Bunn CDBC Operating & Service Manual
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Bunn CDBC Operating & Service Manual

Bunn cdbc: user guide
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OPERATING & SERVICE MANUAL
29707.0001B 02/04 ©2003 Bunn-O-Matic Corporation
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BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
CDBC APS, CDBCF APS
CDBC TC, CDBCF TC
(Dual Voltage Models
Starting at Serial #CDBC024477)
CDBC, CDBCF
www.bunnomatic.com

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  • Page 1 E OR Y BE S MA E OR OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION 29707.0001B 02/04 ©2003 Bunn-O-Matic Corporation Starting at Serial #CDBC024477) POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 CDBC, CDBCF CDBC APS, CDBCF APS...

  • Page 2: Table Of Contents

    REPAIR, REPLACEMENT OR REFUND. In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.

  • Page 3: User Notices

    CDBC(F) APS-DV BREWERS 120/208-240 V, 15.6-17.5 A, 2980-3850 W #29710.0007 (3 Warmers) CDBC(F)-DV BREWERS 120/208-240 V, 13.0-15.0 A, 2680-3550 W CDBC(F) APS-DV & TC-DV Page 3 Optional Field Wiring 120 V, 15.0 A, 1800 W 1PH, 2-Wire, 60HZ Optional Field Wiring 120 V, 12.5 A, 1500 W...
  • Page 4 USER NOTICES (CONT.) #02765.0000 #12364.0000 #00656.0000 29707.1 082803 Page 4...

  • Page 5: Electrical Requirements

    Models CDBC-DV, CDBC-APS DV & CDBCF TC-DV ELECTRICAL REQUIREMENTS CAUTION - 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: 120V VERSION Requires 2-wire,...

  • Page 6: Plumbing Requirements, Initial Set-Up & Coffee Brewing

    " water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer to clean the counter top. Bunn-O-Matic does not recommend the use of a saddle valve to install the brewer. The size and shape of the hole made in the supply line by this type of device may restrict water flow.

  • Page 7: Ready Indicator

    The use of a damp cloth rinsed in any mild, nonabrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment. Check and clean the sprayhead. The sprayhead holes must always remain open. BREW SWITCH Momentarily pressing and releasing the switch starts a brew cycle when the "ON/OFF" indicator is glowing.

  • Page 8: Adjustments & Optional Settings

    ADJUSTMENTS & OPTIONAL SETTINGS Setting Brew Temperature The brewer is factory set to brew at 200°F (95°C). To change this setting, press and hold the "HIDDEN" switch beneath the "®". The word "TEMP" above the "ON/OFF" switch will glow to correspond with the temporary function change of this switch.

  • Page 9: Pulse Brew Setup Procedure

    ADJUSTMENTS & OPTIONAL SETTINGS (CONT.) until you hear the solenoid click on-and-off three times (approximately 10 seconds), then release the "BREW" switch. Momentarily press and release the "BREW" switch once for each ounce (approximate) of water to be added to the prior setting and allow the brew cycle to finish. To decrease the amount of water for each brew cycle place an empty funnel in the funnel rails and an empty decanter or graduated vessel beneath the funnel.

  • Page 10: 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.
  • Page 11 TROUBLESHOOTING (cont.) REFILL CIRCUIT PROBLEM Will not fill or refill PROBABLE CAUSE 1. Power off to brewer 2. Water shut off 3. Display flashing 4. ON/OFF Switch 5. Lime build up on Probe 6. Refill Valve or Control Board Page 11 REMEDY Press OFF/ON switch on control panel to determine if power is ON.
  • Page 12 TROUBLESHOOTING (cont.) REFILL CIRCUIT (cont.) PROBLEM Fill or refill does not shut "OFF" (ON/ OFF Switch "ON") Fill or refill does not shut "OFF" (ON/ OFF Switch "OFF") PROBABLE CAUSE 1. Lime build up on probe 2. Water Level Probe Sensing Sys- 3.

  • Page 13: Heating Circuit

    TROUBLESHOOTING (cont.) HEATING CIRCUIT PROBLEM Water does not heat to proper tem- perature IMPORTANT: Make sure no tem- perature tests are taken before the ready light is "ON". Tank tempera- ture must be stabilized before read- ings are taken. PROBABLE CAUSE 1.
  • Page 14 TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM Water does not heat to proper tem- perature (cont.) IMPORTANT: Make sure no tem- perature tests are taken before the ready light is "ON". Tank tempera- ture must be stabilized before read- ings are taken. PROBABLE CAUSE 6.
  • Page 15 TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM Spitting or excessive steaming (cont.) Brewer is making unusual noises PROBABLE CAUSE 1. Lime build up on temperature probe, tank or tank heater 2. Temperature Probe 3. Control Board 1. Plumbing lines 2. Water supply 3.
  • Page 16 TROUBLESHOOTING (cont.) BREWING CIRCUIT PROBLEM Brew cycle will not start PROBABLE CAUSE 1. Display flashing 2. No water 3. No power or incorrect voltage to the brewer 4. ON/OFF switch not in the "ON" position 5. Low water temperature (Brew lockout is enabled) 6.
  • Page 17 TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM Brew cycle will not start (cont.) Consistently low beverage level in the dispenser or beverage overflows dispenser PROBABLE CAUSE 8. Control board or dispense valve 1. Brew volume NOTE: Volume adjustments must be made with sprayhead installed. 2.
  • Page 18 A fine drip or grind must be used for proper extraction. ® The BUNN paper filter must be centered in the funnel and the bed of grounds leveled by shaking gen- tly.
  • Page 19 Page 19 REMEDY Make sure sprayhead is present and holes are clear and unobstructed. (See Weak Beverage Page 18) The BUNN ® paper filter must be centered in the funnel and the bed of grounds leveled by shaking gen- tly.

  • Page 20: Diagnostics

    Intermittent flashing of the bank of temperature indicators, indicates that a fault exists. Count the number of flashes between pauses and use this chart as a guide to investigating the fault. FLASHES CAUSE Dry Plug - In Fault - Sheath of temperature probe dry for 10 minutes after power-up Low Tank Level Fault - Level probe dry for 7 minutes after fill valve is energized Low Water Temperature Fault -...

  • Page 21: Service

    SERVICE 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 equipment should be performed only by qualified service personnel.

  • Page 22: Control Board

    SERVICE (cont.) CONTROL BOARD FIG. 2 CONTROL BOARD Location: The Control Board is located inside the top cover behind the front end cap. Test Procedures: The test procedures for the control board will vary depending upon the problems experienced by the brewer.

  • Page 23: Switch Panel

    SERVICE (cont.) SWITCH PANEL FIG. 3 SWITCH PANEL Location: The Switch Panel is located in the front of the hood. Test Procedures: The test procedures for the switch panel and the control board will vary depending upon the problems experienced by the brewer. Refer to the Troubleshoot- ing guide beginning on page 10.

  • Page 24: Dispense Valve

    SERVICE (cont.) DISPENSE VALVE FIG. 4 DISPENSE VALVE Location: The dispense valve is located inside the top cover behind the front end cap. Test Procedures: 1. Disconnect the brewer from the power source. 2. Check the water level in the tank to confirm that it is within 1/2"...

  • Page 25: Limit Thermostat

    SERVICE (cont.) LIMIT THERMOSTAT FIG. 6 LIMIT THERMOSTAT Location: The limit thermostat is located inside the top access panel on the front side of the tank. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the blue and black wires from the limit thermostat.

  • Page 26: Tank Heaters

    SERVICE (cont.) TANK HEATERS Location: The tank heaters are located inside the tank and secured to the tank bottom. Test Procedures : 1. Disconnect the brewer from the power source. 2. With a voltmeter, check voltage across the white or red wire from the terminal block and black wire from the control board.
  • Page 27 SERVICE (cont.) TANK HEATERS (cont.) 20. Connect the limit thermostat to the front of the tank assembly. 21. Connect the green wire to the tank mounting bracket using #8-32 nut. 22. Connect the pink wire to the level probe. 23. Insert the temperature probe through the grom- met in the tank lid.

  • Page 28: Voltage Selector Switch

    SERVICE (cont.) VOLTAGE SELECTOR SWITCH FIG. 9 VOLTAGE SELECTOR SWITCH Location: The voltage selector switch is located on the component mounting bracket behind the front access panel. Test Procedure: 1. Disconnect the brewer from the power source. 2. Disconnect the white and blue wires from the selector switch.

  • Page 29: Refill Valve

    SERVICE (cont.) REFILL VALVE FIG. 11 REFILL VALVE Location: The refill valve is located inside the trunk on the lower center part of the component bracket. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the white and white/blue wires from the refill valve.

  • Page 30: Warmer Elements

    SERVICE (cont.) WARMER ELEMENT(S) D IS IF : FIG. 13 WARMER ELEMENTS Location: The warmer element(s) is located under the warmer plate. Test Procedures: 1. Disconnect the brewer from the power source. 2. With a voltmeter, check voltage across the two wires at the warmer element with the "ON/OFF"...

  • Page 31: Wiring Diagrams

    SCHEMATIC WIRING DIAGRAM CDBC DV LIMIT THERMOSTAT BLK-14 BLU-14 COUNTER (OPTIONAL) J1-1 J1-2 BLU-14 BLK-14 N.O. J1-1 BRN/BLK WHI/BLU J1-5 WHI/RED WHI/VIO WHI/GRN J1-10 CONTROL PANEL ASSY BREW SW LT FRNT SW J2-1 ON/OFF SW TOP FRNT SW J2-6 HIDDEN SW RT REAR SW (NOTE –...
  • Page 32 SCHEMATIC WIRING DIAGRAM CDBC APS-DV CDBCF APS/TC/LPTC-DV LIMIT THERMOSTAT BLK-14 BLU-14 COUNTER (OPTIONAL) J1-1 J1-2 BLU-14 BLK-14 N.O. J1-1 WHI/BLU J1-5 WHI/GRN J1-10 CONTROL PANEL ASSY BREW SW J2-1 ON/OFF SW J2-6 HIDDEN SW STATIC J2-11 SHIELD J3-1 J3-4 J5-1 t°...

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