BoilerFaultCodesWhat the manual says
Manufacturer manualInverter Error
What causes this fault?
This fault occurs when the internal power management system fails to supply the correct electricity to the compressor motor. It is usually triggered by a short circuit or a failed component on the inverter circuit board that prevents the heat pump from physically starting its heating cycle.
This fault can be more frequent during periods of high demand in winter, as the inverter has to work harder and generate more heat to maintain high flow 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.
Avoid the next call-out bill
A cover plan would handle faults like L31: no call-out fees, no surprise bills.
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