Instruction Manual

1. Power supply LEDs
Figure 32 Locations and Colors of Power Supply LEDs
.
Table 46 describes how to interpret LED activity that you might see.
Table 46 Explanation of Power Supply LED States
Possible States and ExplanationsRepresentsLED Color
• Solid on — power supply AC input is
above minimum requirements to oper-
ate
• Solid off — power supply AC input is
below minimum requirements to operate
AC OKGreen (top LED)
Solid on — power supply output voltage
is within specifications
• Solid off — power supply’s output
voltage is outside of specifications
DC OKGreen (middle LED)
• Solid on — indicates any of the follow-
ing conditions:
• Power supply output is outside of
specifications
• Current limit has been exceeded
• Temperature limit has been ex-
ceeded
• AC input is below minimum operat-
ing voltage
• PDU is on, but the Power button on
the library’s indicator panel is off
• Fan failed while AC input is present
and above minimum operating
voltage
• Solid off — no faults are detected
FaultBlue (bottom LED)
Troubleshooting your Library242