1. DL manuals
  2. Bunn
  3. Coffee Maker
  4. HV
  5. Service And Repair Manual

Bunn HV Service And Repair Manual

Manual is about: Infusion Series

Summary of HV

  • Page 1

    Service & repair manual bunn-o-matic corporation post office box 3227 springfield, illinois 62708-3227 phone: (217) 529-6601 fax: (217) 529-6644 42461.0000b 08/11 ©2010 bunn-o-matic corporation itb/itcb/hv icb/twin infusion series ®.

  • Page 2

    2 42461 050511 bunn-o-matic commercial product warranty 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) compress...

  • Page 3

    3 introduction this 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 20 amp or 120/240v 20 amp. The brewer may have a hot water faucet for allied beverage use. It is only for indoor use on a sturdy counter or shelf. ...

  • Page 4

    4 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 elect...

  • Page 5

    5 will not refi ll refi ll does not shut off power "on" refi ll does not shut off power "off" probable cause remedy 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...

  • Page 6

    6 heating circuit 1. Display's error message 2. Water not touching main (short) level probe 3. Water level probe sensing system 4. Temperature probe 5. Limit thermostat or tco 6. Tank heater 1. Lime build up on temperature probe, tank or tank heater 2. Temperature probe 3. Control board 1. Plumbing ...

  • Page 7

    7 troubleshooting (cont.) problem probable cause remedy 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" p...

  • Page 8

    8 troubleshooting (cont.) problem probable cause remedy 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. Funn...

  • Page 9

    9 diagnostics probable cause remedy message temperature too low heating time too long fill time too long temp sensor out of range, check for bad connections temp sensor out of range, check wire for shorts 1. Water temperature in the tank does not meet the ready tempera- ture. 1. Tank heater failure....

  • Page 10

    10 component access this section provides procedures for testing and replacing various major components used in this brewer should service become necessary. Refer to troubleshooting for assistance in determining the cause of any problem. Warning - inspection, testing, and repair of electri- cal equi...

  • Page 11

    11 location: the control board is located inside the top cover behind the front face plate. Test procedures: the test procedures for the control board will vary depending upon the problems experienced by the brewer. Refer to the troubleshooting section which is divided into three sections, refi ll c...

  • Page 12

    12 control board-icb twin/itcb dv hv/itcb twin hv triac map fig. 12-1 triac map triac: load component: th1/mov4/br2 left funnel lock th2/mov1 refi ll solenoid th3/mov3/br3 right funnel lock th4b/mov2 tank heaters th5/mov5 left brew solenoid th6/mov7 right brew solenoid th7/mov8 left bypass solenoid ...

  • Page 13

    13 control board-icb/itcb triac map fig. 13-1 triac map triac: load component: th2/mov1/br2 (optional) funnel lock (icb) th4b/mov2 refi ll solenoid th6/mov4 brew solenoid th7/mov3 tank heater(s) th9/mov5 dilution or bypass solenoid connector: j17-13/j17-14 j17-5 j17-3 relay terminal j17-1 42461 0813...

  • Page 14

    14 control board-itb triac map fig. 14-1 triac map triac: load component: th1/mov3 main or left dilution th2/mov1 refi ll solenoid th3/mov2 brew solenoid th4/mov4 right dilution th6/mov6 sweetner th7/mov7 tank heater connector: j10-1 j10-2 j10-3 j10-4 j10-5 tr1/tr6 42461 081310

  • Page 15

    15 location: the membrane switch is located on the front face plate. Test 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 tools/test switches. If for some reason you can't get into the...

  • Page 16

    16 location: the brew valve is located inside the top cover behind the front face plate. Test procedures: 1. Refer to the programing section for service tools/ test outputs/brew valve. 2. Be sure brew funnel & server are in place before activating valve. 3. Check the valve for coil action. Turn on t...

  • Page 17

    17 location: the brew valve is located inside the top cover behind the front face plate. Test procedures: 1. Refer to the programing section for service tools/ test outputs/brew valve. 2. Be sure brew funnel & server are in place before activating valve. 3. Check the valve for coil action. Turn on t...

  • Page 18

    18 refill valves location: the refi ll valve is located inside the front of the brewer. Test procedures: 1. Enter programming level 2, scroll to "service tools" then scroll to "refi ll valve". 2. Briefl y activate the refi ll valve in the test mode. With a voltmeter, check the voltage across the coi...

  • Page 19

    19 refill valves early icb current icb & & itb early itcb current itcb & itb-dd screen strainer screen strainer flow control used on dual dilution models only 42461 081310

  • Page 20

    20 fig. 20-2 dv tank heaters location: the tank heaters are located inside the tank and secured to the tank bottom. Test 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....

  • Page 21

    21 limit thermostat location: the limit thermostat is located on the tank lid (on the front of the tank on twins). Test procedures: 1. Disconnect the brewer from the power source and allow to cool. 2. Disconnect the wires from the limit thermostat. 3. With an ohmmeter, check for continuity across th...

  • Page 22

    22 location: the temperature probe is inserted through the tank lid assembly. Test 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 f...

  • Page 23

    23 temperature probe removal 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. Inser...

  • Page 24

    24 location: the voltage selector switch is located on the component mounting bracket on the base plate. Test 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 t...

  • Page 25

    25 power switch fig. 25-1 power switch (icb shown) location: the power switch is located on the lower right side of the trunk (icb) or lower rear panel (itcb). Test procedure: 1. Disconnect the brewer from the power source. 2. Disconnect the wires from the power switch. With the switch in the on pos...

  • Page 26

    26 memory board schematic wiring diagram itcb-dv & itcb-c-dv 36460.0000d 02/07 ©2004 bunn-o-matic corporation blu-14 blu-14 limit thermostat 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 blk...

  • Page 27

    27 memory board schematic wiring diagram itcba, itcbb 36460.0001c 08/09 ©2004 bunn-o-matic corporation blu-14 blu-14 limit thermostat 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...

  • Page 28

    28 brn/whi optional sweetener kit sol memory board schematic wiring diagram itcb-dv & itcb-c-dv 36460.0003a 06/08 ©2008 bunn-o-matic corporation blu-14 blu-14 limit thermostat 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 # " ...

  • Page 29

    29 brn/whi sol schematic wiring diagram itcb-dv & itcb-c-dv with factory sweetener 36460.0004a 10/08 ©2008 bunn-o-matic corporation blu-14 blu-14 limit thermostat 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 $ c...

  • Page 30

    30 memory board schematic wiring diagram icb-dv 37299.0000b 02/07 ©2004 bunn-o-matic corporation blu-14 blu-14 limit thermostat 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 wh...

  • Page 31

    31 memory board schematic wiring diagram icb twin 37299.0001c 02/07 ©2005 bunn-o-matic corporation blu-14 blu-14 limit thermostat 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...

  • Page 32

    32 memory board schematic wiring diagram icba, icbb 37299.0002b 08/09 ©2005 bunn-o-matic corporation blu-14 blu-14 limit thermostat 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-1...

  • Page 33

    33 memory board schematic wiring diagram icb twin 230v 37299.0004a 12/08 ©2008 bunn-o-matic corporation blu-14 blu-14 limit thermostat 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/gr...

  • Page 34

    34 schematic wiring diagram itb single & dual dilution models and models w/optional sweetener 42377.0000b 12/09 ©2009 bunn-o-matic corporation red limit thermostat 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/g...

  • Page 35

    35 t˚ whi dilution whi/vio whi/vio sol schematic wiring diagram itcb-dv hv 43828.0000a 11/10 ©2010 bunn-o-matic corporation blu-14 blu-14 limit thermostat whi 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 c o n t r o l p c b o a r d com n.O. ...

  • Page 36

    36 schematic wiring diagram itcb hv twin 44145.0000a 01/11 ©2011 bunn-o-matic corporation blu-14 blu-14 limit thermostat whi whi whi/red whi/yel whi whi right dispense j21-1 j21-3 j17-1 j17-5 j15-1 j15-5 j17-10 j17-14 c o n t r o l p c b o a r d com n.O. Yel blk-14 blu-14 whi/grn whi/blu whi right f...

  • Page 37

    37.