V?
• Exchange Receiver Ass'y.
Is the connection of 
CN-DISP2 all right?
Is the voltage No.10 
of CN-DISP2 on Main PCB 
Ass'y DC 5V?
• Exchange the battery.
• Check the PCB pattern.
• Connect connector to 
  CN-DISP2 exactly.
NO
NO
NO
YES
YES
YES
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