Bunn FMD-4 user manual

User manual for the device Bunn FMD-4

Device: Bunn FMD-4
Category: Beverage Dispenser
Manufacturer: Bunn
Size: 6.23 MB
Added : 4/7/2013
Number of pages: 71
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Abstracts of contents
Summary of the content on the page No. 1

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

Summary of the content on the page No. 2

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

Summary of the content on the page No. 3

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 .............................................................................................................................

Summary of the content on the page No. 4

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

Summary of the content on the page No. 5

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

Summary of the content on the page No. 6

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

Summary of the content on the page No. 7

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

Summary of the content on the page No. 8

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

Summary of the content on the page No. 9

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

Summary of the content on the page No. 10

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

Summary of the content on the page No. 11

NOTES 42672 122209 11

Summary of the content on the page No. 12

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

Summary of the content on the page No. 13

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

Summary of the content on the page No. 14

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

Summary of the content on the page No. 15

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

Summary of the content on the page No. 16

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

Summary of the content on the page No. 17

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

Summary of the content on the page No. 18

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

Summary of the content on the page No. 19

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

Summary of the content on the page No. 20

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


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