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Bunn ITB/ITCB - page 1
SER VICE & REP AIR MANU AL BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 42461.0000A 01/10 ©2010 Bunn-O-Matic Corporation ITB/ITCB ICB/TWIN Infusion Series ® ...
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Bunn ITB/ITCB - page 2
2 42461 110909 BUNN-O-MA TIC COMMERCIAL PRODUCT W ARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) All equipment other than as specifi ed 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 pa ...
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Bunn ITB/ITCB - page 3
3 INTR ODUCTION This equipment will brew a half-gallon batc h of coffee into an awaiting dispenser . It can be easily confi gured for 120V 15 amp, 120/208V 20 amp or 120/240V 20 amp. The brewer may ha ve a hot water faucet for allied be verage use . It is only f or indoor use on a sturd y counter or shelf. CONTENTS Warranty ....................... ...
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Bunn ITB/ITCB - page 4
4 TR OUBLESHOO TING 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 T echnical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only by q ...
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Bunn ITB/ITCB - page 5
5 Will not refi ll Refi ll does not shut off Power "ON" Refi ll does not shut off Power "OFF" PROB ABLE CA USE REMED Y PROBLEM 1. Power off to brewer 2. Water shut off 3. Error Message 4.ON/OFF Switch (If equipped) 5. Lime build up on Probe(s) 6. Refi ll Valve or Control Board 1. Lime build up on probe 2. Water Level Sensing ...
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Bunn ITB/ITCB - page 6
6 HEA TING CIRCUIT 1. Display's error message 2. Water not touching main (short) level probe 3. Water Level Probe Sensing System 4. T emperature Probe 5. Limit Thermostat or TCO 6. T ank Heater 1. Lime build up on temperature probe, tank or tank heater 2. T emperature Probe 3. Control Board 1. Plumbing lines 2. Water supply 3. Lime build up Br ...
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Bunn ITB/ITCB - page 7
7 TROUBLESHOO TING (cont.) PROBLEM PR OB ABLE CA USE REMED Y BREWING CIRCUIT Brew cycle will not start Consistently low beverage level in the dispenser or beverage overfl ows dispenser 1. Display's error message 2. No water 3. No power or incorrect voltage to the brewer 4. ON/OFF switch not in the "ON" position 5. Low water temperat ...
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Bunn ITB/ITCB - page 8
8 TROUBLESHOO TING (cont.) PROBLEM PROB ABLE CA USE REMED Y BREWING CIRCUIT (cont.) Dripping from sprayhead Weak beverage Dry coffee grounds remain in the funnel Low beverage serving tempera- ture 1. Lime build up 2. Dispense valve 1. Sprayhead 2. Water temperature 3. Filter type 4. Coffee grind 5. Funnel loading 1. Sprayhead 2. Funnel loading 1. T ...
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Bunn ITB/ITCB - page 9
9 DIA GNOSTICS PROB ABLE CA USE REMED Y MESSA GE T emperature T oo Low Heating Time T oo Long Fill Time T oo Long T emp Sensor Out Of Range, Check For Bad Connections T emp Sensor Out Of Range, Check Wire For Shorts 1. Water temperature in the tank does not meet the ready tempera- ture. 1. T ank Heater failure. 2. Control Board/Thermistor fail- ure ...
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Bunn ITB/ITCB - page 10
10 COMPONENT A CCESS This section provides procedures for testing and replacing various major components used in this brewer should service become necessar y . Refer to T roubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualifi ed ...
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Bunn ITB/ITCB - page 11
11 Location: The Control Board is located inside the top cover behind the front face plate. T est Procedures: The test procedures for the control board will vary depending upon the problems experienced by the brewer . Refer to the T roubleshooting section which is divided into three sections, Refi ll Cir cuit, Heating Circuit, and Brewing Cir cuit ...
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Bunn ITB/ITCB - page 12
12 Location: The Membrane Switch is located on the front face plate. T est Procedures: There are two methods for testing the membrane switch. The easiest method is to use the built in test mode. Refer to the Programing Section for Service T ools/T est Switches. If for some reason you can't get into the program modes, or brewer won't power ...
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Bunn ITB/ITCB - page 13
13 Location: The brew valve is located inside the top cover behind the front face plate. T est Procedures: 1. Refer to the Programing Section for Service T ools/ T est Outputs/Brew Valve. 2. Be sure brew funnel & server are in place before activating valve. 3. Check the valve for coil action. T urn on the valve with the test mode. Listen carefu ...
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Bunn ITB/ITCB - page 14
14 Location: The brew valve is located inside the top cover behind the front face plate. T est Procedures: 1. Refer to the Programing Section for Service T ools/ T est Outputs/Brew Valve. 2. Be sure brew funnel & server are in place before activating valve. 3. Check the valve for coil action. T urn on the valve with the test mode. Listen carefu ...
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Bunn ITB/ITCB - page 15
15 REFILL V AL VES Location: The refi ll valve is located inside the front of the brewer . T est Procedures: 1. Enter programming level 2, scroll to "Service T ools" then scroll to "Refi ll Valve". 2. Br iefl y activate the refi ll valve in the test mode. With a voltmeter , check the voltage across the coil wires. 3. The ind ...
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Bunn ITB/ITCB - page 16
16 REFILL V AL VES EARL Y ICB CURRENT ICB & & ITB EARL Y ITCB CURRENT ITCB & ITB-DD SCREEN STRAINER SCREEN STRAINER 42461 0911809 Flow control used on dual dilution models only ...
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Bunn ITB/ITCB - page 17
17 FIG. 17-2 D V T ANK HEA TERS Location: The tank heaters are located inside the tank and secured to the tank bottom. T est Procedures: 1. With a voltmeter , check voltage across the white wire (120V Models) or red wire (120/208-240V Models) from the terminal block and black wire from the control board. Connect brewer to the power source. The indi ...
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Bunn ITB/ITCB - page 18
18 LIMIT THERMOST A T Location: The limit thermostat is located on the tank lid (on the front of the tank on twins). T est Procedures: 1. Disconnect the brewer from the power sour ce and allow to cool. 2. Disconnect the wires from the limit thermostat. 3. With an ohmmeter , check for continuity across the limit thermostat terminals. If continuity i ...
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Bunn ITB/ITCB - page 19
19 Location: The temperature probe is inserted through the tank lid assembly . T est Procedures: 1. Disconnect the brewer from the power source. 2. With a DC voltmeter , check voltage across the two wires at J13 (J3 on ITB) on control board (black probe to black wire, red probe to white wire refer to FIG 19-2). Connect the brewer to the power sourc ...
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Bunn ITB/ITCB - page 20
20 TEMPERA TURE PROBE Remov al and Replacement: 1. Disconnect the brewer from the power source. 2. Disconnect the two pin connector from J9 on control board. 3. Pull temperature probe out of it's grommet. 4. Install in reverse order . Calibration: 1. Remove silicon vent fi tting from tank lid. 2. Insert a digital temp probe through the expose ...
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Bunn ITB/ITCB - page 21
21 Location: The voltage selector switch is located on the component mounting bracket on the base plate. T est Procedure: 1. Disconnect the brewer from the power source. 2. Disconnect the wires from the selector switch. With the selector switch in the 120V position, check for continuity between the two right terminals of the switch. 3. With the sel ...
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Bunn ITB/ITCB - page 22
22 PO WER SWITCH FIG. 22-1 PO WER SWITCH (ICB SHO WN) Location: The power switch is located on the lower right side of the trunk (ICB) or lower rear panel (ITCB). T est Procedure: 1. Disconnect the brewer from the power source. 2. Disconnect the wires from the power switch. With the switch in the ON position, check for continuity between the upper ...
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Bunn ITB/ITCB - page 23
23 MEMORY BOARD SCHEMA TIC WIRING DIA GRAM iTCB A, iTCBB 36460.0001C 08/09 ©2004 BUNN-O-MA TIC CORPORATION BLU-14 BLU-14 LIMIT THERMOST AT RED RED WHI/VIO WHI/VIO WHI/VIO RED RED REFILL DISPENSE J1-1 J1-2 J17-1 J17-5 J15-1 J15-5 J17-10 J17-14 # / . 4 2 / , 0 # " / ! 2 $ COM N.O. VIO BLK BLK-14 BLK-14 BLK-14 WHI/GRN WHI/GRN WHI/BLU RED WHI ...
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Bunn ITB/ITCB - page 24
24 BRN/WHI OPTIONAL SWEETENER KIT SOL MEMORY BOARD SCHEMA TIC WIRING DIA GRAM ITCB-D V & ITCB-C-D V 36460.0003A 06/08 ©2008 BUNN-O-MA TIC CORPORATION BLU-14 BLU-14 LIMIT THERMOST AT WHI WHI WHI/VIO WHI/VIO WHI/VIO WHI WHI REFILL DISPENSE J1-1 J1-2 J17-1 J17-5 J15-1 J15-5 J17-10 J17-14 # / . 4 2 / , 0 # " / ! 2 $ COM N.O. VIO BLK BLK-14 BL ...
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Bunn ITB/ITCB - page 25
25 BRN/WHI SOL SCHEMA TIC WIRING DIA GRAM ITCB-D V & ITCB-C-D V WITH F A CT OR Y SWEETENER 36460.0004A 10/08 ©2008 BUNN-O-MA TIC CORPORATION BLU-14 BLU-14 LIMIT THERMOST AT WHI WHI WHI/VIO WHI/VIO WHI/VIO WHI WHI WHI REFILL DISPENSE J1-1 J1-2 J17-1 J17-5 J15-1 J15-5 J17-10 J17-14 # / . 4 2 / , 0 # " / ! 2 $ COM N.O. VIO BLK BLK-14 BLK-14 ...
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Bunn ITB/ITCB - page 26
26 MEMORY BOARD SCHEMA TIC WIRING DIA GRAM ICB-D V 37299.0000B 02/07 ©2004 BUNN-O-MA TIC CORPORATION BLU-14 BLU-14 LIMIT THERMOST AT WHI WHI WHI/RED WHI/VIO WHI/RED WHI WHI REFILL DISPENSE J1-1 J1-2 J17-1 J17-5 J15-1 J15-5 J17-10 J17-14 # / . 4 2 / , 0 # " / ! 2 $ COM N.O. VIO BLK BLK-14 BLK-14 BLK-14 WHI/GRN WHI/GRN WHI/BLU WHI WHI/BLU FUNNE ...
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Bunn ITB/ITCB - page 27
27 MEMORY BOARD SCHEMA TIC WIRING DIAGRAM ICB TWIN 37299.0001C 02/07 ©2005 BUNN-O-MA TIC CORPORATION BLU-14 BLU-14 LIMIT THERMOST AT WHI WHI WHI/RED WHI/YEL WHI WHI REFILL RIGHT DISPENSE J21-1 J21-3 J17-1 J17-5 J15-1 J15-5 J17-10 J17-14 # / . 4 2 / , 0 # " / ! 2 $ COM N.O. YEL BLK-14 BLU-14 WHI/GRN WHI/BLU WHI RIGHT FUNNEL SENSOR 120/208 OR 1 ...
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Bunn ITB/ITCB - page 28
28 MEMORY BOARD SCHEMA TIC WIRING DIAGRAM iCBA, iCBB 37299.0002B 08/09 ©2005 BUNN-O-MA TIC CORPORATION BLU-14 BLU-14 LIMIT THERMOST AT RED RED WHI/RED WHI/VIO WHI/RED RED RED REFILL DISPENSE J1-1 J1-2 J17-1 J17-5 J15-1 J15-5 J17-10 J17-14 # / . 4 2 / , 0 # " / ! 2 $ COM N.O. VIO BLK BLK-14 BLK-14 BLK-14 WHI/GRN WHI/GRN WHI/BLU RED WHI/BLU ...
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Bunn ITB/ITCB - page 29
29 MEMORY BOARD SCHEMA TIC WIRING DIAGRAM ICB TWIN 230V 37299.0004A 12/08 ©2008 BUNN-O-MA TIC CORPORATION BLU-14 BLU-14 LIMIT THERMOST AT RED RED WHI/RED WHI/YEL RED RED REFILL RIGHT DISPENSE J21-1 J21-3 J17-1 J17-5 J15-1 J15-5 J17-10 J17-14 # / . 4 2 / , 0 # " / ! 2 $ COM N.O. YEL BLK-14 BLU-14 WHI/GRN WHI/BLU RED RIGHT FUNNEL SENSOR 230 VOL ...
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Bunn ITB/ITCB - page 30
30 42461 0911809 SCHEMA TIC WIRING DIA GRAM ITB SINGLE & DU AL DILUTION MODELS AND MODELS w/OPTIONAL SWEETENER 42377.0000B 12/09 ©2009 BUNN-O-MA TIC CORPORA TION RED LIMIT THERMOST A T WHI WHI/VIO WHI WHI REFILL DISPENSE J10-1 J10-5 J14-1 J14-5 J10-10 # / . 4 2 / , 0 # " / ! 2 $ TR-6 TR-1 TR-5 TR-2 BLK WHI BLU/BLK WHI/GRN WHI/YEL WHI/BLU ...
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