43
LCD OVERLOAD Alarm
Message
Comments Remedy
LOAD CURRENT OVERLOAD
One or more of the 3 output
phases or the neutral is
presently being overloaded.
Remove the load causing the problem.
UNDER VOLTAGE OVERLOAD Internal Problem
Call for service
INVERTER CURRENT TRIP
OVERLOAD
Internal Problem
Call for service
OVER-TEMPERATURE
OVERLOAD
Either the heat sink
temperature exceeded 75
°
C
or the control board
temperature exceeded 65
°
C.
Check to make sure all 3 fans at top of UPS are
exhausting air.
POWER IMBALANCE
OVERLOAD
Internal Problem
Call for service.
LCD DIAGNOSTIC Alarm
Message
Comments Remedy
DC LINK/BATTERY PROBLEM
See “PROBLEM WITH DC
LINK OR BATTERY”
SHUTDOWN
SHORTED AC SWITCH
UPS detected a possible
backfeed problem to the
utility. As a precaution, UPS
tripped its AC breaker.
Perform a Diagnostic/Warning reset on the “System
Resets” LCD screen to clear diagnostic. Reset AC breaker
by pulling it all the way to the off position then turning it on.
If diagnostic reappears (and AC breaker trips again), an
internal problem exists that requires service. In such a
case, the UPS will not be able to use the AC line and will
only run until the batteries are exhausted. You must either
perform an uninterrupted transfer to ON BYPASS so that
your load can continue to run from the raw utility or shut off
your loads in an orderly manner before the battery energy
is exhausted. If resetting the diagnostic works, monitor
system closely and call for service.
LOW LOAD VOLTAGE, NO
HIGH LOAD CURRENTS
Internal Problem
Call for service
POWER IMBALANCE
UPS detected a problem
with one or more of its
internal current sensors.
Perform a Diagnostic/Warning reset on the “System
Resets” LCD screen to clear diagnostic. If diagnostic
reappears, an internal problem exists that requires service.
In such a case, the UPS will not be able to use the AC line
and will only run until the batteries are exhausted. You
must either perform an uninterrupted transfer to ON
BYPASS so that your load can continue to run from the
raw utility or shut off your loads in an orderly manner
before the battery energy is exhausted. If resetting the
diagnostic works, monitor system closely and call for
service.
OPEN AC SWITCH
UPS did not detect enough
current coming in from one
of the utility lines, so it has
determined that it can no
longer use the utility.
Perform a Diagnostic/Warning reset on the “System
Resets” LCD screen to clear diagnostic. If diagnostic
reappears, an internal problem exists that requires service.
In such a case, the UPS will not be able to use the AC line
and will only run until the batteries are exhausted. You
must either perform an uninterrupted transfer to ON
BYPASS so that your load can continue to run from the
raw utility or shut off your loads in an orderly manner
before the battery energy is exhausted. If resetting the
diagnostic works, monitor system closely and call for
service.
INV CURRENT TRIPS, NO
HIGH LOAD CURRENTS
Internal Problem
Call for service
CURRENT TRIP OCCURRED
DURING STARTUP
Internal Problem
Call for service
EPROM CHECKSUM ERROR
Internal Problem
Call for service
