Air con error code

Hello, i have Hitachi Aircon and the heating no longer works, the error code is 53.

Asked by Raheem on 6th Jan 2026
Expert Trade Answers
"The outdoor unit’s inverter electronics have detected an unsafe condition and stopped the system running. It’s not usually a simple thermostat or sensor it’s about the power/inverter module or associated circuits.Would require a qualified hvac technician to inspect and repair."
Answered on 6th Jan 2026 - Member since Sep 2023 - report
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