7 MAINTENANCE
Routine maintenance for the Liebert APS, includes proper care, scheduled maintenance and cleaning fan
filters.
7.1 Proper Care
Proper maintenance of the UPS is imperative to optimal performance and life of the unit. We recommend
that a certified technician perform preventive and corrective maintenance. Vertiv™ is dedicated to
ensuring the highest level of performance and unmatched support for your Liebert UPS. Contact your
local Vertiv™ representative for service.
7.2 Scheduled Maintenance
We recommend performing the following maintenance at least monthly:
• Clean unit.
• Clean or replace filters.
• Verify proper airflow.
We recommend performing the following maintenance annually:
• Verify that all power modules are operating properly.
• Verify that all battery modules are operating properly.
• Verify redundancy (if applicable).
7.3 Cleaning Fan Filters
The intake fans contain filters that must be replaced or cleaned periodically, depending on the
surrounding environment. Check filters and replace them if they are very dirty or damaged.
To remove dirt and dust from a filter:
Use a vacuum or rinse out the filter under running water (with the dirt side down). If you cleand with
water, blot the filters dry with a towel and allow to air-dry before reinstalling.
7.3.1 Accessing the Top Filter
1. Remove the display bezel.
2. Remove the user interface module, and lay it on top of the UPS frame.
3. Remove the two screws on the LCD mounting plate
4. Remove the screw in the middle of the filter assembly, remove the filter as shown in Figure 7.1
on the next page, and clean the filters as described in Cleaning Fan Filters on page 77.
5. Replace the filter, mounting plate, user interface module and display bezel.
Vertiv | Liebert® APS™ Installer/User Guide | 77
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