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                        FMD Series
Including: FMD-1,2,3,4,5
SERVICE & REPAIR MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601    FAX: (217) 529-6644
      
42672.0000B  06/12   ©2009 Bunn-O-Matic Corporation                                                                                                                                                                                                                                                                  
                    
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                        BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY (Excluding regular maintenance items) Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCP/MCA pod brewers thermal servers  and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor.  2) All other equipment -  2 years parts and 1 year labor plus added warranties as specified below:  a) Electronic circuit and/or control boards
                    
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                        INTRODUCTION Safety first! To avoid electrical shock, unplug dispenser from power source before servicing inside. Basic Maintenance In order to maintain proper machine operation, a Preventative Maintenance schedule must be performed on a  regular basis. The following procedures pretain to all versions in the FMD family of machines unless otherwise noted. CONTENTS Warranty .............................................................................................................................
                    
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                        CLEANING 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. Do NOT clean this equipment with a water jet device. 1 x 24h    1. Rinse out Whipper Chambers by placing RINSE/RUN  1. Para limpiar las camaras de mezcla, coloque el interruptor en la  switch in the "RINSE" position and activating DISPENSE posicón ENJUAGUE/MARCHA (”RINSE/RUN”) y pulse el boton  switches.  para espumar y distribuir la bebida (”D
                    
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                        REQUIRED REGULAR MAINTENANCE: When performing Daily-Weekly Cleaning procedures, inspect o-rings, seals, and bushings for signs of wear or  damage and replace immediately. Check and/or replace every 6 months or as required:  32906.0000 Mixing Chamber Kit (Includes items indented below)   25732.0000  Steam Collector   25733.0000  Mixing Chamber   25734.0000  Whipper Chamber   25736.0000  Dispense Tip   24733.0010  O-ring   25902.0000  Frother   26356.0000  Shaft Seal   28866.0000  Receptacle   259
                    
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                        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	 per formed	 only	 by	 qualified	 ser vice	 person- nel. •	 All	 electronic	 components	 have	 high	 voltage	 ac	 and	 low	 voltage	 dc	 potential	 on	 their	 termin
                    
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                        TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Product will not dispense (cont.)  7. Level Control Board and Probe - Refer to Service - Level Control Board  FMD-1 and Probe for testing procedures.  See page 41 8. Control Board Refer to Service - Control Board and  Probe for testing procedures. See  page 20 9. Overflow Protection Switch Refer to Service  - Overflow Protec- tion Switch. See page 44 10. Auger Drive  Refer to Service  - Auger Drive. See  page 14 11. Water Strainer (A) Directi
                    
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                        TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water is not hot (Cont.) 4. Tank Heater Switch Refer to Service - Tank Heater Switch  for testing procedures. See page  52 5. Heater Relay Refer to Service - Heater Relay for  testing procedures. See page 51 6. Control Board Refer to Service - Control Board for  testing procedures. See page 20 Spitting or excessive steaming 1. Lime build-up Inspect the tank assembly for ex- CAUTION - Tank and tank compo- cessive lime deposits. Delime as  nent
                    
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                        TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water flows into tank continuously 3. Overflow Protection Switch Refer to Service  - Overflow Protec-      (Cont.) tion Switch. See page 44  4. Digital Touch Control Switch Refer to Service - Digital Touch Con- trol Switch for testing procedures.  See page 29 Weak product 1. Water Temperature Place an empty container beneath the  dispense tip. Initiate a dispense cycle  and check the water temperature  immediately below the dispense tip  with
                    
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                        TROUBLESHOOTING (CONT.) PROBLEM PROBABLE CAUSE REMEDY Product overflows container 1. Dispense Switch Refer to Service -  Dispense Switch for  testing procedures. See page 28 2. Dispense Solenoid Valve Remove the solenoid valve and clear  any obstructions. Rebuild or replace  the valve if necessary. See page 47  Dispenser is making unusual 1. Plumbing Lines Plumbing lines should not be resting  noises on the counter top. 2. Water Supply (A) The dispenser must be connected  to a cold water line (B
                    
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                        NOTES 42672 122209 11                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
                    
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                        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. The dispenser should be disconnected from the power source when servicing, except when electrical  tests are required and the test procedure spec
                    
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                        SERVICE(CONT.) ACCESS PANELS Location:  All access panels are similar through the whole FMD family (FMD-5 shown). Before removing panels, make  sure power is OFF to the machine and water is disconnected accept where indicated in testing procedures. Retain  all screws and other attaching hardware for re-assembly. FMD-5 shown FIG. 1 ACCESS PANELS 42672 122209 13 PLACE CUP HERE                                                                                                                           
                    
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                        SERVICE (CONT.) If voltage is present as described, proceed to #5. If voltage is not present as described, refer to the wiring  AUGER DRIVE COMPONENTS (all Models) diagram and check the dispenser wiring harness. FMD-4 shown 5. Check the voltage across the positive (red wire)  terminal and the negative (black wire) terminal on  the auger motor with a voltmeter. With the rinse/ run switch in the run (lower) position press and  hold the dispense switch. Connect the dispenser  to the power supply. A
                    
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                        SERVICE (CONT.) Auger Drive  Motor (Refer to Fig. 2) AUGER DRIVE COMPONENTS 1. Remove hopper assy (15), and set aside for reas- FMD-4 shown sembly. 2. Remove the four #8-32 screws securing the hopper  1 support plate (11), remove plate and set aside for  reassembly. 2 3. Remove the four #8-32 screws, located inside the  dispenser housing on the lower right front of the  auger motor mounting panel (19), securing auger  3 motor mounting bracket (16) and auger motor  4 (17) to the rear of the auger
                    
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                        SERVICE (CONT.) AUGER DRIVE COMPONENTS FMD-5 shown Removal, Cleaning and Replacement 1 Hopper & Auger (all other hoppers) 2 1. Open the dispenser door and raise the top front  cover. 4 2. Lift the front edge of hopper assy (20) over the  tab on hopper support plate (19) and slide hopper  3 5 assembly out the front of the dispenser. 8 3. Remove hopper lid (1) and empty product. 4. Pull off the ejector elbow (13). 5. Remove agitator disc assy (2) by pulling agitator  7 support rod (4) towards agit
                    
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                        SERVICE (CONT.) AUXILLARY CONTROL BOARD (FMD DBC-3 only) 4. Back probe check the voltage across pins 2 (black  wire) and 5 (white wire) of the six pin J2 connector  on the wiring harness with a voltmeter. Connect the  dispenser to the power source. The indication must  be:  a) 120 volts ac for two wire 120 volt models  b) 120 volts ac for  three wire 120/208 or 120/240  volt models   c) 240 volts ac for two wire 240 volt models.  d) 230 volts ac for two wire 230 volt models. 5. Disconnect the di
                    
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                        SERVICE (CONT.) AUXILLARY CONTROL BOARD (CONT.) Removal and Replacement: 4. On the dispenser whipper panel, ensure that the tank  1. Loosen the two #8-32 screws securing the compo- heater switch is in the “ON” (lower) position. nent mounting bracket to the dispenser housing. 5. Disconnect the black wire coming from the control  2. Slide the component mounting bracket forward until  thermostat from the limit thermostat. the screw heads align with the large diameters of  6. Remove the control ther
                    
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                        SERVICE (cont.) BALLAST (all Models) FMD-4 shown Removal and Replacement 1. Loosen the three #8-32 screws securing the com- ponent bracket to the dispenser housing base. 2. Pull component bracket out the front of the dis-  penser far enough so the leads on each ballast can  be disconnected from the main wiring harness and  the door interconnect harness. 3. Remove the two #8-32 screws securing each ballast  to the rear of the component bracket.  4. Remove and discard the ballast. 5.  Install new 
                    
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                        SERVICE (cont.) CONTROL BOARD (FMD-2,-2FD,DBC-2FD,DBC-3) 4. With a voltmeter, back probe check the voltage  FMD DBC-3 shown across pins 2 & 4 of  the six pin J2 connector on  the wiring harness. Connect the dispenser to the  power source. The indication must be:  a) 120 volts ac for two wire 120 volt models  b) 120 volts ac for  three wire 120/208 volt models  or  three wire 120/240 volt models   c) 240 volts ac for two wire 240 volt models.  d) 230 volts ac for two wire 230 volt models. 5.  Dis