Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Gain access to controller interface PCB

Observation:

Is the wiring configuration as per the photo opposite?
1. Live and Neutral present at the 'enable' terminals.
2. Bridge wire (link) present at the 'OT' terminals.
3. Bridge wire (link) present at the 'BL' terminals.