Unic Mira Technical Note Download Page 29

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

An insufficient infusion pressure

The infusion pressure is lower than 10 bar



Set the pump as indicated on ( § 5.3 )

Setting operations are unsuccessful





The pump is faulty

The motor-pump is

The motor-pump is no

- dirty filter

mechanically blocked

longer power-supplied

- coil condenser

- damaged pallets

(the thermal safety sys-

- broken coupling

tem and the circuit-

- faulty by-pass

breaker protecting the

motor

coil)

Check the cable







- Disassemble and restore the pump to its initial condition
- Reset pressure



A wrong decompression process

When the infusion process is over, you remove the filter-holder and you notice the

grounds pancake is wet.



Check:

- The temperature is too low



- Steam pressure

- The infusion time is too short



Grind

(A too coarse grind - a too

- Ground coffee dose

light dose - a too low pressure)

- Pump pressure

- The decompression circuit is blocked



Spray

- Filter

- Solenoid valve

Summary of Contents for Mira

Page 1: ...1 RB9002 MARCH 2014 EDITION ...

Page 2: ...sure controller 8 Pressure release valve adjustment 8 Pump pressure adjustment 9 Coffee grinding adjustment 9 8 PROGRAMING OF THE DIFFERENT COFFEE QUANTITIES IN THE CUP 9 2 Cups electronic box d2 type 11 Use of the doses to be programmed 11 Configuration parameters 11 Modification of the configuration parameters 11 3 Cups electronic box d3 type 12 Use of the doses to be programmed 12 Configuration...

Page 3: ...AYED FAILURES 23 Problems in connection with the electronic boxes control button 24 Fuse problems 24 Dosage problems 25 105 second safety system of the coffee unit 25 Metering safety system 26 Dosing device safety system 27 13 OTHER FAILURES 28 Hydraulic problems of the coffee unit 28 Doses lighter than initially set 28 Dripping outside infusion periods 28 An insufficient infusion pressure 29 A wr...

Page 4: ...tly earthed The manufacturer shall not accept any liability for damage due to faulty earth Only a qualified technician is allowed to access the internal parts of the appliance for maintenance and service operation Be careful of hot surfaces such as cup warmer group heads hot water and steam outlets Do not expose oneself to steam or hot water flow 2 IMORTANT NOTES This appliance is intended to be P...

Page 5: ...achine must be placed on a horizontal surface There must be a free space of 5 cm behind the machine and the ventilation holes on the top of the machine must not be obstructed A socket with a ground system and a water supply pipe corresponding to the characteristics of the machine are sufficient for connecting Set up cup racks after making adjustments The machine is not to be operated without its l...

Page 6: ... BOITIERS ELECTRONIQUES ET TRANSFORMATEUR NEON FEEDING ELECTRONIC BOXES AND NEON TRANSFORMER BORNIER TERMINAL PLUG PRESSOSTAT PRESSURESTAT THERMOSTAT SECURITE RESISTANCE HEATING ELEMENT SAFETY THERMOSTAT CABLE CORD MAIN COMMUTATOR BORNIER TERMINAL PLUG PRESSOSTAT PRESSURESTAT THERMOSTAT SECURITE RESISTANCE HEATING ELEMENT SAFETY THERMOSTAT CABLE CORD N Ph Ph1 Ph2 Ph3 N Ph1 Ph2 Ph3 380 400 415V TRI...

Page 7: ...ine Switch off and switch on the machine by setting the charge switch to Position 0 then to position 1 The filling starts again and lasts 3 minutes Internal boilers With the filter holder in place press the continuous stop key of each unit As soon as the water flows correctly from the spout with no air press the same key again to stop the water Heating When the boilers have been filled set the cha...

Page 8: ...Dismantle the cup rack remove the cover of the pressure controller to get to its adjustment screw TIGHTEN to LOWER the temperature LOOSEN to RAISE the temperature The pressure gauge red scale must indicate a pressure of between 0 9 and 1 bar which corresponds to a temperature of 120 C Pressure release valve adjustment MIRA Model The HP valve is located on the right side of the machine it is necess...

Page 9: ...OSEN to DECREASE the pressure TWIN TRI and QUATTRO MIRA Models The pump is located in the right side and the adjustment must be done from the same side of the machine TIGHTEN to INCREASE the pressure LOOSEN to DECREASE the pressure Coffee grinding adjustment Wait until the machine has reached the proper temperature 0 9 to 1 bar The fineness of the grinding determines the time it takes for hot wate...

Page 10: ... of the corresponding digital value from 00 to 99 Repeat operation at 3 for the other doses 2C for example 4 Pn DIGITAL PROGRAMMING Quick programming without coffee and or values carried forward on other units P5 Display Pn P1 à P4 Select the dose to be programed P5 Display of the digital value of the selected dose P1 Increase the value P4 Reduce the value P5 Memorize the new value Repeat operatio...

Page 11: ...l dosage dt dosage with Torino kit C0 C1 Chronometer for the infusion time C0 no chronometer C1 display of the infusion time A0 A1 Authorization to program A0 prohibited programing A1 authorized programing After switching on the display shows the following information in order The version number of the electronic memory ex r1 The type of box d2 The active functioning parameters ex dn CO A1 Modific...

Page 12: ...normal dosage dt dosage with Torino kit C0 C1 Chronometer for the infusion time C0 no chronometer C1 display of the infusion time A0 A1 Authorization to program A0 prohibited programing A1 authorized programing cc cC CC Start of infusion in small or large cup cc always starts in small cups CC always starts in large cups cC keep the last selection c or C After switching on the display shows the fol...

Page 13: ...e container is convenient press again on the same key Press on PRO 2 to confirm the new adjustment and come out of the programming mode Note the programming mode is automatically switched off after 20 seconds without any action SteamAir option The SteamAir option allows particularly when making cappuccino to foam the milk very easily and automatically the supply of air mixed with steam brings milk...

Page 14: ... reach the programmed T One impulse on the key makes the SteamAir flow until the liquid reaches the preset temperature see programming You can stop it manually by pushing again on the key Manual mode Over the programmed T If after the stop in automatic mode temperature reached you wish to continue the heating you have to press again the key Then you go into manual mode and the outlet is again acti...

Page 15: ...in the key pressed on until orange blink of the led which confirms that you have entered the programming mode Press the SteamAir key paying attention to the number of blinks and colour of the led which shows the temperature adjustment registered the led lights in orange it means that the adjustment is as in factory 62 C A blink corresponds to a difference of 2 C compared to the factory value with ...

Page 16: ...pense to the drain Through each coffee head and water nozzle 0 5 liter of water Through each steam nozzle some steam for 1 minute BEFORE PREPARING ANY BEVERAGE After service Take the 2 cup filter holder Place the rubber plug DO 197 inside the filter Decompression circuit Insert and tight the filter holder in the unit Press a coffee key to put the filter holder under pressure and then stop the unit...

Page 17: ...0 seconds At the stop of the automatic cycle put back the filter holder without the plug and without coffee then start a 2 large cups cycle to rinse it DHA Option Use 1 pair of cleaning rinsing capsules Inside each introduce 1 Detergent tablet Close the rotary cover Engage the 2 capsules inside the holder Close the DHA Keep pressed the key then press the 2 large cups display shows nP Press again t...

Page 18: ...removing the filter in soapy water Overflow tray Remove the overflow tray to empty it and rinse it under the tap Body Clean the body of the machine using a soft cloth and alcohol for the stainless steel parts and a non abrasive detergent for the painted parts ...

Page 19: ...gh Use 2 kg of salt when the softener is 600 mm high INSTRUCTIONS FOR USE Install an empty vessel with a 2 litre capacity under Pipe E Turn Handles C and D from the left to the right Unscrew G to remove the lid Insert salt Restore the lid to its initial position Turn Handle C from the right to the left Let the salted water run through Pipe F until it gets soft Turn Handle D from the right to the l...

Page 20: ...0 80 Daily consumption Softened water CN 97 Model 2500 2350 2100 1800 1600 1400 1000 Water in litres Coffee in kg 36 34 30 26 22 20 14 10 1 1 10 17 16 14 13 11 10 7 20 2 1 5 15 11 10 9 9 7 7 5 30 3 2 20 9 8 7 6 5 5 4 40 4 2 5 25 7 6 6 5 4 4 3 50 5 3 30 6 5 5 4 4 3 2 60 6 3 5 35 5 4 4 4 3 3 2 70 7 4 40 4 4 4 3 3 2 2 80 8 4 5 45 4 3 3 3 2 2 2 90 9 5 50 3 3 3 3 2 2 1 NUMBER OF 6 60 3 3 2 2 2 2 1 WEEK...

Page 21: ... drinks Machine preparation If the machine is not already equipped for connection to a computer system a coffee machine of the MIRA range must be modified as follows Electronic box ref 45124 and 45126 have to be replaced by electronic box ref 45128 and 45137 The following equipment is also supplied An interface box that records impulses coming from units and hot water outlets and transmit them to ...

Page 22: ...over 13 bar 188 PSI WATER SUPPLY PRESSURE 0 bar to 6 bar 0 PSI to 90 PSI If the machine sucks water directly from an external reservoir check the water level in the reservoir and the non return valve and filter fixed at the end of the inlet pipe PRECAUTIONS TO BE TAKEN A Switch off the machine before any action on the electric circuits B Cool the machine and make the pressures down before any acti...

Page 23: ...n with the electronic boxes control button page 24 Fuse See on Fuse problems page 24 Time See on Dosage problems page 25 105 sec Metering Time Dosage Metering See on Metering safety system page 26 105 sec See on Metering safety system page 26 Short circuit Metering Opened Metering See on Dosing device safety system page 27 ...

Page 24: ...rom the upper part of the machine after removing the cup warmer If the fuse is all right If the fuse is cut out Check the fuse holder Clean fuse fuse holder contact points Check the box connections Do not invert wires valve and motor pump wires The cause must be determined prior to fuse replacement Possible causes The valve coil of the unit is short circuited The motor pump coil or R C circuit is ...

Page 25: ...unit are better protected When the safety system is on t is displayed The flow of the water going through the coffee filter is insufficient The infusion time corresponding to the programed dose is more than 105 seconds The pump is faulty Check The pressure Power supply cables condenser The mechanical state of the motor pump filter coupling One of the water passage holes is clogged Check the hydrau...

Page 26: ...opped transmitting impulses to the unit electronic box for more than 5 seconds Start a coffee cycle Check the control LED located on the dosing device It does not flash It flashes The water does not run through the spout The water runs through the spout Either there is no more problem and it all nor mally works Or the outgoing signal wire of the device is dis connected terminal 32 out The hydrauli...

Page 27: ...osing device is short circuited Terminal 30 is earthed The 9V power supply circuit of the dosing device is opened Terminal 30 or earth are disconnected To use the unit press the Continu Stop key Check the cables and the connector of the dosing device Replace the dosing device as necessary ...

Page 28: ...of the connections located after the dosing device outlet leaks Check waterproofness Replace gaskets Repeat dose programing Dripping outside infusion periods Water goes through the unit or the decompression pipe outside infusion periods The 3 way valve is opened as a result of the too highly set expansion pressure 13 bar The valve flaps are faulty Set the high pressure valve opening at 13 bar The ...

Page 29: ...g tem and the circuit faulty by pass breaker protecting the motor coil Check the cable Disassemble and restore the pump to its initial condition Reset pressure A wrong decompression process When the infusion process is over you remove the filter holder and you notice the grounds pancake is wet Check The temperature is too low Steam pressure The infusion time is too short Grind A too coarse grind a...

Page 30: ...ith an insulating agent scale or the probe wire is cut out The filling valve relay got stuck Clean probes and check cables Replace gaskets and clean the filling valve surface Replace the electric valve or the leval box as necessary The boiler is empty RISK TO RUIN THE HEATING ELEMENT The probe is directly earthed The filling valve is not ON or its coil is burnt out Check the probe wire the valve c...

Page 31: ...cordingly Make sure that each pin of the heating element works Impossible programing IMPOSSIBLE PROGRAMING Check the configuration of the box A0 Prohibited programing A1 Authorized programing See on pages 28 and 29 Display of one safety signal P1 to P5 Safety key F Fuse t Time co cc Dosing device Refer to the corresponding paragraph to repair ...

Page 32: ...essure 9 bar WEIGHT kg 39 55 76 96 HP valve 13 bar 8 bar MIRA WATTAGE mono only LP valve 3 2 bar 110V mono 1 7 Kw Dose of ground coffee 7 gr 200V mono 2 3 Kw 3 5 Kw option 2 3 3 5 Kw 5 2 Kw Dose of water 5 à 7 cl 220V mono 380V tri N 2 7 Kw 4 3 Kw option 2 7 4 3 Kw 6 3 Kw Infusion time 20 à 25s 230V mono 400V tri N 3 Kw 4 7 Kw option 3 4 7 Kw 6 8 Kw 240V mono 415V tri N 3 2 Kw 5 1 Kw option 3 2 5 ...

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Unic Mira, Technical Note

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