APC Back-UPS 1250 User Manual download pdf (Page 35)

Page 33

7.0 Difficulty

7.2 Battery replacement check

You can expect to receive 3 to 6 years of service life from the UPS's batteries when

installed in a cool, dry location. Battery life is shortened when operated in an

environment where the ambient temperature is normally above 30°C (86°F).

The UPS automatically performs a battery test upon start up and, if left operating, every

14 days thereafter. This test actually loads the battery for a brief time and will detect a

weak battery before it is put into service during a power failure. If the battery is too weak

to support the load during this test, the UPS will instantly return to on-line operation.

The UPS will illuminate the Replace Battery indicator when it is detected that the

batteries can no longer sustain sufficient charge. This means that the UPS would be

unable to provide power for longer than half the normal interval (see section 9.9) during

an extended utility failure.

If the UPS illuminates the Replace Battery indicator, perform the following procedures

to be sure that the batteries need replacing.

7.2.1 Use the UPS's Line voltage bar graph to check that the utility voltage is within a

normal range. The UPS will charge the batteries at a slower rate when operated from

very low input voltages. Where low line voltages and frequent disturbances are

common, set the UPS's Option switch 1 to the on ( I ) position - see section 5.0.

7.2.2 Allow the UPS to charge the batteries for at least 8 hours following an extended

utility failure.

7.2.3 Recheck the UPS's batteries by conducting a battery test. Press the I/Test button

to initiate the battery test.

7.2.4 If the Replace Battery indicator does not illuminate following the battery test, the

batteries do not require replacement. Extended storage without recharge, or successive

power outages can cause false indications.

7.2.5 If the Replace Battery is illuminated following the battery test, the batteries are

worn and need to be replaced.

7.2.6 Call the Customer Service phone number given on the cover of this manual to

obtain information about battery replacement service or battery replacement kits.

Note: Please see the battery cautions at the beginning of this section.

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APC Back-UPS 1250 User Manual Page 35