Grindmaster LIQUID COFFEE DISPENSER LCD 2R User Manual

GRINDMASTER CORPORATION  
Liquid Coffee Dispenser  
Operation and Instruction Manual  
for  
LCD-2A (Ambient Cabinet)  
& LCD-2R (Refrigerated Cabinet)  
TABLE OF CONTENTS  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . .2  
User Replaceable Parts . . . . . . . . . . . . . . .3  
Warning Labels . . . . . . . . . . . . . . . . . . . . . .4  
Installation . . . . . . . . . . . . . . . . . . . . . . . . .5  
How to Dispense a Cup of Coffee . . . . . . . . . .7  
User Programming Instructions . . . . . . . . .8  
Engineer Program Settings . . . . . . . . . . . .9  
Cleaning Instructions . . . . . . . . . . . . . . . . 14  
Troubleshooting Guide . . . . . . . . . . . . . . .16  
Wiring Diagram . . . . . . . . . . . . . . . . . . . . .19  
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  
(800) 568-5715 (technical service only)  
FAX (502) 425-4664  
© Grindmaster Corporation, 2009  
Printed in USA  
0910 Form # AM-328-04  
Part # 63543  
User Replaceable Parts  
ꢒꢓꢝ3ꢕꢅ  
,ꢙꢋꢄꢅꢍꢙꢈ&ꢊꢗꢙ#ꢙ$ꢉꢅꢎꢑ-.ꢅ/ꢇꢅ  
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ꢝꢞꢝꢔꢛ ꢞꢛꢅ  
ꢇꢙꢗꢊ&ꢄꢅꢆ   
ꢔꢎ'ꢍꢅ(ꢂꢁꢂ$)  
ꢒꢓꢒꢔꢕꢅꢖꢁꢊꢗꢘꢙꢉꢅꢊꢚꢚꢋ  
ꢝꢞꢝꢔꢔ ꢞꢝꢅ  
ꢀꢁꢂꢃꢄꢅꢆ ꢇꢅꢃꢁꢂꢈꢅꢉꢁꢊꢋ  
ꢒꢔꢔꢛꢜꢅ  
ꢌꢍꢎꢏꢄꢅꢇꢍꢐꢑ  
ꢝꢞꢓ*ꢔ ꢞꢝꢅ  
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Page 3  
Model LCD-2R and LCD-2A  
Warning Labels  
The following warning labels were on your dispenser when it was shipped 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  
Part #61321, Located behind the drip pan on the front of the dispenser  
Part #61319, Located on the outside on the back of the dispenser  
and on the outside on the electrical access panels  
Part #61325, Located on the drain hose inside the dispenser  
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. A quick 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 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.  
2. 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.  
WARNING: ELECTRIC SHOCK HAZARD  
Only qualified service personnel should perform installation of this appliance.  
Improper installation could result in serious injury or death.  
WARNING: ELECTRIC SHOCK HAZARD  
Never use the ground conductor as a neutral conductor. Serious injury or  
death could occur in the event of a fault condition.  
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  
connected to a dedicated circuit with a fused  
disconnect switch or a circuit breaker near the  
dispenser.  
ꢀꢁꢂꢃꢄꢅꢆ ꢅꢅꢈꢉꢊꢋꢌꢍꢎꢏꢐ ꢑꢆꢒꢐꢓꢅꢅꢔꢏꢕꢎꢒꢖꢗꢆꢏꢕ  
ꢘꢙꢏꢖꢔꢏꢕꢎꢒꢖ ꢆꢕꢚꢛꢏꢜꢒꢖꢉꢏꢖꢓꢝꢕꢓ ꢒꢖꢆꢝꢐ!ꢝꢚ  
"ꢝ ꢆꢕꢚꢗꢑꢖꢏ#ꢋꢌꢍ$ꢌ%ꢍꢎꢏꢐ  ꢋꢌꢍꢎꢏꢐ ꢏ&ꢒꢖꢝ ꢆꢏꢕ'  
ꢇꢈꢉꢁꢄ  
ꢀꢁꢂꢃꢄ ꢅꢆ  
ꢌꢁꢍꢆ ꢎꢂꢏꢐꢉꢀꢇꢁꢀꢅ  
ꢊꢃꢋꢂꢉ  
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3. Strain relief knockouts are supplied on the  
back of the machine chassis for power entry.  
• Electrical connections and wiring  
Figure A  
materials must conform to local codes and/or be in  
compliance with the National Electric Code.  
• Use only copper conductors  
4. Remove the access panel located on  
ꢀꢁꢂꢁꢃꢄꢅꢆ ꢃꢇꢁꢄꢈꢂꢉꢊꢁ ꢃꢅꢋꢁꢉꢄꢂꢉꢌꢍ  
the lower right side of the dispenser.  
Note: wiring diagram is on  
ꢎꢃꢂꢌꢈꢏꢆꢃꢎꢒꢓꢃꢄꢈꢔꢃꢔꢁꢊꢇꢅꢐꢕꢉꢈꢀꢅꢁꢊ  
ꢎꢃꢂꢌꢈꢏꢆꢃꢎꢒꢓ"ꢒꢝꢓꢃꢄꢈꢔꢃꢔꢁꢊꢇꢅꢐꢕꢉꢈꢀꢅꢁꢊ  
ꢗꢎꢘꢃꢙꢚꢙꢛ ꢃꢃꢒꢝꢓꢃꢄꢈꢔꢃꢆꢑꢆꢞꢆꢊꢀ  
ꢑꢔꢖꢃꢌꢆꢈꢀꢆꢉꢃ ꢅꢉꢅꢊꢐ  
ꢏꢅꢊꢐꢑꢆꢃꢂꢌꢈꢏꢆ  
ꢗꢎꢘꢃꢙꢚꢙꢛ ꢃꢜꢃꢒꢝꢓꢃꢄꢈꢔꢃꢆꢑꢆꢞꢆꢊꢀꢃꢁꢂꢆꢉꢈꢀꢆꢖꢃꢈꢀꢃꢎꢒꢓꢃꢄꢈꢔ  
ꢏꢅꢊꢐꢑꢆꢃꢂꢌꢈꢏꢆ  
ꢎꢙ ꢓꢃ ꢈꢀꢀꢃꢗꢎꢝꢃꢈꢞꢂꢏꢘꢃꢜꢃꢎꢒꢓꢃꢄꢈꢔꢃꢎꢃꢂꢌꢈꢏꢆꢃꢗꢒꢃ ꢅꢉꢆꢃ!ꢃꢐꢊꢖꢘ  
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backside of access panel.  
 ꢃꢛ ꢃꢗꢒꢝꢃꢈꢞꢂꢏꢘꢃꢜꢃꢎꢒꢓ"ꢒꢓ#ꢃꢄꢈꢔꢃꢂꢌꢈꢏꢆꢃꢗ$ꢃ ꢅꢉꢆꢃ!ꢃꢐꢊꢖꢘ  
5. Connect the power supply  
conductors, neutral and ground wire  
to the appropriate positions on the  
terminal block located on the lower  
right side of the dispenser. The  
ground lug is separate from the  
terminal block.  
ꢅꢜꢆꢝꢜ ꢆ!ꢖꢍꢒ  
ꢅꢜꢆ!ꢖꢍꢒ  
ꢕꢖꢎꢖꢃꢒꢉꢖꢍꢅꢅ  
ꢗꢄꢘꢘꢍꢙ  
ꢕꢖꢎꢖꢃꢒꢉꢖꢍꢅꢅ  
ꢗꢄꢘꢘꢍꢙ  
ꢀꢁꢂꢃꢄꢅꢆ ꢃꢁꢇꢃ ꢈꢀꢆꢉꢃꢀꢈꢊꢋ  
ꢀꢁꢂꢃꢄꢅꢆ ꢃꢁꢇꢃ ꢈꢀꢆꢉꢃꢀꢈꢊꢋ  
ꢃꢍꢎ  
ꢌꢆꢈꢀꢆꢉ  
ꢃꢍꢎ  
ꢌꢆꢈꢀꢆꢉ  
6. 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 lower rear corner of  
ꢓꢉꢊꢊꢃ  
ꢓꢉꢊꢊꢃ  
ꢐꢑꢂꢒꢊ  
ꢌꢍ ꢎꢏ  
ꢚꢊꢛ  
ꢐꢑꢂꢒꢊ  
ꢌꢍ ꢎꢏ  
ꢌꢍ ꢎꢏ  
ꢌꢍ ꢎꢏ  
ꢌꢍ ꢎꢏ  
ꢌꢍ ꢎꢏ  
%"&'ꢃ ꢓ ꢒꢝ(ꢓꢝ  
machine. The machine will make a  
subtle hissing sound while filling.  
Allow 3-4 minutes for fill time  
Figure B  
depending on water pressure.  
Page 6  
Model LCD-2R and LCD-2A  
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.  
2. 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 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.  
Page 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 ¼ turn clock-  
wise, the display on front of door will say ‘Setup  
Mode, Press Enter’.  
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  
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 if 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 ¼ turn counter clockwise to come out of Setup mode.  
Page 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 temperature 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 (<=50:1) and the other for pulsed dispenses (>50:!).  
Pump 2 speed offset= : This is the calibration setting for the Decaf coffee pump. There are 2 settings, one for con-  
tinuous flow (<=50:1) and the other for pulses dispenses (>50:1).  
Note: 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.  
Page 9  
Model LCD-2R and LCD-2A  
“Engineer” Program Settings  
TO BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN ONLY  
Engineer Mode (cont.)  
No prod, Stop Sel [Disabled]: No product, 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 have 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.  
Page 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.  
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 valve=  
Middle dispense head= 4.5 turns out CCW  
Bottom valve =  
Right dispense head= 4.0 turns out CCW  
4. Reassemble machine and power ON.  
Page 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.)  
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.  
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.  
1. Disable the concentrate pumps by entering the “Engineer”  
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 dispense 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.  
Page 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  
1. _____________ ml  
2. _____________ ml  
3. _____________ ml  
Average: _____________ ml  
Water Flow Rate = Average ml / Override Portion Time = ml/second  
Water Flow Rate = _____________ ml / _____________ seconds = _____________ ml/second  
Dispensed Concentrate  
1. _____________ ml  
2. _____________ ml  
3. _____________ ml  
Average: _____________ ml  
Mix Ratio Calculation  
Average Dispensed Water (ml) / Average Dispensed Concentrate (ml) = MIX RATIO  
_____________________ (ml) / ___________________ (ml) = _____________ MIX RATIO  
Page 13  
Model LCD-2R and LCD-2A  
Weekly Cleaning Instructions  
refer to Figure E  
NOTE: Some bag-in-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.  
(a)  
OUTLET FROM  
USED BAG  
COIN  
QCD (LIQUI-BOX)  
SCHOLLE (T)  
SCHOLLE (L)  
SCHOLLE (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 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.  
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  
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.  
Important: 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.  
Page 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 tightened 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.  
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.  
Control Board Diagnostic LEDs  
The control board incorporates (4) LED indicators for  
assessing the status of the noteed inputs and outputs.  
Page 16  
Model LCD-2R and LCD-2A  
Troubleshooting Guide (cont.)  
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 “ON” position (located at lower right corner  
of back of machine); Blue LCD on door should be illuminated  
when ON.  
Branch circuit breaker has tripped  
Power supply external fuse is blown  
Reset circuit breaker at service supply panel  
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  
Water supply to machine is turned OFF  
Turn power switch “OFF” for 5 seconds, then “ON” (located at  
lower right corner of back of machine)  
Check for flashing diagnostic lights on control board  
Level probe sensitivity is too high  
See diagram of control for explanation of lights.  
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 a Position Bag-in-Box connector pointing down to provide a  
partial vacuum in the concentrate tube which may prevent  
product from being pumped to the dispense spout.)  
positive pressure in the concentrate tube.  
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  
fitting is clogged.  
Periodically clean and sanitize tubing per the cleaning and  
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.)  
Page 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  
Faulty level control circuit wiring  
Remove level probe and grommet. Remove any scale or miner-  
al buildup and reassemble.  
Ensure both probe and probe ground connections are securely  
fastened to water tank top. Check wiring for defects.  
Inlet water pressure too high  
Weeping water inlet valve  
Ensure water pressure is below 100 psi  
Check water inlet valve; replace if necessary (Note: a slow  
overflow indicates this condition)  
WATER TANK BOILS  
Temperature setting too high for elevation of installation  
Adjust temperature down, refer to temperature adjustment in  
Operators Manual.  
Heater contactor stuck in closed position  
Defective thermistor  
Check contactor for welded contacts; replace if necessary  
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  
Incorrect tubing installed  
Call for service.  
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  
Heavy usage  
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 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  
Page 18  
Model LCD-2R and LCD-2A  
Wiring Diagram  
: + 7  
* 5 <  
% / 8  
3 1 .  
3 1 .  
5 ( '  
% 5 1  
5 ( '  
% 5 1  
% / .  
2 9 ,  
2 9 ,  
5 * 2  
5 ( '  
% / .  
5 ( '  
5 ( '  
: + 7  
* 5 1  
D Q 7  
3 L Q N  
* U H \  
9 L R O H W  
< H O O R Z  
U D 2 Q J H  
% / .  
5 ( '  
: + 7  
* 5 1  
% / .  
% O X H  
% U R Z Q  
* U H H Q  
5 H G  
5 ( '  
5 ( '  
* 5 <  
* 5 <  
K L W : H  
% O D F N  
5 ( '  
* 5 <  
5 ( '  
% / .  
% / .  
5 ( '  
& . / $ %  
& . / $ %  
(
: + , 7  
(
: + , 7  
5 ( '  
5 ( '  
* 5 ( ( 1  
* 5 ( ( 1  
1 $ * 5 ( 2  
/ / 2 < : (  
7 ( , 2 9 /  
1
2 : % 5  
1
2 : % 5  
8 / ( %  
8 / ( %  
* 5 ( <  
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: + 7  
* 5 1  
3 1 .  
1 , . 3  
7 $  
1
1 $ * 5 ( 2  
/ / 2 < : (  
2 9 ,  
7 ( , 2 9 /  
* 5 ( <  
1 , . 3  
7 $  
1
Page 19  
Model LCD-2R and LCD-2A  
Grindmaster® Coffee Grinders and Brewers • PrecisionBrew™ Brewing Systems • Espressimo® Espresso Machines  
Crathco® Hot Beverage Dispensers • Crathco® Cold and Frozen Beverage Dispensers • AMW Coffee and Tea Systems  
Tel (502) 425-4776 • Fax (502) 425-4664 • 1-800-695-4500 (USA & Canada only)  
P.O. Box 35020 • Louisville, KY 40232 • USA  
© Grindmaster Corporation, 2009  
PRINTED IN USA  
0910 Form # AM-328-04  
Part # 63543  

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