Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Gain access to PCB (use Insulation Mat as required)

Observation:

Is the appliance wired with 24v or 240v external controls?
Note:
1. 240v controls will be wired into connector X1 (purple connector) on the main PCB.

2. If 24v controls are fitted they will be wired into the white section of connector X100.