B-1

Troubleshooting

B

Troubleshooting Problems

This appendix describes possible causes and solutions for the following problems:
1. Unit will not turn on.
2. Connected equipment reboots or turns off during or after the unit switches to
battery power.
3. “Replace Battery” LED is illuminated.

Note:The VFD screen will display any faults or warning conditions that occur
along with a message explaining what action to take. If ever in doubt as to
what action to take, please contact APC Technical Support (Internet—
www.apc.com/support, Phone — 888-88-APCAV).

Unit will not turn on.

Possible Cause:

Battery is not connected

Solution:

Remove front display panel by grasping the sides and pulling straight
back. Battery is located on the right side of the unit. The black battery connector
should be pushed snugly into the battery socket located just to the left of the battery
pack. See “

Connect Battery

” to view photographs of this procedure.

Possible Cause:

Input power cord is not connected properly.

Solution:

Ensure supplied power cord is connected firmly on both ends.

Possible Cause:

No power or insufficient power available at the wall outlet.

Solution:

Ensure the wall outlet has good power by using a voltmeter or by plugging
in another device.

Note:The unit will not turn on and accept incoming utility power if the power is
out of range. The unit can still be “cold-started” using battery power, by
pressing and holding the power switch until the unit beeps.