Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Remove the cover from the pump
Run hot water tap at flow rate of 3 l/min
Run hot water tap at flow rate of 3 l/min
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the voltage between the Brown at the pump and the neutral at the incoming mains terminal strip.
Expected voltage 240 vac.
Expected voltage 240 vac.
Isolate as per TOPs P4
and refit as necessary