5 Storage and Maintenance
5.1 Storage
Before storage, charge the UPS minimum for 7 hours. Store the UPS covered and upright position in a cool, dry location.
During storage, recharge the battery in accordance with the Table 5.1 below .
Storage Temperature Recharge Frequency Charging Duration
-25°C to +40°C Every 3 months 1-2 hours
Table 5.1 Storage Conditions
5.2 Maintenance
WARNING! Risk of electrical shock and hazardous voltage. Can cause damage to the equipment, injury or
death to personnel. Extreme caution is required when performing maintenance/repair. Be constantly aware
that the UPS system operates with hazardous voltages.
CAUTION: Risk of hazardous voltage. Can cause equipment damage, injury or death to personnel. Extreme
precaution is required when working with the UPS system as it is connected to the battery packs even after
the UPS system is disconnected from the main connection.
WARNING! Risk of electric shock and hazardous voltage. Can cause equipment damage, injury or death to
personnel. Disconnect the batteries before conducting any kind of service or maintenance and verify that no
current is present and hazardous voltage in the high capability capacitor terminal such as BUS-capacitors.
WARNING! Risk of electric shock and hazardous voltage. Can cause equipment damage, injury or death to
personnel. Servicing of batteries should be performed or supervised by personnel experienced with the
batteries and with the required precautions. Keep unauthorized personnel away from the batteries.
WARNING! Risk of hazardous voltage. Verify that no voltage between the battery terminals and the ground is
present before maintenance or repair. In this product, the battery circuit is not isolated from the input
voltage. Hazardous voltages may occur between the battery terminals and the grounding/earthing.
WARNING! Risk of electric shock and high short-circuit current. It can cause damage to the property and
injury or death to personnel. Remove wristwatches, rings, and other metal objects before installation and
maintenance or repair. Use tools with insulated handles. Wear rubber gloves and boots during installation and
maintenance or repair.
5 Storage and Maintenance Proprietary and Confidential ©2024 Vertiv Group Corp. 81
Vertiv™ Liebert® MTP Online UPS User Manual 20-40-80kVA
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