Coffee machines DeLonghi are deservedly popular due to the reliability and quality of the resulting drink, however, even the most advanced equipment requires regular maintenance. The heart of any espresso machine is brewing unit, the mechanism that is directly responsible for making coffee. Understanding how this unit works and why it is needed will help the owner extend the life of the device and avoid expensive repairs at a service center.
Many users are faced with a situation where the machine begins to make noise, produces weak pressure, or simply stops turning on, and often the reason lies precisely in contamination or wear of the internal components of the brewing module. Regular cleaning the infuser - this is not just a recommendation, but a necessity dictated by the physics of the process: coffee oils oxidize, and fine dust forms a dense coating that interferes with the movement of mechanisms.
In this article, we will look in detail at what exactly an infuser is, how to properly remove and maintain it, and also look at typical malfunctions that you can deal with yourself. You'll find out why DeLonghi makes this element removable and how to properly care for the moving parts to enjoy the perfect espresso every morning.
Design features of the brewing unit
Infuser, or brewing unit, in coffee machines DeLonghi is a complex mechanical module consisting of several moving and fixed parts. This is where the ground coffee is mixed with hot water under high pressure. The design is designed to ensure optimal extraction time and the formation of the correct crema foam on the surface of the drink.
The mechanism is based on two side walls, between which the pistons move. When a command is given to prepare coffee, the motor drives gears that compress the pistons, forming a “tablet” of ground beans. Tightness This process is critical: if the seals are worn out, water will flow through the coffee too quickly or leak by.
⚠️ Attention: Never try to disassemble the brewing unit itself into small components (screws, gears) without special lubricant and skills. This will lead to disruption of the geometry of the pistons and will require complex calibration.
The most important element is the system of seals and seals that ensure the tightness of the chambers. Over time, rubber parts lose elasticity, which can lead to leaks or loss of pressure. Understanding the Device brewing module allows you to notice wear and tear in time and replace consumables.
What is the block made of?
The main body of the DeLonghi infuser is made of high-strength food-grade plastic that is resistant to temperature changes. Metal elements (pistons, shafts) are coated with a special lubricant that is safe for contact with food.
Why do you need to remove and clean the unit?
Regular maintenance is necessary to remove residual coffee oils and fine dust that inevitably accumulate during use. If you ignore this procedure, old coffee begins to taste bitter and transfers an unpleasant taste to fresh portions, spoiling the taste of the drink. Moreover, hardened plaque can cause moving parts to jam.
The second reason is hygiene. The humid and warm environment inside the coffee machine is ideal for the growth of bacteria and mold. Cleaning the brewing unit under running water allows you to remove biological contaminants that do not dissolve during automatic washing of the machine. This is especially important if you use the machine daily.
Rinse the brewing unit with warm water without using detergents each time you remove it to discard the pulp. This will take 15 seconds, but will significantly improve the hygiene of the device.
The accumulation of coffee dust also affects the operation of the mechanics. Small particles enter the lubricant, turning it into an abrasive paste, which accelerates wear of rubbing parts. Timely decontamination keeps factory lubrication effective longer, preventing creaking and stiff movement of mechanisms.
Step-by-step instructions: how to remove and rinse
Procedure for removing the brewing unit in machines DeLonghi standardized, but requires compliance with a certain sequence of actions so as not to damage the plastic fasteners. Before starting any manipulations, make sure that the coffee machine is turned off with the power button and, preferably, unplugged.
Open the service door located on the side of the chassis. Inside you will see a handle or lever marked with a lock symbol or an arrow. Gently press the latches and pull the module towards you. It should come out freely, without excessive effort.
☑️ Procedure for removing the block
After removing, rinse the unit under running warm water. Use a soft brush or sponge to remove visible dirt from the surface of the pistons and screens. Do not use abrasives or metal pads as they may damage O-rings and plastic surfaces.
⚠️ Attention: It is strictly forbidden to wash the brewing unit in the dishwasher. High temperatures and aggressive detergents will deform the plastic and destroy the special lubricant.
Lubrication and maintenance of moving mechanisms
Although the manufacturer claims that the unit does not require lubrication during its entire service life, in practice, intensive operation and the use of hard water may require updating the lubricating layer. For these purposes, only special food grade lubricant, safe in contact with hot foods and water.
The side guides of the pistons and the friction points of the plastic parts are subject to lubrication. The composition should be applied in a thin layer, carefully distributing it over the surface. Too much lube can cause it to wash away in your first cup of coffee, so it's important not to overdo it.
Pay special attention to the condition of the rubber seals. If they look dry or cracked, they can be lightly treated with silicone lubricant to restore elasticity, but in case of deep cracks it will be necessary to replacing seals. This will prevent water from leaking into the machine body.
Use only specialized food grade lubricant for coffee machines. Conventional technical lubricants are toxic and unsuitable for contact with food.
Typical faults and methods for their elimination
Coffee machine owners DeLonghi often encounter a number of characteristic problems associated with the brewing unit. Knowing the symptoms allows you to quickly diagnose a problem and take measures to eliminate it, often without calling a technician.
Below is a table of common problems, their possible causes and solutions:
| Problem | Probable Cause | Solution method |
|---|---|---|
| The machine hums, but the coffee doesn't come out | Screen clogged or piston jammed | Thorough flushing and checking the stroke of the pistons |
| Water flows into the drip tray | Wear of seals or block displacement | Replacement of seals or correct installation of the unit |
| The coffee is weak and without foam | Insufficient pressure, mechanism wear | Checking grinding adjustment and piston condition |
| Creak when working | Lubricant drying out, dust entering | Cleaning and lubrication of moving parts |
If the problem persists after cleaning and lubrication, there may be mechanical wear on the gears or a breakdown of the drive motor. In such cases it may be necessary brewing unit repair with replacement of damaged parts with new original components.
How to properly install the block back
Once all cleaning and drying procedures have been completed, the module must be properly reinstalled. Installation errors may result in the machine not turning on or operating incorrectly and displaying errors on the display.
Insert the block smoothly, without jerking. It should fit on the guides until it clicks. If you feel resistance, do not press with force - most likely the insertion angle is broken. Remove the block, check the orientation and try again.
After installation, close the service door all the way. Turn on the coffee machine. Typically, the device will automatically perform a rinse cycle. If the machine makes strange noises or does not go into ready mode, turn it off, open the door and check the seal. brewing unit.
⚠️ Attention: Make sure the block is inserted all the way and secured. Incomplete installation may result in high pressure water leaking into the electronics housing.
Frequently asked questions (FAQ)
How often should I remove and wash the brewing unit?
It is recommended to remove and wash the unit with warm water weekly when the machine is actively used. If you make a lot of coffee daily, the frequency can be increased to 2-3 times a week. General cleaning with removal of seals is carried out every 3-6 months.
Can the brewing unit be washed with soap?
It is not recommended to use regular laundry soap or dishwashing detergent as they may leave a film or odor that will affect the taste of the coffee. It is best to use only warm water. To remove fat deposits, there are special tablets for cleaning coffee machines.
What should I do if the brewing unit does not fit back in?
Most often the problem is the incorrect position of the pistons. Make sure they are in the down position (as when removed). If they are extended, gently push them down with your fingers until they stop, being careful not to damage the mechanism.
Where can I buy new lubricant for the brewing unit?
Specialized food grade lubricant (often silicone or Teflon based) can be purchased at hardware stores, coffee shops, or on the official websites of coffee machine manufacturers. Look for the "Food Grade" or "for coffee machine" labeling.