Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Selector switch to hot water
DHW Temperature selector to maximum
Use insulation mat as required
DHW Temperature selector to maximum
Use insulation mat as required
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Allow fan to run.
Measure AC voltage across the black and blue wires at connector J2 on the ignition pcb.
Measure AC voltage across the black and blue wires at connector J2 on the ignition pcb.
Isolate as per TOPs P4
and refit as necessary