Grindmaster LCD-2R User's Manual
Contents
1. 19 Model LCD 2R 2 19 GRINDMASTER CORPORATION Grindmaster Coffee Grinders and Brewers e PrecisionBrew Brewing Systems e Espressimo Espresso Machines Crathco Hot Beverage Dispensers e Crathco Cold and Frozen Beverage Dispensers e AMW Coffee and Tea Systems Tel 502 425 4776 Fax 502 425 4664 1 800 695 4500 USA amp Canada only P O Box 35020 Louisville KY 40232 USA www grindmaster com e email info grindmaster com Grindmaster Corporation 2009 0910 Form AM 328 04 PRINTED IN USA Part 635432. A WARNING Draining of tank should be performed by a qualified service technician The tank contains 4 gallons 15 1 litre of very hot water May cause severe burns 1 Prepare a minimum 5 gallon 17 5 litre heat resistant container to drain the tank water into 2 Unplug the machine 3 Remove the drain tray and front access panel 4 Locate the silicone drain hose Put the end of the drain hose into the bucket Secure the end of the drain hose i e with tape into the bucket 5 Remove the hose clamp and plug 6 Allow the tank to drain completely WARNING Do not attempt to stop the flow of water once it begins to drain 7 Once the tank is empty securely replace the plug and clamp on the end of the hose Reposition the drain hose inside the hose clip on the left side wall 8 Reassemble the front access panel and drain tray Purging Machine of all Water for Shipment in Cold Areas A WARNING This procedure should be performed by a qualified service technician The unit can be purged of water as follows 1 Turn the power switch to the OFF position 2 Drain the water tank refer to instructions above Do not replace the drain hose plug and clamp until further instructed 3 Turn the power switch to the ON position The display should indicate lack of water within 12 seconds The 12 second delay signals that the heating element has been disabled due to the lack of water in the tank after it is drained Im
3. 7 Leak If the machine refills 15 times without a dispense the machine assumes a leak A water outlet valve may be leaking 8 Inlet valve leak Not available with single inlet valve machines 9 Tank thermistor fail The thermistor has failed open circuit or connections from the thermistor to the PCB may have failed 10 Reset System The watchdog timer on the control chip has timed out the machine needs a reset Turn machine off wait 5 sec onds turn back on Programming Guide for Calibration of Mix Ratio refer to Figure D 1 The water dump valves are factory set to 60 ml sec 2 fl ounces per second If adjustment is required disconnect power to the machine and remove the left side access plate to gain access to the dump valves 2 Using an appropriate hex key turn the adjustment screw on each dump valve clockwise to fully close the adjustor Do not force the adjustment as permanent damage can occur to the valve 3 Turn each dump valve adjustor counter clockwise as indicated below to achieve 2 fl ounce per second Top valve Left dispense head 5 5 turns out CCW Figure D Middle Middle dispense head 4 5 turns out CCW Bottom valve Right dispense head 4 0 turns out CCW 4 Reassemble machine and power ON 11 Model LCD 2R and LCD 2A Engineer Program Settings TO BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN ONLY Programming Guide for Calibration of Mix Ratio cont
4. Install a taste and odor filter to the water inlet of the machine concentration or stale water Water tank requires descaling Drain water from tank remove tank remove tank and de scale thoroughly rinse tank before re installing Flush tank with fresh water several times before replacing in service Out of date coffee concentrate Check date stamp on product container 18 Model LCD 2R LCD 2A 49018 TIWNIIAHGLL O NIXIM H LIMS AJANYLS Wiring Diagram OMY p LNAWATA HOM 0691 HOA 021 104 Z1 O UUOD 01 HOM 0099 OYZ 10 UMOUS SD 21 OF JOBULOD YOLSINYSHL 3sNadsid YOLSINYSHL Q HOLOVINOO wn x18 ETO O H31VM SATA 131100 334409 SNILVTnO93H Oja zL 109 1 j e 1V1S L MHOSN3S 9 1 LINH NEM uoo W1g us IATA HOLIMS lvold Alddns N AV ISH OPA ZL IN3W313 SANTA ivols 5 19110 AW1dSId 091 HOLSIAH3HI 27000 IOHINOO 5 HOSN3S vOudO WOlLdO 333309 4vo3a YOSNAS WNNOVA dvoaa ANSAW314 SNIIOOD Yall Tad yndu NYL dNLas L j HM HOLIMS
5. Temperature setting too high for elevation of installation Adjust temperature down refer to temperature adjustment in Operators Manual Heater contactor stuck in closed position Check contactor for welded contacts replace if necessary Defective thermistor Check for flashing diagnostic lights on control board and refer to explanation of diagnostic LEDs WATER CONTINUES TO DRIP FROM DISPENSE SPOUT Weeping dispense valve Replace dump valve CONCENTRATE CONTINUES TO DRIP FROM DISPENSE SPOUT Peristaltic pump tube is worn out Call for service Incorrect tubing installed Confirm that tubing is OEM part replace if necessary DRINK IS TOO WEAK OR STRONG Mix ratio needs adjustment Refer to Setup section of programming guide to alter Coffee and Decaf ratios Blocked pump and delivery tubing too weak Follow cleaning instructions to prevent restrictions inside pump tubing Pump tubing is worn out too weak Replace tubing on an as needed basis depending on usage DRINK IS TOO HOT OR COLD Refer to Setup section of programming guide to alter water tank temperature Consider providing hot water to the supply inlet to maximize recovery H SUME MEUS Consider having the machine converted to 240V operation for maximum recovery time OFF TASTE OF COFFEE Machine needs cleaning Follow cleaning instructions to ensure concentrate delivery tubing is clean Poor water quality to include high chlorine level heavy mineral
6. the regular coffee by using the up and down but tons located to the left of the keyswitch Once the required ratio is chosen press Enter Figure C Decaf Ratio The user can also set the Decaf ratio same procedure as above Portion Control The up and down keys toggle between Enabled and Disabled When disabled all selections made by the taps will be continuous until the tap is released When enabled the taps will give a pre determined dispense volume If portion control is enabled the next screen will ask you to pull the tap of the selection to set once chosen you then set the portion size this can be set one of two ways Dispense into vessel Place vessel to be filled underneath nozzle and press and hold tap the machine will dispense water into the vessel and the display will start counting up in 10ths of a second 50 5 seconds Once the correct level is reached release the tap If the level is correct then note the number on the display if incorrect then discard the water from the vessel and start again Use Up and Down buttons If by past experience the number for the desired volume is known then the volume can be set by pressing and holding the up and down buttons to set the count number Once the portion for the selection is set you can set another by pulling the relevant tap or press enter to set the Override portions You will now be asked to set the Override portion this is the portion dispensed i
7. To check water flow rate and calibrate the actual mix ratio adjustment to match the programming mix ratio IMPORTANT NOTE REGARDING PORTION OVERRIDE BUTTON The default time setting for the override portion is 100 which equates to 10 0 seconds The override dispense volume should be set to 100 10 0 seconds for calibration purpos es Follow the programming guide to determine and change the setting to 100 for calibration purposes A WARNING A dispense time greater than 10 seconds will require a graduated beaker larger than 1000ml in order to safely catch the dispensed HOT water Disable the concentrate pumps by entering the setup mode as indicated above This will allow determination of the exact water delivery for a 10 second dispense Override portion button Press and release then activate desired dispense switch within 5 seconds for a 10 second dispense cycle 2 Using a 1000ml beaker ensure override time setting is set to 100 for a 10 second dispense push and release the hidden override portion button located on the bottom left side of the door as shown above Within 5 seconds place the 1000ml beaker under the dispense spout and activate the desired dispense switch and capture the dispensed water into the beaker NOTE Activating the dispense switch during the portion dispense cycle will cancel the portion Record the water volume and repeat at least 2 times to achieve an average dispens
8. box connectors require some disassembly for cleaning and sanitizing NOTE Some bag in box connectors requires some extra steps for cleaning and sanitizing 1 Remove fitting cap a from bag in box quick disconnect fitting if applicable 2 Then if equipped with an internal check valve follow the following steps 3 For QCD Liqui Box fitting remove fitting cap a then remove the internal check valve parts by using the edge of a coin or a screw driver as shown This will allow for the free flow of sanitizing solution 4 For Scholle T fitting first remove the fitting cap a then cut out an outlet spout from a used bag as shown Then screw it onto the Scholle T fitting This will allow for the free flow of sanitizing solution 5 For Scholle L fitting first cut out an outlet spout from a used bag as shown Then screw it onto the Scholle T fitting This will allow for the free flow of sanitizing solution 6 For Scholle Quick Clic fitting by design no steps are needed to allow for the free flow of sanitizing solution OUTLET FROM USED BAG 9 QCD LIQUI BOX SCHOLLE T L 5 QUICK CLIC Figure E 7 Insert the bag in box quick disconnect fitting into a one gallon 3 8L basin of very warm 150 F 65 56 C water without soap 8 Activate the corresponding prime switch until clear soapy water is dispensed from the spout 9 Flush soapy water by repeating steps 3 and 4 using one gallon 3 8L of
9. of a fault condition AX WARNING ELECTRIC SHOCK HAZARD Always disconnect power to the machine before servicing or cleaning Risk of electric shock is present which can cause serious injury or death Page 5 Model LCD 2R and LCD 2A Installation cont Electrical Hook up Ensure water connection is made to machine before proceeding and water source is turned ON NOTE Installation must be performed by a qualified electrician and must conform to all local and national codes NOTE Machine is factory configured for field wiring and power cord is not provided If the machine is intended to configured to 120 volt operation a conversion kit 63578 is available for the addition of a proper 120 volt power cord and a serial tag conversion procedure to match the serial tag to the 120 volt wattage of the heater Refer to Figure A The electrical ratings for your dispenser are located on the serial plate on the outside cabinet For configuration of heater to optional wattages refer to configuration decal 50524 04 located on the inside surface of the electrical access panel see Figure B 1 For cord connected models plug the power cord into an appropriate grounded and dedicated electrical outlet Go to step 8 2 For hard wired models not supplied with an electrical cord the dispenser should be 63578 Kit LCD 120 volt field conversion connected to a dedicated circuit with a fused For converting Power Cord and Serial Tag disconnect
10. when dispense switches are activated How to Dispense a Cup of Coffee WARNING Do not use cups over 6 15 2 cm tall with this machine Use of cups over this height could result in severed burns and injury On models with manual dispense pull handle switches 1 Place a cup under the selected drink dispense nozzle 2 Push and hold dispense switch until cup is full and then release switch On models with portion control pull handle or push button dispense switches 1 Place a cup under the selected drink dispense nozzle 2 Push button for one second then release to dispense one serving Note Portion may be cancelled by reactivating and release of the switch To flush dispense spouts 1 Place a suitable container under the dispense spout to be flushed 2 Press the flush button located behind the door and simultaneously activate the dispense switch for the desired spout to be flushed 7 Model LCD 2R and LCD 2A User Programming Instructions refer to Figure C Setup Mode Open the door and insert Setup key into keyswitch above cooler compartment Turn key 74 turn clock wise the display on front of door will say Setup Mode Press The two Prime buttons and the Flush button now become the programming buttons Prime 1 UP Prime 2 DOWN Flush ENTER Press the Enter button flush The user now has access to the following options Coffee ratio The user can adjust the strength of
11. ACES CHAUDS MACHINE MAY CAUSE DENTRO DE LA MAQUINA PEUVENT PROVOQUER DES BURNS PUEDEN CAUSAR BRULURES MANIPULER AVEC QUEMADURAS SOIN IMPORTANTE CONECTE LA MAQUINA A UNA VIA DE AGUA ANTES DE ENCHUFARLA IMPORTANT CONNECT TO A WATER SUPPLY BEFORE PLUGGING IN IMPORTANT RACCORDER L APPAREIL A LA DISTRIBUTION D EAU AVANT DE METTRE SOUS TENSION 319 Part 61325 Located on the drain hose inside the dispenser TO WATER TO EMPTY HOT WATER FROM Page 4 Model LCD 2R and LCD 2A Installation Water Inlet Connection The National Sanitation Foundation requires the following for an NSF approved water hook up 1 Aquick disconnect water connection or enough coiled tubing so that the machine can be moved for cleaning underneath 2 An approved backflow prevention device such as a double check valve to be installed between the machine and water supply A 3 8 male flare adapter is provided on the back of the machine for hook up to water supply On units plumbed to permanent water line installation of a water filter softener system is recommended to prevent lime and scale build up in the machine On units pumping from remote water container filtered water is recommended to prevent lime and scale buildup in the machine 3 Water pipe connections and fixtures directly connected to potable water supply shall be sized installed and maintained
12. GRINDMASTER CORPORATION Liquid Coffee Dispenser Operation and Instruction Manual for LCD 2A Ambient Cabinet amp LCD 2R Refrigerated Cabinet TABLE OF CONTENTS Introduction User Replaceable Parts Warning Labels Installation How to Dispense a Cup of Coffee User Programming Instructions Engineer Program Settings Cleaning Instructions Troubleshooting Guide Wiring Diagram Prior authorization must be obtained from Grindmaster Corporation for all warranty claims Models LCD 2A and LCD 2R Grindmaster Corporation 4003 Collins Lane Louisville Kentucky 40245 502 425 4776 800 695 4500 GRINDMASTER 800 568 5715 technical service only CORPORATION FAX 502 425 4664 www grindmaster com Grindmaster Corporation 2009 0910 Form AM 328 04 Printed in USA Part 63543 Introduction The Grindmaster Cecilware Liquid Coffee Dispensers LCD 2A and the Liquid Coffee Chilled Dispenser LCD 2R deliver two types of coffee made from liquid concentrate plus hot water The dispenser can be set up for continuous draw by the cup for self serve applications or portion control to fill carafes and decanters for wait staff The standard machine allows for 2 portion sizes per dispense head with the use of a hidden override switch located on the bottom left side of the door If the override switch is pushed the user has 10 seconds to activate a switch to achieve the override portion setting programme
13. If the actual measured ratio does not match the control set point ratio the pump speeds can be offset to cali brate the mix ratio To offset the pump speeds enter the Engineer mode and adjust the Pump speeds accordingly Pump 1 speed offset Left side dispense head Pump 2 speed offset Right side dispense head Increase the offset to increase pump speed Decreases the actual mix ratio ie 30 1 to 25 1 Decrease the offset to decrease pump speed Increases the actual mix ratio ie 25 1 to 30 1 Leak Detect Disabled If the machine records 15 refills without a selection then it assumes there is a leak Disable when machine is installed on cruise ships etc Heat on Selection Disabled Helps with recovery times every time there is a dispense the heaters are turned on in anticipation of the refill water Disable if the machine is wired 230V or 3 phase or a preheater is used otherwise the machine may overheat Coffee detect trip point 125 This is the calibration setting for the Regular coffee optical sensor Decaf detect trip point 125 This is the calibration setting for the Decaf coffee optical sensor No Prod no Sel Enabled No product no selection Usually enabled when out of coffee the machine will lock out the selection 9 Model LCD 2R 1 2 Engineer Program Settings TO BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN ONLY Engineer Mode cont No prod Stop Sel Disabled No prod
14. d for that dispense head Optionally the machine can be fitted with 2 portion touchpads Follow the concentrate manufacturer s storage and shelf life recommendations Product flavor profile is extended with chilled product storage cabinet featured in the LCD 2R The refrigerated model LCD 2R incorporates a Solid State Thermoelectric cooling system which requires little maintenance Cleaning of the thermoelectric may be required on a periodic basis depending on the air quality of the loaction and should be performed only by a qualified technician This dispenser is designed to operate when the ambient temperatures are from 32 F 0 C minimum to 86 F 30 C maximum Do not allow machine to operate or be stored below freezing temperatures or permanent damage will occur to machine unless water has been purged from all water lines Page 2 Model LCD 2R 2 User Replaceable Parts 63597 Key Replacement APEM JD Programming keyswitch 126 50524 04 Decal LCD 63627 Bracket assy 2A amp R Wi iring 50522 05 Grid LCD drip tray 62248 TRAY DRIP 50312 05 Panel LCD power inlet 63546 1 Sholle Quick Clic 71256 assembly Leg 4 Plastic grea 52000 00 Operators manual 63602 Scholle 1910L 63546 3 QCD assembly Bag in Box connector options Page 3 LCD 2R 2 Warning Labels The following warning labels were on your dispenser when it was sh
15. e Blue LCD on door should be illuminated when ON Branch circuit breaker has tripped Reset circuit breaker at service supply panel Power supply external fuse is blown Check and replace fuse if necessary located behind lower right side chassis access panel NO HOT WATER FROM DISPENSE HEAD Faulty water tank heater Check heating element resistance replace if necessary Water Fill circuit watch dog timer has tripped Turn power switch OFF for 5 seconds then ON located at lower right corner of back of machine Water supply to machine is turned OFF Check for flashing diagnostic lights on control board See diagram of control for explanation of lights Level probe sensitivity is too high Water is disabled in programming Check Engineer programming to ensure water is enabled NO CONCENTRATE IS DISPENSED Bag in Box is empty or disconnected Ensure Bag in Box is not empty replace with new Bag in Box if empty Bag in Box connector is pointing up This position can create Position Bag in Box connector pointing down to provide a partial vacuum in the concentrate tube which may prevent positive pressure in the concentrate tube product from being pumped to the dispense spout Concentrate pickup tube is kinked Inspect tubing routing and ensure concentrate tubing is not kinked Concentrate pump tubing product out switch or Bag in Box Periodically clean and sanitize tubing per the cleaning and fi
16. e volume 3 Re enter the Engineer mode programming and re enable the concentrate pumps then disable the water delivery to allow only concentrate to flow from the dispense spouts 4 Using a 50 ml beaker with an opening sufficient to capture the flow of concentrate from the dispense spout push and release the hidden override portion button located on the bottom left side of the door as shown above Within 5 seconds place the 50 ml beaker under the dispense spout and activate the desired dispense switch and capture the dispensed concentrate into the beaker Record the concentrate volume and repeat at least 2 times to achieve an average dispense volume 12 Model LCD 2R and LCD 2A Engineer Program Settings TO BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN ONLY Programming Guide for Calibration of Mix Ratio cont Worksheet Average water volume Average concentrate volume mix ratio Example 600 ml water 20 ml concentrate 30 1 ratio Dispensed Water Average ml Water Flow Rate Average ml Override Portion Time ml second Water Flow Rate ml seconds ml second Dispensed Concentrate ml ml ml Average Mix Ratio Calculation Average Dispensed Water ml Average Dispensed Concentrate ml MIX RATIO ml ml MIX RATIO 13 LCD 2R 2 Weekly Cleaning Instructions refer to Figure E NOTE Some bag in
17. er rear corner of p n 50524 04 machine The machine will make a subtle hissing sound while filling Allow 3 4 minutes for fill time depending on water pressure 6 LCD 2R 2 v x Qs to mz a5 Sx SE ge Power supply inlet minimum 10awg wire Figure B Installation cont 9 After the water tank has completed the fill cycle the display located on the front door of the dispenser should indicate that the heating element has been activated Allow 10 60 minutes for the water tank to reach operating temperature Note Heatup time is dependent on water inlet temperature and input wattage to the machine Bag in Box Hook up 1 Place cups under dispense spouts to catch concentrate and water for priming and dispense operations to follow Place bag in box containers inside the cabinet behind the front door Connect the quick connect fitting to each bag in box 3 After connecting the bag in box Activate the appropriate prime switch behind the door in order to prime the concentrate lines with product Continue to activate the prime switch until concentrate is dispensed from the appropriate dispense spout 4 Repeat steps for other dispense spout 5 Close front door and ensure that both water and product are dispensed simultaneously into cups
18. f the tap is pressed 10 seconds after pressing the hidden Portion override switch that is located underneath the door Set this volume in the same manner described above Once set press Enter Defrost No If Yes is selected then the cooler will defrost any ice build up The product is best moved to a suitable refrigerator during the defrost and the machine door left open to aid with a swift defrost Cleaning the inside of the cooler with a warm cloth aids the process too The machine will automatically start to chill again 15 minutes after defrost has been activated Selections when heating Disabled When disabled the machine will not dispense if the boiler temperature is lower than the chosen lockout temperature Temp Display There are three options Fahrenheit Celsius and Off Once chosen press enter Now the display will be back to the start menu and will say Setup Mode Press Enter You can either press enter to scroll back through the options or you can turn the keyswitch turn counter clockwise to come out of Setup mode 8 Model LCD 2R and LCD 2A Engineer Program Settings TO BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN ONLY Engineer Mode To access engineer mode go into Setup mode when the screen says Setup Mode Press Enter press the Hot Water tap the display will now say Engineer Mode Press Enter The engineer has access to the following options Max Temp 181F Sets the maximum temperat
19. htened or loosened This will help avoid twists and kinks in the tubing Make certain that all plumbing connections are sealed and all electrical connections are tight and isolated This dispenser is heated at all times Keep away from combustibles A WARNING Exercise extreme caution when servicing electrical equipment Disconnect power from the power source when servicing except when electrical tests are specified The illuminated blue LCD on the door indicates that the unit is powered ON Of the blue LCD display is OFF power is still supplied to some of the internal wiring of the machine Follow recommended service procedures Replace all protective shields or safety notices Replace any worn or missing safety notices AN i m3 D p I l ax a Lj gt EE E 3BBBpg P Control Board Diagnostic LEDs The control board incorporates 4 LED indicators for assessing the status of the noteed inputs and outputs 16 Model LCD 2R and LCD 2A Troubleshooting Guide cont A WARNING Risk of electrical shock Disconnect power before removal of any machine access panels Problem Cause Remedy MACHINE DOES NOT POWER UP Machine is unplugged Ensure machine is plugged into power supply Power switch in OFF position Flip power switch to position located at lower right corner of back of machin
20. in accordance with Federal State and Local codes Water hook up 1 Install the 2 front 4 legs to provide approximately 1 2 clearance with the bottom of the machine Install drain tray bracket to the front of the machine by sliding the bracket between the front 4 legs and the bottom of the machine Tighten the front 4 legs to secure the drain tray bracket 3 Install the 2 back 4 legs and tighten 4 Install the plastic drain tray onto the drain tray bracket Note The drain tray is provided with a removable plug to allow for plumbing the drain tray to a drain 5 Install a 3 8 ID flexible water supply hose to the 3 8 male flare fitting on the back of the machine Ensure the water supply hose has sufficient length to allow the machine to be moved for cleaning or service Supplying hot water to the machine will greatly increase the capacity of the machine The use of copper tubing is required to prevent rupture when using a hot water supply A maximum inlet water temperature of 160 F is recommended 6 Ensure that the water supply to the machine is within 20 to 100psi Install a pressure regulator if pressure is too high A WARNING ELECTRIC SHOCK HAZARD Only qualified service personnel should perform installation of this appliance Improper installation could result in serious injury or death A WARNING ELECTRIC SHOCK HAZARD Never use the ground conductor as a neutral conductor Serious injury or death could occur in the event
21. ipped from the factory They should remain on your dispenser in good readable condition at all times If one of your labels is missing or damaged order a replace ment label immediately Part 62981 Located on lower splash panel on front of dispenser Contents can cause J Contenidos pueden causar severe burns if quemaduras severas si el handled improperly uso es inadecuado Contenu peut provoquer des br lures graves si il est manipul incorrectement Part 61321 Located behind the drip pan on the front of the dispenser Z WARNING Risk of electric shock Disconnect from power before servicing Hot parts and surfaces inside and outside machine may cause burns Tank drain hose inside machine dispenses very hot water Will cause burns and or personal injury Must have five gallon heat resistant container to catch hot water Hot water may splash Do not attempt to stop hot water once it begins flowing Replace plug and clamp prior to refilling tank 61321 Part 61319 Located on the outside on the back of the dispenser and on the outside on the electrical access panels WARNING ADVERTENCIA AVERTISSEMENT RISK OF ELECTRIC SHOCK RIESGO DE CHOQUE ELECTRICO DANGER DE CHOC ELECTRIQUE DISCONNECT FROM DESCONECTE LA MAQUINA DE METTRE L APPAREIL HORS POWER BEFORE LA CORRIENTE ANTES DE TENSION AVANT DE SERVICING HOT PARTS ARREGLARA PIEZAS Y L ENTRETENIR DES ELEMENTS AND SURFACES INSIDE SUPERFICIES CALIENTES ET SURF
22. portant If the display does not indicate lack of water within 12 seconds turn the power OFF to avoid burning out the heating element 4 Listen for the inlet valve to energize Ensure the tank drain tube is directed towards a container to catch residual water before air is supplied to purge the line To purge the inlet valve and water inlet tube apply 10 20 psi com pressed air to the inlet valve connection for 10 to 20 seconds while the inlet valve is energized Note Do not energize the inlet valve for more than 5 minutes at a time Otherwise the watchdog timer will disable the inlet valve If this occurs reset the machine by flipping the power switch off then on 5 Reassemble the machine 15 Model LCD 2R and LCD 2A Troubleshooting Guide A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problem encountered If the problem remains after exhausting the troubleshooting steps contact Grindmaster Cecilware Technical Service Department 800 695 4500 8am 6pm M F Only qualified service personnel should perform inspection testing and repair of electrical equipment Intermittent operation of electronic circuit boards is unlikely Board failure will normally be permanent If an intermittent condition is encountered the cause will likely be a switch contact or a loose wire connection at a terminal or crimp The use of two wrenches is recommended whenever plumbing fittings are tig
23. switch or a circuit breaker near the Ratings from 120 240 volt to 120 volt operation dispenser PART ary DESCRIPTION 3 Strain relief knockouts are supplied on the Power Cord 5 15P 14 3 SJO Modified 61530 back of the machine chassis for power entry Decal Lebo eol eld conversion Electrical connections and wiring materials must conform to local codes and or be in Figure A compliance with the National Electric Code Use only copper conductors 4 Remove the access panel located on the lower right side of the dispenser 1 PHASE 120 CONFIGURATION 1 PHASE 120 240 VAC CONFIGURATION Note wiring diagram is on LCD HEATER WIRING 1 6 6kW 240 VAC ELEMENT backside of access panel SD 6 010 240 e TON 6 6kW 28 AMPS 120 240 1 PHASE 3 WIRE GND 5 power supply 1650 WATT 14 AMPS 120 1 PHASE 2 WIRE 5 kW 24 AMPS 120 208 VAC PHASE 3 WIRE GND conductors neutral and ground wire to the appropriate positions on the terminal block located on the lower 120 volt 120 240 volt right side of the dispenser The To control To control ground lug is separate from the gt terminal block Install the side access panel 7 Flip power supply to machine ON at the branch supply disconnect 8 Flip power switch to the ON position and allow the water tank to fill The LCD display on the front door should indicate FILLING NOTE Power switch is located at the right low
24. tting is clogged sanitizing procedure in the instruction manual Coffee is disabled in programming Check Engineer programming to ensure Coffee is enabled WATER TANK OVERFLOWS THROUGH TANK VENT AT BOTTOM OF MACHINE Weeping fill valve seat Call for service WATER TANK OVERFLOWS THROUGH TANK VENT AT BOTTOM OF MACHINE Note A secondary float switch located in the water tank is intended to indicate an overflow condition at the LCD display Weeping water inlet valve Check water inlet valve replace if necessary Note a slow overflow indicated this condition 17 Model LCD 2R and LCD 2A Troubleshooting Guide cont Problem Cause Remedy LCD DISPLAY INDICATES OVERFLOW NOTE Water must be drained from the tank below the float switch after the fault condition is diagnosed Water level probe sensitivity is set too low Increase sensitivity of water fill circuit see programming notes Water Level Trip Faulty or corroded level probe Remove level probe and grommet Remove any scale or miner al buildup and reassemble Faulty level control circuit wiring Ensure both probe and probe ground connections are securely fastened to water tank top Check wiring for defects Inlet water pressure too high Ensure water pressure is below 100 psi Weeping water inlet valve Check water inlet valve replace if necessary Note a slow overflow indicates this condition WATER TANK BOILS
25. uct stop Selection If enabled when the coffee goes low during a dispense it will stop giving a low measure If disabled it will continue with the dispense even if the coffee goes low then lock out once the dispense is finished Calibrate Temp This is the calibration setting for the boiler thermistor Calibrate Disp Temp This is the calibration setting for the dispense thermistor Display Heating Enabled If enabled the machine will display Heating if the dispense thermistor is reading below the lockout temperature If disabled the temperature display goes blank when locked out unless it is heating from initial turn on Water level Trip 50 This adjusts the sensitivity of the water level sensor The figure may need to be adjusted higher if the machine is being supplied by water with very little impurities bottled water in exhibitions for example View level Reading Disabled This is enabled when setting the water level trip point always disable once trip point is set Temp display source Disp Used when calibrating the boiler thermistors options are GM thermistor boiler dis pense thermistor or both together Always select Dispense thermistor once calibrated Once you have scrolled through all these options the machine will revert back to Setup mode Machine Fault Codes 1 Overflow The Inlet valves may be blocked open The overflow float may have failed connections from the overflow float to the PCB may ha
26. ure of the boiler Set Lockout Temp 161F Sets the selection lockout temperature Power Setting 230v AC The input mains voltage has an effect on the heating overrun once the tank has reached it top temperature this feature helps combat this There are two options 110v AC and 230v AC If machine is triple or dual phase then select 230V AC Selection Input Tomlinson Tap There are two choices Tomlinson tap or the touchpads Coffee Enabled Disabling coffee will turn off the concentrate pumps during a dispense Used only when setting water outlet valve flow rates Water Enabled Disabling water will turn off outlet valves during a dispense Used only when setting concentrate pump flow rates or calibrating optical concentrate sensors Product sensors Enabled If disabled the machine will override the product sensors and will always assume product is present Only disable sensors if the sensors are faulty and the machine is waiting for a replacement part Product source Choose between Bag in Box or Can this determines which product sensors are used Pump 1 speed offset This is the calibration setting for the Regular coffee pump There are 2 settings one for continuous flow lt 50 1 and the other for pulsed dispenses gt 50 Pump 2 speed offset This is the calibration setting for the Decaf coffee pump There are 2 settings one for con tinuous flow lt 50 1 and the other for pulses dispenses gt 50 1 Note
27. ve failed 2 Water sensor fail The water sensor thinks the boiler is empty but the overflow float is up Connections from the sensor to the PCB may have failed The sensor loom may be disconnected from the Control PCB 3 Thermostat overheat The limit thermostat has tripped This currently isn t being monitored by the control logic 4 Lack of Water Insufficient water during normal operation If the inlet valves have been on for over a minute since the last call for water then it assumes insufficient water There may not be sufficient water pressure to flow past the valves The water supply may have been turned off There may be a blockage in the inlet pipe either before or after the inlet valves Connections from the inlet valves to the PCB may have failed The inlet valve loom may be disconnected from the Control PCB Inlet valve may be blocked or failed closed 5 Lack of water 1 Insufficient water from initial fill If inlet valves have been on for 8 minutes from the time the machine is turned on then it assumes insufficient water to fill the tank Possible causes have been outlined above 10 Model LCD 2R and LCD 2A Engineer Program Settings TO BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN ONLY Machine Fault Codes cont 6 Water overheat The thermistor has detected the water is too hot The boiler element contactor may have failed short circuit The machine may be running high Wattage Power with a preheater
28. very warm 150 F 65 56 C water without soap 10 Prepare one gallon 3 8L of food grade sanitizing solution in a container per manufacturer s recommendations and repeat step 4 until sanitizing solution is dispensed from the spout Let sanitizing solution work for 5 minutes then flush the concentrate line by activating the prime switch until the sanitizing solution dispenses clear NOTE Recommended sanitizing solution is KAY 5 Sanitizer Cleaner mix one ounce 28g packet of sanitizer powder 2 5 gallons 9 5L of warm approximately 120 F 48 89 C water to achieve a solution of 100ppm of available chlorine 11 Remove the bag in box connector from the sanitizing solution basin and purge the concentrate line by pushing and holding the dispense switch until the concentrate tube runs dry 12 Flush the concentrate line with fresh water by submerging the bag in box connector in a one gallon 3 8L container of fresh tap water and activating the corresponding dispense switch for one minute 13 Re assemble the bag in box connector then reconnect the bag in box connector to a bag in box of concentrate 14 Prime the concentrate line by activating the prime switch until concentrate drips from the spout 15 Activate dispense and discard 2 6 ounce 168g drinks from dispense nozzle 16 Repeat all steps for other dispense heads Page 14 Model LCD 2R and LCD 2A Service and Cleaning Draining the Tank Always empty the tank before shipping
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