Fault Finding The Product; Cim 300 Bacnet Ms/Tp - Grundfos CIM 300 User Manual

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)
LED1 and LED2 remain off when the
power supply is connected, and 5
seconds have passed.
LED2 for internal communication is
flashing red.
LED2 for internal communication is
permanently red.
BACnet LED1 is permanently red.
BACnet LED1 is flashing red.
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
CIM 300 does not communicate on the
BACnet MS/TP network.
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
Possible cause
CIM 300 is defective.
No internal communication between CIM 300 and the
Grundfos pump.
CIM 300 does not support the connected pump.
Fault in the CIM 300 BACnet configuration.
Fault in the BACnet communication (cyclic redundancy
check).
Possible cause
Configuration or wiring fault.
CIM 300 is instructed to not communicate on the
BACnet network via the DeviceCommunicationControl
service.
Remedy
Replace CIM 300.
• Check that the individual conductors are fitted correctly.
• Check the power supply to the pump.
Contact the nearest Grundfos company.
• Ensure that the BACnet MAC address has a valid setting.
• Ensure that the Device Object Instance Number is within
the allowed range.
• Check the transmission speed, switches SW4 and SW5.
See section Setting the BACnet transmission
• Check the cable connection between CIM 300 and the
BACnet network.
• Check the termination resistor settings, switches SW1 and
SW2.
Remedy
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.
Use the DeviceCommunicationControl service to enable
communication from the device.
speed.
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