Eaton 9395 Plus 1 UPS (225–275 kVA) Installation and Operation Manual
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164201710 Rev 2
www.eaton.com\powerquality
9-1
Chapter 9
UPS Maintenance
The components inside the UPS cabinet are secured to a sturdy metal frame.
All repairable parts and assemblies are located for easy removal, with very little
disassembly. This design allows authorized service personnel to perform routine
maintenance and servicing quickly.
You must schedule periodic performance checks of your UPS system to keep it
running properly. Regular routine checks of operation and system parameters enable
your system to function efficiently for many trouble‐free years.
9.1
Important Safety Instructions
Remember that your UPS system is designed to supply power
EVEN WHEN
DISCONNECTED FROM THE UTILITY POWER
. The UPS module interiors are unsafe until
the DC power source is disconnected and the electrolytic capacitors are discharged.
After disconnecting the utility power and the DC power, authorized service personnel
should wait at least five minutes for capacitor bleedoff before attempting internal
access to the UPS module.
W
A
R
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Servicing and maintenance should be performed by qualified service personnel only.
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LETHAL VOLTAGE PRESENT. This unit should not be operated with the cabinet doors open or protective
panels removed. Do not make any assumptions about the electrical state of any cabinet in the UPS
system.
Because each battery string is an energy source in itself, opening the battery circuit
breaker does not de‐energize the voltage within the battery string.
DO NOT ATTEMPT
TO ACCESS ANY INTERNAL AREA OF THE BATTERY STRING YOURSELF. VOLTAGES ARE
ALWAYS PRESENT IN THE BATTERY STRING.
If you suspect that a battery string needs
service, contact an Eaton service representative.
If the string requires service, refer to the battery manufacturer's operating manual for
instructions on battery maintenance or contact an Eaton service representative.
Observe these precautions when working on or around batteries:
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Remove watches, rings, or other metal objects.
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Use tools with insulated handles.
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Wear rubber gloves and boots.
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Do not lay tools or metal parts on top of batteries or battery cabinets.
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Disconnect the charging source prior to connecting or disconnecting terminals.
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Determine if the battery is inadvertently grounded. If it is, remove the source of the
ground. Contact with any part of a grounded battery can result in electrical shock.
The likelihood of such shock is reduced if such grounds are removed during
installation and maintenance.
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When replacing batteries, use the same number of sealed, lead‐acid batteries.
Figure
