What can be cooked from squid: fast and tasty

A country dweller is well aware of the property inherent in submersible pumps to refuse to pump water at the most inopportune moment. It’s good if there is a spare or the owner prudently installed a head with a lifting gate on the well. Otherwise, you can live to the point that you have to go with buckets to the nearest pump and temporarily limit water consumption.

The breakdown may lie on the surface, and its elimination will take several minutes. It is impossible to discard the extreme situation, when resuscitation is impossible or irrational, even with the involvement of specialists. Similar conclusions can be drawn independently. Submersible pumps suffer from the same disadvantages. It will not be difficult to find the cause of the failure by the elimination method.

The pump is buzzing, but the water does not pump

In the same case, a weak water supply should be attributed. Possible cause malfunctions can be:

loosening the stem nuts above the shock absorber. With vibratory pumps, this happens often. It is required to disassemble the case and tighten the fasteners. Lock the top nut. The complexity of the repair is associated with corrosion of the screw connection of the housing. In this case, it should be approached radically: with a chisel, a hacksaw or a grinder, cut off the fasteners. Subsequently, to connect the halves of the outer shell, use a bolted connection;
valve failure. The most common cause of pump failure and just as easy to fix, unless, of course, there is a repair kit. The cost is cheap, but the speed of troubleshooting depends on its availability. It is easy to establish such a reason. It is necessary to alternately strongly blow into the intake and supply pipes. If the air in both cases passes easily, the cause is established;
stem break. Preliminary diagnosis why it does not pump submersible pump can be given if shaken. Springs, washers and bushing, in this case, get freedom of movement. Therefore, the noise characteristic of rattles will be observed. Finally, the malfunction is revealed during disassembly. Repair is possible at home.

There are signs of a short circuit

Knocking out plugs and charring the current-carrying cable says:

about the burnt armature winding. Despite the terrible voicing of the malfunction, the breakdown is easily eliminated by replacing the burnt element. When disassembling the pump, the reason will be clearly not only visible, but also tangible by smell;
cable failure. In some place, the insulation was broken. Finding such a site will be the most difficult in troubleshooting. It is enough to impose additional insulation on the damaged area.

Strong vibration combined with overheating

As a rule, there is only one reason for this - the exfoliation of the compound, which is poured into the electromagnet to fix it in the housing. At the same time, it plays the role of a heat sink and insulating material. To fix the problem, you must contact a specialized organization. Compared to buying a new submersible pump, this will cost about half the price.

Low pressure

Indicates insufficient clearance between coil and armature. Within a second, the rod makes 100 translational movements. If their amplitude is small, the vibrations of the membrane are damped, and the efficiency of the pump drops. Washers are added experimentally to eliminate the breakdown.

Advice: to do all this, you should have another pump in stock and take care of the repair kit.

Submersible pumps have to work in difficult conditions. They are constantly exposed to water, vibration, low temperature, abrasive particles, etc. But despite the fact that the units are made of parts with a large margin of safety, various malfunctions appear in them over time. To repair water pumps with your own hands, you need to familiarize yourself with the main symptoms that indicate certain breakdowns in the equipment.

If failures are noticed in the operation of a submersible pump, then it is not always necessary to remove it from the well for inspection. This recommendation only applies to pumping stations where pressure switch installed. It is because of him that the device may not turn on, turn off or create poor water pressure. Therefore, the operability of the pressure sensor is first checked, and after that, if necessary, the pump is removed from the well.

Important! In the case of submersible pumps operating without hydraulic accumulators, they should always be removed from the shaft at the slightest sign of failure.

Water pump malfunctions will be easier to diagnose if you first familiarize yourself with the most common failures of this unit.

The pump is not working

The reasons that the pump does not work may be as follows.

Electrical protection tripped. In this case, disconnect the machine from the mains and turn on the machine again. If it knocks it out again, then the problem should not be sought in the pumping equipment. But when the machine is turned on normally, do not turn the pump on again, you must first find the reason why the protection worked.
Fuses blown. If, after replacement, they burn out again, then you need to look for the cause in the power cable of the unit or in the place where it is connected to the mains.
Cable damage has occurred under water. Remove the device and check the cord.
The pump dry-run protection has tripped.". Before starting the machine, make sure that it is immersed in the liquid to the required depth.

Also, the reason that the device does not turn on may lie in the incorrect operation of the pressure switch installed in the pumping station. The start pressure of the pump motor needs to be adjusted.

The pump works but does not pump

There may also be several reasons why the device does not pump water.

Shut-off valve closed. Turn off the machine and slowly open the tap. In the future, pumping equipment should not be started with the valve closed, otherwise it will fail.
The water level in the well has dropped below the pump. It is necessary to calculate the dynamic water level and immerse the device to the required depth.
Zalip check valve . In this case, it is required to disassemble the valve and clean it, if necessary, replace it with a new one.
Inlet filter clogged. To clean the filter, the hydraulic machine is removed and the filter mesh is cleaned and washed.

Low machine performance

Advice! If the performance of pumping equipment drops, the mains voltage should be checked first. It is because of its reduced value that the engine of the unit cannot gain the necessary power.

Also, performance degradation causes:

partial clogging of valves and valves installed in the water supply system;
partially clogged lifting pipe of the apparatus;
pipeline depressurization;
incorrect adjustment of the pressure switch (applies to pumping stations).

Frequent switching on and off of the device

This problem occurs if the submersible pump works in tandem with a hydraulic accumulator. In this case, frequent starts and stops of the unit can be provoked by the following factors:

in the hydraulic tank there was a decrease in pressure below the minimum (by default it should be 1.5 bar);
there was a rupture of a rubber pear or diaphragm in the tank;
the pressure switch is not working properly.

Water is supplied with pulsation

If you notice that the water from the tap does not flow in a constant stream, then this is a sign that the water level in the well has dropped below dynamic. It is necessary to lower the pump deeper if the distance to the bottom of the shaft allows this.

The buzz of the machine is heard, but the water does not pump

If the pump is buzzing, and at the same time water is not pumped out of the well, then there may be several reasons:

there was a “gluing” of the impeller of the apparatus with its body due to long-term storage of the device without water;
defective engine start capacitor;
dipped voltage in the network;
the impeller of the pump is jammed due to dirt collected in the body of the apparatus.

The unit does not turn off

If the automation does not work, the pump will work without stopping, even if excessive pressure is created in the hydraulic tank (seen from the pressure gauge). It's all to blame pressure switch out of order or incorrectly adjusted.

The nuances of breakdowns depending on the brand of the pump

When operating pumps from different manufacturers, it was noticed that some brands of devices are often subject to the same breakdowns. It follows from this that these models of aggregates have their own distinctive features in terms of faults.

Aquarius

Aquarius pumps have prone to overheating, especially if they work in wells of small depth. If a cheap model breaks down, its repair costs about 50% of the cost of a new device. If the device is out of order, then it is easier to throw it away than to repair it.

Grundfos

Most models of this manufacturer have valve system. Also around the engine there is a special thermal insulation. Sometimes pump failures occur due to the failure of the listed parts. Because the thermal pad is around the motor, it will need to be removed from the housing for repair.

Baby

Apparatuses "Kid" are products of domestic manufacturers. The cost of repairing units of this brand is not high, and most of the breakdowns are repaired by the owners of the devices themselves. The main failure often encountered in this pump is loud noise during operation of the hydraulic machine without pumping out the liquid. This behavior of the device means that there was a rupture of the central axis holding the anchor and the membrane.

Gilex

The engine in the vortex and rotary pumps "Dzhileks" is oil-filled. Therefore, a frequent breakdown of these units is oil leakage from the engine. It can only be topped up at a service center.

Important! Many on the Internet advise using transformer oil or regular glycerin instead of the original oil filler. Doing this is highly discouraged, of course, if you have not set a goal in an unusual way ruin the technique.

Brook

There is an opinion that the operation of the drainage pumps "Brook" can continue without interruption for 7 hours or more. This is explained by the peculiarity of their design, which meets all European standards. Despite this, the device overheated as well as pumps from other manufacturers. Therefore, it is recommended that after every 2-3 hours of operation of the device, give it time to “rest”.

Marquis (Marcus)

The owners of the Marcus well pump sometimes notice that the device turns on only after a slight blow either on the pipe leading to it, or after hitting the hydraulic machine itself. This error is explained by “ souring” of the impeller, which will have to be cleaned by disassembling the unit.

How to disassemble the unit to diagnose a breakdown

In case of pump breakdowns requiring replacement of parts located inside its housing, disassembly of the unit will be required. A submersible pump consists of a motor compartment and a compartment with one or more impellers, the purpose of which is to capture water. Below is a diagram of the device of that part centrifugal pump where the impellers are installed.

As can be seen from the figure, the impellers are mounted on the shaft of the unit. The more of them, the higher the pressure created by the pump. In the second compartment of the hydraulic machine is located rotary engine. It is in a sealed case, and to open it, you need to know some of the nuances.

So, in order to move from theory to practice and disassemble the pump, follow these steps (depending on the manufacturer, the design of the unit may differ).

Unscrew the 2 screws holding the mesh of the device.
Remove the mesh and turn the motor shaft by hand. If it does not spin, then the problem may be either in the engine compartment or in the pumping part of the apparatus.
First you need to disassemble the pumping part of the device. Unscrew the 4 screws holding the power cable channel and disconnect it from the machine body.
Next, unscrew the 4 nuts holding the pump flange.
After unscrewing the fasteners, separate the pumping part of the apparatus from the engine. At this stage, it is possible to determine in which section the jamming occurred. If the shaft of the pump compartment does not rotate, then this assembly must be disassembled.
Unscrew all fasteners holding the lower flange of the pump part of the unit.
An adapter must be screwed into the fitting located at the top of the block, which will help keep the threads from damage.
Secure the pump in a vise.
Having picked up a suitable tool, unscrew the bottom flange.
The impeller assembly can now be pulled out and inspected for faults.
Next, you should check the support shaft for wear or play.
To replace (if necessary) the impellers, it is necessary to fix the shaft in a vice and unscrew the top nut.
At the next stage, the blocks are removed, washed and, if necessary, replaced with new ones.
The assembly of the pumping part of the apparatus is carried out in the reverse order.
To disassemble the electric motor, it must also be fixed in a vise.
Next, remove the plastic flange protection by unscrewing the fasteners.
Remove the retaining ring holding the cover with a pair of pliers.
Remove the cover using a slotted screwdriver.
Remove the rubber membrane from the housing.
Remove the capacitor.
At this stage, you can check the oil level, its quality, identify the cause of jamming, etc. The engine block is assembled in the reverse order.

Replacement and repair of defective parts

Now that you know how the hydraulic machine is disassembled, you can try to repair the submersible pump with your own hands.

Basically, the blocking of the impellers occurs due to filling them with sand or due to the formation of dirt deposits on them. In addition, the impellers can be soldered together when high temperature in the unit when the pump is idling (dry running). To repair this section of the unit, the impeller(s) must be removed and accumulated dirt removed. If the impellers are damaged, they will need to be replaced with new ones.

Engine

Self-repair of the pump motor is not recommended, since the diagnosis of this unit and subsequent repair require special knowledge and the necessary equipment.

In some models of pumps, in order to remove the motor, it will be necessary to press it out using special equipment. Oil seal and bearing replacement also carried out in the service center.

If a engine hums and won't start then check the capacitor. It is located in the pump block in which the motor is installed.

Advice! Before disassembling the engine block, try to rotate its shaft with the pump block disconnected. If the shaft rotates, then the reason may lie in the jamming of the impellers.

But when the impeller shaft rotates without problems, then in order to remove the hum in the water pump, you should disconnect the capacitor and change it to a new one. Of course it's better check this part with a multimeter, since similar symptoms can be caused by a short circuit in the motor windings.

The water pump engine is located in a special glass filled with oil, and by its condition it is possible to determine some breakdowns in the electric motor unit.

The oil has a characteristic, unpleasant odor. This means that the engine is still in working condition, but it worked with large overloads.
cloudy oil- water has entered the motor housing due to a crack in the housing or failure of the stuffing box (cuff).
Black oil with an unpleasant odor. In this case, we can say with great certainty that the varnish on the engine coils burned.

Important! Normally, the oil should be clear. Its quantity is determined by the model of the unit. On average, the volume of oil poured into the chamber is at the level of 0.5 liters.

If, when opening the engine, the above changes in oil quality were noticed, then you first need to repair this unit, and only after that fill in new grease.

What is the phenomenon of cavitation

Everyone knows what is dissolved in water some gases. When a liquid moves at a certain speed, rarefaction zones sometimes form in it. In these zones of low pressure, gas bubbles begin to emerge from the water. After bubbles enter the zone high pressure they collapse. This process occurs with the release of a large amount of energy, from which the impellers and the pump snail are destroyed. The following photo shows the impeller of the unit, destroyed by cavitation.

The energy of collapsing bubbles can create shock waves causing vibration. It spreads throughout the unit and affects not only the impeller, but also the bearings, shaft and seals, from which these parts quickly become unusable.

The cavitation effect is most often observed in pumping stations that work for suction. In such systems, the impeller creates a vacuum, due to which water rises through the hose from the well. But if there is a lack of liquid at the inlet to the pump, then an excessive vacuum occurs in the impeller zone, provoking the occurrence of cavitation.

Important! The most obvious signs of cavitation are the vibration of the pipes and the pump itself, as well as increased noise during its operation. If no corrective action is taken this process, then it can completely destroy the station.

To prevent cavitation in the pumps, the rule should be followed: there should be more water at the inlet than at the outlet. This can be achieved in several ways:

move the device a little closer to the source;
you can increase the diameter of the suction pipe (hose);
to reduce the resistance in the suction section, the suction pipe can be replaced with a pipe made of a smoother material;
if there are many turns on the suction pipe, then, if possible, their number should be reduced;
it is desirable that all bends have large turning radii.

Advice! Do not lower the suction hose of the station into the well to a depth of more than 8 meters. Typically, the maximum immersion depth of the hose (pipe) is indicated in the equipment manual.

Repair of drainage pumps is very important decision problems for long-term operation of devices in good condition. It is no secret that this unit is not replaceable for its plots during the period of snow melting or heavy rains, when excess water can do a lot of damage to buildings, flooding basements or washing away the foundation of a house.
With the help of a drainage pump, water can be pumped out of a pool or a pit, or from any reservoir. How to repair a drainage pump with your own hands offers to get acquainted with this article.

What are the types of drainage pumps

According to their purpose, such pumps for pumping out dirty liquids are divided into:

. This type of device is used for pumping liquid from small tanks.
The unit is installed on the ground, at the edge drain pit. To pump out waste, a hose is lowered to the bottom of the tank.
When the pump is operating in automatic mode, it is necessary to bring the float mechanism to the activation lever, it will monitor the water level in the tank or pit. When effluents rise above a certain level, the float rises with them and turns on the equipment.

Such a device should have two pipes:

entrance, for sucking water from the waste pit;
outlet, through which the liquid is discharged outside of it.

During operation, it is necessary to ensure that water does not get into the engine, which can lead to damage to the device. Therefore, the pumping of sewage must be carried out faster than their level in the pit can rise.

Tip: Pumps are brought to the sewer system through nozzles. In this case, when installing the unit, it is necessary that the diameter sewer pipe was known quite accurately, down to the millimeter.

The main advantage of surface drainage devices is their mobility. The device can be easily moved to any place, and if necessary, it can be repaired quickly and easily.

. Such models are most often used to clean deep tanks and large-scale flooding, to eliminate excess water. In this case, the units are lowered into a container or pit, from where it is necessary to pump out the liquid, and suction water is coming through the holes located in their bottom, and not through the inlet hoses for the drain pumps.
Mesh filters of the devices protect it from stones and other large particles entering the pump impeller.

The use of a float or a plastic bubble allows, with a certain amount of wastewater, to automatically turn on the submersible pump. To prevent a possible short circuit, when the device is immersed in a liquid, manufacturers have provided high-quality electrical insulation.
The undeniable advantages of drainage pumping equipment for liquids are:

Versatility.
Long service life.
No mandatory regular maintenance is required.

If it is necessary to pump out or pump a heavily contaminated liquid, it is better to prefer sewage or fecal pumps. They have a special cutting or chopping tool and can pump and process liquids containing large household waste.

Tip: In this case, it is better to use an automatic sewer station that allows you to put into operation bathrooms that do not have a connection to public sewers.

The device and principle of operation of drainage pumps

The main elements of the drainage pump are:

Engine. If the price of the pump is small, the motor is located in an inner casing made of plastic.
A capacitor motor with a thermal cut-out that prevents overload is available on more expensive retrofit units. Here:

housings are made of high-strength polypropylene, reinforced with fiberglass; it is possible to manufacture the pump housing from of stainless steel or plastic, and stainless steel is taken for the motor housing and shaft;
the working shaft is made of stainless steel.

Housing internal.
The body is external.
or impeller, are located on the shaft in the outer casing of the pump. The wheel configuration determines how large dirt particles can pass the pumps.

When the pump is running, the space between the housings is filled with water, forming a cooling “jacket”, which protects the unit from overheating.

For automatic shutdown and start-up, the pumps are equipped with float switches that control the water level in the tank, protect the device from dry running and flooding, and monitor the timely switching on of the pump.

Quality and long pump life performance can be obtained if the content of fibrous inclusions is kept to a minimum and the size of the solid particles does not exceed 5 mm. The smaller the installation depth, the better.

Tip: Running Drain Pumps at Higher Temperatures Wastewater, is limited to a certain time, which is indicated by the operating instructions. This is due to the fact that the cooling of the engine occurs when heat is transferred to the liquid that is pumped.

What are the criteria for selecting drainage pumps

There are several rules that must be observed when choosing a unit:

Consider the type of liquid being pumped. Determine what particle size he can pump without problems.
To study the main parameters of the drainage pump, which will help you choose the most suitable model. These values include:

head. This value for a product of average productivity is about 7 to 10 meters. In high-pressure models, a pressure of more than 30 meters can be achieved. The pressure indicators of the device will depend on the distance over which the liquid will be supplied;
performance. For example, for a tank with a volume of 40 m3, a device with a capacity of up to 10 m3/hour is sufficient. To use the units for industrial purposes, you will need models with a capacity of 100 m3 / h and even more;
immersion depth of the pump. Its maximum value can vary from 5 to 15 meters, and the minimum is only from 0.3 to 0.9 meters.

Tip: Be sure when the unit is operating, its pumping part must be located under water.

A general view of the drainage pump is shown in the photo.

The service life of the device is directly affected by:

The quality of the material used for the manufacture of device elements.
The temperature of the pumped liquid. It should not exceed +50°C.
Nominal diameter. This indicator affects the amount of suspensions and solid particles in the liquid.
Existence of protection against an overheat. Most often, two devices are built into the models at once:

float switch, needed to prevent motor overheating;
thermostat, turns off the power when the water level reaches a critical point.

Repair of submersible pumps

Sometimes a situation arises when repairs are needed. In this case, you must first find out the cause of the breakdown.
Most often these can be:

Improper operation of the equipment - exceeding the operating parameters of the device.
Long period between maintenance.
Operation of the unit in "dry". If used for a long time in this mode, the pump may fail.
Too large solids in liquids to be pumped out.
Poor quality equipment installation.

Faulty: relay, accumulator, filter missing, other manufacturing defects.

All these reasons can lead to rapid wear and tear of the device.
If the cost of the unit is too high, then it can be repaired drainage pump with their own hands, but only to those who have the skills to handle such units.
When the first signs of malfunction of the submersible pump appear, it is necessary to check the condition and performance of the following elements:

The piston must be elastic, its shape must not show any deformation or any mechanical damage.
When air is blown in on the fluid intake side, it must flow freely on both sides.
Between piston and electromagnet coils optimal distance it should be from 0.4 to 0.5 cm. with a larger gap, the coil will beat, with a smaller one, the motor will overheat.
Between the valve that closes the inlets and the housing, the gap should be from 0.7 to 0.8 mm.

Tip: Very often, the poor performance of equipment is caused by the failure of any elements, but by a voltage drop in the mains. Therefore, before starting disassembly and starting self repair submersible pumps, you must first check the voltage in the network, it must be 200-240V. If everything is fine here, you can start disassembling, having previously made special serifs on the joined sections of the device.

How to independently repair the drainage pump shows in detail the video in this article. Only timely troubleshooting of the unit will allow it to operate for a long time without any problems.

A drainage pump in a suburban area is a kind of lifesaver in case of unforeseen situations. By design, it resembles equipment for supplying drinking water, but it has the ability to move contaminated media with large inclusions.

But like any other technique, equipment can fail. Let's try to understand the weaknesses of the unit and find out if it is possible to repair the drainage pump with our own hands if necessary.

The ability to pump water with fine gravel, large inclusions of sand, organic residues is a very useful quality when you need to pump out water after flooding or drain a pond. Drainage units are designed to work in such conditions, but exceeding the load often leads to breakdowns.

It is better to get acquainted with the internal content of the device immediately after purchase in order to imagine what parts can fail in the event of clogging or breakage. To do this, it is not necessary to open the case or disassemble it - just study the diagram that is attached to the instructions for connecting and servicing the device.

The suction port of the pump unit can have a different location: for submersible models, it is located at the bottom and is equipped with a filter mesh

Devices for private use on summer cottages do not differ in high power or complex filling. Unlike heavy industrial equipment, they are compact, relatively light (average weight - 3-7 kg), consist of steel or plastic parts, although cast iron is still used for the production of industrial models and some household ones.

The main components of the submersible mechanism are a pumping unit that pumps water and an electric motor that rotates a shaft with blades. The motor is housed inside a robust case, which is made of stainless steel or reinforced polypropylene and is double. Water circulates between the outer and inner walls, preventing cooling.

Image gallery

Modern models are equipped with thermal protection, which is triggered when the device is overloaded. An impeller is attached to the axial shaft - a screw device that supplies liquid to the inside of the housing. When the unit is turned on, the impeller begins to rotate, taking in water from the outside and pushing it along the walls to the outlet. The first portion of water is replaced by the next one - and so on until the mechanism stops.

Regulates the frequency of work. It monitors the liquid level in a reservoir or natural reservoir, and when it drops sharply, it turns off the device automatically.

Diagram explaining the principle of operation float switch: the float, due to the action of physical laws, rests on the surface of the water, which descends during the pumping process along with it. When the lower limit is reached, the float gives a command to turn off the unit

Faults and solutions

There are a number of options for do-it-yourself equipment repair, provided that the broken part can be replaced with a new one or a simple technical procedure (such as cleaning) can be carried out. To do this, you will have to disassemble the case, diagnose, identify the problem and select an identical part.

If you rarely use drainage equipment or plan to use it only in case of an accident (flooding), then do not rush to buy an expensive pump - a cheap model is much easier to replace. Caliber pumps - from 2500 rubles

Available actions include replacing the condenser, impeller or float, repairing the electrical cable, fixing the shock absorber, removing large pieces of clay and sand stuck inside the case.

If the cast-iron housing is cracked, the valve is out of order, or the winding has stopped functioning, you should contact service center or think about. Inexpensive Chinese-made drainage devices are inexpensive, so ordering a serious professional repair is impractical.

Breakdown # 1 - the power cord is out of order

A flexible element - a cable - is always at risk, because due to regular twists and kinks (which often happens during transportation and reinstallation of equipment), the wires under a layer of plastic or rubberized protection are broken, as a result of which the power to the pump stops.

It is necessary to find the place of the break and make the connection. This operation is easy to carry out if a break occurs near the plug - you just need to strip and connect the wires, finally carefully isolating the place of work.

When removing the cable, try to mark and remember the attachment points of each wire (it different color), so that during reverse installation not to confuse the “phase”, “ground”, “zero”

A cable break in the connection area to the pump requires more time to repair. First you need to remove the equipment from the water, wipe and dry it, then disassemble it to get to indoor unit connections. Get ready for the fact that instead of hexagonal holes you will encounter triple ones, which will make it difficult to select a screwdriver.

The cover should be removed carefully, without jerks and efforts. By unscrewing the bolts holding the tensioner, you can view the cable and determine the breakage area. We remove the worn piece, mount the cable in its original place, fasten the tension element, fix the bolts.

Breakdown #2 - water supply stopped

The engine is working properly, but the liquid has either stopped flowing altogether, or comes in small uneven jerks.

There may be several reasons for this strange phenomenon:

Part of the supply line is clogged. This is the outlet pipe or supply pipe. A kind of blockage arose from bunches of algae and pieces of clay. It is necessary to disconnect the pipes and clean them. It is possible that the pipe length is longer than recommended by the manufacturer, and therefore there is not enough pressure to deliver the required power.
The impeller is worn out. Bent or damaged blades. You should disassemble the device, replace parts, first visually (as far as possible) determining the cause of the malfunction.
The fluid is saturated with dirt and debris. Therefore, the water has a thick consistency and is difficult to pump. We solve the problem by raising the suction hole to a certain distance from the bottom, where sediment accumulates.
Engine power has noticeably decreased. What can be determined even by the sound. Possible malfunctions in the supply of electricity, failure of bearings, depressurization of the oil compartment. It is necessary to disassemble the case in order to clarify the cause of the breakdown and replace worn parts.

The most common problem is filter clogging. To clean the screen and the suction hole, you can try running some clean water through the pump. If this procedure does not help, you should disassemble the case and clean all the chambers, removing pebbles, algae and wood chips.

When disassembling, you may encounter an unpleasant "surprise" - the fusion of rusted mounting bolts with the body. The bolt heads must be carefully cut off with a grinder, and new screws should be installed in place of the old fasteners.

When disassembling the unit, be sure to use the manufacturer's diagrams or instructions. They will help to consistently remove parts, quickly find the places where the bolts are fastened. In some cases, worn fasteners or loose nuts cause parts to move, which also affects machine performance.

Breakdown # 3 - the engine does not start

You connect the power supply - and the pump does not work, makes no noise and does not pump water. Get ready for the fact that you have to examine all the equipment.

Here are the most common causes of engine failure:

Power failure due to broken wires. We check the cable to the touch and find the place of the break. If the emergency section is in the area of connection to the pump, we act as described above.
The stator winding has failed. Happens due to running dry. If you cannot replace it yourself, contact a specialist.
Stuck bearing. We check the part for suitability, according to the results of the diagnostics, we clean or change it.
The suction device is clogged with debris. We clean the blades and grating, check the integrity operating elements and grids.
The float switch is broken. To check its performance, it is necessary to close the relay. Perhaps the problem is in the wire connecting the float to the pump.

If the capacitor fails, it needs to be replaced. In some models, special access is provided to it, which is a separate hole in the case.

Breakdown # 4 - the pump turns off on its own

When the pump is connected to the network, it starts to work, however, after a while, it spontaneously stops. Most likely, the protective mechanism is triggered due to engine overheating.

Perhaps the cause is a heating cable. It is worth checking the compliance of the mains voltage and the parameters set by the manufacturer. If the data does not match, you need to purchase a stabilizer.

The cause of overheating or spontaneous shutdown may be the oxidation of wires that need to be cut or replaced. The problem becomes apparent after a complete check of the remaining parts of the pump

Shutdown can also occur due to clogging of the blades with debris. In this case, we recommend that you perform a complete cleaning procedure, that is, open the housing, clean the internal chambers and the impeller, check the filter.

If blockages occur quite often, re-read the instructions for the product to clarify the size of the fractions. It is possible that the pump is not designed for pumping liquid with large particles of debris - only a fecal pump is suitable for grinding

Breakdown # 5 - turning on the pump knocks out the electrician

When the pump is turned on, plugs fly out into the network or wires burn out. The reason should be sought in the details that are directly responsible for the wiring of electricity - the cable or the stator winding. The serviceability of the wires can be checked with a tester, if a worn section is found, the entire cable should be replaced or (if the break is near the end) shorten it.

Winding repair is a time-consuming task and requires special knowledge. Even with a carefully carried out secondary winding, a short circuit is not ruled out. If you have no time to mess with a burned-out part, take the device to a service center - perhaps after the diagnosis they will advise you to buy a new pump.

If you decide to repair the winding yourself, try to take into account all the parameters - from the number of turns to the thickness and brand of wire

Preventive measures and regular maintenance

As you can see, the cause of wear of parts can be both inevitable wear and violation of the rules for operating the equipment. To make the device last longer, try to follow the manufacturer's recommendations. For example, position the housing so that the suction device is at a certain distance from the base of the tank and does not capture coarse particles.

At least once a year, check the condition of the cable and internal parts dismantling the body as much as possible. Perform preventive cleaning, which will increase the life of parts several times. Do not confuse drainage device with fecal - it does not have a special grinder and cannot cope with the movement of large inclusions.

Conclusions and useful video on the topic

Videos from craftsmen will help you properly organize the disassembly of pumps of various brands and troubleshoot them yourself.

Stator overheating due to violation of interval operation:

Pedrollo Pump Repair Features:

If after studying our material you still have questions, or you have encountered a breakdown of the drainage pump and know how to get out of this situation, please leave a comment. We are very interested to know your opinion.

As sad statistics show, in 98% of cases the drainage pump fails due to the fault of the user. Factory marriage, of course, also sometimes occurs, but extremely rarely. The fault of many is that they read the instruction manual, mainly when the pump is no longer working.

All types of complaints when contacting service companies and workshops can be divided into 4 groups:

all pumps are bad;
we used it right, but it burned out;
there was a circuit breaker (UPS, RCD, etc.), but it burned down;
thermal protection is indicated in the document, but it burned out.

1. Oddly enough, it sounds, but in the vast majority of cases, the reason for the failure of the unit is operation without water or liquid. Even if you have a high-quality Aquarius pump (it ranks first among domestic products), but the work is idling, the engine eventually overheats,. Even if there is thermal protection of the motor against overheating, the winding burns out during repeated dry operation.

2. When buying a three-phase pump, you need to understand how to check the voltage of each phase and control the risk of breaking. If at least one phase breaks, the motor winding burns out within a few seconds. The same can be said about the wrong connection, when initially some phase does not work. Moreover, there is practically no opportunity to prevent combustion, the count really goes on for seconds.

3. The fecal pump often fails when large insoluble objects enter the sewer. When disassembling the pump, you can find rags, laces, tights on the impellers, even belts and things sometimes came across. Drainage pumps are designed to work with garbage of different fractions, but protection is simply not provided against such items.

If there is no check valve, this is also a guaranteed breakdown of the working shaft. The fact is that when draining water, the wheel accelerates and turns in one direction, and when pumping out, in the other. If at the same time the unit releases water and receives a command to pump out, the shaft simply breaks out.

4. Violation of the operating range often leads to breakdowns. It is impossible to overload the equipment, but it is also forbidden to force it to work at half strength. This is especially true for circulation pumps in the heating system.

5. Frequent switching on / off also significantly reduces the resources of the unit. In the absence of a frequency converter, the operation of such a pump will not exceed 12 months. Such problems are typical for private houses where a small accumulator is installed. To replenish the pump, you have to constantly turn on, work with increased current, which leads to rapid wear. It is enough to put the accumulator 2-3 times more so that this problem is solved.

And finally, we note the main problem - pulling the submersible pump by the power cable (some even manage to pull the float). In this case, the tightness of the cable connection is broken, which leads to breakage. For the convenience of pulling the unit to the surface, you must initially tie a rope to it.