Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
CH Demand
DHW Selector in Minimum (-) position
CH Selector in Maximum (+) position
ON/OFF Switch in ON position
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Allow the boiler to run until system is approximately 60 deg C.
Remove CH Demand
Does the pump continue to run for approximately 2½ to 3½ minutes?