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Bunn CDBC TC manual

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Table of contents for the manual

  • Page 1

    OPERA TING & SERVICE MANUAL CDBC, CDBCF CDBC APS, CDBCF APS CDBC TC, CDBCF TC (Dual V oltage Models Starting at Serial #CDBC024477) BUNN M A N U FA C T U R E D B Y B U N N -O -M A T I C C O R P O R A T IO N S P R IN G F IE L D , IL L IN O IS , U .S .A . M O D E L S / N V O L T S A . C . A M P W A T T S P H A S E W IR E H E R T Z C O V E R E D U[...]

  • Page 2

    Page 2 INTRODUCTION This equipment will brew a half-gallon batch of coffee into an awaiting dispenser. It can be easily configured 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. CONTENTS Introduction & Warranty .........[...]

  • Page 3

    Page 3 #00658.0000 #00831.0000 29707.1 082803 When re-wiring the machine for operation on 120/208V or 120/240V , the replacement P o wer Supply Cord must be UL Listed Fle xible Cord T ype SO , SJO , SJT O, HSJO or SJO W , No. 12 A WG, 4 Conductor , Rated 90 ° C . Attachment Plug Cap must be UL Listed, NEMA 14-20P or L14-20P Configuration, Rated 12[...]

  • Page 4

    Page 4 USER NOTICES (CONT .) 29707.1 082803 #12364.0000 #02765.0000 #00656.0000[...]

  • Page 5

    Page 5 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. Requires 2-wire, grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz. 120V VERSION 120/208-240V VERSION Requires 3-wire, grounded service rated 120/208-240 volts ac, 20 amp, single phase, 60 Hz. ELECTRICAL H[...]

  • Page 6

    Page 6 INITIAL SET -UP 1. Insert an empty funnel into the funnel rails. 2. Place a decanter with a small amount of water under the funnel. 3. Connect the brewer to the power source. 4. Press the "ON/OFF" switch (indicator glowing). 5. Water will flow into the tank and stop when the tank is filled to its capacity. 6. Wait approximately twe[...]

  • Page 7

    Page 7 OPERA TING CONTROLS ON/OFF SWITCH Pressing the "ON/OFF" switch (indicator glowing) supplies power to the brew station warmer, enables the brew circuit, and energizes the tank refill circuit. Pressing the switch again (indicator not glowing) stops tank refilling and brewing and de-energizes the brew station warmer. Stopping a brew c[...]

  • Page 8

    Page 8 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[...]

  • Page 9

    Page 9 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 [...]

  • Page 10

    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 b[...]

  • Page 11

    Page 11 Will not fill or refill PROBABLE CAUSE REMEDY PROBLEM 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 Press OFF/ON switch on control panel to determine if power is ON. Make sure water is ON. Brewer has shut down due to mal- function (See Diagnostic Char[...]

  • Page 12

    Page 12 TROUBLESHOOTING (cont.) Fill or refill does not shut "OFF" (ON/ OFF Switch "ON") Fill or refill does not shut "OFF" (ON/ OFF Switch "OFF") PROBABLE CAUSE REMEDY PROBLEM 1. Lime build up on probe 2. Water Level Probe Sensing Sys- tem 3. Refill valve or control board 1. Refill valve or control board Rem[...]

  • Page 13

    Page 13 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY HEATING CIRCUIT 1. Display flashing 2. Water not touching temperature probe 3. Water Level Probe Sensing Sys- tem 4. Temperature Probe 5. Limit Thermostat Brewer has shut down due to mal- function (See Diagnostic Chart in manual, Page 20, or under top lid). Remove temperature probe and g[...]

  • Page 14

    Page 14 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY 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. 6. Tank Heater Disconnect the brewer from the power source. Check for con[...]

  • Page 15

    Page 15 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming (cont.) Brewer is making unusual noises 1. Lime build up on temperature probe, tank or tank heater 2. Temperature Probe 3. Control Board 1. Plumbing lines 2. Water supply 3. Lime build up Inspect probe and tank assembly for excessive lime deposits. Delime a[...]

  • Page 16

    Page 16 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT Brew cycle will not start 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. Water not touching refill probe inside tank 7. Switch panel B[...]

  • Page 17

    Page 17 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT (cont.) If the switch panel is operating prop- erly, proceed as follows. Attach a voltmeter to the terminals of the dispense solenoid. Connect the brewer to the power source. Turn on the brewer and press the BREW switch. Voltage should be present at the solenoid terminals[...]

  • Page 18

    Page 18 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT (cont.) Dripping from sprayhead Weak beverage 1. Lime build up 2. Dispense valve 1. Sprayhead 2. Water temperature 3. Filter type 4. Coffee grind 5. Funnel loading Inspect the tank assembly for ex- cessive lime deposits. Delime as required. Remove the dispense valve and c[...]

  • Page 19

    Page 19 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY BREWING CIRCUIT (cont.) Dry coffee grounds remain in the funnel Low beverage serving temperature 1. Sprayhead 2. Funnel loading 1. Warmer 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 funn[...]

  • Page 20

    Page 20 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 THINGS TO CHECK 1 Dry Plug - In Fault - Water Pressure (Is water shut "OFF"?) Sheath of temperature probe dry for 10 minutes [...]

  • Page 21

    Page 21 CA U TION : WARMERS AND SURFACES ARE HOT CAUTION D IS C A R D D E C A N T E R IF : ! BUNN MANUFACTURED BY BUNN-O-MATIC CORPORATION SPRINGFIELD, ILLINOIS, U.S.A. MODEL S/N VOLTS A.C. AMP WATTS PHASE WIRE HERTZ COVERED UNDER ONE OR MOREOF THE FOLLOWING PATENTS : ONE OR MORE OTHER PATENTS MAY BE PENDING ! CAUTION D IS CA R D D E C A N T ER I F[...]

  • Page 22

    Page 22 SERVICE (cont.) 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. Refer to the Troubleshooting guide beginning on page 10. The troubleshooting guide is divided into thr[...]

  • Page 23

    Page 23 SERVICE (cont.) 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. The troubleshooting guide is divided into thr[...]

  • Page 24

    Page 24 SERVICE (cont.) 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" from the top of the tank. 3. Connect the brewer to the power source. If the brewer [...]

  • Page 25

    Page 25 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. 3. With an ohmmeter, check for continuity across the limit thermostat terminals. If continuit[...]

  • Page 26

    Page 26 Removal and Replacement: 1. Remove the top cover or top warmer housing and front access panel as previously described. 2. Disconnect the vent hose from the top of the tank by pulling the elbow fitting from the grommet in the top of the tank lid. 3. Drain water from the tank. 4. Disconnect the water supply tube to the dispense valve from the[...]

  • Page 27

    Page 27 29707.1 082803 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. 24. Install the elbow fitting of the vent hose into the grommet in t[...]

  • Page 28

    Page 28 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. With the selector switch in the 120V position, check for continuity between the two empty terminals[...]

  • Page 29

    Page 29 SERVICE (cont.) 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. Set the "ON/OFF" switch in the "ON" upper position. 3.[...]

  • Page 30

    Page 30 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" switch in the "ON" position. Connect the brewer to the power source. The indication must be 12[...]

  • Page 31

    Page 31 29707.1 021804 P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. SOL SCHEMATIC WIRING DIAGRAM CDBC DV 29685.0004B 02/04 ©2003 BUNN-O-MATIC CORPORATION P2 P1 P1 FRONT WARMER P3 BRN/BLK VIO WHI REAR WARMER L1 BLU-14 BLU-14 "KEEP WARM" HEATER BREW STATION WARMER (CONTROLLED BY ON/OFF SW) LIMIT THERMOSTAT BRN/BLK VIO P2 P[...]

  • Page 32

    Page 32 29707.1 021804 SOL SCHEMATIC WIRING DIAGRAM CDBC APS-DV CDBCF APS/TC/LPTC-DV 29685.0005B 02/04 ©2003 BUNN-O-MATIC CORPORATION L1 BLU-14 BLU-14 "KEEP WARM" HEATER LIMIT THERMOSTAT WHI WHI WHI WHI WHI SOL REFILL DISPENSE J1-1 J1-2 J1-1 J1-5 J1-10 C O N T R O L P C B O A R D COM N.O. BLK BLK BLK-14 BLK-14 BLK-14 BLK WHI/GRN WHI/GRN [...]