Bunn ICBB Repair Manual

SERVICE & REPAIR MANUALBUNN-O-MATIC CORPORATIONPOST OFFICE BOX 3227SPRINGFIELD, ILLINOIS 62708-3227PHONE: (217) 529-6601 FAX: (217) 529-6644424

10COMPONENT ACCESS This section provides procedures for testing and replacing various major components used in this brewer should service become nece

11Location: The Control Board is located inside the top cover behind the front face plate.Test Procedures: The test procedures for the control boar

12Location:The Membrane Switch is located on the front face plate.Test Procedures: There are two methods for testing the membrane switch. The easiest

13Location:The brew valve is located inside the top cover behind the front face plate.Test Procedures:1. Refer to the Programing Section for Service

14Location:The brew valve is located inside the top cover behind the front face plate.Test Procedures:1. Refer to the Programing Section for Service

15REFILL VALVESLocation: The refi ll valve is located inside the front of the brewer.Test Procedures:1. Enter programming level 2, scroll to "

16REFILL VALVESEARLY ICB CURRENT ICB & & ITBEARLY ITCB CURRENT ITCB & ITB-DDSCREENSTRAINERSCREENSTRAINER42461 0911809Flow control used on

17FIG. 17-2 DV TANK HEATERSLocation:The tank heaters are located inside the tank and secured to the tank bottom.Test Procedures:1. With a voltmeter,

18LIMIT THERMOSTATLocation:The limit thermostat is located on the tank lid (on the front of the tank on twins).Test Procedures:1. Disconnect the brew

19Location: The temperature probe is inserted through the tank lid assembly.Test Procedures:1. Disconnect the brewer from the power source.2. With

242461 110909BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTYBunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:1) All equipment oth

20TEMPERATURE PROBERemoval and Replacement:1. Disconnect the brewer from the power source.2. Disconnect the two pin connector from J9 on control boa

21Location: The voltage selector switch is located on the component mounting bracket on the base plate.Test Procedure:1. Disconnect the brewer from

22POWER SWITCHFIG. 22-1 POWER SWITCH (ICB SHOWN)Location: The power switch is located on the lower right side of the trunk (ICB) or lower rear pane

23MEMORY BOARD SCHEMATIC WIRING DIAGRAM iTCBA, iTCBB 36460.0001C 08/09 ©2004 BUNN-O-MATIC CORPORATIONBLU-14 BLU-14 LIMIT THERMOSTAT RED RED WHI

24BRN/WHIOPTIONALSWEETENERKITSOLMEMORYBOARDSCHEMATIC WIRING DIAGRAMITCB-DV & ITCB-C-DV36460.0003A 06/08 ©2008 BUNN-O-MATIC CORPORATIONBLU-14

25BRN/WHISOLSCHEMATIC WIRING DIAGRAMITCB-DV & ITCB-C-DVWITH FACTORY SWEETENER36460.0004A 10/08 ©2008 BUNN-O-MATIC CORPORATIONBLU-14BLU-14LIM

26MEMORYBOARDSCHEMATIC WIRING DIAGRAM ICB-DV37299.0000B 02/07 ©2004 BUNN-O-MATIC CORPORATIONBLU-14BLU-14LIMITTHERMOSTATWHIWHIWHI/REDWHI/VIOWHI/R

27MEMORYBOARDSCHEMATIC WIRING DIAGRAM ICB TWIN37299.0001C 02/07 ©2005 BUNN-O-MATIC CORPORATIONBLU-14BLU-14LIMITTHERMOSTATWHIWHIWHI/REDWHI/YELWHI

28MEMORY BOARD SCHEMATIC WIRING DIAGRAM iCBA, iCBB 37299.0002B 08/09 ©2005 BUNN-O-MATIC CORPORATIONBLU-14 BLU-14 LIMIT THERMOSTAT RED RED WHI/R

29MEMORYBOARDSCHEMATIC WIRING DIAGRAM ICB TWIN 230V37299.0004A 12/08 ©2008 BUNN-O-MATIC CORPORATIONBLU-14BLU-14LIMITTHERMOSTATREDREDWHI/REDWHI/Y

3INTRODUCTIONThis equipment will brew a half-gallon batch of coffee into an awaiting dispenser. It can be easily confi gured for 120V 15 amp, 120/208V

3042461 0911809SCHEMATIC WIRING DIAGRAM ITBSINGLE & DUAL DILUTION MODELSAND MODELS w/OPTIONAL SWEETENER42377.0000B 12/09 ©2009 BUNN-O-MATIC

4TROUBLESHOOTINGA troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem

5Will not refi llRefi ll does not shut offPower "ON"Refi ll does not shut offPower "OFF"PROBABLE CAUSE REMEDYPROBLEM1. Power off to b

6HEATING CIRCUIT1. Display's error message2. Water not touching main (short) level probe3. Water Level Probe Sensing System4. Temperature Probe5.

7TROUBLESHOOTING (cont.)PROBLEMPROBABLE CAUSE REMEDYBREWING CIRCUITBrew cycle will not startConsistently low beverage level in the dispenser or bevera

8TROUBLESHOOTING (cont.)PROBLEM PROBABLE CAUSE REMEDYBREWING CIRCUIT (cont.)Dripping from sprayheadWeak beverageDry coffee grounds remain in the funne

9DIAGNOSTICSPROBABLE CAUSE REMEDYMESSAGETemperature Too LowHeating Time Too LongFill Time Too LongTemp Sensor Out Of Range, Check For Bad ConnectionsT