Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Gain access to PCB (use Insulation Mat as required)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Confirm mains supply and earth to boiler are correct using a Socket and See.
Isolate as per TOPs P4
and refit as necessary