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, no voltage wired, wireless or EMS BUS.
Observe the appliance rear terminal strip for 240v, no voltage or EMS BUS controls and the underside of the appliance to see if a wireless controls key is fitted.