
Troubleshooting Guide
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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Refer to CH41
Error No.
Error Type
Error Point
Main Reasons
Abnormal resistance value of
sensor measurement ( Open /
Short )
Compressor discharge
pipe temperature sen-
sor error
162 (Sub3 constant
compressor1)
163 (Sub3 constant
compressor2)
Refer to CH45
Error No.
Error Type
Error Point
Main Reasons
Abnormal resistance value of
sensor measurement ( Open /
Short )
Pipe sensor error of the
main and sub units heat
exchanger (A,B)
164 (Sub3 HEX A)
165 (Sub3 HEX B)
Refer CH113
Error No.
Error Type
Error Point
Main Reasons
Abnormal resistance value of
sensor measurement( Open /
Short )
Sensor error at the out-
door liquid refrigerant
pipe
166(Sub3)
Refer to CH114
Error No.
Error Type
Error Point
Main Reasons
Abnormal resistance value of
sensor measurement( Open /
Short )
Outdoor unit sub-cool-
ing sensor error at inlet /
outlet
167 (Sub3 sub-cool-
ing inlet)
168 (Sub3 sub-cool-
ing outlet)
Refer to CH34
Error No.
Error Type
Error Point
Main Reasons
Compressor Off due to the high
pressure sensor
Excessive rise in high
pressure
169(Sub3)
Refer to CH35
Error No.
Error Type
Error Point
Main Reasons
Compressor Off due to the low
pressure sensor
Excessive low pressure
drop
170(Sub3)
Refer to CH25
Error No.
Error Type
Error Point
Main Reasons
1. Input voltage in the installa-
tion region = 3phase
380V±10%
2. Single phase = 220V ±10%
Excessive Low voltage /
High voltage
171(Sub3)