Set Appliance State:

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

Observation:

Test 1.
Apply a CH demand and allow to run for 1 minute, then remove CH demand.
Fan and pump should both overrun for approximately 2 minutes.
Test 2.
Apply a DHW demand and allow boiler to run for 1 minute, then remove DHW demand.
Fan and pump should both overrun for approximately 2 minutes.
Note.
Fan speed may vary during overrun operation.