Set Appliance State:
Set Multimeter to DC Volts 
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the DC voltage between pin 12 on connector X5 and the earth on the incoming mains supply.
Expect approximately 6.7 vdc.
Is the voltage measured as expected?
Expect approximately 6.7 vdc.
Is the voltage measured as expected?
Isolate as per TOPs P4
and refit as necessary