Grundfos CIM 500

6.2 Modbus TCP or BACnet IP
You can detect faults in a module by observing the
status of the two status LEDs.
The prerequisite is that CIM 500 is fitted in a
Grundfos product or in a CIU 500.
Ensure that SW1 is in position "1" if
Modbus should be selected or in position
"2" if BACnet should be selected.
Related information
4. Status LEDs
6.2.1 Both LEDs remain off
Both LEDs remain off when the power supply is connected.
Cause Remedy
The module is fitted incorrectly in the Grundfos
product.
• Check that the module is fitted and connected
correctly
.
The module is defective. • Replace the module.
CIU 500 is defective. • Replace CIU 500.
6.2.2 LED2 is flashing red
Cause Remedy
No internal communication between the module and
the Grundfos product.
• Check that the module is fitted correctly in the
Grundfos product.
No internal communication between CIU 500 and the
Grundfos product.
• Check the cable connection between the Grundfos
product and CIU 500.
•
Check that the individual conductors are connected
correctly, for example, not reversed.
• Check the power supply to the Grundfos product.
6.2.3 LED2 is permanently red
Cause Remedy
The module does not support the connected
Grundfos product.
• Contact the nearest Grundfos company.
6.2.4 LED1 is permanently red
Cause Remedy
Fault in the Modbus configuration of the module. • Check that SW1 is set to "1".
•
Check that the Modbus IP address configuration is
correct.
Fault in the BACnet configuration of the module. • Check that SW1 is set to "2".
•
Check that the BACnet IP address and UDP port
number configuration is correct.
Related information
A.1. W
ebserver configuration
6.2.5 LED1 is permanently red and green at the same time
Cause Remedy
Error in firmware download. • Use the webserver to download the firmware again.
Related information
A.1. W
ebserver configuration
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