Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Remove connector J4 from the PCB and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Does the boiler still try and fire or does it now enter standby?
Isolate as per TOPs P4
and refit as necessary