Samsung AM072FXVAFH series - Fan IPM Overheat Error

Troubleshooting
4-94 Samsung Electronics
4-4-45 Fan IPM Overheat error
Outdoor unit display
(FAN1 PCB)
(FAN2 PCB)
Judgment Method
 IPM internal temperature more than 85°C (E455, E355)
Cause of
problem
 Heat sink and IPM assembly defective.
 Defective heat sink cooling
Power Off
Yes
Did check the foreign objects
between the heat sink pin?
Remove foreign objects
*Cold heat sink assembly defect occurs.
No
Yes
Is the bolt of the heat sink fully tightened?
Tighten Bolt
No
Yes
Did check the foreign objects
between the heat sink and IPM?
No
1.
How to check
Replace fan PCB
Remove foreign objects and
apply the heat sink grease.
And then reassembly