ICB ICB-DV Infusion Series® with Smart Funnel® OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 37077.0000D 07/06 ©2004 Bunn-O-Matic Corporation www.bunn.
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) All equipment other than as specified below: 2 years parts and 1 year labor. 2) Electronic circuit and/or control boards: parts and labor for 3 years. 3) Compressors on refrigeration equipment: 5 years parts and 1 year labor.
INTRODUCTION This equipment will brew coffee into an awaiting server or airpot. The Dual Voltage model can be easily configured for 120V 15 amp, 120/208V 20 amp or 120/240V 20 amp. The brewer may have an auxillary hot water faucet. It is only for indoor use on a sturdy and level counter or shelf. Please install in an area where there are no water jet devices.
USER NOTICES Carefully read and follow all notices in this manual and on the equipment. All labels on the equipment should be kept in good condition. Replace any unreadable or damaged labels. #00656.0000 #00986.0000 #37881.0000 /PTIONAL &IELD 7IRING For 120/208V or 120/240 volt operation, replace Power Supply Cord only with Bunn-O-Matic part number 01699.0000. 6 ! 7 0( 7IRE '.$ (: #34072.0000 #29710.
USER NOTICES (CONT.) 120/208V 120/240V 120V #34056.
ELECTRICAL REQUIREMENTS WARNING - The brewer must be disconnected from the power source until specified in Initial Set-Up. Requirements for brewers without an attached cord set are as follows: Refer to Data Plate on the Brewer, and local/national electrical codes to determine circuit requirements. BACK WHITE RED WHI BLK GREEN RED L2 WHI N 120V. A.C. L1 GREEN 120V AC single phase models BLK GREEN L2 N BLK 120V. A.C. 208 or 240V. A.C. 120V. A.C. RED L1 GREEN L1 200 or 230V. A.C.
PLUMBING REQUIREMENTS This brewer must be connected to a cold water system with operating pressure between 20 and 90 psi (138 and 620 kPa) from a 1⁄2" (12.7 mm) or larger supply line. A shut-off valve should be installed in the line before the brewer. Install a regulator in the line when pressure is greater than 90 psi (620 kPa) to reduce it to 50 psi (345 kPa). The water inlet fitting is 3⁄8" (9.5 mm) flare. NOTE - Bunn-O-Matic recommends 3⁄8" (9.5 mm) copper tubing for all installations from the 1⁄2" (12.
OPERATING CONTROLS A B D F 4- READY TO BREW WATER TEMP: 200° FULL E "2%7 ! G "2%7 " "2%7 # HALF C A. ON/OFF SWITCH Pressing the "ON/OFF" pad will alternately turn the brewer on and off. Pressing this pad during the brew cycle will interrupt the brew cycle, stopping the flow of water. Pressing this pad during programming of the brewer will exit the setup and return to the main screen. B.
INITIAL SET-UP 1. 2. 3. 4. 5. 6. 7. 8. Insert an empty funnel into the funnel rails. Place an empty server under the funnel. Connect the brewer to the power source. Make sure the ON/OFF switch is ON (LED will be lit). Water will flow into the tank and stop when the tank is filled to its capacity. Display will show PLEASE WAIT... TANK FILLING until tank is filled with water. Wait approximately twenty minutes for the water in the tank to heat to the proper temperature. Display will show READY TO BREW...
COFFEE BREWING WITHOUT A SMART FUNNEL AND MHG or DBC GRINDER: 1. Begin each brew cycle with a clean empty brew funnel. 2. Insert a BUNN filter into the funnel. 3. Pour the fresh coffee into the filter and level the bed of grounds by gently shaking. 4. Slide the funnel into the funnel rails until it stops. 5. Place an empty server under the funnel. 6. The ON/OFF must be ON. Select the desired batch size. 7. Momentarily press and release the assigned BREW button.
CLEANING 1. The use of a damp cloth rinsed in any mild, nonabrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment. Do NOT clean this equipment with a water jet device. 2. Check and clean each sprayhead. The sprayhead holes must always remain open. NOTE: Any buildup on the sprayhead and fitting may restrict water flow, and impact your coffee brewing. For consistently great coffee, clean sprayhead and fitting weekly with sprayhead cleaning tool (#38227.0000).
GLOSSARY AD CARD: An assembly consisting of computer chips and an instruction label. Used for loading advertising messages into the brewer. AUTO PULSE BREW SETUP: The setting of a pulse brew routine by entering in the total desired water delivery time. The brewer will then calculate and perform a pulse brew routine using a predetermined formula. BREW LOCKOUT: The inability to initiate a brew if the water temperature is less than the ready temperature programmed into the brewer.
GLOSSARY (Continued) RECIPE: Set of brewing parameters stored in the brewer. The parameters are unique for each coffee name. Coffee recipes include brew ounces, bypass percentages, pulse brew or pre-infusion and drip time. RECIPE CARD: An assembly consisting of a computer chip and an instruction label. Used for loading a recipe into the brewer and the companion DBC or MHG Grinder.
PROGRAMMING Using the menu-driven display on the front of the brewer, the operator has the ability to alter or modify various brewing parameters such as brew temperatures, brew volumes, bypass percentages, pulse brew, etc. This allows for the precise brewing of various flavors of coffee. Programming of the brewer is achieved by entering a certain function. Then, by the use of hidden programming switches and the brew/function buttons, the operator can customize the brewing process to their specifications.
PROGRAMMING THE BREWER The programming of the brewer is divided into two levels. There is one function in Level 1. All other functions are accessed in Level 2. The following function screens are in order of appearance. Each screen will have instructions on how to access and the procedures for programming the various functions of the brewer. IMPORTANT PROGRAMMING NOTES - READ CAREFULLY To exit the programming mode at any time, press and release the ON/OFF pad located on the front switch panel.
PROGRAMMING THE BREWER (cont.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL I BREW LOCKOUT This function allows the operator to prevent or allow brewing if the water temperature is less than the set READY temperature. Procedure for setting Brew Lockout: 1. To access this function screen press and hold the right hidden button. Release when the display reads: BREW LOCKOUT? NO DONE BREW A BREW B YES BREW C Press here Press here Press here for DONE for YES for NO 2. The YES or NO should be flashing.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) The functions in the second level of programming allow the operator to adjust brew settings and other feature options. To access the level 2 function screens press and hold the right hidden button. Release when the display SET LANGUAGE This function allows the operator to select the language used for the display. Procedure for setting Language: 1. Press and hold the right hidden button until the display reads SET LANGUAGE? and release.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) UNITS This function allows the operator to select if numeric settings are displayed in English or Metric units. Procedure for setting the Units: 1. Press and hold the right hidden button until the display reads SET LANGUAGE? Press and release the right hidden button until the display reads UNITS. The METRIC or ENG should be flashing. 2. Select METRIC to have settings displayed in Metric units.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) REVIEW RECIPES (Modify recipe, set up standard recipes) This function has three parts: 1. It allows the operator to view the brew settings for the various coffee recipes stored into the brewer. 2. It allows the operator to modify (change) any of the brew settings for a particular recipe stored in the brewer. 3. It is used to set up the standard recipes for prestored recipe names. 6.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) ASSIGN RECIPE This function allows the operator to assign recipes to the three brew buttons. Standard recipes and any saved recipes from a Smart Funnel or Recipe Card can be assigned to a brew button. Only one recipe per brew button is allowed, for a total three recipes available to brew. 2. Press and release DONE to disable that brew switch.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) SET NEW RECIPE (to set a new COFFEE recipe using a Smart Funnel or RECIPE CARD) Using a Smart Funnel and a G9-2T DBC or MHG Grinder: This function allows the operator to set BREW VOLUMES, BYPASS PERCENTAGE, PULSE BREW TIMES AND DRIP OUT TIMES for each coffee name preset in the grinder’s memory. Certain coffee names are stored in the grinder’s memory.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) Procedure for Setting the Recipe: NOTE: Before beginning setup, place a server beneath the brew funnel. 1. Insert the funnel into the grinder and select the small batch size to grind. It is not necessary to have coffee beans in the hopper(s) in order to program the brewer. The coffee name is pre-selected and stored in the grinder’s memory for the side being ground. 2. Press the GRIND pad.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) release DONE. The display should read 2 BATCHES DONE? 16. If both batch sizes are not correct press and release NO to return to the %BYPASS function and repeat steps #13, 14 and 15. 17. If both batch sizes are correct, press YES. This will advance to the SET PULSE BREW function (Refer to page 28 for description of SET PULSE BREW function. 18.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) SET NEW RECIPE Using a RECIPE CARD to load coffee names and brew settings The G9-2T DBC or MHG Grinder’s memory contains certain coffee names. If the operator uses a coffee name that is not already stored in the grinder’s memory, a RECIPE CARD can be obtained from the factory. The RECIPE CARD would include all the information needed to set up that particular coffee name.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) Procedure for modifying COFFEE recipes: Coffee recipes: BREW OZ: Range: OFF, 10.0 oz to 224.0 oz (.3-6.6 L) for both batch sizes REVIEW RECIPES NO YES BREW A BREW B BREW C This function allows adjustment of the brew volumes for each batch. 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads REVIEW RECIPES. 2. Press YES to proceed.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) REVIEW RECIPES NO YES Coffee recipes: %BYPASS: Range: 0 to 90% for both batch sizes BREW A This function allows adjustment of the amount of water that bypasses the grounds. The number signifies the percentage of the brew volume which does not flow over the coffee grounds. NOTE: If the brewer is already on the %BYPASS: screen, skip steps 1 through 6, and proceed directly to step 7. 1.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) COFFEE RECIPES: SET PULSE BREW/PREINFUSION This function allows the operator to program the brewer to “pulse” the sprayhead flow on and off during a brew cycle (start and stop the flow of water out of the sprayhead). This feature allows the ability to “fine-tune” the brewer for specific flavor profiles. Pulse brewing can be set up for any and all batch sizes.
PROGRAMMING THE BREWER (cont.) REVIEW RECIPES NO YES PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) Setting Pulse Brew – EASY Pulse Brew NOTE: If the brewer is already on the SET PULSE BREW screen, skip steps 1 through 6, and proceed directly to step 7. 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads REVIEW RECIPES. 2. Press YES to proceed. The display should now read NO-NAME COFFEE, along with MODIFY SHOW NEXT. 3.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) Setting PulseBrew/Preinfusion – MANUAL Pulse Brew NOTE: If the brewer is already on the SET PULSE BREW screen, skip steps 1 through 6, and proceed directly to step 7. 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads REVIEW RECIPES. 2. Press YES to proceed. The display should now read NO NAME COFFEE, along with MODIFY SHOW NEXT. 3.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) REVIEW RECIPES NO YES BREW A BREW B PRESSING NO WILL ADVANCE TO NEXT FUNCTION SCREEN ADVANCE TO THE RECIPE TO BE MODIFIED BREW C 1ST ON TIME X:XX (-) DONE (+) NO NAME COFFEE MODIFY SHOW NEXT BREW A BREW B BREW C BREW A SET BOTH BATCH SIZES BREW B BREW C BREW A SET BOTH BATCH SIZES SET BREW OZ XX.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) COFFEE RECIPES: DRIP TIME This function allows the operator to adjust the DRIP TIME (time from end of sprayhead flow to when liquid stops dripping from the funnel). When the brew cycle is complete, the display will show DRIPPING and will countdown the time until the funnel empties. Setting DRIP TIME: Range: OFF to 5 minutes for all batch sizes. programmed (modified) along with SETUP COMPLETE.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) SET TEMP This function allows the operator to adjust the brew water temperature in the tank. This also sets the hot water faucet dispense temperature. Procedure for setting the Set Temp Range: 185° to 205° F (85° to 96° C) 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads SET TEMP. 2. Using (-) and (+), adjust the brew and faucet temperature. 3.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) READY DEGREE This function allows the operator to set the minimum temperature allowable to start a brew cycle. The range can be from 2° to 20° F within the set temperature. The water must be at the READY temperature or higher for the display to indicate READY TO BREW. If brew lockout is enabled, the brewing process will not start below this READY temperature.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) ENABLE ADS This function allows the operator to choose whether or not to display an advertising message. An ad can be saved to the brewer by either writing the ad using the programming commands, or by entering the ad into the brewer using an AD CARD. This message will be displayed when the brewer is not in use. Procedure to Enable/Disable Ads: 1. Press and hold the right hidden button until the display reads SET LANGUAGE.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) ENABLE ADS (Continued) Procedure to READ in a New Ad: NOTE: Saving a new ad will erase any previously saved ad in the brewer’s memory. 1. From the NEW AD? screen, press and release CARD. 2. The display will show INSERT AD CARD. Place the AD CARD vertically so that the top end of the "chip" is beneath the sensing coil (located on the middle of the underneath side of the front display panel). 3.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) ENABL SANITATION This function allows the operator to enable the sanitation function and set the time before a cleaning alert will be displayed. ENABL SANITATION NO DONE YES WITH NO FLASHING PRESS DONE Procedure for enabling sanitation Range: 0.0 to 72.0 hrs 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads ENABL SANITATION.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) ENABLE ENERGYSAVR This function allows the operator to enable the mode function and set the idle time. Once the set idle time has expired, the operator can choose to have the heaters either turn off, or reduce the tank holding temp to 140° F (60 C). Procedure to enable energy savings mode Range: 0.5 to 24.0 hrs If enabled, default setting is 140° F (60° C) tank temperature after 4.0 hrs. idle time. 1.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) ENABLE FRESH TIMER This function allows the operator to enable the Freshness Alert and set the expiration time. The expiration time is the amount of time the product is allowed to sit in the server/dispenser before a fresh batch is brewed. Procedure for enabling/setting the Freshness Timer Range: Coffee 0.5 to 4.0 hrs Hot Tea 0.5 to 8.0 hrs If enabled, default setting is 2.0 hrs. for Coffee and 2.0 hrs. for Hot Tea. 1.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) REFILL Range: 0 to 155 This function allows the operator to adjust the sensitivity of the refill circuit. This is mainly a troubleshooting feature. Water in different geographical locations can have different conductivities. By adjusting the sensitivity of the refill circuit, this will allow the brewer to operate under various water conditions.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) SPRAY OZ/M This function allows the operator to view or to enter the actual flow rate coming out of the sprayhead. This is NOT used to calibrate the actual flow rate, but to tell the internal controller how fast the water is flowing. Procedure to adjust the sprayhead flow rate setting: 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads SPRAY OZ/M .
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) BYPASS OZ/M This function allows the operator to view or to enter the actual flow rate coming out of the bypass nozzle. This is NOT used to calibrate the actual flow rate, but to tell the internal controller how fast the water is flowing. Procedure to adjust the bypass flow rate setting: 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads BYPASS OZ/M.
PROGRAMMING THE BREWER (cont.) CALIBRATE FLOW? NO YES PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) CALIBRATE FLOW This function allows the operator to enter the actual flow rate of the sprayhead and the bypass by dispensing both separately for one minute. The volumes are then entered into the brewer. Procedure to calibrate the sprayhead flow rate: 1. Place a container, accurately graduated and with a minimum capacity of 60 ounces, beneath the funnel. 2.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) CALIBRATE FLOW (Continued) Procedure to calibrate the bypass flow rate: 1. Place a container, accurately graduated and with a minimum capacity of 60 ounces, beneath the funnel. NOTE: If the display is already on the BYPASS CAL screen, skip steps 2 & 3 and proceed directly to step 4. 2. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads CALIBRATE FLOW. 3.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) BREW COUNTERS This function allows the operator to track the total number of brew cycles completed, as well as the number of batches brewed using each of the brew buttons. There are three resettable counters, and one life counter that is not resettable. Procedure to view/reset the brew counters: 1. Press and hold the right hidden button until the display reads SET LANGUAGE.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) ASSET NUMBER This function allows the operator to enter in the machine's asset number. This can be useful for tracking the usage or service of an individual machine within a group. Procedure to enter the asset number: 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads: ENTER ASSET #? 2. Press and release YES. The display will now read ANXXXXXX. 3.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) SERVICE NUMBER This function allows the operator to enter in the telephone number to call if service is needed. The service number will be displayed anytime there is a fault message displayed (SeeTroubleshooting on page 56). Procedure to enter the service number: 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads: ENTER SERVICE #? 2. Press and release YES.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) SERVICE TOOLS This function allows the testing of individual components and the ability to check switches for proper function. This function also tests the funnel sensor coil’s frequency (diagnostic tool for troubleshooting purposes only). Procedure to test components and outputs: The following components can be individually tested: Brew Valve Bypass Valve Refill Valve Tank Heater Relay Tank Heater Triac Funnel Lock (Optional) 1.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) SERVICE TOOLS? NO YES Procedure to test switches: The following switches can be individually tested: Half Batch Full Batch Left Hidden Brew A Brew B Brew C On/Off PRESSING NO WILL ADVANCE TO FACTORY DEFAULTS BREW A BREW B BREW C TEST OUTPUTS? NO YES 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads SERVICE TOOLS. 2. Press and release YES.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) Procedure to test coil frequency: 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads SERVICE TOOLS. 2. Press and release YES. The display should now read TEST OUTPUTS? Press and release NO to advance to TEST SWITCHES. 3. Press and release NO to advance to TEST FREQUENCY. 4. The display should now show the frequency of the sensor coil circuit.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) FACTORY DEFAULTS This function allows the operator to erase ALL of the previously entered recipes and ad messages. Factoryset default values will replace ALL previous settings. Procedure to set factory defaults: 1. Press and hold the right hidden button until the display reads SET LANGUAGE. Press the right hidden button until the display reads FACTORY DEFAULTS. 2. Pressing NO will return to the MAIN SCREEN. Press YES to restore defaults.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.
PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL 2 (cont.
TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department. • • • • • • • Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel. All electronic components have 120-240 volt ac and low voltage dc potential on their terminals.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Temperature Too Low 1. Water temperature in the tank does not meet the ready temperature. A) Wait for the brewer to heat to the proper temperature. B) Disable the BREW LOCKOUT function. See page 17 for procedure. Heating Time Too Long 1. Tank Heater failure. Service required 2. Control Board/Thermistor failure Service required 1. Water shut off to brewer Check water supply shut-off 2. Tank Drain clamp is shut Check tank drain clamp 3.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start 1. No water Check plumbing and shut-off valves 2. No power or incorrect voltage to the brewer Check for voltage across the terminals at the terminal block. 3. ON/OFF switch Test the ON/OFF switch. Refer to the test switch procedures on page 50. 4. Brew switch Test the BREW switch. Refer to the test switch procedures on page 50. 5. Brew valve Test the brew valve. Refer to the test outputs procedures on page 48. 6.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Automatic refill will not operate or display shows FILL TIME TOO LONG 1. No water Check plumbing and shut-off valves 2. Tank drain clamp Check tank drain clamp 3. Water Strainer Direction of flow arrow must be pointing towards direction of water flow. 4. Refill probe or Sensitivity setting Remove the strainer and check for obstructions. Clear or replace. 5. Refill valve Check the sensitivity setting. Refer to the REFILL function on page 40.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Automatic refill will not operate or display shows FILL TIME TOO LONG (Continued) 5. Refill valve (Continued) Refill valve – Disconnect the brewer from the power source and remove wires from refill valve coil. Check for continuity across the terminals of the solenoid coil. If continuity is not present, replace the refill valve. If continuity is present, the coil may be stuck closed. Shut water off to brewer.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water flows into tank continuously with power removed from brewer. 1. Refill valve Foreign material lodged in valve, holding it in open state. 2. Refill probe or sensitivity setting Check the sensitivity setting. Refer to the REFILL function on page 40. If the left three digit number is less than the right number, the machine “thinks” it is full and the refill valve should be off.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water will not heat or display shows HEATING TIME TOO LONG. 1. Limit Thermostat Remove power from the brewer. Check for continuity through the limit thermostat. CAUTION: Do not eliminate or bypass limit thermostat. Use only replacement part 29329.0001. 2. Temperature probe Remove the probe from the grommet and submerge in a water bath of approximately 70°F (21°C). Connect an ohmmeter to the pins in the connector.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water will not heat or display shows HEATING TIME TOO LONG. (Continued) 4. Tank heaters Remove power from the brewer. Check for continuity between the white terminal of the terminal block (or red terminal on 208/240V models) and the black wire on the relay on the control board (Toggle switch must be in 120/208-240V position on 208V and 240V models). There should be a low OHM reading.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY No bypass water 1. Bypass valve Test the bypass valve. Refer to the test outputs procedures on page 48. 2. Recipe settings Check to make sure bypass % has been set for the current recipe.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or unusual steaming from sprayhead or air vent. 1. Lime buildup Inspect the probe and tank assembly for excessive lime deposits. Delime as required. 2. Temperature probe Remove the probe from the grommet and submerge in a water bath of approximately 70°F (21°C). Connect an ohmmeter to the pins in the connector. At 60°F (16°C), the reading should be 15.3k ± 2k OHMS, at 70°F (21°C) the reading should be 11.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Inconsistent beverage level in server/dispenser 1. Strainer Direction of flow arrow must be pointing towards the brewer. Remove the strainer and check for obstructions. Clear or replace. 2. Improper water pressure Check operating water pressure to the brewer. It must be between 20 and 90 psi (138 and 620 kPa). 3. Brew valve Test the brew valve. Refer to test outputs on page 48.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Dripping from sprayhead. 1. Brew valve Repair or replace leaky valve Water overflows filter. 1. Type of paper filter BUNN paper filters should be used for proper extraction 2. No sprayhead Check sprayhead 1. Beverage left in server from previous brew The brew cycle should be started only with an empty server under the funnel. 2.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Weak beverage. 1. Type of paper filter BUNN paper filters should be used for proper extraction 2. Coffee For coffee, a sufficient quantity of fresh drip or regular grind should be used for proper extraction. 3. Sprayhead Bunn-O-Matic sprayhead should be used to properly wet the bed of ground coffee in the funnel 4. Funnel Loading The BUNN paper filter should be centered in the funnel and the bed of grounds leveled by gently shaking. 5.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Brewer is making unusual noises. 1. Solenoids The mounting screws on the solenoids must be tight or they will vibrate during operation 2. Plumbing lines Plumbing lines should not be resting on the countertop. 3. Water supply The brewer must be connected to a cold water line. Water pressure to the brewer must not be higher than 90 psi (620 kPa). Install a regulator if necessary to lower the working pressure to approximately 50 psi (345 kPa). 4.
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