LG AMNW07GSJA0 Svc Manual page 168

6.7 Troubleshooting Outdoor Error
CH 65 (Heat sink Temperature Sensor Open/Short)
Items
Purpose
Condition for Generation Detected temperature is ≤ -40 ℃ or ≥ 200 ℃.
Items for checking
Working Temperature
Replacing PCB
Environmental factor checking method
1) The products works when outdoor temperature is ≤ -20 ℃.
2) Generation of CH65 case 10 minutes after the operation of the product
If both of above-stated conditions are satisfied, environmental factor is the cause.
Sensor checking method
1. Power Off
2. Measure the resistance using a tester.
3. Measure the resistance Heat sink Temp point (Refer to the next page)
(based on 25 ℃, 10 kΩ ± 10 %)
Prevention of damage or wrong control of PCBA (PSCM/PFCM,IPM)
caused by heat sink temperature detection error
- 167 -
Contents
Sub-items for checking
Outdoor Temperature
Copyright © 2016 - 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
5. Trouble Shooting