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Control Unit
CU4 AS-interface
Operating Manual: UK-0
Control Unit CU4 AS-interface UK-0 / 31.05.2010
UK
10. Disassembly
10.1.
Dismantling
Before disassembly, verify the following items:
•
The valve must be in safety position and must not be controlled!
•
Shut off air supply!
•
Cut off current to control unit, i.e. interrupt the supply voltage!
Solenoid valve (4, 5, 6)
+
Open the CU cover by turning in anticlockwise direction.
+
Release the plug connection at the electronic module for the
corresponding solenoid valve.
+
Release and remove the 2 screws
(20)
TX20.
+
Replace the solenoid valve.
+
Assembly in reverse order. See to a proper fit of the flat seal!
Electronic module (2)
Before releasing the cable connections make sure that all lines
are de-energised!
+
Open the CU cover by turning in anticlockwise direction.
+
Release the plug connection of the solenoid valves.
+
Release the cable from the terminal strip, all terminals 1-15.
+
Release and remove the 3 screws
(20
) TX20.
+
Replace the electronic module.
+
Assembly in reverse order.
Feedback unit
Before releasing the cable connections make sure that all lines
are de-energised!
+
Open the cover.
+
Release the cable for the Hall effect sensors from the terminal
strip, terminals 3-8.
+
Release the clamp ring and lift the CU4 from the adapter.
+
Remove the 4 screws
(9)
TX15 at the lower side of the
CU base
(1
).
+
Take out the feedback unit to the bottom.
Hall effect sensors
The Hall effect sensors can only be replaced at the dismantled
feedback unit.
+
Remove the 3 screws
(14)
TX10.
+
Remove the tower lid
(13
).
+
Remove the o-rings
(11)
.
+
Dismantle the sensors by turning of the adjusting screw
(12)
.
To simplify adjustment of feedbacks:
+
Mark the position of the sensor on the adjusting screw!
+
Assembly in reverse order.
+
Check the correct position of the Hall effect sensors and their
functions as described in
chapter 8
CU assembly and start-up.
Hall effect sensors
13
11
14
14
12