Many friends may encounter unexpected situations while using electric hoists, which can disrupt our construction progress. Today, the editor will talk to you about common faults and solutions when using electric hoists. Let's take a look together!
1. No power supply
Phenomenon: The motor does not rotate when the switch button is pressed.
Possible reasons: The power supply is not connected or the voltage is too low; The circuit is damaged or loose; Operation switch malfunction; Causing switch malfunction or poor contact.
Solution: Connect the power supply; Check the circuit and repair it; Repair or replace the switch.
2. Lack of phase
Phenomenon: The motor cannot work properly.
Possible reasons: Electrical damage, circuit disconnection, or poor contact in the main control circuit.
Solution: Repair the main control circuit and replace and repair the problematic lines.
3. Low voltage
Phenomenon: The motor runs weakly or stops working.
Possible reasons: power supply and motor with few phases, poor contact of AC contactor.
Solution: Use a multimeter or voltmeter to measure the input voltage of the motor, and repair or replace the contactor.
4. Intense sparks and contact welding
Phenomenon: Intense sparks occur when closing the magnetic starter, and the contacts are welded.
Possible reasons: The contact surface of the contact is burnt out or the starting current is too high, frequently and for a long time closed.
Solution: Repair or replace the contacts.
5. The motor does not rotate (due to mechanical reasons)
Phenomenon: The motor is powered on but does not rotate.
Possible reasons: poor lubrication; Gear or bearing damage; Poor assembly or collision.
Solution: Timely lubrication; Check and replace bearings and gears; Recheck or assemble components or damaged parts.
6. The casing is electrified
Phenomenon: The casing is electrified, posing a safety hazard.
Possible reason: No grounding wire installed; The internal wires are in contact with the casing.
Solution: Check the grounding wire and repair the wire.
7. Limit device malfunction
Phenomenon: The lifting command is opposite to the actual operation.
Possible cause: Limiting device malfunction or improper adjustment.
Solution: Lower the hook to the bottom and completely detach the steel wire rope from the rope drum, readjust the limiter or replace the faulty component.
As an important lifting equipment, the normal operation of electric hoists is crucial for ensuring production safety and improving work efficiency. Mastering its characteristics and common troubleshooting methods can effectively reduce equipment failures and ensure smooth production.
