Samsung AM072BXV Series - Case Study - E455 (Fan IPM Overheat Error)

Samsung Electronics 172
Troubleshooting
4-4-15 Case study – E455 (Fan IPM overheat error)
- Problem : system failure by E455
- Condition : Discharge guide duct 20m with motorized damper
- Trouble shooting
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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
4-4 Case study for trouble shoots (cont.)
FAN PBA
Heat sink