Maintenance; Important Safety Instructions - Eaton 93P User And Installation Manual

3 Maintenance

The components inside the 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.

3.1 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 bleed-off before attempting internal access to the UPS module.
CAUTION
• Servicing and maintenance should be performed by qualified service personnel only.
• 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 your service representative.
If the string requires service, refer to the battery manufacturer's operating manual for instructions on
battery maintenance or contact your service representative.
Observe these precautions when working on or around batteries:

Remove watches, rings, or other metal objects.

Use tools with insulated handles.

Wear rubber gloves and boots.

Do not lay tools or metal parts on top of batteries or battery cabinets.

Disconnect the charging source prior to connecting or disconnecting terminals.

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.
P-164000427
Revision 2
SMALL and LARGE BATTERY CABINET
User's and Installation Guide
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