H5
Sharp
System Lockout Due to Repeated Protection Events
Unit stops and H5 is displayed; may be associated with multiple protection trips.
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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
Unresolved underlying faults (overheat, overcurrent, sensor errors), PCB lockout logic engaged, Power supply instability
How to Fix / Troubleshooting
Safety first: Do not repeatedly reset the unit without addressing the root cause. Turn off power at the breaker.
- Review history: Note any previous error codes (e.g., H3, F4, E5) that occurred before H5. Those indicate the underlying problem.
- Correct root cause: Clean coils, check fans, verify sensors, and have refrigerant/system issues professionally repaired.
- Clear lockout: After repairs, disconnect power for at least 15 minutes to clear the lockout. Restore power and test.
- PCB replacement: If H5 persists with no other active faults, the control PCB may be defective and require replacement.
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Repair Difficulty
Hard
4/5
Required Part
Outdoor Main Control PCB
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