In this video, I have provided a detailed functional description of the Inverter AC outer unit card, focusing on the role of EMI filters and the Power Factor Corrector (PFC). I also discuss the IPM module for this card, which was brought in with a fault showing no error codes but was not operating correctly. Through troubleshooting, I discovered that the feedback resistance in the VDR circuit was malfunctioning. After replacing the VDR resistances, I reinstalled the card in the outer unit, resolving the issue successfully.
- Functional description of the Inverter AC outer unit card
- Role and importance of EMI filters
- Action of the Power Factor Corrector (PFC)
- Introduction to the IPM module
- Troubleshooting steps for the non-working unit
- Repairing the VDR circuit by replacing the faulty resistances
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