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[Flyke DC Pump] Why Does the Water Pump Stop After Running for a While?

Motor Overheat Protection:

  1. Check whether the water pump is completely submerged in water. Since a submersible pump relies on water for cooling, it must not be exposed above the water surface.

  2. Check whether the water temperature is too high. In relatively dry areas, when irrigation is required in summer, high river water temperatures may cause the pump to overheat and activate the protection function.

  3. Check the pump and cable outlet for softening or damage. Some users like to pull the cable to lift the water pump during use. Long-term pulling may cause the sealing point between the cable and the pump to fail, allowing water to enter the motor.

  4. Check whether the pipeline is blocked. If the pipeline is blocked, remove foreign objects. Do not press or block the water outlet to stop water discharge, otherwise the motor may become overloaded, generate heat, and activate the protection function.

Water Pump Impeller Stuck:

  1. Check for foreign objects inside the impeller, especially plastic bags, rubber strips, and other debris wrapped around the impeller, which can cause the water pump to stop after running for a while or stop immediately after starting.

Water Pump Bearing Damage:

  1. Listen for abnormal noises during pump operation. If the pump is not running smoothly, the bearing needs to be replaced.

Insufficient Oil in the Oil Chamber:

  1. Check whether the oil chamber lacks oil. If the oil level is less than 50%, add No. 25 transformer oil or No. 10 transformer oil until the oil level reaches approximately 80%.

The Motor Is Running, but the Water Output Is Too Low. What Should I Do?

Problem Cause

Solution

Valve is closed or not fully opened

Open the valve.

Filter is blocked

Clean the filter.

Incorrect water pump selection

Select a suitable water pump.

Air remains in the pipeline

Drain the water to remove air from the pipeline.

Impeller wear ring and floating wear ring are worn

Replace with a new impeller and pump body.

Motor voltage is too low and the wire is too long

Check the voltage and cable. Try connecting closer to the power source.

 

Why Does the Motor Work Intermittently After the Water Pump Is Started?

Cause of the Problem:

After the water pump is running, the motor operates intermittently. The main reason is that the motor is running under overload conditions, which triggers the thermal protection device and causes the motor to stop. After the water pump cools down, the motor starts again.

Solution:

Check whether the water outlet pipeline of the pump is blocked, or if the selected pump model is too small and needs to be replaced with a larger-capacity pump.

Why Does the Water Pump Not Discharge Water After Starting? Causes and Solutions

Fault Cause

Solution

Incorrect rotation direction of the water pump

1. For three-phase pumps, exchange any two of the three power wires.
2. For single-phase motors, replace the motor.

The pump body and inlet pipeline are not filled with water

Fill the pump body and inlet pipeline with water.

Impeller damaged

Replace the impeller.

Water level is lower than the foot valve

Adjust the inlet pipeline so that the foot valve is submerged in water.

Air leakage in the inlet pipe

Eliminate the air leakage point in the inlet pipe.

Water level is too low and below the maximum suction height of the pump

Lower the pump installation height or select a suitable pump.

Water accumulation in the pipeline or pump chamber causing freezing

Wait until the ice melts before using the pump.

[Domestic Self-Priming Pump] What Should I Do If the Motor Cannot Start?

Fault Cause

Solution

Motor voltage too low:
1. Low power supply voltage (household voltage is generally 220V, range: 198V-242V);
2. Power supply cable cross-section is too small (cable size must not be smaller than the required power rating);
3. Power supply line is too long (for longer distances, use a cable with a larger cross-section).

1. Use a multimeter to measure whether the voltage is normal and adjust it within the rated voltage range;
2. Replace with a power cable of larger cross-section;
3. It is recommended to use a power connection point closer to the pump.

Single-phase power supply (three-phase power supply):
1. Poor contact of the power switch;
2. Fuse blown;
3. Loose power cable;
4. Phase loss in cable.

1. Repair switch contacts or replace the switch;
2. Replace the fuse;
3. Check and tighten power terminals;
4. Repair or replace the cable.

Excessive voltage drop in cable:
1. Cable length is too long;
2. Cable cross-section is too small.

1. Remove unnecessary cable length;
2. Replace with a cable of larger cross-section.

Capacitor burned out

Replace with a capacitor of the same model (send to a repair shop for maintenance).

Shaft and bearing seized

Remove the fan cover and check whether the fan shaft can rotate by hand. If it cannot rotate, replace the bearing (send to a repair shop for maintenance).

Impeller blocked

If the motor makes a humming sound but does not rotate, use a screwdriver to turn the fan blade to make it rotate smoothly, or open the pump body and remove foreign objects.

Stator winding burned out

Replace the winding coil (send to a repair shop for maintenance).

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