⑴ After the stoppage of the auxiliary machine, if the exit check door is not closed tightly, the auxiliary machine will be reversed. If it is not found and processed in time, it will affect the normal operation of the system, and some auxiliary machines will be seriously reversed, and may even cause a shutdown accident.
⑵ If the two-phase power supply is not opened when the two-phase power supply is not opened when the two-phase power supply is not used, it is easy to cause the motor to burn out.
(3) Do not check whether the rotor is rotating. The rotor has the following hazards when it is reversed: ① The auxiliary machine rotor starts at a static state, and the starting current is already large. When the rotor is started in the reverse state, the originally reversed rotor must become Turning forward, the starting current is greater. Excessive starting current is unfavorable to the motor, which may cause the motor coil or wire rod to loosen or even damage the insulation. ②Some auxiliary machines use parallel nuts to fix the impeller. When the auxiliary machine is reversed, it is easy to loosen the parallel nuts and cause the impeller to loosen.