118
Rev. 8.0
A26361-K863-Z102-8-7619
Power Supply Unit (PSU)
The Power Supply Concept
There are three LED indicators (figure 76) on the front of the power supply unit
for PSU status monitoring.
Figure 76: Power supply unit: LEDs
*
When Fan #1 becomes fail, PSU is shut down.
When either Fan #2 or Fan #3 becomes fail, PSU is kept to work.
**
The blinking LED can be reset only by power ON/power OFF and/or through
plugging out the power supply cable.
Power supply condition
1
AC indicator
(green LED)
2
Fan failure
indicator
(green LED)
3
PSU status
indicator
(green LED)
AC present/only standby
outputs ON
ON
OFF
OFF
Power supply DC outputs
ON and OK
ON
ON
ON
Fan failure alert *
ON
blinks**
ON
Current limit
ON
ON
OFF
Alert # or Fan # shutdown
ON
blinks**
OFF
