In this video, we take you step-by-step through the repair process of a Gree mini-split air conditioner circuit board (PCB) that initially showed an E6 error. If you haven’t watched part one yet, we recommend checking it out for better context on the work already completed. Here, we diagnose faulty capacitors, measure voltage levels on key components such as C26, C67, and C20, and explain how to test low voltages systematically. We also address common repair challenges, including communication errors and compressor startup issues. Key fixes include replacing the optic coupler, diodes, and the IPM module and restoring full functionality to the PCB. Additionally, we discuss why removing components like capacitors and double reactors helps in pinpointing faults. Stay tuned for a detailed voltage testing video in the next installment to deepen your understanding of troubleshooting and repairing mini-split air conditioner circuit boards.
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