Section 300: Preventive Maintenance; 301 Preventive Maintenance Check; 302 Battery Monitor Test - Best Power UNITY/I UT310 Manual Del Usuario

SECTION 300: PREVENTIVE MAINTENANCE

BEST recommends a periodic preventive maintenance check every six months. BEST also
recommends that the cooling fans and batteries be replaced every three years.

301 Preventive Maintenance Check

At the preventive maintenance check, a qualified service technician should:
• Check all wiring connections.
• Inspect and clean the unit.
• Check the batteries.
• Check the AC and DC meter functions.
• Perform a battery capacity or battery monitor test. (See Sections 302 and 303.)
• Check all modes of operation.
• Perform a power outage test.
Safety precautions must be observed while performing maintenance checks. For more information
on preventative maintenance checks, or to schedule a maintenance check with a BEST authorized
field service representative, call BEST's Worldwide Service or the nearest BEST office.

302 Battery Monitor Test

IMPORTANT:
The battery monitor is standard for UT310-UT330 models with internal batteries and optional for
UT310-UT3220 models with external batteries. The steps on the next page tell you how to start a
battery monitor test. This test calculates the condition of the batteries and compares it to data
programmed in the unit. The test discharges the batteries to about 75% of their capacity. During
this test, the unit checks the applied load and the ambient temperature of the batteries. The unit then
compares the results of the test with its programmed data. If the unit determines that the condition
of the batteries is acceptable, it returns to normal operation. If the test determines that the condition
of the batteries is unacceptable, the unit starts either a "Battery monitor warning" alarm or a
"Battery monitor alarm." See Table 4 (page 14) for more information on these alarms. If you would
like the unit to automatically perform a battery monitor test on a regular basis (default = every 90
days), phone the nearest BEST office for more information.
Note: The information programmed into the unit is based on the size and type of batteries that
were installed when the unit was sold. If the battery configuration changes, this test will not
be accurate for the new configuration. Phone the nearest BEST office for more information.
If you are using UPS contacts for a communication link, take the
necessary precautions so this test will not cause a premature shutdown.
See your software documentation for more information.
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