Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
DHW temperature control to maximum
CH temperature control to minimum
DHW temperature control to maximum
CH temperature control to minimum
Remove plastic cover from the PCB
Use insulation mat as required
Use insulation mat as required
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Allow the fan to run and the ignition sequence to commence.
Check for mains voltage at connector M10 on the PCB across the red and yellow leads
Check for mains voltage at connector M10 on the PCB across the red and yellow leads
Isolate as per TOPs P4
and refit as necessary