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4.4 DIAGNOSING PROBLEMS
The three front panel lights along with the LCD display will indicate any problems that exist in the UPS.
When the transfer switch is first turned from the OFF to the OFF IDLE position, the lights will all be lit as
a lamp test. This lamp test will last for 10 seconds unless the transfer switch is rotated, prior to this
time-out period, to the ON UPS position, in which case the lights will start operating normally. If you
remain in the OFF IDLE position more than 10 seconds, the lights will change to flashing in unison,
indicating the UPS output is off.
When the UPS is operating normally, the green AC LINE light will be lit and the other yellow and red
lights will be off. If the utility is lost, the green AC LINE light will go off and the yellow BATTERY
DISCHARGING light will come on indicating energy is being drawn from the batteries to supply the
UPS electronics and the load. After this condition has existed for 10 seconds, the audible alarm will
start to beep to warn the operator that the batteries are being discharged. The audible alarm can be
silenced by pressing the ALARM RESET key on the keypad.
