Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Remove electrical cover from pump
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Boiler ON/OFF Switch ON.
Measure for mains voltage across blue and
brown wires connected to the pump terminal block.
Replace pump electrical cover after test.
Measure for mains voltage across blue and
brown wires connected to the pump terminal block.
Replace pump electrical cover after test.
Isolate as per TOPs P4
and refit as necessary