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Q : Check the clearance between car door knife and hall door ball before high speed running.
A: Problem: During running, if the clearance between car door knife and hall door ball is so small that friction occurs, when the elevator runs fast, the door lock will break suddenly, the elevator will stop immediately and EC160 may alarm No.137 fault, No.31 fault, A4 No.104 fault, A5 No.105 fault and A6 No.106 fault.
Solution: Before high speed running, inspect running and adjust the clearance so that the hall door ball is in the middle of car door knife.
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