The water pump controller is a key component in the water pump system, responsible for controlling the start, operation and shutdown of the water pump. It can monitor parameters such as water level, pressure, temperature, and adjust the working state of the water pump according to these data. However, the water pump controller may fail during long-term use, which will not only cause the water pump system to fail to operate normally, but also affect the efficiency and stability of the water supply system. This article will analyze the common symptoms and causes of water pump controller failure in detail so that our users and other friends in need can find and solve the problem in time.

What are the common symptoms of water pump controller failure?

The water pump cannot start

• Symptom description: After pressing the start button, the water pump does not respond at all, and even the indicator light of the controller does not light up.

• Possible causes:

• Power supply problem, such as a broken power cord or loose plug.

• The fuse inside the controller is blown.

• The button or switch has poor contact.

• The circuit board inside the controller is damaged.

The water pump starts and stops frequently

• Symptom description: The water pump starts and stops repeatedly in a short period of time, resulting in unstable system operation.

• Possible causes:

• The pressure sensor is faulty and cannot monitor the pressure correctly.

• The difference between the start and stop pressures set by the controller is too small.

• There is a water leak in the pipe or water tank, resulting in frequent changes in pressure.

• The controller relay or contactor is faulty.

The pump continues to run without stopping

• Symptom description: Even if the water tank is full or the pipe pressure has reached the set value, the pump continues to run.

• Possible causes:

• The liquid level sensor or pressure sensor is damaged.

• The internal relay of the controller is stuck and cannot cut off the circuit.

• There is an error in the program setting of the controller.

Abnormal indicator light

• Symptom description: The operating status indicator light of the controller (such as the power light, fault light) flashes abnormally or does not light up at all.

• Possible causes:

• The power supply is unstable.

• The indicator light itself is damaged.

• There is a short circuit or fault in the internal circuit board of the controller.

Insufficient output flow of the pump

• Symptom description: After the pump is started, the output water flow is lower than the normal level.

• Possible causes:

• The controller does not correctly adjust the operating parameters of the pump.

• The pressure sensor fails, causing the pump to fail to reach the rated pressure.

• The current control module in the controller is faulty, limiting the power output of the pump.

The pump stops running suddenly

• Symptom description: The pump stops suddenly during operation and cannot be restarted.

• Possible causes:

• The controller detects an overload or overheat protection signal.

• The thermal relay in the controller triggers protection.

• The circuit board is damp or short-circuited.

Noise or odor

• Symptom description: The controller makes abnormal noise or has a burning smell during operation.

• Possible causes:

• The internal components of the controller are aged or damaged.

• The contactor or relay arcs too much, causing the temperature to be too high.

• The power module is damaged, causing internal overheating.

Controller display error code

• Symptom description: Some advanced water well pump control boxes will display error codes on the display.

• Possible causes:

• Different codes correspond to different faults, such as sensor failure, circuit overload, etc.

• The controller manual needs to be consulted to confirm the specific fault.

  
  

What are the common causes of pump controller failure?

External environmental influences

• Humid environments can cause circuit boards to become damp, causing short circuits or corrosion.

• High temperatures may cause components to overheat and accelerate aging.

• Dust or debris entering the controller may cause poor contact.

Power supply problems

• Voltage fluctuations or power outages may affect the normal operation of the controller.

• Long-term operation at too high or too low voltage may damage the controller's power module.

Component aging

• After long-term use, the performance of components such as capacitors, resistors, relays, etc. inside the controller may degrade or fail.

• Mechanical parts (such as buttons and switches) may not work properly due to wear.

Improper operation

• Improper settings, such as too small a difference between the start and stop pressures, may cause frequent starts and stops.

• Failure to operate according to the instructions may cause confusion in system parameters or damage to components.

Installation problems

• Loose installation of the water well pump controller may cause vibration damage.

• Wiring errors may cause short circuits or overloads.

How to deal with water pump controller failures?

Daily inspection and maintenance

• Regularly check whether the controller's power connection is normal and whether the buttons and switches are sensitive.

• Clean the controller housing to prevent dust or debris from entering the interior.

• Check whether there are any abnormal sounds or odors inside the controller.

Replace damaged components in time

• If the components are found to be aged or damaged, they should be replaced in time.

• Make sure that the replaced components meet the specifications and requirements of the original controller.

Optimize operating parameters

• Set a reasonable pressure range or operating parameters according to actual needs.

• Avoid frequent start and stop to extend the service life of the controller and water pump.

Choose high-quality equipment

• Choose reliable and professional water pump controllers from well-known brands such as JNN to ensure their quality and after-sales service.

• Use equipment that meets environmental conditions, such as waterproof and dustproof models.

Professional maintenance and diagnosis

• When the problem cannot be solved by yourself, you should contact professional maintenance personnel for inspection.

• Use professional equipment to detect the circuits and components inside the controller to confirm the problem.

Conclusion

The water pump control box plays a vital role in the entire water supply system, and its normal operation is directly related to the stability and efficiency of the system. Understanding the common symptoms and causes of water pump controller failure can help users detect problems in the early stage and take timely measures to avoid greater losses due to controller failure. In daily use, good inspection, maintenance and correct operation of the controller can effectively extend the service life of the equipment and ensure the long-term reliable operation of the system.