Bunn JDF-4SB, JDF-4D manual GD Compressor JDF-2S,4S,4D

Page 19

SERVICE (CONT.)

GD Compressor (JDF-2S,4S,4D)

JDF-4S shown

FIG. 11 COMPRESSOR

P1684.40

 

Location:

 

The compressor is located at the top of the dispenser frame.

1

3

 

 

 

2

4

 

 

FIG.12 COMPRESSOR THERMAL

P4040.40

 

 

 

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. Connect the 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.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.

19

49179

110613

 

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Contents Phone 217 529-6601 FAX 217 JDF-4D, JDF-4SBBUNN-O-MATIC Commercial Product Warranty Introduction Recommended Daily Cleaning Instructions Required Regular Maintenance Cold Water Circulation Problem Probable CauseRemedy Refrigeration Problem Probable Cause RemedyDispenser Locked Out Check for kinked flex line When dispensing. If yes, replaceContinuity Ed replace relayWater only Concentrate only100psi Nect fittingsTray Water pressure greater thanReplace control board Pump tubing Inspect, clean, or replace tubing AgeAdapter assembly Unit is not workingComponent Access ServiceAccess Panels Servicecont Access PanelsDispense Platform Removal Servicecont Dispense Platform RemovalLocation ServiceTest Procedure Ballast JDF-2S,4SCabinet Fan all Models Remove the four screws attaching the fan and cover assemblyLocation LG Compressor JDF-2S,4S,4DDesign Pressures High 335 Low 88 psi CompressorCompressor GD Compressor JDF-2S,4S,4DDisconnect and remove the transformer Compressor Thermal Compressor JDF-4SBBLU/BLK Compressor Switch Compressor Switch all ModelsCondenser FAN Condenser Fan all ModelsControl Board, Main all Models Test Procedure Power Supply CircuitryTo the transformer See Transformer Portion Control Board JDF-2S,4SWith a voltmeter, back probe check the voltage Source. The indication must be 24 volts acPush Button Control Board Push Button Control Board JDF-4DPortion Control Board JDF-4D With a voltmeter Circulation Pump all ModelsDisconnect the two black wires from the switch Dispense Platform Switch all ModelsReturn power to the dispenser Dispense Pump Dispense Pump all Models except JDF-4DDispense Motor all Models Reconnect the two wires to the motor as shown in FigDispense Valve Dispense Valve all ModelsDispense Switches Dispense Switches JDF-2S, JDF-4SCold Water Dispense Switch Cold Water Dispense Switch JDF-4S onlyLocation Dispense Membrane Switch all ModelsMembrane Switch EMI Filter EMI Filter all ModelsLamps & Holders Lamps, Holders and Ballasts Early ModelsLED Lamps JDF-2S, JDF-4S Disconnect power from the dispenserLED regulator board Rectifier Rectifier JDF-2S, JDF-4SRelay all Models Refer to to reconnect the wiresVolts ac for 120 volt models Volts ac for 230 volt models Resistor Resistor all 230V ModelsIf voltage is present as described, proceed to #5 Solenoid Cold Water JDF-4S only120V 1.2 kΩ 230V 3.84 kΩ Solenoid Inlet all Models77 F 8k 10.2k Ω Temperature Probe all ModelsTemp Resistance Voltage 32 F 31.2k 34k Ω32 F 5k Ω Temperature Sensor all Models77 F 350 Ω Transformer Terminals Transformer all ModelsTransformer Lited Doors JDF-2S, JDF-4S Water Q7 Compressor Relay Q25Water Q27 Water Q28Diagram for JDF-2S LED Lited Doors Schematic Wiring Schematic Wiring Diagram JDF-4S Schematic Wiring Diagram JDF Schematic Wiring Diagram JDF-4D Schematic Wiring Diagram JDF-4D Electrical Schematic Diagram
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JDF-4D, JDF-4SB, JDF-4S specifications

The Bunn JDF-4S is a high-performance commercial coffee brewer designed to meet the needs of busy coffee shops, restaurants, and other establishments requiring a reliable and efficient coffee brewing solution. This versatile machine boasts an array of advanced features and technologies, making it a prominent choice among professionals in the coffee industry.

One of the most notable features of the Bunn JDF-4S is its ability to brew up to 4 gallons of coffee per hour, ensuring that establishments can keep pace with high-demand environments. This capacity makes it an ideal choice for venues that experience peak periods of coffee consumption, minimizing wait times for customers. The machine is designed with a multiple-brew option, allowing users to select various brew methods, which can cater to diverse customer preferences.

The JDF-4S incorporates Bunn’s patented brewing technology, which utilizes a precision-controlled process to ensure optimal flavor extraction. The brewed coffee is delivered at an ideal temperature, typically between 195°F and 205°F, promoting maximum taste and aroma. The machine also features a programmable digital controller that enables users to set specific brew times and adjust water temperature settings to achieve consistent results.

Another significant characteristic of the Bunn JDF-4S is its durability and ease of use. Constructed with high-quality materials, the machine is built to withstand the rigors of daily operation. The user-friendly interface features a simple touchpad design for easy navigation and programming. Additionally, the machine includes a built-in diagnostics program, helping users quickly identify and troubleshoot potential issues, thereby minimizing downtime.

The JDF-4S also offers flexible brewing options, including iced coffee brewing, enhancing its versatility. It is compatible with Bunn’s extensive range of coffee and tea dispensers, allowing businesses to expand their beverage offerings effortlessly. Furthermore, the unit features an easy-access water reservoir for quick refilling and reduced wait times during busy service periods.

In terms of maintenance, the Bunn JDF-4S is designed with user convenience in mind. The machine includes a rinse and clean cycle to ensure optimal hygiene and coffee quality. Integrated clean alerts guide users through the cleaning process, promoting regular upkeep and ensuring the longevity of the brewer.

In summary, the Bunn JDF-4S represents a cutting-edge solution for coffee brewing that prioritizes performance, versatility, and ease of use. With its advanced brewing technology, user-friendly features, and robust construction, it offers an exceptional choice for businesses seeking to serve high-quality coffee efficiently.
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