Outdoor unit does not operate; indoor unit may run briefly then stop; H16 displayed.
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.
Possible Causes
How to Fix / Troubleshooting
Warning: This fault involves high-voltage DC circuits. Only proceed with basic visual checks. Detailed diagnosis should be done by a professional.
Basic checks:
- 1. Power off: Turn off the breaker and outdoor isolator. Wait at least 10 minutes.
- 2. Visual inspection: Remove outdoor panel and inspect the PCB for burnt marks, cracked components, or melted connectors. Check compressor and fan motor wiring for insulation damage.
- 3. Fan motor check: Spin the outdoor fan blade by hand (power OFF). It should rotate freely without grinding. A seized fan can cause overcurrent.
- 4. Wiring tightness: Ensure all power terminals (L, N) and compressor/fan connectors are tight.
Do not attempt to bypass sensors or run the unit with suspected shorts. If H16 persists, a technician should test compressor windings, fan motor, and the DC current sensor on the PCB and replace the faulty component.
Repair Difficulty
Required Part
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