4 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. Schedule periodic performance checks of
your UPS system to keep it running properly. Regular routine checks of the
operation and system parameters enable your system to function efficiently for
many trouble-free years.
4.1 Important safety instructions
Remember that your UPS system is designed to supply power EVEN WHEN IT
IS 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 must wait at least 5 minutes for capacitor bleed-off before attempting
internal access to the UPS module.
DANGER
LETHAL VOLTAGE. Do not operate the UPS system without the cabinet
doors or protective panels secured. Do not make any assumptions about the
electrical state of any cabinet in the UPS system.
WARNING
All service and maintenance work must be performed by an Eaton authorized
Customer Service Engineer or by a qualified service officer authorized by
Eaton.
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.
DANGER
Do not attempt to access any internal area of the battery string yourself.
Voltages are always present in the battery strings. If you suspect that a
battery string needs service, contact your service representative.
Observe these precautions when working on or around batteries:
• Remove watches, rings, or other metal objects.
• Use insulated tools.
• Wear face protection, insulating electrical gloves and insulating electrical
boots.
• Do not lay tools or metal parts on top of batteries or battery cabinets.
Eaton 9PHD Accessory Cabinets TFC-A, EBC-F
and EBC-G
User's and installation guide
©
Eaton Corporation plc 2022. All rights reserved.
Document ID: P-164000538
55 (63)
