TROUBLESHOOTING
Eaton 9170+ UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality
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Table 23 contains descriptions of non-critical alarm messages.Non-critical alarms are not as urgent as critical alarms, but should beattended to as soon as convenient to avoid the problem becomingcritical.Table 23. Non-Critical Alarm Messages
Alarm Message What It Means What to Do
B Near Low Battery The battery voltage has reached the Near
Low Battery set point.
If the voltage increases, the alarm clears
automatically. If it drops further, it will cause a Low
Battery alarm.
D Low Runtime Batteries in the cabinet are nearly
discharged.
Perform an orderly shutdown of all equipment and
wait for AC input power to return. When AC input
power returns, the UPS begins recharging batteries
and automatically restarts.
O Check Memory The configuration as stored in the system
memory may have been corrupted.
Look for the slot number (third line on display) of the
failed module. Contact your service representative.
M Check Battery The batteries have failed an automatic
system test.
Contact your service representative.
M Check Battery
Open Cell
A battery (pair of modules) has failed an
open cell test.
Look for the slot number (third line on display) of the
failed modules. Verify that both battery modules are
properly installed. If properly installed, replace both
battery modules.
M Check Battery
Weak Battery
The system batteries have degraded to the
point where system runtime is less than
the designed rating.
Replace all battery modules.
U Low Redundancy The number of active power modules is
too low to provide the programmed
redundancy level to protect the current
load.
The unit is able to protect the equipment, but will
not be fault tolerant. To regain the desired
redundancy, either add power modules or reduce
the load.
U Low Redundancy
Insufficient
Batteries
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
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.