Samsung AM007FN1DCH/AA - Fan IPM Overheat Error

Troubleshooting
4-104 Samsung Electronics
4-4-70 Fan IPM Overheat error
Outdoor unit
display
(FAN1 PCB)
(FAN2 PCB)
Judgment
Method
 IPM internal temperature more than 85°C (E455, E355)
Cause of prob-
lem
 Heat sink and IPM assembly defective.
 Defective heat sink cooling
Power Off
Ye s
Did check the foreign objects between
the heat sink pin?
Remove foreign objects
*Cold heat sink assembly defect occurs.
No
Ye s
Is the bolt of the heat sink fully tightened?
Tighten Bolt
No
Ye s
Did check the foreign objects between
the heat sink and IPM?
No
1.
Cause of problem
Complete
Remove foreign objects and
apply the heat sink grease.
And then reassembly