Chapter 2
Controls, Ports, and Indicators
Rear Panel
25
Power Supply Status LEDs
Each 200-240 VAC power supply unit has three status LEDs located on the power supply rear side. Consolidated status of all
power supplies is reported by the front control panel by the power status LED.
Figure 2-9 Power Supply Status LED
Table 2-7 Power Supply Status LED
Power
LED-Green
Predict Fail
LED-Amber
Fail
LED-Amber
Status
Off Off Off No AC power applied to all PSUs.
Off Off On No AC power applied to this PSU only.
Blinking Off Off AC present/standby outputs on.
On Off Off PSU DC outputs on and OK.
Off Off On Power supply failure.
On Blinking Off Predictive failure—PSU about to fail because of poorly performing
fan.
On Off Blinking Current limit on 48 VDC output.
Predict Fail
LED-Amber
Power LED-Green
Fail LED-Amber
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