Maintenance
125
Liebert
®
APM
™
12.3.2 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. The
Liebert APM air filters are washable and reusable. Two sets of air filters are are shipped with the
Liebert APM.
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.
12.3.3 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.