Bunn G9WD-RH service manual Troubleshooting, Problem Probable Cause Remedy

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TROUBLESHOOTING

A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department.

•Inspection, testing and repair of electrical equipment should be performed only by qualified service person- nel.

•All electronic components have 120 volts ac and low voltage dc potential on their terminals. Shorting of terminals or the application of external voltage may result in board failure.

•Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. Of an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a terminal or crimp.

•Make certain that all electrical connections are tight and isolated.

WARNING

•Exercise extreme caution when servicing electrical equipment.

•Turn power OFF when servicing, except when electrical tests are specified.

•Follow recommended service procedures.

•Replace all protective shields or safety notices.

Problem

Probable Cause

Remedy

 

 

Grinder will not start

1.

Motor overload protector

Remove the metal plug located

 

 

 

on the right side of the housing.

 

 

 

Press the red “Reset” button. Lis-

 

 

 

ten carefully for a “click”. This re-

 

 

 

sets the motor protection circuit

 

 

 

and indicates that the motor may

 

 

 

have encountered an overload. (An

 

 

 

overload can occur when some-

 

 

 

thing other than coffee is inserted

 

 

 

into the hopper for grinding)

 

 

2.

No power

Check the voltage at the power cord

 

 

 

with a voltmeter. Voltage must be

 

 

 

120 volts across the black and

 

 

 

white wires.

 

 

 

3. START button

Use

“TEST

SWITCHES?”

menu

 

 

 

under

“SERVICE TOOLS?”

menu

 

 

 

in level 1 functions to test START

 

 

 

button.

 

 

 

4.

Circuit board

Circuit board.

Check that there is

 

 

 

24VDC to the relay coil when the

 

 

 

Start button is pressed.

 

13

41451.0001

111909

 

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Contents G9WD-RH BUNN-O-MATIC Commercial Product Warranty Introduction ContentsUser Notices Operating Controls Electrical RequirementsCoffee Grinding AdjustmentsCleaning Glossary Noyes Switches Enable DisableGround Coffee Counter Batch Size SettingGrinder Scale Calibration Coffee CalibrationModify Show Next Communicating with the GrinderCommunicating with the Grinder Switches Enabl Disable Level 2 Functions Problem Probable Cause Remedy TroubleshootingStart, replace motor Schematic Wiring Diagram G9WD-RH

G9WD-RH specifications

The Bunn G9WD-RH is a premier commercial coffee grinder designed for high-demand environments, such as cafes, restaurants, and coffee shops. Renowned for its efficiency, durability, and consistency, this grinder is an essential piece of equipment for any establishment that values quality coffee.

One of the standout features of the Bunn G9WD-RH is its powerful grinding capabilities. Equipped with a 1.1 horsepower motor, it can easily handle high volumes of coffee beans, making it ideal for busy locations. This grinder operates at a speed of approximately 3,600 RPM, allowing for quick and uniform grinding, which is crucial for achieving optimal flavor extraction.

The G9WD-RH utilizes a unique patented design for its burrs. The burrs are made of high-quality stainless steel and provide a precise grind size that can be easily adjusted. This adjustment can be made on the fly to suit various brewing methods, from espresso to French press, allowing baristas to tailor their grind to the specific needs of each beverage. The grinder has an intuitive control panel that enables users to control grind time accurately, ensuring that the desired amount of coffee is ground each time.

Another notable technology integrated into the Bunn G9WD-RH is its Smart Hopper. This innovative feature allows the grinder to hold up to 1 pound of coffee beans while also providing a built-in grinder activation that stops the grinding process once the hopper is empty. This not only prevents waste but also enhances the overall efficiency of the grinding process.

Durability is a hallmark of the Bunn G9WD-RH, constructed with robust materials that can withstand the rigors of a commercial environment. The unit features a heavy-duty metal housing and a shock-absorbent design that minimizes vibrations, reducing wear and tear over time.

Moreover, the Bunn G9WD-RH is designed for easy maintenance. The grinding chamber can be easily accessed for cleaning, ensuring that the grinder remains sanitary, which is vital for maintaining the quality of the coffee.

In summary, the Bunn G9WD-RH coffee grinder is a reliable and efficient machine that combines advanced technology with practical features, making it an invaluable asset for any coffee-focused business. Its high-performance capabilities paired with user-friendly operations ensure that it stands out in the competitive market of commercial coffee grinders.
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