Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Measurement:
Disconnect Reset Switch, Multi Connector and measure resistance across the two Orange wires from the Reset Switch.
The Multimeter should read Open Circuit until the Reset Button is actuated.
This will result in a Short Circuit reading on the Multimeter.
The Multimeter should read Open Circuit until the Reset Button is actuated.
This will result in a Short Circuit reading on the Multimeter.
Isolate as per TOPs P4
and refit as necessary