F7
Haier
Compressor Position / Inverter Module Fault (DC Inverter Models)
Indoor unit shows F7 and the compressor may not start or may shut down quickly.
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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
Faulty inverter compressor, Defective IPM (Intelligent Power Module) on outdoor PCB, Loose compressor terminal connections, Incorrect phase detection
How to Fix / Troubleshooting
Safety first: Turn off power and wait several minutes for capacitors in the inverter module to discharge. High voltages are present; only qualified personnel should work on inverter circuits.
- Visual inspection: Open the outdoor control box and inspect the inverter PCB for burn marks, bulged capacitors, or cracked components.
- Check compressor terminals: Ensure the compressor's multi-pin connector or terminals are tight and free of corrosion.
- Do not bypass protections: Never attempt to bypass the inverter protections or run the compressor directly from mains.
- Professional service: F7 typically requires advanced diagnostics. A technician may need to test compressor windings and replace the outdoor inverter PCB or compressor.
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Repair Difficulty
Professional Required
5/5
Required Part
Inverter Compressor
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