Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove rear control panel cover to expose main PCB
Disconnect controls interface connector marked H7 on the main PCB
Disconnect controls interface connector marked H7 on the main PCB
Measurement:
Test 1:
Measure resistance across the live (brown lead) and
neutral (blue lead) connection on the connector.
Test 2:
Measure resistance across the live (brown lead) and suitable Earth.
Expected resistance OL or greater than 1MOhm on both tests.
Measure resistance across the live (brown lead) and
neutral (blue lead) connection on the connector.
Test 2:
Measure resistance across the live (brown lead) and suitable Earth.
Expected resistance OL or greater than 1MOhm on both tests.
Isolate as per TOPs P4
and refit as necessary