Fault Finding; Led Status; Bacnet Faults - Grundfos CIU 300 Functional Profile And User Manual

9. Fault finding

9.1 LED status

Faults in a CIM/CIU 300 can be detected by observing the status of the two communication LEDs. See the table below.
Fault (LED status)
1. Both LEDs (LED1 and LED2) remain
off when the power supply is
connected, and 5 seconds have
passed.
2. The LED for internal
communication (LED2) is flashing
red.
3. The LED for internal
communication (LED2) is constantly
red.
4. The BACnet LED (LED1) is
constantly red.
5. The BACnet LED (LED1) is flashing
red.

9.2 BACnet faults

Fault
1. The CIM/CIU 300 does not
communicate on the BACnet MS/TP
network.
2. The booster does not react to
control commands from the bus.
3. There are only a few BACnet
objects available, and the GENIbus
LED flashes red.
Possible cause
a) The CIM 300 is defective.
a) No internal communication
between the CIM/CIU 300 and the
Grundfos booster.
a) The CIU 300 does not support the
connected booster.
a) Fault in the CIM 300 BACnet
configuration.
a) Fault in the BACnet communication
(cyclic redundancy check).
Possible cause
a) Configuration or wiring fault.
b) The CIM/CIU 300 is instructed to
not communicate on the BACnet
network via the
DeviceCommunicationControl
service.
a) The booster is running in local
mode.
a) There is no communication
between the CIM 300 and the
booster.
Remedy
Replace the CIM 300.
• Check the cable connection between the booster
and the CIU 300.
• Check that the individual conductors have been
fitted correctly.
• Check the power supply to the booster.
Contact the nearest Grundfos company.
• Ensure that the BACnet MAC address has a valid
setting.
3.7 Selecting the BACnet MAC address
See section
• Ensure that the Device Object Instance Number is
within the allowed range.
3.5 Selecting the Device Object Instance
See section
Number .
• Check the transmission speed
(switches SW4 and SW5).
See section 3.4 Setting the BACnet transmission
speed
.
• Check the cable connection between the CIM 300
and the BACnet network.
• Check the termination resistor settings (switches
SW1 and SW2).
3.8 Termination resistor
See section
Remedy
Ensure that the cable between the BACnet MS/TP
devices is connected correctly.
3.3 Connecting to the BACnet network
See section
Ensure that the BACnet MAC address and Device Object
Instance Number are configured correctly and are
unique on the network.
3.7 Selecting the BACnet MAC address
See section
3.5 Selecting the Device Object Instance Number
address selection.
Ensure that the transmission speed is configured
correctly.
3.4 Setting the BACnet transmission speed
See section
Ensure that each end of the BACnet MS/TP
trunk cable is terminated, if necessary.
3.8 Termination resistor
See section
of the Grundfos CIM/CIU 300.
Ensure that the bus topology for
a BACnet MS/TP network is correct.
Use the Device Communication Control service to
enable communication from the device.
• Set the booster to bus control by setting the
Present_Value of BO, 0 to 1.
• Set bus control on the CU 351display (settings/
secondary functions/control source, and select
"controlled from bus").
Ensure that the GENIbus cable between the CIM 300
and the booster is connected correctly.
Ensure that the booster is switched on and able to
communicate on GENIbus.
.
.
.
and
for
.
for line termination
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