Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Remove connector CN2 from the PCB and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset the appliance if required.
(Press reset button once then release)
Allow the fan to run and the ignition sequence to commence.
Measure for mains voltage between pin 1 on connector CN2 (where the gas valve connector was fitted) on the main PCB to connector N (blue) on the mains terminal block.
Expect mains voltage.
Note.
Mains voltage should be present for approximately 5 seconds, this will then be present again after approximately 25 seconds. This will be repeated 3 times before lockout occurs, reset as required until test is complete.
(Press reset button once then release)
Allow the fan to run and the ignition sequence to commence.
Measure for mains voltage between pin 1 on connector CN2 (where the gas valve connector was fitted) on the main PCB to connector N (blue) on the mains terminal block.
Expect mains voltage.
Note.
Mains voltage should be present for approximately 5 seconds, this will then be present again after approximately 25 seconds. This will be repeated 3 times before lockout occurs, reset as required until test is complete.
Isolate as per TOPs P4
and refit as necessary