Jet 6 SERVICE MANUAL - Marco Beverage Systems
Contents
1. element and inlet valve are turned OFF when this error is detected 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 2 The thermistor has failed in a closed circuit manner Action required 1 Check that the thermistor is plugged in to the PCB correctly If it is replace the thermistor OVERFILL ERROR Overfill Error NES Electronic check This indicates that the overflow water level probe has been reached The element and inlet valve are turned OFF when this error is detected This is a recoverable error When the water drops off the overflow water level probe normal operation resumes Probable causes 1 The machine is wired incorrectly e g the high level probe wire is connected to the overflow probe 2 tank has overfilled since the inlet solenoid has failed or is weeping If the machine is turned off for a long time but still plumbed in this can cause it to fill 3 he high level probe may have become coated in limescale and is allowing too much water in before it registers to stop 4 f a brew is cancelled water circulating in the plumbing will return to the tank and possibly cause it to reach the low level probe this is also more likely if the high level probe is scaled up o Bubbles from the element can cause2. Electronic check This indicates that the tank temperature has not risen in 20mins Probable causes 1 The element is disconnected or has failed Action required 1 Replace the element 2 Re wire the elements correctly 2 8kW machines should have the lower element connected WAIT LOW PRESSURE i gt Walt i Electronic check This indicates that the tank temperature has not dropped in 6mins while the inlet solenoid is trying to allow in water This is a recoverable error When water is allowed in a temperature drop will occur and normal operation resumes Probable causes 1 The water supply has been cut off or is lower than 2L min This could be a temporary event if some other appliances on the same water line is taking in a lot of water 2 The inlet solenoid may have failed or is has a wiring error Action required 1 Replace the solenoid 2 Check incoming the water supply Service Manual 1000850 1000851 20 08 14 doc Page 11 of 15 TROUBLESHOOTING GENERAL DIAGNOSTIC GUIDE The Jet 6 may have problems which the electronics are unable to detect LOW WATER OUTPUT The brew water should exit the sprayhead at approximately 2 1L minute During water calibration it should discharge 1000 12009 of hot water 960 1150ml Probable causes 1 The hose exiting the pump is kinked which restricts flow 2 Other hoses exiting the upper circulation chamber are kinked which can effect flow 3 The pump is
3. marco POURING PERFECTION Jet 6 SERVICE MANUAL Marco Beverage Systems Ltd Ireland Tel 01 295 2674 63d Heather Road Ireland Fax 01 295 3715 sandyford Industrial Estate Dublin 18 UK Tel 0207 274 4577 Republic of Ireland UK Fax 0207 978 8141 service Manual 10008502 10008514 20 08 14 doc Page 1 of 15 CONTENTS PAGE INTRODUCTION 3 SERIAL NUMBER amp MACHINE MODEL INFORMATION 3 GENERAL DESCRIPTION 4 ASSEMBLY amp PARTS DRAWINGS FRONT PANEL REMOVAL 5 TOP PANEL amp BACK PANEL REMOVAL 6 ELEMENT REMOVAL 7 SPARE PARTS LOWER amp DESCALING 8 SPARE PARTS UPPER amp DISPENSE VALVE REMOVAL 9 TROUBLESHOOTING LCD DIAGNOSTIC GUIDE 10 TROUBLESHOOTING GENERAL DIAGNOSTIC GUIDE 12 WIRING DRAWINGS WIRING SCHEMATIC 5 6kW 2 ELEMENTS OPERATING 13 WIRING SCHEMATIC 2 8kW 1 ELEMENT OPERATING 14 GENERAL SPARE PARTS LIST 15 service Manual 10008505 1000851 20 08 14 doc Page 2 of 15 INTRODUCTION The information provided in this manual is intended to assist in the maintenance of the Marco Jet 6 Brewers For basic user information amp operation of the machine please consult the User Manual which comes with the machine This manual is not a substitute for any safety instructions or technical data affixed 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 Ma
4. 2 24 1402442 Washer M4 Nylon Black 4 3x9x0 8mm 14 15 25 26 27 28 29 30 31 32 1401767 1401760 1800690 1502075 1501153 1500985 1500840 1502000 1801575 1800336 35 1801200 36 1801202 Strain Relief Screw Adjust only for 5 5kW Locknut Nylon M20 only for 5 5kW 35 or 36 37 Screw M4 x 16mm Pozi Pan Black SS Screw M4 X 10mm Pozi Pan S S Hose Water Inlet 3 4 WRC Thermal Switch Dual Pole 125Deg Socket IEC C13 10A Female Panel Mnt ELEMENT 2 8kW 230V CONTACTOR B amp J 240V AC TERMINAL 6mm 9 Q Plastic Cup Recess 34 Gasket Silicone Cup Recess Strain Relief Bush Black SR 7W 2 only for 2 8kW Descale solution can be poured into the top of the tank through the probe holes using a funnel For heavy scaling remove the cleanout door and remove scale by hand The machine can be drained via the drain at the bottom of the tank near the pump When replacing the cleanout door be careful not to overtighten the nuts as it could break the threaded studs on the tank To remove the probes take off the 4 nuts and lift the probe assembly upwards out of the The pump is held in place by a friction tank Heavy scaling on the high level probe fit in the silicone mount To remove the can cause the tank to overfill and may cause pump drain the machine fully hold the the overflow probe to be triggered silicone mount against the tank amp pull the pump directly out of the tank Applies t
5. 9e1q 3SN3dSIQ dvi Page 13 of 15 service Manual 1000850 1000851 20 08 14 doc WIRING SCHEMATIC 2 8kW 1 ELEMENT OPERATING I M 8 Z ONIYI Qc 90 t 0 SNIVW M 213 1203fOMHd Q21 1 i i 380ud WOLLOS Th al iNawa72 nm WOLLOG 8 380ud dol YOLIVLNOD a iym LNAW313 dol 380Hd gt c L 3SN3dSIQ dV anis 3Sv8 anis 3Sv8 Page 14 of 15 service Manual 1000850 1000851 20 08 14 doc GENERAL SPARE PARTS LIST refer to earlier drawings for further parts listing Part Number Description 1 10 1 0 0 8000151 Filter Paper Jet 380 152 52gsm 8000240 Urn Cleanser 800g Tub service Manual 10008502 10008515 20 08 14 doc Page 15 of 15
6. faulty or is clogged jammed 4 Incorrectly calibrated Action required 1 Check for kinks in all hoses 2 Check pump operation Although the pump may function it may not be outputting an adequate supply During calibration it should output 1000 1200g of water or if dispensing using the hot water dispense outlet it should be approximately 2L per minute The tube coming from the pump may be temporarily removed from the metal Y piece and fed directly into the basket this can rule out any plumbing issues a higher flow rate of 4 6L min will be expected from the pump when operated in this Way 3 Recalibrate the water dispense If a faulty scales is used the volume will be incorrect HIGH WATER OUTPUT The brew water should exit the sprayhead at approximately 2 1L minute During most brew cycles the solenoid valve feeding the sprayhead should close at which time no water should exit the sprayhead after a draining time of approx 10 seconds after the solenoid closes Probable causes 1 The valve feeding the sprayhead is faulty The valve mounts onto a metal tube with some silicone tube If too much tube is used it can rise up over the top of the metal mounting tube and cause the valve s plunger to be forced into an open position As both the valve and silicone tube are transparent it may be possible to see if the silicone tube is past the top of the metal tube 2 Kinks in any tubes can cause flow problems in the machine which could cause unu
7. ing fitting amp including driptray Tap Height to counter Tap Height to driptray Performance Hot Water if tap is installed Immediate Draw Off Approx 5L 0 9 litres minute Total Recovery rate at 5 6KW 0 9 litres minute 10008514 Jet 6 2 8kW Electrical Connection 2 8kW 230Vac c w 1 5m flex amp moulded plug Plumbing As above Dimensions Performance Hot Water Immediate Draw Off Approx 5L 0 45 litres minute Total Recovery rate at 2 8KW 0 45 litres minute service Manual 10008502 10008515 20 08 14 doc Page 4 of 15 Removing only the plastic panel allows access to a tank temperature port above the elements where a thermometer probe can be inserted The microsd card and tank drain hose are also accessible without removing the full metal panel This central panel is attached to the main front panel so comes off with if 4 internal supports help guide the centre panel attached to the front panel back into place A removable earth wire is in this location which can be Ensure no wires or tubes are trapped on either side when replacing the panel Ensure the side brackets do not scratch the side panels Applies to model s 1000850 amp 1000851 where is blank or one or more alohanumeric characters FRONT PANEL REMOVAL owe no JET6 030A a 20 08 14 187 Service Manual 1000850 1000851 20 08 14 doc Page 5 of 15 Ensure the brackets A removable do
8. not scratch the Remove these 4 screws earth wire is side panels in this location which can be Lift the panel temporarily upwards at disconnected the back as shown The inlet solenoid is plumbed to the tank The 2 screws can be removed so the solenoid can remain in place while the panel is removed Ensure the brackets do not scratch the side panels Removable wires are in this location which can be temporarily disconnected g Applies to model s 1000850 amp 1000851 where is blank or one or more alphanumeric characters TOP PANEL amp BACK PANEL REMOVAL pwe no JET 031A a 20 08 14 C O 187 Remove these 6 screws DESCRIPTION Service Manual 1000850 1000851 20 08 14 doc Page 6 of 15 Applies to model s 10008507 amp 1000851 where is blank or one or more alphanumeric characters service Manual 1000850 1000851 20 08 14 doc Page 7 of 15 ITEM NO PART NUMBER DESCRIPTION PART NUMBER 1 Driptray Complete JET 2 THERMISTOR ASSEMBLY 3 Valve Inlet 90 Deg 220V 2L min Probe Triple 120mm 65mm no tab 5 Label Touchscreen 3 2inch Bezel Touchscreen 3 2inch Front 7 Gasket Silicone Bezel 3 2inch P C B Touchscreen 3 2inch Complete Bezel Touchscreen 3 2inch Rear Screw M2x mm S S Pan Posi Screw M3 5x10 Pan Pozi 5 5 Self Tap 12 Cable Ribbon IDC 10way to 16Way 1m P C B Jet Control NUT 6 BRASS PILLAR SUPPORT PCB Y Piece Fitting 17 RING 4 RED SILICONE SWITCH POWER ON OFF
9. o model s 1000850 amp 1000851 where is blank or one or more alphanumeric characters SPARE PARTS LOWER amp DESCALING JET6 033A a 20 08 14 187 Service Manual 1000850 1000851 20 08 14 doc Page 8 of 15 ITEM NO PART NUMBER DESCRIPTION 1 2300024 Basket Complete 233x136mm GASKET SPRAYHEAD 186x146x6mm Push Button Metal Domed 16mm 2 1800301 gt Co 1501218 4 1502260 Solenoid 24VDC Basket Lock Grommet Silicone 4mmID 7mmPanel dia 1800402 1502147 Valve Dispense Solenoid Plug 7 1502158 vane 12mm Bore 230V 30E Vent 1502151 VALVE DUMP 240Vac Mount Panel Silicone Red 14mm alve Tube 22 2mmOD x19 8mmlD x15mm 30455 1502162 10 2301219 11 1400088 Washer M4 Nylon Black i2 4 3x9x0 8mm 1402442 13 1401767 AD gt lt lt 3 88 8 58 2 o 9 JI 3 3 x S D 3 Q 5 3 2 e O 14 15 16 17 1401830 1800545 1401000 1401150 Screw M4 6mm S S Pan Pozi Clip Hose Plastic 13mm Type E LOCKNUT 1 4 BSP BRASS NUT M6 BRASS Tube mmOD x mmID x18mmL 18 2301204 19 1800630 O a JI Co Co Hose Silicone 8mm D X 12mm To change the sprayhead dispense valve first loosen the lock nut and twist the circulation chamber as shown Place some absorbent material under the solenoid and peel back the solenoid plug A small amount of retained
10. rco 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 SERIAL NUMBER amp MACHINE MODEL INFORMATION Every unit will have a rating plate with a machine serial number The format is MMYYXXXX The first four digits of the serial number denote the month and year of manufacture The remaining four digits represent a factory assigned identification number oee example below This machine was made in June 2014 and was machine number 1234 MODEL 1000850 JET 6 SERIAL NO 06 1 4 1 234 230 240V ac 50 60Hz 9 6 6 0kW 24 4 25 4 1 21 WATER INLET PRESSURE MIN MAX 0 02 1MPa 2 9 145 MARCO BEVERAGE SYSTEMS LTD C C www marco ie i QF py mam A AmA i 4 A 4 LL Service 2 IUUUO65UZ IUUUO i iVialiuail IUUUOJOUT IUJUUQOQO IH 4 AAA DANA af 4E ZL AAC Di e e 5 f A c U U O 1 UU y IW GENERAL DESCRIPTION 1000850 Jet 6 5 6kW Electrical 5 6kW 230Vac c w 1 5m flex Plumbing Fittings 0 75 BSP Pressure Food grade inlet hose supplied 5 50 psi 35 345 kPa Standard inlet hose protrudes out 47mm measured from the flat back panel Dimensions Height Width Depth no plumbing or driptray Depth including plumbing fitting no driptray Depth including plumb
11. splashing inside the small tank which can trigger the overflow probe momentarily Action required 1 Dispense some water via the hot water outlet and see if the problem recurs 2 Descale the tank paying special attention to the high level probe 3 Check water pressure if it is too low the solenoid may allow small amounts of water in 4 Check the solenoid for debris which may cause it to jam partially open service Manual 1000850 1000851 20 08 14 doc Page 10 of 15 PROBES ERROR Probes Error He Electronic check This indicates that the high level probe has been reached but the low level probe has not been detected The element and inlet valve are turned OFF when this error is detected This is a recoverable error If the low level probe is detected normal operation resumes Probable causes 1 The low level probe is disconnected or has a faulty wiring connection The probe will not function and so the machine will fill until the high level probe is reached 2 he probes are connected incorrectly so the water reaches the first lowest probe but it is incorrectly wired as the high level probe 3 he low level probe may have become coated in limescale and is not being detected so water continues to fill the machine until the high level probe is detected Action required 1 Re wire the probes correctly 2 Repair the faulty probe connectors wiring 3 Descale the low level probe HEATER ERROR Heater Error da
12. sually high flowrates 3 Incorrectly calibrated Action required 1 Check the valve and remove and reseat it if necessary 2 Check for kinks in all hoses 3 Recalibrate the water dispense If a dry basket is used during calibration then some water may be retained in the basket giving a lower estimate If hot water is left to stand then some may evaporate giving a lower weight when weighed so the machine will dispense too much as it thinks it has a lower flowrate than it actually has GRINDER OUTPUT The grinder works on a timed basis estimating how many grams are dispensed per second During calibration if the grinder is empty and clean then grinds will cling to the grinder components and the 10 second calibration grind will dispense a lower weight than if the machine was in normal operation running for 10 seconds So before calibrating a small amount of beans should be passed through the grinder Adjusting bean type roast humidity grinder settings etc can also result in higher lower weights than expected service Manual 1000850 1000851 20 08 14 doc Page 12 of 15 WIRING SCHEMATIC 5 6kW 2 ELEMENTS OPERATING 10 M 9 S ONIYIM 9 31 1 H3520MH E 380Hd 1108 anis E 3sv8 LE 1N3W313 anis T Q WOL1LO8 3sv8 LNAWS313 dol 380Hd violet ellow Ol wees n
13. water will drain out of the chamber The solenoid can now be pulled up vertically off its metal mounting tube When replacing the valve place the plug on the valve and peel if back then twist the chamber into position and pull the plug over the large metal elbow the bottom of the chamber should be approx 76mm away fromthe spray head E The water dispense valve is held in place f by a compression fit into the silicone mount o remove the valve pull it upwards with force he metal shroud can come off and should be in place on the mount before reinsertion of the solenoid Internal Silicone below top of metal tube when Metal mount tube in place Applies to model s 10008507 amp 1000851 4 where is blank or one or more alohanumeric characters SPARE PARTS UPPER amp DISPENSE VALVE REMOVAL owe no JET 034A a 20 08 14 C O 187 service Manual 1000850 1000851 20 08 14 doc Page 9 of 15 TROUBLESHOOTING LCD DIAGNOSTIC GUIDE The Jet 6 uses an electronic diagnostic system to help determine faults If an error is detected a message is displayed through the LCD screen THERMISTOR ERROR Thermistor Error C Electronic check This indicates that the thermistor is possibly measuring such a large resistance that it assumes the thermistor circuit is open his indicates that the thermistor is possibly measuring zero resistance It assumes the thermistor has failed sort circuit
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