APV_CU4plus_AS-interface_UK-3_062019.indd
UK
Control Unit
CU4plus AS-interface
Instruction Manual UK-3
APV
54
8. CU Assembly and Startup
8.5.
Replacement of CU3 versions
Replacement of a standard CU3 AS-i
All CU41 variants can substitute a CU3 control unit without
changing the signal routing. When replacing the CU3, the larger
dimensions of the CU4 control unit must, however, be considered.
If a CU43 is to replace a CU33 control unit, the change of the seat
lifting signals must be observed.
The following table shows the details.
AS-interface
output data bit
CU33
CU43
DO0
main valve
main valve
DO1
lower seat lifting
upper seat lifting
DO2
upper seat lifting
lower seat lifting
In order to prevent the activation of the wrong seat lift after CU
replacement, the following adaptions can be carried out:
- Change in the control software. – or -
- The interchange of the electrical connections of the pneumatic
valves 2 and 3 at the electronic module of CU43. In this case, the
signals of CU43 as well as of CU33 can be controlled.
Note!
The air hoses leading to the actuators MUST NOT be
exchanged.
For the lower seat lift, the CU is equipped with a
separate exhaust air channel due to the larger volume of the
actuator. A mix-up of the air hoses can lead to disruption in
operation.
Replacement of a standard CU33 AS-i SLD
Adjust the compatibility mode with the ToolBox software.
The CU43plus AS-i will work in the same manner as the CU33 AS-i
SLD.
