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