Bunn FMD-3 Operating & Service Manual

Bunn fmd-3: user guide

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Installation and operating manual (9 pages)

Service & repair manual (71 pages)

Operating & service manual (36 pages)

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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 SOLE OPTION 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 DAMAGE, FIRE, OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL BEFORE BUYING OR USING THIS PRODUCT THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00831.0000F 3/98 ©1998 BUNN-O-MATIC CORPORATION 00831.0000 MECHANICAL THERMOSTAT 28368.0000 INTRODUCTION This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc.
Page 4 INITIAL SET-UP 1. Locate the drip tray assembly above the dispenser nested in the packing material. 2. Remove the drip tray and the drip tray cover and set them aside. 3. Remove the water strainer assembly from the drip tray and set it aside. 4.
Page 5 Bunn-O-Matic does not recommend the use of a saddle valve to install the dispenser. The size and shape of the hole made in the supply line by this type of device may restrict water flow.
Page 6 INITIAL FILL & HEAT CAUTION - The dispenser must be disconnected from the power source throughout the initial fill & heat, except when specified in the instructions. 1. Turn on the water supply and connect the dispenser to the power source. 2.
Page 7 Refer to the decal inside the hopper access door for cleaning recommendations and procedures. The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all sur- faces on Bunn-O-Matic equipment. ADjUSTMENTS The hot or cold beverage solenoids are preset to dispense approximately can be adjusted: 1.
Page 8 NOTE - The dispenser must be refilled using the INITIAL FILL & HEAT steps before reconnecting to the power source. 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.) PROBLEM Product will not dispense PROBABLE CAUSE 1. No water 2. No power or incorrect voltage to the dispenser 3. Dispense Switch 4. Dispense Solenoid Valve (Hot or Cold) 5. Solenoid Valve (Inlet) 6. Control Board 7. Overflow Protection Switch 8.
Page 10 TROUBLESHOOTING (cont.) PROBLEM Product will not dispense (cont.) Water is not hot Spitting or excessive steaming PROBABLE CAUSE 9. Water Strainer 10. Lime build-up CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water condi- tions.
Page 11 TROUBLESHOOTING (cont.) PROBLEM Dripping from dispense tip Water flows into tank continuously Product overflows container PROBABLE CAUSE 1. Lime build-up CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water condi- tions. Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in seri- ous leaks.
Page 12 TROUBLESHOOTING (cont.) PROBLEM Weak product PROBABLE CAUSE 1. Water temperature 2. Whipper Motor 3. Frother 4. Dispense Solenoid Valve (Hot or Cold) 5. Auger Drive 6. Auger Spring 7. Auger Motor 8. Rinse/Run Switch 9. Rinse Timer REMEDY Place an empty container beneath the dispense tip.
Page 13 TROUBLESHOOTING (CONT.) PROBLEM Dispenser is making unusual noises Excess dust Display not lit PROBABLE CAUSE 1. Plumbing Lines 2. Water Supply 3. Tank Heater 1. Fan 2.Control Board 1. Lamp 2. Lamp Holder 3. Starter - Lamp 4. Ballast REMEDY Plumbing lines should not be resting on the counter top.
Page 14: 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 electri- cal equipment should be performed only by qualified service personnel.
Page 15 SERVICE AUGER DRIVE COMPONENTS (CONT.) If voltage is present as described, proceed to #5. If voltage is not present as described, refer to the Wiring Diagrams and check the dispenser wiring harness. 5. With the wires removed from the motor to be tested.
Page 16 SERVICE AUGER DRIVE COMPONENTS (CONT.) 14. Install hopper assy (20) in the dispenser by sliding hopper assy in the guides on the hopper support plate (19) until the slot in the bottom rear the hop- per seats against the shoulder screw (18) in the hopper support plate.
Page 17: Auger Motor
SERVICE (cont.) AUGER DRIVE COMPONENTS (cont.) Auger Drive Motor (Refer to Fig. 2 & 3): 1. Remove all hopper assemblies (20,17) and set aside for reassembly. 2. Remove the four #8-32 screws securing the hopper support plate (19,16), remove plate and set aside for reassembly.
Page 18: Ballast
SERVICE (cont.) BALLAST FIG. 5 BALLAST Location: The front door lamp ballast is located behind the front access panel on the left side of the component bracket. Test Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the two black leads on the ballast from the door interconnect harness and the dispenser main harness.
Page 19: Control Board
SERVICE (cont.) CONTROL BOARD FIG. 7 CONTROL BOARD Location: The Control Board is located behind the lower front access cover mounted on the component bracket. Test Procedure: Liquid Level Control Circuitry: 1. Disconnect the dispenser from the power source. 2. Disconnect the six pin connector from J3 of the control board.
Page 20 SERVICE (cont.) CONTROL BOARD (cont.) 17. Gently pull the liquid level probe out of the tank lid and inspect for corrosion. Replace it if necessary. 18. Place the probe so that neither end is in contact with any metal surface of the dispenser. 19.
Page 21: Control Thermostat
SERVICE (cont.) CONTROL THERMOSTAT FIG. 9 CONTROL THERMOSTAT Location: The control thermostat (mechanical or electronic) is located inside the dispenser on the upper left side of the housing. Test Procedure: Mechanical Thermostat: 1. Disconnect the dispenser from the power source. 2.
Page 22 SERVICE (cont.) CONTROL THERMOSTAT (cont.) BLK from Limit Thermostat BLK from Tank Heater Switch MECHANICAL THERMOSTAT BLK to Main Wiring Harness FIG. 10 THERMOSTAT TERMINALS TAN to WHI/BRN in Main Wiring Harness BLK to Main Wiring Harness WHI to Main Wiring Harness ELECTRONIC THERMOSTAT P1448...
Page 23: Dispense Switch
SERVICE (cont.) DISPENSE SWITCH FIG.11 DISPENSE SWITCH Location: The dispense switches are located on the lower outside of the dispenser door. Test Procedure: 1. Disconnect the dispenser from the power source. 2. Open the dispenser door and remove the bottom door cover.
Page 24: Fan
SERVICE (cont.) FIG. 13 FAN Location: The fan is located inside the dispenser housing on the right rear of the dispenser base plate. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the black and white wires from the fan terminals.
Page 25: Frother
SERVICE (cont.) FROTHER AND WHIPPER MOTOR FIG. 15 FROTHER AND WHIPPER MOTOR Location: The frothers are located behind the dispenser door, mounted on the whipper motor shaft inside the whipper chamber. The whipper motors are located on the back side of the whipper motor mounting panel.
Page 26: Whipper Motor
SERVICE (cont.) FROTHER AND WHIPPER MOTOR (cont.) 6. Pull the mixing chamber (2) out of the whipper chamber (4). 7. Remove the two #4-40 screws securing the fan baffle(13) to the whipper motor mouting panel and remove fan baffle. Set aside for reassembly. 8.
Page 27: Hot/Cold Switch
SERVICE (cont.) HOT/COLD SWITCH (Optional) FIG. 18 HOT/COLD SWITCH Location: The hot/cold switch is located on the left side of the whipper motor mounting panel. Test Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the four pin plug from the hot/cold switch and the four pin connector on the main wiring harness.
Page 28: Increase/Decrease Switch
SERVICE (cont.) INCREASE/DECREASE SWITCH FIG. 20 INCREASE/DECREASE SWITCH Location: The increase/decrease switch is located on the lower 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 29: Lamp Holder
SERVICE (cont.) LAMP HOLDER FIG. 22 LAMP HOLDERS Door Assy Upper Panel Lamp Holders Lower Panel Lamp Starter W/Socket Location: The lamp holders are located on the front of the upper panel behind the display panel. Test Procedure: 1. Disconnect the dispenser from the power source. 2.
Page 30: Lamp Starter And Socket
SERVICE (cont.) LAMP STARTER and SOCkET Location: The lamp starter (6) is located inside the door assy (1) on the top of the door lower panel (5). Test Procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the starter leads from the door wiring harness.
Page 31: Limit Thermostat
SERVICE (cont.) LIMIT THERMOSTAT FIG. 23 LIMIT THERMOSTAT Location: The limit thermostat is located in the center of the tank lid. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect both black wires from the limit ther- mostat.
Page 32: Overflow Protection Switch
SERVICE (cont.) OVERFLOW PROTECTION SWITCH FIG. 25 OVERFLOW PROTECTION SWITCH Location: The overflow protection switch is located inside the copper overflow cup on the left side of the tank. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Remove the wire nuts connecting the red wires from the overflow protection switch to the black wire and blue wire from the main harness.
Page 33: Rinse/Run Switch
SERVICE (cont.) RINSE /RUN SWITCH FIG. 27 RINSE/RUN SWITCH Location: The rinse/run switch is located on the lower right side of the whipper motor mounting panel. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Check for continuity between the center left ter- minal and left bottom terminal, also between the center right terminal and the right bottom terminal with the switch in the rinse (upper) position.
Page 34: Solenoid (Cold Drink - Optional)
SERVICE (cont.) SOLENOID VALVE (COLD WATER - OPTIONAL) FIG. 29 COLD WATER SOLENOID VALVE Location: The cold water solenoid valve is located on the left side of the dispenser base just behind the component bracket. Test Procedures: 1. Disconnect the dispenser from the power source. 2.
Page 35: Solenoid (Dispense)
SERVICE (cont.) SOLENOID VALVES (DISPENSE) FIG. 31 DISPENSE SOLENOID VALVES Location: The dispense solenoids are located on the upper left side of the tank. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the white and white/violet, orange or tan wires from the solenoid valve.
Page 36: Solenoid (Inlet)
SERVICE (cont.) SOLENOID VALVE (INLET) FIG. 33 INLET SOLENOID VALVE Location: The inlet solenoid is located inside on the left rear of the dispenser housing. Test Procedures: 1. Disconnect the dispenser source. 2. Disconnect the white and violet wires from the solenoid valve.
Page 37: Tank Heater
SERVICE (cont.) TANk HEATER FIG. 35 TANK HEATER Location: The tank heater is located inside the tank and se- cured to the tank lid. Test Procedure: 1. Disconnect the dispenser from the power source. 2. With a voltmeter, check the voltage across the black and white wires 120 volt or 240 volt models or black and red wires for 120/208 volt models or 120/240 volt models.
Page 38 SERVICE (cont.) TANk HEATER (cont.) WHI or RED to Main Wiring Harness FIG. 36 TANK HEATER TERMINALS BLK to Limit Thermostat P1218 29170 080900...
Page 39: Tank Heater Switch
SERVICE (cont.) TANk HEATER SWITCH FIG. 37 TANK HEATER SWITCH Location: The tank heater switch is located inside the dis- penser on the upper right of the whipper motor mount- ing panel. Test Procedure: 1. Disconnect the dispenser from the power source. 2.
Page 40: Transformer
SERVICE (cont.) TRANSFORMER FIG. 39 TRANSFORMER Location: The transformer is located behind the lower front access cover, mounted on the right rear side of the component bracket. Test Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the four pin plug from the main harness from the four pin connector on the transformer.
Page 41: Wiring Diagrams
29170 091598...
Page 42 29170 080900...

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