Gree IPM Protection or Current Sensing Fault

Display shows H5; unit may not operate or may shut down immediately.

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

Defective current sensor on outdoor PCB, Short circuit in compressor or fan motor, IPM overheating, Wiring short to ground

Safety first: High‑voltage diagnostics must be done by qualified personnel only.

Step 1 – Do not repeatedly restart: This can worsen damage to the inverter module.
Step 2 – Visual wiring check: With power OFF, inspect outdoor wiring for obvious shorts, burnt insulation, or loose terminals.
Step 3 – Technician service: A technician should measure insulation resistance, check current sensor output, and likely replace the outdoor PCB if confirmed faulty.

Professional Required 5/5

Outdoor Main PCB

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