40
immediately, you may run them from the AC utility directly by turning the Transfer Switch counter-
clockwise to the ON BYPASS position. While in the ON BYPASS position, your loads are not protected
by the UPS and are subject to any outages or disturbances that may occur on the AC utility. You may
remain in the ON BYPASS position until the problem with the UPS is resolved.
7.1 FAULT MESSAGES ON THE BOTTOM LINE OF DISPLAY #1 or #2 SCREENS
If the UPS detects a problem that results in the UPS being unable to operate in a totally normal mode of
operation, a message will be flashed on and off at the bottom of the LCD display when displaying either
DISPLAY#1 or DISPLAY#2 screens. If multiple problems exist, the highest priority problem will be
displayed. This bottom line of the LCD display will be blank if no problems are detected. Table 5 lists
messages that may be observed and recommended action to be taken.
Table 5 Screen Messages flashed at bottom of Display #1 or #2
LCD Screen Message
Comments
Remedy
INVALID TABLE OF
CONSTANTS
Internal Problem
Call for service
INVALID CONFIGURATION
DATA
Internal Problem
Call for service
UPS NOT INITIALIZED
PROPERLY
Internal Problem
Call for service
DIAGNOSTIC ERROR EXISTS
Internal Problem
Call for service
UPS OFF DUE TO OVERLOAD
– TRY RESET
Your load pulled current that
exceeded the capabilities of
the UPS
Look at History Display for overloads to find the cause of
the overload. Correct the load that caused the problem.
Go to Reset Display and reset the overload
UPS OFF DUE TO OVERTEMP
– TRY RESET
Heat sink temperature
exceeded 75
°
C or Ambient
exceeded 65
°
C.
Look at History Display for overloads to find the cause of
the overload. Check current status of temperatures on
Display #2. If temperatures are OK, go to reset display and
reset the overtemperature. When UPS starts, determine if
all 3 fans are producing airflow. Call for service.
DC VOLTAGE IS TOO LOW TO
START UPS
DC voltage from batteries is
too low to operate.
Occurs normally when UPS is being shutdown.
DC VOLTAGE IS TOO HIGH
TO START UPS
Internal Problem
Call for service.
BATTERY AND DC VOLTAGE
DIFF IS TOO HIGH
Internal Inverter Capacitors
are not precharged yet
Occurs normally when UPS is turned on.
OFF DUE TO AC BOOTUP
COUNT – TRY RESET
UPS shut down due to
battery being exhausted.
Go to Reset Display and reset the AC Bootup count.
AC LINE OK BUT CANT
PHASELOCK TO IT
Internal Problem
Call for service.
AC LINE OK BUT CANT
RESET AC TRIP
Internal Problem
Call for service.
TRANSFER SWITCH IS IN
0FF-IDLE POSITION
Transfer switch has not yet
been moved to the ON UPS
position.
Turn switch clockwise to ON UPS position to start UPS.
INVALID SETUP DATA
Internal Problem
Call for service
UPS IS IN BATTERY TEST
MODE
Battery test is in progress
Normal display when a battery test has been requested via
the System Test Display.
AC LINE PROBLEM
Appears if a problem exists
with the AC line that
prevents the UPS from using
it.
Input status on Display #1 will show reason why AC line is
not useable. The problem is most likely due to a problem
in the utility feeding the UPS (e.g. power failure, open
feeder breaker, low or high line voltage).
AC LINE BACKFEED
DIAGNOSTIC
Internal Problem. In such a
case, the UPS will also trip
the AC breaker to prevent
backfeed to the utility.
Call for service.
INVERTER TRIP DIAGNOSTIC
Internal Problem
Call for service
