Set Appliance State:

Mains Power Off
CH Demand
Selector Switch in CH CONTINUOUS position
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Does Pump run?
Note:
Do not take noise or vibration as an indication of pump running.
There is an anti-cycling time delay for the CH demand this operates when the demand for central heating is interrupted. The delay period is between 1 and 3 minutes.