1. Instruccions de seguretat
Please read all instructions carefully before using the KOIOS EM621 Espresso Machine. Retain this manual for future reference.
1.1 Seguretat general
- No submergiu l'aparell, el cable d'alimentació ni l'endoll en aigua ni en altres líquids.
- Aquest aparell només és per a ús domèstic. No utilitzar a l'aire lliure.
- Mantenir l'aparell fora de l'abast dels nens.
- Always ensure the water tank is filled before operation to prevent damage to the pump.
- Feu servir només aigua freda i fresca al dipòsit d'aigua.
- Exercise caution when handling hot surfaces and steam. The steam wand can become very hot.
- No feu servir l'aparell si el cable d'alimentació o l'endoll està danyat.
- Assegureu-vos que l'aparell estigui col·locat sobre una superfície estable, plana i resistent a la calor.
1.2 Seguretat elèctrica
- Connect the appliance to a grounded electrical outlet with the correct voltage (120 V).
- Desendolleu l'aparell de la presa de corrent quan no l'utilitzeu i abans de netejar-lo.
- No deixeu que el cable d'alimentació pengi de la vora d'una taula o taulell, ni toqui superfícies calentes.
- If overheating occurs, unplug the power cord immediately and allow the machine to cool.
2. Producte acabatview
The KOIOS EM621 is a semi-automatic espresso machine designed for home use, featuring a 20-bar pump, PID control, and a steam wand for milk frothing.

Imatge 1: Frontal view of the KOIOS EM621 Espresso Machine, showing the control panel, portafilter, and drip tray.
2.1 Components
- Dipòsit d'aigua: 58oz (1700ml) removable tank with a transparent design and carrying handle.
- Tauler de control: Features power button, 1-cup, 2-cup, and Americano buttons, and a pressure gauge.
- Portafiltre: Holds ground coffee, includes 2 stainless steel filters for different serving sizes.
- Vareta de vapor: 360° rotatable stainless steel wand with anti-scald silicone handle for frothing milk.
- Safata de degoteig: Removable for easy cleaning, with a red indicator knob for excess water.
- Cullera de mesurament: Included for accurate coffee dosing.
2.2 Controls
- Botó d'encesa: Encén/apaga la màquina.
- 1-Cup Button: Dispenses a single shot of espresso.
- 2-Cup Button: Dispenses a double shot of espresso.
- Americano Button: Dispenses an Americano.
- Botó de funció: Selects between Coffee, Hot Water, and Steam modes.
- Manòmetre: Mostra la pressió de preparació del cafè.
3. Configuració
3.1 Neteja inicial
- Traieu tots els materials d'embalatge.
- Wash the water tank, portafilter, filters, measuring spoon, and drip tray with warm soapy water. Rinse thoroughly and dry.
- Netegeu l'exterior de la màquina amb anunciamp tela.
3.2 Omplir el dipòsit d'aigua
- Remove the water tank from the back of the machine using its handle.
- Ompliu el dipòsit amb aigua fresca i freda fins a la línia MAX.
- Torneu a col·locar el dipòsit d'aigua a la màquina, assegurant-vos que estigui ben col·locat.
3.3 Preparació de la màquina
Before first use, or if the machine has not been used for a long time, prime the system:
- Assegureu-vos que el dipòsit d'aigua estigui ple.
- Col·loqueu una tassa sota el broc del portafiltre (sense cafè).
- Turn the function knob to the "Coffee" mode limit.
- Press the 1-cup button. Water will flow through the portafilter. Let it run for about 30 seconds.
- Turn the function knob to the "Hot Water" mode. Let water flow from the steam wand for about 30 seconds.
- Turn the function knob back to the neutral position. The machine is now primed.
4. Instruccions de funcionament
4.1 Elaboració d'espresso
- Preescalfament: Turn on the machine. Ensure the function knob is set to "Coffee". Wait for the indicator light to turn solid, indicating the machine is preheated.
- Preparar el cafè: Grind fresh coffee beans to a fine espresso grind. Fill the appropriate filter basket (1-cup or 2-cup) with ground coffee.
- Tamp: Utilitzeu la tamper to press the coffee grounds firmly and evenly into the filter basket. Ensure the surface is level.
- Connecteu el portafiltre: Insert the portafilter into the group head and twist it firmly to the right until it is securely locked.
- Col·loca la copa: Position your espresso cup(s) on the drip tray directly under the portafilter spouts.
- Cervesa: Press the 1-cup or 2-cup button. The machine will begin brewing. The PID control system ensures optimal water temperature for extraction, and the pre-soak system moistens the grounds for uniform extraction.
- Atura: The machine will automatically stop brewing when the programmed volume is reached. You can manually stop brewing at any time by pressing the button again.
- Treure el portafiltre: Traieu amb cura el portafiltre girant-lo cap a l'esquerra. Desfeu-vos dels mòlts de cafè usats.
4.2 Escuma de llet
- Preparar la llet: Fill a stainless steel frothing pitcher with cold milk (whole milk is recommended for best results).
- Activa Steam: Turn the function knob to the "Steam" mode. Wait for the steam indicator light to illuminate, indicating the machine is ready to produce steam.
- Vareta de purga: Briefly open the steam valve to release any condensed water from the wand. Close the valve.
- Escuma de llet: Immerse the tip of the steam wand just below the surface of the milk. Open the steam valve slowly. Move the pitcher up and down to create foam.
- Atura el vapor: Once the desired texture and temperature are achieved, close the steam valve and remove the pitcher.
- Vareta neta: Netegeu immediatament la vareta de vapor amb aiguaamp drap per evitar que s'assequin els residus de llet. Obriu breument la vàlvula de vapor de nou per buidar la llet de l'interior de la vareta.
4.3 Funció d'aigua calenta
To dispense hot water for warming cups or other uses:
- Assegureu-vos que la màquina estigui engegada i preescalfada.
- Col·loqueu una tassa sota la vareta de vapor.
- Turn the function knob to the "Hot Water" mode. Hot water will dispense from the steam wand.
- Turn the knob back to the neutral position to stop the flow.
5. Manteniment
5.1 Neteja diària
- Portafiltres i filtres: After each use, remove the portafilter, discard grounds, and rinse the portafilter and filter basket under running water.
- Safata de degoteig: Empty and clean the removable drip tray daily or when the red indicator knob appears.
- Vareta de vapor: Always wipe the steam wand immediately after frothing milk. Purge the wand to clear any internal residue.
- Exterior: Netegeu l'exterior de la màquina amb un damp tela. No utilitzeu netejadors abrasius.
5.2 Neteja del dipòsit d'aigua
Netegeu el dipòsit d'aigua setmanalment amb aigua tèbia i sabó. Esbandiu-lo bé per eliminar qualsevol residu de sabó.
5.3 Descalcificació
Regular descaling is essential to maintain machine performance and extend its lifespan. The frequency depends on water hardness and usage.
- Prepareu una solució descalcificadora segons les instruccions del fabricant del descalcificador.
- Ompliu el dipòsit d'aigua amb la solució descalcificant.
- Remove the portafilter handle. Place a large water bowl under the coffee spout and another under the steam wand.
- Press the 1-cup and 2-cup buttons simultaneously. The machine will begin the descaling cycle.
- Allow the machine to complete the cycle, or continue cleaning until the water tank is empty.
- Després de la descalcificació, esbandiu bé el dipòsit d'aigua i ompliu-lo amb aigua fresca.
- Run several cycles of fresh water through the coffee spout and steam wand to rinse out any remaining descaling solution.
6. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Power button red light flashing, machine not heating. | Function knob not in "Coffee" mode limit or empty water tank. | Ensure the function knob is turned fully to the "Coffee" mode limit. Check and refill the water tank. |
| Machine malfunctions during operation. | Temporary system error. | Long press the power button for 5 seconds to clear the machine's memory and reset. |
| Overheating occurs. | Extended use or internal issue. | Unplug the power cord and allow the machine to cool down completely before resuming use. |
| Coffee puck is watery sludge, not solid. | Insufficient coffee grounds, incorrect grind size, or improper tamping. | Ensure enough coffee grounds are used. Adjust grind size to be finer. Tamp fermament i uniformement. |
| Milk frothing wand not producing steam or poor foam. | Clogged wand, insufficient heat, or improper technique. | Clean the steam wand thoroughly. Ensure the machine is fully heated in "Steam" mode. Review frothing technique. |
7. Especificacions
- Marca: KOIOS
- Model: EM621
- Tipus de cafetera: Màquina de cafè exprés semiautomàtica
- Pressió de la bomba: 20 Bar
- Potència: 1200W
- Capacitat del dipòsit d'aigua: 58 oz (1700 ml)
- Material: Stainless Steel exterior
- Dimensions del producte: 11.61 "P x 11.61" W x 6.3" H
- Pes de l'article: 8.71 lliures
- Característiques especials: PID Control System, Smart Pre-soak System, 360° Steam Wand, 3 Extraction Choices (1 cup, 2 cups, Americano), Hot Water Function, Descaling Function.
- Components inclosos: Espresso Machine, 2 Stainless Steel Filters, Measuring Spoon, Removable Drip Tray, Steam Wand, Water Tank.
8. Garantia i assistència
The KOIOS EM621 Espresso Machine comes with a 1 any de garantia.
If you have any questions, encounter issues, or require assistance with your product, please contact the KOIOS after-sales support team. Refer to the contact information provided in your product packaging or on the official KOIOS weblloc web per obtenir els detalls d'assistència més actualitzats.