Do-it-yourself Zelmer coffee maker repair

The repair of Saeco coffee makers was discussed, they described what would break. The speech concerned coffee machines that can grind grain, dose, brew, pour into cups. The difference between the coffee maker is in its modest capabilities, there are plenty of designs. More often we find three on the counter: drip, espresso, capsule. There are quite large differences between them in the methods of cooking, the insides are similar. Each device has one 230 volt motor (for example, synchronous with a magnetized rotor) that drives the pump. More like a compressor, in some the piston goes back and forth. Creates high pressure (horn modifications). Consider how to repair a coffee maker with your own hands.

At the coffee maker, a container for water and a heating element form the basis, but there are further differences. The difference between a drip coffee maker and an espresso machine is described by the operating pressure. In the first case, boiling water simply drips onto the filter containing the poured coffee, the drink seeps further down, flows down, fills the cup. It is important to see the drop-stop function so as not to constantly collect moisture. In an espresso, a jet of water with a temperature of 95 degrees is thrown under pressure, forced through the tablet. To top it off, a special press drains the pomace. It turns out a dry squeezed coffee tablet. No additional filter needs to be installed. Coffee machines work on different principles, there are drip, espresso models.

Capsule coffee makers contain an infusion compartment with a needle, into which a plastic container of coffee powder is inserted. Brewing can be carried out under pressure or without. The first method differs from the second by the presence of a boiler in the design: water gains the required temperature, the compressor creates pressure. In the latter case, we often observe the possibility of obtaining milk froth. Stable bubbles are generated by the high temperature steam. The walls of the balls are cured by strong heat. One difference between brewing coffee and getting creamed:

Coffee is brewed with water of 95 degrees Celsius, to obtain steam, the heating elements work, reaching a threshold of 127 degrees. The modes are considered the best for traditional recipes.

Pay attention to the compressor: it allows you to brew coffee correctly, to get froth. The generated pressure is impressive, reaching 15 - 20 bar, more than is supplied to the heating system in the fall, checking during the period of technical measures. Managed to brew high quality coffee. In models of espresso (sometimes called carob), a special horn where coffee is applied. Then the structure is screwed onto the housing branch pipe, the handles are tightened with force. It turns out a dense tablet through which water is powerless to flow, having lost the circuit of a high-power compressor. It is possible to brew excellent coffee, not much different from the true drink obtained by the Turks according to generally accepted, traditional methods.

We describe in detail the device of a coffee maker, a variety of coffee makers, so that readers can imagine what is happening inside. Knowing the features of the functioning of the devices, it is easy to localize the breakdown. The main types of malfunctions will visit the mind automatically, the internal structure will become apparent.

We are writing the work of a drip coffee maker. Water is taken in by a container through a hose, pumped out by a pump. The flow heater delivers a fixed power, the pump speed is matched to the output temperature.Smart coffee makers have a sensor that monitors the parameters of the environment. By passing the pipe, the hot water reaches the upper compartment, which is equipped with a filter and contains ground coffee. The dosage is carried out according to the readings of the flow meter, or a temporary pump relay limits the duration of the heating element activation. Adjustment is possible. The spring timer works by feeding the pump through the spark extinguishing relay, or the electronic board monitors the flow meter readings, stopping the water supply at the right time.

In some cases, the temperature is not monitored at all. A portion is taken through a check valve. Then the heating element in a matter of seconds turns the liquid into steam, the jet rushes up the tube, filling the infusion compartment, and flows into the cup. The technique will not allow you to get true coffee, it is attractive for its simplicity of implementation. The coffee maker knows how many micro doses one cup can hold. The simplest manual counter controls the operation. The absence of water in the pipe for a new intake is controlled by a bimetallic plate. In the simplest case, the heating element immediately works on a volume of water equal to a standard cup of coffee.

The drip coffee maker has an hourglass-like shape; it is powerless to make cappuccino froth, latte. Self-repair of drip coffee makers is simple. Inside we will find:

• a heating element;
• water pump;
• control scheme.

There is an electronic filling of the microcircuits - there is a pulsed power supply unit that generates a constant voltage of the required rating (+5, +12 V). The efficiency is increased. To measure temperature, a bimetallic plate is used, which rarely breaks. The check valve can be easily checked by blowing in one direction or the other. The engine is running, controlled by a time relay (ordinary RC circuit), less often we see a flow meter, a level sensor. The pump rings, if the engine is collector, the action is repeated for the sections one by one.

Repair of a carob coffee maker seems to be the most difficult. There is not a pump - a compressor that pumps water under pressure into the boiler. The heater is located outside the tank. Outwardly, it resembles an iron: the heating element is bolted to the wall of a collapsible boiler. To regulate the temperature, there is a bimetallic plate, the sensor tension is adjusted with a screw for at least two positions. For brewing coffee, a temperature of 95 degrees Celsius is used, getting steam will require 127 degrees. Accordingly, the relay contact of the heating element opens at the right time. The boiler is durable, assembled in two halves, withstands a pressure of 20 atm without problems. The inlet is equipped with a check valve so that water does not go back during thermal expansion, heating.

The engine is made to dispense a fixed portion of water. The espresso maker is named after the coffee is poured into a long-handled cup. The tension design is put on the body, the coffee is rammed. Under the pressure generated by the pump, water fills the mug. Coffee makers are considered the best, experts say: carob models will allow you to take the maximum taste and aroma from the beans.

Inside the carob coffee makers, one motor belongs to the pump. Switching the path to steam supply is carried out manually. A collector motor is rarely used, the pump is relatively small, the point of fencing a garden disappears, there is a lot of noise. The pressure is generated by a piston (like a refrigeration compressor), which does not require much effort to develop. It is easier to save copper, use an induction motor. Brushes take up a lot of space. Carob-type coffee makers are equipped with power supplies for the engine and other elements.

Expensive models contain a motor compatible with inverter control. There are valves.A feature of the carob models is the presence of a boiler bypass valve. The pressure is dosed to ensure the correct brewing process.

Capsule coffee makers differ little from drip coffee makers. A small container containing coffee powder is installed inside, the piercing mechanism is manually clamped. After use, the capsule is ejected automatically, removed by the user of the device. Inside, the pump controls the flow of liquid, the instantaneous water heater raises the water temperature, reaching the set one. Sometimes there are no sensors, just the pump operates according to a timer. The water flow rate has been calculated in advance. It remains to substitute the cup. If water is not dosed correctly, we are looking for a power source for the pump motor. The timing circuit is faulty, no matter how the interval is set.

Do-it-yourself coffee maker repair does not depend too much on the model. Saeko, Gaggia, Nespresso, Rowenta, Spidem - they differ in details. Shape, arrangement of parts, types of sensors. The principle of operation remains the same everywhere. Repairing Jura coffee machines is similar to repairing Krups coffee machines.

Inspection begins along the cord along the power board, if any. The switching source is equipped with a cascade of filters, a diode bridge, and key transistors. Elements before and after the transformer are inspected for burnout, ringing. It's easier to immediately measure the output voltage of the circuit, then move on. It is easier to check the pump separately. Before that, look at the voltage rating required for the power supply in order to avoid an incident. In the event of a pump breakdown, the possibility of winding the stator coils is assessed. There is a chance to successfully complete the operation, you will not have to buy a new part.

Do-it-yourself coffee maker repair - problems, we disassemble it ourselves.

The coffee maker only prepares delicious coffee when it is working properly. Some operational problems may not affect the operation of the appliance itself, but will always affect the taste of the finished drink. There are a number of coffee maker malfunctions that you can fix yourself without contacting a service center.

How to start DIY repair

As with anything else, when repairing a coffee maker, it is important to first identify the problem. With regular use, the most unexpected failures are possible. Therefore, before eliminating the malfunction, the coffee maker must be disconnected from the mains, make sure that there is no hot water in the tank.

Possible manifestations of problems

Hot water, even if it is filtered, still leaves mineral deposits on the parts of the coffee maker. The more there are, the more this affects the taste of the finished drink. To get rid of this malfunction and prevent its occurrence, the device must be cleaned once a month. You can rinse the device with special descaling agents. Of the effective home remedies, experts recommend using acetic acid.

Important! Sometimes the taste of coffee does not change due to malfunctioning of the coffee maker, but due to improper storage of the product. Coffee must not be stored open or allowed to come into contact with other products. After all, grains perfectly absorb other tastes and odors.

It happens that very little water flows out of the device, or it does not flow at all. Most often this is due to a blockage in one of the tubes. Aluminum heating tubes are often clogged. To fix the problem, you need to pass vinegar through the coffee maker (do not put filters, coffee). Rinsing is done several times until the water is poured in the right amount. After cleaning, it is necessary to rinse the tubes several times with clean water (do not put filters, coffee in).

Too much or little coffee

Many modern appliances have a function to control the amount of brewed coffee. This is a useful feature, thanks to which you can not only brew yourself a cup of drink in the morning, but take some of it with you in a thermos. Therefore, if the function is available, you need to check its settings. Also check the amount of water in the tank. For correct settings, you can use the instructions for the device, where everything is described in detail.

Not hot enough coffee

The problem in this situation is related to the heating element. It will be necessary to find a spare part to replace the coil.This repair process involves interfering with the internal structure of the coffee maker. Therefore, if there are no skills for such work, it may not be worthwhile to engage in self-replacement.

How to disassemble a coffee maker yourself

When you are confident in your abilities, you can try to disassemble the coffee maker and fix it yourself. It is important to remember that before starting the process, the device must be disconnected from the mains. Do not open the device in case of any breakdown, otherwise, the final repair by a specialist will cost more.

Stages of self-parsing:

1. It is necessary to unscrew the screws on the outer part of the case. As a rule, they are located on the back of the device and can be removed with a screwdriver;

2. There are screws that have no edges and look like bumps. They are unscrewed using pliers (you can turn back the usual screws for a cross-head screwdriver);

3. If there are latches in the case, they must be opened. This is done with a long screwdriver. Typically, these latches are located on the underside of the coffee maker;

4. When the case is open, you can begin to determine the malfunction. It is quite easy to find spare parts for imported devices on free sale. Most likely, you will still need to contact a service center for them;

Sometimes ground coffee gets into the gears of the electric motor and triggers the protection. To clean the coffee maker, turn it over, unscrew the screws and remove the bottom cover. Then clean everything with a vacuum cleaner, grease with grease.

When there are doubts that self-repair will lead to a positive result, it is better not to risk it. Many service centers refuse to repair a device that was previously disassembled at home.

Any electrical device can fail over time. Repairing coffee makers from Delonghi, Saeco or Krups is quite easy to do with your own hands. These kitchen appliances are considered one of the easiest to repair and operate.

Before you start repairing the device, you need to determine what exactly broke in it. This will greatly speed up and simplify the repair process. There are two types of coffee machines:

Their main difference is the working pressure. In drip coffee makers (Bosch - Bosch, Zelmer - Zelmer, Vitek - Vitek) hot water drips through the coffee filter, through which it passes into the cup, already being a fragrant drink. In an espresso, a stream of boiling water is poured into the cup, passing through a coffee tablet (compressed ground natural coffee). The advantage of using espresso machines - Electrolux, Binatone, Braun, Philips (Philips) and many others - is that they can work without a filter.

Photo - espresso

Capsule coffee machines for brewing coffee have a special container into which ground natural powder is poured. This allows brewing a drink with or without pressure. The key difference between these functions is that with professional espresso machines, you can make a frothy coffee.

Photo - kapelnaya

Main problems coffee machines and coffee makers of domestic and professional type:

1. The water stopped flowing. Most likely, one of the pipes supplying water was simply clogged;
2. The coffee began to give off a strange smell or taste. In this case, it is not always necessary to repair the coffee makers yourself, perhaps you just changed the coffee tablets (they are Dolce Gusto - Dolce Gusto, Nestlé, Jacobs, etc.). Another reason can be a clogged filter or cheap material for the device. If the optimum water temperature for brewing coffee is 95 degrees, then the internal parts are heated to 125 and above. As a result, the cheap plastic can start to melt, imparting its taste to the drink;
3. Cold coffee. The heating element stopped working;
4. Incorrect dosage of water (found in capsule coffee makers). A breakdown can occur both in the engine and in the timer circuit;
5. The espresso machine does not turn on. There may be several reasons: breakdown of the engine, pump, problems with the power cord;
6. You cannot set the brewing or filling time of the cup.Depending on the type of coffee maker, this may be a breakdown of the time relay, control circuit, engine (or one of its compartments).

It is worth noting that after the intervention, warranty repairs will no longer be provided, so if you are not confident in your abilities, it is better to contact the branded service center.

Photo - schematic diagram

In order to repair any coffee makers (Nespresso - Nespresso, Delongy), you will need to disassemble them first. Step-by-step instructions on how to do this:

1. There are set screws on the back of the coffee machine. They need to be untwisted and put aside. They can be of several types: hidden, cruciform and cone-shaped (often found in Indesite). They are removed with a screwdriver, pliers or other suitable tools;
2. If, after removing the screws, the case is not retracted, then it is secured with hidden locks. The latches are located at the bottom of the rear panel. They cannot be opened from the outside, so you have to pry them with a knife or screwdriver;
3. After removing the case, you can start repair work.

If the pipe is clogged at Delongey, Bork - Bork, Ariete - Ariete or other coffee makers, then you need to use a long thin rubber hose for repairs. It starts up along the duct and breaks through the blockage. Sometimes for such purposes, special brushes with a flexible leg are used, they allow you to clean the pipe and remove not only coffee, but also mineral deposits.

Photo - construction

Cleaning the filter is a little more difficult. With frequent use, various debris accumulates on it: salt plugs, coffee dust, scale. It should be cleaned only according to the instructions, since otherwise, the integrity of the spare part may be damaged. In most cases, it is allowed to wipe it with a swab dipped in alcohol or other degreaser. Rinse the part thoroughly after rinsing.

Photo - filter

Also, problems can be associated with the filter if water leaks from the coffee maker. This is often found in machines manufactured by Moulinex, Krups, Rowenta, Saego. A special valve is installed near the filter, which, after turning off the timer, turns off the water supply. If after a certain time the drink has not stopped flowing, then the cause is a malfunction of this element. The valve may wear out after frequent use, or it may simply not be able to handle the accumulated amount of coffee. To check and fix the breakdown, you need to disassemble the coffee machine, pour the coffee out of it and inspect the valve. Please note that it cannot be repaired, so the part changes immediately.

Photo - disassembly

If the coffee maker Redmond, Spidem, Tefal, Siemens and others does not turn on, then urgent repair is required:

1. The first step is to check the power wire. It needs to be examined for an open circuit, and also to additionally check the grounding. It connects to the terminal block, so be careful when diagnosing;
2. Sometimes, household coffee machines made in China simply lose contacts. It also occurs in professional models (zauber, melitta, trevi). In this case, you need to check all the places where the wires are connected to the control circuit;
3. Many modern cars (Senseo¸Siemens, Ufesa) sin with a low-quality thermostat. To diagnose it, you need to remove one wire from its end and check the contacts with a tester. With a serviceable element, the circuit must be closed;
4. Also, the coffee maker may not turn on if the heating element needs repair. It is called in the same way as a thermostat. For many models (Jura Impressa, Miele, Gaggia, Butler) it is made in the form of a disk, so it will be rather difficult to change it, it is easier to try to repair a part or buy a new car;
5. There are also certain secrets to cleaning the engine. In the departments of caring products, special brushes are sold that will help clean different parts of the motor without damaging the fragile material.It should be noted that in AEG, Solis or Unit coffee makers, the motor has several compartments, each of which is cleaned separately.

Video: Delonghi Coffee Maker Repair