Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Unplug the harness from the side of the pump and remove the pumps electrical cover
Measurement:
Test 1.
Measure the resistance between the L and N terminals of the pump.
Expected resistance approximately 160 Ohms.
Test 2.
Measure for resistance between the L and Earth terminals.
Expected resistance greater than 1 MOhm (or O.L).
Measure the resistance between the L and N terminals of the pump.
Expected resistance approximately 160 Ohms.
Test 2.
Measure for resistance between the L and Earth terminals.
Expected resistance greater than 1 MOhm (or O.L).
Isolate as per TOPs P4
and refit as necessary