Analysis of common faults in automatic washing machine (II)

Fri Dec 07 11:37:37 CST 2018

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      In the last article, we have learned about the four common failure analysis of fully automatic washing machines. Today Alice will analyze the remaining five common faults for everyone. I hope that this article can help you when repairing the washing machine.

 

The 5th Fault:When Washing, The Motor Runs Normally in the Forward and Reverse Directions.

The Pulsator Can Only Reverse in One Direction but Cannot Rotate Forward.

  • Analysis and overhaul:

      This fault is caused by the deformation of the clutch pawl fork or the adjustment screw being screwed too deep, so that the pawl working position cannot be in place. As a result, the washing shaft and the dewatering shaft not being separated in the washing state.

  • Specific reasons and treatment methods:

      When the working position of the clutch pawl is not in position, the square wire clutch spring cannot be dialed. Both of the washing shaft and the dewatering shaft are held by the clutch spring, and the dewatering shaft is gripped by the brake belt in the washing state. When the clutch pulley rotates clockwise, it cannot drive the pulsator to rotate. When the clutch pulley reverses in the counterclockwise direction, it is the clutch square wire clutch spring rotation direction, which separates the washing shaft and the dewatering shaft; the clutch torsion spring is tightened, and the dewatering shaft is still held by the brake belt. The wheel can be rotated in the opposite direction.

      Adjust the adjusting screw appropriately so that the gap between the pawl fork and the brake lever is within the normal range. If the pawl fork is deformed and damaged, the pawl fork can be repaired and corrected. In severe cases, the pawl fork should be replaced to solve the problem. .

The 6th Fault:Draining Speed is Slow.

  • Analysis and overhaul:

      This failure is generally caused by the drain valve not being fully opened or the drain line being poor.

  • Specific reasons and treatment methods:
  1. There is a blockage of debris in the drain valve or the drain hose is bent and deformed. As long as understand the debris in the drain valve or replace the drain hose, you can solve it.
  2. The gap between the drain rod and the rubber valve becomes larger, just properly adjust the gap between the drain rod and the rubber valve.
  3. The spring inside the drain valve is too long or loses its elasticity. Just replace the inner spring.
  4. The drain solenoid valve has too much damping or a small suction force. Remove rust from electromagnet or replace drain solenoid valve.

The 7th Fault:Drainage is not Clean.

  • Analysis and overhaul:

       This fault is generally caused by poor performance of the water pressure switch or air leakage in the air line, so that the air pressure in the air collection chamber becomes smaller. When the water level in the water tank has not dropped to the specified position, the water pressure switch contacts act in advance. So that the total The drainage time is shortened, resulting in a malfunction of unclean drainage.

  • Specific reasons and treatment methods:

      Just try to find the air line leak and use 401 glue sealant. If the water pressure switch is damaged, should be replaced the water pressure switch.

The 8th Fault:Braking Time is Too Long After Dehydration

  • Analysis and overhaul:

      The faulty brake belt cannot hold the dehydration shaft brake wheel, which reduces the brake friction.

  • Specific reasons and treatment methods:
  1. The brake band on the clutch is installed with a skew, the inner lining is worn, or the fastening screw is loose. Just reinstall or replace the brake band.
  2. The brake spring is loose, broken or loses its elasticity. Just reinstall or replace the brake spring.
  3. The brake lever can not be returned by the pawl fork, so that the brake belt cannot hold the dehydration shaft brake wheel tightly. Simply adjust, repair or replace the shift fork position.
  4. The moving iron core is blocked by debris and cannot be fully extended, so that the brake lever cannot be restored to its original position. Just remove the rust on the moving iron core or replace the electromagnet.

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​​​​​​​The 9th fault:When Dehydrating, the Dewatering Bucket Has a Large Vibration Noise.

  • Specific reasons and treatment methods:
  1. There is debris between the dewatering bucket and the washing tub. Just clean the debris.
  2. The dewatering barrel balance ring is broken or leaked, which makes the dewatering barrel lose its balance when it rotates. Just replace the balance ring.
  3. The dewatering bucket flange fastening screw is loose or broken. Just tighten or replace the flange.
  4. The dewatering bucket flange fastening screw is loose or broken. Just tighten or replace the flange.

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