Service Manual

333
6802800U74-AN
Chapter 11: Power Supply Unit
Figure 184: PSU Front Panel
11.2.1
PSU LED Indicators
The following table lists and describes the PSU LED indicators and Figure 184: PSU Front Panel on
page 333 shows their position.
Table 102: Power Supply Unit LED Indicators
LED Name Color Condition Indications
AC In Status (AC input
indicator)
DC In Status (DC input
and charging indicator)
dual color: LED
green/red
dual color LED:
green/red
AC input voltage is
present and within lim-
its
AC input voltage is not
present or below limits
DC operations only
mode
PSU is supplied from
DC input
battery is being charg-
ed
backup battery or a
DC source supplies
Green - solid
Red - solid
LED off or Orange
– solid
1
Green - solid
Green/red flashing
fast (2Hz)
Green/red flashing
slow (0.5Hz), shift-
POWER SUPPLY UNIT
FRONT VIEW
POWER SUPPLY
Power
AC In
AC In Status
DC In Status
DC Out / Temp
Pin 1
DC Out.
Pin 8
Fan 1
Status
Fan 2
Pin 7
Pin 814
Status
Fan 3
ATCC
DC Out
Status
Battery
Temp. Sens.
DC in
Battery
CAN 1
CAN 2