Supply and inverter modules
￭ Replacing a supply module
WARNING!
Read the safety instructions given in chapter Safety instructions. If you
ignore them, injury or death, or damage to the equipment can occur.
WARNING!
Hot, pressurized coolant may be present in the cooling circuit. Do not work on any
section of the cooling system before it has been depressurized and drained.
WARNING!
Use the required personal protective equipment. Wear protective gloves and long
sleeves. Some parts have sharp edges.
The removal of a module mounted at the rear requires that the module at the front (if present)
is removed first.
Refer to the drawings below.
1.
Stop the drive and do the steps in section Electrical safety precautions (page 16) before
you start the work.
2. Open the door to the supply module cubicle.
3. Open the swing-out frame.
4. Remove the shroud at the lower part of the cubicle.
5. Remove the shroud above the supply modules. Note that two of the screws are fastened
from below.
6. Close the inlet and outlet valves of the supply cubicle.
7. Lead the drain hoses into a suitable container.
8. Open the drain valves located behind the inlet and outlet valves. Make sure the ends
of the hoses are not immersed at any point of the draining so that air can displace the
coolant in the system. Wait until all coolant has drained.
9. Disconnect the wiring from the thermal switch on the module.
10. Disconnect the coolant pipes from the module.
11. Slacken the nuts of the AC fuse blocks and slide the fuses out.
12. Remove the DC bus screws.
13. Remove the four mounting screws of the module and lift the module out.
14. If you need to remove the module in the rear, remove the shroud between the front and
rear modules.
15. Remove the transverse beam.
16. Remove the insulator plate.
17. Repeat steps 9 to 13 for the module in the rear.
18.
Reinstall the modules in reverse order to the above. See also Filling up and bleeding
the internal cooling circuit (page 145).
Maintenance 131
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