Bunn CDS-2 Operating & Service Manual
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Bunn CDS-2 Operating & Service Manual

Bunn CDS-2 Operating & Service Manual

For cds-2 & 3
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POWDER
AUTO FILL
™
For CDS-2 & 3
DISCONTINUED VERSION
The information in this manual
is no longer current.
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
To obtain the Illustrated Parts Catalog, visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE,
and the quickest way to obtain the catalog. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper
copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.
www.bunnomatic.com
29793.0000D 02/07 ©1999 Bunn-O-Matic Corporation

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Summary of Contents for Bunn CDS-2

  • Page 1 To obtain the Illustrated Parts Catalog, visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the catalog. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.

  • Page 2: Initial Setup

    AS SPECIFIED HEREIN, TO 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

    17. Connect the Powder Auto-Fill power cord to the outlet located on the CDS auger motor cover. 18. Attach a flexible water line to the .25” flare fitting on the back panel of the Powder Auto-Fill. NOTE: A water strainer assembly (BUNN-O-MATIC #23820.1000) should be installed in line prior to the flexible water line.
  • Page 4 1. On the CDS control panel, make the following switch settings: a) POWER- “ON” b) DAY/NIGHT- “DAY” 2. Pull the Powder Auto-Fill fully forward on its sup- port rails and open the door. 3. Fill the Powder Auto-Fill product hopper as fol- lows: a) Pull the slide gate closed on the Powder Auto-Fill product hopper elbow and remove the hopper from...
  • Page 5 CDS auger motor cover. c) Attach a flexible water line to the .25” flare fitting on the back panel of the Powder Auto-Fill. NOTE: A water strainer assembly (BUNN-O-MATIC #23820.1000) should be installed in line prior to the flexible water line.
  • Page 6 RECOMMENDED DAILY CLEANING AND MAINTENANCE TIPS This should be done in conjunction with the recommended weekly cleaning of your CDS-2 or CDS-3 machine. Removing and cleaning the whipper chamber (once a day): 1. Open the cabinet door. 2. Pull the mixing chamber out of the whipper cham- ber.

  • Page 7: Fault List

    Door Lamp Flashes ON/OFF at 50% duty cycle Two flashes about every 2 seconds Three flashes about every 2 seconds Four flashes about every 2 seconds FAULT LIST Fault Normal operation - Powder Auto-Fill ready to dispense Low product level in Powder Auto-Fill hopper CDS/Powder Auto-Fill probe circuit open Powder Auto-Fill hopper not in place CDS refill exceeded 5 minutes...

  • Page 8: 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 person- nel.
  • Page 9 TROUBLESHOOTING (cont.) PROBLEM Product level in CDS is lower than level Probe - CDS running; Powder Auto-Fill door lamp flashes two times Product level in CDS is lower than level Probe - CDS running; Powder Auto-Fill door lamp flashes three times Product level in CDS is lower than level Probe - CDS running;...
  • Page 10 TROUBLESHOOTING (cont.) PROBLEM Powder Auto-Fill will not dispense product Dripping from dispense tip Water flows continuously PROBABLE CAUSE 1. No water 2. No power or incorrect voltage to the dispenser. 3. Dispense Solenoid Valve 4. Control Board and Probe 5. Auger Drive 6.
  • Page 11 TROUBLESHOOTING (cont.) PROBLEM Product overflows CDS hopper Weak product Dispenser is making unusual nois- Display not lit PROBABLE CAUSE 1. Control Board and Probe 2. Dispense Solenoid Valve 1. Whipper Motor 2. Frother 3. Dispense Solenoid Valve 4. Auger Drive 5.

  • Page 12: Table Of Contents

    SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.

  • Page 13: Auger Drive Components

    SERVICE (cont.) AUGER DRIVE COMPONENTS FIG. 2 AUGER DRIVE COMPONENTS Location The auger drive components are located in the bottom of the hopper assembly. Removal, Cleaning and Replacement 1. Open the dispenser door. 2. Lift the hopper assembly over the retainer plates (16) on hopper support plate (12) and slide hopper assembly out the front of the dispenser.

  • Page 14: Auger Drive Motor

    SERVICE (cont.) AUGER DRIVE MOTOR FIG. 4 AUGER MOTOR Location: The auger motor is located on the right rear of the motor assembly mounting panel. Test procedures: 1. Disconnect the dispenser from the power source. 2. Check the voltage across the positive (red wire) terminal and the negative (black wire) terminal on the auger motor with a voltmeter.

  • Page 15: Frother And Mixing/Whipper Chamber

    SERVICE (cont.) FROTHER AND MIXING/WHIPPER CHAMBER FIG. 6 FROTHER AND MIXING/WHIPPER CHAMBER Location: The frother is located behind the dispenser door, mounted on the front panel and inside the whipper chamber. Removal, Cleaning and Replacement: 1. Disconnect the dispenser from the power source. 2.

  • Page 16: Whipper Motor

    SERVICE (cont.) WHIPPER MOTOR FIG. 8 WHIPPER MOTOR Location: The whipper motor is located on the back side of the whipper motor mounting panel. Test Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the white/red and white/brown wires of the main wiring harness from the black leads of the whipper motor.
  • Page 17 SERVICE (cont.) WHIPPER MOTOR (cont.) when reconnecting wires. 13. Slide the slinger onto the motor shaft flush against the front panel. 14. Wash whipper chamber components in a mild solution of dish detergent using a bristle brush. 15. Rinse thoroughly and allow to dry before reinstalling in the dispenser.

  • Page 18: Control Board And Level Probes

    SERVICE (cont.) CONTROL BOARD and LEVEL PROBE FIG. 11 CONTROL BOARD Location: The control board is located behind the rear panel, mounted on the back side of the hopper motor mount- ing panel. Test Procedure: Liquid Level Control 1. Disconnect the dispenser from the power source. 2.
  • Page 19 SERVICE (cont.) CONTROL BOARD and LEVEL PROBE (cont.) Test Procedure: Low Product Detect 1. Disconnect the dispenser from the power source. 2. Disconnect the twelve pin connector (J1) from the control board. 3. Check the voltage across pins 2 & 3 of the twelve pin connector on the wiring harness with a voltmeter.
  • Page 20 SERVICE (cont.) CONTROL BOARD and LEVEL PROBE (cont.) Removal and Replacement: 1. Disconnect the dispenser from the power source. 2. Remove the two plugs (J1 and J7) from the main wiring harness, the potentiometer plug (J3), the photo transistor plug (J6), and the photo LED plug (J2) from the control board.

  • Page 21: Test/Service Switch

    SERVICE (cont.) TEST/SERVICE SWITCH FIG. 13 TEST/SERVICE SWITCH Location: The TEST/SERVICE switch is located on the left front of the whipper motor mounting panel. Test Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the wires from the switch terminals. 3.

  • Page 22: Main Power On/Off Switch

    SERVICE (cont.) MAIN POWER ON/OFF SWITCH FIG. 15 MAIN POWER ON/OFF SWITCH Location: The main power switch is located inside the dis- penser on the right of the whipper motor mounting panel. Test Procedure: 1. Disconnect the dispenser from the power source. 2.

  • Page 23: Lamp Cord Assembly

    SERVICE (cont.) LAMP CORD ASSEMBLY FIG. 17 LAMP CORD ASSY Location: The lamp cord assembly is located in the top of the dispenser. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Unplug the lamp cord assembly from lamp cord connector assembly.

  • Page 24: Lamp Cord Connector

    SERVICE (cont.) LAMP CORD CONNECTOR FIG. 19 LAMP CORD CONNECTOR Location: The lamp cord connector is located on top of the dispenser. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the lamp cord from the lamp cord con- nector.

  • Page 25: Lamp Holder/Socket

    SERVICE (cont.) LAMP HOLDER/SOCKET ASSEMBLY FIG. 21 LAMP HOLDER/SOCKET ASSEMBLY Location: The lamp holder/socket assembly is located inside the dispenser door. Test Procedures: 1. Disconnect the lamp cord from the lamp cord connector. 2. Remove the lamp from the lamp holder/socket as- sembly.

  • Page 26: Transformer

    SERVICE (cont.) TRANSFORMER FIG. 23 TRANSFORMER Location: The transformer is located under the hopper support panel mounted to the left of the whipper motor. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the four pin connector from the main wiring harness from the four pin connector on the transformer.

  • Page 27: Potentiometer

    SERVICE (cont.) POTENTIOMETER FIG. 24 POTENTIOMETER Location: The potentiometer is located under the hopper sup- port panel mounted to the left of the whipper motor and mounted on a bracket. Adjustments can be made by removing the 0.50” plug located on the whipper motor mounting panel.

  • Page 28: Hopper Level Indicator

    SERVICE (cont.) HOPPER LEVEL INDICATOR Photo Transistor FIG. 25 HOPPER LEVEL INDICATOR Location: The photo transistor and LED are located on the hopper side panels mounted just below the hopper guide rails. Test Procedures: Refer to the section CONTROL BOARD and LEVEL PROBE for test procedures.

  • Page 29: Hopper Switch

    SERVICE (cont.) HOPPER SWITCH FIG. 26 HOPPER SWITCH Location: The hopper switch is located under the hopper support panel. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Open the dispenser door and remove the hopper. 3. Manually engage and release the hopper switch actuator.

  • Page 30: Door Switch

    SERVICE (cont.) DOOR SWITCH FIG. 28 DOOR SWITCH Location: The door switch is located on the right side panel under the housing top cover. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the twelve pin connector (J1) from the control board.

  • Page 31: Pressure Regulator And Needle Valve

    SERVICE (cont.) PRESSURE REGULATOR and NEEDLE VALVE FIG. 30 PRESSURE REGULATOR and NEEDLE VALVE Location: The pressure regulator and needle valve are located inside the rear panel at the bottom of the dispenser. Adjustments: The water pressure regulator is preset at the factory to produce 15 psi (103 kPa) of water pressure at the regulator outlet with inlet pressures ranging from 20 psi to 90 psi (138 to 620 kPa).

  • Page 32: Dispense Solenoid

    SERVICE (cont.) DISPENSE SOLENOID VALVE FIG. 31 DISPENSE SOLENOID VALVE Location: The dispense solenoid valve is located on the left side of the dispenser base inside of the rear cover. Test Procedures: 1. Disconnect the dispenser from the power source. 2.

  • Page 33: Wiring Diagrams

    WIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM PAF MAIN POWER SWITCH HOPPER MOTOR DOOR LAMP BLK-22 RED-22 TEST/SERVICE SWITCH WHI/ORN SERVICE BLU/BLK TEST HOPPER SWITCH RED/BLK DOOR SWITCH WHI/BLK WHI/GRN 120V : 24V AC TRANSFORMER WHI/GRN WHI/RED WHI/BLK WHI/BRN WHI/ORN RED/BLK BLU/BLK MOTOR SPEED ADJUST 120 VOLTS AC - 2 WIRE...
  • Page 34 WIRING DIAGRAMS MAIN POWER SWITCH HOPPER MOTOR DOOR LAMP BLK-22 RED-22 TEST/SERVICE SWITCH WHI/ORN SERVICE BLU/BLK TEST HOPPER SWITCH RED/BLK DOOR SWITCH SCHEMATIC WIRING DIAGRAM PAFA WHI/BLK WHI/GRN 230V : 24V AC TRANSFORMER WHI/GRN WHI/BLK J2 WHI WHI/ORN RED/BLK BLU/BLK MOTOR SPEED ADJUST 230 VOLTS AC - 2 WIRE...

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Cds-3Powder auto fill

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