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

Indoor unit displays H5; the unit may not start or may shut down shortly after starting.

Safety Warning

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 the inverter module, Shorted compressor, Defective IPM on the outdoor PCB, Poor heat dissipation from the power module

How to Fix / Troubleshooting

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.

Repair Difficulty

Professional Required 5/5

Required Part

Outdoor Inverter PCB

Check Price on Amazon

We may earn a commission from links on this page.