Panasonic · Air Conditioner

Panasonic Air Conditioner H11 error code

Difficulty: Medium · Cost: $0–$150 · Duration: 5m

The H11 error means your Panasonic air conditioner detected a communication failure between the indoor and outdoor units. This is one of the most common Panasonic AC error codes and can be caused by incorrect wiring during installation, a power interruption, or a control board fault. A power reset clears it in some cases. If H11 keeps returning the wiring and control boards will need professional inspection.

Common causes

Communication wiring between indoor and outdoor units is incorrectly connected or damaged
Power interruption disrupted communication between the units
Control board fault on either the indoor or outdoor unit
Unit was recently installed or relocated with incorrect wiring

How to fix it

1

Turn off the air conditioner at the circuit breaker and wait 5 minutes
2

Turn the circuit breaker back on and check if H11 has cleared
3

If H11 appeared after installation check that all wiring between the indoor and outdoor units is correctly connected
4

If H11 keeps returning contact a qualified technician to inspect the communication wiring and control boards