Set Appliance State:

Mains Power Off
Ensure No demands are present
Ensure boiler is cool
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Reset boiler.
Allow the boiler to commence self check mode.
Can the condensate pump be heard to run?
Note.
Condensate pump may stop after approximately 20 seconds,
repeat test from set state as required.