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Model
LWC1262ACG_N_P LWC1262PCG_N_P LWC1262BCG_N_P LWC1262QCG_N_P LWC1262AHG_E LWC1262PHG_E
Pages
95
Size
3.41 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lwc1262acg-n-p-lwc1262pcg-n-p-lwc1262bcg-n-p-lwc12.zip
Date
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LG LWC1262ACG_N_P / LWC1262PCG_N_P / LWC1262BCG_N_P / LWC1262QCG_N_P / LWC1262AHG_E / LWC1262PHG_E Service Manual ▷ View online

—24—
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.
—25—
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
—26—
Electrical Parts Troubleshooting Guide
LWC1262PHG/PHE
Possible Trouble 1
The unit does not operate.
• Check the Fuse.
• Check the wiring diagram.
Is the Trans output power
AC 220V/240V?
Is the Trans output power
about AC 13V?
Is shorted the Trans. output?
Is output Voltage of IC2
DC 12V?
Is output Voltage of IC3
DC 5V?
Is the voltage No.20 of IC1
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 
IC1 is 5V.)
• Check the Fuse.
• Check the wiring diagram.
• Check the Main 
  PCB pattern.
• Exchange the Trans.
• Exchange BD1.
• Exchange IC2.
• Exchange IC3.
• Exchange IC4, C07.
• Connect connector
  exactly.
• Check the PCB 
  pattern.
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
YES
—27—
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.10
of IC7 0V?
• Exchange IC7.
• 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 N0.7 of 
IC 7 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
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