Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Turn Hot Water Tap On
Use Insulation Mat as required
Gain access to the PCB
Gain access to the PCB
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow the boiler to enter its ignition sequence while monitoring the voltage between X1 and X2 on the PCB.
Once the burner has lit approx. 100V DC or greater should be measured.
Once the burner has lit approx. 100V DC or greater should be measured.
Isolate as per TOPs P4
and refit as necessary