Thermo AC-4000, Operating And Service Manual

Page: 113 / 242

REC 3838 4-7
4.3.6 Distribution Board Replacement
To replace the Distribution Board, proceed as indicated below.
1. Turn off power at mains.
2. Open the distribution enclosure box (Figure 4-3).
3. Disconnect main AC power cable at Distribution Board terminal block TB-7.
4. Disconnect drive motor cables at Distribution Board terminal block TB-5.
5. Disconnect speed sensor cables at Distribution Board terminal block TB-9.
6. Disconnect wiring to the distribution enclosure at J-14, J-22, J-23, and J-24.
7. Disconnect weightable motor speed control at J-17 and J-18.
8. Disconnect all option cables connected to Distribution Board (Figure 4-4).
Refer to the following list.
OPTION
DISTRIBUTION
BOARD
CONNECTOR
INFEED SPEED CONTROL
OUTFEED SPEED CONTROL
MOTOR INHIBIT J-15, J16
J-19, J20
TB-8
9. Remove screw securing Distribution Board to enclosure.
10. Remove Distribution Board from enclosure by sliding up and lifting out.
11. Verify that fuses on new Distribution Board are the same as old board. The
following list defines the correct fuses.
FUSE
F1 (Infeed Motor)
F2 (Weightable Motor)
F3 (Outfeed Motor)
F4 (Line [L1])
F5 (Line [L2])
115/220 VAC
5A
5A
5A
15A
15A
TYPE
3AG, SB
3AG, SB
3AG, SB
3AB, SB
3AB, SB
12. Install new Distribution Board in enclosure.
13. Replace screw securing Distribution Board to enclosure.
14. Connect all option cables installed on Distribution Board.
15. Connect weightable motor speed control at J-17 and J-18.
16. Connect wiring to the distribution enclosure at J-14, J-22, J-23, and J-24.
17. Connect speed sensor cables at Distribution Board terminal block TB-9.
18. Connect drive motor cables at Distribution Board terminal block TB-5.
19. Connect main AC power cable at Distribution Board terminal block TB-7.
20. Close the distribution enclosure box.