Powerware 9390 UPS 100160 kVA - Manual (Page 139)

EATON Powerware ® 9390 UPS (20–80 kVA) Installation and Operation Manual S 164201603 Rev 2 www.powerware.com 13-1
Chapter 13 Maintaining the UPS System
The components inside the UPS cabinet are secured to a sturdy metal frame that is
supported by the UPS magnetics. This design allows authorized service personnel to
remove repairable components with very little disassembly. All repairable parts and
assemblies are located in the front of the UPS, allowing all routine maintenance and
servicing to be performed with front panel access.
Schedule periodic performance checks of your UPS system to keep it running
properly. Regular routine checks of operation and system parameters will enable your
system to function efficiently for many trouble‐free years.
13.1 Important Safety Instructions
Remember that your UPS system is designed to supply power EVEN WHEN
DISCONNECTED FROM THE UTILITY POWER. The UPS cabinet 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.
D A N G E R
This UPS contains LETHAL VOLTAGES. All repairs and service should be performed by AUTHORIZED
SERVICE PERSONNEL ONLY. There are NO USER SERVICEABLE PARTS inside the UPS.
W A R N I N G
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Servicing and maintenance should be performed by qualified service personnel only.
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LETHAL VOLTAGE PRESENT. DO NOT operate with the cabinet doors open or safety shields removed. Do
not make any assumptions about the electrical state of any cabinet in the UPS system.
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See “Safety Warnings” on page 2-1.
Since 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 the string requires service, refer to the battery manufacturer's operating manual for
instructions on battery maintenance, or contact your Eaton service representative.
Figure