LG ARUV Series Service Manual page 264

Troubleshooting Guide
Error No.
41 (Main inverter compressor)
47 (Main constant compressor)
121 (Sub1 constant compressor 1)
122 (Sub1 constant compressor 2)
133 (Sub2 constant compressor 1)
134 (Sub2 constant compressor 2)
162 (Sub3 constant compressor 1)
163 (Sub3 constant compressor 2)
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 5MΩ(open) and less than 2kΩ (short)
Note: Standard values of resistance of sensors at different temperatures (±5% variation)
10°C = 362kΩ : 25°C= 200kΩ : 50°C= 82kΩ : 100°C= 18.5kΩ
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error Type
Compressor dis-
charge pipe tem-
perature sensor
error
No
Insert sensor connector to PCB properly
No
Replace sensor
No
Replace corresponding outdoor PCB
Check the resistance
inverter compressor
discharge temperature
sensor
- 264 -
Error Point
1. Defective connection of the
Sensor measurement
2. Defective discharge pipe com-
valve is abnormal
(Open/Short)
3. Defective outdoor PCB
Check the resistance
of constant compressor
discharge temperature
sensor
Main Reasons
compressor discharge pipe tem-
perature sensor
pressor sensor of the compres-
sor (open/short)
LGE Internal Use Only