IBM SAN512B-6 Installation, Service And User Manual page 105

Table 15. 2870 W AC Power supply LED descriptions
LED purpose
Power status
Color
No light (LED is off)
Steady green
Flashing on one-half
second, and then off
one-half second.
Flashing on two times, and
then off 5 seconds.
Flashing on three times,
and then off 5 seconds.
Flashing on four times, and
then off 5 seconds.
Status
Power supply does not
have incoming power and
is not providing power to
the device.
Note: When incoming
power is first removed,
LED flashes, and then turns
off.
Power supply has incoming
power and is providing
power to the device.
AC power is disconnected
from the power supply
assembly, but additional
power supply installed in
device is powered on.
48V is out of range.
12V is out of range.
AC input is under voltage.
Chapter 6. Monitoring the switch
Recommended action
Ensure that the power
supply is firmly seated,
power cable is connected,
and that power cable is
connected to power source.
Disconnect power cable
from power supply, remove
and reinsert power supply,
and then reconnect power
cable to restart.
If status persists, replace
power supply assembly.
No action required.
Check power connection at
power supply, cable, and
AC power source. If these
check out, disconnect
power cable from power
supply, remove and reinsert
power supply, and then
reconnect power cable to
restart. If status persists,
replace power supply
assembly.
Disconnect power cable
from power supply, remove
and reinsert power supply,
and then reconnect power
cable to restart. If status
persists, replace power
supply assembly. If status
persists, replace power
supply.
Disconnect power cable
from power supply, remove
and reinsert power supply,
and then reconnect power
cable to restart. If status
persists, replace power
supply assembly.
Verify voltage in power
distribution unit (PDU) or
system providing power to
power supply assembly.
Check cabling and voltage
between PDU and switch.
Correct the voltage as
necessary. If correct voltage
is verified, replace power
supply assembly.
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