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 appliance if required (rotate selector switch to OFF position
for 2 seconds, then rotate back to DHW/CH position).
Allow boiler to commence its ignition sequence.
Measure for mains voltage across the brown and blue leads of connector X17.
Approximately 4 to 5 seconds after the fan has started is mains voltage
present for approximately 10 seconds?
Note.
Appliance may enter lockout during this test, reset as required until test is complete.
for 2 seconds, then rotate back to DHW/CH position).
Allow boiler to commence its ignition sequence.
Measure for mains voltage across the brown and blue leads of connector X17.
Approximately 4 to 5 seconds after the fan has started is mains voltage
present for approximately 10 seconds?
Note.
Appliance may enter lockout during this test, reset as required until test is complete.
Isolate as per TOPs P4
and refit as necessary