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Question:

Gantry crane can not be up and down what is the reason?

Gantry crane can not be up and down what is the reason?

Answer:

See the contactor does not pull the contact, if the contactor does not move to check the control line,
if the contactor action but the motor did not respond to check whether the motor is burned to check the fire limiter is good or bad.
if the contactor does not move to check the control line, if the contactor action but the motor did not respond

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