Bunn S/N 0005473 & UP Step-down transformer, Fault codes, Former, Replace control board, Ting

Page 26

TROUBLESHOOTING (cont.)

 

 

PROBLEM

PROBABLE CAUSE

REMEDY

Unit is not working and no beep/light

1. Step-down transformer.

Check for 120/24 vac. If no 24vac

fault codes

 

reading, replace step-down trans-

 

 

former.

 

2. Main control board.

If 24 vac present and no red LED,

 

 

replace control board..

 

 

Hint: Red LED on main control board

 

 

is powered from the step-down

 

 

transformer 24 vac and rectified to

 

 

24 vdc by the rectifier.

Difficulty brixing and/or weak bev-

1. Product viscosity or too cold.

Thorough thaw of product before

erage

 

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) Perform 3 second water dispense

 

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 (RPM) to achieve brix %.

 

5. Brix ratio.

Check for proper brix ratio per prod-

 

 

uct using Total Dispense method

 

 

and or refractometer method.

26

38218.1 030306

 

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Contents JDF-4 Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Contents User NoticesCE Requirements Initial SET-UPElectrical Requirements Electrical HOOK-UPPlumbing Connections Plumbing RequirementsPlumbing Hookup Operating Controls Refrigeration SwitchSanitize Switch Water Bath ValveOperating Controls Frozen Concentrates Initial FillLoading Priming Dispenser USEInitial Fill Ambient Concentrates Optional Press and Hold Models Refer to FigWeekly Sanitizing Cleaning & Preventive MaintenanceDaily Parts Washing Cleaning Cleaning Monthly Clean Condenser Air Filter Annually Replace Pump TubingTemperature Compensated Refractometer Method Adjustment & Optional SettingsTotal Dispense Ratio Set Up Procedure Per 3-second test Mix RatioProduct Brix % Pump Speed ProgrammingCup Size Programming Portion Control Dispensers Only Adjustment & Optional SettingsChilled Water Flow Testing and Adjustment Dispenser LockoutService Lockout Adjustment & Optional Settings Password Protection Cooling Fault List Dispense Fault ListBeeper Fault DBC display FaultControls Off Dip Switch Function ListRefill indicator when concentrate out is detected Audio feedback during dispensesFunction List 104 Set Pump 4 RPM Concentrate BCold Water Circulation TroubleshootingProblem Probable CauseRefrigeration TroubleshootingProblem Probable Cause Remedy Dispenser Locked OutBottle adapter switch mem- brane Dispense/Rinse switch mem- brane open simultaneouslyConcentrate only Water onlyPassword Initial fill/setupCant access programming Programming password feature Nect fittingsOnce water is set, adjust motor Fault codesIs powered from the step-down Step-down transformerStation Problem Probable CauseDifficulty brixing and/or weak bev Pump tubing Erage Use of portable water pumpCoolant Schematic Diagram Schematic Wiring Diagram Schematic Wiring Diagram JDF-4 Dispense Deck Circuit Schematic Wiring Diagram JDF-4 Control Panel Circuit GND L1 N

S/N 0005473 & UP specifications

The Bunn S/N 0005473 & UP is a remarkable coffee brewing system that blends innovative technology with user-friendly features, catering to both commercial and home brewing needs. Known for its durability and reliability, this model has garnered acclaim among coffee enthusiasts and professionals alike.

One of the standout features of the Bunn S/N 0005473 & UP is its rapid brew technology. This system enables the brewing of high-quality coffee in less time than conventional methods. With a typical brewing cycle of just a few minutes, users can enjoy fresh coffee quickly, making it an ideal choice for busy environments like cafes, restaurants, and offices.

In terms of capacity, this Bunn model is equipped with a generous water reservoir that can hold several gallons, allowing for multiple brewing cycles without the need for constant refilling. This is particularly beneficial in high-demand settings where speed and efficiency are paramount. Furthermore, the system is designed to accommodate a variety of coffee types, from standard drip to specialty blends, providing versatility for users.

The Bunn S/N 0005473 & UP also features an adjustable brewing temperature, ensuring that the coffee is brewed at the optimal heat for extraction. This capability plays a crucial role in achieving the perfect flavor profile, allowing users to experiment with different beans and roasts.

Another notable characteristic of this model is its user-friendly interface. The intuitive controls enable both novice and experienced users to operate the machine with ease, reducing the learning curve associated with brewing great coffee. Additionally, maintenance is simplified with removable components that can be easily cleaned, promoting longevity and consistent performance.

Energy efficiency is also a key consideration in the design of the Bunn S/N 0005473 & UP. With a focus on reducing power consumption, this coffee maker operates discreetly in the background while remaining ready to brew at a moment’s notice.

Overall, the Bunn S/N 0005473 & UP stands out as a reliable and efficient coffee brewing system. With its combination of rapid brew technology, adjustable temperature settings, and user-friendly design, it caters to a wide range of coffee preferences and environments, ensuring that every cup is a delightful experience. This model continues to be a favorite among both casual drinkers and coffee connoisseurs.
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