Fan Ipm Overheat Error - Samsung AM022FN1DEH/TK Service Manual

Troubleshooting

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
4-114
(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
Tighten Bolt
Samsung Electronics