Common troubleshooting measures for construction elevators

- Apr 30, 2020-

Common troubleshooting measures for construction elevators

The cage cannot start when there is no load

Causes of failure: (1) The elevator limit or limit switch is not operating normally; (2) The cage is missing phase; (3) The electric lock is not opened or the emergency stop switch is not unscrewed; (4) The normally closed contact of the thermal relay is disconnected The motor brake is not disengaged.

Solutions: (1) Check the guardrail doors, skylights, and single limit to ensure sensitivity; check the integrity of switches and contacts; (2) turn on the power to eliminate the cause of phase failure; (3) open the electric lock or turn out the emergency Stop switch; (4) Adjust the setting value of the component; (5) Test the DC voltage of the brake coil.

Abnormal vibration when the cage is running

Reasons for failure: (1) Loose roller bolts; gears and rack meshing gaps are too large and lack lubricating oil; (2) Standard joints have large step difference at the joint; (3) Looser roller bolts.

Solutions: (1) Tighten the bolts, readjust the clearance of the gear rack and replenish the lubricant; (2) Adjust the butt joint difference and tighten the bolts.

Control fuse blown

Reasons for failure: (1) Short circuit of electromechanical equipment and grounding of equipment; (2) Grounding and overload of some equipment.

Solutions: (1) Repair and replace cables, limit switches, etc .; (2) Ensure that the device is not overloaded; check whether there is leakage near the junction box and whether the device wiring is correct.

Unreasonable motor heating

Causes of failure: (1) Three-phase unbalance of the motor; (2) The motor starts and shuts down too frequently; (3) The overload operation time is too long; (4) The lubrication effect is not good; (5) The brake action is not synchronized.

Solution: (1) Replace or repair the motor; (2) Formulate the use plan, and it is strictly forbidden to open and close at will; (3) It is strictly forbidden to overload; (4) Add lubricant to the gears, chains, etc .; Set the supply voltage.