8.2 CIM 500 BACnet IP
You can detect faults in CIM 500 by observing the status of the two communication LEDs. See the table below.
8.2.1 LED status
CIM 500 connected to an LC 2XX.
Fault (LED status) Possible cause Remedy
LED1 and LED2 remain off when the power supply
is connected.
CIM 500 is fitted incorrectly in the Grundfos product. Check that CIM 500 is fitted and connected correctly.
CIM 500 is defective. Replace CIM 500.
LED2 for internal communication is flashing red.
No internal communication between CIM 500 and
the Grundfos product.
Check that CIM 500 is fitted correctly in the
Grundfos product.
LED2 for internal communication is permanently red.
CIM 500 does not support the Grundfos product
connected.
Contact the nearest Grundfos company.
BACnet LED1 is permanently red. Fault in the CIM 500 BACnet IP configuration.
Check that the rotary switch SW1 is set to 2.
Check that BACnet IP address configuration is
correct.
LED1 is permanently red and green at the same
time.
Error in firmware download. Use the webserver to download the firmware again.
LED2 is permanently red and green at the same
time.
Memory fault. Replace CIM 500.
Related information
A.1.2. How to configure an IP address on your PC using Windows
10
8.2.2 CIM 500 BACnet IP communication faults
Fault Possible cause Remedy
The slave does not respond to telegrams. Configuration or wiring error.
• Check the visual diagnostics on the BACnet
slave. Normal conditions are that the Grundfos
GENIbus LED (LED2) is permanently green and
that the BACnet IP LED (LED1) is off or flashing
green.
• Make sure that the cable between the BACnet IP
master and the BACnet slave is connected
correctly.
• Ensure that the slave IP address is configured
correctly, and that the correct slave IP address is
used in the BACnet master poll.
The slave returns data value 0xFFFF (65535).
The value is unavailable. A data value of 0xFFFF
does not necessarily indicate an error condition. It
means that the value is unavailable from the
controller.
See section Device Object for available data.
The product is not configured to show the value or
lacks a sensor to read the value.
See section Analog inputs for data values that
require a sensor.
Related information
3.1 Connecting the Ethernet cable
3.3 Setting the IP addresses
5.6 Analog inputs
8.2.1 LED status
22
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