Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Gain access to PCB (use Insulation Mat as required)
Disconnect connector X6 from the PCB
Disconnect connector X6 from the PCB
Measurement:
Measure the resistance between the blue wires on X6, marked 12.1 and 12.2.
The resistance should conform approximately to the table below:
The resistance should conform approximately to the table below:
Isolate as per TOPs P4
and refit as necessary