Audible Alarm Conditions; Troubleshooting Guide - Liebert UPS User Manual

CONDITION
Battery mode (utility failure)
Low battery
Output overload (bypass)
Over temperature (bypass)
DC Bus over voltage (bypass)
PFC failure (bypass)
Inverter failure
Battery Test failure
PROBLEM
UPS fails to start when
on button is pressed
Battery indicator is
illuminated
UPS has reduced
battery time

AUDIBLE ALARM CONDITIONS

TROUBLESHOOTING GUIDE

CAUSE
UPS is short circuited
or overloaded
Internal fuse is blown,
indicating internal fault
Breaker not closed or
has tripped.
UPS input not
connected
UPS input protection
has opened
Utility voltage out of
UPS input range.
Batteries not fully
charged
UPS is overloaded
Batteries may not be
able to hold a full
charge due to age
One short beep every ten seconds
Two short beeps every five seconds
One short beep every half second
One second beep every four seconds
One second beep every four seconds
One second beep every four seconds
One second beep every four seconds
Two second beep every minute
Ensure UPS is off. Disconnect
all loads and ensure nothing is
lodged in output terminal block.
Ensure loads are not defective
or shorted internally.
Do not attempt to open or
service the UPS. Contact your
dealer or technical support.
Close breaker or remove
overload.
UPS is operating from battery
mode, make certain UPS is
securely connected to source.
UPS is operating from battery
mode. Save data and close
applications. Replace UPS
input fuse or reset input
breaker, then restart UPS.
UPS is operating from battery
mode. Save data and close
applications. Ensure Utility
supply voltage is within
acceptable limits for UPS.
Apply input voltage for at least
24 hrs to recharge batteries.
Check load level display and
reduce load level
Replace batteries. Contact
your dealer or technical
support.
30
ALARM
SOLUTION