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directly from the utility (see section 4.2). If not able to transfer to bypass, shut down all of your loads in
an orderly manner, then perform an interrupted transfer to Bypass by turning the Transfer Switch
counter-clockwise through the OFF IDLE and OFF positions to the ON BYPASS position. You may now
power up your loads to operate from the utility directly. Note that in the ON BYPASS position, any utility
power outage will shut down your critical load. Once transferred to ON BYPASS, call for service.
A WARNING alarm is not as critical as a DIAGNOSTIC alarm. The UPS will continue to operate while a
WARNING alarm exists; however, the problem should be corrected as the UPS may eventually shut
down due to the problem either continuing or worsening. If the condition causing the WARNING alarm
disappears, the WARNING alarm will also disappear, unlike a DIAGNOSTIC alarm.
Table 6 Shutdown, Overload, Diagnostic, and Warning Alarms
LCD SHUTDOWN Alarm
Message
Comments Remedy
PROBLEM WITH DC LINK OR
BATTERY
DC voltage to inverter
dropped dramatically when
current was drawn from
batteries. Most probable
cause is bad batteries. May
also be displayed if DC
breaker on UPS is shut off
prior to Transfer Switch
being turned off.
If UPS was turned off by shutting off DC breaker before
turning Transfer Switch to the off position, ignore. If this is
not the case, turn off the DC breaker and call for service. If
the load needs to be powered while waiting for service,
rotate the TRANSFER SWITCH counter-clockwise to the
ON BYPASS position to power the load directly from the
utility.
CURRENT TRIP OCCURRED
DURING STARTUP
Internal Problem
Call for service
PHASELOCK PROBLEM
DURING LOW BATT START
Internal Problem
Call for service
TRANSFER SWITCH WAS
TURNED OFF
Transfer Switch was turned
to the OFF IDLE or OFF
position.
This is a normal power-down message.
BATTERY WAS DISCHARGED
UPS ran without utility until
batteries were exhausted.
Wait for utility to return. Once the utility returns, an “AC
boot-up count” reset on the “System Resets” screen may
be needed.
EXTERNAL SHUTDOWN
REQUEST
An external piece of
equipment commanded the
UPS to shut down (and turn
off its breakers) by shorting
pins 1&2 of the “Custom I/O”
connector.
This is a normal UPS operation.
AC SHORT FOUND DURING
STARTUP
Internal Problem
Call for service
CURRENT OVERLOAD
One or more of the output
phases was overloaded.
Review overload history information to determine the
cause, then remove the load causing the overload.
Perform an overload reset on the “System Resets” LCD
screen to restart UPS.
OVER-TEMPERATURE
Either the heat sink
temperature exceeded 75
°
C
or the control board
temperature exceeded 65
°
C
for more than 1 minute..
Review overload history information to determine the
cause. Check Display#2 for present temperatures to see if
they have declined. Check to make sure exhaust air is not
blocked at top of unit. If all is OK, perform an over-
temperature reset on the “System Resets” LCD screen to
restart UPS. Check to make sure all 3 fans are exhausting
air at top of UPS. Call for service.
LOW OUTPUT VOLTAGE
WITHOUT AN OVERLOAD
Internal Problem
Call for service
POWER IMBALANCE
Internal Problem
Call for service
