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Chapter 1
Overview
Controls, Ports, and LEDs
29
Figure 1-8 show the power supply status LEDs.
Figure 1-8 Power Supply Status LED
Table 1-4 lists power supply status LED information.
Table 1-4 Power Supply Status LED
Power LED
(Green)
Predict Fail
LED (Amber)
Fail LED
(Amber)
Status
Off Off Off No ac power is applied to all PSUs.
Off Off On No ac power is applied to this PSU only.
Blinking Off Off ac present and the standby outputs are on.
On Off Off PSU dc outputs are on and OK.
Off Off On Power supply failure.
On Blinking Off Predictive failure. The PSU is about to fail because of a
poorly performing fan.
On Off Blinking Current limit on 48 VDC output.
Predict Fail
LED (Amber)
Power LED (Green)
Fail LED (Amber)