P1
Airwell Input Voltage Protection

Indoor unit shows P1; unit may run at reduced capacity or shut down; often related to voltage or phase issues.

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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

Low or high supply voltage, Unstable power grid, Loose supply connections, Incorrect wiring (for multi-phase units)

How to Fix / Troubleshooting

Safety: Electrical work should be done by qualified personnel. Turn off power before touching any terminals.

Steps:

  • 1. Measure supply voltage: Have an electrician measure voltage at the unit terminals and compare with the nameplate rating.
  • 2. Check for loose connections: With power OFF, tighten all supply and ground terminals.
  • 3. Use a stabilizer (if needed): In areas with unstable voltage, consider installing a voltage stabilizer or dedicated circuit.
  • 4. If voltage is correct: The outdoor PCB voltage detection circuit may be faulty and require replacement.
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Repair Difficulty

Hard 4/5

Required Part

Power Supply Circuit / Outdoor PCB
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