Error handling: Motor power OFF.
Error reset: Possible.
Content: The jumper (JP2 or JP3) setting on the power supply unit control board (1VH), which specifies the number of safety circuits, was not transferred correctly to the servo board.
Main causes:
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The harness between the servo board (X503, X504, X505) and the power supply unit control board (X304) has an open circuit.
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The power supply unit control board is faulty.
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A problem with the servo board.
Countermeasures:
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Check the harness between the servo board (X503, X504, X505) and power supply unit control board (X304).
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Replace the power supply unit control board.
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Replace the servo board.