Checking/Replacing The Motor Of The 3-Way Valve - Worcester Greenstar 4000 Installation And Maintenance Instructions Manual

Replacement parts
Checking the flow turbine operation.
Refer to figure 88.
▶ Remove the clip [1].
▶ Pull out the flow turbine [2].
▶ Select in the Service menu> Info > DHW flow rate.
▶ Blow in the flow direction of the turbine [3].
▶ If nothing appears on the display, replace the turbine.
– Disconnect the electrical connection from the turbine and
reconnect to replacement turbine.
1
3
> 0 = 0
Fig. 88 Checking the flow turbine operation
9.5

Checking/replacing the motor of the 3-way valve

Variant without screws
Checking 3-way valve motor.
▶ Carry out function check of 3-way valve motor in Function check
menu.
– Service menu > Function check > Activate test
valve > Hot water.
Detaching the motor.
▶ Set the 3-way valve to mid position.
– Service menu > Settings > Special function > 3-WV mid. pos.>
Yes.
The 3-way valve remains at the middle position for approx. 15 minutes.
▶ Detach the motor in the sequence shown.
– Unplug the plug.
– Remove the lock clip.
– Turn the motor anti-clockwise and pull it up and out.
– Pull the motor up to disengage from ball head and remove.
1) When the Function Check menu is entered only Burner will be visible for the first
10 seconds, after this period of time the other components that can be tested
will appear in the menu. Components such as HC1 pump, DHW circulation pump
and Solar pump will show if connected to the control board.
66
2
Fig. 89 Detaching the motor from the 3-way valve (variant without
Installing the motor.
▶ Install the motor in the sequence shown.
– Align the motor with the ball head and push down to engage.
– Turn the motor clockwise as far as it will go.
0010035015-001
– Refit the lock clip.
– Connect the plug.
1)
> 3-way
Fig. 90 Installing the motor in the 3-way valve (variant without screws)
4.
1.
screws)
1.
1.
4.
Greenstar 4000 – 6 720 891 161 (2020/09)
2.
3.
0010036141-001
3.
2.
0010036140-001