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Troubleshooting
No communication
Possible cause
Power loss
Signal obstruction
One of the devices is outside of radio range
Incorrect power-up sequence
Slow communication
Possible cause
Duplicate unit controller BACnet Device IDs.
Replacing a Failed WCI
Task 1: Remove the failed WCI
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
1. Remove power from the controller that has the failed WCI wired to it.
2. Remove the WCI cover by firmly pressing the thumb tab at the bottom of the cover and pulling
3. Detach the 4-connector screw terminal block on the wiring harness from the receptacle on the
Task 2: Install the new WCI
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
New member (non-coordinator) WCI
1. Set (or verify if pre-addressed) the rotary address switches on the new WCI.
2. Attach the terminal block on the wiring harness to the receptacle on the new WCI and route the
3. Restore power to the controller that the WCI is installed on. UseTracerTU to open the network
26
If power loss causes communication to be lost, the coordinator WCI will re-initiate the
network as soon as power is returned.
If an obstruction causes communication to be lost, the coordinator WCI will re-initiate
the network as soon as communication is regained.
Move network components to within radio range or break up networks to make smaller
networks so that all components are within radio range. Alternatively, you can add a
repeater to extend the radio range.
Cycle power on the controller or Tracer SC connected to the WCI.
Make sure that every device on the network has a unique BACnet Device ID. Refer to
the current version of BAS-SVX51, BACnet MS/TP Wiring and Link Performance Best
Practices and Troubleshooting Guide.
the cover away from the back plate.
Note: If present, remove the security screw before removing the cover.
WCI and remove the WCI.
wires as before (through either the back plate or the bottom exit port).
(Tools > Wireless > Open Network) or press the OPEN NET button for 5 seconds when
connected to the coordinator, or a WCI that is already a member of the network.The new WCI
should find the network and join it.
Explanation/Resolution
Explanation/Resolution
WARNING
WARNING
BAS-SVX40B-EN
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