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C C h h a a p p t t e e r r 9 9 M M a a i i n n t t e e n n a a n n c c e e
9 9 . . 1 1
R R o o u u t t i i n n e e M M a a i i n n t t e e n n a a n n c c e e
This chapter provides maintenance information to help maintain proper UPS operation.
The Eaton 9PXM system is designed to provide years of trouble-free operation. Its internal control system
checks the batteries and inverter periodically to ensure reliable operation.
The Eaton 9PXM UPS and optional external battery cabinets do require some attention to assure continued
reliable service. Follow Eaton's recommended maintenance schedule, which includes:
•
Check operating environment for clean, cool, dry conditions.
•
Inspect and clean the area around the UPS
•
Check operation of fans (power modules).
•
Check the batteries.
For more information on preventive maintenance checks, contact your service representative.
9 9 . . 2 2
S S t t o o r r a a g g e e T T e e m m p p e e r r a a t t u u r r e e
Store the Eaton 9PXM battery modules (in the UPS or external battery cabinet) at –20 to +40°C (–4 to +104°F).
Batteries will have a longer shelf life if they are kept below +25°C (+77°F). The Eaton 9PXM UPS or battery
cabinet without batteries may be stored at –40 to +60°C (–40 to +140°F).
9 9 . . 3 3
E E x x t t e e r r n n a a l l B B y y p p a a s s s s S S w w i i t t c c h h ( ( M M a a k k e e B B e e f f o o r r e e B B r r e e a a k k O O n n l l y y ) ) O O p p e e r r a a t t i i o o n n
Press the red button beside the switch before turning the Eaton MBB bypass switch. This button:
•
Sends an electrical signal to the UPS to switch to the internal Bypass mode (if it is not already operating in
that mode).
•
Operates a mechanical interlock, to prevent the switch from being turned without first signaling the UPS.
See "
3.6 Bypass Overview
9 9 . . 4 4
B B a a t t t t e e r r y y R R e e p p l l a a c c e e m m e e n n t t
The Eaton 9PXM hot-swappable feature lets you replace the battery modules without disconnecting the load or
damaging the batteries.
To replace a two-battery slot in pairs:
1.
Remove the front cover.
NOTE 1
Observe important safety precautions while performing these checks.
NOTE 2
Eaton recommends that you schedule preventive maintenance checks at least every six
months.
NOTE 1
When the red button is released, the UPS remains in its internal Bypass mode.
NOTE 2
Return the UPS to Auto mode by selecting that mode on the front panel display.
" for additional information.
NOTE
The Eaton 9PXM UPS will operate with uncharged (or no) batteries, but will have limited
(or no) battery backup capability. The UPS will indicate an alarm with a insufficient
number of batteries present. One battery string (two battery modules) must be installed
adjacent to each power module.
4–20kVA Users Guide P-164000669 4–20kVA Users Guide P-164000669—Rev 09
97
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