User's Guide Power Supply 9170
Troubleshooting
86
Powerware
®
9170 User's Guide LTM-1344 B Uncontrolled Copy
Alarm Reason Codes
Some alarms have a reason code as well as the alarm code. These reason
codes may help you to interpret and isolate the cause of an alarm.
Table 20 contains a listing of all reason codes along with the associated
alarm codes. It also gives an interpretation of the reason, and a
suggested corrective action.
Table 20. Alarm Reason Codes
Alarm Code and
Reason Code
What it Means What to Do
M Check Battery
Open Cell
(Reason code 4)
A battery (pair of modules) has failed
an open cell test.
Look in the alarm log for the slot number of the failed
modules. Verify that both battery modules are properly
installed. If properly installed, replace both battery
modules.
M Check Battery
Weak Battery
(Reason code 5)
The system batteries have degraded
to the point where system runtime is
less than the designed rating.
Replace all battery modules.
T Call Service
Phase Error
(Reason code 6)
The UPS has detected the input
phase rotation to be incompatible
with its output wiring and will not
start up.
Correct the input wiring problem and restart the UPS.
T Call Service
Module Failure
(Reason code 7)
A power module has detected an
internal fault and has shut down.
Look in the alarm log for the slot number of the power
module and replace the defective module.
T Call Service
Excessive Transfers
(Reason code 8)
The UPS has detected an excessively
high number of automatic transfers
from High Efficiency mode, and has
switched to Double Conversion (Auto)
mode.
Contact your service representative.
T Call Service
Precharge Failure
(Reason code 9)
A power module has detected an
initialization sequence problem and
will not start up.
Look in the alarm log for the slot number of the affected
module. Contact your service representative.
U Low Redundancy
Insufficient Batteries
(Reason code 10)
The UPS load exceeds 2800 watts per
battery string. The system will protect
the load during short power outages,
but battery degradation or damage
may result.
Reduce the load or install additional battery modules (two
modules per string).
U Low Redundancy
Insufficient Modules
(Reason code 11)
The number of active power modules
is too few to provide the programmed
redundancy level while protecting the
load. The UPS will protect the load,
but will not be fault tolerant.
Reduce the load or install additional power modules.