Set Appliance State:
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Isolate Mains Power to appliance as per TOPs P4
Remove the main control box cover to expose the control PCB
Use insulation mat as necessary
Remove the main control box cover to expose the control PCB
Use insulation mat as necessary
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset lockout as necessary.
Allow fan to run.
Measure voltage across connection 2 (brown lead) and connection 1 (blue lead) on connector marked CON 12 on the control PCB.
Note:
Voltage will only be present for approximately 3 seconds if burner does not prove.
Allow fan to run.
Measure voltage across connection 2 (brown lead) and connection 1 (blue lead) on connector marked CON 12 on the control PCB.
Note:
Voltage will only be present for approximately 3 seconds if burner does not prove.
Isolate as per TOPs P4
and refit as necessary