Carrier UC Open XP, Installation And Startup Manual, Page: 30 / 44

Troubleshooting
26 UC Open XP/UC Open XP IO
If you have problems mounting, wiring, or addressing the UC Open XP or the UC Open XP IO, contact Carrier
Technical Support.
Communication LED's
The LED’s indicate if the controller is speaking to the devices on the network. The LED’s should reflect
communication traffic based on the baud rate set. The higher the baud rate the more solid the LED’s
become.
LEDs Status
Power Lights when power is being supplied to the expander.
NOTE The UC Open XP is protected by internal solid state Polyswitches on the
incoming power and network connections. These Polyswitches are not replaceable,
but they will reset themselves if the condition that caused the fault returns to
normal.
Rx Lights when the controller receives data from the network segment; there is an Rx
LED for Ports 1 and 2.
Tx Lights when the controller transits data from the network segment; there is an Rx
LED for Ports 1 and 2.
Run Lights based on controller health.
Error Lights based on controller health.
The
Run and Error LED's indicate controller and network status.
If Run LED shows... And Error LED shows... Status is...
2 flashes per second Off Normal
2 flashes per second 2 flashes,
alternating with Run LED
Five minute auto-restart delay
after system error
2 flashes per second 3 flashes,
then off
The controller has just been
formatted
Alternating flashes with the
Error LED
Alternating flashes with the Run
LED
The controller files have been
archived
2 flashes per second On Two or more devices on this
network have the same MS/TP
network address
2 flashes per second 1 flash per second The controller is alone on the
network
Troubleshooting