Error handling: Motor power OFF.
Error reset: Possible.
Content: A decrease in the mechanical valve I/O 24V supply voltage has been detected. This 24V supply is generated by the optional mechanical valve/sensor board installed on the servo board.
Main causes:
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A ground fault or short circuit in the machine valve I/O 24V wiring.
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The optional mechanical valve/sensor board is faulty.
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A problem with the servo board.
Countermeasures:
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Check the input/output 24V wiring of the mechanical valves (such as the machine harness and separate harness) for ground faults or short circuits.
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Replace the optional machine valve/sensor board on the servo board.
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Replace the servo board.