Troubleshooting, Possible cause, Solution

7.1Troubleshooting

PROBLEM:	UPS will not turn on

Possible cause:	UPS Enable switch is in the off position or the power
	on switch is not pressed.
Solution:	Turn on the rear panel UPS Enable switch. Press front-
	panel power on switch to energize UPS and loads.

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. 5.3). Inexpensive fuel powered
	generators can cause distorted line voltages—set
	Option Switch 1 to the on ( I ) 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 ( I )
	position (see Sec. 5.5).