Set Appliance State:

Mains Power Off
DHW Selector in Maximum (+) position
CH Selector in Minimum (-) position
ON/OFF Switch in ON position
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

The appliance will attempt the self check sequence.
The fan runs for approx. 9 seconds
The pump runs after a delay of 4 seconds for approx. 25 seconds.