Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
CH Demand
Gain access to PCB (use Insulation Mat as required)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset boiler if required.
Allow ignition sequence to commence.
Measure the voltage at connector CN1 connection 8 (brown wire) on the ignition PCB to a suitable neutral.
Approximately 8 seconds after the fan starts mains voltage should be present for 3 to 5 seconds. This should repeat 5 times before boiler locks out, with approximately 5 seconds between attempts.
Allow ignition sequence to commence.
Measure the voltage at connector CN1 connection 8 (brown wire) on the ignition PCB to a suitable neutral.
Approximately 8 seconds after the fan starts mains voltage should be present for 3 to 5 seconds. This should repeat 5 times before boiler locks out, with approximately 5 seconds between attempts.
Isolate as per TOPs P4
and refit as necessary