Siemens SICHARGE UC Panto Kit Repair Instructions page 37

Power box repair cases
7.5 DC Contactor
Instructions
1. Remove the acrylic protection.
2. Disassemble the fuse(s). Follow the instructions described in the chapter FUSE 500A
(Page 34).
Figure 7-6
3. Unscrew the middle screw that connects to the busbar and the power box.
4. Unscrew the upper screw(s) connecting the busbar and the DC contactor(s).
5. Unscrew the lower screw(s) connecting the busbar and the DC contactor(s).
6. Loosen the lower screw(s) connecting the two busbars.
7. Unscrew the DC contactor(s).
8. Label the cables with the connected terminals or take a photo if sufficient.
9. Disconnect all the cables from the PCB.
10. Remove the old DC contactor(s).
11. Install the new DC contactor(s).
12. Tighten the screws on the busbar with the corresponding torque.
13. Marks the nuts with the new position.
14. Restart the system and test the exchanged device.
36
Correct order to unscrew the DC contactor
SICHARGE UC Panto Kit Repair Instructions
Service Manual, 04/2024, A5E53652973-AA