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7.0 Difficulty
7.1 Troubleshooting
PROBLEM: UPS will not turn on
Possible cause: UPS Enable switch is in the off ( O ) position.
Solution: Turn on the rear panel UPS Enable switch.
Possible cause: UPS’s circuit breaker is tripped (button is extended).
Solution: Reduce the UPS’s load by unplugging equipment and
reset the circuit breaker (press button on rear panel).
Possible cause: Very low utility voltage or dead outlet.
Solution: Check outlet with a table lamp. If very dim, have
utility voltage checked by an electrician.
PROBLEM: UPS operates on-battery even though normal line
voltage is thought to exist.
Possible cause: UPS’s circuit breaker is tripped (button is extended).
Solution: Unplug equipment to reduce the UPS’s load. Press the
button on the rear panel to reset circuit breaker.
Possible cause: Very high, low, or badly-distorted line voltage.
Solution: Test the input voltage with UPS’s line voltage bar
graph (see Sec. 5.2.1). Inexpensive fuel powered
generators can cause distorted line voltages—set
Option Switch 1 to the on (down) position.
PROBLEM: UPS “beeps” occasionally.
Possible cause: This is normal; the UPS is protecting your computer
equipment from momentary sags or swells.
PROBLEM: UPS beeps more than once or twice an hour.
Possible cause: Chronically high or distorted line voltage.
Solution: Set Option Switches 1 and 2 to match input voltage
range. Alternatively, set Option Switch 3 to the on
(down) position (see Sec. 5.4 and 5.5.4).
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