Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Gain access to PCB (use Insulation Mat as required)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset the boiler / cancel purge cycle as necessary.
Allow ignition sequence to commence.
Measure for mains voltage across pins 1 and 2 on connector CN2 during the sparking stage of the ignition cycle.
Note:
Number 1 for each mains voltage connector is indicated on the PCB with the numbering running right to left.
Allow ignition sequence to commence.
Measure for mains voltage across pins 1 and 2 on connector CN2 during the sparking stage of the ignition cycle.
Note:
Number 1 for each mains voltage connector is indicated on the PCB with the numbering running right to left.
Isolate as per TOPs P4
and refit as necessary