Drainage

Why does it turn on frequently? Why does the pumping station often turn on: what to do

Why does the pumping station often turn on?
This question interests many owners of such installations. Proper operation of the equipment provides the site or country house with the necessary amount of water at the right time for their owners, but over time, like any device, the station requires repair.
One of the reasons may be the frequent activation of the pumping station. Why this happens and how to fix the problem yourself can be found in this article.

Design and principle of operation of pumping station equipment

The pumping station includes:

Position 1 – pump. Usually it is centrifugal, which includes a single-phase motor and a pumping element.
2 – hydraulic accumulator, is a metal tank, inside of which there is a membrane, with a platform for fixing the pump and paws for its fastening. On one side of the device there is a threaded outlet for installing a water supply pipe, on the other there is a nipple through which air is pumped. Usually covered with a plastic or rubber lid.
3 – pressure switch. This is usually a black box with two wires, which is screwed at one end to the pressure manifold.
There is a plastic screw on the outside; if you unscrew it, you can remove the cover and see the inside of the device. Serves to control the values of upper and lower pressure; when one of them is reached, the pump can be turned on or off.
4 – pressure gauge. You can do without it.
5 – collector.
6 – bypass pipe. It is a flexible liner of smaller or larger diameter.

The operating procedure of the pumping station is detailed in the instructions for its operation, which indicate:

After installation and connection of the system is completed, water enters the hydraulic accumulator and fills the entire water supply system.
When the water pressure in the system reaches its maximum limit, the electric pump turns off.
The water tap should open, and at the first moment the liquid begins to flow out of the accumulator.
With an increase in water flow, the pressure in the system begins to drop to the lower setting limit of its relay, then the electric pump turns on again.
Water begins to be directed to the consumer and at the same time to the hydraulic accumulator.
Having reached the upper limit value, the fluid pressure of the relay setting, the system turns off again.
Such cycles of turning the equipment off and on are repeated until the water completely leaves the system.

Tip: To reliably regulate the operation of the system, it is necessary to install a check valve on the suction line; it must have a mesh filter for rough water purification.

Installation of a pumping station

The photo shows installation in a water supply system.
In this case, attention is drawn to:

Plastic pipes or hoses are not bent or twisted.
All pipe connections were well sealed. Air leakage in this case can have a negative impact on the operation of the equipment.
Quick-release connections provided convenience when servicing the pumping station.
The suction pipe had a check valve at the end with a mesh and a main filter placed in front of the pumping station, protecting it from small mechanical particles.
The suction pipe was lowered with its end into the water at least 30 centimeters, from the lowest liquid level. The distance between the bottom of the container and the end of the suction pipe must be at least 20 centimeters.
A check valve installed on the outlet pipe of the device helps prevent water hammer that may occur when turning the unit on/off.
The pumping station was well secured in the required position.
A large number of bends and taps in the equipment were not allowed.
When suctioning from a depth of more than four meters or, the existence of a horizontal section of the same length, a larger pipe diameter was used, which significantly improves the operation of the equipment.
Ensure that water is drained from all points of the system in case of possible freezing during the cold season. In this case, you need to install drain taps and check valves, which should not interfere with the drainage of water.

The pump must be securely fixed.
For this:

The device is placed on a flat area, closer to the water source.
In the place where the pumping station is located, it is imperative to organize ventilation, which will make it possible to reduce humidity and lower the air temperature.
The distance from any wall to the pumping station must be no less than 20 centimeters to ensure access to it during maintenance.
Pipes must be of the appropriate diameter.
Holes are marked and drilled to fix the pumping station.
The absence of mechanical stresses and pipe bends is checked, and the fastening screws are tightened.

What breakdowns of the pumping station can occur and methods for eliminating them

The causes of breakdowns and methods for eliminating them are suggested in the table:

Malfunction	How to fix
Why doesn't the pumping station turn on?
There is no power supply voltage. The fuse has blown. The impeller is jammed.	The electrical connection circuit of the equipment is controlled. The pump is being cleaned. The fan impeller rotates; if this is not possible, the motor is jammed. The engine cannot be turned on until the problem is resolved. The safety of the contacts of the pressure switch is checked. The operation of the capacitor pos. 1034. Tip: It is necessary to start repairing the pump after the water is completely drained, then all devices are disconnected: tank, pressure gauge, pressure switch
There is no water in the system. The suction height does not exceed 7 meters. The pipeline draws air for suction. There is debris in the valve.	Fill the unit with water. Reduce suction height. Remove suction from the suction line. Clean the valve.
The engine speed is low, and the voltage drop in the network is large. There is increased resistance in the pressure pipe, debris has entered the pipeline or sharp kinks have formed.	Adjust the voltage stability in the network. Make the resistance smaller or take new pipes for water supply. If the hydrophore malfunctions, change the diffuser pos. 1007 and guide.
The station does not pump water when the engine is running.
There is no liquid in the station pump. Air has entered the suction pipe. Debris has entered the supply or suction pipes. The system runs dry.	The water level is controlled. All gaps in the pipeline are removed. The suction pipeline is cleaned. Perhaps an air lock has formed in the middle of the pipe due to a long horizontal section of the pipeline. The entire pipeline should be filled with water, preferably under pressure, which will help eliminate the air lock. Tip: To avoid this, the horizontal section of the pipe should be at a slight slope, which is directed towards the water intake. The reasons that create conditions for equipment to operate “dry” are removed.
Not enough water supplied
The pump "suffices" for air. There was debris in it. The pipeline is clogged. There is air in the suction pipe.	The pump and water supply pipes are cleaned. Gaps are removed. Even very small air leaks are eliminated. The inlet structure, damaged by pipeline corrosion, must be replaced.
The pumping station turns on and off frequently
The membrane for the expansion tank was damaged. There is no compressed air or very little pressure in the expansion tank. The check valve has opened due to blockage by a foreign element.	The membrane or expansion tank needs to be replaced. Remove the crack that has appeared in the tank body due to corrosion. Pump air into the expansion tank and check the pressure with a pressure gauge. Unblock the check valve.
The station does not create the nominal pressure
Its relay is adjusted to very low pressure. Fluid supply pipe is blocked or blocked. Air has entered the suction line.	Adjust the pressure switch. It is necessary to clean the holes in the pressure switch if it is clogged After turning off the power, the pump or supply pipeline is dismantled and cleaned. The tightness of the connections placed on the suction pipeline. It is controlled that there is no reverse corners or knees.
The station does not turn off during prolonged operation
The pressure switch is set to a very high value.	The pressure switch is being adjusted

How to prepare a pumping station for winter

In order for the equipment to serve for a long time and its price to be paid off faster, it is necessary to properly preserve it for the winter period, which includes:

The power supply is removed from the station: the plug is pulled out of the socket and the safety circuit breaker is turned off.
The pressure in the system is relieved: if present, the drainage is opened; if not, the tap closest to the station is opened.
The suction hose is disconnected.

Advice: You need to be careful when doing this. Remaining water in the system may leak from the pump.

The pressure pipe or hose is disconnected.
The air pressure in the accumulator is checked.
It should be greater than or equal to 1.5 bar.
The remaining water from the pump is drained by any means.
The remaining water is drained from the hoses and pipes.
All elements of the station are carefully stacked until spring.

The system is assembled in the spring in the reverse order. How to troubleshoot a problem if the pumping station turns on frequently can be seen in detail in the video in this article.

It is usually created using a pumping station. It’s clear that it’s better if it works without problems, but breakdowns do happen from time to time. To quickly restore water supply and save on services, you can repair the pumping station yourself. Most of the breakdowns can be fixed on your own - you don’t have to do anything too complicated.

Composition of the pumping station and purpose of parts

A pumping station is a collection of individual devices connected to each other. To understand how to repair a pumping station, you need to know what it consists of and how each part works. Then troubleshooting is easier. Composition of the pumping station:

Each part is responsible for a specific parameter, but one type of malfunction can be caused by the failure of various devices.

Operating principle of the pumping station

Now let's look at how all these devices work. When the system is first started, the pump pumps water into the accumulator until the pressure in it (and in the system) is equal to the upper threshold set on the pressure switch. While there is no water flow, the pressure is stable, the pump is turned off.

Somewhere they opened a tap, drained the water, etc. For some time, water comes from the accumulator. When its quantity decreases so much that the pressure in the accumulator drops below a threshold, the pressure switch is activated and turns on the pump, which pumps water again. It is again switched off by the pressure switch when the upper threshold is reached - the shutdown threshold.

If there is a constant flow of water (a bathtub is being filled, the watering of the garden is turned on), the pump runs for a long time: until the required pressure is created in the hydraulic accumulator. This periodically happens even when all the taps are open, since the pump supplies less water than flows out from all points of analysis. After the flow has stopped, the station operates for some time, creating the required reserve in the gyroaccumulator, then turns off and turns on after water flow appears again.

Problems and malfunctions of pumping stations and their correction

All pumping stations consist of the same parts and their breakdowns are mostly typical. It makes no difference whether the equipment is Grundfos, Jumbo, Alco or any other company. The diseases and their treatment are the same. The difference is how often these malfunctions occur, but their list and causes are usually identical.

The pumping station does not turn off (does not gain pressure)

Sometimes you notice that the pump has been running for a long time and will not turn off. If you look at the pressure gauge, you can see that the pumping station is not gaining pressure. In this case, repairing the pumping station is a long process - you will have to go through a large number of reasons:

If the shutdown limit of the pressure switch is much lower than the maximum pressure that the pump can create, and for some time it worked normally, but then stopped, the reason is different. Possibly at the pump the impeller has worked. Immediately after the purchase, he coped, but during operation the impeller wore out and “now I don’t have enough strength.” Repair of the pumping station in this case means replacing the pump impeller or purchasing a new unit.

Another possible reason is low voltage in the network. Maybe the pump is still working at this voltage, but the pressure switch is no longer triggered. The solution is a voltage stabilizer. These are the main reasons why the pumping station does not turn off and does not build up pressure. There are quite a lot of them, so the repair of the pumping station can take a long time.

Pumping station repair: turns on frequently

Frequent activation of the pump and short periods of its operation lead to rapid wear of the equipment, which is very undesirable. Therefore, repairs to the pumping station must be carried out immediately after the “symptom” is detected. This situation occurs for the following reasons:

Now you know why the pumping station often turns on and what to do about it. By the way, there is another possible reason - pipeline leakage or some kind of connection, so if all of the above does not apply to your case, check if the joint is leaking somewhere.

Air in water

There is always a small amount of air in the water, but when the faucet starts spitting, something is not working correctly. There may also be several reasons:

The pumping station does not turn on

The first thing to check is the voltage. Pumps are very demanding when it comes to voltage; at low voltage they simply don’t work. If everything is normal with the voltage, the situation is worse - most likely the motor is faulty. In this case, the station is taken to a service center or a new pump is installed.

If the system does not work, you need to check the electrical part

Other reasons include a faulty plug/socket, a frayed cord, burnt/oxidized contacts where the electrical cable is attached to the motor. This is something you can check and fix yourself. More serious repairs to the electrical part of the pumping station are carried out by specialists.

The motor hums, but does not pump water (the impeller does not rotate)

This malfunction may be caused low voltage in the network. Check it, if everything is normal, move on. We need to check if it's burned out capacitor in terminal block. We take it, check it, change it if necessary. If this is not the reason, we move on to the mechanical part.

First, you should check whether there is water in the well or borehole. Next, check the filter and check valve. Maybe they are clogged or faulty. Clean, check operation, lower the pipeline into place, and start the pumping station again.

We check the impeller - this is already a serious repair of the pumping station

If that doesn't help, the impeller may be jammed. Then try turning the shaft manually. Sometimes, after a long period of inactivity, it “sticks” - it becomes overgrown with salts and cannot move on its own. If you cannot move the blades by hand, the impeller may be jammed. Then we continue the repair of the pumping station by removing the protective casing and unlocking the impeller.

Some types of repair work

Some steps to repair a pumping station with your own hands are intuitive. For example, cleaning a check valve or filter is not difficult, but replacing a membrane or bulb in a hydraulic accumulator can be difficult without preparation.

Replacing the “pear” of the hydraulic accumulator

The first sign that the membrane is damaged is frequent and short-term switching on of the pumping station, and the water is supplied in jerks: sometimes strong pressure, sometimes weak. To make sure that the problem is in the membrane, remove the plug on the nipple. If it is not air but water that comes out of it, then the membrane is torn.

To begin repairs, disconnect the system from the power supply, relieve the pressure - open the taps and wait until the water drains. After this you can turn it off.

Loosen the flange at the bottom of the tank. We wait until the water drains.
Unscrew all the bolts and remove the flange.
If the tank is 100 liters or more, unscrew the membrane holder nut at the top of the tank.
We remove the membrane through the hole in the bottom of the container.
We rinse the tank - there is usually a lot of rust-colored sediment in it.
The new membrane must be exactly the same as the damaged one. We insert the fitting into it, which secures the upper part to the body (tighten it).
We install the membrane in the accumulator tank.
If there is one, install the membrane holder nut in the upper part. If the tank is large, you won't be able to reach it with your hand. You can tie the holder to a rope and install the part in place by screwing on the nut.
We tighten the neck and press it with a flange, install the bolts, sequentially tightening them several turns.
We connect to the system and check the operation.

Replacement of the pump station membrane is completed. The matter is not complicated, but you need to know the nuances.

Building your own country house or comfortable summer cottage is impossible without creating a water supply system. When constructing a water supply system based on an autonomous source of water supply (for example, a well or well), the main component of the system is a set of equipment that maintains constant pressure in the pipelines.

This is a rather complex technical device, in which malfunctions may occur for one reason or another. A competent owner needs to know the main possible malfunctions and options for eliminating them, for example, why it often turns on.

Composition of pumping station equipment+

If you want to quickly determine the causes of possible malfunctions of pumping equipment, you need to know its structure and operating principle. So, the most widely used models of pumping stations consist of the following main components. And the presence of the property’s own water supply system imposes on the owner the responsibility for maintaining the equipment. If may be different. So, any responsible homeowner must know how to repair a pumping station with his own hands.

It can operate on various principles (for example, vortex or centrifugal pumps), located on the surface of the earth or immersed directly into the well. Such pumps have different capacities, which should fully meet all the needs of the residents of the house. Such devices wear out from continuous operation, therefore, to maintain constant pressure in the water supply system, additional components and devices are used, described below.

To maintain stable pressure in the water supply system, it is used hydraulic accumulator. One of the most common models of such devices is a tank-container with strong walls, inside of which there is a membrane made of elastic rubber. During operation of the complex of pumping devices, water enters the battery tank and the rubber membrane stretches. After the pumping of water stops, the rubber membrane, trying to return to its original position, begins to squeeze out water into the cavities of the pipelines. Thus, constant pressure is maintained in the water supply.

You might be interested in information about which one to choose

The activity of the pumping device and hydraulic pressure accumulator is “conducted” block with control mechanical relay, which is a set of mechanical sensors and springs. The relative position of its parts determines the level of minimum pressure in the pipes of an autonomous water supply system and the difference between the minimum and highest values.

Incorrect operation of any of the component parts of the station can lead to the fact that the complex of pumping devices will be constantly turned on, which will lead to premature wear and subsequent failure.

Incorrect operation of the pressure regulator

A possible reason for the constant switching on of the pressure pump in the equipment complex may be incorrect operation of the control mechanical relay. In order to check the adequacy of its activities, it is necessary to carry out a number of manipulations.

If your equipment includes a built-in pressure gauge, check the accuracy of its readings. This can be done with a regular car pump. After you have verified the measuring device, proceed to check the adjustment unit. First, remove the protective plastic cover.

To adjust the mechanism in the system, it is necessary to create working pressure. It can be simulated by pumping air into a pressure accumulator using a car pump with a built-in pressure gauge. Air is pumped into the battery cylinder through a safety valve.

Use the pump to set the minimum pressure in the water pipes. Use a flathead screwdriver to turn the adjusting screw that secures the large spring of the station control relay. Typically, turning the screw clockwise increases the pressure threshold at which the pump starts working, and turning the screw counterclockwise decreases this threshold.

If the pump turns on frequently, most likely the threshold is somewhat too high. Turn the large spring screw counterclockwise and bleed and pump back air several times. The automatic relay should operate after bleeding the air, when the minimum pressure threshold specified in the station operating instructions is reached.

Too frequent switching on of a pump in a complex of equipment can also occur due to an incorrectly set maximum threshold on the automatic relay. The large spring of this block regulates the minimum threshold, and the smaller spring is responsible for the range between the threshold for the start and end of pump operation. After setting the minimum level, you must also adjust the range by setting the upper threshold to 95 percent of the maximum allowable pressure in the system.

If the range is too small, the pumping device will not pump a sufficient amount of water into the system in one operating cycle, which will lead to an increase in the frequency of its activation. The small relay spring can also be adjusted with a simple slotted screwdriver. The correct setting of the range is checked by several cycles of pumping and deflating air and observing the pressure gauge readings.

Another reason for the malfunction of the automation unit can be simple clogging of the relay inlet. This may occur due to contamination of the water with foreign impurities. Clean the hole with a stiff brush.

Checking the injection pump

Frequent activation of the pump may be a consequence of insufficient power supply to the device. In this case, the pump impeller simply will not be able to develop the necessary power to create maximum pressure in the system pipelines. The pump will have to turn on and run again and again to fill the pipes with water.

The problem of insufficient power can be hidden in both the mechanical and electrical parts of the pump, as well as in the power source of the device.

The working components of the mechanical part of the pumping device can wear out over time with a decrease in the maximum output pressure. You can check the pump pressure by disconnecting it from the system and visually assessing the water flow. In addition, the pump can be started forcibly, bypassing the automation unit and the maximum pressure can be assessed using the pressure gauge of the water supply system. As a rule, the working units of pumps are beyond repair and must be replaced entirely.

The mechanical part of the centrifugal pump also has inlet and outlet connections, which can become clogged after a long period of operation. If such a malfunction is detected, mechanical cleaning of the pipes or rinsing them with a cleaning solution will help.

Checking the electrical part must begin with the terminal box. From prolonged use, the contact surfaces may oxidize, the conductivity of the electric current may decrease, and the pumping device will not be able to produce the required power. To eliminate this drawback, turn off the power to the equipment, open the terminal box cover and clean the surface of the contacts. You can use fine sandpaper for cleaning.

Insufficient power of the centrifugal pump may be a consequence of unstable voltage in the energy network of your home. Voltage stability must be checked while the device is running. If the current levels in your home's power grid are unstable, you need to connect a voltage stabilizer.

Checking the pressure accumulator

The next device that needs to be adjusted or checked is the hydraulic accumulator.

Excessively frequent activation of the centrifugal pump in the station may occur due to the fact that there is damage in the accumulator tank, causing water leakage. Also, during operation, the rubber membrane of this device may be damaged or significantly stretched.

The deficiency can be corrected either by replacing components or by completely replacing the hydraulic accumulator.

By the way, checking the integrity of the rubber membrane in this device is very simple. This can be done without disassembling the tank. You just need to press the nipple valve located on the part of the pressure accumulator that should be filled with air. When you press the valve, air should bleed out of it. If water comes out of the valve hole, then the situation is bad and the rubber membrane, or even the entire hydraulic pressure accumulator, will have to be replaced. How to install n You can read in our article.

Unstable, jerky operation of the centrifugal pump complex in the station can also be a consequence of hidden leaks in the autonomous water supply pipe system. The situation is complicated by the fact that the leak may occur in a pipe located below the surface of the earth. It is quite difficult to identify such a malfunction.

However, if you approach such a problem consistently, then you can solve it too. To do this, it is necessary to sequentially, segment by segment, shut off the entire water supply system and pump water into it under pressure and leave it for some time. A pressure gauge must be connected to each segment being tested. If the pressure gauge needle maintains its position for several tens of minutes, it means that this segment of the water supply system has retained its tightness. In this case, you should move to the next segment and so on until a leak is detected.

As you can see, identifying and eliminating malfunctions that lead to the station’s centrifugal pump turning on too often can take quite a long time. However, without eliminating this breakdown, you risk damaging your pump much earlier than the time specified by the manufacturer.

To become more familiar with the composition and repair procedure, watch the video tutorial.

Prices for pumping stations

pumping stations

Video - Why the pumping station often turns on

Pumping stations are usually used to organize an autonomous and high-quality water supply in a private home. They can also be used to improve the quality of water supply in an apartment. Of course, like any other devices, pumping stations can break down. However, if you wish, even without much experience, you can repair the equipment yourself without unnecessary problems.

Peculiarities

Pumping stations often consist of a water pump, hydraulic accumulator, pressure switch and pressure gauge. Their main task is to automatically collect water from a specific source and deliver it to the house. The station also allows you to improve the water pressure in the water supply, protect the water supply system from water hammer and organize a supply of water if problems with the water supply suddenly arise.

Surface pumps are predominantly used. To install pumping stations in a private house, a separate room with good sound insulation is most often allocated. They can also be installed in caissons.

The pump power should be sufficient to lift water from the well and deliver it to the house. One of the most important parts of the station is the hydraulic accumulator; its storage tank should contain at least 20 liters. The hydraulic accumulator allows maintaining constant pressure in the station pipelines. The most successful battery model is a metal cylinder with a rubber membrane inside. When the station is operating, the membrane stretches, and at rest it takes its previous position.

The pressure switch turns the pump on and off depending on the water level in the tank. Water enters the tank until it reaches a certain maximum level, and then the pump turns off. As water is consumed for various needs, the pressure decreases. When the pressure reaches the minimum level, the pump will turn on again and water will flow into the tank. A pressure gauge is needed to determine the pressure level in the water supply system.

Each element of the pumping station can work either on its own or as a single system. You can choose either a completely ready-made pumping station or assemble it yourself, taking into account your own needs. Pumping stations can easily provide water not only to a house, but also to a bathhouse and other buildings on the site. When the principle of operation of the station is clear, it is easy to identify and eliminate many breakdowns.

Causes of malfunction

Like any devices, pumping stations can have various malfunctions. Among them there are the most common ones, you should learn a little more about them.

The pump starts too often:

If the water flows in jerks, the cause of this malfunction is most often a non-working automation unit, in particular, a pressure gauge.
If the pressure gauge readings drop sharply, then it is then that the water will flow in jerks. This occurs as a result of the failure of the pressure accumulator membrane, which changes its size based on the volume of water. To determine this failure, you should press the nipple that provides access to the membrane. If you can hear air oozing from it, then everything is in order. If water flows from it, then the serviceability must be corrected by replacing the hydraulic accumulator.

The accumulator volume is too small. When choosing a pumping station for a country house, many want to save money by choosing a small-volume hydraulic accumulator (24 liters or less). Such a volume will be very small, since the hydraulic tank ultimately collects only 50 percent of the water of its total volume. Thus, in a tank with a volume of 24 liters there will be a total of about 7 to 12 liters of water, which is quickly consumed. As a result, the pump has to turn on frequently. To eliminate this, it is recommended to additionally install another hydraulic accumulator.

Incorrect pressure switch setting. The difference between the pressure value at which the pump turns on and off just needs to be made larger. Moreover, it is important that the pressure value at which the pump will turn on must be set to 0.2 atmospheres less than the pressure value in the accumulator. The pressure in the accumulator is checked by connecting a pressure gauge to the nipple. The optimal pressure is 1-1.5 atmospheres. If necessary, it must be vented or inflated using a pump, for example, a car pump.

The check valve is clogged. If the valve does not work and water leaves the system, the pressure decreases and the pump turns on every 10-20 minutes. Often simply cleaning the valve is enough, but sometimes it needs to be replaced.
Damage to the spool, which is located in the upper part of the accumulator. Eliminated by replacing the nipple.
Leaky pipeline or connections. As a result, air enters the system and water flows out of it.
The pump pumps water along with air. This happens due to a decrease in the water surface. This problem must be solved by lowering the pump or pipe lower.
Malfunction of the plug, socket, cord, burnt or oxidized contacts in the place where the electrical cable is attached to the motor.

The pumping station does not turn off: Lack of water in the source, the so-called “dry running”. This malfunction can lead to the pump burning out, since it is not cooled by the pumped water. To prevent this breakdown, it is best to use sensors that indicate the water level. They are electric or float.
The suction line resistance value is too high. Most often this happens if the length of the line is too long or the diameter of the pipes is too small. To check, immerse the suction pipe in a container of water next to the pump. In the case of a normal rise in pressure, you need to look for the cause in the route. For example, lay pipes with a large diameter, lay the main in a straight line, minimizing the number of bends and connections.

Air leaks into the line occur due to poor connections (leaky). Detected by observing the pressure gauge after the station is in the off state. If the pressure does not decrease, then everything is in order with the system in terms of tightness, but if it decreases, then you need to look for a leak in the system.
The check valve or filter on the pipe is not working. They need to be removed, cleaned and reinstalled.
Faulty pressure switch. Sometimes the pump cannot reach the required pressure because the pressure value at which the pump turns off is too high. In this case, it is enough to adjust the shutdown limit. The relay contacts may also fail. In this case, a dark coating forms on them, which is cleaned off with sandpaper. The pressure switch may stop working due to salt deposited on the adjustment springs or a clogged inlet.
The impeller has worn out. This often happens if the pressure value at which the pump turns off is set much less than the maximum pressure. In this case, it is often enough to simply replace the impeller.
Low voltage in the network. In this case, it happens that the pump works, but the pressure switch stops. The solution may be a voltage stabilizer.

The motor runs, but no water flows:

The impeller does not rotate. This may be due to either low mains voltage or a burnt-out capacitor in the terminal block. The latter is checked using a tester.
There is no water in the borehole or well.
The filter or check valve is clogged.
The impeller is jammed. In this case, you can try to turn the shaft by hand, which may become covered with salts. If you are unable to turn it manually, then you should remove the protective cover and unlock the impeller.
The pump does not draw water. The cause of this breakdown may be the lack of optimal pressure in it.
The water supply is uneven. It happens that the pump works stably, but the water flows in uneven volumes. The main cause of this malfunction is air in the pipeline. To eliminate this, it is advisable to check the water level in the well or borehole and, if necessary, adjust the position of the water intake hose.

How to fix?

Repairing a pumping station with your own hands is a completely doable procedure. However, we must remember that before eliminating the malfunction and resuming normal water supply, you should drain all the water and also disconnect all elements, including the expansion tank, pressure gauge, pressure switch, and so on. If the engine does not work, the first thing to start with is checking the supply voltage. Then it doesn’t hurt to check the entire electrical connection circuit of the station. This can also happen due to contamination of the pump, which means it should be disassembled and cleaned. In this case, it is advisable to install an additional filter. If the fuse fails, it must be replaced. The fan impeller should rotate freely. If not, then the engine is seized. In this case, the engine cannot be started until the problem is resolved.

It is worth checking the contacts of the pressure switch. It would also be a good idea to check the terminal capacitor. If there is no water in the device, then you just need to pour it in and reduce the suction height if it is no more than 7 meters. Make sure that there is no leakage in the suction pipeline and clean the check valve. Next, you need to adjust the voltage stability, reduce the resistance in the pressure pipe, clean the pipe line, or lay a new one along a more straight path (without sharp bends).

If the engine is running but does not supply water, you need to:

check the water level for intake;
eliminate air leaks into the pipeline;
clean the supply part of the pipeline;
pour water into the system to remove the air lock;
eliminate the reasons why equipment runs dry.

Insufficient water supply is corrected as follows:

clean the pump and pipeline;
eliminate pipeline leaks;
remove the slightest air leak in the suction section of the pipeline;
In case of significant corrosion, replace the suction section of the pipeline.

If excessively frequent switching on/off of the pumping station occurs, then you need to:

Replace the damaged accumulator diaphragm or hydraulic tank.
If the compressed air pressure is low or there is no compressed air in the tank at all, then the tank may have suffered damage due to corrosion. You should remove it, and then pump air into the tank to the required pressure according to the pressure gauge.
A foreign object has blocked the check valve and it cannot close. In this case, it is necessary to take steps to unlock the valve.

The pumping station does not provide normal pressure:

The pressure switch is set to too low values and needs to be adjusted.
The pressure switch inlet is clogged and needs to be cleaned.
If the supply pipeline or working part of the pump is blocked, the power should be turned off. Then clean the pipeline and pump.
If there is air in the pipeline, check the tightness of the connections; it is advisable to make as few connections and bends as possible.

If the pumping station is running but does not turn off, then the pressure switch is set to a very high value and needs to be adjusted.

Manufacturers and reviews

On the market you can find pumping stations from various manufacturers. Of course, they all have their own characteristics. However, when choosing, you should rely on real reviews from users. For example, pumping stations Pedrollo They are distinguished by their beautiful appearance, high performance and low heating if used for a long time. But among the shortcomings it is worth noting low-quality rubber, the taste of which can sometimes even be felt. The automation also did not perform well, as did the cast iron body.

Stations Espa They work great for the first 2.5-3 years. The pumping stations of this manufacturer do not have any obvious disadvantages. Practice shows that for domestic use the devices show themselves to be of high quality and reliable. The only thing they need is the correct conditions of use (humidity, temperature, etc.). Unipump pumping stations fully comply with the stated characteristics and are practical to use. They are great for country houses, as they are easy to use and fully automated. Rarely do minor breakdowns occur over several years of use.