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Troubleshooting
If you have problems mounting, wiring, or addressing the RTU Open, contact Carrier Control Systems Support.
NOTE To help you troubleshoot, obtain a Module Status (Modstat) from the controller and review the System Error
and Warning details.
Communication LED's
The LED's on the RTU Open show the status of certain functions. Verify the LED patterns by cycling power to the
controller and noting the lights and flashes.
If this LED is on...
Power
Rx
Tx
DO#
The Run and Error LED's indicate controller and network status.
If Run LED shows...
2 flashes per second
2 flashes per second
2 flashes per second
2 flashes per second
5 flashes per second
7 flashes per second
14 flashes per second
On
RTU Open v3
Installation and Start-up Guide
Status is...
The RTU Open has power.
The RTU Open is receiving data from the network segment
The RTU Open is transmitting data over the network segment
The binary output is active
And Error LED shows...
Off
2 flashes,
alternating with Run LED
3 flashes, then off
On
Off
7 flashes per second,
alternating with Run LED
14 flashes per second,
alternating with Run LED
On
59
Status is..
Normal
Five minute auto-restart delay after system error
The controller has just been formatted
Exec halted after frequent system errors or
control programs halted
Firmware transfer in progress, Boot is running
Ten second recovery period after brownout
Brownout
Failure. Try the following solutions:
•
Turn the RTU Open off, then on.
•
Format the RTU Open.
•
Download memory to the RTU Open.
•
Replace the RTU Open.
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Troubleshooting
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