GRINDMASTER CORPORATION 11 Brew Coffee Systems

 Information

Specifications

• Models : -11, -21, -10, -20 including H, HQ versions
• Manufacturer : Grindmaster Corporation
• Address : 4003 Collins Lane Louisville, KY 40245 USA
• Contact Numbers : 502-425-4776, 800-695-4500, 800-568-5715 (Technical Service Only)
• Fax : 502-425-4664
• Website : www.grindmaster.com
• Patents Pending 1008
• Form #: BW-350-14
• Part #: 70661

Warning Labels

• USE ONLY ON A CIRCUIT THAT IS PROPERLY PROTECTED AND CAPABLE OF THE RATED LOAD.
• ELECTRONICALLY GROUND THE CHASSIS.
• DO NOT DEFORM PLUG OR CORD.
• FOLLOW NATIONAL AND LOCAL ELECTRICAL CODES.
• WATER CONNECTIONS SHALL COMPLY WITH THE PLUMBING CODE OF BOCA & THE FOOD SERVICE SANITATION MANUAL OF THE FDA.
• DO NOT USE NEAR COMBUSTIBLES.
• FAILURE TO COMPLY RISKS PERSONAL INJURY, DAMAGE TO EQUIPMENT, FIRE OR SHOCK HAZARD.
• READ THE ENTIRE OPERATING MANUAL INCLUDING THE LIMIT OF WARRANTY AND LIABILITY BEFORE BUYING OR USING THIS PRODUCT.
• ALWAYS UNPLUG UNIT FROM POWER SUPPLY BEFORE SERVICING.

Technical Data – Single Bean Domestic Models

Technical Data – Dual Bean Domestic Models

Unit Installation

IMPORTANT: This brewer should be installed by a knowledgeable and experienced commercial equipment installer.

Brewer Contents
Your brewer package should include the following

• 1 Grinderbrewer (either single or dual bean)
• 1 Operation and Instruction Manual (this manual)
• 1 Hose to 1/4 flare fitting (part # 61237)

Tools Required for Installation

• 2 Phillips screwdriver

• 9/16 wrench
• 5/8 wrench (or crescent wrench)
• 6 level
• NOTE : Other tools may be needed depending on the type of water supply tubing and location.

Installation Steps

1. Inspect unit to see if any damage occurred in shipment.
2. Position brewer on counter. Place on sturdy permanent countertop. If you have an airpot brewer, install the 4 plastic legs (included) at the bottom of the brewer. Lean the brewer towards its side to expose screw holes underneath for legs. Adjust the leg height to suit the size of airpots you will use. IMPORTANT : Adjust the feet to level the brewer. With a bubble level, check to see that the brewer is level on the countertop.
3. Water Hook-up (All Models)

Water Hook-up Steps

IMPORTANT: This equipment must be installed in compliance with applicable Federal, State, and/or Local plumbing codes having jurisdiction. Incoming water pressure should be greater than 20 psi and not more than 100 psi.

1. The incoming water supply should have a shut-off valve connected in-line. The end should have a female 1/4 flare fitting. Water supply should be a 1/4 I.D. dedicated line branched off a 1″ or larger supply line.
2. Prior to installing the brewer, flush out the water line by running approximately 1 gallon of water into a pail. This will ensure no sediment from a new installation can get into the brewer.

FAQ

• Q: What should I do if I notice damage to the unit upon delivery?
  A: If you notice any damage to the unit upon delivery, please contact our customer service immediately for assistance.

• Q: What should be the incoming water pressure for the brewer?
  A: The incoming water pressure should be greater than 20 psi and not more than 100 psi.

• Q: Can I use this product near combustibles?
  A: No, it is not recommended to use this product near combustibles to avoid any potential fire hazards.

• Q: What tools are required for installation?
  A: The tools required for installation include a #2 Phillips screwdriver, a 9/16 wrench, a 5/8 wrench (or crescent wrench), and a 6 level. Additional tools may be needed depending on the type of water supply tubing and location.

Prior authorization must be obtained from Grindmaster Corporation for all warranty claims.

• Grindmaster Corporation
• 4003 Collins Lane
• Louisville, KY 40245 USA
• 502-425-4776 800-695-4500
• 800-568-5715 (Technical Service Only)
• FAX 502-425-4664
• www.grindmaster.com

© Grindmaster Corporation, 1997 PRINTED IN USA
Patents Pending 1008 Form # BW-350-14 Part #70661

Warning Labels

The following warning labels were on your grinder brewer when it shipped from the factory. They should remain on your grinder brewer in good, readable condition at all times. If one of your labels is missing or damaged, order a replacement label immediately.

Part # 71104
Located on outside back, grinder brewer casing

• WARNING
  USE ONLY ON A CIRCUIT THAT IS PROPERLY PROTECTED AND CAPABLE OF THE RATED LOAD.

• WARNING
  ELECTRONICALLY GROUND THE CHASSIS.

• WARNING
  DO NOT DEFORM PLUG OR CORD.

• WARNING
  NATIONAL AND LOCAL ELECTRICAL CODES.

• WARNING
  WATER CONNECTIONS SHALL COMPLY WITH THE PLUMBING CODE OF BOCA & THE FOOD SERVICE SANITATION MANUAL OF THE FDA

• WARNING
  DO NOT USE NEAR COMBUSTIBLES.

• WARNING
  FAILURE TO COMPLY RISKS PERSONAL INJURY, DAMAGE TO EQUIPMENT, FIRE OR SHOCK HAZARD.

• WARNING
  READ THE ENTIRE OPERATING MANUAL INCLUDING THE LIMIT OF WARRANTY AND LIABILITY BEFORE BUYING OR USING THIS PRODUCT.

• WARNING
  ALWAYS UNPLUG UNIT FROM POWER SUPPLY BEFORE SERVICING.

Technical Data – Single Bean Domestic Models

Technical Data – Dual Bean Domestic Models

BASED ON 4 in LEG HEIGHT
INCLUDING WATER INLET FITTING

Unit Installation

IMPORTANT : This brewer should be installed by a knowledgeable and experienced commercial equipment installer.

Brewer Contents
Your brewer package should include the following

• 1 Grinder brewer (either single or dual bean)
• 1 Operation and Instruction Manual (this manual)
• 1 Hose to 1/4″ flare fitting (part # 61237)

Tools Required for Installation

• 2 Phillips screwdriver

• 9/16″ wrench
• 5/8″ wrench
• (or crescent wrench)
• 6″ level

NOTE : Other tools may be needed depending on the type of water supply tubing and location.

1. Inspect unit to see if any damage occurred in shipment.

2. Position brewer on counter. Place on sturdy permanent counter top. If you have an airpot brewer, install the  4″ plastic legs (included) at the bottom of the brewer. Lean the brewer towards its side to expose screwholes underneath for legs. Adjust the leg height to suit the size of airpots you will use. IMPORTANT: Adjust the feet to level the brewer. With bubble level, check to see that the brewer is level on countertop.

Water Hook-up (All Models) (Refer to Figure A)

IMPORTANT : This equipment must be installed in compliance with applicable Federal, State and/or Local plumbing codes having jurisdiction. Incoming water pressure should be greater than 20 psi and not more than 100 psi.

1. The incoming water supply should have a shut-off valve connected in-line. The end should have a female 1/4″ flare fitting. Water supply should be a 1/4″ I.D. dedicated line branched off a 1″ or larger supply line.
2. Prior to installing the brewer, flush out the water line by running approximately 1 gal. of water into a pail. This will insure no sediment from a new installation can get in the brewer.
3. Make sure your source water is turned off. Connect the water line’s 1/4″ female flare fitting (1) to the 1/4″ male fit- ting on the hose connector (2).
4. Make sure Grind’n Brew is unplugged. Connect the water line to the brewer with the hose connector (2).
5. Turn the water valve on, sending water to the brewer. If there are any leaks, tighten connections to stop leakage.

Electrical Hook-up and Start-up Procedure (All Models)

• IMPORTANT : Do not plug the unit in yet.
• IMPORTANT : This equipment must be installed in compliance with applicable Federal, State and/or Local electrical codes having jurisdiction. Do not use extension cords. Make sure that the outlet the brewer plugs into is grounded.
• IMPORTANT : Make sure that the Main Power Switch in the back of the unit is in the Off position before plugging in the brewer.
• IMPORTANT : Domestic Q models at 208/230V must have a 4 wire electrical connection. The circuit must have 2 hots, 1 ground and 1 neutral wire. Failure to install with a 4 wire connection will void the manufacturer’s warranty. 208/230 Volt Grind’n Brew units require a 20 Amp circuit.

1. Plug the brewer into an electrical outlet (or run power to unit for hardwire applications).
2. Make sure the brew basket is inserted in the brew rails.
3. Reach to the back of the brewer and press the white Main Power Switch to the On position. The front control lights will go on, and water will enter the brewer. The tank will fill in 2-3 minutes from the moment the Main Power Switch is turned on.
4. Once the tank is full, it will take 10-15 minutes to heat the water to the brewing temperature. (Cut that time in half for the 230V “Q” models.) Once the Ready light is lit, you are ready to brew.

Operating the Touchpad (Refer to Figure B)

1. To select the appropriate bean hopper, press the hopper (left) button until the desired indicator arrow is illuminated. NOTE: This step only applies to dual bean hoppers.
2. To select a portion size, press the center of the Portion Size (middle) button until the half pot or full pot symbol (depending on your need) is illuminated.
3. The Mode (right) button allows you to select either the “Brew Only”, “Grind Only” or “Grind and Brew” feature.
   • To grind only, press the center of the Mode (right) button until the grinder symbol is illuminated.
   • To brew only, press the center of the Mode (right) button until the coffee cup symbol is illuminated.
   • To grind and brew, press the Mode (right) button until both symbols are illuminated together.

IMPORTANT : Brewers are factory set for throw weight and water portion. Please check that installation is correct before making adjustment. No adjustments should be necessary for normal installation.

Brewing

IMPORTANT : Brewers are factory set for the correct grind and brew times for average situations. You should not need to make adjustments in the field.

1. Make sure that a new paper filter is in the brew basket and the brew basket is in place in the brewer.
2. Place beans in the hopper.
3. Choose to “Grind and Brew”. Press the far right touchpad so “Grind and Brew” lights are lit.
4. Choose the Portion Size. Press the middle touchpad until desired volume is lit.
5. Choose Decaf or Regular coffee (only applicable to dual bean Grind’n Brews). Press left touchpad. Arrow will either point left or right for Decaf or Regular.
6. Place a decanter or airpot under the brew basket, depending on the model.
7. Press Start. You will see the coffee bean level go down slightly. You will hear the coffee grind. Coffee is automatically ground, portioned and placed in brew basket. Then ground coffee is automatically brewed. The Ready light will now blink, indicating that grinding and brewing are in progress. This will take 3-4 minutes for a 1/2 gal. pot. Portions are factory set. A stop function is added to the start switch. When this switch is depressed, it allows the unit to stop during the selected grind, brew or grind and brew functions.
   After brewing a pot, the tank must reheat. Reheat time is 5 1/2 – 8 minutes for 120V brewers and half that time for 230V machines. Remember that the brewer will not function (although the grinder will) until the Ready light is on, indicating that the water is hot enough to brew. A flashing green light indicates that the brewer is reheating or that there is a cycle in progress. Do not remove the brew basket while the light is flashing. The brew basket must be removed before a new brew can be initiated. This feature ensures that the operator discards the old coffee grounds and installs a new coffee filter.

User Lockout
User Lockout is achieved via the position of the LOCK jumper on the board header. Locate the header on the board (shown below) and place the jumper in the desired position. In the Locked position all menus in this document are locked out, and the unit will only allow brewing or grinding functions. There are two versions of the header, 10 pin and 2 nin Doth confinuratione ara chown holour!

Bean Counter

• The built-in bean counter measures relative usage of its Grind’n Brew® machine by totaling the amount of seconds the augers have fed beans into the grinder. This number directly correlates to the amount of beans used by the machine.
• Depending on model, the bean counter is either always shown or hidden to the user.
• The Bean Counter Menu is accessed by holding the UP and DOWN keys for 5 seconds. If the counter is normally hidden, it will be shown here. The user can reset the counter through this menu. Pressing the SET button will display “REs” and the user can select “YEs” or “no” with the UP and DOWN keys. Pressing the SET key finalizes the selection. This menu times out after 10 seconds and is disabled by the User Lockout Jumper.

User Settings
The Grind’n Brew® has several factory-set options that can be modified by the user. These are divided into two categories: Universal Settings or Brew Settings. Universal Settings pertain to the whole unit, and Brew Settings pertain to one of the four available brew cycles – (Regular Full, Regular Half, Decaf Full and Decaf Half). All settings are retained during a power loss. The original factory settings can be restored by using the System Restore Function.

User Settinas

Pulse Brew Cycle

• Pulse Brewing is a feature that increases the control and performance of the Grind’n Brew® machine. By pulsing water during the brew cycle, you allow greater contact time and better extraction of the coffee. Ultimately you will achieve a bolder and more consistent cup of coffee by using this feature.
• If pulse brewing is selected, the unit will brew the number of pulses identified by the Pulse Brew Pulses setting. Each pulse is identical. It will begin by dumping water for the Pulse Brew Pour Time and then wait for the Pulse Brew Delay Time. This will repeat until all pulses are finished.
• Once the pulses are complete, the unit will pour water for the remaining Brew Time. Brew Time is the total amount of time water is poured over the coffee grinds. Pulse Brew Pour Times are included in this total. Pulse Brew Delay Times are not included. The cycle will always stop pouring once the Brew Time is met, regardless of whether this happens in the middle of pulse brewing.
• Drip Time is half of the Brew Time. However, the Drip Time will never be greater than 1:30.

User Menu

The User Menu is accessed by pressing the SET key on the display board. Navigation is accomplished by pressing the UP, DOWN and SET keys. Feedback to the user is shown by the 3-digit numerical display. The User Menu exits after a 1 minute timeout or all modes are stepped through. This menu is disabled by the User Lockout Jumper.

Brew Settings – Brew Cycle Selection
There are four independent settings for brew cycles: Regular Full Brew, Regular Half Brew, Decaf Full Brew and Decaf Half Brew. The User Menu adjusts settings for the brew cycle selected by the keypad. For instance, if you want to change settings for Decaf Half brew then set the keypad to the Decaf Hopper and Half Brew Size before entering the User Menu. The keypad settings cannot be changed while the User Menu is displayed.
User Menu Navigation
Advancing through the menu is done by pressing the SET Key. Each parameter is adjusted by pressing the UP and DOWN keys. Pressing and holding the UP and DOWN keys will quickly scroll through settings. The table below shows how to step through this menu.

“77” to “96” °C
3| Show Auger Time
the amount of coffee beans fed into the grinder| “At”| None
4| Set Auger Time
the amount of coffee beans fed into the grinder| Displays the current selection depending on Brew Cycle| “0.1” to “45.0” seconds
5| Show Brew Time
Total amount of pour time for the brew cycle| “br”| None
6| Set Brew Time
Total amount of pour time for the brew cycle| Displays the current selection depending on Brew Cycle| “0.01” to “6.00” in min- utes.seconds
7| Show Pulse Brew| “P-b”| None
8| Pulse Brew Pulse Number sets the number of pulses in the brew cycle| Displays the current selection depending on Brew Cycle| “OFF” to “10”
9| Pulse Brew Pour Time sets the amount of pour time in each pulse| Displays the current selection depending on Brew Cycle| “0.05” to “1.00” in
minutes. seconds
10| Pulse Brew Delay Time sets the amount of delay time between each pulse| Displays the current selection depending on Brew Cycle| “0.05” to “1.00” in min- utes. seconds
11| Show Low Temp No Brew| “Ltn”| None
12| Set Low Temp No Brew enable or disable| Displays the current selection. Factory default is “ YES ”| “OFF” or “ON”

Brew Volume Setting Menu

• This feature sets the brew time based on water volume of a desired container. Before using this feature, remove the brew basket, remove the spray head and place the desired container in place underneath the brewer.
• The Brew Volume Setting Menu is started by selecting a brew cycle and holding in the START switch for 5 seconds. The display will show “Pro” at this time. Again press the START switch, and water will begin dispensing into the container. The display shows a Brew Time count at this time. When satisfied with the water level, again press the START switch. At this point the Brew Time flashes on the display for 20 seconds. Press the START switch again within the 20 seconds to accept the new Brew Time. No changes will be made if the Brew Time is not confirmed in this last step.
• There are four independent brew times in the unit. The set Brew Time is the cycle shown on the keypad. The keypad cannot be modified while setting the brew volume. This feature is disabled by the User Lockout Jumper.

System Restore Feature

• This function will restore a Grind’n Brew® unit to its original factory settings. To activate system restore, power on the unit while holding in the DOWN button.
• Continue holding the DOWN button and the display will scroll “rEStorE” to indicate that a system restore is about to happen. If the DOWN button is released at this point, the restore is cancelled. If the button hold is continued, the display will scroll “donE” to show completion of a system restore.
• Upon a successful restore, the original factory settings will override all changes. The bean counter is not affected.

Factory/Field Test Menu

This menu is intended to check product functionality both at the end of the factory line and in the field. This mode is entered by pressing and holding the DOWN key on the display board and Full/Half key on the keypad for 10 seconds. Once the menu is entered, the unit will start with an LED test that lights all LEDs and segments on the display. Navigation is done just like the User Menu. Refer to the table below for operation. Field Test Mode exits after stepping through all modes only – there is not a timeout.

version of the control.
3| Date Code| Display date code/serial ID| Not used with Grind’n Brew®
4| Non Resettable Bean Counter| Scroll non-resettable bean counter| Shows the total number of seconds the grinder has been grinding (non- resettable)
5| Configuration Inputs| Each digit of the display corresponds to a configuration input. The input is either “0” – disabled or “1” – enabled.| Highest Digit (left most):

• “1” – Double Hopper; “0” – Single Hopper Middle Digit (center).
• “1” – Always show bean count; “0” – Don’t show bean count Lowest Digit (right most).
• “1” – Grind’n Brew® Model; “0” – Grind Only Model

6| Display Water Temperature| Show averaged A/D reading of temperature| Show the current temperature in °F of the thermistor
7| Display Water Level 1| Show averaged A/D reading of water level 1| If

500 water level full,

If < 500 water level not full

8| Display Water Level 2| Show averaged A/D reading of water level 2| Not used with Grind’n Brew®
9| Show Input| Display scrolls “ InPut ”| Input Test Mode
10| Input Test| Press each key and the display will show a number related to that key|

• Hopper Button : 12
• Size Button: 10
• Grind/Brew Button : 8
• Down Button: 0
• Up Button : 2
• Start Switch: 16 Basket Out Switch : 17
• Select Button: advances Factory Test to Step 11

11| Show Output| Display scrolls “ outPut ”| Output Test Mode
12| Output Test| Turns on each relay separately. Displays “O##“ where = 2 digit output number

IMPORTANT: Each output will be turned ON when its number is on the display REGARDLESS of temperature or fill level. Be CAREFUL not to overfill the tank and keep electric items out of the way of the brew channel.

| Scroll through relay outputs with the UP and DOWN keys. Outputs are as follows

• O01 : Fill Valve O02: Brew Valve O03 : Grind Shutter
• O04 : Left Auger Motor O05: Right Auger Motor O06: not used
• O07 : Heater
• O08 : Grinder Motor O09: Basket Out Light O10: Ready Light

Water System Errors

There are three system errors that can be detected by the microprocessor. These errors are

1. Water Fill Error (Er1) – the water full detection has failed, and the fill valve has been on for at least 5 minutes.
2. Thermistor Error (Er2) – the Thermistor is detected either open, shorted OR the water is boiling.
3. Heater Error (Er3) – the heater has been on for 3 minutes, but no rise in water temperature was detected.

If any of these errors are detected, the unit will shut off all water fill and heat related functions. Brewing is disabled, but grinding is still allowed. The display will show the error when the unit is idle. To clear any error, the user can hold in the UP key for 5 seconds, reset power to the unit or enter field test mode.

Timer Settings

A standard 64 oz. bottle Grind’n Brew All

| Setting Single Bean| Approx. yield| Setting Dual Bean| Approx. yield
---|---|---|---|---
Single/Left Full Pot| 4.2 sec.| 2 oz.| 5.7 sec.| 2 oz.
Right Full Pot| –| –| 5.7 sec.| 2 oz.
Single/Left Half Pot| 2.4 sec.| 1.25 oz.| 3.0 sec.| 1.25 oz.
Right Full Pot| –| –| 3.0 sec.| 1.25 oz.
Full Pot| 112-125 sec.| 62 fl oz.| 112-125 sec.| 62 fl oz.
Half Pot| 56-63 sec.| 31 fl oz.| 56-63 sec.| 31 fl oz.

Airpot Grind’n Brews

| Setting Single Bean| Approx. yield| Setting Dual Bean| Approx. yield
---|---|---|---|---
Single/Left Full Pot| 4.5 sec.| 2.3 oz.| 6.2 sec.| 2.3 oz.
Right Full Pot| –| –| 6.2 sec.| 2.3 oz.
Single/Left Half Pot| 2.7 sec.| 1.4 oz.| 3.7 sec.| 1.4 oz.
Right Full Pot| –| –| 3.7 sec.| 1.4 oz.
Full Pot| 140-153 sec.| 72 fl oz.| 140-153 sec.| 72 fl oz.
Half Pot| 70-77 sec.| 36 fl oz.| 70-77 sec.| 36 fl oz.

• Increase of 1 sec. to timer setting equates to an increase in fluid volume by 1/2 oz.
• Decrease of 1 sec. to timer setting equates to a decrease in fluid volume by 1/2 oz.

Setting the Grind (Refer to Figure C)
Tools Required : #2 Phillips screwdriver, 7/8″ box wrench, large flat blade screwdriver

1. Remove front decal panel by removing screw on underside of panel and 2 screws on both sides of panel.
2. Loosen adjusting screw lock nut by turning counter clockwise.
3. Turn slotted adjusting screw clockwise to make the grind coarser or counter clockwise to make the grind finer. Generally, a 1/8 to 1/4 turn will provide the desired adjustment.
4. After adjustment has been made, re-tighten the adjusting screw lock nut.
5. Visually inspect the grind adjustment with a small portion of coffee and readjust if necessary. 6. Reinstall the front decal panel.

Maintenance

Daily Cleaning

Cabinet : The outside of the machine can be cleaned with a damp cloth, a household dusting spray or a stainless steel cleaner. Do not use any abrasive such as Scotchbrite or Brillo pads. These may mar the finish. Wipe the underside of the cabinet hood with a clean cloth. Be especially careful when using soap or detergent around the sprayhood. Any soap left on the deflector may give an unpleasant taste to the first brews.
Warmers : The warmer plate is easy to clean and will maintain its appearance longer if cleaned regularly. Coffee stains can be wiped off with a damp cloth. Use detergent or sanitizer for heavy deposits, but refrain from using abrasives.

Weekly Cleaning (Refer to Figure D)

• Slide Valve: The slide valve behind the spray deflector under the cabinet hood should be wiped off with a clean, dry cloth. Using the finger tab open the slide valve and wipe the ground coffee from inside of the spout, seal and slide valve.
  NOTE : When the machine is not in use, the finger tab will automatically activate every 60 minutes to keep clear.

• Brew Basket, Airpots and Decanters : Use commercial grade urn cleaner (as directed by manufacturer) and rinse thoroughly.

Shear Plate Replacement (Refer to Figure E)

Tools Required : #2 Phillips screwdriver, large flat blade screwdriver

1. Unplug the machine.
2. Remove the front panel. Shut off the bean flow to the grinder. Single bean units require you to pull the bean shut-off valve forward. Dual bean units require you to push the bean shut-off valve back into the slots in the hopper.
3. Remove the hopper cradle. There are 5 screws (2 in front and 3 across the back) holding the hopper cradle in place.
4. Remove the spray head. First remove the spray deflector by spinning it clockwise. Second, pull the spray nozzle away
5. Remove the grind cap by loosening the 2 screws and rotating the grind cap away from the screws.
6. Pull out the revolving burr and feedworm assembly. The sweeps on the revolving burr and feedworm assembly. The Figure E sweeps on the revolving burr must line up with the cut outs on the grind head.
7. Remove the shear cap and broken shear plate.
8. Slide the rotating burr onto the motor shaft, aligning up the sweeps with the cutouts on the grind head. Rotate the burr so that the burr is held back into the burr pocket by the sweeps on the grind head lip. Slide the drive coupler into place. Rotate the slot on the drive coupler with the feedworm. Insert a new shear plate.
9. Reassemble the remaining components in reverse order of disassembly.

Troubleshooting Guide

The following procedures must be performed by a qualified service technician.
CAUTION : Unplug power cord from outlet before cleaning or servicing the unit.

• Not enough coffee used
• Grind is too coarse
• Water not hot enough
• Too much water used (half brews)
• Coffee bed has dry areas

|

• Set to portion more coffee.
• Readjust grind to a finer grind.
• Check spray temp, should be greater than 185°F.
• Adjust brew time at the controller.
• Spray deflector broken or missing. Replace.

Strong coffee| Too much coffee used| Readjust coffee portion.
Bitter coffee| Grind is too fine| Coarsen grind setting.
Grounds in coffee| Paper filter collapsed during brewing| Use proper filter.
Brew basket overflowed|

• Too much coffee
• Coffee ground too finely
• Double batching

|

• Use no more than 3 1/2 oz. of coffee.
• Coarsen grind.
• You must dump old coffee and use fresh new filter for each brew.

Unpleasant taste| Water tank or brew basket needs cleaning|

• Clean, sanitize (de-lime).
• Refer to Regular Maintenance section.

Brewer will not brew| Basket has not been changed| Remove basket, replace filter, reinstall.
Grinder will not start when start button is pushed|

• Main power switch turned off
• No power to outlet

|

• Turn main power switch, on located on back of unit (left side from front) on.
• Check outlet with lamp or radio to verify outlet has power.
• Ensure basket is in position.
• Reset circuit breaker (located on back of unit) by pushing the reset button in until you hear a click.
• Remove basket, replace filter, reinstall.

|

• Basket out
• Circuit breaker has tripped

| Basket has not been changed
Grinder runs or hums but no coffee is dispensed|

• Shear disc is broken ****
• Obstruction in opening of auger assembly (on dual bean units)
• Obstruction in opening to grinding chamber
• Slide valve is bending

|

• Replace shear disc. See Shear Disc Replacement section.
• Remove hopper and clear obstruction.
• Remove hopper and clean obstruction.
• Check for free operation of slide valve. Adjust solenoid mount or slide valve mount as required. Make sure white slide valve gasket is not touching moving parts.
• Check for blown fuse and replace with 5 Amp fuse.

| ** Blown fuse on controller board (Dual bean only)
Quantity of coffee dispensed each throw is not the same**|

• Defective timer in controller
• Slide valve is binding

|

• Check the length of time grinder runs with watch.
• Remove upper assembly and clean obstruction.
• Check for free operation of slide valve. Adjust solenoid mount or slide valve mount as required. Make sure white slide valve gasket is not touching moving parts.

• Insufficient current due to use of extension cord
• Insufficient current due to overloaded line

|

• Plug unit directly into outlet. Do not use extension cord.
• Designate single line for unit. Do not use multi outlet box.

Basket Out light flashing (Display board displays “ER1”)|

• Water fill valve on too long
• Water supply turned off

|

• Clean or replace water fill valve.
• Turn water supply on.

Basket Out light flashing (Display board displays “ER2”)| Problem with Thermistor| Replace if defective.
Basket Out light flashing (Display board displays “ER3”)|

• Heater Relay failed
• Contactor Failed
• Heater Failed open
• Hi Temp failed
• Control Board output failed

| Replace defective component
Water not hot enough| Thermistor not set high enough| Adjust potentiometer
Water boiling (or steaming)|

• Thermistor set too high
• Defective Thermistor

|

• Adjust potentiometer.
• Replace Thermistor.

Start switch not working (Basket Out light illuminated)| Brew basket out of place| Replace basket.
No lights are on (Including Warmer light)|

• No power to brewer
• Power switch turned Off

|

• Turn power on.
• Turn switch on.

No touch pad lights (other lights o.k.)| Touch pad disconnected| Reconnect touch pad.
Too much or not enough water in decanter| Water time adjustment| Readjust.
Spray head dripping| Lime build up in dump valve| Delime unit.
Hot water spigot dripping| Faulty seal| Replace seal.
Hot water spigot not dispensing|

• Drain tube limed-up
• Defective valve seat

|

• Delime tank and drain tube.
• Replace seat.

Warmer Failure|

• Loss of power
• Defective warmer switch or warmer heater

|

• Check power source.
• Perform continuity test. Replace defective component.

Auger motor, water solenoid, shutter not working| Bus fuse on controller board is blown| Replace 5 Amp bus fuse.
Basket Out or Brew Cycle indicators will not light up|

• Polarity reversed
• LED burned out

|

• Connect black wire to + terminal of LED.
• Replace LED.

If you still need help, call our Technical Service Department at 800-695-4500 (USA & Canada only) or 502-425-4776, Monday through Friday, 8:00 AM – 8:00 PM Eastern Standard Time or an authorized service center in your area. Please have the model and serial number ready so that accurate information can be given.
Prior authorization must be obtained from Grindmaster Corporation’s Technical Services Department for all warranty claims.

Exploded View Grind’n Brew Assembly

Mounting Sheet Assembly

PART NO.       DESCRIPTION

1. 71546             GRAVITY FAUCET

2. 86836           LOCK WASHER 1/2 INTERNAL

3. 71148            TUBE SUPPORT
   06491          SPRAY HEAD DEFLECTOR

4. 71368          SPRAY HEAD NOZZLE

5. 06490         SPRAY HEAD NOZZLE (CDP)

6. 71054             MOUNTING SHEET

7. 71046            SPRAY HEAD BRACKET (older models)

8. 07220            SPRAY HEAD NUT

9. 71448            GREEN INDICATOR LIGHT

10. 71449            RED INDICATOR LIGHT

11. 70445           WHITE MOMENTARY SWITCH

12. 07206-05     NUT FAUCET

13. 71140            T-PAD ASSY SNGL ASSY DUAL   PRE 1063198
    71303           T-PAD ASSY SNGL BEAN
    71451           T-PAD ASSY DUAL BEAN
    71452          T-PAD DUAL BEAN DECAL

14. 71454           DECAL  T-PAD  DUAL BEAN

15. 71455           DECAL  T-PAD SINGLE BEAN

Warmer Assembly

Basket Arm Assembly

REV-D. ECN1127
REV-E, ECN2124
REV-F, ECN2129
GNBISO- 1.DWG,

Exploded View Hot Water Tank Assembly

Exploded View Grinder Assembly

GRINDHEAD ASSEMBLY

Single Bean Upper Assembly

Dual Bean Upper Assembly

Wiring Diagram 115/230V, 60Hz

• Tel 502-425-4776
• Fax 502-425-4664
• 1-800-695-4500 (USA & Canada only)
• P.O. Box 35020
• Louisville, KY 40232
• USA www.grindmaster.com
• email : info@grindmaster.com
• © Grindmaster Corporation, 1997
• PRINTED IN USA 1008 Form # BW-350-14
• Part #70661

References

• Grindmaster - Crathco - Cecilware Pro
• Manual-Hub.com – Free PDF manuals!

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