Indoor unit shows H50; operation stops or is limited.

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

Corrupted indoor PCB memory, Power surge damage, Faulty indoor control PCB

Safety first: Turn off power at the breaker.

Steps:

1. Power reset: Leave power off for at least 5–10 minutes to allow full reset, then restore power and test.
2. Surge protection: If the error occurred after a storm or power event, consider installing a surge protector for the AC circuit.

If H50 returns, the indoor PCB will likely need replacement. This should be done by a technician to ensure correct part selection and configuration.

Hard 4/5

Indoor Control PCB

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