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Maintenance 109
4.3 Routine Maintenance
You are encouraged to become thoroughly familiar with the equipment, but at no time should you go beyond the
specific procedures in this manual while performing maintenance or correcting a malfunction. If you have any
doubt as to what must be done, call Liebert Global Services at 1-800-543-2378 for further instructions.
The UPS is designed for unattended operation, but does require some common sense maintenance.
• Keep good records.
Troubleshooting is easier if you have historical background.
•Keepitclean.
Maintain the UPS free of dust and any moisture.
• Keep it cool.
Battery systems must be kept in the range of 72-77°F (22-26°C) in order to meet design specifications for
capacity and longevity.
The UPS will reliably meet all performance specifications at temperatures up to 104°F (40°C), and can be
slightly aerated for operation at even higher temperatures. However, performance and longevity will be opti-
mized when the UPS is operated at the same temperature as the batteries.
• Keep connections tight.
Tighten all connections at installation and at least annually thereafter. (See torque requirements, Table 4.)
4.3.1 Record Log
Set up a maintenance log to record scheduled checks and any abnormal conditions.
The log should have space for all metered parameter indications including phase readings, alarm messages, UPS
mode of operation, air filter replacement date, and observation notes. A second log should be maintained for the
battery module as directed by the battery manufacturer.
A periodic walk-through inspection of the UPS and battery rooms is advised to check for visible and audible
indications of problems. Log the inspection, metered parameter indications, and any discrepancies.
4.3.2 Air Filters
A schedule for inspection of the air filters is required. The period between inspections will depend upon environ-
mental conditions. Under normal conditions, the air filters will require service or replacement approximately
every two months.
All T-UPS models have replaceable filter elements built into the full-width grille across the front of the unit. This
element can be changed from the front, with the UPS operating.
Series 600T models rated 300 kVA and higher also have recyclable filters built into the front of their base assem-
blies. These metal filter elements can be removed, washed in water, dried and returned to service.
Abnormal or dusty conditions will require more frequent cleaning and replacement of air filters. Inspect installa-
tions in new buildings more often, then extend the inspection period as experience dictates.
CAUTION
Be certain recyclable filter elements are dry before reinstalling them in the UPS.