Bunn TNTF-3 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 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the application of external voltages may result in board failure.

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

•Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are energized for more than ten minutes without a supply of water.

•The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will help to avoid twists and kinks in the tubing.

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

•This brewer is heated at all times. Keep away from combustibles.

WARNING –

•Exercise extreme caution when servicing electrical equipment.

•Unplug the brewer when servicing, except when electrical tests are specified.

•Follow recommended service procedures

•Replace all protective shields or safety notices

Problem

Probable Cause

Brew cycle(s) will not start

1. No water

 

2. No power or incorrect voltage to

 

the brewer

 

3.External Strainer/ Flow Control

 

(.750 GPM)

Remedy

Water lines and valves to the brewer must be open.

Check circuit breakers or fuses.

(A)Direction of flow arrow must be pointing towards the brewer.

(B)Remove the strainer/flow con- trol and check for obstructions. Clear or replace.

4.ICED/OFF/HOT Switch

5.Start Switch

Refer to Service - ICED/OFF/HOT Switch for testing. See page 26

Refer to Service - Start Switch for testing procedures. See page 27

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28201 081500

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Contents Post Office BOX SPRINGFIELD, Illinois Telephone 217 529-6601 FAX 217Introduction ContentsWarranty User Notices #00831.0000 #00656.0000 #03408.0000 #03409.0000Electrical Hook-Up Electrical RequirementsPlumbing Requirements Plumbing Requirements Initial SET-UPAdjusting Brew Volumes Initial SET-UPCleaning ICED/OFF/HOT SwitchStart Switch Operating ControlsRemedy TroubleshootingProblem Probable Cause Troubleshooting ProblemBrew cycles will not start Brew Timer RemedyProblem Probable Cause Remedy Probable Cause Remedy Water flows into tank continuously Brew Timer Or HOT positionPosition Beverage overflows dispenser DispenserRemove and clean lime off the tank heater. See Weak beverage Filter Type Tea Sprayhead Funnel LoadingDry tea leaves remain Funnel Brewer is making unusal noises SolenoidsContents ServiceComponent Access Solenoid valve ServiceBrew Solenoid Valve HOT TEA Brew Solenoid Valve Iced TEA Brew Timer HOT TEA Early Models HOT TEA Brew TimerBrew Timer HOT TEA Late Models If voltage is as described, proceed to #7Service Brew Timer HOT TEA Late MODELScont Digital Timer WiringBrew Timer Iced TEA Early Models Iced TEA Brew Timer Brew Timer Iced TEA Late MODELScont Test Procedures Disconnect the brewer from the power source Control ThermostatTest Procedure Disconnect the brewer from the power source Dilution Solenoid ValveLimit Thermostat Limit ThermostatICED/OFF/HOT Switch ICED/OFF/HOT SwitchStart Switch Start SwitchEls Tank HeaterIndication must be Service Thermal Fuse Models W/Faucet Only Thermal Fuse28201
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TNTF-3 specifications

The Bunn TNTF-3 is a high-performance coffee brewer designed for commercial use, specifically suited for busy environments such as restaurants and cafes. This machine seamlessly combines efficiency with quality, making it a popular choice for professionals who demand the best in their equipment.

One of the standout features of the Bunn TNTF-3 is its three warmer plates, which allow users to brew and store multiple batches of coffee simultaneously. This design ensures that there’s always fresh coffee ready for customers, minimizing downtime during peak service hours. Each warmer has its own independent control, providing versatility in temperature settings to accommodate different coffee types and customer preferences.

The Bunn TNTF-3 utilizes a patented SplashGard funnel that helps to keep the brewing process clean and efficient. This technology not only prevents splashes and messes but also improves user safety by protecting operators from hot water and coffee spills. The brewer’s stainless steel construction contributes to its durability, enhancing its longevity in a high-volume setting.

In terms of brewing capabilities, the TNTF-3 can prepare up to 3.8 gallons of coffee per hour, making it ideal for both small and large operations. The machine is equipped with a brew control feature that allows users to customize the strength and flavor of the coffee, ensuring that each cup meets the highest standards. Additionally, the digital timer and brew status light offer convenient monitoring at a glance.

For ease of maintenance, the Bunn TNTF-3 is designed with accessibility in mind. With removable components and straightforward cleaning procedures, operators can keep the machine in top condition without significant downtime. The brewer also features a low-water shut-off system, which helps to protect the unit from damage due to insufficient water levels.

Overall, the Bunn TNTF-3 embodies a blend of innovative technology, practical design, and optimal performance, making it a powerful tool for coffee professionals. Whether it be for daily service or special events, the Bunn TNTF-3 stands out as a reliable coffee brewing solution that consistently delivers rich, flavorful coffee with every batch. Its combination of speed, safety, and quality assurance solidifies its status as a preferred choice in commercial settings.
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