When the electric hoist is connected to normal voltage but not working, there may be various problems. Here are some common reasons and their solutions:

1、 Power and circuit issues

Poor power supply contact:

Possible cause: The power plug is not securely plugged in or the socket has poor contact, resulting in abnormal current transmission.

Solution: Check if the power plug and socket are securely connected, try unplugging or replacing the socket.

Power line malfunction:

Possible cause: Damage, aging, or poor connection of the power supply line, which prevents effective transmission of electrical energy to the electric hoist.

Solution: Use a multimeter or other tools to check if the power circuit is intact, repair or replace damaged parts of the circuit.

Phase deficiency issue:

Possible reasons: The main and control circuit electrical components of the electric hoist are damaged, the circuit is disconnected, or the contact is poor, which causes the motor to lose phase and cannot work normally.

Solution: Repair the main and control circuits, disconnect the motor from the power line, only supply power to the main and control circuits, then jog the start and stop switches, check and analyze the working condition of the control electrical appliances and circuits, and repair or replace the problematic electrical appliances or circuits.

Voltage too low:

Possible reason: Although the voltage is within the normal range, the motor terminal voltage is more than 10% lower than the rated voltage, resulting in insufficient starting torque of the motor and inability to operate normally.

Solution: Use a multimeter or voltmeter to measure the input voltage of the motor, ensuring that the voltage is stable and not lower than 90% of the rated voltage. If the voltage continues to be too low, it is necessary to check the power supply situation of the grid or consider using voltage stabilizing equipment.

2、 Motor and mechanical issues

Motor malfunction:

Possible reasons: Internal damage to the motor, burnt windings, or bearing failures, which may cause the motor to malfunction.

Solution: Check if there are any abnormal sounds, heating, or other phenomena in the motor. If necessary, have a professional disassemble the motor for inspection and repair.

Mechanical blockage:

Possible cause: The transmission mechanism, brake or lifting mechanism of the electric hoist may experience jamming, causing the motor to be unable to drive the load.

Solution: Check whether the transmission mechanism, brake, and lifting mechanism operate flexibly. If there is any jamming, clean up foreign objects or adjust the position of components.

3、 Control and operation issues

Control switch malfunction:

Possible cause: Damage or poor contact of the main power switch, lifting switch, or control box switch, which prevents the control signal from being transmitted correctly to the motor.

Solution: Check whether each control switch is intact and in good contact. If there is any damage, replace the switch with a new one.

Control circuit issues:

Possible cause: Damage or failure of components such as circuit boards and relays in the control circuit, resulting in the inability to transmit or process control signals properly.

Solution: Check if the components in the control circuit are intact and working properly. If there is any damage, seek professional repair or replacement.

4、 Other factors

Overloading usage:

Possible reasons: Long term overloading of the electric hoist may cause the motor to overheat, be damaged, or experience a decrease in performance.

Solution: Use the electric hoist strictly according to its rated load capacity to avoid overloading.

Improper maintenance:

Possible reason: Long term lack of maintenance and upkeep of electric hoists has led to increased wear and performance degradation of various components.

Solution: Regularly maintain the electric hoist, including cleaning, lubrication, fastening, etc., to ensure that all components are in good working condition.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment