Maintenance 69
Replacing the inverter power module
The inverter power module can be replaced only by a technician who is authorized by
ABB.
Procedure
Removing the inverter module(s)
To allow more room for cabling work, the inverter modules can be removed completely
instead of only the fan carriages.
Refer to the drawings below.
WARNING! Obey the instructions in chapter Safety instructions. If you
ignore them, injury or death, or damage to the equipment can occur.
1. Do the steps in section Precautions before electrical work on page 19 before you start
the work.
2. Open the inverter module cubicle door.
3. Remove the shroud at the top of the cubicle.
4. Disconnect the terminal block [X30] at the top of the module.
5. Remove the DC busbars from the module. Make a note of the order and position of the
screws and washers.
6. Disconnect the wiring connected to the terminals on the front of the module (including
fiber-optic cabling). Move the disconnected wiring aside.
7. 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! Do not use the ramp included in the inverter delivery with plinth
heights over 50 mm.
8. Remove the two 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.
9. Remove the two screws at the top front of the module.
10. 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.
11. 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.
12. Repeat the procedure for the other inverter modules.
Proceed to Connecting the motor cables (page 114).
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