Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect leads from terminals marked L and N in the section marked "PUMP" on the main terminal strip.
Measurement:
Test 1:
Measure resistance across the blue (pump neutral) and brown (pump live) leads that have been disconnected.
Resistance will vary by pump but should be above 80 Ohms.
Test 2:
Measure resistance across the disconnected blue lead (pump neutral) and earth.
Expected resistance open circuit.
Test 3:
Measure resistance from the disconnected brown lead (pump live) and earth.
Expected resistance open circuit.
Measure resistance across the blue (pump neutral) and brown (pump live) leads that have been disconnected.
Resistance will vary by pump but should be above 80 Ohms.
Test 2:
Measure resistance across the disconnected blue lead (pump neutral) and earth.
Expected resistance open circuit.
Test 3:
Measure resistance from the disconnected brown lead (pump live) and earth.
Expected resistance open circuit.
Isolate as per TOPs P4
and refit as necessary