Service Manual

334
6802800U74-AN
Chapter 11: Power Supply Unit
LED Name Color Condition Indications
DC Out / Temp. (DC
output and temperature
indicator)
Fan # Status (Fan indi-
cator # near fan con-
nector #)
dual color LED:
green/red
dual color LED:
green/red
the PSU and the
source voltage drops
below 43VDC ±3%
No source connected
to DC input or the DC
voltage is below 40,5V
AC operations only
mode
DC output voltages are
present and within lim-
its
One or more of the
output voltages failed
Over temperature is
detected, 5 -10 C be-
fore shutdown
PSU is in standby
mode
Fan # programmed to
operate and Fan #
connected, operating
and fan failure signal is
high
Fan # connected but
programmed not to op-
erate or Fan # voltage
is out of limits or the
fan failure signal is low
Fan # not connected
and programmed not
to operate
Fan # not connected,
at start up, but should
have been as per CAN
command
ing between red
and green
Red - solid
LED off or Orange
– solid
1
Green - solid
Red - solid
Red - flashes
LED off
Green - solid
Red - solid
No light
Red - flashing
LED indication in boot mode (firmware update through CAN)
Upper 3 LEDs (AC In
Status, DC In Status
and DC Out/ Temp.)
3 dual color
LEDs: green/red
only boot loader is run-
ning (meaning that the
boot loader waits for
an .exe file)
boot loader is loading
a new hex file: (loading
status)
3 LEDs blinking to-
gether: R (red) R R
-> G (green) G G,
with 1 Hz frequen-
cy
R R G -> R G R->
G R R->... (circulat-
ing green LED)
1
in kits GMPN4227A and earlier