The pump can't start

1. Power is not turn on

2. Connects to wrong voltage.

3. Sensor is broken.

4. CPU circuit board is burned up.

5. Capacitor is burned up.

6. Motor wiring is burned up.

1. Re-connects the power again.

2. Test and make sure it's the right

   voltage.

3. Replaces it.

4. Replaces it.

5. Replaces it.

   Makes sure there's

   no voltage drops on the site.

6. Replaces it.

On/Off frequently

1. Pressure switch is broken

2. Diaphragm inside pressure

   tank is broken.

3. Check valve is hardened or stuck.

4. There is air inside the pump.

5. Discharge pipeline has leakage.

1. Adjusts or replaces it.

2. Replaces it.

3. Replaces it.

4. Opens check valve lid and

   discharges the air.

5. Checks for leakage in the

   pipeline.

Motor is running,

but capacity is small

1. Impeller is damaged.

2. Air is inside the pump.

3. Actual performance can't reach

   customer requirement.

4. Pipeline or valve leakages.

1. Changes impeller

2. Opens drain plug and

   discharges the air.

3. Changes to a bigger

   horsepower pump.

4. Checks for leakage in the

   pipeline or valve.

After it starts for a

while, it stops

immediately

pump will stop automatically.

1. Abnormal voltage.

2. Impeller is stuck with obstacle.

3. When water shortage occurs,

1. Checks voltage and uses right

   voltage.

2. Dismantles pump and cleans

   impeller.

3. Restarts the pump when water

   returns.

Motor is producing

loud noise

1. Bearing is broken

2. Obstacle inside the pump

1. Replaces bearing

2. Dismantles and cleans it