NV5LT/NV3.5LT TROUBLESHOOTING MANUAL
RESPONDING TO ALARMS
VERSION 3.3 2016-03-10
PAGE 4.1.37
Power Supply or LVPS Module Fault Validation
Each power supply and LVPS module has four LEDs on its front panel (see
, which can help
in identifying a fault and allowing you to determine whether remedial action is required now or later.
Figure 4.1.11: Power Supply Module LEDs
Record which power supply modules are displaying an alarm and the state of its LEDs (see below).
AC OK LED
Green (solid): Ac voltage is present and within acceptable limits.
Green (blinking): Ac voltage is present, but outside acceptable limits.
DC OK LED
Green (solid): Power supply is enabled and output regulated.
Green (blinking): Power supply is experiencing an over-current condition.
SERVICE LED
Amber (solid): Power supply is experiencing a high temperature condition.
FAULT LED
Red (solid): Module is experiencing and internal fault.
Red (blinking): Communication has been lost with the rack controller.
Other combinations of power supply module LEDs, and the corresponding power supply condition, are
listed in
Top of Power Supply Module
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