Henan Weihua Heavy Machinery Co., Ltd.

Henan Weihua Heavy Machinery Co., Ltd.

What is the reason why the electric hoist cannot be lifted or lowered?

2025 06/03

The reasons why the electric hoist cannot be lowered may be as follows:
 
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1. Brake pad failure: Seriously worn brake pads or improper installation may cause the electric hoist to fail to descend normally.
 
2. Motor or transmission failure: The motor is fatigued or the transmission is stuck, which may cause the lowering function to fail.
 
3. Contactor or control circuit failure: Problems with the lowering button or contactor may prevent the lowering function from starting.
 
4. Wiring problems: Aged, loose, or damaged wires may prevent current from flowing properly to the wires that control the motor.
 
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5. Overload protection starts: If the electric hoist detects that the load exceeds the safe load, it may automatically stop descending.
 
6. Braking system problems: Brake ring wear, insufficient spring pressure, or oil stains on the braking surface may cause unreliable braking and affect the descending function.
 
7. Voltage problem: The voltage is too low or fluctuates too much, which may cause the electric hoist to fail to lower normally.
 
It is recommended that when encountering a situation where the electric hoist cannot be lowered, first check the above possible reasons and take corresponding maintenance measures according to the specific situation. If you cannot solve it by yourself, it is recommended to contact professional maintenance personnel for inspection.