Berthold castxpert LB 452, Operating Manual

Page: 134 / 156

c
9 Maintenance
134
Rev. 04, 03/2015
b
Replacing of Fuses
(Continued)
System Board
The two mains fuses Si1 and Si2
on the system board fuse the
power supply unit.
If there is a defect in the fuses, no
power is supplied to the EVU.
9.2.1 Replacing of Basic Module Fuse
1. Disconnect the EVU voltage.
2. Loosen the three screws on the front panel (Fig. 11, Pos. 2).
3. Fold the front panel down.
4. Pull out the basic module and if need be the extension module and/or
fieldbus module (Fig. 10, Pos. 3) carefully.
5. Remove the flat ribbon cable, if needed, (Fig. 10, Pos. 2) from the extension
module and/or the fieldbus module
6. Pull carefully on the fuse (Fig. 81, Pos. 1) until the top part is fully removed.
7. Remove the plastic covering from the fuses (Fig. 81, Pos. 2).
8. Take the fuses out carefully.