Emerson 240V Manuel D’Utilisation

Keeping your Liebert Nfinity UPS operating properly is imperative to optimal performance and life of 

the unit. It is recommended that a certified technician perform preventive and corrective mainte-

nance. Liebert Global Services (LGS) is dedicated to ensuring the highest level of performance and 

unmatched support for your Nfinity UPS. Contact an LGS representative for service to guarantee 

maximum reliability and system availability.

It is recommended the following maintenance is performed at least monthly:

• Clean unit
• Clean / replace filters
• Verify proper airflow

It is recommended the following maintenance is performed annually:

• Verify all Power Modules are operating properly.
• Verify all Battery Modules are operating properly.
• Verify redundancy (if applicable).

Nfinity’s intake fans contain filters that will need to 

be replaced or cleaned periodically, depending on 

the surrounding environment. Check by removing 

the bottom bezel and noting the condition of the two 

filters. If filters are dirty, replace them by removing 

the plastic cover over the filter frame and inserting 

a new filter in its place. Use caution when replacing 

filters when fans are running.
The fan filters are washable and can be reused. To 

wash filters, place them under running water (with 

the dirt side down) to remove dirt and dust. Blot dry 

with a towel and allow air-drying before reusing.