Set Appliance State:

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

Observation:

Cancel purge cycle.
Access parameter B11
Click HERE for guidance on how to access the parameters.
Check parameter B03, this is the variable input switch and can change if the appliance experiences electrical supply fluctuations and can also be set incorrectly after a replacement PCB has been fitted.
If this parameter is set to 1 or 2 then fault code F50 can appear.
The correct parameter setting should be 0