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GENERAL MAINTENANCE
The best preventive maintenance is to operate the ups in a clean environment with proper ventilation and no restrictions
on air intakes and cooling fan outputs.
Battery connections should be tightened annually by qualified electrical personnel. Batteries should be replaced as
indicated by battery testing.
The UPS should be checked monthly for battery operation. Take precautions to have the load in a mode that could
tolerate a shut down. See
“Maintenance - Battery Testing”
for instructions.
COMPLETE MAINTENANCE CHECK
PREPARATION -
A shutdown period must be scheduled to perform maintenance. The loads should be available to
test the UPS with a loss of power simulation.
EQUIPMENT -
Wire brush or other cleaning device (for battery connections), insulated tools (for battery connections)
and safety glasses.
SYSTEM OPERATION
1. With power on, check display functions for proper operation.
2. Turn the AC input breaker off, the UPS will go into inverter mode.
3. Turn the AC input breaker back on, and the unit will return to normal mode.
VISUAL INSPECTION
1. Remove top, front panel (or open door) and remove side panels.
2.
Turn the unit off by means of the monitor and disconnect the battery connector. Then turn off the main input
breaker on the unit and the main feed breaker.
3. Check for burnt, frayed, broken or loose connections. Look closely in the following areas: Input, output
connections, circuit breakers and battery terminals.
4. Correct any loose connections, replace any physically burned or broken components. Use extreme care
when replacing components to assure correct installation.
GENERATOR TEST
1. If a generator is backing up the inverter, check to be sure the inverter operates properly with the generator.
A. Check the generator operation with no load. The unit should switch to inverter when the generator
turns on. After a minute or so the UPS should switch back to normal mode and run off the generator.
B. Check the generator with the loads.
MAINTENANCE PROCEDURES
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Summary of Contents for MODEL ES
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