Marco Beverage Systems Ltd
Contents
1. 2087 Valve inlet Solenoid 1502190 K 7 Low Level Probe Assembly 2300463 ELEMENT 2 4kW Thermistor Pocket U Shape 230V 1500950 2300765 Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 7 of 18 4 4 ACCESS INTERNAL COMPONENTS Service Manual Ecoboiler wallmount 1000671 100676 061010 1 ANY MAINTENANCE WORK ON ANY ECOBOILER PRODUCT SHOULD ONLY CONDUCTED A TRAINED SERVICE ENGINEER Removal Disconnect the machine from the electrical supply Allow to cool sufficiently The removable Side Panels are fixed at the top of the machine Unscrew with a Philips head screwdriver Remove the panels in an upward and outward motion Reassembly To re attach the side panels complete the removal actions in steps 4 amp 5 in reverse order Ensure that the panel screws are securely fastened Page 8 of 18 Inlet Solenoid Access e To access the inlet solenoid Unscrew the two cross recessed pan headed screws holding the bracket in place 4 5 PCBs 4 5 1 PCB Layout Internal PCB Layout Jj SUN a y 1 d 3 o G f LI UE i PCB Ecoboiler Control 1600345 e Controls the heater switching e Controls the water inlet switching e Controls tank temperature temperature adjustment PCB Ecoboiler Display 10L 1600349 consists of e Power On Off button e Power On LED e Status Ready LED e ECO Mo2. CE Marco machines have been designed to give many years of trouble free service Marco Beverage Systems manufacture and test to 509002 2000 standard The only regular maintenance required is occasional de scaling Service Manual Ecoboiler wallmount 1000671 100676061010 Page5of18 3 6 CLEANING The exterior of these machines 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 tap or push button when cleaning the front of the machine 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 The frequency that descaling is required depends on the local water supply hard water areas need more attention A scale reducer can reduce the build up of scaling but may not stop it altogether Descaling of the machine should ideally be carried out by qualified service personnel 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 a permanent connection It is therefore advisable to switch off boiler and close the stopcock valve when boiler is not in use e g overnight weekends etc
3. Eco Mode On Of Switch 5 way connector to PCB Ecoboiler LED connector 4 way connector to PCB Ecoboiler BUTTONS connector on0BROMI 4 6 TROUBLESHOOTING DIAGNOSTIC GUIDE 2 FLASH CYCLES BELOW LOW LEVEL Display pattern e 2 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 e 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 Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 11 of 18 Probable causes 1 The water level is below the low level probe which is normal when the machine fills for the first time Can be flashing for up to 2 min at start up 2 The low level probe wire is disconnected or there is another wiring fault e g 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
4. T MARCO is an 509001 2000 Registered Company Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 18 of 18
5. and attach 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 litres through e Connect the hose to the inlet valve of the boiler again 3 4 BSP The orientantion of the tail piece will vary depending on whether machine is plumbed at the rear or at the underside o When the machine is plumbed from the rear connect right angled tailpiece to the inlet valve of the boiler again BSP o When the machine is plumbed from the underside connect non angled tailpiece to the inlet valve of the boiler again BSP e Make sure the sealing washer is fitted here also e Turn on water and check for leaks 3 2 OPERATION e Check that all installation procedures have been carried out e Ensure water valve is on and there is power to the appliance e The Reagy Status light will cycle two red flashes while the machine is filling to the safe level e After this amount of water has heated to about 96 C the boiler will draw more water in until the temperature drops by 1 or 2 degrees The boiler will then heat again This heat fill cycle continues until the boiler is full e Whilst the machine is above the safe level and filling the Ready Status light will remai
6. de On Off Button e Mode On LED PCB Ecoboiler Display 101 1600349 PCB Ecoboiler Control 1600345 Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 9 of 18 4 5 2 Control COMPONENTS ECOBOILER CONTROLLER 2008 Dispense Solenoid Tab Inlet Solenoid Tab Neutral Tabs Transformer Mains Live In Tab D mode we uet Relays Heater e Switch the element Heater Tab 8 On Off 2 way Connector TM e Short circuited on this Ecoboiler machines power switch controlled through the display PCB 9 LED 5 way Connector 10 Earth Tab 11 Daughter PCB Connector low voltage Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 10 of 18 e Connects to Daughter PCBs allows switching of more than element 12 External Connector 13 Thermistor Connector 14 Dip Switch way Allows selection of software for specific machine 15 Tactile Switch For use during calibration procedure refer to Calibration in Sec 3 3 16 Water Level 5 way connector low voltage Connects to Low level and high level probes Also connects push button on PB variants 17 Button Connector 4 way 18 Data I O Connector 4 way 19 Relays Inlet Solenoid 4 5 4 Display Ecoboiler 10L 1600349 Power On LED s shows that machine is switched on Power On Off switch Status LED s displays Error signals via a flashing RED LED 2 Eco Mode On LED s
7. e Risk of scalding Beware of accidentally operating the water draw off tap especially when cleaning the front of the boiler 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 4 Technical Data 4 1 GENERAL DESCRIPTION ECO Boiler WMT3 WMPB3 WMT5 WMPB5 WMT3 WMPB3 WMT5 WMPB5 Dimensions Height mm 447 447 447 447 Width mm 325 325 325 325 Depth mm 222 222 222 222 Performance Immediate Draw Off litres 5 6ltr 5 6ltr 5 6ltr 5 6ltr Max Hourly Output 24ltr 24ltr 24ltr 24ltr litres hour Electrical Connection 2 4kW 230V Plumbing Fittings 0 75 BSP Pressure Food grade inlet hose supplied 5 50 psi 35 345 kPa Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 6 of 18 4 2 EXTERNAL ARRANGEMENT Top tank access Lid Side Panel Fixed centre panel Tap Push Button 4 3 INTERNAL ARRANGEMENT PCB Ecoboiler Control 1600345 PCB Bracket High Level Probe Assembly 2300463 Mid Level Probe Assembly 2300463 M Terminal Mains Connector NC X D 1 LLL O EN 1502011 Thermal Switch 130Deg 150
8. f WZ00 MOD4 ONEMI 1033834 01 01 90 2WJ Ag NMYAG 9 aid 1lOgOOd 9290001 WVAOVIG ONIAIM Nouasosao 2 A uu uuuozi 1 MOTIBA N333O uwozz 0 MOTHA uu0 e MOTISA N3833O 039NY3O uwose s z ana HOLMS NOILISOd HO NO HOLMS diq S31VOIONI 38 vnos 3ov18 uuuugge 318 vO AVM S 318v2O uwose NMO38 uiuugee MOTI3A 920 3n18 17 18 Service Manual Ecoboiler wallmount 1000671 100676 061010 Description Model Variant Number T3 1400550 Circlip for Tap 1401170 Nut Chromed for Tap 1500950 ELEMENT 2 4kW 230V 1501217 PushButtonMetal280V 1502156 Valve Dispense Solenoid Muller 1502190 ValvelnletSolenoid 1600345 PCB Ecoboiler Control Rev2 0 1600349 PCB Ecoboiler Display 10L Rev 1 0 _ 1600691 Thermistor Assembly 2100279 TapHotWater 1 11 2301463 Level Probe Assembly 8000240 Urn Cleanser 8009 Tub 8800121 DescaleBox 6Packs 1500470 O RING CLEANOUT DOOR 1501217 PushButtonMetal230V Part Description Model Variant Number PTTL em TE TTE ECOW 021F Right Wing ECOW 012F ECOW 019F THERMAL SWITCH BRACKE
9. in water from machine drain hose is located at the base of the machine which is accessible by removing right side panel Use ScaleKleen Marco part No 8000270 or similar Follow instructions carefully Remove lid located on the top of machine Remove insulation Using a nut spinner remove clean out plate Thoroughly clean and flush the machine before re use Reassemble clean out door adding a new O ring Follow installation and first time operation instructions Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 15 of 18 Wiring Diagrams 4 9 E D N ccn SCHO 01 0 01 JOWN V100 MO23 01 0 0l V2WJ A8 GIWM 49108023 1790001 WV3OVIQO ONIMIM 001 S MOTBA N333O rm uwose NMO38 uwose ana uuuuoee 33849 6 MOTI3A uwoze 70 uuuugez MOTA 3a vnos 3ov1g I 2 E HOIIMS m 5 5 I d NOILISOd 8 zZ HO NO HOLIMS 3 did S3lVOIONI 3 E 3 3 3 1 0 AVM S 1 0 NOIX AYM Page 16 of 18 Service Manual Ecoboiler wallmount 1000671 100676 061010 10 Q SVINN NOISIA38 D N S23 I3WITIIW NI SNOISN3WIG SSIINN 01 01 90 f
10. marco POURING PERFECTION Ecoboiler WMT5 Ecoboiler WMPB5 Ecoboiler WMT3 Ecoboiler WMPB3 Marco Beverage Systems Ltd Ireland Tel 01 295 2674 a earra d Ireland Fax 01 295 3715 Sandyford Industrial Estate Dublin 18 UK Tel 0207 274 4577 Republic of Ireland UK Fax 0207 978 8141 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 Service Manual Ecoboiler wallmount 1000671 100676 061010 4 5 1 4 5 2 4 5 3 INTRODUCTION SAFETY INSTRUCTIONS BASIC INSTRUCTIONS Installation Details Operation Calibration Troubleshooting Maintenance Cleaning Limescale Cautions and Safety Tips TECHNICAL DATA General Description External Arrangement Internal Arrangement Access to internal components PCBs PCB Layout PCB Ecoboiler Control 1600345 PCB Ecoboiler Display 10L 1600349 Troubleshooting Diagnostic guide Tank Components Descaling procedure Wiring Diagram 1000671 Ecoboiler WM5 Spare Parts List PAGE A 2 18 1 INTRODUCTION The information provided this manual is intended to assist in the installation and maintenance of the Marco Ecoboiler Wallmount Range 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 affixed to the machine or its packaging All information in this manual is current at the time of publication and i
11. n blank The Ready Status light will glow green when the machine is both full and up to normal operating temperature e The boiler is now ready for use NOTE Because the boiler is electronically controlled no priming is necessary The element cannot switch on until a safe level of water is reached Ecomode Button s Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 4 of 18 3 3 CALIBRATION The Ecoboiler control PCB 1600345 has the ability to have the desired set point temperature at whatever setting is required During manufacture of the PCB it is set to the default temperature of around 95 C If the temperature setting needs to be modified on site please follow the steps below 1 To Enter Calibration mode a Turn the machine off at the mains power supply b Then whilst depressing the tactile switch on the PCB turn the mains power back on c All available LED s on the front panel will now blink continuously d The machine is now in Calibration mode 2 In Calibration Mode the machine will heat continuously until the tactile switch on the PCB is pressed for a second time NB The tactile switch should be pressed for at least 1 second 3 Using a thermometer to measure the temperature at the thermistor pocket the machine should be allowed to reach the desired set temperature NB It may be necessary to let the unit cool down if the desired set point is lower than the units current tempe
12. rature 4 Following a correct calibration procedure the tank temperature should be maintained within 3 C of the desired set point temperature In the event of an incorrect calibration process the steps below should be followed 5 Ifthe tactile switch is pressed too early and the temperature is set lower than desired the tester should simply repeat calibration 6 Ifthe tactile switch is pressed too late and the set temperature is too high the tester will need to wait for the temperature in the tank to cool or add cool water and then repeat calibration 3 4 TROUBLESHOOTING The Ready Status light signals various errors or problems A cycle of red flashes indicates an error The number of flashes in a cycle corresponds to the symptom in the table below Status Diagnostic light guide No of flashes Symptom Action required Water level below elements Normal Check water pressure if this is OK then call when machine first fills service agent Temperature sensor failure 0 c Call service agent Water not heating Call service agent Temperature sensor failure s c Call service agent Check water pressure If OK switch machine off Machine not filling and on again If problem reoccurs call service agent 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 3 5 MAINTENAN
13. s 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 2 SAFETY INSTRUCTIONS e Read all instructions 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 Ecoboiler wallmount 1000671 100676 061010 Page 3 of 18 3 BASIC INSTRUCTIONS 3 1 INSTALLATION DETAILS Electrical installation 2 4 o Suitable cabling and fusing for 2 4 3 kW circuit Ensure the machine is fully earthed Plumbing installation procedure Note Marco recommend that this machine be positioned over a counter with a drainage facility Marco cannot be held responsible for any flood damages e Mains water pressure required limits 5 50 35 345kPa e Fita stop Valve on a cold water line
14. so the wiring might be at fault Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 12 of 18 5 FLASH CYCLE THERMISTOR SHORT CIRCUIT Display pattern e 5 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 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 has failed Action required 1 Replace the thermistor 6 FLASH CYCLES NOT FILLING Display pattern e 6 flashes then a short pause repeated Electronic check e This checks that the water the tank cools when the inlet solenoid valve is switched on e This is a non recoverable error This checks that the water in the tank is cooled by when the inlet solenoid valve is opened If the water pressure is within the specifications 5 50psi the inlet solenoid should be on for more than a few seconds If this water temperature has not decreased by the required amount e 1 degree per minute the inlet solenoid is switched off and the 6 flash cycle is displayed 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 Note Temporary loss of water pre
15. ssure can occur in certain sites particularly when various machines are plumbed to the same mains water supply If the water supply is ok reset the machine switch the machine Off and On again This will reset the error and if the water supply is ok the machine will return to normal operation NOTE If the water supply is the problem ensure that this is rectified or this error will re occur 2 If there is no problem with the mains water supply check that the inlet solenoid valve is working Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 13 of 18 4 7 Tank Components The tank internals are detailed below Care should be taken when cleaning inside the tank 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 should be cleaned whenever the machine is serviced Overflow Pipe Probe Assembly 2300463 high position Water inlet Probe Assembly 2300463 eco position Thermistor Pocket ensure that this is not touching the element Element 1500985 Outlet Probe Assembly 2300463 low position Service Manual Ecoboiler wallmount 1000671 100676 061010 Page 14 of 18 4 8 Descaling Procedure Descaling Procedure Isolate machine from power supply Isolate machine from water supply ALLOW TO COOL COMPLETELY Dra
16. the level of the low probe check the probe circuit wiring FLASH CYCLE THERMISTOR OPEN CIRCUIT Display pattern e flashes then a short pause 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 CYCLES NOT HEATING Display pattern e 4 then a short pause repeated Electronic check e This checks that the temperature is increasing when the heater 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 The elements have failed 2 Wiring fault Action required 1 Check that the resistance on the elements If there is a reasonable resistance 15 250 on the element it probably has not failed
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