Set Appliance State:

WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Enter the appliance parameter setting mode, click here for a guide on how to do this.
Check parameter 2-2-8, this is the appliance version setting, this can be set incorrectly after fitting a brand new PCB.
On this appliance the parameter 2-2-8 should be set to 0, if it is set to a different value it should be changed to 0.
Once the parameter has been set correctly exit the parameter setting mode.
The display should now have returned to show standby mode.