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Bunn TU3QF-EZ Operating & Service Manual

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BUNN
®
TU3QF-EZ
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is no longer current.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
www.bunnomatic.com
33030.0000F 8/01 © 2000 Bunn-O-Matic Corporation

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  • Page 1 BUNN ® TU3QF-EZ DISCONTINUED VERSION The information in this manual is no longer current.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 www.bunnomatic.com 33030.0000F 8/01 © 2000 Bunn-O-Matic Corporation...

  • Page 2: Table Of Contents

    SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, 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

    USER NOTICES Carefully read and follow all notices on the equipment and in this manual. They were written for your protec- tion. All notices on the equipment should be kept in good condition. Replace any unreadable or damaged labels. #00831.0000 #00656.0000 #03408.0000 #03409.0000...

  • Page 4: Electrical Requirements

    " water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer to clean the countertop. 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 5: Initial Set-Up

    INITIAL SET-UP CAUTION - The brewer must be disconnected from the power source throughout the Initial Set-up , except when specified in the instructions. 1. Insert an empty funnel into the funnel rails. 2. Place an empty container of at least 4 gallons capacity under the funnel. 3.

  • Page 6: Cleaning

    CLEANING CAUTION - CLEAN AND SANITIZE YOUR ICED TEA BREWER DAILY 1. Remove and thoroughly clean the entire brew funnel. The funnel tip and screen must be free from any tea particles or residue. Reassemble the funnel. 2. Place the ON/OFF switch in the "OFF" position. Remove and thoroughly rinse the sprayhead. The holes must be open and clear of any mineral deposits.

  • Page 7: Adjustments And Optional Settings

    TU3QF-EZ ADJUSTMENTS & OPTIONAL SETTINGS P1864 P2174 ADJUSTING BREW VOLUMES IMPORTANT - Tank must be full and refill solenoid shut off prior to making these adjustments. Sprayhead must be installed while making these adjustments. INCREASING THE BREW VOLUME: Use the following steps when you want to increase the amount of water for each brew cycle.

  • Page 8: Troubleshooting

    3 gallons. 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. •...
  • Page 9 TROUBLESHOOTING (cont.) BREWING CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Brew or sanitize cycle will not start 1. Ready light flashing Brewer has shut down due to malfunction (See Diagnostic Chart in manual, page 14, or under top lid of brewer). 2. No water Water lines and valves to the brewer must be open.
  • Page 10 TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Consistently low beverage level in 1. Brew volume Set up brewer according to instruc- the dispenser or beverage over- tions in section Adjustments -Brew flows dispenser Volumes. (See page 7) Using a stop watch or second hand, time the length of the brew cycle.
  • Page 11 TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Dripping from sprayhead 1. Lime build up Inspect the tank assembly for ex- cessive lime deposits. Delime as re- quired. 2. Brew Solenoid Valve Refer to Service - Brew Solenoid Valve for testing procedures. See page 16 Weak beverage 1.
  • Page 12 TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Water does not heat to proper 1. Ready light flashing Brewer has shut down due to temperature malfunction (See Diagnostic Chart in manual, page 14, or under top IMPORTANT: Make sure no tem- lid).
  • Page 13 TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming 1. Lime build up on temperature Inspect probe and tank assembly probe, tank or tank heater for excessive lime deposits. Delime as required. 2. Temperature Probe Remove the probe from the grom- met and submerge in a water bath of approximately 70°F.
  • Page 14 DIAGNOSTICS Intermittent flashing of the READY indicator 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 Reserved for future use. Low Tank Level Fault - Water pressure Level probe dry too long after fill valve is energized Level probe wiring...

  • Page 15: 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 16: Brew Solenoid Valve

    SERVICE (cont.) 6. Check the solenoid valve for coil action. Connect BREW SOLENOID VALVE the brewer to the power source. With ON/OFF switch in the "ON" upper position press start switch and listen carefully in the vicinity of the solenoid valve for a "clicking"...

  • Page 17: Cold Water Solenoid Valve (For Faucet)

    SERVICE (cont.) 6. Check the solenoid valve for coil action. Connect the brewer to the power source. When pressing COLD WATER SOLENOID VALVE (for faucet) the faucet switch in the Green Tea position listen carefully in the vicinity of the solenoid valve for a "clicking"...

  • Page 18: Faucet Switch

    SERVICE (cont.) If continuity is present as described, the switch is FAUCET SWITCH operating properly. If continuity is not present as described, replace the switch. Removal and Replacement: 1. Remove the wires from the switch terminals. 2. Compress the clips inside the hood and gently push the switch through the opening.

  • Page 19: Hot Water Solenoid Valve (For Faucet)

    SERVICE (cont.) 6. Connect the voltmeter lead ends to the hot water HOT WATER SOLENOID VALVE (for faucet) dispense valve coil terminals. Connect the brewer to the power source. Place "ON/OFF" Switch in the "ON" position. Press and hold the Black Tea faucet switch.

  • Page 20: Limit Thermostat

    SERVICE (cont.) 5. Check the voltage across the exposed terminal of LIMIT THERMOSTAT the limit thermostat and the white wire on the tank heater with a voltmeter. Connect the brewer to the power source. The indication must be 120 volts 6.

  • Page 21: On/Off Switch

    SERVICE (cont.) ON/OFF SWITCH 6. Check for continuity across the center and end terminals of the bottom row when the switch is in the “ON” position. If continuity is present as described, replace the wires, the switch is operating properly. If continuity is not present as described, replace the switch.

  • Page 22: Sanitize Switch

    SERVICE (cont.) If continuity is present as described, the switch is SANITIZE SWITCH operating properly. If continuity is not present as described, replace the switch. Removal and Replacement: 1. Remove the wires from the switch terminals. 2. Compress the clips inside the hood and gently push the switch through the opening.

  • Page 23: Start Switch

    SERVICE (cont.) START SWITCH Removal and Replacement: 1. Remove the wires from the switch terminals. 2. Compress the clips inside the hood and gently push the switch through the opening. 3. Push the new switch into the opening and spread the clips to hold the switch captive in the hood.

  • Page 24: Tank Heater

    SERVICE (cont.) TANK HEATER If continuity is present as described, reconnect the wires, the tank heater is operating properly. If continuity is not present as described, replace the tank heater. NOTE- If the tank heater remains unable to heat, re- move and inspect heater for cracks in the sheath.

  • Page 25: Control Board

    SERVICE (cont.) Control Board 4. Disconnect the 2-pin connector (J-7) from the ready indicator LED. 5. Remove the four #6-32 screws securing the con- trol board to the component mounting bracket. 6. Remove the four spacers from the old control board and attach them to the new control board.

  • Page 26: Wiring Schematics

    SCHEMATIC WIRING DIAGRAM TU3QF-EZ LIMIT THERMOSTAT TANK HEATER BLU-14 BLK-14 WHI-14 KEEP WARM HEATER BLK-14 WHI/VIO RELAY TRM-1 TRM-2 BLU-14 BLK-14 N.O. FAUCET J1-1 (COLD WATER MIX) WHI/BLU WHI/GRN BREW WHI/RED J1-8 ON/OFF WHI/YEL J5-1 SWITCH WHI/ORA J5-6 WHI/RED J7-1...

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