Panasonic
No Power to Indoor Unit
Unit will not start at all; no lights on indoor unit.
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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
Tripped circuit breaker, Blown indoor PCB fuse, Loose power wiring at indoor terminal block, Faulty indoor PCB
How to Fix / Troubleshooting
Safety first: Working with mains voltage is dangerous. If unsure, call an electrician or technician.
Steps:
- 1. Check breaker: Verify the dedicated AC breaker has not tripped. Reset if necessary.
- 2. Confirm outlet/supply: If the indoor unit is plugged into a socket, test the socket with another appliance.
- 3. Inspect indoor unit fuse: With power OFF, remove the indoor front cover and locate the small glass or blade fuse on the PCB. If blown, replace only with the same rating and investigate cause if it blows again.
- 4. Check terminal block: Ensure L and N wires are securely fastened at the indoor unit.
If there is power at the terminals but no lights or response, the indoor PCB is likely faulty and should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Indoor Control PCB
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