Nine common electric chain hoist motor failures
The motor is the heart of Chain hoist and plays a vital role. In actual use, the motor is also prone to failure. The main reasons and solutions for the failure are as follows:
Fault 1: The phase of the power cord is connected incorrectly, which causes the phase protection function to start, so it cannot be operated.
Solution: swap the power cords of the two phases with each other.
Fault 2: The fuse of the power supply is blown or the non-fuse switch is tripped.
Solution: Check whether the current demand is met, replace a suitable fuse or restart the non-fuse switch.
Fault 3: The fuse of the control circuit is burned out.
Solution: Check and replace the correct fuse.
Fault 4: The power cord or the wire of the control circuit is broken or not connected properly.
Solution: Repair or replace broken or poorly connected wires.
Fault 5: The voltage of the power supply is too low.
Solution: Measure whether the voltage value is lower than 10% of the standard supply voltage.
Fault 6: The motor makes a sound, but it does not rotate.
Solution: Check whether the motor phase is correct, maintain and perform insulation actions.
Fault 7: The emergency switch is pressed.
Solution: Confirm the reason for pressing the emergency switch.
Fault 8: bad contactor.
Solution: Manually operate the hoist. If the Chain hoist operates normally, it means that the control coil or wire has poor contact. Find out the location of the poor contact and repair it; if the Chain hoist cannot be operated manually, you need to check whether the main power supply is normal. If there is no problem with the main power supply, the contactor is bad and cannot be output normally, and the contactor needs to be replaced. .
Fault 9: The coil of the contactor is short-circuited. Replace the contactor.
Solution: Replace the contactor.
Chain hoist has been working continuously for a long time, causing the motor to run over frequency. In addition, it may not have good lubrication effect, which will cause the temperature to be too high, so the motor will burn out. Failure of the contactor and fuse, and the wrong line contact can cause phase loss of the motor.