LG MULTI V M ARNU07GTU 4 Series Svc Manual page 71

Error No. Error Type
Compressor1
discharge pipe
411
temperature sensor
error
n Error diagnosis and countermeasure flow chart
Sensor connection to PCB
is normal?
Yes
Is the resistance of
sensor normal?*
Yes
Is sensor resistance
value same as temperature
value of LGMV?
Yes
Replace corresponding sensor
* Error is generated if the resistance is more than 5M(open) and less than 2k (short)
Note: Standard values of resistance of sensors at different temperatures (5% variation)
10C = 362k : 25C= 200k : 50C= 82k : 100C= 18.5k
Error Point
Sensor measurement
value is abnormal
(Open/Short)
No
Insert sensor connector to PCB properly
No
Replace sensor
No
Replace corresponding outdoor PCB
- 71 -
Troubleshooting Guide
Main Reasons
1. Defective connection of the compressor1 discharge
pipe temperature sensor
2. Defective discharge pipe compressor sensor of the
compressor1 (open/short)
3. Defective outdoor PCB
Check the resistance
inverter compressor
discharge temperature
sensor
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only training and service purposes.