Fan Ipm Overheat Error - Samsung AM007FN1DCH/AA Service Manual

4-4-70 Fan IPM Overheat error

Outdoor unit
display
Judgment
∙ IPM internal temperature more than 85°C (E455, E355)
Method
Cause of prob-
∙ Heat sink and IPM assembly defective.
∙ Defective heat sink cooling
lem
1. Cause of problem
Did check the foreign objects between
Is the bolt of the heat sink fully tightened?
Did check the foreign objects between
Samsung Electronics
(FAN1 PCB)
(FAN2 PCB)
Power Off
the heat sink pin?
Yes
Yes
the heat sink and IPM?
Yes
Complete
No
Remove foreign objects
*Cold heat sink assembly defect occurs.
No
Remove foreign objects and
No
apply the heat sink grease.
And then reassembly
Troubleshooting
Tighten Bolt
4-109