H5
Chigo
IPM (Inverter Power Module) Protection / Malfunction
Indoor unit shows H5 and the outdoor unit does not start.
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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.
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Possible Causes
Shorted IPM module on Chigo outdoor PCB, Short circuit in compressor, Overcurrent due to blocked condenser or fan failure, Faulty current sensor on PCB
How to Fix / Troubleshooting
Safety first: High-voltage inverter circuits are dangerous. Only trained technicians should service them.
- Step 1 – Basic checks: Ensure the outdoor coil is clean and the fan operates normally to avoid overloading the inverter.
- Step 2 – Professional testing: A technician should test compressor windings, measure insulation resistance, and check the IPM module for shorts.
- Step 3 – Replace components: Replace the outdoor main PCB (with IPM) if the module is faulty, or the compressor if it is shorted.
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Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Main PCB
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