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Control Unit
CU4 Direct Connect
Instruction Manual: UK-3
Control Unit CU4 Direct Connect UK-3 / 20.04.2011
UK
APV
10. Disassembly
10.1.
Demontage
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 10-15.
+ 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
