HP Surestore Disk Array 12h - And FC60 Service Manual page 279

Table 37 Master Troubleshooting Controller Enclosure Master Troubleshooting Table (cont'd)
Symptom
"Battery Low" error
issued by software
BBU is new but will not
hold a charge
Loss of battery backup
during a power outage
Power Supply Module
No power to the
controller module (all
Power LEDs off)
One Power Supply LED
(FRU) is ON and the
other is off
Possible Cause
Power turned OFF for
extended period and
drained battery power.
Batteries are weak and
FRU is due for
replacement.
Battery charger board
failure
Faulty battery harness
Battery failure or BBU is
missing.
Power switches are turned
off.
Power cords unplugged.
Power supply modules
overheated or failed.
A Power supply module is
turned OFF or
unplugged.
B Power supply module is
overheated or failed.
Procedure
Turn ON the power and allow controller
module to run 7 hours to recharge the
batteries.
If after 7 hours, the battery low error
persists, replace the BBU.
Check the last service date for the BBU. If it
has been two years since the battery was
replaced, replace the BBU.
Replace the BBU. Allow the system to run
for at least 7 hours in order to properly
charge the batteries. If this does not solve
the problem, go to cause B.
Replace both power supplies.
Replace the battery harness.
Replace the BBU.
Turn ON both power switches on the
controller enclosure.
Turn ON the main circuit breakers in the
rack, if applicable.
Make sure all power cords are plugged in
securely.
Lower the room temperature if it is too high,
unblock enclosure vents if they are
obstructed, replace any failed fans in the
enclosure, or replace the power supply
module.
Plug in the power cord and turn ON the
power switch. If the LED remains off, go to
cause B.
Lower the room temperature if it is too high,
unblock enclosure vents if they are
obstructed, replace any failed fans in the
enclosure, or replace the power supply
module.
Controller Enclosure Troubleshooting
279