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49179.0000

1. 53 1 1 1 sr 1 HOLIMS asus p n i al TONES sur i 04 08 10414102 1 HOLMS 1 35434610 i H Issamu 1 Hole SOtpyAS ROIEYOAW tu i ae Roe a ES EN MOISINEHL punoi MOLSINMHL Y INGO aa 0 META 9 me 3 4 TIBI B 1 1 180 p d M E BA RN OINIHI asndsia 29184510 HOLIMS 1 94 1103001 31038 N MEIN HOW 1m 3SNZASIO 0 NUON REN 9 BA NUON v On aT m xum E 0 i cad EI d NEO 038 EN 3SNZ SIO 5 34510 INWA HOI HOLMS ET NOLVH39I43H Sino im y HOSNZONOO lo E E E eH THM m uc lw E Y esum i Tm ls lo 8v 8v Nu mci Davos yy d 1 i 1 1 1 1 i 1 1 00 1 5120007 MeZ NL ELECTRICAL SCHEMATIC DIAGRAM for JDF 4S Models with LED Lited Doors 120V 220 230V MODELS Lin SCHEMATIC WIRING DIAGRAM JDF 4S GRN 2 z ini z GRN YEL COMPRESSOR ASSY BLU BLK GRN YEL 16 BLU BLK jj RED BLK STATION 1 STATION 2 DISPENSE DISPENSE GAN RED O RED ORN STATION 1 STATION 2 T CABINET DISPENSE DISPENSE were
2. FIG 65 TEMPERATURE PROBE Location The temperature probe is located on the top of the tank assembly Test Procedure 1 Disconnect the dispenser from the power source 2 Remove the top rear cover 3 With a voltmeter back probe the connector from the temperature probe 4 Connect the dispenser to the power source 5 Seethe chart for voltage readings 6 For continuity check disconnect the dispenser from the power source 7 Disconnect the two pin connector from the dis penser main wiring harness 8 With an ohmmeter check for continuity across the pins for the black and white wires 9 See the chart for resistance voltage readings Al ternate check Leave two pin connector plugged in place dc voltmeter across two pin connector in parallel check voltage with dispenser running 10 Verify wiring to probe 11 If readings are not present as described replace the temperature probe NOTE Some meters have difficulty measuring a sen sor either rapidly rising or falling in temperature JDF S Bath Thermistor Calibration Recalibration of the bath thermistor should be con ducted anytime the main circuit board or the bath thermistor is being replaced Recalibration procedure Step 1 Remove the front splash panel so you can see the LED s on the main circuit board Step 2 Place the Program switch in the On posi tion For early models without the program sw
3. FIG 57 RELAY Location The relay or contactor is located inside the dis penser chassis on the lower outside of the component bracket Test Procedures 1 Disconnect the dispenser from the power source 2 Withavoltmeter checkthe voltage across the white wire and the white black wire Connectthe dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 3 Disconnect the dispenser from the power source If voltage is present as described proceed to 74 If voltage is not present as described refer to the Wir ing Diagram and check the dispenser wiring harness If harness has continuity replace Control Board 4 Disconnect the blue black wire and the red black wires from relay terminals 4 and 6 5 Connect the dispenser to the power source 6 Turn on power and check for continuity across terminals on relay If continuity is present as described disconnect the dispenser from power source and reconnect wires to terminals 4 and 6 the relay is working If continuity is not present as described do the same continuity test across terminals 2 and 8 If continu ity is present between terminals Z2 and 78 reconnect wires to terminals Z4 and 6 instead of 2 and 78 If continuity is not present as described replace the relay Removal and Replacement 1 Disconnect the wires from the relay 2 Remove the two 78
4. SS3NHVH s TRI a E HOLIMS 1109901 25184910 THM E 1 XR p 6 HOLIMS H 100001 EX EI HOLIMS asnasa te 1 NOUVIS 3643450 5011 3943450 ENOLIVIS sir 3943450 P NOUVIS HOIIMS 39434501 0109 MOLSIWUSHL WOJSIWESHL I3NI8V2 punog 918349 omoara 3SVHd 319NIS Z IV SLIOA 062 10 JV SLIOA 021 Quvo8 1041402 AuvTiiXnv 1 ila ol 1 somis SOLO MS eueiquiew qi SIPON TH TIR mu Tan 3sN3dsia vNOUVIS 3sN3dsia ENOLIVIS DIVA NWT gt UAM 180 3sNadsia P NOVIS 3sNidsia zNOUvIS NHO IHM B on uy asnadsia ENOLIVIS 3sN3dsia 1 NOUVIS 190 034 asnadsia ZNOLLWIS asnadsia 1 NOUVIS NW m E Y UA Sigo Iro HOSNZONOD ES gt THM donum SSA 49179 110613 55 ELECTRICAL SCHEMATIC D
5. COLD WATER DISPENSE FIG 48 MEMBRANE SWITCH 49179 110613 SERVICE CONT EMI Filter all Models JDF 4S shown FIG 49 EMI FILTER Location The EMI Filter is located on the electrical component mounting bracket on the lower front of the dispenser behind the splash panel Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnectthe two black wires and two white wires on the EMI Filter from the power cord and the main wiring harness 3 Check for resistance between the two black leads on the EMI Filter If resistance is present as described the EMI Filter is operating properly If resistance is not present as described replace the EMI Filter Removal and Replacement 1 Disconnect the wires from the EMI Filter 2 Remove the two 78 32 screws and nuts securing the EMI Filter 3 Remove and discard EMI Filter 4 Install new EMI Filter using two 78 32 screws and nuts to secure EMI Filter to its former location 5 Referto Fig 50 when reconnecting the wires 118 0 118 5 KQ Across either pair FIG 50 EMI FILTER CONNECTORS 49179 110613 SERVICE CONT Lamps Holders and Ballast s Early Models FIG 51 LAMPS amp HOLDERS Location Thelamps and lamp holders are located on the door light panel behind the door cover T
6. P1219 FIG 20 COMPRESSOR SWITCH TERMINALS 49179 110613 SERVICE CONT Condenser Fan all Models JDF 4S shown P1684 40 FIG 21 CONDENSER FAN Location The condenser fan is located inside the main frame below the compressor assembly Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnectthe2 pinfromthefantothe main wiring harness 3 Check for continuity across the fan terminals If continuity is present as described reconnect the wires to the fan terminals If continuity is not present as described replace the fan Removal and Replacement 1 Disconnect the dispenser from the power source 2 Removethefour screws attaching the fan and cover assembly to the refrigeration cabinet Gently pull the cover assembly forward and discon nect the 2 pin connector from the fan to the main harness 4 Remove the fan from the cover assembly and dis card 5 Install the new fan onto the cover assembly 6 Reconnect the wiring harness to the new fan 7 Install fan and cover assembly using four screws previously removed 8 Reconnect power to the dispenser BLU BLK WHI FIG 22 CONDENSER FAN TERMINALS 49179 110613 SERVICE CONT Control Board Main all Models JDF 4S shown P3250 25 FIG 23 CONTROL BOARD Location
7. TROUBLESHOOTING Continued PROBLEM Unit is not working Difficulty brixing and or weak bever age Difficulty brixing and or weak bever age Difficulty brixing bag in box PROBABLE CAUSE 1 Step down transformer 2 Main control board 1 Product viscosity or too cold 2 Low water pressure 3 High water pressure 4 Dispense valve adjustment set ting 5 Brix ratio 1 Pump tubing 2 Use of portable water pump Vacuum leak REMEDY Check for 120 24 or 230 24 vac If no 24vac reading replace step down transformer If 24 vac present and no LED s lit replace control board Thorough thaw of product before use 35 40 Maintain 20 psi or higher and a mini mum flow rate of 1 fl oz sec Over 100 psi install a pressure regu lator and set to 50 psi A Perform 3 second water dispense test Factory setting is 1 0 oz sec Acceptable water flow rate is 0 8 to 1 5 oz sec depending on the mix ratio 4 1 B Adjust water to proper mix ratio Once water is set adjust motor speed to achieve brix 96 Check for proper brix ratio per prod uct using Total Dispense method and or refractometer method Inspect clean or replace tubing and pump rotor rollers for ease of rotation A Follow plumbing requirements for pressure and flow rate B Source another portable pump or water supply that meets require ments Inspect all lines and connections from bag in box connecto
8. U N NP JDF 28 45 JDF 4D JDF 4SB Y 7 g sa ss SERVICE amp REPAIR MANUAL BUNN O MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 WWW bunn com To ensure you have the latest revision of the Operating Manual or to view the Illustrated Parts Catalog Programming Manual or Service Manual please visit the Bunn O Matic website at www bunn com This is absolutely FREE and the quickest way to obtain the latest catalog and manual updates For Technical Service contact Bunn O Matic Corporation at 1 800 286 6070 X 49179 0000D 05 14 2013 Bunn 0 Matic Corporation BUNN 0 MATIC COMMERCIAL PRODUCT WARRANTY Bunn O Matic Corp BUNN warrants equipment manufactured by it as follows 1 Airpots thermal carafes decanters GPR servers iced tea coffee dispensers MCR MCP MCA single cup brewers ther mal 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 8 Electronic circuit and or control boards parts and labor for 3 years b Compressors on refrigeration equipment 5 years parts and 1 year labor c Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis
9. THERMISTOR 2 YEL of C 0 1 N T WATER BATH 1 THERMISTOR STATION 3 STATION 4 1 5 i DISPENSE DISPENSE L RED RED O ORN P n b 1 1 B 11 Models with Mechanical Switches COLD WATER WHIVIO TAN DISPENSE a V R a al D nu n nu WHVORN hi STATION 4 y Uy n DISPENSE STATION 3 36 n P DISPENSE 2 8 BED 45 WHUGRN lt BL on eeu 7 1 WHIBLU E jc STATION 3 DISPENSE WHUBLU wih Membrana Swilchag oe pe es stie STATION 2 odes Memo SENS e a Se DISPENSE AUXILLARY CONTROL BOARD Regulator STATION 1 Board DISPENSE SWITCH p MIR STATION 1 E WHI BRN GAN GAN i br m qM mu if 1 3 1 1 1 1 br Chassis Door 1 al DISPENSE 1 DISPENSE D 1 LOCKOUT Chassis Ground Ground Ey E E E E i Ground 272 3 120 VOLTS AC or 220 230 VOLTS AC 2 WIRE SINGLE PHASE 54 49179 110613 ELECTRICAL SCHEMATIC DIAGRAM for JDF 4S Models with Flourescent Lited Doors 1svmva 1svrva E E El punog sissey a
10. 120 volts ac for two wire 120 volt models or b 230 volts ac for two wire 230 volt models 5 Disconnect the dispenser from the power source If voltage is present as described proceed to the fol lowing test procedures If voltage is not present as described refer to the Con tactor and check the contactor 6 Disconnect the two black wires from the compres sor start relay 7 Remove relay from the compressor 8 Check for continuity across the upper left terminal and the right pin socket on the rear of the relay If continuity is present as described the compressor start relay is operating properly If continuity is not present as described replace re lay Compressor 1 With the compressor start relay 1 removed dis connect the black wire from the compressor 2 Check for continuity across the terminal on the compressor and the left pin on the compressor If continuity is present as described the electrical part of the compressor is operating properly If continuity is not present as described replace the compressor Thermal Overload Protector 1 Check for continuity across the terminals on the thermal overload protector 3 If continuity is present as described the thermal over load protector is operating properly If continuity is not present as described replace the thermal overload protector 49179 110613 SERVICE CONT Compressor Cont Removal and Replacement Compressor S
11. J6 connector on the wir ing harness Connect the dispenser to the power source The indication must be 24 volts ac Disconnect the dispenser from the power source If voltage is not presentas described refertothe Wiring Diagrams and check the dispenser wiring harness back to the transformer See TRANSFORMER J 1 Cold Water Switch J 2 Left Left Dispense Switch J 3 Left Middle Dispense Switch J 4 Right Middle Dispense Switch J 5 Right Right Dispense Switch J 6 Main Harness J 7 N A J 8 N A J 9 N A Removal and Replacement 1 Remove the five screws securing the door cover to the door frame 2 Carefully pull the cover forward and disconnect all switch harnesses from the connectors on the control board Remove the four 6 20 screws securing the control board to the light panel 4 Remove the spacers from the control board and discard the old board 5 Install the spacers on to the new control board 6 Install new control board on the light panel using four 6 20 screws 7 Position the door cover to the door frame and reconnect all switch harnesses to the connectors on the control board 8 Secure the door cover to the frame with the five screws previously removed FIG 30 CONTROL BOARD CONNECTORS 28 49179 110613 SERVICE CONT Circulation Pump all Models Removal and Replacement 1 Remove dispense platform s for ease of taking out recirculating pump 2 Remove left and right si
12. The Main Control Board is located on the electrical component enclosure behind the splash panel Test Procedure Power Supply Circuitry 1 Disconnect the dispenser from the power source With a voltmeter back probe check the voltage across pins 1 amp 3 of the J6 connector on the wir ing harness Connect the dispenser to the power source The indication must be 24 volts ac Disconnect the dispenser from the power source 2 3 If voltage is present as described proceed to step 4 If voltage is not presentas described refertothe Wiring Diagrams and checkthe dispenser wiring harness back to the transformer See TRANSFORMER 4 5 Disconnect the dispenser from the power source With a voltmeter back probe check the voltage across pins 1 amp 3 of the J12 connector on the wiring harness Connectthe dispenser to the power source The indication must be 24 volts ac 6 Disconnect the dispenser from the power source If voltage is not presentas described refertothe Wiring Diagrams and check the dispenser wiring harness back to the transformer See TRANSFORMER 25 Removal and Replacement 1 Removethefour 26 32 screws securing the control board to the component bracket Disconnect all the plugs on the main wiring harness from the connectors on the control board Remove the spacers from the control board and discard Install the spacers on to the new control board Reconnect all plugs on the main harness to t
13. The dispense buttons are located on the lower outside of the dispenser door and actuate switches on the dispense switch board located on the inside of the door Test Procedures NOTE Before continuing check that the ribbon cable is properly connected to the control board and not a pin off in either direction 1 Disconnect the dispenser from the power source 2 Remove the rear panel and disconnect ribbon cable 3 Check for continuity of the switches using pin 1as common 1 Common 2 ON STOP 3 Large 4 Medium 5 Small If continuity is not present when the appropriate switch is pressed the Membrane Switch must be replaced If continuity is present chech the short harness going to J6 on the Control Board Removal and Replacement 1 Disconnect the dispenser from the power source 2 Open the dispenser door 3 Remove the four 78 32 screws securing the lower door panel and remove the panel 4 Disconnect the six pin harness from the switch board 5 Carefully peel the membrane switch from the front of the switch bezel 6 Remove any excess adhesive from the bezel sur face 7 Remove the backing from the new membrane switch 8 Feed the membrane switch harness through the openning and apply the new membrane switch to the switch bezel 9 Connect the switch harness to the control board PORTION CONTROL FIG 46 MEMBRANE SWITCH 49179 110613 SERVICE CONT Cold Water Dispense Membrane Swit
14. This will disengage the grommet from the tank lid 5 Slide a new grommet on to the new temperature probe 6 Insert the temperature probe through the hole in the tank lid and press the grommet firmly and evenly so that the groove in the grommet fits into the tank lid 7 Reconnect the two pin connector to the dispenser main wiring harness BLKor ORN pin 1 WHI pin 2 FIG 66 TEMPERATURE PROBE TEMP RESISTANCE VOLTAGE SHORTED DO 32 F 31 2k 34k Q 3 0VDC 0 0 C 77 F 9 8k 10 2k Q 1 5VDC 25 0 C OPEN INFINITE 5 0VDC NOTE ALL FIGURES LISTED ABOVE ARE APPROXIMATE 47 49179 051914 SERVICE CONT Temperature Sensor all Models mor FIG 67 TEMPERATURE SENSOR Location The Temperature Sensor is located inside the cabinet between the fan and the water coil Test Procedures 1 Remove the left side housing panel 2 Connect a voltmeter across the two leads of the temperature sensor leave plug connected The indication must be a Approx 1 4 vdc 71 F b Approx 2 6 vdc 32 F If voltage reading is Ov the Control Board is not sup plying the necessary 5v and should be replaced If the reading stays at 5vdc replace sensor Alternate Test 2 Disconnect the plug on sensor leads and check resistance as indicated in chart If resistance reading is not within the range listed in chart replace sensor Removal and Re
15. Wiring Diagrams when reconnecting wires to Compressor Thermal Overload Protector and Start Relay 49179 110613 SERVICE CONT Compressor Switch all Models JDF 4S shown P1684 40 FIG 19 COMPRESSOR SWITCH Location On models JDF 2S and 45 early models had the switch located on the back of the dispenser next to the water inlet On later models JDF 2S 45 4D and 4SB the switch is located on the front left of the dispenser behind the splash panel Test Procedure 1 Disconnect the dispenser from the power source 2 Remove the two wires from the switch terminals 3 Check for continuity across the switch terminals with the switch in the ON position Continuity must not be present when the switch is in the OFF position If continuity is present as described reconnect the wires to the switch terminals If continuity is not present as described replace the switch Removal and Replacement 1 Disconnect the dispenser from the power source 2 Remove the cover or splash panel to gain access to the switch 3 Gently disconnect the wiring harness from the switch Remove the switch from the mounting bracket and discard Install the new into the mounting bracket Reconnect the wiring harness to the new switch Install covers or panels previously removed Reconnect power to the dispenser T NEOON RED BLK BLK
16. an ohmmeter to the end of each wire 4 Check for continuity between the two wires If continuity is present as described the ballast is operating properly If continuity is not present as described replace the ballast 5 Checkfor continuity between the other pair of black and blue wires Removal and Replacement 1 Disconnect the dispenser from the power source 2 Remove door cover by taking out the 5 screws and unplug the dispense switch harness from the door harness Set door cover and screws aside 3 Disconnect the 3 pin connector from the ballasts to the door harness 4 Remove fluorescent bulbs from the brackets Pull off the four snap in light sockets from the light panel 5 Remove the wire to the ballast from the back of each bracket 6 Todisengagethe ballast wire from the bracket push a 1 16 allen wrench or equivalent tool into the front hole that lines up with the wire in the back Pull the wire out 7 Repeat for each bracket 8 White jumper must remain in place on the back of the light socket 9 Removescrewsfrom each ballast Removethe green ground wire from the ballast bracket by removing the bracket s bottom screw Install the single ballast wires on the bottom onto the ballast bracket using 2 of the screws previously removed 11 Attach ballast wires to the back of bulb sockets by pushing wires into holes in back of socket Note Attach black wires to the top sockets and blue wires
17. m 1 Fi 1 1 RED 1 DISPENSE ORN 2 ORN RED Ve RED STATION 3 PNE PNK DISPENSE ORN 5 ORN e WHI GRN be z E STATION 4 1 DISPENSE i 0 THERMISTOR T 2 STATION 1 0 DISPENSE L i WATER BATH i P THERMISTOR c e 1 STATION 2 i WHI 22 DISPENSE 1 2 1 1 1 R WHIMIO WHUVIO sd D STATION 3 WHU ORN 105 WHVORN DISPENSE YEL TAN 0 TAN BLU GRY STATION 4 36 DISPENSE 15 1 1 WHUBLU 16 1 215 4 BLU J6 3 1 251 WHUBLU El 15 1 BLK BLU ll 112 3 Py BLK DISPENSE LOCKOUT 6 SWITCH ne 49179 110613 ELECTRICAL SCHEMATIC DIAGRAM for JDF 4D Portion Control Models 220 230V COMPRESSOR ASSY BLU BLK COLD WATER CONDENSOR FAN REFRIGERATION SWITCH RED BLK BLU BLK STATION 1 DISPENSE STATION 2 DISPENSE STATION 3 DISPENSE STATION 4 DISPENSE STATION 1 DISPENSE WATER BATH THERMISTOR STATION 2 DISPENSE O3 0wovroozAazoo STATION 3 DISPENSE STATION 4 DISPENSE COOLING LED v AUXILLARY CONTROL BOARD RINSE SWITCH DISPENSE LOCKOUT qe SWITCH Y sinc she E Sunc mmn Mee orem A Lcd DISPENSE DISPENSE DISPENSE STATION STATION STATION WATER STATION DISPENSE DISPENSE DISPENSE DISPENSE NOZZLE NOZZLE
18. present as described reconnect the two wires to the solenoid If continuity is not present as described replace the solenoid valve 4 Check the solenoid valve for coil action Connect the dispenser to the power source Listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts 5 Disconnect the dispenser from the power source 45 If the sound is heard as described and water will not pass through the solenoid valve there may be a block age in the water line before the solenoid valve or the solenoid valve may require inspection for wear and removal of waterborne particles If the sound is not heard as described replace the solenoid valve Removal and Replacement Remove the two wires from the solenoid valve Turn off the water supply to the dispenser Disconnect the water lines to and from the solenoid valve Remove the two 78 32 screws securing the sole noid to the dispenser base Remove solenoid Install new solenoid valve on the dispenser base and secure with the two 78 32 screws Securely fasten the water lines to and from the solenoid valve Refer to Schematic Wiring Diagrams when recon necting the wires COINS M BRN to Control Board WHI to Control Board 120V 1 2 230V 3 84 kO P1217 FIG 64 INLET SOLENOID VALVE TERMINALS 49179 110613 SERVICE CONT Temperature Probe all Models Also known as Water Bath Thermistor
19. to the bottom sockets Reference electrical sche matic if needed 12 Snap all 4 bulb sockets back onto light panel Re install fluorescent bulbs 13 Attach green ground wire to the bottom hole of the ballast bracket using 1 screw 14 Plug in 3 pin connector into the door harness 15 To replace door cover re connect the dispense switch harness to door harness Fasten with 5 SCrews 16 Reconnect power to the unit Test operation 1 o P1219 FIG 4 BALLAST TERMINALS 49179 110613 SERVICE CONT Cabinet Fan all Models JDF 2S shown P1684 40 FIG 5 CABINET FAN Location The cabinet fan is located inside the dispenser cabinet mounted in the center behind the fan guard cover Test Procedure 1 2 3 4 Disconnect the dispenser from the power source Remove the four screws attaching the fan and cover assembly Gently pull the cover forward and disconnect the 2 pin connector from the main wiring harness Check for continuity between the two wires on the fan If continuity is present as described the fan is operat ing properly If continuity is not present as described replace the fan Removal and Replacement 1 Disconnect the dispenser from the power source 2 Removethefour screws attaching the fan and cover assembly 3 Gently pull the cover forward and disconnect the 2 pin connector from the main wiring h
20. 0 5155219 39NAASIO de i asnaasia EN PERSE ERE n x 1 HOLIMS i NV4DO 44 Wola u NOUIS Nous er ISNZASIO un sur KS LLL 008 1081109 Ex or HOLIMS eh as AC NN ud 3 491 Ma a fer Uta te tea 5940446 eueiquie y IM HOPON 1H9lH SOLE SERT AE ezr YOLSINWYIJHL YOLSINYIJHL ES TIT 2 3539510 3534810 131 a 30 40 Wid D H0 D D OO OD 18 190 ond EJ 3sN3dsia 3834910 1H9IH 1431 30 30 09 NT18 IHM ASSY 3055389109 AMOS Sc dar 0 SILVINSHOS 51400 51400 NOEZ 022 49179 110613 52 ELECTRICAL SCHEMATIC DIAGRAM for JDF 2S Models with Flourescent Lited Doors 3SVHd JTONIS 38IM Z ov Dez 10 OV SITON 02 EI 1SvTW8 1SvTIv8 zm HP 3sNadsia puro punog sisseyg sisseyo punog 49179 110613
21. 13 SERVICE CONT Solenoid Cold Water JDF 4S only FIG 61 COLD WATER DISPENSE SOLENOID Location The Cold Water dispense solenoid is located at the inside rear of the chassis frame Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the two wires from the solenoid valve Press the Cold Water dispense switch on front of the door 3 With a voltmeter check the voltage across the two wires Connect the dispenser to the power source The indication must be a 120 volts ac for two wire 120 volt models three wire 120 208 volt and 120 240 volt models b 240 volts ac for two wire 240 volt models C 230 volts ac for two wire 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to Wiring Diagrams and check dispenser wiring harness 5 Check for continuity across the solenoid valve coil terminals If continuity is present as described reconnect the two wires to the solenoid If continuity is not present as described replace the solenoid valve 6 Check the solenoid valve for coil action Connect the dispenser to the power source Press the Cold Water dispense switch and listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts 7 Disconnect the
22. 32 locking screws securing the relay and mounting bracket to the chassis Remove and discard relay 3 Install the new relay to the mounting bracket and then onthe chassis using two 78 32 locking screws 4 Referto Fig 58 to reconnect the wires Terminal 1 BLK from Main Harness Terminal 0 WHI from Main Harness Terminal 8 BLK from Main Harness Terminal 6 WHI ORN from Main Harness FIG 58 RELAY TERMINALS Terminal 2 Terminal 4 49179 110613 SERVICE CONT Resistor all 230V Models FIG 59 RESISTOR Location The resistor is located on the relay at the electrical component mounting bracket on the lower front of the dispenser behind the splash panel Test Procedures 1 Disconnect the dispenser from the power source 2 Remove the resistor from the relay 3 Check the resistance across the terminals of the resistor with a ohmmeter The indication must be approximately 36ko 5 4 Disconnect the dispenser from the power source If resistance is present as described the resistor is operating properly If resistance is not present as described replace the resistor Removal and Replacement 1 Disconnect the dispenser from the power source 2 Disconnectthe resistor from the relay and discard 3 Install new resistor to the relay as shown below 4 Return power to the dispenser FIG 60 RESISTOR TERMINALS 49179 1106
23. F family JDF 4S 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 JDF 4S shown FIG 1 ACCESS PANELS 13 49179 110613 SERVICE CONT DISPENSE PLATFORM REMOVAL 1 Remove concentrate dispense tips by turning 1 4 turn to the left then pull straight down 2 Lift and remove product shelf to access dispense platform s 3 Remove front thumb screw holding dispense platform s 4 Disconnect 12 pin connector above dispense platform in rear 5 Disconnect 3 8 water line at quick disconnect 6 Remove dispense platform s by pulling forward Gr JDF 2S shown 2 c gt P lt a 0 de i 7 es G E bog Es EJ l Lj Ex y ga i A Po 4 ea des The JDF 4S uses 2 of the two head dispense platforms FIG 2 DISPENSE PLATFORM REMOVAL 14 49179 110613 SERVICE CONT Ballast JDF 2S 4S JDF 2S shown P1684 40 FIG 3 BALLAST Location The door lamp ballast is located inside the dispenser door mounted in the center of the door rear cover Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect a black and blue wire from one set of lamp sockets 3 Connect
24. IAGRAM for JDF 4D Press amp Release Models WHI GRN AUXILLARY m CONTROL BOARD TAN J6 5 WAVORN 184 WHIVIO IS Hi f i Hu T 86 T ie 29 4 Hu RINSE i 1 2 SWITCH __ I Lunnnuzumummnzrunxmaiiz ES f f f f i 2 Sly reet Sit 1 f O i i pi Di Di nisrense en en en 4 120 VOLTS AC v or 230 VOLTS WHV ORN 2 WIRE TAN a SINGLE PHASE 5 d WHUGRN 56 120V ss MODELS 1 t T 1 1 1 1 1 IA A 08 BLU A B 15 m 7 WHUBLU 8 if El WHI i xz TRANSFORME BLU 3t om whetu ib 3E 8 9 1 7777777 COMPRESSOR ASSY sl BLU BLK a COLD WATER gt WHI WHV BLK VALVE l WHI 5 WHIMIO 5 e BLU BLK e 4 REFRIGERATION SWITCH BLUBLK RED BLK RED BLK q Wg BLK Ke eee tl WATER INLET STATION 1 SEE DISPENSE S RED WHI RED BLK
25. JDF 2S JDF 4S Removal and Replacement 1 Disconnect power from the dispenser 2 Remove the five 76 32 screws securing the door cover to the door 3 Carefully lower the door cover and disconnect the lamp terminals from the LED regulator board 4 Remove and discard the faulty LED board 5 Install a new LED regulator board exposing the adhesive backing 6 Refer to Fig 54 and reconnect wires to the LED regulator board 7 Replace the door cover and secure with the five 6 32 screws 8 Return power to the dispenser LED regulator board FIG 53 LED DOOR LIGHTS Location The LED door lights are located inside the dispenser door Test Procedures No illumination at all First verify that the dispense lockout switch has not been turned off 1 Disconnect power from the dispenser 2 Checkthevoltageacross the blackand red leads ofJ2 or J3 at the LED regulator board with a voltmeter Reconnect power to the dispenser The indication must be 24 volts dc 3 Disconnect power from the dispenser If voltage is present as described the LED regulator board is working correctly 77 unregulated 30VDC If voltage is not present as described go to step 4 RA a 4 Check for supply voltage unregulated 30VDC across brown wire and white wire at J1 of the regulator board FIG 54 If voltge is present as described re
26. NOZZLE NOZZLE n n n n 120 VOLTS AC or 220 230 VOLTS AC 2 WIRE SINGLE PHASE 57 49179 110613 ELECTRICAL SCHEMATIC DIAGRAM for JDF 4S SB 120V 230V MODELS MODELS GRN TRANSFORMER MAIN POWER ON OFF x i BLK COMPRESSOR ASSY BLU BLK CONDENSOR FAN BLU BLK yy RED BLK STATION 1 STATION 2 DISPENSE DISPENSE 2 1 WHUORN 2 WHIORN lt CABINET STATION 1 STATION 2 x Van Vat TE ell BED TE RED WHI ORN XE d ORN ORN t 0 i T WATER BATH THERMISTOR STATION 3 STATION 4 i 5 DISPENSE DISPENSE L C i 0 l 1 D i STATION 3 STATION 4 i DISPENSE DISPENSE of lt n N WBUORN 1 YE D ORN L su 16 4 J63 412 1 J12 3 ma 120 VOLTS AC fe 11 5 or 230 VOLTS AC 8 2 WIRE eus i SINGLE PHASE oss iN LOCKOUT SWITCH Y 58 DISPENSE STATION DISPENSE STATION 3 nano nin 1 DISPENSE STATION 1 DISPENSE STATION 49179 110613
27. OR A PARTICULAR PURPOSE The agents dealers or employees of BUNN are not authorized to make modifications to this warranty or to make additional warranties that are binding on BUNN Accordingly statements by such individuals whether oral or written do not constitute warranties and should not be relied upon If BUNN determines in its sole discretion that the equipment does not conform to the warranty BUNN at its exclusive op tion while the equipment is under warranty shall either 1 provide at no charge replacement parts and or labor during the applicable parts and labor warranty periods specified above to repair the defective components provided that this repair is done by a BUNN Authorized Service Representative or 2 shall replace the equipment or refund the purchase price for the equipment THE BUYER S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS EQUIPMENT WHETHER DERIVED FROM WARRANTY OR OTHERWISE SHALL BE LIMITED AT BUNN S 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 392 A Partner You Can Count On Air Infusion AutoPOD AXIOM BrewLOGIC BrewMETER Brew Be
28. U BLK wire of the harness from the thermal overload protector 3 Remove relay 2 4 Removeoverload protector 3 and discard overload protector 5 Install new overload protector 3 on to the com pressor 6 Install relay 2 7 RefertoFig 10 and reconnect the thermal overload protector wires 8 Reinstall terminal cover 1 Compressor Assy NOTE Before removal of any refrigeration component the refrigerant in the system must be reclaimed by a licensed refrigeration repair person NOTE When replacing the compressor it is recom mended that the dryer also be replaced 1 Disconnect the tubes from the condenser and the accumulator 2 Disconnect the compressor wiring harness from the dispenser main wiring harness 3 Remove the four 25 20 keps nuts and washers securing the compressor to the chassis Set nuts and washers aside for reassembly 4 Disconnect and remove the transformer 5 From the right side of the dispenser lift the com pressor assembly over the four studs in the chassis and remove compressor WHI Wire FIG 9 RELAY TERMINALS ES FIG 10 THERMAL OVERLOAD PROTECTOR TERMINALS 6 Install new compressor over the four studs in the dispenser chassis with the fill valve to the right side of the dispenser 7 Secure compressor to the dispenser chassis using four 25 20 keps nuts and washers 8 Reconnect tubes from the condenser and the ac cumulator to the compressor 9 Reinstall trans
29. able 230V only 6 Capcitor 230V only T Cover Capacitor 230V only 21 Test Procedures Compressor Start Relay Refer to FIG 16 WARNING The compressor capacitor must be properly discharged before proceeding This is most commonly done on low voltage capacitors by shorting across the terminals with a screwdriver 1 Disconnect the dispenser from the power source Remove compressor terminal cover retainer 4 Connect a voltmeter across the white wire and the blue black wire Connectthe dispenserto the power source The indication must be a 120 volts ac for two wire 120 volt models or b 230 volts ac for two wire 230 volt models 5 Disconnect the dispenser from the power source If voltage is present as described proceed to the fol lowing test procedures If voltage is not present as described refer to the Con tactor and check the contactor 6 Disconnect the two black wires from the compres sor start relay 7 Remove relay from the compressor 8 Check for continuity across the upper left terminal and the right pin socket on the rear of the relay If continuity is present as described the compressor start relay is operating properly If continuity is not present as described replace re lay Compressor 1 With the compressor start relay 1 removed dis connect the black wire from the compressor 2 Check for continuity across the terminal on the compressor and the left pin on the compressor If continuit
30. ac replace board If yes 120 or230vac replace relay Note Relay contacts are normally open Check compressor thermal overload N C If open check for dirty con denser filter or adequate ventilation and space around machine Check refrigeration system for leaks and proper charge A Set switch to ON position B Check switch and harness for proper continuity Check all previous items that pretain to refrigeration or cold water recir culation 49179 110613 TROUBLESHOOTING Continued PROBLEM Dispense station not working All stations dispense concentrate only PROBABLE CAUSE 1 Dispense Lockout switch set to OFF position 2 Dispense switch failed Main water supply Frozen bath Inlet water valve failed REMEDY Place switch in ON position Check switch and harness for proper continuity Check for ON position A Compressor relay contacts short ed replace relay B Recirculating pump replace or check for kinked flex line A Check for 120V or 230V power when dispensing yes replace valve If no check harness for proper continuity Then replace circuit board if needed 49179 110613 TROUBLESHOOTING Continued PROBLEM PROBABLE CAUSE Dispense station Water solenoid concentrate only Dispense station Concentrate out water only Product pump not pumping Pump not turning REMEDY Replace solenoid 24vdc or check wire connection between water valve and main c
31. age across the two wire terminals of the valve solenoid Connect the dispenser to the power source The indication must be 24 volts ac YEL to Control Board 3 Disconnect the dispenser from the power source O 2 If voltage is present as described replace the valve 0 If voltage is not presentas described refertothe Wiring 0 Diagrams and check the dispenser wiring harness back Q to the transformer See TRANSFORMER P3503 FIG 40 DISPENSE VALVE CONNECTORS 33 49179 110613 SERVICE CONT Dispense Switches JDF 2S JDF 4S FIG 41 DISPENSE SWITCHES 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 Remove the five screws attaching the dispenser door cover to the door and move the door cover to gain access to the switches 3 With a voltmeter check the voltage across the two wires for each dispense switch Connect the dis penser to the power source The indication must be 5 volts dc If voltage is present as described proceed to 4 If voltage is not present as described refer tothe Wiring Diagrams and check the dispenser wiring harness 4 Check for continuity across the terminals top right to top left of the dispense switch with the switch in the ON position Continuity must not be present when the switch is in the OFF released posi tion If con
32. arness 4 Removethe fan fromthe cover assembly and discard the old fan 5 Install the new fan to the cover assembly using screws previously removed 6 Reconnect the fan to the 2 pin connector on the main wiring harness 7 Install the fan and cover assembly to the cabinet using screws previously removed 8 Reconnect power to the dispenser FIG 6 CABINET FAN TERMINALS 16 49179 110613 SERVICE CONT LG Compressor JDF 28 48 4D JDF 4S shown P1684 40 FIG 7 COMPRESSOR Location The compressor is located at the top of the dispenser frame P4298 20 FIG 8 COMPRESSOR THERMAL OVERLOAD PROTECTOR LOCATION 1 Compressor Terminal Cover 2 Compressor Relay 3 Thermal Overload Protector Test Procedures Compressor Relay Refer to FIG 8 1 Disconnect the dispenser from the power source 2 Remove compressor terminal cover retainer 1 3 Connect a voltmeter across the white wire and the blue black wire Connectthe dispenser to the power source The indication must be a 120 volts ac for two wire 120 volt models or b 230 volts ac for two wire 230 volt models 5 Disconnect the dispenser from the power source If voltage is present as described proceed to the fol lowing test procedures If voltage is not present as described refer to the Con tactor and check the contactor 6 Disconne
33. ch all Models S 2 3 Ds j pA we di J gt C FIG 47 MEMBRANE SWITCHES Location The dispense buttons are located on the lower outside of the dispenser door and actuate switches on the dispense switch board located on the inside of the door Test Procedures NOTE Before continuing check that the ribbon cable is properly connected to the control board and not a pin off in either direction 1 Disconnect the dispenser from the power source 2 Remove the rear panel and disconnect ribbon cable Check for continuity of the switches using pin 1as common 1 Common 2 Cold Water If continuity is not present when the appropriate switch is pressed the Membrane Switch must be replaced If continuity is present chech the short harness going to J6 on the Control Board Removal and Replacement COINS Disconnect the dispenser from the power source Open the dispenser door Remove the four 8 32 screws securing the lower door panel and remove the panel Disconnect the three pin harness from the switch board Carefully peel the membrane switch from the front of the switch bezel Remove any excess adhesive from the bezel sur face Remove the backing from the new membrane switch Feed the membrane switch harness through the openning and apply the new membrane switch to the switch bezel Connect the switch harness to the control board
34. ct the white wire from the compressor relay 7 Remove relay from the compressor 8 Check for continuity across the terminal and the pin socket on the rear of the relay If continuity is present as described the compressor start relay is operating properly If continuity is not present as described replace relay Compressor 1 Remove relay and yhermal overload protector 2 Check for continuity across the bottom pin on the compressor and the left top pin on the compressor If continuity is present as described the electrical part of the compressor is operating properly If continuity is not present as described replace the compressor Thermal Overload Protector 1 Check for continuity across the terminals on the thermal overload protector 3 If continuity is present as described the thermal over load protector is operating properly If continuity is not present as described replace the thermal overload protector 49179 110613 SERVICE CONT Compressor Cont Removal and Replacement Compressor Relay Refer to FIG 8 1 Remove the terminal cover 1 Disconnect the white wire from the compressor relay Pull relay 2 off ofthe compressor pins and discard Push new relay onto the compressor pins Refer to Fig 9 and reconnect the wires Reinstall terminal cover 1 no DOTE Compressor Thermal Overload Protector Refer to FIG 8 1 Remove terminal cover 1 2 Disconnect the BL
35. de panels 3 Remove silicone condensation hose out of bath tank along side recirculating pump 4 Disconnect pump motor and condenser fan wires 1 4 spade terminals 5 Remove2 screws leftand right side ofthe condenser mounting bracket Remove condenser fan assembly out the right side of the machine 6 Release recirculating pump holding bracket right side 2 nuts T Lift up on recirculating pump and maneuver out the right side of the machine S SS FIG 31 CIRCULATION PUMP Location RED BLKto The Circulation Pump is located on top of the water Compressor Switch bath tank cover WHI to Transformer Test Procedure 1 Disconnect the dispenser from the power source 2 With a voltmeter If voltage is present as described proceed to step 4 If voltage is not presentas described refertothe Wiring Diagrams and checkthe dispenser wiring harness back to the transformer See TRANSFORMER P3250 25 FIG 32 CIRCULATION PUMP 29 49179 110613 SERVICE CONT FIG 33 DISPENSE PLATFORM SWITCH Location The Dispense Platform Switch is located below the dispenser in the front center and is mounted on the component mounting bracket Test Procedure 1 2 3 4 Disconnect the dispe
36. dispenser from the power source If the sound is heard as described and water will not pass through the solenoid valve there may be a block age in the tank water outlet before the solenoid valve or the solenoid valve may require inspection for wear and removal of waterborne particles If the sound is not heard as described replace the solenoid valve Removal and Replacement Disconnect the dispenser from the power source Turn off the water supply to the dispenser Remove the two wires from the solenoid valve Disconnect the water line from the solenoid valve Remove the 710 32 screws securing the solenoid valve to the chassis frame Remove solenoid valve 6 Usingthe 710 32 screws install new solenoid valve to the chassis frame Reconnect the water lines to solenoid valve 8 Refer to schematic wiring diagrams when recon necting the wires eoe ct WHI VIO to Control Board WHI to Control Board FIG 62 COLD WATER SOLENOID TERMINALS 49179 110613 SERVICE CONT Solenoid Inlet all Models P1445 40 FIG 63 INLET SOLENOID VALVE Location The inlet solenoid is located inside on the rear of the dispenser base Test Procedures 1 Disconnect the dispenser source Disconnect the two wires from the solenoid valve Check for continuity across the solenoid valve coil terminals from the power 2 3 If continuity is
37. ed service person nel All electronic components have high voltage ac and low voltage dc potential on their terminals Shorting of terminals or the application of external voltages may result in board failure Intermittent operation of electronic circuit boards is unlikely Board failure will normally be permanent If an intermittent condition is encountered the cause will likely be a switch contact or a loose connection at a terminal or crimp Solenoid removal requires interrupting the water supply to the valve Damage may result if solenoids are energized for more than ten minutes without a supply of water The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened This will help to avoid twists and kinks in the tubing Make certain that all plumbing connections are sealed and electrical connections tight and isolated This unit is heated at all times Keep away from combustibles WARNING Exercise extreme caution when servicing electrical equipment e Unplug the dispenser when servicing except when electrical tests are specified Follow recommended service procedures Replace all protective shields or safety notices PROBLEM PROBABLE CAUSE REMEDY Cold Water Circulation 1 Cabinet cooling fan Replace fan 24vdc Dispense stations not working Note Fan receives power when the Note Cooling failure or excessive dispenser is powered cabinet temperatures for more than 4 hours will result in disp
38. embly 4 Disconnect and remove the transformer BLU BLK FIG 14 THERMAL OVERLOAD PROTECTOR TERMINALS 5 From the right side of the dispenser lift the com pressor assembly over the four studs in the chassis and remove compressor 6 Install new compressor over the four studs in the dispenser chassis with the fill valve to the right side of the dispenser 7 Secure compressor to the dispenser chassis using four 25 20 keps nuts and washers 8 Reconnect tubes from the condenser and the ac cumulator to the compressor 9 Reinstall transformer 10 Evacuate the system 11 Recharge 120V and 230V system with JDF 2S 9 oz Type R134A refrigerant Design Pressures High 255 Low 36 psi JDF 4S amp 4D 10 oz Type R134A refrigerant Design Pressures High 335 Low 88 psi NOTE The charging of the system must be done by a licensed refrigeration repair person NOTE Refer to Wiring Diagrams when reconnecting wires to Compressor Thermal Overload Protector and Start Relay 49179 110613 SERVICE CONT Compressor JDF 4SB P1684 40 FIG 15 COMPRESSOR Location The compressor is located at the top of the dispenser frame 230V shown P4068 FIG 16 COMPRESSOR THERMAL OVERLOAD PROTECTOR LOCATION 1 Compressor Start Relay 2 Wiring Harness Strain Relief 3 Thermal Overload Protector 4 Compressor Terminal Cover 5 C
39. ense lockout 2 Bath recirculation pump A If not running check refrigeration or no dispense switch and wiring for proper conti Note Reset fault timer by unplug nuity ging unit B Check for 120V or 230V AC at pump Replace pump 3 Restricted water flow to cabinet Check for kinked hose water coil and bath 6 49179 110613 TROUBLESHOOTING Continued PROBLEM Refrigeration Dispense stations not working Note Cooling failure or excessive bath and cabinet temperatures for more than 4 hours will result in dis pense lockout or no dispense Dispenser Locked Out Dispense stations not working Cooling system failure PROBABLE CAUSE 1 Compressor ON OFF switch 2 Dirty condenser filter or fins 3 Condenser fan not running 4 Compressor relay not activating 5 Compressor not running 6 Compressor running and not cooling 1 Check Dispense Lockout switch 1 Refrigeration or cold water recir culation system REMEDY Check for ON position or no continu ity replace switch Clean filter and fins or replace con denser filter Filter not supplied on some machines A Check for 120V or 230V AC Re place fan motor or check fan blades for obstructions B Check compressor LED on circuit board If ON relay coil should have power 120 or 230 VAC Check compressor relay coil for 120 or 230vac NOTE Always check power with coil attached If compressor LED is ON and no 120 or 230v
40. erminal cover 4 Compressor Assy NOTE Before removal of any refrigeration component the refrigerant in the system must be reclaimed by a licensed refrigeration repair person NOTE When replacing the compressor it is recom mended that the dryer also be replaced 1 Disconnect the tubes from the condenser and the accumulator 2 Disconnect the compressor wiring harness from the dispenser main wiring harness 3 Remove the four 25 20 keps nuts and washers securing the compressor to the chassis Set nuts and washers aside for reassembly BLU BLK GRN BLU from Capacitor from Capacitor FIG 17 RELAY TERMINALS FIG 18 THERMAL OVERLOAD PROTECTOR TERMINALS 4 Disconnect and remove the transformer 5 From the right side of the dispenser lift the com pressor assembly over the four studs in the chassis and remove compressor 6 Install new compressor over the four studs in the dispenser chassis with the fill valve to the right side of the dispenser 7 Secure compressor to the dispenser chassis using four 25 20 keps nuts and washers 8 Reconnect tubes from the condenser and the ac cumulator to the compressor 9 Reinstall transformer 10 Evacuate the system 11 Recharge 120V and 230V system with JDF 4SB 10 oz Type R134A refrigerant Design Pressures High 335 Low 88 psi NOTE The charging of the system must be done by a licensed refrigeration repair person NOTE Refer to
41. ervicing 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 JDF family of machines unless otherwise noted CONTENTS A eiae ou 2 Bg iH NRI 3 lte Preparation id oda 3 Preventive Maintenance Recommended Daily Cleaning enden co ocaeca een 4 Preventive Maintenance Sehedule e Patres 9 TROUBLE 6 SOVICO cane bh e ean b meras 12 Electrical SChel Tall S ae teens 50 USER NOTICES All notices on this equipment are written for your protection All notices are to be kept in good condition Replace any unreadable or damaged labels SITE PREPARATION A minimal clearance is required between the dispenser sides and the wall or another appliances For optimum performance do not allow warm air from surrounding machines blow on the JDF dispenser Leave some space so the dispenser can be moved for cleaning 3 49179 110613 Recommended Daily Cleaning Instructions The use of a damp cloth rinsed in any mild non abrasive liquid detergent is recommended for cleaning all surfaces on Bunn O Matic equipment Do NOT clean this equipment with a water jet device D E gt 1 Open dispenser door Lift up on 2 Close door place an empty con 3 Dis
42. est Procedure 1 2 Disconnect the dispenser from the power source Remove the five 710 32 screws securing the door cover to the door and move the cover aside to gain access to the light panel Rotate the lamp to remove from the lamp hold ers Check for continuity across terminals on each end of the lamp If continuity is present as described continue to step 5 If continuity is not presentas described replacethe lamp 5 Check for 24VDC supplied to ballast dual ballast black to red single ballast white to red If voltage is present as described replace ballast If voltage is not present as described refer to the Wiring Diagrams and check the wiring harness back to the transfomer rectifier Removal and Replacement 1 39 Disconnect the dispenser from the power source Remove the five 10 32 screws securing the door cover to the door and move the cover aside to gain access to the light panel Rotate the lamp to remove from the lamp hold ers Pry the lamp holder from light panel Cut the two wires from the ballast as close the lamp holder as possible and remove the lamp holder Strip the ends of the wires from the ballast and install the into the new lamp holder Snap the new lamp holder into the holes on the light panel Replace the lamps and install the door cover using the five screws previously removed FIG 52 LAMP HOLDERS 49179 110613 SERVICE CONT LED Lamps
43. former 10 Evacuate the system 11 Recharge 120V and 230V system with JDF 2S 9 oz Type R134A refrigerant Design Pressures High 255 Low 36 psi JDF 4S amp 4 10 oz Type R134A refrigerant Design Pressures High 335 Low 88 psi NOTE The charging of the system must be done by a licensed refrigeration repair person NOTE Refer to Wiring Diagrams when reconnecting wires to Compressor Thermal Overload Protector and Start Relay 49179 110613 SERVICE CONT GD Compressor JDF 28 4S 4D JDF 4S shown EPIO FIG 11 COMPRESSOR 2 P1684 40 Location The compressor is located at the top of the dispenser frame P4040 40 FIG 12 COMPRESSOR THERMAL OVERLOAD PROTECTOR LOCATION 1 Compressor Start Relay 2 Wiring Harness Strain Relief 3 Thermal Overload Protector 4 Compressor Terminal Cover Test Procedures Compressor Start Relay Refer to FIG 12 WARNING The compressor capacitor must be properly discharged before proceeding This is most commonly done on low voltage capacitors by shorting across the terminals with a screwdriver 1 Disconnect the dispenser from the power source 2 Remove compressor terminal cover retainer 4 3 Connect a voltmeter across the white wire and the blue black wire Connectthe dispenser to the power source The indication must be a
44. h Right Right Dispense Switch Main Harness N A N A N A gt Removal and Replacement Remove the five screws securing the door cover to the door frame Carefully pull the cover forward and disconnect all switch harnesses from the connectors on the control board Remove the four 76 20 screws securing the control board to the light panel Remove the spacers from the control board and discard the old board Install the spacers on to the new control board Install new control board on the light panel using four 26 20 screws Position the door cover to the door frame and reconnect all switch harnesses to the connectors on the control board Secure the door cover to the frame with the five screws previously removed FIG 26 CONTROL BOARD CONNECTORS 49179 110613 SERVICE CONT Push Button Control Board JDF 4D P4081 25 3 FIG 27 PUSH BUTTON CONTROL BOARD Location The Push Button Control Board is located inside the door cover mounted on the bracket Test Procedure 1 2 3 Disconnect the dispenser from the power source With a voltmeter back probe check the voltage across pins 1 amp 5 of the J6 connector on the wir ing harness Connect the dispenser to the power source The indication must be 24 volts ac Disconnect the dispenser from the power source If vo
45. he connectors on the control board Install new control board onthe component bracket using four 6 32 screws NOTE Verify all ground wires are connected to the grounding stud and secured with nuts NOTE If the main circuit board is being replaced the technician should also calibrate the water bath thermis tor after the new board is installed O gt NS JDF 2S FIG 24 CONTROL BOARD CONNECTORS 49179 051914 SERVICE CONT Portion Control Board JDF 2S 4S 1 FIG 25 PORTION CONTROL BOARD P4034 25 Location The Portion Control Board is located inside the door cover mounted on the bracket Test Procedure 1 2 3 Disconnect the dispenser from the power source With a voltmeter back probe check the voltage across pins 1 amp 5 of the J6 connector on the wir ing harness Connect the dispenser to the power source The indication must be 24 volts ac Disconnect the dispenser from the power source If voltage is not presentas described refertothe Wiring Diagrams and checkthe dispenser wiring harness back to the transformer See TRANSFORMER Cold Water Switch Left Left Dispense Switch Left Middle Dispense Switch Right Middle Dispense Switc
46. he power source The indication must be 5 volts de If voltage is present as described proceed to 4 If voltage is not presentas described refer tothe Wiring Diagrams and check the dispenser wiring harness 4 Check for continuity across the terminals top right to top left of the dispense switch with the switch in the ON position Continuity must not be present when the switch is in the OFF released posi tion If continuity is present as described reconnect the door wiring harness the switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Disconnect the dispenser from the power source 2 Remove the five screws attaching the dispenser door cover to the door and move the door cover to gain access to the switches 3 Disconnect the wires on the dispense switch from the door wiring harness 4 Compressthe clips inside the door on the dispense switch and gently push the switch through the opening 5 Push new switch into the opening and spread the clips to hold the switch in the door 6 Reconnect the wires to the dispense switch from door wiring harness 7 Reinstall the door cover and secure with the five screws previously removed 8 Referto Fig 44 when reinstalling wires P1449 FIG 44 COLD WATER SWITCH TERMINALS 49179 110613 SERVICE CONT Dispense Membrane Switch all Models FIG 45 MEMBRANE SWITCHES Location
47. itch place the dispense on off switch in the off position Step 3 Remove the thermistor from the bath tank and place the thermistor in a known 32 F bath or ice wa ter It is very critical that the water must be 32 F in order to calibrate the thermistor properly Step 4 Push and hold the two left dispense switches or both switches on a 25 model After a few sec onds the green water bath 34 LED on the board will flash slowly Step 5 While still holding the dispense switches tog gle the Program switch from the on position to the off position then back to the on position For early models without the program switch toggle the dispense on off switch from off to on and then back off again Step 6 The green water bath lt 34 LED on the board will flash rapidly for a few seconds When the green water bath lt 34 LED starts flashing slowly again release the dispense buttons The calibration is now complete Step 7 Place Program switch back in the off posi tion for normal operation or place the dispense on off switch back in the on position for normal opera tion 49179 051914 SERVICE CONT Removal and Replacement 1 Disconnect the dispenser from the power source 2 Remove the top rear cover 3 Disconnect the two pin connector from the dis penser main wiring harness 4 Remove the temperature probe by firmly pulling up on the tube at the tank lid
48. ltage is not presentas described refertothe Wiring Diagrams and checkthe dispenser wiring harness back to the transformer See TRANSFORMER N A Main Harness N A Rinse Switch Dispense Nozzles Disable Dispense Switches eue cu AA A 1 1 1 1 1 1 OND Removal and Replacement 1 Remove the five screws securing the door cover to the door frame 2 Carefully pull the cover forward and disconnect all switch harnesses from the connectors on the control board Remove the four 26 20 screws securing the control board to the light panel 4 Remove the spacers from the control board and discard the old board 5 Install the spacers on to the new control board 6 Install new control board on the light panel using four 26 20 screws 7 Position the door cover to the door frame and reconnect all switch harnesses to the connectors on the control board 8 Secure the door cover to the frame with the five screws previously removed FIG 28 CONTROL BOARD CONNECTORS 27 49179 110613 SERVICE CONT Portion Control Board JDF 4D P4081 25 ZZ 22 FIG 29 PORTION CONTROL BOARD Location The Portion Control Board is located inside the door cover mounted on the bracket Test Procedure 1 2 3 Disconnect the dispenser from the power source With a voltmeter back probe check the voltage across pins 1 amp 5 of the
49. nser from the power source With a voltmeter back probe check across the two black wires on the switch Return power to the dispenser The indication must be 24 volts ac Disconnect the dispenser from the power source If voltage is present as described proceed to step 5 If voltage is not presentas described refertothe Wiring Diagrams and check back to the control board J5 5 With an ohmmeter chech for continuity between the terminals shown in Fig 34 Continuity must be present when the switch is in the ON position If continuity is not present replace the switch 30 Removal and Replacement 1 2 Disconnect the dispenser from the power source Loosen the two 78 32 screws securing the com ponent mounting bracket to the dispenser base Disconnect the two black wires from the switch Press the locking tabs of the old switch and remove from the component mounting bracket Pressthe new switch into the component mounting bracket Connectthe two black wires to the switch terminals as shown below Position the component mounting bracket in the dis penser base and secure with two 78 32 screws Return power to the dispenser BLK to J5 3 BLK to J5 4 FIG 34 SWITCH TERMINALS 49179 110613 SERVICE CONT Dispense Pump all Models except JDF 4D 5 Install the new pump tube around the rotor and position into the rear housing with the clamp rest ing on the top edge 6 Install the front housing t
50. o Control Board J6 3 J12 3 FIG 70 TRANSFORMER TERMINALS 49179 110613 SERVICE CONT Transformer Lited Doors JDF 2S JDF 4S AA FIG 71 TRANSFORMER Location The transformer is located on the electrical com ponent mounting bracket on the lower front of the dispenser behind the splash panel Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnectthe four pin plug from the main harness from the four pin connector on the transformer 3 Check the voltage across black wire pin 1 and the white wire pin 2 on the plug from the main har ness Connect the dispenser to power source The indication must be a 120 volts ac for two wire 120 volt models three wire 120 208 volt and three wire 120 240 volt models b 240 volts ac for two wire 240 volt models C 230 volts ac for two wire 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described reconnect the plug and the connector and proceed to 5 If voltage is not presentas described refertothe Wiring Diagrams and check the main wiring harness 5 Check the voltage between J3 5 and J3 6 on the six pin connector at the control board Connect the dispenser to the power source The indication must be 24 volts ac If voltage is present as described the transformer is operating properly If voltage is not present as described replace the transformer Removal and Replacement 1 Loo
51. o be flush with the rear housing 7 Position the pump assembly back on the platform and secure with four 78 32 x 2 45 screws previously removed 8 Repeat for remaining pumps FIG 35 DISPENSE PUMP Location The Dispense Pumps are located on the platform assembly Removal Inspection and Replacement 1 Loosen the four 78 32 x 2 45 screws securing the pump assembly to the platform 2 Pry the two halves of the pump housing apart to reveal the pump tube and the rotor 3 Inspect the pump tubing for signs of wear and replace every six months or as needed EUMD 4 Inspectthe pump rotor for signs of wear and replace FIG 36 DISPENSE PUMP COMPONENTS if necessary 31 49179 110613 SERVICE CONT Dispense Motor all Models FIG 37 DISPENSE MOTOR Location The Dispense Motors are located on the rear of the platform assembly Test Procedure 1 2 3 Disconnect the dispenser from the power source With a voltmeter check the voltage across the two wire terminals of the motor assembly Connect the dispenser to the power source The indication must be 24 volts ac Disconnect the dispenser from the power source If voltage is present as described replace the motor If voltage is not present as described refer to the Wiring Diagrams and check the dispenser wiring harness back to the transformer See TRANSFORMER Removal and Replacement 1 Disconnect the two wires from the dispense mo t
52. odels a oat e D REA 26 Circ lation eA erui 29 Dispense Platform WEG Era cs E Dee A Sete dE im 30 Dispense etate 31 Dispense Motor E A 32 Dispens Valet ERE DTE EM 33 Dispense Switches EROR E 34 Cold Water Dispense Switch So ront aee a bio oes 35 Dispense Membrane SWTICIIBS oec rete eres pere 36 Cold Water Membrane pec ite 37 A RM 38 HI aM cm ITE M LS 39 Lamp A uot Mr LARA 39 BP 40 cr cU TO REOR 41 Relay aeon otis noche Lot 42 Se Se DAE NEA c p ALLIES 43 A Wale eec A 44 SISSE P 45 Temperature Probe Water Bath Thermistor uec odit ota 46 Temperature Sens DP aos Ac id o IC 48 Trai S OLI HB asco ebat Basso M Mec vlc cae CE 49 Transformer Lited DOOTS rev 50 51 Schematic VWirifig DISOFdiTlsss 5c 52 12 49179 051914 SERVICE CONT ACCESS PANELS Location All access panels are similar through the whole JD
53. ontrol board Replace refill concentrate container or BIB Check for proper counterclockwise rotation of pump rollers If coun terclockwise replace pump tubing If clockwise wire connection to pump is reversed Switch wires on terminals A Check speed setting on circuit board and increase speed turn clockwise B Check for d c power to pump motor If yes replace motor assy If no check harness for proper conti nuity Then replace circuit board if needed 49179 110613 TROUBLESHOOTING Continued PROBLEM Water leak filling drip tray or around dispense deck area Water leaking beneath machine Erratic spray during dispense Dispense nozzle dripping water PROBABLE CAUSE 1 Initial fill setup 2 Dispense deck 3 Water pressure greater than 100psi 1 Bath tank overflow 2 Condensation from cabinet cool ing coil Dispense nozzle mixer missing or broken Dispense solenoid REMEDY Some expansion normal May fill drip tray during initial ice block formation Inspect or replace fittings clamps o rings solenoids and quick discon nect fittings NOTE Dispense deck area slopes to drain tube that leads to the drip tray Install water pressure regulator and reduce to 50 psi A Check all internal water connec tions B Check internal plumbing connec tions Check for routing of condensation tube to water bath Replace mixer Replace dispense deck solenoid 49179 110613
54. or 2 Loosen the four 28 32 screws securing the motor to the platform assembly and remove the motor 3 Inspect the gasket and rubber bushings for signs of wear and replace if necessary 4 Position the new motor into place with the gasket and bushings onto the platform Secure with four 8 32 screws previously removed 5 Reconnect the two wires to the motor as shown in Fig 38 FIG 38 DISPENSE MOTOR CONNECTORS 32 49179 110613 SERVICE CONT Dispense Valve all Models Removal and Replacement 1 Disconnect the two wires from the dispense valve 2 Remove the 76 32 screw and plate securing the water manifold tube to the valve 3 Loosen the two 76 32 screws securing the valve to the platform assembly and remove the valve 4 Install the new valve onto the platform and secure with two 76 32 screws previously removed 5 Inspect the o ring on the manifold tube connector for signs of wear and replace if necessary 6 Connect the water manifold tube to the valve and secure in place with the plate and 76 32 screw previously removed 7 Reconnect the two wires to the valve as shown in Fig 40 Location Dispense Station The Dispense Valves are located at the front of the 1 WHI VIO platform assembly Dispense Station 2 WHI ORN Dispense Station 43 WHI VIO Dispense Station 4 WHI ORN Test Procedure 1 Disconnect the dispenser from the power source 2 With a voltmeter check the volt
55. ource The indication must be a 120 volts ac for two wire 120 volt models three wire 120 208 volt and three wire 120 240 volt models b 240 volts ac for two wire 240 volt models C 230 volts ac for two wire 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 75 If voltage is not presentas described refertothe Wiring Diagrams and check the main wiring harness 5 Check the voltage between J6 1 and J6 3 at the control board Connect the dispenser to the power source The indication must be 24 volts ac If voltage is present as described the transformer is operating properly If voltage is not present as described replace the transformer Removal and Replacement 1 Loosen the two 78 32 screws securing the com ponent bracket to the dispenser housing base 2 Pullcomponentbracket outthe front ofthe dispenser far enough so the transformer can be disconnected from the main wiring harness 3 Remove the two 76 32 keps nuts securing the transformer to the component bracket 5 Remove and discard the transformer 6 Install new transformer on the component bracket and secure with two 26 32 keps nuts 7 RefertoFig 70 and connect the transformer to the main wiring harness 8 Place the component bracket into position and tighten the two 78 32 screws WHI from WHI BLU to Control Power Cord Board J6 1 J12 1 R BLK from Power Cord BLU t
56. parts and labor for 4 years or 40 000 pounds of coffee whichever comes first These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period This warranty does not apply to any equipment component or part that was not manufactured by BUNN or that in BUNN s judgment has been affected by misuse neglect alteration improper installation or operation improper maintenance or repair non periodic cleaning and descaling equipment failures related to poor water quality damage or casualty In addition the warranty does not apply to replacement of items subject to normal use including but not limited to user replaceable parts such as seals and gaskets This warranty is conditioned on the Buyer 1 giving BUNN prompt notice of any claim to be made under this warranty by telephone at 217 529 6601 or by writing to Post Office Box 3227 Springfield Illinois 62708 3227 2 if requested by BUNN shipping the defective equipment prepaid to an authorized BUNN service location and 3 receiving prior authorization from BUNN that the defective equipment is under warranty THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY WRITTEN OR ORAL EX PRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS F
57. pense from each station un product containers to discon tainer under the dispense noz til clear water flows from the nect them from the machine in zles dispense nozzle let 4 Open dispenser door and recon 5 Remove dispense nozzles and 6 With a warm soapy cloth wipe nect all product containers drip tray Wash all parts in warm down interior of cabinet and soapy water splash panel area behind dis pensing nozzles 7 Replace drip tray and dispense 8 Dispense from each station un nozzles til finished product flows from the dispense nozzles 4 49179 110613 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 39690 0000 Pump Tube Replacement Kit Includes items indented below 28755 1011 Tube Norprene 25 ID x 17 0 Ig 32732 0000 Clamp 39 48 32656 0000 Fitting Elbow 25 Barb x 38 Barb 21275 0003 Clamp 57 70 34325 0032 Hose Flex 38 ID x 5 25 lg 0 5 49179 110613 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 qualifi
58. place LED regulator board If voltage is not present as described check the wiring back to the main CBA 40 49179 110613 SERVICE CONT Rectifier JDF 2S JDF 4S Removal and Replacement Disconnect the wires from the rectifier Remove the 10 32 screw securing the rectifier Remove the rectifier and discard Secure new rectifier with 10 32 screw Refer to Fig 56 and reconnect the wires NIN BLU from Door Harness WHI GRN to Transformer AC WHI BLK to Transformer AC S WHI from Door Harness X FIG 55 RECTIFIER FIG 56 RECTIFIER TERMINALS Location The rectifier is located on the electrical component mounting bracket on the lower front of the dispenser behind the splash panel Test Procedures 1 Disconnect the dispenser from the power source 2 Removethe blue wire and the white wire from the rectifier 3 Check the voltage across the and terminals on the rectifier with a voltmeter Connect the dis penser to the power source The indication must be approximately 24 volts dc 4 Disconnect the dispenser from the power source If voltage is present as described the rectifier is op erating properly If voltage is not present as described refer to the dispenser wiring diagram and check the wiring back to the transformer 41 49179 110613 SERVICE CONT Relay all Models
59. placement 1 Remove the left side housing panel 2 Disconnect the plug on the temperature sensor leads from the connector on the dispenser main harness 3 Open the cabinet door and remove the product containers 4 Remove the cabinet fan and fan guard assembly 5 Clip off the connector and pull the temperature sensor from the top left rear of the cabinet and discard 6 Push new temperature sensor wires into the grom met at the top left rear of the cabinet and secure to sensor mounting clip 7 Referto Fig 68 and connect the wires to the new plug 8 Connectthe sensor plug to the connector from the main harness 9 Reinstall the cabinet fan and guard assembly 10 Reinstall the left side housing panel 1 BLK to GRY J7 1 Control Board Positive 2 BLK to WHI BLK J7 2 Control Board Negative 21 FIG 68 TEMPERATURE SENSOR TEMP RESISTANCE VOLTAGE SHORTED ovDC 32 F 1 5K 2 5VDC 0 C F 77 3500 1 1VDC 25 0 INFINITE 5 0VDC NOTE ALL FIGURES LISTED ABOVE ARE APPROXIMATE 49179 020514 SERVICE CONT Transformer all Models FIG 69 TRANSFORMER Location The transformer is located on the electrical com ponent mounting bracket on the lower front of the dispenser behind the splash panel Test Procedure 1 Disconnect the dispenser from the power source 2 Checkthe voltage across black wire and the white wire from the main harness Connect the dispenser to power s
60. r to bottle adapter assembly 49179 110613 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 specifically states to connect the dispenser to the power source COMPONENT ACCESS WARNING Disconnect the dispenser from the power source before the removal of any panel or the replacement of any component All components are accessible by opening the door removal of the door panels dispenser top covers hopper s hopper support plate splash guard splash panel w drip tray lower front access panel and rear ac cess cover Refer to the contents listing for component location INDEX PEC ESS HP AMIENS 13 Dispense Platform REMOW Al ct reote tex eode ne 14 15 Cabinet Eo tender ue Aea 16 COMTE Ut hA MD P eS 17 did 23 DE 24 Control aisle a ch a 25 Control Board Portion Control M
61. sen the two 78 32 screws securing the com ponent bracket to the dispenser housing base 2 Pullcomponentbracket outthe front ofthe dispenser far enough so the transformer connector can be disconnected from the main wiring harness 3 BDisconnectthetransformerfour pin connector from the four pin plug on the main wiring harness 4 Remove the two 6 32 keps nuts securing the transformer to the component bracket 5 Remove and discard the transformer 6 Install new transformer on the component bracket and secure with two 26 32 keps nuts 7 Connect the four pin connector on the transformer to four pin plug on the main wiring harness 8 Place the component bracket into position and tighten the two 78 32 screws WHI GRN T8 _ WHI BLK T12 H B JAA WHI 120V T2 240V T6 BLK TI FIG 72 TRANSFORMER TERMINALS 49179 110613 9 10 Inlet Water Valve 010 11 Station 4 Water Q8 Cou mo eno Ou pe vog NOE Triac Map Compressor Relay Q25 Station 2 Water Q27 Station 1 Water Q28 Station 1 Concentrate Q23 Station 2 Concentrate Q18 Station 3 Concentrate Q17 Station 4 Concentrate Q13 Station 3 Water Q7 Cold Water Valve Q11 51 gt ET fp 49179 012214 ELECTRICAL SCHEMATIC DIAGRAM for JDF 2S Models with LED Lited Doors 3SVHd 319NIS Z SLIOA 02 022 10 JV 5110 021 HOLIMS T HOLIMS E punog punolg 5155849 inoxi 110901 lt 200
62. tart Relay Refer to FIG 12 1 Remove the terminal cover 4 2 Disconnect the wires from the compressor start relay 3 Pull relay 1 off of the compressor pins and dis card 4 Push new relay onto the compressor pins 5 Refer to Fig 26 and reconnect the wires 6 Reinstall terminal cover 4 Compressor Thermal Overload Protector Refer to FIG 12 1 Remove terminal cover 4 2 Disconnect the BLU BLK wire of the harness from the thermal overload protector 3 Disconnect the BLK wire from the Compressor s upper terminal 4 Remove overload protector 3 and start relay as an assembly 5 Removeoverload protector 3 and discard overload protector 6 Install new overload protector 3 on to the relay 1 7 Install relay 1 and overload protector 2 on the compressor terminal bracket 8 Refer to Fig 27 and reconnect the thermal overload protector wires 9 Reinstall terminal cover 4 Compressor Assy NOTE Before removal of any refrigeration component the refrigerant in the system must be reclaimed by a licensed refrigeration repair person NOTE When replacing the compressor it is recom mended that the dryer also be replaced 1 Disconnect the tubes from the condenser and the accumulator 2 Disconnect the compressor wiring harness from the dispenser main wiring harness 3 Remove the four 25 20 keps nuts and washers securing the compressor to the chassis Set nuts and washers aside for reass
63. tinuity is present as described reconnect the door wiring harness the switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Disconnect the dispenser from the power source 2 Remove the five screws attaching the dispenser door cover to the door and move the door cover to gain access to the switches 3 Disconnect the wires on the dispense switch to be removed from the door wiring harness 4 Compress the clips inside the door on the dispense switch and gently push the switch through the opening 5 Push new switch into the opening and spread the clips to hold the switch in the door 6 Reconnect the wires to the dispense switch from door wiring harness 7 Reinstall the door cover and secure with the five screws previously removed 8 Refer to Fig 42 when reinstalling wires Station 3 P1449 FIG 42 DISPENSE SWITCH TERMINALS 49179 110613 SERVICE CONT Cold Water Dispense Switch JDF 4S only FIG 43 COLD WATER DISPENSE SWITCH Location The cold water dispense switch is located on the lower outside of the dispenser door Test Procedure 1 Disconnect the dispenser from the power source 2 Remove the five screws attaching the dispenser door cover to the door and move the door cover to gain access to the switch 3 With a voltmeter check the voltage across the two wires for the dispense switch Connect the dispenser to t
64. tter Not Bitter Brew WISE BrewWIZARD BUNN Espress BUNN Family Gourmet BUNN Gourmet BUNN Pour O Matic BUNN BUNN with the stylized red line BUNNlink Bunn OMatic Bunn O Matic BUNNserve BUNNSERVE with the stylized wrench design Cool Froth DBC Dr Brew stylized Dr design Dual Easy Pour EasyClear EasyGard FlavorGard Gourmet Ice Gourmet Juice High Intensity iMIX Infusion Series Intellisteam My Caf Phase Brew PowerLogic Quality Beverage Equipment Worldwide Respect Earth Respect Earth with the stylized leaf and coffee cherry design Safety Fresh savemycoffee com Scale Pro Silver Series Single Smart Funnel Smart Hopper SmartWAVE Soft Heat SplashGard The Mark of Quality in Beverage Equipment Worldwide ThermoFresh Titan trifecta TRIFECTA sylized logo Velocity Brew Air Brew Beverage Bar Creator Beverage Profit Calculator Brew better not bitter Build A Drink BUNNSource Coffee At Its Best Cyclonic Heating System Daypart Digital Brewer Control Element Milk Texturing Fusion Nothing Brews Like a BUNN Picture Prompted Cleaning Pouring Profits Signature Series Sure Tamp Tea At Its Best The Horizontal Red Line Ultra are either trademarks or registered trademarks of Bunn O Matic Corporation The commercial trifecta brewer housing configura tion is a trademark of Bunn O Matic Corporation 2 49179 031314 INTRODUCTION Safety first To avoid electrical shock unplug dispenser from power source before s
65. y is present as described the electrical part of the compressor is operating properly If continuity is not present as described replace the compressor Thermal Overload Protector 1 Check for continuity across the terminals on the thermal overload protector 3 If continuity is present as described the thermal over load protector is operating properly If continuity is not present as described replace the thermal overload protector 49179 110613 SERVICE CONT Compressor Cont Removal and Replacement Compressor Start Relay Refer to FIG 16 1 Remove the terminal cover 4 2 Disconnect the wires from the compressor start relay 3 Pull relay 1 off of the compressor pins and dis card 4 Push new relay onto the compressor pins 5 Refer to Fig 16 and reconnect the wires 6 Reinstall terminal cover 4 Compressor Thermal Overload Protector Refer to FIG 16 1 Remove terminal cover 4 2 Disconnect the WHI ORN wire of the harness from the thermal overload protector 3 Disconnect the BLK wire from the Compressor s upper terminal 4 Remove overload protector 3 and start relay as an assembly 5 Removeoverload protector 3 and discard overload protector 6 Install new overload protector 3 on to the relay 1 7 Install relay 1 and overload protector 2 on the compressor terminal bracket 8 RefertoFig 17 and reconnectthe thermal overload protector wires 9 Reinstall t

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