Troubleshooting Guide
- 88 -
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Only for training and service purposes
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1. Defective connection of the compressor discharge
pipe temperature sensor
2. Defective discharge pipe compressor sensor of the
compressor (open/short)
3. Defective outdoor PCB
Error
No.
Error Type Error Point Main Reasons
Sensor measurement
valve is abnormal
(Open/Short)
Compressor dis-
charge pipe tempera-
ture sensor error
41
■ Error diagnosis and countermeasure flow chart
Check the resistance inverter compressor
discharge temperature sensor
Sensor connection to PCB
is normal?
Is the resistance of
sensor normal?*
Insert sensor connector to PCB properly
Replace sensor
Replace corresponding outdoor PCB
Yes
No
No
Is sensor resistance
value same as temperature
value of LGMV?
Yes
Yes
No
Replace corresponding sensor
* Error is generated if the resistance is more than 5MΩ(open) and less than 2kΩ (short)
Note: Standard values of resistance of sensors at different temperatures (±5% variation)
10°C(50°F) = 362kΩ : 25°C(77°F)= 200kΩ : 50°C(122°F)= 82kΩ : 100°C(212°F)= 18.5kΩ
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