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Maintaining the UPS System
12.1 General
The components inside the UPS cabinet are secured to a sturdy metal frame. All
repairable parts and assemblies are located for easy removal, and 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 will enable your
system to function efficiently for many trouble-free years.
12.2 Important Safety Instructions
Remember that your UPS system is designed to supply power EVEN WHEN
DISONNECTED FROM THE UTILITY POWER. The UPS cabinet interiors are unsafe
until the DC power source is disconnected and all capacitors are discharged. After
disconnecting the utility power and the DC power, authorized service personnel should
wait at least 5 minutes for capacitor bleed off before attempting internal access to the
UPS cabinet.
WARNING:
All the operations in this section must be performed by properly trained
personnel.
By opening, removing or replacing the UPS-modules and module covers you risk
exposure to dangerous voltages!
Do not leave the UPS-module compartment without an appropriate protective
DANGER:
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.
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 you suspect that
a battery string needs service, you should contact Invensys Global Services.
Powerware 9320 (10 kVA and 20 kVA) Installation and Operation
164201416 REV. A 071103
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12-1
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