Set Appliance State:

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

Observation:

Reset appliance as necessary.
Observe the diverter motor during the boiler's self check.
The diverter spindle should slowly move to its fully extended position and then move to its mid position.
Allow the boiler to complete its self check.
Turn on HW tap.
The spindle should now move to its fully retracted position.
If the spindle does not move correctly:
Isolate Mains Power to appliance as per TOP's P4
Remove diverter motor from its housing and place
in a safe location to observe its movement.
Repeat the test.