Set Appliance State:

Mains Power Off
CH Demand
CH Selector in Maximum position
ON/OFF Switch in ON position
Summer/Winter in Winter Position (IN)
Timer Set to ON Position
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Allow boiler to fire and start to heat the system.
Remove demand via external controls.
Does the Pump continue to run and to dissipate the heat from the boiler?
Note:
The Pump should continue to run for approximately 3 minutes.