Bunn U3A service manual Refer to Service Circuit Breaker for testing procedures. See

Page 11

TROUBLESHOOTING (cont.)

PROBLEM

Water not hot

Circuit breaker keeps tripping

Water keeps running from swing spout

Inconsistent coffee yield

Funnels overflow

PROBABLE CAUSE

1. Limit Thermostat

CAUTION - Do not eliminate or bypass limit thermostat. Use only Bunn-O-Matic replacement part #29329.1000

2.Control Thermostat

3.Tank Heater(s)

4.Contactor

1.Circuit Breaker

2.Tank Heater(s)

1.Timer

2.Start Switch

1.Timer

2.Solenoid Valve

3.Lime build-up in swing spout and pump tubing.

1.Filters

2.Hole in bottom of funnel ob- structed.

REMEDY

Refer to Service - Limit Thermo- stat for testing procedures. See page19

Refer to Service - Control Ther- mostat for testing procedures. See page 17

Refer to Service - Tank Heater for testing procedures. See page 30

Refer to Service - Contactor for testing procedures. See page 15

Refer to Service - Circuit Breaker for testing procedures. See page 14

Refer to Service - Tank Heater for testing procedures. See page 30

Refer to Service - Timer for testing procedures. See page 31 or 33

Refer to Service - Start Switch for testing procedures. See page 29

Refer to Service - Timer for testing procedures. See page 31 or 33

Refer to Service - Solenoid Valve for testing procedures. See page 27

Remove swing spout and insert deliming rod down into pump tubing as far as possible.

Use Bunn® filters made for the U3 brewer.

Remove obstruction.

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10060

080900

 

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Contents Phone 217 529-6601 FAX 217 U3ABUNN-O-MATIC Commercial Product Warranty User Notices IntroductionElectrical Requirements Electrical Installation InstructionsPlumbing Requirements Initial SetupCE Requirements Adjusting Brew Volumes Initial SetupFilter Holder CleaningCoffee Brewing Brewer TroubleshootingProblem Probable Cause Brew cycle will not start No waterTroubleshooting Remedy ProblemUse Bunn filters made for the U3 brewer Remove obstruction Refer to Service Circuit Breaker for testing procedures. SeeRemove and clean lime off the tank heater. See Contents ServiceComponent Access Location ServiceWire Models and 440V Four Wire Models Contactor ContactorService Contactor Control Thermostat Fuse and Fuse Hilder Limit thermostat Limit ThermostatJumper Not Touching Reconnect the blue wire to T1 on the liquid level boardLiquid Level Board and Level Probe Model VoltageLiquid Level Board Terminals BLK from Main Harness RED to Main Harness ON/OFF SwitchTest Procedures Disconnect the brewer from the power source Pump Assembly Pump AssemblyIf voltage is present as described, proceed to #3 Relay Brewers W/BREW LockoutBLU to Start Switch BLU from Brew Timer Removal and Replacement Disconnect the wires from the relayRefer to and reconnect the wires BLU from Start Switch Brew TimerSelector Switch Half BATCHP1317.30 Selector Switch Half Batch OptionSolenoid SolenoidEarly Models Start Switch Brew Start Switch BrewTank Heater Tank HeatersThermal Fuses 230V-CE Models only Timer Early ModelsHarness BLK to Pump Lead WHI to Pump Lead Service Timer Early ModelscontDisconnect the black and white wires to the pump If voltage is present as described, proceed to #8If voltage is as described, proceed to #7 Service Digital Timer Late ModelsAdjust the timer as described below Timer Setting Digital Timer Terminals Remove the transformer and discard TransformerMaster ON/OFF Switch LOC Service Master ON/OFF Switch Late Models120/208 Volts AC 120/240 Volts AC 3 Wire + GND Single Phase 10060 080900 10060 080900 Schematic Wiring Diagram U3A CE Schematic Wiring Diagram U3833 Schematic Wiring Digram U3833

U3A, U3 specifications

Bunn U3A, also known as Bunn's U3A, is a unique and innovative approach to education that caters specifically to retirees and senior citizens. The primary aim of this initiative is to foster lifelong learning and social engagement among older adults, empowering them to explore various subjects of interest and connect with like-minded individuals.

One of the main features of Bunn U3A is its diverse range of courses and activities. From art and music appreciation to digital literacy and gardening, participants can choose from a variety of subjects that pique their interest. This broad curriculum is designed to cater to varied backgrounds and skill levels, ensuring that everyone finds something that resonates with them. The courses are typically led by volunteer tutors, many of whom are retired professionals passionate about sharing their knowledge and experiences.

Another characteristic of Bunn U3A is its strong emphasis on community and socialization. By providing a supportive and welcoming environment, members are encouraged to interact, collaborate, and form friendships. The organization often hosts events, workshops, and excursions, further enhancing the sense of belonging and camaraderie among participants. This communal aspect is crucial for combating feelings of isolation that can sometimes accompany retirement.

Bunn U3A leverages technology to enhance the learning experience. Many courses integrate digital tools and online platforms, enabling participants to access resources and engage in discussions beyond the classroom. This tech-savvy approach ensures that members are equipped with essential skills that are increasingly relevant in today’s digital world. As a result, participants often find themselves not only enriching their knowledge but also enhancing their technological proficiency.

In addition to its educational offerings and community focus, Bunn U3A promotes a culture of inclusivity. Everyone, regardless of previous academic background, is welcomed to join, emphasizing that learning is a lifelong journey. The philosophy that underpins Bunn U3A is one of empowerment, with a commitment to ensuring that older adults continue to thrive intellectually, socially, and emotionally.

In summary, Bunn U3A stands out as a vibrant learning community that prioritizes the educational and social needs of retirees. With its diverse courses, strong community bonds, and integration of technology, it serves as a model for how organizations can successfully promote lifelong learning and engagement among older individuals, enriching their lives in meaningful ways.