Note: The illustrations represent a frame 2×R8i inverter cubicle with option +F286 (DC
switch-disconnector). On units without +F286, the DC busbars are oriented differently,
but the procedure is otherwise the same.
1. Do the steps in section Electrical safety precautions (page 44) before you start
the work.
2. Open the inverter module cubicle door.
3. Remove the shroud at the top of the cubicle.
4. Detach the terminal block [X50] at the top of the module.
5. Detach the DC busbars from the module. Make note of the order and position of
the screws and washers.
6. Detach the wiring connected to the terminals on the front of the module (including
fiber optic cabling). Move the disconnected wiring aside.
7. Drives with option +C121 (Marine construction) or +C180 (Seismic design):
a. Loosen the bolts holding the transverse retaining bracket both on the left
and the right. (During reassembly, tighten these screws to 9 N·m [6.6 lbf·ft].)
b. Remove the bolts holding the retaining bracket to the module.
c. Remove the retaining bracket.
d. Reinstall the bolts to the module. Tighten to 22 N·m (16 lbf·ft).
WARNING! Do not proceed before the bolts are securely in place.
Otherwise, the parts of the module can become separated and cause
injury or damage.
8. Attach the module extraction/installation ramp (included) to the base of the
cabinet so that the tabs on the mounting bracket enter the slots on the ramp.
WARNING!
Make sure that the markings on the ramp agree with the plinth height. An
incorrect ramp can cause the module to fall over when removing it from
the cabinet.
9. Remove the two retaining screws at the bottom front of the module.
WARNING!
Before you proceed, make sure the cabinet is level, or chock the wheels of
the module.
10. Remove the two retaining screws at the top front of the module.
11. Pull the module carefully out along the ramp. While pulling on the handle with your
right hand, keep a constant pressure with one foot on the base of the module to
prevent the module from falling on its back.
12. Move the module into a safe location outside the immediate work area and make
sure it cannot topple over. Chock the wheels of the module if the floor is not
completely level.
13. Repeat the procedure for the other inverter modules.
128 Maintenance
To Next Page
Loading...
