National Instruments NI cRIO-9039 User Manual page 18

STATUS LED Indicators
The following table describes the STATUS LED indicators.
LED LED Pattern
Color
Yellow Blinks twice and
Blinks three times
and pauses
Blinks four times
and pauses
Continuously
On momentarily
Red Continuously
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Table 17. STATUS LED Indicators
The cRIO-9039 is in safe mode. Software is not installed,
pauses which is the factory default state, or software has been
improperly installed on the cRIO-9039.
An error can occur when an attempt to upgrade the software
is interrupted. Reinstall software on the cRIO-9039. Refer
to the Measurement & Automation Explorer (MAX) Help for
information about installing software on the cRIO-9039.
The cRIO-9039 is in user-directed safe mode, or the
cRIO-9039 is in install mode to indicate that software is
currently being installed.
This pattern may also indicate that the user has forced the
cRIO-9039 to boot into safe mode by pressing the reset
button for longer than five seconds or by enabling safe
mode in MAX. Refer to the Measurement & Automation
Explorer (MAX) Help for information about safe mode.
The cRIO-9039 is in safe mode. The software has crashed
twice without rebooting or cycling power between crashes.
The cRIO-9039 has not booted into NI Linux Real-Time.
blinks The cRIO-9039 either booted into an unsupported operating
system, was interrupted during the boot process, or detected
an unrecoverable software error.
The cRIO-9039 is booting. No action required.
This indicates a hardware error. An internal power supply
blinks has failed. Check front-panel I/O and C Series module
connections for shorts. Remove any shorts and cycle power
the cRIO-9039. If the problem persists, contact NI.
Off The cRIO-9039 is in run mode. Software is installed and the
operating system is running.
Indication
NI cRIO-9039 User Manual | © National Instruments | 17