Unit shows H5; system may not start or may shut down quickly

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

Shorted compressor, Shorted IPM module, Incorrect supply voltage, Wiring short to ground

Safety first: This is a high-risk electrical fault. Turn off power and do not attempt repeated restarts.

Steps (user level):

1. Check for burning smell: If you smell burnt electronics from the outdoor unit, leave power OFF and call a technician.
2. Inspect wiring: With power OFF, look for obvious shorts, burnt wires, or melted insulation in the outdoor unit.

When to call a technician: H5 almost always requires a professional to test compressor windings, insulation resistance, and the IPM module.

Professional Required 5/5

Outdoor Inverter PCB

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