Bunn JDF-2S Service Manual Page 1

JDF-2SJDF-4SSilver Series®INSTALLATION & OPERATING GUIDEBUNN-O-MATIC CORPORATIONPOST OFFICE BOX 3227SPRINGFIELD, ILLINOIS 62708-3227PHONE: (217) 5

10OPERATING CONTROLS (Continued)Portion Control Option (Mechanical Switch Machines)The dispenser is also equipped with a portion control option. The f

11P3585FIG 14 Temperature LEDs JDF-2S(Early Models)FIG 15 Temperature LEDs JDF-4SP384539992 102008OPERATING CONTROLS (Continued)FIG 14A Temperature

12CLEANING & PREVENTIVE MAINTENANCEDaily: Rinse ProcedureTools required: 32 oz. (946 ml) minimum empty container1. Open dispenser door. Lift up o

1339992 042007CLEANING (cont)Monthly: Clean Condenser Coils1. Use a soft bristle brush to clean the build up of dirt in the condenser.NOTE: Some mode

146. Repeat steps 1 through 5 as necessary until the correct water flow rate is achieved.7. Repeat steps 1 through 5 for the remaining dispense posit

15Total Dispense Ratio Set Up Procedure1. Adjust water flow as described in Water Flow Testing and Adjustment. Record water output setting for later r

16ADJUSTMENT & OPTIONAL SETTINGS (cont)Dispenser LockoutDispense functions of the dispenser can be turned-off to prevent unauthorized use of the d

17Circuit Board LED Indicators - JDF-2S (Early Models) LED # LED Color Illuminates: 1 Green When the compressor should be ON. 2 Cabinet Red

1839992 102809FIG 18 JDF-4SFUNCTION LIST (Continued)31245P3845Circuit Board LED Indicators - JDF-4S and Late Model JDF-2S LED # LED Color Illumina

19TROUBLESHOOTINGA troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the probl

239992 110909BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTYBunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:1) All equipment oth

20TROUBLESHOOTING (cont.)Check for "ON" position or no con-tinuity - replace switch.Clean filter and fins or replace con-denser filter. (Filter

21TROUBLESHOOTING (cont.)Dispense station not workingAll stations dispense concentrate only1. Dispense Lockout switch set to OFF position.2. Dispen

22TROUBLESHOOTING (cont.)Dispense stationconcentrate onlyDispense stationwater onlyReplace solenoid (24vdc) or check wire connection between water

23TROUBLESHOOTING (cont.)Water leak filling drip tray or around dispense deck areaWater leaking beneath machineErratic spray during dispenseDispense no

24TROUBLESHOOTING (cont.)Unit is not workingDifficulty brixing and/or weak bev-erageDifficulty brixing and/or weak bev-erageDifficulty brixing bag-in-box

25COOLANT SCHEMATIC DIAGRAMCONDENSERSUCTIONACCUMULATORCOMPRESSOREVAPORATORPROCESS TUBEFILTERDRYER39992 042007

2639992 102809J6-1J11-1J11-5J6-1J6-5J6-3CONTROL P C BOARDJ5-1J5-4J2-1J2-6GRNWHI/ORNLEFTDISPENSERIGHTDISPENSELEFTDISPENSERIGHTDISPENSEYELYELWHI/VIORECI

2739992 102809SCHEMATIC WIRING DIAGRAM JDF-4SJ6-1J6-3CONTROL P C BOARDJ5-1J5-4J2-1J2-6GRNWHI/ORNSTATION 1DISPENSESTATION 2DISPENSESTATION 1DISPENSESTA

281. Install door cover by first plugging the door harness connector into the machine harness connector located at the bottom of the machine door.

3USER NOTICESCarefully read and follow all notices on the equipment and in this manual. They were written for your protec-tion. All notices are to be

4PLUMBING REQUIREMENTS This dispenser must be connected to a COLD WATER system with operating pressure between 20 and 100 psi (138 and 690 kPa). This

52. On Portion Control models, connect membrane switches to Door Circuit Board.4. Secure the door cover using 5 screws provided.DOOR COVER INSTAL

6INITIAL FILL CAUTION: The dispenser must be disconnected from the power source throughout the initial fill except when specified in the instructions.1.

7FIG 5 Initial Fill Connection - JDF-2SP35827. Turn ON the refrigeration switch at the back of the dispenser. This will start the water bath pump c

8PRIMING1. Open the dispenser door 2. Load concentrate per instructions in section titled Loading.3. Close the dispenser door.4. Place a large con

939992 071108FIG 11 Product Dispense Switches - JDF-2SProduct Dispense Switch (Membrane Switch Machines)A. Product Dispense Switch Momentarily pre