JDF-2S
JDF-4S
Silver Series
INSTALLATION & OPERATING MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
and the quickest way to obtain the catalog. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper
copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.
39992.0000A 04/07 ©2007 Bunn-O-Matic Corporation
USER NOTICES
Carefully read and follow all notices on the equipment and in this manual. They were written for your protec-
tion. All notices are to be kept in good condition. Replace any unreadable or damaged labels.
00986.0002
27442.0000
This equipment must be installed to comply with the
Basic Plumbing Code of the Building Officials and
Code Administrators International, Inc. (BOCA) and
the Food Service Sanitation Manual of the Food and
Drug Administration (FDA). For models installed
outside the U.S.A., comply with the applicable
Plumbing /SanitationCode.
00656.0000
12559.0003
CHARGE
Type R134A, Amount 9 oz (255 gm)
Design Pressures: High 255 psi (15.5 bar)
Low 36 psi (2.5 bar)
33461.0001
JDF-2S
CHARGE
Type R134A, Amount 10 oz (283 gm)
Design Pressures:
High 335 psi (23 bar) (2.31 MPa)
Low 88 psi (6 bar) (0.61 MPa)
33461.0000
JDF-4S
39992 042007
3
INITIAL SET-UP
CAUTION: The dispenser is very heavy! Use care when lifting or moving it. Use at least two people to lift or
move the dispenser. Place dispenser on a sturdy counter or shelf able to support at least 150 lbs. (68 kg). This
dispenser is designed for indoor use only.
Set the dispenser on the counter where it will be used. This dispenser requires a minimum of 4 inches (102
mm) of air clearance at the rear and 8 inches (203 mm) of air clearance above the dispenser. Minimal clearance
is required between the dispenser sides and the wall or another appliance. For optimum performance, do not let
warm air from surrounding machines blow on the dispenser. Leave some space so the dispenser can be moved
for cleaning.
ELECTRICAL REQUIREMENTS
CAUTION: The dispenser must be disconnected from the power source until specified in Electrical Hook-Up.
The 120V rated dispensers have an attached cord set and require a 2-wire, grounded, individual branch circuit
rated 120 volts ac, 15 amp, single phase, 60Hz. The mating connector must be a NEMA 5-15R.
The 230V rated dispenser has an attached cord set and requires an attachment plug cap rated at least 230
volts ac, 15 amp. The attachment plug cap must meet with applicable national/local electrical codes.
Refer to the data plate for exact electrical requirements.
ELECTRICAL HOOK-UP
CAUTION: Improper electrical installation will damage electronic components.
1. An electrician must provide electrical service as specified.
2. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source.
3. Confirm that the refrigeration switch on the rear of the dispenser is in the OFF position.
4. Connect the dispenser to the power source.
5. If plumbing is to be hooked up later, be sure the dispenser is disconnected from the power source. If plumb-
ing has been hooked up, the dispenser is ready for Initial Fill.
PLUMBING REQUIREMENTS
This dispenser must be connected to a COLD WATER system with operating pressure between 20 and 100
psi (138 and 690 kPa). This water source must be capable of producing a minimum flow rate of 3 fluid ounces
(88.7 milliliters) per second. A shut off valve should be installed in the line before the dispenser. Install a regu-
lator in the line when pressure is greater than 100 psi (690 kPa) to reduce it to 50 psi (345 kPa). The regulator
is also necessary if the water source has pressure fluxuations. The main water inlet is a 3/8” (9.52 mm) MFL
connection.
NOTE- At least 18 inches (457 mm) of an FDA approved flexible beverage tubing, such as reinforced braided
polyethylene, before the dispenser will facilitate movement to clean the countertop. It can be purchased direct
from BUNN-O-MATIC (part number 34325.10_ _ [see Illustrated Parts Catalog for complete part number.])
BUNN-O-MATIC does not recommend the use of saddle valves to install the dispenser. The size and shape of the
hole(s) made in the supply line(s) by saddle valves may restrict water flow.
This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials
and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the
Food and Drug Administration (FDA). For models installed outside the U.S.A., you must comply with
the applicable Plumbing/Sanitation Code for your area.
39992 042007
4
DOOR COVER INSTALLATION
1. Install door cover by first plugging the door harness connector into the machine harness connector located
at the bottom of the machine door.
P3577
P3577
JDF-4S
JDF-2S
2. Install door cover.
P3578
P3578
JDF-4S
JDF-2S
3. Secure the door cover using 5 screws provided.
P3840
P3579
JDF-4S
JDF-2S
39992 042007
5
PLUMBING HOOKUP
The plumbing connection is located on the rear of the dispenser. A 3/8" (9.52 mm) male flare adapter fitting
is supplied, installed on the rear of the dispenser.
P3841
P3580-1
FIG 2 Plumbing Connections - JDF-4S
FIG 1 Plumbing Connections - JDF-2S
INITIAL FILL
CAUTION: The dispenser must be disconnected from the power source throughout the initial fill except when
specified in the instructions.
1. Remove drip tray assembly and splash panel from the dispenser. Replace the drip tray.
2. Connect the water source to the back of the dispenser.
3. Pull the fill tube from the dispenser, remove the plug and connect it to the dispense nozzle.
4. Place the Dispense Lockout switch in the OFF position.
5. Connect dispenser to the power source. Press and hold the dispense button for the dispense station that the
tube is connected to for 10 seconds, until you hear the water valve turn on.
6. Monitor the water bath fill level until water starts to trickle from the overflow tube. Then press the dispense
button again to stop the fill process.
NOTE: The fill timer may time out before filling is complete. Press and hold the dispense button for 10 seconds
to start again if needed.
P3846
P3581-1
FIG 4 Initial Fill Hose - JDF-4S
FIG 3 Initial Fill Hose - JDF-2S
39992 042007
6
INITIAL FILL (Continued)
7. Turn ON the refrigeration switch at the back of the dispenser. This will start the water bath pump circula-
tion.
8. Check water level in the overflow tube and top off the tank if necessary (Step 5).
9. Disconnect the fill tube and allow excess water to drain into the drip tray. Replace the plug in the end of the
fill tube and store back into the dispenser.
10. Place the Dispense Lockout switch back to the ON position.
11. Replace the splash panel and drip tray.
12. It will take several hours to create the ice bank required for full dispenser performance. During this time, some
further trickling from the water bath is expected due to expansion caused by ice bank formation. While the
refrigeration system is creating the ice bank, the dispenser may be readied for use as described in Loading,
Priming and Adjustment.
P3582
P3842
FIG 6 Initial Fill Connection - JDF-4S
FIG 5 Initial Fill Connection - JDF-2S
39992 042007
7
LOADING
Frozen Concentrates
1. Thaw the frozen concentrate in a refrigerated 35-40 degrees F (1.6-4.4 degrees C) environment for 36 to 48
hours before use.
2. Thoroughly mix the thawed concentrate by vigorously shaking the product container.
3. Open the dispenser door.
4. Prior to placing the product container in the dispenser, make sure that the o-ring on the container adapter is
lubricated. This will ease removal of the container when it becomes necessary.
5. Place the product container in the desired position and press it firmly into the bottle adapter opening.
6. Open the vent hole in the product container.
Note: Concentrate in the container must be completely thawed and be within the temperature range of 35-40
degrees F (1.6-4.4 degrees C.) Product outside of this temperature range, especially below, will produce an
“out of brix” drink.
Ambient Concentrates (Optional)
1. Install an Ambient Concentrate Conversion Kit (BUNN-O-MATIC part number 33699.0001) per the instruc-
tions provided in the kit.
2. Attach the concentrate product hose to the appropriate concentrate line located at the rear of the dispens-
er.
3. Attach the other end of the product hose to the product container through an appropriate fitting.
PRIMING
1. Open the dispenser door
2. Load concentrate per instructions in section titled Loading.
3. Close the dispenser door.
4. Place a large container under the appropriate dispense nozzle.
Press and hold the “Product Dispense Switch” Fig 5, until concentrate dispenses from the dispense nozzle.
Note: This may take several seconds, depending on the installation and set pump speed.
39992 042007
8
OPERATING CONTROLS
Refrigeration Switch
The refrigeration switch is located on the rear of the dispenser near the center. This switch controls power to the
water bath pump and relay contacts for the compressor and condenser fan motor.
P3841
P3580-1
FIG 8 Refrigeration Switch - JDF-4S
FIG 7 Refrigeration Switch - JDF-2S
P3844
P3583
FIG 9 Product Dispense Switches - JDF-2S
A. Product Dispense Switch
FIG 10 Product Dispense Switches - JDF-4S
Pressing and holding switch will initiate product flow from the respective nozzle; releasing the switch will
stop the flow.
B. Dispense Lockout Switch (JDF-2S shown)
This switch is located at the bottom front of the
dispenser just behind the drip tray. It is used to turn
ON and OFF the Dispensing function. It is also used
for some programming and fill procedures.
FIG 11 Dispense Lockout SwitPc3h612
DISPENSER USE
Press and Hold Dispensing:
1. Place a cup on the drip tray beneath the desired dispensing nozzle.
2. Press and hold the “Product Dispense” switch until the beverage reaches the desired level, then release.
39992 042007
9
OPERATING CONTROLS (Continued)
Portion Control Option
The dispenser is also equipped with a portion control option. The following steps will guide you through the set
up process for this option. Portion control can be set on one or all dispense heads as needed.
1. Unplug dispenser from power source.
2. Place Dispense Lockout switch in the OFF position.
3. Remove drip tray and splash panel from the front of the machine then replace the drip tray.
4. Press and hold the left most (Station 1) dispense switch while plugging the dispenser into the power source.
Continue holding dispense switch(s) until all 4 temperature LED’s, Figs. 12 and 13 on the circuit board start
flashing slowly (this takes about 5 seconds). Release dispense switch(s).
5. Press and release any dispense switch 6 times to enter the portion control set up mode. This will cause the
4 temperature LED’s to flash rapidly.
6. Place a container under the desired dispense nozzle to measure the portion size.
7. Press and hold the desired dispense switch to dispense product until the desired amount of product is
achieved. (Maximum dispense time is 25 seconds). Repeat this on all dispense heads as desired.
8. Place Dispense Lockout switch back into the ON position. This will exit the Portion control set up mode.
9. Place a container under the dispense nozzle(s) and press the dispense button to confirm that the portion size
is set correctly. Repeat steps 1-8 if any changes are needed.
10. Replace splash panel.
Note: The portion control dispense can be cancelled during a dispense by pressing the dispense button again.
Note: If a portion size is not set for a dispense head while in the portion control set up mode, that dispense head
will remain a push and hold dispense head.
39992 042007
10
OPERATING CONTROLS (Continued)
Procedure to return all dispense heads back to Push and Hold mode:
1. Unplug dispenser from power source.
2. Place Dispense Lockout switch in the OFF position.
3. Remove drip tray and splash panel from the front of the machine then replace the drip tray.
4. For the JDF-2S, press and hold either dispense switch while plugging the dispenser into the power source.
For the JDF-4S, press and hold two left dispense switches while plugging the dispenser into the power
source. Continue holding dispense switch(s) until all 4 temperature LED’s on the circuit board start flashing
slowly (this takes about 5 seconds). Release dispense switch(s).
5. Press and release any dispense switch three times.
6. Place Dispense Lockout switch back into the ON position.
7. Replace splash panel and drip tray.
8. Place a container under each dispense nozzle and press dispense buttons to confirm machine is operating
in push and hold mode.
P3585
P3845
FIG 12 Temperature LEDs JDF-2S
FIG 13 Temperature LEDs JDF-4S
39992 042007
11
CLEANING & PREVENTIVE MAINTENANCE
Daily: Rinse Procedure
Tools required: 32 oz. (946 ml) minimum empty container
1. Open refrigerated compartment door and remove product containers.
2. Fill a clean container with warm water and place the container into the cabinet and press it firmly into the
bottle adapter opening.
3. Close the door, place an empty container under the dispensing nozzle and press the dispense switch until
clear water flows from the dispense nozzle.
4. Repeat steps 1 - 3 for all dispense stations.
Daily: Parts Washing
1. Remove and wash the dispense nozzle(s), mixing element(s), drip tray and drip tray cover in a mild detergent
solution. Rinse thoroughly.
2. Wipe splash panel, areas around dispense nozzle(s), and refrigerated compartment with a clean, damp
cloth.
Weekly: Semi-Automatic Sanitize Process
Tools required: 1 empty 5 gallon (18.9 L) bucket, 2 packets of Kay 5 sanitizer, and clean, empty concentrate
container.
1. Remove all concentrate from the dispenser and store in a separate refrigerated compartment.
2. Fill clean empty concentrate container(s) with approximately 32 oz. (946 ml) of hot tap water (approximately
140 Deg. F (60 Deg. C). Load the containers of hot water into the dispenser (just like concentrate).
3. Place an empty container under the dispense nozzles.
4. Press and hold the dispense button at each station until the stream out of the nozzles runs clear (about 30
seconds). Note: the dispenser will not allow all stations to run at the same time.
5. Once this is completed, remove the container(s) and empty.
6. Remove each dispense nozzle and mixing element and run under hot tap water to remove excess pulp.
7. Prepare 2.5 gal. (9.46 L) of sanitizing solution by dissolving 1 packet of Kay 5 sanitizer into 2.5 gal. (9.46 L)
of 120 Deg F (48.9 Deg. C) water to ensure 100 ppm of available chlorine.
8. Place nozzle(s) and mixing element(s) in a separate 1-quart container of sanitizing solutions and mix thor-
oughly. Allow the parts to soak for 2 minutes.
9. Clean the dispense nozzle receptacle(s) (dispense valves) with the sanitizing solution and a soft bristle
brush.
10. Clean the concentrate bottle’s inlet adapter(s) using the sanitizing solution and a soft bristle brush.
11. Replace the mixing element(s) and nozzle(s).
12. Fill approximately 128 ounces (3.8 L) of clean sanitizing solution into clean, empty concentrate container(s).
Do not use the sanitizing solution used in step 10. Load the container(s) into the dispenser.
13. Place the empty 5 gallon bucket under the dispense nozzles.
14. For the JDF-2S, press and hold both dispense buttons for about 10 seconds to initiate the sanitize cycle.
For the JDF-4S, press and hold three left most dispense buttons (Stations 1, 2 and 3) for about 10 seconds
to initiate the sanitize cycle. The cycle will start with only one of the dispense stations dispensing. Note: The
cycle will consist of a 1 minute dispense time (alternating) on each station, then 5 minutes of soak time, then
a 2 minute dispense time (alternating) on each station.
15. When the above cycle is complete, Remove the sanitizing solution and replace with concentrate.
16. At each station, press and hold the dispense switch until product appears. Then dispense one 12 ounce
(354.9 ml) glass of finished product and discard.
17. Wipe internal and external surfaces with a clean, damp cloth.
39992 042007
12
CLEANING (cont)
Monthly: Clean Condenser Coils
1. Use a soft bristle brush to clean the build up of dirt in the condenser.
NOTE: Some models include a removable filter that can be cleaned in warm soapy water.
Annually: Replace Pump Tubing
39690.0000
39688.0000
Tube Kit JDF-2S & JDF-4S
Tube Assembly
1. Open dispenser door.
2. Remove all product containers and place them in a refrigerated (35-40 degrees F [1.6-4.4 degrees C]) envi-
ronment. Disconnect all connections to ambient products from the bottle adapter.
3. Rinse all dispense stations using steps outlined in “DAILY RINSE PROCEDURE”.
4. Disconnect dispenser from power source.
5. Remove the dispense platform cover.
6. Disconnect the dispense platform water line(s) from the supply line inside the refrigerated cabinet and dis-
connect the wiring connection(s) from the cabinet receptacle(s).
7. Remove the mounting screw(s) securing the dispense platform(s) to the cabinet .
8. Pull the dispense platform(s) completely out of the cabinet and place it on a flat work surface.
9. Close the dispenser door.
10. Remove the 4 screws securing the pump head.
11. Gently pull the pump head apart.
12. Gently pull the pump tube from around the pump’s rotor.
13. Release the clamps securing the old pump tubing to the plastic elbows.
14. Pull the plastic elbows from the old pump tubing, and discard the old pump tubing.
15. Insert the plastic elbows into the new pump tubing and secure it with the clamps.
16. Gently wrap the new pump tubing around the pump’s rotor.
17. Reassemble the pump housing onto the platform assembly.
18. Repeat steps 10 through 17 for the remaining pump(s).
19. Replace the dispense platform(s) into the refrigerated cabinet, making sure to reconnect all electrical and
water connections.
20. Replace the dispense platform cover.
21. Turn power on to dispenser.
22 Install containers of rinse water, run each station and check for leaks. Repair leaks as necessary.
23. Replace product shelf and product containers. Reconnect any connections to ambient product containers.
24. Prime the pumps as described in “PRIMING” in the Initial Fill Section.
39992 042007
13
ADJUSTMENT & OPTIONAL SETTINGS
Water Flow Testing and Adjustment
1. Place a graduated measuring cup or the large chamber of the empty
brixing cup (BUNN-O-MATIC part number 33095.0000) under the ap-
propriate dispense nozzle. Place the Dispense Lockout switch in the
OFF position.
2. Press and release the desired “Product Dispense Switch” three
times.
3. The selected position will dispense water (no concentrate) only for 3
seconds.
4. Measure the water dispensed.
P3586
FIG 14 Adjusting Water Flow
Using 1/4" allen wrench
5. Adjust the water flow rate Fig 14, (clockwise to increase flow rate;
counterclockwise to decrease flow rate) to the corresponding product
mix ratio as follows:
Mix Ratio
(water + concentrate)
2+1
Adjust water flow rate to:
Product
Brix %
*3.75 fl. oz (111 ml)
per 3-second test
Prune Juice
Other
16.0%
*
Orange Juice
Pineapple Juice
Cranberry Fruit Cocktail
Grapefruit Juice
Lemonade
11.8%
12.8%
14.0%
10.6%
4+1
5+1
*4.0 fl. oz (118 ml)
per 3-second test
Apple Juice
Fruit Punch
Grape Juice
Other
12.0%
13.0%
3+1 through 7+1
Above 7+1
*
*
*4.0 fl. oz (118 ml)
per 3-second test
Other
High Viscosity Juice
2.25 - 3.0 fl. oz (66.5 - 89 ml)
per 3-second test
As Required
-
*Maximum flow rate may be less depending on the water pressure supply at each location.
Note: Information for specific products listed in this table is to be used for reference only. Consult the product
label for exact mix ratio and/or brix %. See product label for target brix %.
6. 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 positions.
8. Place the Dispense Lockout switch back into the ON position.
Pump Speed Adjustment
1. Disconnect the dispenser from the power source.
2. Remove the drip tray.
3. Remove the two screws securing the splash panel and remove the splash panel
4. Locate the adjustment knobs on the circuit board.
5. Turn the adjustment knobs clockwise to increase speed and counterclockwise to decrease speed.
6. The knob positions directly correspond to dispense station locations.
7. Reinstall the splash panel and drip tray and reconnect the dispenser to the power source.
39992 042007
14
ADJUSTMENT & OPTIONAL SETTINGS (cont)
Total Dispense Ratio Set Up Procedure
1. Adjust water flow as described in Water Flow Testing and Adjustment. Record water output setting for later
reference on each dispense head.
2. Place the Dispense Lockout switch in the OFF position.
3. Place a measuring container under the dispense nozzle, press and release the DISPENSE button 6 times.
4. Record the total ounces dispensed.
5. Refer to the Brix/Ratio chart below to confirm proper total dispensed amount for ratio desired and water
output previously recorded.
6. To increase or decrease the product output, refer to Pump Speed Adjustment section.
7. Place the Dispense Lockout switch back into the ON position.
ꢃ SECOND
WATER DISPENSE
ꢌOZ
2ATIO 4ARGET
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ꢆꢋꢊꢊ ꢅꢋꢃꢃ ꢅꢋꢊꢊ ꢄꢋꢈꢊ ꢄꢋꢆꢇ ꢄꢋꢅꢇ ꢄꢋꢅꢊ ꢄꢋꢄꢄ ꢄꢋꢄꢊ ꢄꢋꢃꢆ ꢄꢋꢃꢃ ꢄꢋꢃꢂ ꢄꢋꢀꢉ ꢄꢋꢀꢇ
ꢆꢋꢃꢈ ꢅꢋꢆꢇ ꢅꢋꢃꢂ ꢅꢋꢂꢊ ꢄꢋꢉꢆ ꢄꢋꢈꢆ ꢄꢋꢇꢈ ꢄꢋꢇꢀ ꢄꢋꢆꢈ ꢄꢋꢆꢄ ꢄꢋꢆꢊ ꢄꢋꢅꢈ ꢄꢋꢅꢅ ꢄꢋꢅꢃ
ꢆꢋꢇꢅ ꢆꢋꢊꢊ ꢅꢋꢆꢃ ꢅꢋꢄꢊ ꢅꢋꢀꢅ ꢅꢋꢂꢄ ꢅꢋꢊꢆ ꢅꢋꢊꢊ ꢄꢋꢉꢅ ꢄꢋꢉꢂ ꢄꢋꢈꢈ ꢄꢋꢈꢅ ꢄꢋꢈꢀ ꢄꢋꢈꢊ
ꢇꢋꢂꢃ ꢆꢋꢃꢃ ꢅꢋꢉꢄ ꢅꢋꢇꢊ ꢅꢋꢅꢄ ꢅꢋꢄꢃ ꢅꢋꢃꢄ ꢅꢋꢀꢈ ꢅꢋꢀꢃ ꢅꢋꢂꢈ ꢅꢋꢂꢅ ꢅꢋꢂꢀ ꢅꢋꢊꢉ ꢅꢋꢊꢇ
ꢇꢋꢅ ꢆꢋꢆꢇ ꢆꢋꢀꢅ ꢆꢋꢊꢊ ꢅꢋꢈꢃ ꢅꢋꢇꢂ ꢅꢋꢆꢃ ꢅꢋꢅꢆ ꢅꢋꢅꢊ ꢅꢋꢄꢅ ꢅꢋꢄꢀ ꢅꢋꢃꢈ ꢅꢋꢃꢆ ꢅꢋꢃꢃ
$ISPENSED PRODUCT ꢌOZ
Temperature Compensated Refractometer Method
1. Adjust the water flow as described in Water Flow Testing and Adjustment.
2. Place an empty container under the appropriate dispense nozzle.
3. Press and hold the “Product Dispense Switch” Figs 9 & 10, until water and concentrate begin flowing freely
from the dispense nozzle.
4. Discard the product caught previously and place the empty container back under the dispense nozzle.
5. Press and hold the “Product Dispense Switch” until the cup is filled.
6. Stir the contents of the cup, and use the refractometer (according to the manufacturer’s instructions) to check
the brix %.
7. Adjust the pump speed (down to decrease the brix %; up to increase the brix %) to achieve the correct brix
% as described in Pump Speed Adjustment.
39992 042007
15
ADJUSTMENT & OPTIONAL SETTINGS (cont)
Dispenser Lockout
Dispense functions of the dispenser can be turned-off to prevent unauthorized use of the dispenser, while keeping
the refrigeration system running.
1. Locate the Dispense Lockout switch at the bottom front of the dispenser behind the drip tray.
2. Place the switch in the OFF position to prevent dispensing.
3. Place the switch in the ON position to allow dispensing.
39992 042007
16
FUNCTION LIST
Circuit Board LED Indicators - JDF-2S
LED #
1
LED Color
Green
Illuminates:
When the compressor should be ON.
When the cabinet temperature is above 50 degrees F.
2 Cabinet
Red
Flashes slowly when cabinet temperature exceeds 50 degrees F for 4
hours. Dispense functions are locked out under this condition. Power
down the dispenser to reset.
Flashes rapidly if dispense is attempted in lockout condition.
Open cabinet thermistor circuit will flash #2 and #3 LED’s 1 time every 3
seconds.
Shorted cabinet thermistor will turn #2 and #3 LED’s on steady.
When cabinet temperature is below 50 degrees F.
3 Cabinet
4 Bath
Green
Red
When bath temperature is above 34 degrees F.
Flashes slowly when compressor is in a 6 minute delay period.
Open bath thermistor circuit will flash #4 and #5 LED’s 1 time every 3
seconds. The compressor will not run under this condition.
Shorted bath thermistor circuit will flash #4 and #5 LED’s 2 times every 3
seconds. The compressor will not run under this condition.
5 Bath
Green
When bath temperature is below 34 degrees F.
1
2
4
3
5
P3585
FIG 15 JDF-2S
39992 042007
17
FUNCTION LIST (Continued)
Circuit Board LED Indicators - JDF-4S
LED #
LED Color
Illuminates:
1 Bath
Red
When bath temperature is above 34 degrees F.
Flashes slowly when compressor is in a 6 minute delay period.
Open bath thermistor circuit will flash #4 and #5 LED’s 1 time every 3
seconds. The compressor will not run under this condition.
Shorted bath thermistor circuit will flash #4 and #5 LED’s 2 times every 3
seconds. The compressor will not run under this condition.
2 Bath
3
Green
Green
Red
When bath temperature is below 34 degrees F.
When the compressor should be ON.
4 Cabinet
When the cabinet temperature is above 50 degrees F.
Flashes slowly when cabinet temperature exceeds 50 degrees F for 4
hours. Dispense functions are locked out under this condition. Power
down the dispenser to reset.
Flashes rapidly if dispense is attempted in lockout condition.
Open cabinet thermistor circuit will flash #2 and #3 LED’s 1 time every 3
seconds.
Shorted cabinet thermistor will turn #2 and #3 LED’s on steady.
When cabinet temperature is below 50 degrees F.
5 Cabinet
Green
4
5
1
2
3
P3845
FIG 16 JDF-4S
39992 042007
18
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 qualified service person-
nel.
All electronic components have 120-240 volt 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.
WARNING – • Exercise extreme caution when servicing electrical equipment.
• Unplug the dispenser when servicing, except when electrical tests are specified.
• Follow recommended service procedures.
• Replace all protective shields or safety notices.
PROBLEM
REMEDY
PROBABLE CAUSE
Cold Water Circulation
1. Cabinet cooling fan.
Replace fan (24vdc).
Dispense stations not working.
Note: Cooling failure or excessive
cabinet temperatures for more
than 4 hours will result in dispense
lockout or no dispense.
Note: Reset fault/timer by unplug-
ging unit.
Note: Fan receives power when the
dispenser is powered.
2. Bath recirculation pump.
A) If not running, check refrigera-
tion switch and wiring for proper
continuity.
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.
39992 042007
19
TROUBLESHOOTING (cont.)
PROBLEM
REMEDY
PROBABLE CAUSE
Refrigeration
Dispense stations not working.
Note: Cooling failure or excessive
1. Compressor ON/OFF switch.
Check for "ON" position or no con-
tinuity - replace switch.
bath and cabinet temperatures for 2. Dirty condenser filter or fins.
more than 4 hours will result in
dispense lockout or no dispense.
Clean filter and fins or replace con-
denser filter. (Filter not supplied on
some machines).
3. Condenser fan not running.
A) Check for 120V or 230V AC. Re-
place fan motor or check fan blades
for obstructions.
B)CheckcompressorLEDoncircuit
board. If ON, relay coil should have
power (120 or 230 VAC).
4. Compressor relay not activat- Checkcompressorrelaycoilfor120
ing.
or 230vac.
NOTE: Always check power with
coil attached. If compressor LED
is ON and no 120 or 230vac - re-
place board. If yes, 120 or 230vac
- replace relay.
Note: Relay contacts are normally
open.
5. Compressor not running.
Checkcompressorthermaloverload
(N/C). If open check for dirty con-
denser filter or adequate ventilation
and space around machine.
6. Compressor running and not Checkrefrigerationsystemforleaks
cooling. and proper charge.
Dispenser Locked Out
Dispense stations not working.
1. Check Dispense Lockout switch. (A) Set switch to ON position.
(B) Check switch and harness for
proper continuity.
Cooling system failure.
1. Refrigeration or cold water recir- Check all previous items that pre-
culation system.
tain to refrigeration or cold water
recirculation
39992 042007
20
TROUBLESHOOTING (cont.)
PROBLEM
REMEDY
PROBABLE CAUSE
Dispense station not working
1. Dispense Lockout switch set to
OFF position.
Place switch in ON position.
2. Dispense switch failed
Checkswitchandharnessforproper
continuity.
All stations dispense concentrate Main water supply
only
Check for ON position.
Frozen bath
A) Compressor relay/contacts
shorted - replace relay.
B) Recirculating pump - replace or
check for kinked flex line.
Inlet water valve failed
A) Check for 120V or 230V power
when dispensing. If yes, replace
valve. If no, check harness for
proper continuity. Then replace
circuit board if needed.
39992 042007
21
TROUBLESHOOTING (cont.)
PROBLEM
REMEDY
PROBABLE CAUSE
Dispense station
concentrate only
Water solenoid
Replace solenoid (24vdc) or check
wire connection between water
valve and main control board.
Dispense station
water only
Concentrate out
Replacerefillconcentratecontainer
or BIB
Product pump not pumping
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.
Pump not turning
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 con-
tinuity. Then replace circuit board
if needed.
39992 042007
22
TROUBLESHOOTING (cont.)
PROBLEM
REMEDY
PROBABLE CAUSE
Waterleakfillingdriptrayoraround 1. Initial fill/setup
dispense deck area
Some expansion normal. May fill
drip tray during initial ice block
formation
2. Dispense deck
Inspect or replace fittings clamps,
o-rings,solenoidsandquickdiscon-
nect fittings.
NOTE: Dispense deck area slopes
to drain tube that leads to the drip
tray.
3. Water pressure greater than
100psi
Installwaterpressureregulatorand
reduce to 50 psi.
Water leaking beneath machine
1. Bath tank overflow.
A) Check all internal water connec-
tions.
B) Check internal plumbing con-
nections.
2. Condensation from cabinet cool- Check for routing of condensation
ing coil. tube to water bath.
Erratic spray during dispense
Dispense nozzle dripping water
Dispense nozzle mixer missing or Replace mixer.
broken
Dispense solenoid.
Replace dispense deck solenoid.
39992 042007
23
TROUBLESHOOTING (cont.)
PROBLEM
REMEDY
PROBABLE CAUSE
Unit is not working
1. Step-down transformer.
Checkfor120/24or230/24vac.Ifno
24vac reading, replace step-down
transformer.
2. Main control board.
If 24 vac present and no LED’s lit,
replace control board..
Difficulty brixing and/or weak bev- 1. Product viscosity or too cold.
erage
Thorough thaw of product before
use (35° - 40°)
2. Low water pressure.
Maintain 20 psi or higher and a
minimum flow rate of 3 fl oz/sec.
3. High water pressure.
Over 100 psi, install a pressure
regulator and set to 50 psi.
4. Dispense valve adjustment set- A)Perform3secondwaterdispense
ting.
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 %.
5. Brix ratio.
Checkforproperbrixratioperprod-
uct using Total Dispense method
and or refractometer method.
Difficulty brixing and/or weak bev- 1. Pump tubing.
erage
Inspect, clean, or replace tubing
and pump rotor/rollers for ease of
rotation.
2. Use of portable water pump.
A) Follow plumbing requirements
for pressure and flow rate.
B) Source another portable pump
or water supply that meets require-
ments.
Difficulty brixing bag-in-box
Vacuum leak
Inspect all lines and connections
frombag-in-boxconnectortobottle
adapter assembly.
39992 042007
24
COOLANT SCHEMATIC DIAGRAM
39992 042007
25
120V
MODELS
230V
MODELS
SCHEMATIC WIRING DIAGRAM JDF-2S
L1
N
GND L1 N
EMI
FILTER
A
A
B
B
A
A
B
B
GRN
TRANSFORMER
BLU
L
O
A
D
L
I
N
E
BLK
WHI
WHI/BLU
COMPRESSOR ASSEMBLY
K2
LIMIT
THERMOSTAT
WHI/BLK
WHI
K1
BLU/BLK
K2
COMP.
GRN
CONDENSOR FAN
WHI
BLU/BLK
MOTOR
REFRIGERATION
SWITCH
BLU/BLK
RED/BLK
RED/BLK
BLK
K1
WATER INLET
VALVE
WHI
RED/BLK
RECIR.
PUMP
BRN
WHI
LEFT
DISPENSE
RIGHT
DISPENSE
SOL
GRN
RED
VIO
RED
ORN
PUMP
PUMP
1
WHI/VIO
WHI/VIO
RED
ORN
VIO
J2-1
RED
WHI/RED
RED
BLK
J3-1
J3-2
FAN
VIO
WHI/ORN
YEL
VIO
WHI/ORN
YEL
YEL
WHI/ORN
WHI/VIO
LEFT
DISPENSE
RIGHT
DISPENSE
J2-6
GRY
WHI/BLK
J7-1
J7-2
RED
ORN
RED
ORN
WHI/VIO
WHI/ORN
YEL
YEL
C
O
N
T
R
O
L
SOL
SOL
1
12
BLK
WHI
J9-1
J9-2
P
C
B
O
A
R
D
t
CABINET
THERMISTOR
RIGHT
DISPENSE
SWITCH
t
WATER BATH
THERMISTOR
BLK
RED
GRN
1
GRN
RED
BLK
BLK
WHI/BLU
BLU
J5-1
J5-4
LEFT
DISPENSE
SWITCH
J6-1
J6-3
BLK
120 VOLTS AC
or
230 VOLTS AC
2 WIRE
SINGLE PHASE
DISPENSE
LOCKOUT
SWITCH
BLK
BLK
39992 042007
26
SCHEMATIC WIRING DIAGRAM JDF-4S
120V
MODELS
230V
MODELS
L1
N
GRN
GND L1
N
EMI
FILTER
A
A
B
B
A
A
B
B
TRANSFORMER
BLK
BLU
L
O
A
D
L
I
N
E
WHI
WHI/BLU
TRANSFORMER
BLU
L
O
A
D
L
I
N
E
BLK
WHI/BLU
WHI
COMPRESSOR ASSEMBLY
K2
COLD WATER
VALVE
LIMIT
THERMOSTAT
WHI
WHI/BLK
K1
BLU/BLK
K2
COMP.
WHI/VIO
WHI
SOL
GRN
CONDENSOR FAN
WHI
BLU/BLK
MOTOR
REFRIGERATION
SWITCH
BLU/BLK
RED/BLK
RED/BLK
BLK
K1
WATER INLET
VALVE
WHI
RED/BLK
RECIR.
PUMP
BRN
WHI
STATION 1
DISPENSE
STATION 2
DISPENSE
SOL
GRN
RED
VIO
RED
ORN
PUMP
PUMP
1
WHI/VIO
WHI/VIO
RED
WHI/RED
RED
BLK
J3-1
J3-2
FAN
RED
ORN
VIO
YEL
WHI/ORN
WHI/VIO
J2-1
GRY
WHI/BLK
J7-1
J7-2
VIO
WHI/ORN
YEL
VIO
WHI/ORN
YEL
1
STATION 1
DISPENSE
STATION 2
DISPENSE
J2-6
BLK
WHI
RED
ORN
RED
ORN
J9-1
J9-2
WHI/VIO
WHI/ORN
YEL
YEL
C
O
N
T
SOL
SOL
t
12
1
COLD WATER
DISPENSE
SWITCH
CABINET
THERMISTOR
R
O
L
STATION 3
DISPENSE
STATION 4
DISPENSE
RED
VIO
RED
ORN
BLU
BLK
P
C
B
O
A
R
D
PUMP
PUMP
WHI/VIO
TAN
t
STATION 4
DISPENSE
SWITCH
WATER BATH
THERMISTOR
WHI/GRN
GRN
J13-1
J13-6
8
BLK
BLK
BLK
BLK
ORN
YEL
PNK
VIO
WHI/ORN
YEL
PNK
BLU
GRY
YEL
ORN
BLU
GRY
BLU
TAN
J15-1
STATION 3
DISPENSE
SWITCH
STATION 3
DISPENSE
STATION 4
DISPENSE
J15-4
RED
ORN
WHI/GRN
GRN
WHI/VIO
WHI/ORN
YEL
YEL
GRN
RED
BLK
BLK
SOL
SOL
J5-1
12
1
STATION 2
DISPENSE
SWITCH
J5-4
WHI/BLU
BLU
J6-1
RED
GRN
J6-3
STATION 1
DISPENSE
SWITCH
WHI/BLU
BLU
J12-1
J12-3
BLK
120 VOLTS AC
or
230 VOLTS AC
2 WIRE
BLK
DISPENSE
LOCKOUT
SWITCH
SINGLE PHASE
39992 042007
27
QUICK SETUP GUIDE - JDF-2S and JDF-4S (JDF-2S shown)
P3577
1. Install door cover by first plugging the
door harness connector into the machine
harness connector located at the bottom
P3578
2. Install door cover.
of the machine door.
3. Secure the door cover using 5 scPr3e5w79s
provided.
P3587-1
P3580-1
P3588
4. Place refrigeration switch in the OFF po-
sition.
5. Connect water supply to machine. (See 6. Connect power supply to machine. (See
Plumbing Requirements)
Electrical Requirements)
P3589
P3582
8. Place the Dispense Lockout Ps3w612itch
in the OFF position.
7. Install bath tank fill tube over a nozzle as
9. Hold the dispense switch until water be-
gins to flow into the tank (approx. 10 sec-
onds). When tank is full, water will begin
pour out of the overflow tube, Press the
dispense button to stop the flow of water.
shown.(See Initial Fill)
12. Proceed to page 7 in the Operating and
Installation manual for calibration instruc-
tions and charts.
P3590-1
11. Insert juice containers as shown.P3591
10. Place the refrigeration switch in the ON
position.
39992 042007
28
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