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Maintenance
112
12.2 Routine Maintenance
Become thoroughly familiar with the equipment, but at no time 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 Emerson
®
Network Power Liebert
®
Services at 1-800-LIEBERT 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 maintain historical service records.
• Keep the UPS free of dust and any moisture.
• Keep the UPS cool:
• Battery systems must be kept in the range of 72-77°F (22-25°C) in order to meet design speci-
fications for capacity and longevity.
• The UPS will reliably meet all performance specifications at temperatures up to 104°F (40°C),
and can be slightly derated for operation at even higher temperatures. However, performance
and longevity will be optimized 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 12.2.5 - Torque
Requirements).
12.2.1 Record Log
Set up a maintenance log to record scheduled checks and any abnormal conditions.
The log should have space for all metered data 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.
12.2.2 Air Filters
The air filters must be inspected and serviced on a regular schedule. The period between inspections
will depend upon environmental conditions. Under normal conditions, the air filters will require
cleaning or replacement approximately every two months.
All Liebert APM models have replaceable filter elements behind the grille in the front of the unit.
This element can be changed with the UPS operating, by opening the outer door for access.
Abnormal or dusty conditions will require more frequent cleaning and replacement of air filters.
Inspect installations in new buildings more often, then extend the inspection period as experience
dictates.
12.2.3 Battery Maintenance
!
WARNING
Risk of electrical shock and arc flash. Can cause property damage, injury and death.
These maintenance procedures will expose hazardous live parts. Refer servicing to qualified
personnel.