Hotpoint – H/A - Ariston automatic, built-in coffee machine MCX 103 X - MCK 103 X/HA Automatic, built-in coffee machine Contents 1) 2) 3) 4) 5) 6) 7) Technical Specifications Accessibility Wiring diagram Water circuit diagram Test procedures Troubleshooting Technical info Technical Specifications Accessibility Unscrew the first Unscrew the first six screws vi six screws securing the securing the right surround on the of side the rightside hand surround...... … and the other six screws securing the surround on the left. continued Removing the surround Accessibility Unscrew the three screws securing the surround at the top, near the brew group.. … and the two screws at the bottom. continued Removing the surround Accessibility Unscrew the two screws securing the cover on the right ,... ... and the 1 screw on the left (be careful when putting back together). continued Removing the surround Accessibility On taking off the cover, remove the faston and other connectors, as shown in the photo. Removing the surround Accessibility Unscrew the screw on the left and The cappuccino foamer pipe can then be pulled out. remove the switch and .. .. on the right. If this is too awkward to do, we recommend … … unscrewing the 3 screws. Removing the surround Accessibility To remove the outer casing, unscrew the 3 screws in the rear panel. continued Removing the rear panel. Accessibility … and unscrew the screws shown in the photo on both the right and left. Caution: there is also a screw at the bottom of the trays. Remove the casing. Removing the casing Accessibility To remove the cover, unscrew the 4 screws as shown in the photos. Removing cover Accessibility Unscrew the 2 screws securing the finger guard and pull it upwards to remove. Dismantling the coffee grinder Unscrew the plastic cap Accessibility Unscrew the 3 screws securing the coffee bean hopper. Dismantling the coffee grinder Accessibility Unscrew the screws securing the knob. Dismantling the coffee grinder Accessibility Lift off the bean hopper. Dismantling the coffee grinder Accessibility Disconnect the two faston connectors from the motor and pull the grinder up and out. Dismantling the coffee grinder Accessibility Unscrew the rubber cap Flow meter Detach connector Detach connector Dismantling the flow meter Using a screwdriver as a wedge, unhook the flowmeter Accessibility Pull out the small spring Ulka pump Pull out the tube; be careful with the o-ring Remove the wire spring Pull out the tube continued… Dismantling the pump Accessibility Pull out the tube feeding into the pump Holding the pump lug with a 12mm spanner, unscrew the valve + damper assembly Pull the pump out from its rubber support, first from the bottom then from the top. Dismantling the pump Accessibility Unscrew the 5 screws securing the circuit board to the casing; be careful with the cable glands! 2 at the top 1 in the middle Power board Removing the circuit board 2 at the bottom Accessibility Unscrew the 2 screws indicated Pull out the tubes from the damper and valve Steam unit Remove the steam vent Unscrew the earth screw continued… Dismantling the steam unit Accessibility Take out the earth faston connector from the solenoid valve. Now you can extract the steam unit to replace the full sub-assembly, solenoid valve and TCO’s (TCO’s are secured with a nut on the inside). Dismantling the steam unit Accessibility To remove the generator, disconnect tubes from couplers, there are 4 screws to unscrew. Caution: hold the nuts in place on the inside. continued… Dismantling generatore + meccano valve Accessibility Near the slide Near the solenoid valve Inside the door Inside the tank compartment Dismantling generatore + meccano valve Accessibility Caution: When assembling, align the meccano valve with the brew group. Position the 4 screws + 4 bolts, then give them a few turns; then, with the machine in test mode, allow the carriage to rise to the top dead center, pull out the plug then tighten the four screws to a torque value of 2/3Nm. 4 1 Final torque for front and back screws of 2/3Nm Screw tightening sequence 2 3 1. Back left 2. Front right 3. Back right 4. Front left Dismantling generatore + meccano valve Accessibility Remove the 2 faston connectors from the motor board... After removing the steam unit, you can also remove the positioning assembly. … and the faston connector from the earth. Dismantling positioning assembly Accessibility Remove the brew group. Unscrew the 2 screws. (When reassembling, add LOCTITE Type 243 to the thread and tighten to a torque of 2–2.5 Nm) Dismantling positioning assembly Remove the carriage. Accessibility Unscrew the self-tightening screw. You can now pull out the positioning unit. Dismantling positioning assembly Wiring diagram THEORETICAL DIAGRAM Wiring diagram MICRO KEY M1 TOP UNIT M2 BOTTOM UNIT M3 COFFEE GROUNDS DRAWER M4 ACCESS DOOR M5 IFD PRESENCE M6 PIPETTE PRESENCE MICRO KEY PRACTICAL DIAGRAM water circuit diagram test procedure Touch Super Vapour MODEL TEST LOAD TEST MODE PROCEDURE With the machine on stand-by (off but with the main on/off switch set to I), open the service door and press and hold the 1 CUP, STRENGTH and MENU keys at the same time for at least 6 seconds, or until the message “SELECT TEST” appears on the display. After this, shut the service door and press the STEAM icon: LOAD TEST MODE will appear on the display. To exit test mode, unplug from the power supply. ICON AND ASSOCIATED LOAD ACTIVATION ICON LOAD Long/short PUMP Key Lock MOTOR UP + LIGHT Menu HEATER Strength STEAM UNIT 2 cups Solenoid valve 2 (brew head) + FAN 1 cup Solenoid valve 1 (drain) Steam Solenoid 1 + Solenoid 2 UP menu GRINDER Hot water MOTOR DOWN test procedure Touch Super Vapour MODEL TEST DISPLAY TEST MODE PROCEDURE With the machine on standby (off but with the main on/off switch set to I), open the service door and press and hold the 1 CUP, STRENGTH and MENU keys at the same time for at least 6 seconds, or until the message “SELECT TEST” appears on the display. After this, shut the service door and press the 1 CUP icon: all digits will light up on the display followed by the words “DISPLAY TEST MODE”. ICON AND ASSOCIATED DISPLAY Icon Display Unit 1 cup BUTTON 1 2 cups BUTTON 2 Steam BUTTON 4 Long/short BUTTON 9 STRENGTH BUTTON 10 Down Menu BUTTON 8 Key Lock BUTTON 12 MENU BUTTON 11 UP menu BUTTON 6 OK BUTTON 7 Hot water BUTTON 5 On/Stand by BUTTON 0 NOTES When not used for 10 seconds, the machine exits test mode. The original language is reset and the first priming enabled. Troubleshooting Before doing anything or replacing any components, make sure you have all service documentation for the model to be repaired (specifications, test procedures, technical reports and information). Possible complaints you may receive from customers are listed below. The first thing to do is check if there are reasonable grounds to the complaint. It is important to determine if the problem was caused by: 1) Incorrect use of appliance by the customer. 2) Technical fault. Troubleshooting 1) Complaints may be caused by incorrect use of the appliance, and generally refer to: - The coffee is not hot. - The coffee is not very creamy, and doesn’t taste nice (see table on next page) Troubleshooting Problems complaints The coffee is not hot. Caution: check the temperature after the third coffee has been made; the temperature should be 78 C+- 3 C What to ask the customer When did the problem occur? Right from the beginning or after a period of time? Possible causes Remedies - The cups haven’t been warmed. - The brew group is cold. - Heat the cups with hot water. (Especially on cold days) - Heat the brew group by selecting “RINSE” The coffee temperature set is too low. From the menu, set a higher coffee temperature. (There are three options) Hot water tank is crusted with limescale. Check how many coffees have been made and how often it has been descaled. Check the temperature of the coffee leaving the brew head; check after the third coffee. The temperature should be 78 C+- 3 C It it is below this, descale and try again. continued Troubleshooting Problems complaints The coffee tastes bad, is watery and not very creamy. What to ask the customer When did the problem occur? Right from the beginning or after a period of time? Possible causes The coffee grind is too coarse. The grinders are worn out. Remedies Check grinder settings. Turn the grinder setting knob to position 4/5 (factory setting) with the grinder running; brew 2/3 coffees and check how they are delivered. If nothing has changed, turn the knob to position 1 (with the grinder running) and try again, brewing 2/3 coffees. If it is still being ground too coarsely, take the machine away. (See specifications on next page) Replace the grinder. continued Troubleshooting Problems complaints The coffee tastes bad, is watery and not very creamy. What to ask the customer When did the problem occur? Right from the beginning or after a period of time? Have you changed type of coffee? Possible causes The coffee is too finely ground. Remedies Check grinder settings. Turn the grinder setting knob to position 7 with the grinder running; brew 2/3 coffees and check how they are delivered. If it is still too finely ground, take the grinding unit away. (See specifications on next page) A different type of coffee has been used. Readjust the grinder settings to suit personal taste. Not a good quality coffee or not suitable for use with espresso machines. Use a better quality coffee / use a blend that is recommended for espresso machines. Troubleshooting 2) When a fault is encountered, the machine may generate the following messages: - General alarm - Coffee too finely ground, adjust grinder. - Fill the coffee bean hopper. - Fill the tank. - Descale (see table on next page) Troubleshooting Error message When? The message appeared as soon as the machine was switched on. General alarm The message appeared when the motor was briefly actioned. Six minutes after it was switched on, the machine still showing that it is heating up. Possible causes Remedies NTC, temperature sensor. Check the sensor connection on the PCB; check the resistance in ohms: if it is 0 (short circuit) or infinite (open circuit) replace the component. Upper or lower micro limit switch. Check microswitches are working properlty, and replace as applicable. Hall cell sensor board Check the connection between the Hall cell sensor and circuit board. Replace if necessary. Main PCB Replace. Safety TCO activated. Replace. Heating element not heating. Replace. Main PCB Check the connection and replace as necessary. continued Troubleshooting Error message General alarm Coffee too finely ground, adjust grinder. When? Possible causes Remedies After switching on, there was a funny noise when the brew group moved. The upper and lower microswitches are not closed. Check if the two micro-switches are working properly, and if necessary replace them. While operating Air in water circuit Reset the coffee grinder settings by moving the knob to a higher number. (Always do this with the grinder running). Push the tank to make sure it is securely engaged, bleed any remaining air from the circuit (press “hot water”). Check the connection and replace the flow meter if necessary. Check the permanent filter below the water tank to make sure there is nothing obstructing the flow of water; clean and replace as necessary. Check the generator by disconnecting the inlet water pipe and starting the pump (in test procedure) to remove the air pocket. continued Troubleshooting Error message Fill coffee bean hopper (make sure it is full) Fill the water tank (make sure it is full) When? Possible causes Remedies The message persists even when there are beans in the hopper. There was a funny noise when coffee was grinding. Friction noise due to stones or other objects in the grinding wheels. Dismantle the top part of the grinder unit and take out the stone or excess coffee grains inside. Check the grinder motor is working using the test procedure; if the motor is idling the transmission belt is broken. The entire grinder needs to be replaced in this case. The message persists even when there are beans in the hopper. The motor is not rotating. The motor is faulty. Replace the entire grinder unit. The message appears even when there is water in the tank. Float Check the float in the tank and that it is free to move in its assigned position. Reed switch sensor. Check the reed switch, making sure it is connected properly. Replace if necessary. continued Troubleshooting Error message Descale When the machine indicates that descaling is required, is is not a sign of a fault, but notification that the machine, the generator and relevant pipes need to be thoroughly cleaned to get rid of lime scale. When? Remedies The flow meter measures the amount of water used and when a preset limit is exceeded the machine generates an alert. Four different water hardness levels can be set. The reactive strip supplied with the machine is a quick way of testing water hardness so you can set it to the correct level. (1 soft water ...... 4 very hard water) Descale. The 4 water water water water settings are: hardness 1 = 250 litres hardness 2 = 130 litres hardness 3 = 80 litres hardness 4 = 40 litres Problems occur when the descaling message appears right after the appliance has been descaled. In this case, it means that it was not done properly and has to be repeated. Technical Information Setting the grinder Unscrew the screw on the knob and pull it out. Unscrew the two screws and remove the safety guard. Turn the ring shaft clockwise until the end of stroke position. Take out the moving grinder. continued on following page... Technical Information Setting the grinder Check that the elastic ring is in the right position. Remove the retaining ring. continued on following page... Technical Information Setting the grinder Turn the ring shaft anticlockwise until the end of stroke position then pull it out. Turn the ring nut CLOCKWISE for finer grinding. Turn the ring nut ANTICLOCKWISE for coarser grinding. Turn in 1 or 2 clicks at a time. continued on following page... Technical Information Setting the grinder Insert the shaft, aligning the scale on the ring nut with the rib indicated. Insert the retaining ring. (Make sure you insert it correctly.) continued on following page... Technical Information Setting the grinder Turn the ring shaft CLOCKWISE until the end of stroke position then insert the grinder. Then turn it ANTICLOCKWISE until the end of stroke position.