0 difficulty – APC 600 User Manual

Page 34

7.1 T

7.1 Trrrrroubleshooting

oubleshooting

(continued)

PROBLEM:

UPS does not provide expected back up time.

Possible cause:

UPS’s battery is weak from recent outage or wear.

Solution:

The battery needs recharging after an extended
outage. The battery wears faster when put into service
often and when used at higher temperatures.

Possible cause:

UPS is overloaded.

Solution:

Check load using UPS’s output power bar graph (see
Sec. 5.2). Unplug non-critical equipment and printers.

PROBLEM:

Indicators on front panel flash in a “marquee” fashion.

Possible cause:

UPS has been shut down by computer software.

Solution:

UPS will restart when AC power returns.

PROBLEM:

All indicators are lit and UPS emits constant tone.

Possible cause:

Internal UPS fault.

Solution:

Do not attempt to use UPS. Turn off UPS and have it
serviced immediately.

PROBLEM:

Site wiring fault light is lit—UPS operates normally.

Possible cause:

Building wiring error such as missing ground or hot-
neutral reversal.

Solution:

A qualified electrician should be summoned to correct
the building wiring.

PROBLEM:

Replace Battery indicator is lit.

Possible cause:

Weak battery.

Solution:

Allow the battery to recharge for at least 8 hours. If
the problem persists after recharging, the battery
should be replaced.

7.0 Difficulty