Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Remove the EMS BUS connector from the PCB (light red)
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Has the fault code cleared now the EMS BUS controls have been disconnected?
If the code has not cleared reset the appliance by pressing the up and down arrows simultaneously for 3 seconds.
Has the fault code cleared?