Grundfos CIM 300 - Fault Finding the Product; CIM 300 Bacnet MS;TP

8. Fault finding the product
8.1 CIM 300 BACnet MS/TP
8.1.1 LED status
Faults in a CIM 300 can be detected by observing the status of the
two communication LEDs. See the table below.
Fault (LED status) Possible cause Remedy
LED1 and LED2 remain off when the
power supply is connected, and 5
seconds have passed.
CIM 300 is defective. Replace CIM 300.
LED2 for internal communication is
flashing red.
No internal communication between CIM 300 and the
Grundfos pump.
• Check that the individual conductors are fitted correctly.
• Check the power supply to the pump.
LED2 for internal communication is
permanently red.
CIM 300 does not support the connected pump. Contact the nearest Grundfos company.
BACnet LED1 is permanently red. Fault in the CIM 300 BACnet configuration.
• Ensure that the BACnet MAC address has a valid setting.
• Ensure that the Device Object Instance Number is within
the allowed range.
BACnet LED1 is flashing red.
Fault in the BACnet communication (cyclic redundancy
check).
• Check the transmission speed, switches SW4 and SW5.
See section Setting the BACnet transmission speed.
• Check the cable connection between CIM 300 and the
BACnet network.
• Check the termination resistor settings, switches SW1 and
SW2.
Related information
2.4 Setting the BACnet transmission speed
2.5 Selecting the Device Object Instance Number
2.7 Selecting the BACnet MAC address
2.8 Termination resistor
8.1.2 BACnet faults
Fault Possible cause Remedy
CIM 300 does not communicate on the
BACnet MS/TP network.
Configuration or wiring fault.
Ensure that the cable between the BACnet MS/TP devices is
connected correctly.
Ensure that the BACnet MAC address and Device Object
Instance Number are configured correctly and are unique on
the network.
Ensure that the transmission speed is configured correctly.
Ensure that each end of the BACnet MS/TP trunk cable is
terminated, if necessary.
Ensure that the bus topology for a BACnet MS/TP network is
correct.
CIM 300 is instructed to not communicate on the
BACnet network via the DeviceCommunicationControl
service.
Use the DeviceCommunicationControl service to enable
communication from the device.
Related information
2.3 Connecting to the BACnet network
2.4 Setting the BACnet transmission speed
2.5 Selecting the Device Object Instance Number
2.7 Selecting the BACnet MAC address
2.8 Termination resistor
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English (GB)