© National Instruments
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2-13
You can use the four main LEDs to determine the chassis operating status quickly. Table 2-2
describes the behavior of these LEDs.
Table 2-2.
Main Chassis LED Behavior
LED
State
Description
Temperature
Status
Off
Chassis is powered off.
Steady green
Air intake temperature is within chassis operating
range.
Blinking red
Air intake temperature is outside of chassis operating
range.
Steady red
Air intake or exhaust temperature has reached critical
limits.
Fan Status
Off
Chassis is powered off.
Steady green
All chassis fans are enabled and operating normally.
Blinking red
One or more chassis fans have failed, but chassis can
continue to operate.
Steady red
One or more chassis fans have failed, and chassis must
shut itself down.
Power Supply 1
Status
Off
Power supply is not installed or is in standby.
Steady green
Power supply is active, and all voltages are within
normal operating ranges.
Blinking red
Power supply is active, and at least one voltage is out
of range.
Steady red
Power supply has failed.
Power Supply 2
Status
Off
Power supply is not installed or is in standby.
Steady green
Power supply is active, and all voltages are within
normal operating ranges.
Blinking red
Power supply is active, and at least one voltage is out
of range.
Steady red
Power supply has failed.