Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Ensure thermal store is up to temperature
Temporarily link terminals A and B of the chronotherm control (this will require the removal of the chronotherm unit from the back plate).
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Does the diverter valve move to the CH position?
Note: Valve is in CH position when actuator lever is fully towards the valve body.
Note: This test requires the temporary linking of terminals A and B on the chronotherm unit. This link must be safely removed when the test is complete