Instruction/ maintenance manual of the product ITB/ITCB Bunn
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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.
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 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.
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.
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.
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.
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.
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.
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.
10 COMPONENT A CCESS This section provides procedures for testing and replacing various major components used in this brewer should service become necessar y .
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 .
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.
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.
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.
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.
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.
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.
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.
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).
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.
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.
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.
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.
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 # / .
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 # / .
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.
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.
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.
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.
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 # / .
An important point after buying a device Bunn ITB/ITCB (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn ITB/ITCB yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn ITB/ITCB - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn ITB/ITCB you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn ITB/ITCB will certainly help you make a decision on the purchase.
If you already are a holder of Bunn ITB/ITCB, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn ITB/ITCB.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn ITB/ITCB. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn ITB/ITCB along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
