Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
CH Demand
Remove locking pin and release diverter motor
Note:
The diverter motor can be removed without the need for draining
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Observe the position of the diverter motor spindle.
Is it in the fully retracted position?