Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect both leads running from the POC sensor
Measurement:
Test 1:
Check for continuity (zero resistance) between the ends of the black wires at the disconnected plugs.
Test 2:
Check for continuity (zero resistance) between the white and red wire at the disconnected plugs.
Check for continuity (zero resistance) between the ends of the black wires at the disconnected plugs.
Test 2:
Check for continuity (zero resistance) between the white and red wire at the disconnected plugs.
Isolate as per TOPs P4
and refit as necessary