Faults, causes and remedies

WARNING

warning

Risk of injury from rotating propeller!

No persons are allowed to be present in the working area of the mixer. There is a risk of injury!

  1. Demarcate and cordon off the working area.
  2. If there are no persons in the working area, activate the mixer.
  3. If persons enter the working area, switch off the mixer immediately.

Fault: The mixer does not start up

  1. Mains connection interrupted or short-circuit/earth fault in the cable or motor winding.
  2. Have the connection and motor checked by a qualified electrician and replace if necessary.
  3. Tripping of fuses, of the motor protection switch or the monitoring device.
  4. Have the connection and the monitoring device checked by a qualified electrician and change it if necessary.
  5. Have the motor protection switches and fuses installed and adjusted according to technical specifications by a qualified electrician and reset the monitoring devices.
  6. Check that the propeller rotates easily, and clean the propeller and mechanical seal if necessary.
  7. The sealing chamber control (optional) has broken the electric circuit (connection-related).
  8. See “Fault: Mechanical seal leakage, pre-chamber/sealing chamber control reports a fault and switches the mixer off”

Fault: Mixer starts up, motor protection trips after short period

  1. Motor protection switch set incorrectly.
  2. Have the setting of the trigger checked and corrected by a qualified electrician.
  3. Increased current consumption due to major voltage drop.
  4. Have the voltage of individual phases checked by a qualified electrician. Contact the power grid operator.
  5. The connection only has two phases.
  6. Have the connection checked and corrected by a qualified electrician.
  7. Voltage differences between the phases are too great.
  8. Have the voltage of individual phases checked by a qualified electrician. Contact the power grid operator.
  9. Incorrect direction of rotation.
  10. Have the connection corrected by a qualified electrician.
  11. Increased current consumption due to clogging.
  12. Clean propeller and mechanical seal.
  13. Check the pre-treatment.
  14. The density of the fluid is too high.
  15. Check unit design.
  16. Contact customer service.

Fault: Mixer runs, but system parameters are not reached

  1. Propeller clogged.
  2. Clean propeller.
  3. Check the pre-treatment.
  4. Incorrect direction of rotation.
  5. Have the connection corrected by a qualified electrician.
  6. Signs of wear on propeller.
  7. Inspect propeller and replace if necessary.
  8. The connection only has two phases.
  9. Have the connection checked and corrected by a qualified electrician.

Fault: Mixer does not run smoothly and is noisy

  1. Improper duty point.
  2. Check fluid density and viscosity.
  3. Inspect system configuration, and contact customer service.
  4. Propeller clogged.
  5. Clean propeller and mechanical seal.
  6. Check the pre-treatment.
  7. The connection only has two phases.
  8. Have the connection checked and corrected by a qualified electrician.
  9. Incorrect direction of rotation.
  10. Have the connection corrected by a qualified electrician.
  11. Signs of wear on propeller.
  12. Inspect propeller and replace if necessary.
  13. Motor bearings have worn.
  14. Inform customer service; send the mixer back to the factory for reconditioning.

Further steps for troubleshooting

If the points listed here do not rectify the fault, contact customer service. Customer service can assist in the following ways:

  • Telephone or written support.
  • On-site support.
  • Inspection and repair at the factory.

Costs may be incurred if you request customer services! Please contact customer services for more information.