Maintenance; Service; Replacing The Cu 3X2; Replacing The Cim Module - Grundfos CU 3 Serie Instrucciones De Instalación Y Funcionamiento

Group Terminal Designation
9 USB port
70
71 Relay 1
72
73
10
74
Relay 2
75
* GND is isolated from other earth connections.

11. Maintenance

The CU 3X2 is maintenance-free during normal use
and operation. It should be cleaned with a wet cloth.

12. Service

The CU 3X2 cannot be serviced. It must be replaced
if faulty. See section 13. Replacing the CU

13. Replacing the CU 3X2

1. Switch off the power supply to the CU 3X2.
2. Switch off the power supply to components with
external supply.
3. Mark the individual conductors with the numbers
of the corresponding terminals.
4. Disconnect all conductors.
5. Remove the CU 3X2 from the panel/cabinet.
6. Fit the new unit as described in section
5. Mechanical installation.
7. Connect all conductors according to markings.
8. Configure the new CU 3X2 by means of a PC
Tool. See service instructions for the product in
question.

13.1 Replacing the CIM module

See also section 6.3 Fitting the CIM
1. Switch off the power supply to the CU 3X2.
2. Switch off the power supply to components with
external supply.
3. Mark the individual conductors with the numbers
of the corresponding terminals.
4. Remove the screws that holds the CIM module.
5. Remove the CIM module from the CU 3X2.
6. Fit the new CIM module.
7. Connect the CIM module as described in the
installation and operating instructions supplied
with the CIM module.
Data
USB 2.0, type B
C
NO
NC
C
NO
NC

14. Dimensions

3X2.
Fig. 18

15. Disposal

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
module.
waste disposal authorities. The separate collection
and recycling of such products will help protect the
environment and human health.
Diagram
70
71
72
73
74
75
Dimensional sketch
The crossed-out wheelie bin symbol on
a product means that it must be
disposed of separately from household
waste. When a product marked with this
symbol reaches its end of life, take it to a
collection point designated by the local
15