Set Appliance State:

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

Observation:

Enter the status code display mode on the appliance.
(press and hold the + button for 7 seconds)
The status code, appliance temperature and system pressure will cycle in the display.
Status code S34 signifies the appliance is running in frost protection mode rather than receiving a demand from external controls.
Is status code S34 shown in the display?
Note:
To exit status code mode press mode button once.