Chapter 6: LED Descriptions
LEDs for 56-Drive Expansion Chassis
QX and QXS Setup Guide
185
Power Supply LEDs
Power redundancy is achieved through two independent load-sharing power supplies. In the event of a
power supply failure, or the failure of the power source, the storage system can operate continuously on a
single power supply. Greater redundancy can be achieved by connecting the power supplies to separate
circuits. See Figure 131 below for power supply LEDs and description.
Figure 131:
LEDs: Power supply units — rear panel
1
2
3
4
LED No./Description
Color
State
Definition
1 — AC Input Source
Green
On
Power is on and input voltage is normal.
Off
No AC input to power supply.
2 — Voltage/Fan
Fault/Service Required
Amber
On
Blinking
Output voltage is out of range, or a fan is operating below
the minimum required RPM.
Off
Fault not detected.
3 — DC Power
Green
On
Main output power on.
Off
Power is off; main output is off; or a fault is detected.
4 — Power supply switch
NA
NA
NA
Table 60:
Power supply LEDs
