BoilerFaultCodesTechnical description
Inverter Error
What causes this fault?
This fault occurs when the internal brain of the heat pump loses communication with the power system or detects an electrical surge. It typically signals that the inverter board has failed or is trying to protect the compressor from damage due to unstable voltage. The system shuts down immediately to prevent expensive electrical components from burning out.
This fault can be more frequent during summer heatwaves or extreme winter cold when the inverter is under maximum load to maintain target temperatures.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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