Bunn TB3Q-LP service manual Troubleshooting, Problem, Probable Cause, Remedy

Page 11

TROUBLESHOOTING (cont.)

PROBLEM

Brew cycle will not start (cont.)

PROBABLE CAUSE

6.Brew Timer

7.Brew Solenoid Valve

REMEDY

Refer to Service - Brew Timer for testing procedures. See page 17

Refer to Service - Brew Solenoid Valve for testing procedures. See page 16

Water is not hot

1. Limit Thermostat

Refer to Service - Limit Thermostat

CAUTION - Do not eliminate or by-

for testing procedures. See page

pass limit thermostat or thermal

20.

cut-off. Use only BOM replacement

 

part #29329.0001

 

2. Control Thermostat

Refer to Service - Control Thermo-

 

stat for testing procedures. See

 

page 19

Dilution cycle will not start

Inconsistent beverage level in dispenser

3.Tank Heater

1.ON/OFF

2.Start Switch

1.Syphon System

2. Lime Build-up

CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water condi- tions. Excessive mineral build-up on stainless steel surfaces can ini- tiate corrosive reactions resulting in serious leaks.

Refer to Service - Tank Heater for testing procedures. See page 25

Refer to Service - ON/OFF Switch for testing. See page 21

Refer to Service - Start Switch for testing procedures. See page 22.

The brewer must be level or slightly lower in front to syphon properly

Inspect the tank assembly for ex- cessive lime deposits. Delime as required.

3. Water Pressure

The water pressure to the brewer

 

must be at least 20 psi (138 kPa).

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Contents Phone 217 529-6601 FAX 217 TB3Q TB3Q-LPIntroduction ContentsBUNN-O-MATIC Commercial Product Warranty #32540.0000 User Notices#37881.0000 #06064.0000Electrical Hook-Up Electrical RequirementsPlumbing Requirements Proceed as followsCentrate Machines will Yield only 76 OZ Initial SET-UPAuto Sweetener SET-UP Adjusting Brew Volumes Operating Controls CleaningAuto Sweetener Cleaning TEA Brewing Problem Probable Cause Remedy TroubleshootingRemedy TroubleshootingProblem Probable CauseSure it is not out of product Drip-out time too long Funnel TipTicles clogging the drip-out tip Sweetener is not working Sweetener box is emptyBeverage overflows dispenser Brew Solenoid Valve Brew TimerDripping from sprayhead Syphon System Lime Build-upProblem Probable Cause Remedy Component Access ServiceSolenoid valve ServiceTest Procedures Disconnect the brewer from the power source Brew Solenoid ValveIf voltage is as described, proceed to #7 Digital Brew TimerDigital Timer Wiring Service Digital Brew TimerControl Thermostat Control ThermostatLimit Thermostat Remove the blue/black wire from the limit ther- mostatOn the switch terminal ON/OFF SwitchRefer to when reconnecting the wires Location Switch terminalsStart Switch Start SwitchUNSWEET/OFF/SWEET Switch Sweetner Option Sweetner Solenoid Valve Sweetner Solenoid ValveTank Heater Volts AC Volts AC Wire Single PhaseSchematic Wiring Diagram TB3QA
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TB3Q, TB3Q-LP specifications

The Bunn TB6Q, TB3-LP, TB6, TB3Q, and TB3Q-LP coffee brewers are a popular series of commercial machines designed for high efficiency and optimal performance in busy environments such as cafes, restaurants, and offices. These machines are crafted with a focus on quality, dependability, and advanced brewing technology to deliver a superior coffee experience.

One of the standout features across the Bunn TB series is the ability to brew large quantities of coffee quickly. The TB6Q, for instance, can brew up to 6 gallons of coffee per hour. This high volume brewing capability ensures that establishments can keep up with demand, especially during peak hours. Additionally, the machines come with a unique design that incorporates a pre-infusion feature, allowing for the coffee grounds to be evenly saturated before brewing begins, enhancing the flavor extraction process.

The TB3-LP model is designed for low-profile applications where counter space may be limited. Despite its compact design, it still offers impressive performance, brewing up to 3.8 gallons per hour. The low-profile feature makes it an ideal choice for settings that require efficiency and space optimization without compromising on the quality of the brew.

Another notable member of the series, the TB3Q and TB3Q-LP, feature a quick brew ratio, allowing users to brew up to 3 gallons of coffee in just a few minutes. These models are equipped with easy-to-use controls for simplified operation, making them perfect for staff training and user accessibility.

All models in the TB series include a hot water faucet, allowing users to dispense hot water for tea or other hot beverages quickly. This versatility adds significant value, especially in multi-beverage settings.

Regarding durability, the Bunn TB series is constructed with high-quality materials, ensuring longevity and reliability. The machines also feature internal components that are easy to access for maintenance, thus reducing downtime and improving the overall efficiency of the machine.

In terms of technology, these brewers often incorporate advanced diagnostics to promptly identify service needs or issues. The machines come with a precise brewing temperature control system that ensures each cup is brewed at the optimal temperature for maximum flavor extraction.

Overall, Bunn's TB6Q, TB3-LP, TB6, TB3Q, and TB3Q-LP coffee brewers represent the culmination of advanced brewing technology and practical design for commercial coffee solutions. Their efficiency, quality, and ease of use make them a staple in many establishments, solidifying Bunn's reputation as a leader in the coffee brewing industry.