Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Set selector switch to ch/dhw
Dhw temperature control to max
Dhw temperature control to max
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Allow ignition to commence.
As burner ignites, measure for AC voltage across white (rectification voltage) connector CN6 and blue (neutral) connector CN1.
Expected voltage between 88 - 92 VAC.
Note.
This voltage will be present for approx 5 seconds whilst burner is a light, reset boiler as required till test complete.
As burner ignites, measure for AC voltage across white (rectification voltage) connector CN6 and blue (neutral) connector CN1.
Expected voltage between 88 - 92 VAC.
Note.
This voltage will be present for approx 5 seconds whilst burner is a light, reset boiler as required till test complete.
Isolate as per TOPs P4
and refit as necessary