F5
Sharp
Outdoor Unit Overload / Current Protection
Unit stops intermittently; F5 appears, often during extreme ambient conditions.
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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
Blocked condenser coil, Failing compressor drawing high current, Faulty inverter IPM current sensing, Incorrect supply voltage
How to Fix / Troubleshooting
Safety first: High current faults can be dangerous. Turn off power at the breaker and do not repeatedly reset if F5 recurs.
- Clean and clear outdoor unit: Ensure the condenser coil is clean and airflow is unobstructed.
- Check supply voltage: Have a qualified person measure line voltage at the outdoor unit. Correct any wiring or supply issues.
- Listen to compressor: If the compressor is unusually loud, clicking, or struggling to start, it may be failing and drawing excessive current. This requires professional replacement.
- Inverter module / PCB: If mechanical causes are ruled out, the inverter IPM or current sensor on the outdoor PCB may be faulty. Replace the PCB via an authorized Sharp service provider.
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Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Inverter PCB
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