LG ARUN Series Service Manual page 103

Error No.
41*
(Inverter)
Master 411
Slave 412
47*
(Constant)
Master 471
Slave 472
I 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(50°F) = 362kΩ, 25°C(76°F)= 200kΩ, 50°C(122°F)= 82kΩ, 100°C(212°C)= 18.5kΩ
Copyright ©2007 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
- 103 -
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
Troubleshooting Guide
Main Reasons
compressor discharge pipe tem-
perature sensor
pressor sensor of the compres-
sor (open/short)
LGE Internal Use Only