Bunn HC-2 HC-3 service manual Troubleshooting, Problem Probable Cause Remedy

Page 7

TROUBLESHOOTING (cont.)

 

 

PROBLEM

PROBABLE CAUSE

REMEDY

Product will not dispense

1. No water

Water lines and valves to the

 

 

dispenser must be open.

 

2. No power or incorrect voltage to

(A1) Check the terminal block for

 

the dispenser

120 volts across the black and

 

 

white terminals on two wire 120

 

 

volt dispenser.

 

 

(A2) Check the terminal block for

 

 

120 volts across the red and

 

 

white terminal and the black and

 

 

white terminal on three wire

 

 

120/240 volt dispenser.

 

 

(A3) Check the terminal block for

 

 

240 volts across the white and

 

 

black terminal on two wire 240

 

 

volt dispenser.

 

 

(B) Check circuit breakers or

 

 

fuses.

 

3. Dispense switch

Refer to Service - Dispense

 

 

Switch for testing procedure.

 

 

See page 18

 

4. Dispense solenoid valve

Refer to Service - Dispense

 

(Hot or Cold)

solenoid valve for testing proce-

 

 

dures. See page 30 or 31

 

5. Solenoid valve (Inlet)

Refer to Service - Solenoid Valve

 

 

(Inlet) for testing procedures.

 

 

See page 32

 

6. Level control board and probe

Refer to Service - Level Control

 

 

Board and Probe for testing

 

 

procedures. See page 26

 

7. Overflow protection switch

Refer to Service - Overflow

 

 

protection switch for testing

 

 

procedures. See page 28

 

8. Auger drive

Refer to Service - Auger Drive.

 

 

See page 12

7

27591 031597

 

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Contents Serial # HC00025000 UP BUNNHC-2Introduction Warranty12368.0002 User Notices27620.0000 Plumbing Requirements Initial SET-UPElectrical Requirements Electrical HOOK-UPCold Beverage SET-UP Optional CleaningAdjustments Dispenser USEDraining the HOT Water Tank TroubleshootingHopper Dispense Rate of Product Problem Probable Cause Remedy TroubleshootingProblem Ing in serious leaks Problem Probable CauseDripping from dispense tip Lime build-up On stainless steel surfaces canTip with a thermometer Weak product Water temperatureTesting procedure. See 30 orProbable Cause Remedy Troubleshooting ProblemAuger Drive Components ServiceComponent Access ContentsHopper Assy Auger Drive ComponentsIf voltage is present as described, proceed to #5 Washer Auger Motor Locknut Dust Seal Shoulder ScrewRight HC-2 ServiceBallast Test ProcedureLocation Electronic Thermostat Optional Remove temperature probe from the tankControl Thermostat Location Mechanical ThermostatThermostat Terminals Control ThermostatDispense Switch Dispense SwitchFAN Test ProceduresPull the mixing chamber 2 out of the whipper chamber Frother and Whipper MotorSteam Collector #6-32 Screw Mixing Chamber RingWhipper Motor Terminals Frother and Whipper MotorReconnect the eight pin connector to the hopper delay board Hopper Delay BoardDisconnect the wires from the switch termi- nals HOT/COLD Switch OptionalLamp Holder Lamp Replacement Refer to FigDoor Assy Service Level Control Board and Probe Level Control Board and Level ProbeLimit Thermostat Level Board TerminalsOverflow Protection Switch Overflow Protection SwitchRUN/RINSE Switch RUN/RINSE SwitchCold Water Solenoid Valve Solenoid Valve Cold Water OptionalSolenoid Valves Dispense Cold Water Solenoid TerminalsDisconnect the water line from the solenoid valve Solenoid Valves DispenseSolenoid Valve Inlet Tank Heater Solenoid Valve InletTank Heater Switch Refer to when reconnecting the wires to the tank heaterTank Heater Tank Heater Switch Terminals Tank Heater SwitchMODELSONLYcont Transformer 240V TWO WireSchematic Wiring Diagram HC-2, & HC-3 Schematic Wiring Diagram HCA-2, & HCA-3

HC-2 HC-3 specifications

The Bunn HC-2 and HC-3 are high-performance commercial coffee brewers designed for cafes, restaurants, and institutions that prioritize quality, efficiency, and reliability. Renowned for their exceptional brewing capabilities, both models come with a range of features that cater to the demanding needs of coffee enthusiasts and professionals alike.

One of the core characteristics of the Bunn HC-2 and HC-3 is their brewing technology. These machines utilize a patented steeping mechanism that allows for optimal water temperature and contact time, extracting the finest flavors from the coffee grounds. The precise temperature control, maintained at a consistent level, ensures that every cup of coffee is brewed to perfection. Furthermore, the machines have an impressive brew capacity, with the HC-2 capable of brewing up to 3.8 gallons per hour, while the HC-3 can brew up to 5.3 gallons per hour, making them ideal for high-traffic environments.

Another significant feature of the Bunn HC-2 and HC-3 is their ease of use. The user-friendly interface allows baristas to quickly set brew cycles and adjust brewing parameters to suit different coffee types. Both models are designed with a sleek, ergonomic aesthetic that fits seamlessly into any workspace, while also being built with durable materials to withstand the rigors of daily use.

In terms of efficiency, these brewers come equipped with energy-saving technology. The automatic warmers on both machines adjust the heat output based on the coffee’s temperature, reducing energy consumption without compromising quality. Additionally, the compact design of these units means they occupy minimal counter space, making them suitable for both small and large establishments.

Maintenance is straightforward with the Bunn HC-2 and HC-3, as they feature a self-diagnostic system that alerts users to any potential issues. This feature minimizes downtime and ensures the longevity of the equipment. Furthermore, the brewing components can be easily accessed for cleaning and maintenance.

In summary, the Bunn HC-2 and HC-3 stand out in the commercial coffee brewing market with their advanced brewing technology, high capacity, user-friendly design, energy efficiency, and ease of maintenance. These features make them a preferred choice for anyone looking to deliver high-quality coffee consistently, ensuring that businesses can satisfy even the most discerning coffee drinkers. With Bunn’s commitment to innovation and quality, these brewers continue to set the standard in the coffee equipment industry.
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