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7.9 Repair main engine components
7.9.1 Remove back-up
battery
TRM, Centiva/5 Plus, M1047448/CM-922026, rev. 3.50.a
The Centiva/5 Plus CC Ventilator is equipped with a built-in back-up battery that is
designed to provide a minimum of 30 minutes of battery operation.
To remove or replace the battery assembly BE-120104 follow this sequence:
1. Open the main engine according to section 7.2.5.
2. Remove the control panel plate according to section 7.2.6.
3.
Use a 7 mm nut driver to remove the two stop nuts left and right of the
battery.
4.
Remove the battery from the battery bracket. If replacing the back-up
battery disconnect X 23
5.
Use a 7 mm nut driver to loosen the two stop nuts mounting the battery
bracket to the transformer assembly. Do not remove the nuts from the bolts.
6.
Shift the battery bracket backwards to center the stop nuts with the large
bore
7.
Lift the battery bracket up to remove.
8.
For some calibration procedures, the back-up battery assembly is removed
to allow better access to PC board B. In those cases, the back-up battery
must stay connected to PC board B.
9.
If replacing the entire assembly screw the two stop nuts M4 to the
transformer bolts with several turns.
10. Insert the new battery bracket with the stop nuts facing the large bore in the
bottom of the bracket.
11. Move the battery bracket forward to center the stop nuts with the small bore.
12. Use a 7 mm nut driver to fix the stop nuts to the battery bracket while
carefully pulling the bracket forward to center the stop nuts properly with the
small bore while fastening.
13. Insert the battery block onto the battery bracket with its cable and
connectors facing the PC board B.
14. Fix the battery to the battery bracket with the two stop nuts by using a 7 mm
nut driver.
15. Connect the battery connector X 23 to the PC board B.
16. Mount the control panel plate.
17. Close the main engine.
18. Verify proper function after reassembly by performing a power-up test.
Pay attention not to squeeze or damage cables or tubes when reassembling the
Note
battery.
7 Repair procedures
7-29
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