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