Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove connector X2 from the PCB
Measurement:
Test 1:
Measure the resistance between the outer two brown and blue wires on connector X2
Expect a resistance of 1 MOhm or greater.
(O.L is acceptable because this is greater than 1MOhm)
Test 2:
Measure the resistance between one of the outer wires (it does not matter which) to a suitable earth.
Expect a resistance of 1 MOhm or greater.
(O.L is acceptable because this is greater than 1MOhm)
Are the resistances measured as expected?
Measure the resistance between the outer two brown and blue wires on connector X2
Expect a resistance of 1 MOhm or greater.
(O.L is acceptable because this is greater than 1MOhm)
Test 2:
Measure the resistance between one of the outer wires (it does not matter which) to a suitable earth.
Expect a resistance of 1 MOhm or greater.
(O.L is acceptable because this is greater than 1MOhm)
Are the resistances measured as expected?
Isolate as per TOPs P4
and refit as necessary