DOWNLOAD LG LWM1560BHE / LWM1861BHE / LWM1861BHG / LWN1862BHG / LWN2262BHG Service Manual ↓ Size: 2.32 MB | Pages: 67 in PDF or view online for FREE

Model
LWM1560BHE LWM1861BHE LWM1861BHG LWN1862BHG LWN2262BHG
Pages
67
Size
2.32 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lwm1560bhe-lwm1861bhe-lwm1861bhg-lwn1862bhg-lwn226.zip
Date
PREV: LG LWJ0561ACG Service Manual

LG LWM1560BHE / LWM1861BHE / LWM1861BHG / LWN1862BHG / LWN2262BHG Service Manual ▷ View online

Electrical Parts Troubleshooting Guide : LWN1860QHG(QHL)/ LWN2260QHG(QHL)
—19—
Possible Trouble 1
The unit does not operate.
• Check the Fuse.
• Check the wiring diagram.
Is the Trans output power
AC 220V?
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
Is setting 
Temp. set lower  than Room 
Temp.-0.5
°
C?
Is the voltage No.10
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 N0.7 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
—20—
Possible Trouble 2
The compressor does not operate.
Possible Trouble 3
The compressor always operate.
—21—
• Exchange IC01M.
• Exchange IC01M.
Is the voltage NO.2 or 3
of IC01M DC 5V?
Is the voltage NO.14 or 15
of IC01M 0V?
• Check the RY-Hi or 
               RY-Lo.
• Check the wiring diagram.
NO
NO
YES
YES
• Exchange Micom.
• Exchange IC01M.
• Check the PCB pattern.
Is the voltage NO.6
of IC01M DC 5V?
Is the voltage NO.11
of IC01M 0V?
• Check the RY-SYNC.
• Check the connectionn 
  of CN-SYNC.
NO
NO
YES
YES
Possible Trouble 4
FAN does not operate.
Possible Trouble 5
Auto Swing does not operate. 
—22—
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
Possible Trouble 6
Remote controller does not operate.
Possible Trouble 7
It displays abnormally on display PCB Ass'y.
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Display

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