Troubleshooting
Samsung Electronics 205
4-3-45 Fan PBA IPM overheating error
Outdoor unit display
(FAN1 PBA)
(FAN2 PBA)
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 PBA
Remove foreign objects and
apply the heat sink grease.
And then reassembly
4-3 Appropriate Measures for Different Symptom (cont.)
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