Royal Clima IPM (Intelligent Power Module) Protection / Inverter Module Fault

Indoor unit shows H5, unit may not start or may shut down shortly after starting.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Overcurrent or overtemperature in inverter module, Shorted compressor, Defective IPM on outdoor PCB, Poor heat dissipation from power module

Safety first: Turn OFF the breaker and do not attempt to run the unit repeatedly with H5 present.

Step 1 – Visual inspection: Open the outdoor unit and inspect the inverter PCB for burn marks or damaged components.
Step 2 – Ensure ventilation: Confirm that the outdoor unit is not enclosed in a tight space causing overheating.

When to call a technician: H5 is a critical inverter fault and requires professional diagnosis and likely PCB replacement.

Professional Required 5/5

Outdoor Inverter PCB

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