Bunn CDS-3 service manual Contactor Electronic Control

Page 34

SERVICE (cont.)

6. Disconnect the black wires from contactor termi-

 

 

CONTACTOR - ELECTRONIC CONTROL

 

nals #6 & #8 (#5 & #6, CDS-3 first type contac-

 

 

 

tor).

 

 

 

 

7. With ON/OFF switch in the “ON” position, connect

 

 

 

the dispenser to the power source and check for

 

 

 

continuity across terminals on contactor.

 

 

 

If continuity is not present as described, on CDS-3 first

 

 

type contactors, replace contactor. If continuity is not

 

 

present between terminals #6 & #8 as described on all

 

 

CDS-2 contactors and CDS-3 second type contactors,

 

 

check for continuity across terminals #2 and #4.

 

 

If continuity is present as described, disconnect the

 

 

dispenser from power source and reconnect black

 

 

wires to terminals #2 and #4, the contactor will oper-

 

 

ate properly.

 

 

 

 

If continuity is not present as described, replace the

 

 

contactor.

 

 

 

P1342

Removal and Replacement:

 

 

 

FIG. 21 CONTACTOR - ELECTRONIC CONTROL

 

 

Location:

1. Disconnect the wires from the contactor.

 

2. Remove the two #8-32 locking screws securing

 

The contactor is located inside the dispenser chas-

 

 

the contactor to the component bracket. Remove

sis on the lower outside of the component bracket.

 

 

and discard contactor.

 

 

 

 

 

 

 

Test Procedures:

3. Install the new contactor on the component bracket

1.

Disconnect the dispenser from the power

 

using two #8-32 locking screws.

 

 

source.

4.

Refer to Fig. 22 and reconnect the wires.

 

2.

Disconnect white/black wire from contactor termi-

 

Terminal #4

Terminal #0

 

 

nal #0 (terminal #2, on CDS-3 first type contactor)

 

 

 

 

WHI/BLK from Main Harness/

 

 

 

 

and brown/black from terminal #1.

 

Terminal #2

Power Cord/Compressor

 

 

 

 

3. With a voltmeter, check the voltage across the

 

 

 

 

 

white/black wire and the brown/black wire and

Terminal #6

Terminal #1

 

 

the ON/OFF switch in the “ON” position. Connect

BLK from Main

 

 

BRN/BLK from Main

 

the dispenser to the power source. The indication

Harness/Power Cord

 

 

 

Harness/Control Board

 

must be:

 

Terminal #8

 

 

 

a) 120 volts ac for 120 volt models.

 

BLK from Compressor

 

 

 

 

Harness

 

 

 

b) 230 volts ac for 230 volt models.

 

ALL CDS-2 CONTACTORS

 

4.

Disconnect the dispenser from the power

 

 

 

CDS-3 SECOND TYPE CONTACTORS

 

 

source.

 

 

 

 

 

 

 

If voltage is present as described, proceed to #5.

 

 

Terminal #2

 

If voltage is not present as described, refer to the

Terminal #1

WHI/BLK from Main Harness/

Power Cord/Compressor

Wiring Diagram and check the dispenser wiring har-

BRN/BLK from Main

 

 

ness.

Harness/Control Board

Terminal #6

 

 

 

 

5. Check for continuity across contactor terminals

 

 

BLK from Main

 

 

Harness/Power Cord

 

#0 & #1 (#1 & #2, CDS-3 first type contactor).

 

 

 

 

 

 

 

If continuity is present as described reconnect the

 

Terminal #5

 

 

white/black wire and the brown/black wire to the

 

BLK from Compressor

 

 

 

Harness

 

 

contactor and proceed to #6.

 

CDS-3 FIRST TYPE CONTACTORS

 

If continuity is not present as described, replace the

 

 

 

FIG. 22 CONTACTOR TERMINALS

P1333

contactor.

 

34

27646 122200

 

 

 

 

 

 

 

 

 

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Contents CDS-2 CDS-3 Post Office BOX SPRINGFIELD, IllinoisContents Introduction12559.0003 00986.0002 User Notices28720.0000 27443.0000 27664.0000 User NoticesCDSA-2 Only Site preparation Electrical RequirementsAs shown Initial setupHand Each cooling drum seal Place Inside of each auger shaftApproximately Operating Controls Setting Night Time Mode DAY/NIGHT TimerSetting Time Operating ControlsUsing the Dispenser for GRANITA-TYPE Products Using the Dispenser for Cold Liquid ProductsOther Recommendations for Your Dispenser Recommended Daily Cleaning Sugar & Alcohol products Recommended Weekly Cleaning LubricationLubrication DisassemblyAssembly Faucet HandlesAuger assembly & Disassembly Early Augers only Snap it onto the assemblyTroubleshooting Problem Probable Cause RemedyTime Delay Auger Motor won’t turn Auger ON/OFF SwitchesAuger Motor Capacitors Refer to Service Auger Motor Hopper Display Lights not on Circuit BreakerWith adjustment Board L.E.D.s Compressor not running Power cordIng procedures. See With an extension cord. Refer toProblem Probable Cause Problem Become unusual. Auger MotorsService Component AccessAuger Motors Test ProceduresLocation Auger Motor Capacitor Auger Motor CapacitorsAuger Shaft Assembly Auger Shaft AssemblyService Auger Shaft ASSEMBLYcont Auger ON/OFF Switches Volts ac for 120 volt models Volts ac for 230 volt modelsRemove the wires from the circuit breaker Circuit BreakerProperly discharged before proceeding Dispenser chassis Two wire 230 volt modelsConnect the black wire from the compressor Compressor Start Relay Refer to FIG120V Dispensers Refer to a and reconnect the wires Remove run capacitor and discardCompressor & Components CDS-3 Compressor Thermal P1819 Overload Protector LocationRefer to a and reconnect the wires to the compressor Disconnect the fan leads from the main wiring harnessRED from Relay T2 WHI from Relay T4 BLK from Relay T-5 Compressor Relay Terminals Contactor Electronic Control Symptoms Cooling Drum AlignmentDAY/NIGHT Switch Dispenser ON/OFF Switch Dispenser ON/OFF SwitchElectronic Control Electronic ControlUse cable ties to secure wires away from fan blades FANFuse and Fuse Holder Fuse HolderICE/OFF/NO ICE Switches ICE/OFF/NO ICE SwitchesLamp Cord Assy Lamp Cord AssyLamp Cord Connector Upper left side of the auger covers Test ProceduresLamp HOLDER/SOCKET Assembly Inside the hopper coversD./ADJUSTMENT Board E.D./ Adjustment BoardSolenoids SolenoidsTemperature Sensor Temperature SensorTorque Sensor Circuit Board Torque Sensor Circuit Board P1341 LocationTransformer Remove transformer and discardService Voltage DividerCoolant Schematic Diagram CDS-2 Coolant Schematic Diagram CDS-3 Prior to S/N CDSCDS 0019500 Up 27646 27646 Schematic Wiring Diagram for CDS-2 PAF Schematic Wiring Diagram for CDSA-2 PAF 27646 27646 27646
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CDS-3 specifications

The Bunn CDS-3 is a commercial coffee brewer renowned for its reliability, efficiency, and high-quality performance. Designed for busy environments such as cafés, restaurants, and convenience stores, it offers the perfect balance of capacity and functionality, making it ideal for high-demand situations.

One of the standout features of the Bunn CDS-3 is its ability to brew up to 3.8 gallons of coffee per hour. This impressive capacity meets the needs of busy establishments where a constant supply of fresh coffee is crucial. The brewer’s stainless steel construction not only ensures durability but also maintains temperature, thus preserving the coffee’s rich flavor and aroma.

The CDS-3 incorporates Bunn's patented brewing technology, including the "Pour-Over" method. This feature allows for easy operation and contributes to the even extraction of coffee grounds. The machine is equipped with a pre-infusion mode that saturates coffee grounds before brewing, enhancing extraction for a fuller, more complex flavor profile.

Temperature control is another vital characteristic of the Bunn CDS-3. It maintains the water temperature between 195°F to 205°F, the ideal range for optimal coffee brewing. The brewer’s internals are designed for rapid heating, ensuring that the water reaches the desired temperature quickly and consistently, which is essential for high-quality coffee production.

In terms of usability, the Bunn CDS-3 offers an intuitive interface, allowing staff to operate it with minimal training. The front-access design not only simplifies maintenance, but also makes it easy to refill water and perform routine cleaning. Furthermore, the large capacity coffee pots ensure that the brewed coffee can be stored efficiently, minimizing waste.

Equipped with a unique spray head system, the Bunn CDS-3 ensures uniform saturation of the coffee grounds. This feature supports optimal extraction, allowing users to produce a rich and flavorful brew that keeps customers coming back for more.

In summary, the Bunn CDS-3 is a well-engineered, commercial-grade coffee brewer that excels in high-demand environments. Its robust construction, advanced brewing technology, consistent temperature control, and user-friendly design make it a favorite among coffee enthusiasts and professionals alike, affirming its reputation as a reliable and effective solution for coffee brewing needs. Whether for a bustling café or a catering service, the Bunn CDS-3 delivers a consistently great cup of coffee every time.
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