Set Appliance State:

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

Observation:

Allow the boiler to run until system starts to warm, then remove CH demand.
Does the pump overrun for approximately 3 minutes?
Pump CH overrun can be set between 3 and 30 minutes
but by default it is set to 3 minutes.
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