Set Appliance State:
Gas Off
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Use Insulation Mat as required
Disconnect spark generator harness from PCB
Remove plastic covers from the rear of the Control Box
Apply demand
Disconnect spark generator harness from PCB
Remove plastic covers from the rear of the Control Box
Apply demand
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
If required reset boiler, turn CH / DHW control to reset position.
Measure voltage across spark generator connection as indicated on rear of PCB, and the neutral connection on the mains supply.
Allow ignition sequence to commence.
Expect approximately 50 volts AC for about 10 seconds before the appliance goes into lockout.
Measure voltage across spark generator connection as indicated on rear of PCB, and the neutral connection on the mains supply.
Allow ignition sequence to commence.
Expect approximately 50 volts AC for about 10 seconds before the appliance goes into lockout.
Isolate as per TOPs P4
and refit as necessary