Bunn System III Troubleshooting Problem, Brew cycle will not start, Overflow protection switch

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TROUBLESHOOTING (cont.)

Problem

Brew cycle will not start (cont.)

Probable Cause

3.ON/OFF switch

4.Start switch

5.Timer

6.Dispense Valve

7.Digital Brewer Control

Remedy

Refer to Service - ON/OFF switch for testing procedures. See page 28

Refer to Service - Start switch for testing procedures. See page 32

Refer to Service - Timer for testing procedures. See page 34 or 35

Refer to Service - Dispense valve for testing procedures. See page 21

Refer to Service - Digital brewer controls for testing procedures. See page 22 step 4

Automatic refill will not operate

1.No water

2.Water strainer/flow control (.500 GPM)

Check plumbing and shut-off valves.

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

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

3.Limit thermostat (Electro/me- chanical and Digital Brewer Control)

4.Overflow protection switch

Refer to Service - Limit thermostat for testing procedures. See page 27

Refer to Service - Overflow protec- tion switch for testing procedures. See page 29

5.(A) Level control board & level probe. (Electro/mechanical)

(B)Digital Brewer Control Assem- bly (DBC)

Refer to Service - Level control board for testing procedures. See page 25

Refer to Service - Digital brewer control for testing procedures. See page 22 step 2

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27362

092900

 

 

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Contents Bunn Warranty User Notices 20201.5600 00831.0000 00656.0000 03408.0000 03409.0000Models with digital brewer control assembly Electrical RequirementsModels with electro/mechanical thermostats Plumbing RequirementsElectro/mechanical brewers Adjusting Brew VolumesInitial SET-UP Cleaning Brew Selector SwitchStart Switch Operating ControlsTroubleshooting Problem Probable Cause RemedyTroubleshooting Problem Overflow protection switchBrew cycle will not start Digital Brewer Control Assem- bly DBCTroubleshooting Problem Probable Cause Remedy Triac assembly DBC Warmer elementSprayhead or airvent Mechanical StepTime adjustment Electro DBC volume adjustmentTimer adjustment Procedures. See page 34 orTroubleshooting Problem Cannot access the DBC Digital brewer control DBC display is blank Digital brewer controlContents ServiceComponent Access Service Bypass ValveService LocationBrew Selector Switch ELECTRO/MECHANICALContactor Assembly ELECTRO/MECHANICAL only Gently remove the capillary bulb and grommet from the tankService Contactor Assembly ELECTRO/MECHANICAL only Contactor Assembly TerminalsTest Procedures Disconnect the brewer from the power source OnlyDispense Valve ElectromechanicalDigital Brewer Control Board and Display DBC TION, Entry and DescriptionService Digital Brewer Control Board and Display DBC TRIAC/HEAT Sink Assembly DBC only TRIAC/HEAT SinkP2231.30 Terminals Limit Thermostat Limit ThermostatService ON/OFF Warmer Switch Black wire from the center terminalThree wire 120/240 volt models ModelsOverflow Protection Switch Test Procedure Disconnect the brewer from the power sourceService Solenoid Valve Refill Refill Solenoid ValveRefill Solenoid Terminals Start Switch Tank Heater LocationTimer ELECTRO/MECHANICAL Onlyearly Models Digital Timer ELECTRO/MECHANICAL only Late Models If voltage is as described, proceed to #7Timer Setting Digital Timer WiringWarmer Element Lower 27362 092900 Lower

System III specifications

The Bunn System III is a versatile and efficient commercial brewing system designed for high-demand environments such as cafés, restaurants, and catering operations. Renowned for its reliability and performance, the System III combines advanced brewing technology with user-friendly features to deliver exceptional coffee consistently.

One of the key features of the Bunn System III is its innovative brewing technology, which employs a unique infuser system. This design allows for optimal extraction of coffee flavors by ensuring that hot water is evenly distributed over the coffee grounds, maximizing flavor and ensuring a rich, balanced cup every time. The brewing system can brew up to 3.8 gallons of coffee per hour, making it an ideal choice for busy establishments.

The System III is equipped with an impressive built-in water heater that maintains a temperature of approximately 200°F, which is crucial for brewing coffee at the ideal temperature. This consistent temperature control minimizes the risk of under-extraction or over-extraction, resulting in better-tasting coffee. Additionally, the hot water faucet feature allows users to brew tea or instant beverages on demand, further enhancing the system's versatility.

Another characteristic that sets the Bunn System III apart is its user-friendly interface. The system is designed with intuitive controls, allowing baristas and kitchen staff to operate it with minimal training. The easy-to-read digital display provides critical information such as brew time and water temperature, ensuring that users can monitor the brewing process closely.

Durability is a hallmark of the Bunn System III. Constructed from high-quality materials, this brewing system is designed to withstand the rigors of commercial use. Its robust design ensures longevity and minimizes the need for frequent maintenance, making it a cost-effective choice for businesses.

The Bunn System III also features a large-capacity brew basket, capable of holding ample coffee grounds for high-volume brewing. This basket, combined with the system's efficient design, allows for quick and easy brewing, making it perfect for high traffic situations.

In conclusion, the Bunn System III coffee brewing system is a top choice for commercial coffee operations. Its advanced brewing technology, consistent temperature control, user-friendly features, and durable construction combine to create an exceptional brewing experience. Whether in a café, restaurant, or catering service, the Bunn System III stands out as an indispensable tool for delivering high-quality coffee efficiently.
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