LG ARUV Series Service Manual page 272

Troubleshooting Guide
Error
Error Type
No.
Heat sink temperature sensor
65
error of inverter control PCB
Error diagnosis and countermeasure flow chart
Is sensor connected
to PCB correctly?
Yes
Is value of sensor
resistance normal?*
Yes
Replace inverter fan PCB
* If value is 100KΩ ↑ (open) or 100Ω ↓ (short), error occurs
NB: Resistance value of temperature sensor change according to temperature
It is normal if value shown as below (±5% error)
Heat sink sensor(±5% tolerance) : 10°C = 20.0KΩ : 25°C= 10.0KΩ : 50°C= 3.5KΩ : 85°C= 1.0KΩ
Temperature sensor location of Heat sink
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Only for training and service purposes
Error Point
Abnormal value of sensor
(Open/Short)
No
Connect PCB to sensor
No
Replace sensor
Measure the resistance of heat sink temperature sensor
1. Loose connection of temperature sensor con-
nector
2. Defect of temperature sensor (Open/Short)
3. Defect of Fan Main PCB
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Main Reasons
LGE Internal Use Only