LG ACHH Series Manual page 82

Error code check
Error number Errors
Excessive temperature
rise at the inverter
62
board heat radiation
n How to diagnose the disorder
Is the operation status normal?
Yes
Are the inverter board and the heat
radiation plate locked correctly?
Yes
Is the heat radiation plate motor
normal?
Yes
Is the inverter board normal?
Yes
Check power and installation
environment again.
Check the inverter board and heat radiation plate locking status
❈ Check screw connection condition
Meaning
If the temperature
detected at the heat
radiation plate is 90 °C
plate or higher
No
No
No
No
1. Cooling fan locking status defect
2. Inverter board power module locking status defect
3. Outdoor unit plate motor abnormal operation
4. Outdoor unit inverter board defect
5. Overload operation
1. Check pipe damage/twist status
2. Check locking status (outdoor unit/indoor unit)
3. Check whether EEV is correctly locked
4. Check refrigerant pressure
5. Check power wire locking status
1. Check inverter board screw locking status
→ If a problem is found, assemble again and take
necessary actions
1. Check abnormal operation of the heat radiation fan motor
→ If a problem is found, replace heat radiation fan motor
1. Replace the inverter board
- 82 -
Main cause of occurrence