Bunn AF PR-3 service manual Circuit Board

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SERVICE

CIRCUIT BOARD

 

O

 

O

 

O

FIG. 2 CIRCUIT BOARD

P1556

 

Location:

The circuit board is located inside the autofill box, mounted on the right side of the vacuum switch mounting.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the ten pin plug on the main wiring harness from the connector on the circuit board.

3.Check the voltage across the black wire(#3) and the white wire (#6) with a voltmeter. Connect the dispenser to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models.

b)200 to 240 volts ac for two wire 200 or 240 volt models.

If voltage is present as described, replace the circuit board.

If voltage is not present as described, refer to the wiring diagrams and check the main wiring harness.

Removal and Replacement:

1.Disconnect the ten pin plug from the main wiring harness to the circuit board.

2.Remove the six #4-40 screws and spacers securing the circuit board to the solenoid mounting bracket. Remove circuit board and discard.

3.Install new circuit board using #4-40 screws and spacers to secure the circuit board to the vacuum switch mounting bracket. The spacers must be between the solenoid mounting bracket and the circuit board.

4.Refer to Fig. 3 for circuit board ten pin connector.

P1528

FIG. 3 CIRCUIT BOARD CONNECTOR LOCATION

8

28791.1 011500

 

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Contents Bunn AF PR-2 AF PR-3 User Notices WarrantyIntroduction Electrical Hook-Up Initial SET-UPElectrical Requirements Recommended Weekly Cleaning CleaningTroubleshooting Probe Control BOX LOW/OFF/HIGH Main Power ON/OFFRefill Circuit ON/OFF Troubleshooting Problem Probable Cause RemedyService Component AccessCircuit Board Circuit BoardFuse and Fuse Holder Fuse HolderService Main ON/OFF SwitchRefer to when reconnecting the wires Probe SystemRefill Switches #3 AFPR-3 onlyVACUUM/SUPPLY Pump Assembly VACUUM/SUPPLY Pump AssemblyVACUUM/SUPPLY Pump Tube Installation Head cavityVacuum Switches #3#128791.1 28791.1

AF PR-3 specifications

The Bunn AF PR-3 is a high-performance coffee brewer designed for commercial use, particularly in cafés, restaurants, and other settings where quality coffee must be brewed quickly and efficiently. Known for its exceptional reliability and innovative features, the Bunn AF PR-3 has become a popular choice among coffee professionals.

One of the standout features of the AF PR-3 is its ability to brew up to 3 gallons of coffee per hour. This capacity makes it ideal for busy environments where a quick turnaround is essential. The brewer uses a patented technology that ensures optimal brewing temperature and extraction time, resulting in a rich, full-bodied flavor profile in each cup.

Another significant aspect of the Bunn AF PR-3 is its automatic features. With a programmable digital display, users can easily select brew settings and adjust individual preferences. This user-friendly interface simplifies operation and allows baristas to focus on crafting the perfect coffee every time. The unit also comes with a built-in hot water faucet that enables the brewing of other beverages, such as tea or instant soups, further enhancing its versatility.

Additionally, the Bunn AF PR-3 incorporates advanced brewing technology, including its unique "infusion" brews system. This system allows water to saturate coffee grounds evenly, promoting even extraction. As a result, the coffee brewed with the AF PR-3 exhibits a well-balanced taste with vibrant aroma, catering to the sophisticated palate of coffee aficionados.

Durability is another characteristic of the Bunn AF PR-3. The brewer is built with high-quality stainless steel, making it resistant to wear and tear, and ensuring that it can withstand the demands of a bustling café environment. The machine's components are designed for easy maintenance, allowing operators to clean and service the brewer with minimal downtime.

Moreover, the Bunn AF PR-3 is energy efficient, designed to reduce energy consumption without compromising performance. This feature not only helps in keeping operational costs down but also makes it an environmentally friendly choice for coffee businesses.

In conclusion, the Bunn AF PR-3 is a leading coffee brewer that combines speed, quality, and user-friendly technology, making it an essential piece of equipment for any commercial coffee establishment. Its ability to brew large quantities of rich, flavorful coffee efficiently, along with its durability and ease of operation, solidifies its position as a top contender in the coffee brewing market.
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