Troubleshooting
UC Open
CARRIER CORPORATION ©2019
Installation and Start-up Guide
All rights reserved
20
If Run LED shows...
And Error LED shows...
Status is...
2 flashes per second
On
Exec halted after frequent system errors, due to:
•
Controller halted
•
Program memory corrupted
•
One or more programs stopped
5 flashes per second
On
Exec start-up aborted, Boot is running
5 flashes per second
Off
Firmware transfer in progress, Boot is running
7 flashes per second
7 flashes per second,
alternating with
Run
LED
Ten second recovery period after brownout
14 flashes per second
14 flashes per second,
alternating with
Run
LED
Brownout
On
On
Failure. Try the following solutions:
•
Turn the UC Open off, then on.
•
Download memory to the UC Open.
•
Replace the UC Open.
NOTE
If you resolve the issue but the
Error
LED does not turn off, cycle power to the controller.
Serial number
If you need the UC Open's serial number when troubleshooting, the number is on a sticker on the back of the main
controller board.
To restore defaults
CAUTION
This erases all archived information and user-configuration settings. You will have to reconfigure
all custom settings. It is recommended to restore the factory defaults only under the guidance of Carrier Control
Systems Support.
To erase volatile memory data and restore factory default configuration settings:
1
Turn off the UC Open's power switch.
2
Put the
Factory Defaults
jumper on.
3
Turn on the UC Open's power switch.
4
Remove the
Factory Defaults
jumper.
