Set Appliance State:

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

Observation:

Allow the burner to ignite and run with a CH demand for 1 minute.
Remove the CH demand.
Does the pump continue to run for approximately 5 minutes.
Does the pump overrun operate as expected ?
Please choose from one of the options below:
PUMP OVERRUN OPERATES AS EXPECTED
PUMP OVERRUN DOES NOT OPERATE AS EXPECTED
CLICK HERE for guidance on how to access and adjust the Diagnostic codes.
Alternatively refer to Adapt for guidance.