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Remove the front cover (four screws).
5. Disconnect the cables the HV-Board from
the thyristors and fans.
9.
3. Discharge the tools and yourselfby touching
earth (if you are not earthed). Disconnect the cables from terminals 1L1,
3L2, and 5L3 (main voltage). Mark the cables from
the thyristors with L1, and L3.
Mark the cables from the current transformers
with CT1, CT2 and CT3.
7.
6.Step step
1. Remove the five screws.
2. Don’t lose the
connector between HV-Board and LV-
Board.
-. Remove the old HV-Board.
4.
8. Remove the six screws. Before disconnecting the cables mark them. Disconnect all cables from the terminals 1to
20, external keypad, PTC sensor and the
Fieldbus plug.
10. Disconnect the cables the LV-Board from
the thermal switch and current transformers
