Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Boiler mains switch ON
Remove diverter valve connector from diverter valve
Remove diverter valve connector from diverter valve
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow the ignition sequence to commence and burner to ignite.
Measure the voltage across the purple and red leads at the diverter valve connector at the PCB.
Measure the voltage across the purple and red leads at the diverter valve connector at the PCB.
Isolate as per TOPs P4
and refit as necessary