Hot Swapping Power Supplies; Determining Power Supply Status - HP server rx4610 Service Manual

Chapter 6

Hot Swapping Power Supplies

In a fully configured system, the power system contains four 800-watt autoranging power supplies. The third
bay's power supply serves a redundancy function for the server's power supply requirements.
CAUTION
NOTE

Determining Power Supply Status

When the amber power supply failure LED on the front of the chassis turns on, determine which power
supply is defective by checking the three status LEDs on each supply. Each power supply has three LEDs
that both indicate whether power is supplied to the power supply and the health of the power supply. The
LEDs are ordered top to bottom on each power supply. Table 6-1 illustrates the states indicated by the three
LEDs.
Table 6-1. Power Supply LEDs
Power
Supply
Status
No AC power to any
power supplies
No AC power to a
specific power supply
AC present / Standby
output on
DC outputs on and
Because of chassis airflow disruption, the power supply bay should not be vacant for
more than five minutes when server power is on. Exceeding the five-minute limit
might cause system cooling to fall below the minimum required level and possibly
cause damage to system components.
If you have only three supplies installed, they must occupy the first, second, and
fourth power supply bays as you face the chassis. Figure 26 shows the power
supply installation order.
3
1
Figure 26. Power Supply Installation Order
PWR
(Green)
(Top Position) (Middle Position)
Off
Off
Blinking
On
2
4
If only 3 power supplies
are operational, place a
filler panel over the fourth
bay in the installation order.
PFAIL
(Amber)
(Bottom Position)
Off
Off
Off
Off
Replacing Parts
FAIL
(Amber)
Off
On
Off
Off
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