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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.
Failure to understand the correct bypass sequence and position may cause the critical load to be dropped.
Damage to the power modules or the Bypass switch can occur.
•
If the UPS remains in Bypass Mode and incoming AC power is lost, the load is automatically dropped. The
UPS must be in Normal Mode to provide battery backup power.
•
In the UPS or LINE position, AC input power is still connected to the input terminals inside the UPS.
•
If the UPS is in the standby mode and the bypass switch is in the LINE or UPS positions pressing
the red bypass switch interlock button will energize the UPS output.
•
Do not attempt to push the red interlock button or attempt to move the bypass switch handle if the
UPS is operating on battery power.
•
If you have any questions or problems with the bypass operation, call the Help Desk (see , "
11.2 Service and Support
See "
3.6 Bypass Overview
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.
" ).
" for additional information.
4–20kVA Users Guide P-164000669 4–20kVA Users Guide P-164000669—Rev 10
93
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