Overview

This procedure outlines the correct and safe process to access and remove the Inverter PCB located within the R32 ducted outdoor unit.
Following these steps ensures safe isolation of AC and DC circuits, prevents PCB damage, and maintains proper service standards during main or inverter PCB replacement.

1. Accessing the Electrical Module





2. Power Isolation and Voltage Verification


3. Disconnecting the Main Outdoor PCB



4. Exposing the Inverter PCB



5. Disconnecting Remaining Components



6. Removing the Mounting Plate



7. Accessing the Inverter PCB Assembly




8. Completion

  • After repair or replacement:

    • Reinstall all components in reverse order.

    • Confirm all harnesses are fully seated.

    • Reapply power and verify LED operation on the main PCB.

    • Perform system test run to confirm stable operation.

Safety & Technical Notes

  • Always handle PCBs using anti-static precautions.

  • Do not overtighten heatsink screws; torque to manufacturer’s specification only.

  • If an inverter replacement is performed, ensure firm heat transfer contact between module and plate.

  • Log all serial numbers and PCB revision codes in the service report.