Troubleshooting
30MP Multi-chiller CARRIER CORPORATION ©2018
Installation and Start-up Guide All rights reserved
27
If you have problems mounting, wiring, or addressing the controller, contact Carrier Control Systems Support.
To help you troubleshoot, obtain a Module Status (Modstat) from the controller and review the System Error
and Warning details.
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.
Verify the LED patterns by cycling power to the controller and noting the lights and flashes.
Power Lights when power is being supplied to the controller.
The controller 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 transmits 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
and
LED's indicate controller and network status.
1 flash per second 1 flash per second, alternating
with the
LED
The controller files are archiving. Archive is
complete when
LED stops flashing.
2 flashes per second Off Normal
2 flashes per second 2 flashes,
alternating with
LED
Five minute auto-restart delay after system error
2 flashes per second 3 flashes,
then off
The controller has just been formatted
2 flashes per second 4 flashes, then pause Two or more devices on this network have the
same network address
2 flashes per second 1 flash per second The controller is alone on the network
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