BoilerFaultCodesWhat the manual says
Manufacturer manualInverter High Current
What causes this fault?
This fault occurs when the heat pump's internal electrical system detects a sudden surge or an unsustainably high flow of electricity. It is usually caused by a failing compressor that is struggling to turn or a fault within the electronic control board that manages power distribution. To prevent permanent damage to the wiring, the system automatically shuts down as a safety precaution.
This issue can be more frequent during extreme winter temperatures when the compressor has to work at its maximum intensity for long periods to extract heat from the cold outside air.
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 J11: no call-out fees, no surprise bills.
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