Set Appliance State:

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

Observation:

This appliance can be fitted with a variety of controls, 240v wired, wireless or EMS BUS.
Observe the appliance rear terminal strip for 240v or EMS BUS controls and the underside of the appliance to see if a wireless controls key is fitted.