Samsung AM080 XV Series - Fan IPM Overheat Error

Troubleshooting
Samsung Electronics 4-67
4-3-45 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
Does the heatsink
fixing bolt are tightened completely?
Tighten Bolt
No
Yes
Did check the foreign objects
between the heat sink and IPM?
No
1.
Cause of problem
Replace fan PCB
Remove foreign objects and
apply the heat sink grease.
And then reassembly