Chapter 7 Checking LEDs 7-3
FIGURE 7-2 Chassis Ear LEDs and Reset Button on Front Panel
TABLE 7-2 lists the front panel LEDs and describes LED activity.
TABLE 7-2 Front Panel LEDs
LED LED Color Description
Drive Solid green Good: Drive power-up and spin-up OK.
Blinking green Good: Indicates drive activity.
Solid amber Failed: Drive failure.
Power (Light bulb icon)
Monitors the DC output voltage
within tolerance specification.
Overcurrent protection shutting
down any voltage output is also
displayed.
Voltage thresholds:
+5 VDC +/–.25 VDC
+12 VDC +/–.6 VDC
Current thresholds:
+5 VDC 35A
+12 VDC 25A
Solid green Good: Power supply good.
Solid amber Failed: One or more output voltages out-of-
range.
Fan (Fan icon)
Monitors the fan speed within
nominal operational RPM
specification of 5000 RPM.
Solid green Good: Both fans are rotating at 4000 RPM or
higher.
Solid amber Faulty/Failed: One or both fans are rotating at
less than 4000 RPM.
Temp (Thermometer icon)
Monitors the temperature level
and indicates violations of the
internal temperature threshold of
55C.
Solid green Good: Under temperature threshold.
Solid amber Failed: Over temperature threshold.
Power
Fan
Temp
Event
Reset push button
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