8.
3.
4.
-. Remove the six screws.
6.
5.
7. the cables from the thyristors not are
marked, mark them with and 3. Before disconnecting the cables mark them.
10.
2.
If the Softstarter shall upgrade Torque
Control step 9. Discharge the tools and yourselfby touching
earth (if you are not earthed). Disconnect the cables from terminals 1L1,
3L2, and 5L3 (main voltage).
Disconnect the cables the LV-Board from
the thermal switch and current transformers. Remove the front cover (four screws). Remove the old HV-Board.
If only the HV-Board will changed to
step 21.Step step
1. the cables from the current transformers not
are marked, mark them with and 3. Remove the five screws. Disconnect all cables from the terminals 1to
20, external keypad, “Analogue Out/PTC”
sensor and the Fieldbus plug. Don’t lose the
connector between HV-Board and LV-
Board.
9.
Disconnect the cables the HV-Board from
the thyristors and fans
