Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Measurement:
Unplug full sequence cable from display board (L/H cable).
Attach crocodile clip probe of multimeter to pin 5 of PCB.
Place other multimeter probe on Pin 2 of PCB.
Check for open circuit.
Press Lockout reset button and hold in reading should now be short circuit.
Release Lockout reset button reading should now be open circuit.
Attach crocodile clip probe of multimeter to pin 5 of PCB.
Place other multimeter probe on Pin 2 of PCB.
Check for open circuit.
Press Lockout reset button and hold in reading should now be short circuit.
Release Lockout reset button reading should now be open circuit.
Isolate as per TOPs P4
and refit as necessary