Set Appliance State:

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

Observation:

Allow the boiler to run for CH for at least 1 minute.
Remove CH demand.
Does the pump overrun after demand has ended for approximately 1 minute? (see note 2.)
Note:
1. To reduce the heating time some radiators can be turned off.
2. 1 minute is default overrun time, it can be adjusted from 0 to 15 minutes via parameter 8 on the PCB, if pump does not overrun for 1 minute check this parameter before selecting option. Refer to ADAPT for more information.