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10. Preventive Maintenance
All the maintenance operations should be done by authorized LEGRAND UPS
Technical Service Personnel.
Residual voltage and high temperature metal parts inside even if the UPS is
disconnected. Contact may cause electric shock and burns. All operations except
replacing battery fuses shall be carried out by the authorized LEGRAND UPS Technical
Service Personnel only.
10.2. Battery Fuses
There is a risk to blow battery fuses if the battery circuit breaker is closed when the dierence between
Battery Voltage and DC Voltage is exceeding 10VDC.
Please check commissioning procedure in Section 7.
Battery fuses should only be replaced with the same rating and type.
Do not open or mutilate batteries. Released electrolyte is harmful to the
skin and eyes.
It may be toxic.
Batteries should always be replaced by authorized LEGRAND UPS Technical Service Personnel.
Danger of explosion and re if incorrect battery type is used.
Risk of electrical shock, injuries and chemical hazard, lethal voltage present.
When replacing batteries, the same quantity and type that were originally tted should be
used.
Batteries must always be disposed of according to local environmental laws.
Preventive Maintenance includes extended control of all the electronic and mechanical components in
UPS and permits to replace components before their end of life to assure optimum availability of your UPS
system for your critical load.
Periodic maintenance also ensures safe and ecient operation of your UPS system.
LEGRAND recommends a minimum yearly periodic maintenance visit by authorized LEGRAND UPS
Technical Service.
10.1. Batteries
The life of batteries strongly depends on the usage and environmental conditions. (ambient temperature,
frequency of mains outage, etc.). There are also other factors like the number of charge-discharge cycles
and discharge depth. Performing battery test can provide you information about battery health condition,
but not to avoid any risk of battery failure during mains outage.
The batteries should be maintained and checked periodically by authorized LEGRAND UPS Technical
Service Personnel and replaced before their end of life.
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