Isolate Mains Power to appliance as per TOPs P4
Observation:
Turn ON the Hot Water tap.
Does the Diverter Valve spindle operate the DHW micro switches?
Turn OFF the Hot Water tap.
Does the Diverter Valve spindle release the DHW micro switches and fully retreat back inside the valve?
NOTE:
The Diverter Valve Spindle must retreat fully back into the Diverter Valve and must not protrude from the Diverter Valve when at rest.
Does the Diverter Valve spindle operate the DHW micro switches?
Turn OFF the Hot Water tap.
Does the Diverter Valve spindle release the DHW micro switches and fully retreat back inside the valve?
NOTE:
The Diverter Valve Spindle must retreat fully back into the Diverter Valve and must not protrude from the Diverter Valve when at rest.