Service Manual 1000495 QWIKBREW 2 TWIN 03
Contents
1. 420mm ei K WHITE 0 BLA O A HIGH LEVEL PROBE J BREW LEVEL A RIBBON CABLE Ta 4 O DO O LEFT DISPLAY PCB 0000 0 1600324 A ig LC N TT NN EI 4 WAY RIBBON GABLE LOOPY gt o hr DAE O y if Sr il 3 1600326 H p 4 a a E HO e S ZHP el of EH aE ale O POB DAUGHTER El SMS _ B Ce H Si S g 3 E a Ww do a Bile H gt z AY RIBBON CABLE 7 101600317 o Ed 3 ICON 2 5 200mm S 5 lt 2 5 450mm S 5 180mm a opopopo xe y EARTH STUD ON TANK E E E E H choietg E ES BLACK SILICON 2 5 50rhm ess S SS SA BLUE SILICON 2 5 50mm SE SS SS ZS E i Zz 25 SE E 8 gs THERMISTOR o a EPa E E ASSEMBLY a S SS A SA lt amp ee 1600681 os SE ES bee ZS al SS Se aa 35 A Ss 2 S 2 a AA Sf 28 a 3 o iy E Eng ed E S y gt zo e d E3 J wD p ELEMENT nt 1500975 2 ey A EARTH STUD ON BASE BLUE 20 FLEX IN INLET SOLENCID 1502170 BLUE 0 75 152. iS f K PCB DAUGHTER J C E Wd e eege HIGH LEVEL P LOW LEVEL PR ae E Lin E fer 3 O PCB DAUGHTER O g a E HP al J x d q l E E ei E i gt o fe Dei a ber x 3 3 l m 3 AB z ch d e a V E 5 E S E i a gt d La eg Le S y 2 z E Eua E BLUE 0 75 150mm FLEX IN T ES Ki cr EARTH MAINS EARTH STUD Page 28 of 29 Marco Description WIRING DIAGRAM Dra No Q0B2T 003A Tol 10mm Drawn AD b Wire Changel06 09 05 Beverage Model 1000485 QWIKBREW 2 H Part No Scale NTS Ja te 08 04 09 a w Drawing 08 04 05 SE Bend Prog Pen Prog Approv Rev Detalls late Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc 4 Technical Data 4 14 Spare Parts List Part Number 1600326 1600323 1600317 1600324 1501540 1502170 1600691 1500975 2301300 2301326 2301304 2100275 2100290 2100155 2100185 1401170 1400550 1700260 1801560 1801570 2300085 2300350 2300175 8000240 1801511 Cup Rail Acrylic MARCO is an 1S09001 2000 Registered Co
3. Start up e Check that all installation procedures have been carried out e Turn the water on at the stop valve and switch the power on at the isolator switch The sight glass lamp will illuminate e Switch the machine on by pressing the button associated to the POWER text on the left control panel This button should be held until the red light illuminates The machine will automatically take in water To switch off press the button again Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 5 of 29 3 2 OPERATION The Marco Qwikbrew 2 Twin uses the Continous fill cycle as standard Continuous Fill Mode e Water will be taken in until the machine is full The heating begins when the quantity of water is at a safe level above the elements and stops when the machine is full and up to temperature e Once the water is up to temperature the green Ready to Brew lights illuminate approximately 50 minutes after start up A brew can be selected at this point e The Continuous fill mode essentially keeps the machine full of water regardless of temperature In this mode the machine will never run out of water but misuse e g filling buckets for cleaning can allow cold water to be served Using hot water at a faster rate than the machine can recover will result in a temperature drop in the beverage Recovery rate is approximately 1 5 pints min Heat fill mode Optional e This mode of operation
4. the front panel away from the plastics Lift the Front Panel away All the internal components are now accessible Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 12 of 29 4 4 INTERNAL ARRANGEMENT No Gesetten wel Deepen Drain Pipe 6 MainsCable e RightBrewPump 1501540 7 LeftBrewPump 1501890 TI 8 TopTray Brew Overflow pipe 9 PCB Brewer Display Right 1600324 _______________________ 10 Low Brew and High Level Probe Assembly S O Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 13 of 29 4 5 PCBs 4 5 1 PCB Layout INTERNAL PCB LAYOUT 1 PCB Brew Board Twin 2004 Marco part no 1600326 e Controls the heater switching e Switches one element only daughter PCBs switch the other elements e Controls the water inlet switching e Controls tank temperature temperature adjustment e Controls water level e Outputs to the Dual Timer PCB Outputs to the Daughter PCBs 2 PCB Timer Marco part no 1600323 e Controls the brew pump timing e Controls the Display PCBs Buttons and LEDs not shown 1600324 3 PCB Daughter Marco part no 160031 7 e Switches one element Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 14 of 29 4 5 2 PCB Brewer 2004 1600326 Y a 3 E F A e E aa EEN gt if CR aos va ps Come w i UI TIONLNOD 173 GIEOOST SHSLSAS 39 HENSE LU C
5. 2 8kW 230V elements attached to the stainless steel clean out door see below The thermistor pocket is welded into the clean out door When reassembling the clean out door element assembly ensure that the red Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 24 of 29 silicon o ring is not damaged and the tank is well sealed Check this carefully while the machine is heating up 4 11 Descaling Procedure To descale the machine thouroughly e Follow the instructions for removing the elements Attempt to remove as much scale as possible by hand through the clean out door see below Note ensure that internal components are protected ifa hose is going to be used to flush the tank e Replace the element assembly and switch on the machine Remove the cup rail and lid of the machine Add a descale solution to the tank through the large sprayhead hose shown below This runs directly into the top of the tank e Wait 20 minutes before draining and flushing the tank again Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 25 of 29 Diagram irin eo CABLE CABLE CABLE RIGHT DISPLAY PCB J1 1600324
6. incl Cup Rail Width Depth footprint on counter Depth Depth incl Drip Coffee Output 1 x Half brew 2 x Half brew 1 x Full Brew 2 x Full Brew Maximum Hourly Coffee Output Hot Water Immediate Draw Off Tra Total Recovery rate at 5 6KW QWIKBREW 2 TWIN 6kW NON STANDARD Electrical Connection 5 6kW 230Vac c w 1 5m flex Plumbing faso Dimensions As above lO Performance Coffee Output 1 x Half brew 2 x Half brew 1 x Full Brew 2 x Full Brew Maximum Hourly Coffee Output Hot Water Immediate Draw Off Total Recovery rate at 6kW Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc 0 75 BSP Food grade inlet hose supplied 5 50 psi 35 345 kPa Up to 2 84 litres 5 pints Up to 5 68 litres 10 pints Up to 5 68 litres 10 pints Up to 11 36 litres 20 pints Up to 57 litres 100 pints Heat Fill Mode Up to 15 litres 26 pints when full Continuous Fill Mode 4 5 litres 8 pints recommended max 50 litres hr 88 pints hr Up to 2 84 litres 5 pints Up to 5 68 litres 10 pints Up to 5 68 litres 10 pints Up to 11 36 litres 20 pints Up to 57 litres 100 pints Heat Fill Mode Up to 16 litres 28 pints when full Continuous Fill Mode 5 litres 8 8 pints recommended max 53 litres hr 94 pints hr Page 10 of 29 QWIKBREW 2 TWIN 8 4kW NON STANDARD Electrical Connection 8 4kW 400V 3Phase Neutral c w 1 5m flex mav ooo SS A
7. is below the low level probe which is normal when the machine fills for the first time Can be flashing for up to 5 mins at start up 2 The low level probe wire is disconnected or there is another wiring fault eg a bad earth return connection between the PCB and the Tank Action required 1 Check that the water pressure is OK and ensure that the stop valve is open 2 Check that the inlet solenoid is working 3 If the water level is above the level of the low probe check the probe circuit wiring 3 FLASH CYCLE THERMISTOR OPEN CIRCUIT Display pattern Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 21 of 29 3 quick flashes then a long delay up to 15 seconds repeated Electronic check e This indicates that the Thermistor is measuring such a large resistance that it assumes the thermistor circuit is open e The element and inlet valve are turned OFF when this error is detected e This is a recoverable error When the correct range of resistance is measured normal operation resumes Probable causes 1 The thermistor probe is unplugged from the 4way connector on the PCB or the thermistor has failed open circuit Action required 1 Check that the thermistor is plugged in to the PCB correctly If it is replace the thermistor 4 FLASH CYCLE Heat Fill Mode Only NOT HEATING Display pattern e 4 quick flashes then a short pause repeated Electronic check e This checks that the temperature is increasing when the hea
8. 1 OBPOO OLO LEVEL PROBE PROBE Y PUMP 1501540 Marco Beverage Systems Description WIRING DIAGRAM e Wa 5 NOQB2T 001A Tol Drawr AD 06 09 09 Model 1000495 QWIKBREW 2 TWIN 1 U o wet No Scale NTS DatelS 04 05 10 3 05 Bend Prog P ch Prog Approv Date Page 26 of 29 Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc O H O PCB DAUGHTER E
9. OMPONENTS OF PCB BREWER 2004 a Transformer 2 Power On Off 2way connector low voltage Looped on this machine power switch controlled through Display PCB and Dual Timer 3 LEDs 5way connector low voltage Not used on this machine 4 Data I O 4way low voltage e Connects to the Dual Timer PCB 5 Earth Tab 6 Mode of Operation selector Heat Fill Continuous Fill e The default position is no jumper or jumper away from the transformer side The default mode is CONTINUOUS FILL To change the mode to HEAT FILL move the jumper so that the two pins nearest the transformer are connected as shown in picture above Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 15 of 29 10 114 12 13 14 Water Level 5way connector low voltage e Connects to Low level High level and Brew level probes Microchip Receives inputs from Data I O 4 Mode select jumper 6 Water Level Probes 7 Thermistor 11 Temperature Range Jumper 10 Temp adjust Pot 9 and Power On 2way 2 Outputs to Data I O 4 LEDs 3 Daughter PCBs Connector 12 Triac 15 Heater Relay 13 Safety Heater Relay 14 Inlet solenoid Relay 21 Temperature Adjust Pot To increase temp adjust clockwise to decrease temp adjust anti clockwise Temperature Range Jumper Controls three temperature ranges should be on middle pins Thermistor Connector Daughter PCB Connector low voltage e Connects to Daughter
10. PCBs allows switching of more than one element Relay Heater Switches the element Relay Heater Safety Backup relay for element controls the switching should the triac fail 15 Triac In parallel with the heater relay Switches the element initially Zero voltage switching This lengthens the life of relays by removing the arc flash during switching which wears the contacts on the relay Heater Element Tab high voltage Connects to the element Live Mains Tab high voltage Inlet Solenoid Tab high voltage e Connects to the inlet solenoid Live tab spare high voltage Suppressor Relay Inlet Solenoid e Switches the inlet solenoid Fuse Neutral Mains tab high voltage Neutral Mains tab spare high voltage Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 16 of 29 4 5 3 PCB Dual Timer 1600323 D fea a i oa ace y COMPONENTS OF DUAL TIMER 1 2 eae ef dd dd dh oo bo A el DJ Connector 4way low voltage e connects to Data I O Away connector on the Brewer PCB see section 4 5 2 Microchip The version of software code is indicated when power is applied to the machine for the first time The display PCB LEDs will flash a sequence e g 2 flash pause 6flash indicates software version 2 6 Right pump time adjust pot VR2 turn clockwise to increase brew time on the right hand urn Note that with the current software version the Full br
11. Performance Coffee Output 1 x Half brew Up to 2 84 litres 5 pints 2 x Half brew Up to 5 68 litres 10 pints 1 x Full Brew Up to 5 68 litres 10 pints 2 x Full Brew Up to 11 36 litres 20 pints Maximum Hourly Coffee Output Up to 57 litres 100 pints Hot Water Immediate Draw Off Heat Fill Mode Up to 22 5 litres 40 pints when full Continuous Fill Mode 6 litres 10 5 pints recommended max Total Recovery rate at 8 4kW 80 litres hr 141 pints hr Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 11 of 29 4 2 EXTERNAL ARRANGEMENT 12 fl 11 N 4 No Description_____ No Description 2 Plastic Fascia QBT2 Twin 1801570 8 CurvedSplashback___ 3 Basket Complete QB2 2300085 9 Plastic Rose MB2T QBT2 1801560 4 Control Panel Left 10 Front Panel 5 Coffee Tap 2100290 44 Control Panel Right 6 Hot Water Tap 2100275 12 Urn Lid 2300350 4 3 ACCESS TO INTERNAL COMPONENTS To access the internal components e Disconnect the machine from the electrical supply e Allow to cool sufficiently e Remove the screw from under each of the Plastic Roses 9 above Slide the roses towards the tap e Remove the Curved Splashback 8 above by pulling out the top edge first e Remove the two screws attaching each side of the front panel to the surround 13 right Slide the front panel down Lever the top of
12. d to the machine or its packaging All information in this manual is current at the time of publication and is subject to change without notice Only technicians or service providers authorised by Marco should carry out installation and maintenance of these machines Marco accepts no responsibility for any damage or injury caused by incorrect or unreasonable installation and operation Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 3 of 29 2 SAFETY INSTRUCTIONS e Read all instructions e To protect against electric shock do not immerse mains cord in water or other liquid e To prevent chafing of the cable do not let the mains cord hang over the edge of a table or counter or touch hot surfaces e Do not operate any appliance with a damaged cord plugs or after the appliance malfunctions or has been damaged in any manner e Switch off at the mains unplug or disconnect from outlet and turn off the water supply when not in use and before cleaning Allow to cool before removing components e The use of spares and accessories not recommended by Marco may cause damage and or injuries e Do not use outdoors Do not place on or near a hot gas or electric burner e Do not use the appliance for anything other than its intended use e Save these instructions Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 4 of 29 3 BASIC INSTRUCTIONS This is a copy of the instruction manual that goes out with every uni
13. dle HH HIGH LEVEL PROBE Tow LEVEL PROBE Cc EA H Kl o 4 s H BREW LEVEL PROBE Gi i E f 2 Ld O PCB DAUGHTER Cl rr o Se S pS z le Crue E Ff f o 1600317 o z y o 5 BLACK S 480mm i d E E E A EARTH STU SS Be IC 2 T E 8 E 5 8 BLACK SILICON 2 5 feier N g 2 San E e BLUE SILICON 2 5 50mm L 2 A 2 5 a 3 E FS F w z M E T 2 E 5 Z 2 E H S a S e 3 E L a BLUE 0 a EARTH EARTH STUD ON BASE EARTH STUD ON BASE Marco Description WIRING DIAGRAM Dro No QB2T 002A Tol 7 10mm Drawn AD k Wire Change Beverage Model 1000490 QWIKBREW 2 TWIN 6Kw KRAFT Part No Scalte NTS Date08 04 05 a New Drawing systems Bend Prog ch Prog Approv Rev Details Date Ce CN 09 05 O Page 27 of 29 Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc
14. ed to give many years of trouble free service Marco Beverage Systems design manufacture and test to IS09001 2000 standard The only regular maintenance required is occasional de scaling In common with all water boiler manufacturers service calls resulting from limescale are not covered by warranty Fitting a scale reducer is recommended especially in hard water areas This can reduce the build up of scale but may not stop it altogether A service agent should descale the machine regularly The frequency that descaling is required depends on the local water supply hard water areas need more attention Marco suggest that the machine be descaled every 3 months if the unit is in a hard water area In soft water environments every 6 months should suffice Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 8 of 29 3 8 CLEANING Like any cooking utensils the coffee urns of your Qwikbrew 2 Twin must be cleaned properly and regularly Marco recommend cleaning after each days brewing using a proprietary urn cleansing compound Marco Urn Cleanser Marco Part number 8000240 is available in 800g tubs Instructions are given on each tub Your Qwikbrew 2 Twin is supplied with one large urn cleaning brush and one small sight glass cleaning brush to ensure thorough cleaning In order to clean the sightglass unscrew the small plugs on the top of the sightglass The sightglass is fragile so be careful while cleaning The exterior of these machi
15. erature will not drop significantly while brewing even when doing dual brews BUT if a large amount of hot water is used at the same time brew temperatures can be affected because cold mains water replaces the hot water used immediately Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 20 of 29 4 8 TROUBLESHOOTING DIAGNOSTIC GUIDE The Marco Qwikbrew 2 Twin uses an electronic diagnostic system to help determine faults If an error is detected a sequence of flashes is displayed through the POWER light shown in the picture below HALF Po py BREW BRE tock POWER k REA BREW The length of time and recovery method of each of these flashing displays is detailed below 2 FLASH CYCLE BELOW LOW LEVEL Display pattern e 2 quick flashes then a short pause repeated Electronic check and action e This indicates that the low level circuit is open i e the probe is not in contact with the water e The element is switched OFF at this stage and the inlet is left ON note that if this is a low probe wiring fault the water will stop at the high level probe regardless of the status of the low level e This is a recoverable error i e the machine does not need to be reset when the problem is solved e g if a closed mains water stop valve is the problem opening the valve will allow water into the machine and normal function will resume when the low level probe is reached Probable causes 1 The water level
16. eted another brew cannot be selected until the lock is disabled Note The Ready to Brew lights will still be on but no brew can be selected To disable the lock function hold the lock button for approximately 6 seconds once again 3 6 TROUBLESHOOTING The Marco Qwikbrew 2 Twin uses an electronic diagnostic system to help determine faults If an error is detected a sequence of flashes is displayed through the POWER light This sequence is repeated cycled until 1 The problem is rectified by an service agent or 2 In the case of the 6 flash cycle the machine senses that normal operation has resumed and the flash sequence ceases The number of flashes in a cycle corresponds to the symptom in the table below Note Some of the error sequences will be displayed if there is low water pressure Please check that there is water pressure and that the water stop valve is open before calling your service agent Status Diagnostic light guide No of z 7 Water level below elements Check water pressure if this is OK Normal when machine first fills call service agent Temperature sensor failure o c Call service agent Temperature sensor failure s c Call service agent Check water pressure If this is OK and the machine has not returned to normal operation after 15 min call service agent Machine not filling MEN Water not heating Call service agent 3 7 MAINTENANCE Marco machines have been design
17. ew time is double the Half brew time Current Version 2 6 Left pump time adjust pot VR1 turn clockwise to increase brew time on the left urn Note that with the current software version the Full brew time is double the Half brew time Current Version 2 6 Triac switches the left pump Wire to left Pump high voltage Live to Dual Timer high voltage looped to 5 Triac switches the right pump Wire to right Pump high voltage Timer Mode select switches only switch No 1 should be ON for this machine Connector for Right Display PCB right ribbon cable Connector for Right Display PCB middle ribbon cable Connector for Right Display PCB left ribbon cable Connector for Left Display PCB right ribbon cable Connector for Left Display PCB middle ribbon cable Connector for Left Display PCB left ribbon cable Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 17 of 29 4 5 4 PCB Daughter 1600317 Each PCB Daughter is used to switch an element The triac relay and safety relay used on the PCB Brewer is also used on the PCB Daughter This reduces wear on components 1 Live Tab connects to mains live 2 4way Connector J2 A connects to another Daughter PCB if another one used only one Daughter PCB on 5 6Kw Qwikbrew 2 Twin 3 3 4way Connector J1 e connects Daughter PCB to Brewer PCB 4H 4 Heater Tab connects to element 4 5 5 PCB Brewer Display 1600324 NOTE The Left and Right PCB Brewer Displays
18. have the same part number but the Right PCB needs to be modified on site before it can be installed The Button cap needs to removed off the second button shown below Left Display PCB Right Display PCB COMPONENTS FUNCTIONS OF LEFT PCB BREWER DISPLAY Button Lock function LED Lock function Button Power ON OFF function LED Power ON OFF and Status Diagnostic flash function LED Ready to Brew function Button Left Half Brew function LED Left Half Brew function Button Left Full Brew function LED Left Full Brew function SAA ol a el Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 18 of 29 COMPONENTS FUNCTIONS OF RIGHT PCB BREWER DISPLAY 10 Button Not Used Button cap to be removed 11 LED Not Used 12 Button Not Used Button cap to be removed 13 LED Not Used 14 LED Ready to Brew function 15 Button Right Half Brew function 16 LED Right Half Brew function 17 Button Right Full Brew function 18 LED Right Full Brew function OPERATION HEAT FILL MODE Non Standard NOTE The standard operation mode for this machine is the Continuous Fill cycle The Continuous Fill cycle can be selected by moving the Jumper J12 on the Brewer PCB above the microchip to the position nearest the transformer See Turn the water on at the stop valve and switch the power on at the wall connection Press the POWER ON button at the front of the machine A red LED next to
19. is available as an option but a service agent is required to make this change e Water will be taken in until it is a safe level above the elements At this point the water stops and heating begins Once this quantity of water is up to temperature another small quantity of cold water is taken in while the heating continues This heat fill cycle maintains the correct temperature in the tank e When the machine has enough water to brew coffee the green Ready to Brew lights illuminate after approximately 40 minutes A brew can be selected at this point but the machine is NOT full yet and will continue to fill After approximately 50 minutes the heaters will shut off The machine is now full and up to temperature e Teaand coffee is at the optimum temperature when operating under the heat fill mode 3 3 BREWING COFFEE e Slide out the coffee filter bowl and place a single sheet of filter paper in the bowl e Put the correct amount of ground coffee into the filter paper Your coffee supply company may have pack sizes to suit the brews of your new Maxibrew 2 Twin if not as an approximate guide for your first brews 110g 120g 4 4202 for a Half Brew 5 pints 2 85 litres 220g 240g 8 8202 for a Full Brew 10 pints 5 7 litres Depending on the coffee grind and roast and on water quality you may have to adjust these quantities to obtain the optimum flavour e Level off the surface of coffee by gently shaking the filter bow
20. l Slide the coffee filter bowl into the guide rails in the brew head and push fully home Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 6 of 29 e Select the correct brew on the relevant control panel e g left control panel if the left urn being used by pressing either the Half Brew switch for a 5 pint brew or the Full Brew switch for a 10 pint brew Press the switch until the amber light illuminates If you make a mistake press the Power switch to turn the machine off Wait 3 seconds and turn back on again Select the correct brew e A half brew should take around 4 min 4 min 45 secs A full brew should take around 8 mins 9 mins 30 secs These depend on the set up of the machine factory Note A service agent can set the machine up so that different brew times are available in each urn for different strengths types of coffee Half brew times can be varied from 3 mins 10 seconds to 7 mins 10 seconds and Full brew times can be varied from 6 mins 10 seconds to 14 mins 10 seconds e Remove the filter paper with the spent grinds as soon as possible after brewing Note allow time for all the coffee to drain from the filter bowl before removing e A brew should only be selected whenever the green Ready to brew lights are illuminated e Left and right brews can run simultaneously although the two brew buttons should not be depressed at exactly the same time Press and release one brew button before doing
21. marco POURING PERFECTION QWIKBREW 2 TWIN BOILER BREWER SERVICE MANUAL Marco Beverage Systems Ltd 63d Heather Road Sandyford Industrial Estate Dublin 18 Republic of Ireland CONTENTS PAGE 1 INTRODUCTION 3 2 SAFETY INSTRUCTIONS 4 3 BASIC INSTRUCTIONS 5 3 1 Installation Details 5 3 2 Operation 6 3 3 Brewing Coffee 6 3 4 Hot Water 7 3 5 Lock Function 7 3 6 Troubleshooting 8 3 7 Maintenance 8 3 8 Cleaning 9 3 9 Safety 9 4 TECHNICAL DATA 10 4 1 General Description 10 4 2 External Arrangement 12 4 3 Access to internal components 12 4 4 Internal Arrangement 13 4 5 PCBs 14 4 5 1 PCB Layout 14 4 5 2 PCB Brewer 2004 1600326 15 4 5 3 PCB Dual Timer 1600323 17 4 5 4 PCB Daughter 1600317 18 4 5 5 PCB Brewer Display 1600324 18 4 6 Operation Heat Fill Mode 19 4 7 Operation Continuous Fill Mode 20 4 8 Troubleshooting Diagnostic guide 21 4 9 Level Probes 23 4 10 Elements 24 4 11 Descaling procedure 25 4 12 Wiring Diagram 26 4 13 Spare Parts List 29 Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 2 of 29 1 INTRODUCTION The information provided in this manual is intended to assist in the installation and maintenance of the Marco Qwikbrew 2 Twin Boiler Brewer Please read the instructions carefully to prevent accidents and ensure an efficient installation This manual is not a substitute for any safety instructions or technical data affixe
22. mpany Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 29 of 29
23. nes may be cleaned with a damp cloth and a light detergent Do not use abrasive cloths or creams as this will spoil the finish of the machine Do not use a water jet or spray Beware of accidentally operating the draw off taps when cleaning the front of the machine 3 9 SAFETY e This appliance must be earthed e Risk of flooding The hose supplied with this unit is non toxic food quality tested to 190psi However a hose is not a permanent connection Itis therefore advisable to switch off boiler and close the stopcock valve when boiler is not in use e g overnight weekends etc e Risk of scalding Beware of accidentally operating the water drawoff tap especially when cleaning the front of the boiler ALL users of this machine should be trained and should be aware that the machine dispenses very hot beverages e The utmost care has been taken in the manufacture and testing of this unit Failure to install maintain and or operate this boiler according to the manufacturer s instructions may result in conditions that can cause injury or damage to property If in any doubt about the serviceability of the boiler always contact the manufacturer or your own supplier for advice Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 9 of 29 4 Technical Data 4 1 GENERAL DESCRIPTION QWIKBREW 2 TWIN 5 6 kW STANDARD Electrical Connection 5 6kW 230Vac c w 1 5m flex Performance Fittings Pressure Height Height
24. nk up to a sprayhead and into the filter basket The coffee runs out of the filter basket into the urn Since the water tank surrounds the urn the brewed coffee is kept at temperature The heat fill cycle ensures that the temperature in the tank does not drop by more than 3 degrees The machine will only allow small amounts of cold water into the tank while continuing to heat to ensure that the temperature does not drop too low If more hot water is used than the machine can recover approx 0 85 L min 5 6 kW the amount of water in the tank decreases If the full quantity of Hot Water is drawn off the machine will take approximately 15min to recover back up to the high level probe Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 19 of 29 When two brews are running simultaneously the level of the water in the tank does drop slowly because the machine is using water at a quicker rate than it can heat If dual brews are selected at a point where the level of water will drop off the BREW SAFETY LEVEL PROBE the current brews will be completed but a recovery period will be necessary before new brews can be selected After a recovery period up to 15 mins the machine will be ready to brew once again In the HEAT FILL mode drawing off Hot Water while brewing Coffee should not affect the quality of the brew The machine naturally gives priority to the coffee The machine will effectively run out of hot water no water will be available o
25. ot kept ON for more than 1min30secs when in the heat fill cycle Note this error is only checked Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 22 of 29 once the water level has reached the low level probe and the machine has begun the heat fill cycle e This is a recoverable error In the heat fill cycle even with reasonably low water pressure the inlet solenoid valve usually only stays ON for approx 5 6 seconds If the inlet valve stay ON for more than 1min 30secs there is a problem with the inlet valve or the mains water supply After 1min30seconds the 6 flash cycle is displayed for 2 mins the inlet solenoid valve is turned OFF during this time After this 2 min cycle normal operation resumes i e the machine attempts to fill by opening the inlet solenoid valve once more If after 1min30secs no water has come into the machine the 6flash sequence is displayed again This cycle is repeated Probable causes 1 Mains water pressure problem or the mains water stop valve is closed 2 Inlet solenoid valve failure Action required 1 Check the mains water supply If it is good wait 5minutes to check that the error cycle is continuing 2 If the mains water supply is good check that the inlet solenoid valve is working 4 9 Level Probes The level probes provide much of the control inputs into the PCB and are critical to the operation of the machine The wiring to these should be checked regularly and the probes themselves sh
26. ould be cleaned whenever the machine is serviced There are 3 level probes on the Qwikbrew 2 Twin e Low Level Probe e High Level Probe Brew Level Probe All the probes are mounted on one assembly on the top right side of the tank The pictures below show how to remove this assembly The Level Probe assembly is shown in the picture The probes are mounted above the water line and have stainless steel tabs that hang down to the level required Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 23 of 29 Level Probe Assembly in picture on right e The low level probe has the longest tab 210mm When in position the bottom of the tab rests in a safe position above the elements The brew level probe has a 140mm long tab A brew can be selected and will complete safely when the water level has reached this probe A brew cannot be selected below this level e The high level probe has the shortest tab 40mm 4 10 Elements Removing the elements e Drain the machine o remove the top hoseclip off the drain hose loop 1 in picture below o carefully pull the hose off the top elbow o squeeze the silicon hose near the bottom and quickly pull the upper part of the hose out from the machine and place in the drain facility Remove the element assembly clean out door 2 in picture below by unfastening the 8 brass nuts Slide the element assembly through the clean out opening The element assembly consists of two
27. t 3 1 INSTALLATION DETAILS Electrical installation Electrical specification 5 6 kW 230V ac amp 6 kW 230V ac e This unit must be connected to a suitable single phase power supply with reference to the rating plate This should be done by a qualified electrician Electrical specification 8 4kW 400V ac 3 PHASE e This unit must be connected to a suitable 3 phase power supply with reference to the rating plate This should be done by a qualified electrician e When power is applied to the machine the LEDs on the display PCB will flash a number of times this indicates which version of software code is in the machine Plumbing installation procedure Note Marco recommend that this machine be positioned on a counter with a drainage facility Marco cannot be held responsible for any flood damages e Mains water pressure required limits 5 50psi 35 345kPa e Fita stop Valve on a cold water line and attach a 3 4 BSP male fitting e g 3 4 x 1 2 311 or washing machine type stop valve e Connect straight tailpiece of the inlet hose to the stop valve fitting Make sure that the pre attached sealing washer is fitted e Turn on the water to flush any impurities dust etc from the inlet hose and water pipe Allow several gallons through e Connect right angled tailpiece of the hose to the inlet valve of the boiler again 3 4 BSP Make sure the sealing washer is fitted here also e Turn on water and check for leaks
28. ter is on Measures the rate that the temperature increases in a specified time This error is only displayed after 20 mins of the heater being on continuously When the error is detected the element and inlet valve are turned off e This is anon recoverable error The machine needs to be reset when this problem is solved Probable causes 1 All the elements have failed 2 Wiring fault Action required 1 Check that the resistance on the elements If there is a reasonable resistance 15 25Q on the element it probably has not failed so the wiring might be at fault NOTE for this error to be displayed all elements would have to fail 5 FLASH CYCLE THERMISTOR SHORT CIRCUIT Display pattern e 5 quick flashes then a short pause repeated Electronic check e This indicates that the Thermistor is measuring zero resistance It assumes the thermistor has failed sort circuit The element and inlet valve are turned OFF when this error is detected e This is a recoverable error When the correct range of resistance is measured normal operation resumes Probable causes 2 The thermistor has failed Action required 2 Replace the thermistor 6 FLASH CYCLE Heat Fill Mode Only NOT FILLING Display pattern e 6 quick flashes then a short pause repeated for approx 2min Then normal function resumes for 1min30secs then flashes for 2min again this cycle is repeated Electronic check e This checks that the inlet solenoid valve is n
29. the button will illuminate and the machine will start to fill This LED will flash a 2 flash cycle while the water level is below the low level probe Note The machine will not heat until the water has reached the low level probe When the low level probe is reached the water inlet is stopped and the element is switched on This water is heated to the pre set temperature 92 94 5 C The machine takes in another small body of water while continuing to heat This method of staggered filling heat fill cycle ensures that the temperature in the tank remains within 3 degrees of set temperature This heat fill cycle continues until a the water level reaches the high level probe and b the water temperature reaches the pre set temperature as above Note When the level of water is at a safe height above the low level the green READY TO BREW light illuminates This indicates that the machine has enough water to run a brew and is at the correct temperature The machine is NOT full at this level and will continue to fill A brew can be selected at this point Unless a brew is selected the full quantity of hot water should be available within 15 minutes of reaching this level The machine is ready to brew Coffee and up to 15 litres of Hot Water is available for immediate draw off when the machine is full and up to temperature There is one large water tank with two urns recessed into it When a brew is selected hot water is pumped from the ta
30. the same on the other side Note The Maximum hourly coffee output is 108 Pints 61 Litres for Continuous Fill and 108 Pints 61 Litres for Heat Fill 3 4 HOT WATER e When the machine is full up to 17 5 pints 10 litres of water is available for tea etc If all this water is used and no water is available at the hot water tap the machine should be left for a short while to recover Heat fill mode The recovery rate of this machine is approximately 17 pints 0 87 litres per minute at 5 6 kW e Using hot water at a faster rate than the machine can recover will result in a temperature drop in the beverage Continuous fill mode Note A brew can still be selected after all the hot water has been drawn off the hot water tap While the machine is brewing however the hot water recovery rate is reduced and the machine will take longer to replenish the hot water supply 3 5 LOCK FUNCTION The Qwikbrew 2 Twin has a button lock function to prevent untrained personnel operating the machine or accidental misuse by trained personnel If the lock button left hand side control panel is pressed for approximately 6 seconds a red light next to the button will illuminate Both control panels are now locked No buttons are operational when the lock function is enabled The machine will operate as normal Service Manual 1000495 QWIKBREW 2 TWIN 03 05 06 doc Page 7 of 29 i e if the machine is brewing it will continue to brew Once compl
31. ut of the hot water tap but brews will still be finished 4 7 OPERATION CONTINUOUS FILL MODE Turn the water on at the stop valve and switch the power on at the wall connection Press the POWER ON button at the front of the machine A red LED next to the button will illuminate and the machine will start to fill Note The machine will not heat until the water has reached the low level probe When the water level is below the low probe the Power LED flashes the diagnostic 2 flash cycle When the low level probe is reached the element is switched on The machine continues to fill until the high level probe is reached This means that the machine is full of cold water at this point The water is heated to the pre set temperature 92 94 5 C The continuous fill cycle is complete when the green Ready to Brew light is on A brew can now be selected Note Once again the Green Ready to Brew light indicates that the machine is at a safe level and up to temperature but in this case the water has filled to the high probe already so the machine will be full and up to temperature when the light comes on for the first time Unlike the Heat Fill mode the machine will fill with mains water as soon as the water level drops off the high level probe The machine will always be full of water but the drawback is that if operators draw off too much water from the hot water tap the temperature of the beverages can be affected The brew temp
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