Troubleshooting Guide 
- 56 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Self diagnosis Function
1 time
1
time
3 
sec
2
times
2times
3 
sec
4times
4
times
3 sec
5times
5times
3 sec
6
times
6
times
3 
sec
7
times
7
times
3 
sec
3 
sec
3 
sec
2
times
3 
sec
2
times
3 
sec
1
time
3 
sec
1
time
3 
sec
1
time
3 
sec
1time
2times
1time
1time 1time4 times 4 times
1time3 times 3 times
1time
1
2
4
5
6
7
Error Indicator
Error
Code
Cause of Error
Display
Indoor Outdoor
Indoor
Operation
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
• Indoor Temp. sensor error
  - Sensor open or short  
• Heat Sink sensor error 
 - Sensor open or short
 - Heat Sink temp is over 95°…
• Communication error  
• Outdoor Temp. sensor error
  - Sensor open or short
• DC Peak error  
• Over current error (CT2)
ON
ON
ON
OFF
SHUT
DOWN
SHUT
DOWN
9times
9
times
3 
sec
10times
10
times
3 sec
3 sec
3 sec
3 sec
3 sec
2times
10
ON
• Outdoor fan lock error
 • D-Pipe TH. is short or open.
  (BLDC fan model only)
OFF
8times 8times
3 
sec
8
• Indoor fan lock error
  (BLDC fan model only)
OFF
9
O
O
O
14
ON
• PSC  Error
  - PSC Fault Error
 
 • Comp Phase Current Error
   (180 Driver Comp Control 
    Model Only)
ON
12
• EEPROM  Error
  - EEPROM Check sum Error
 
ON
13