Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Disconnect connector X9 from the PCB and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Does the pump still run or boiler attempt for fire or does it now go to standby correctly.
Isolate as per TOPs P4
and refit as necessary