Bunn SRUA service manual Liquid Level Board and Level Probe

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SERVICE (cont.)

LIQUID LEVEL BOARD AND LEVEL PROBE

FIG.10 LIQUID LEVEL BOARD AND

P2116.40

 

LEVEL PROBE

 

Location:

The liquid level board is located behind the lower front access panel, to the right of center on the component bracket. The level probe is located on the right front of the upper component bracket.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Disconnect the blue wire (T1) and the pink wire (T4).

3.Check for 230 volts ac across terminals (T2) and (T3) with the ON/OFF switch in the "ON" position.

4.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #5.

If voltage is not present as described, refer to wiring diagram and check the brewer wiring harness.

5.Reconnect the blue wire to T1 on the liquid level board.

6.Carefully connect a piece of insulated jumper wire to T4. Keep the other end of this wire away from any metal surface of the brewer.

7.Touching the free end of the jumper to the brewer's frame simulates a "FULL" condition, preventing jumper from touching the brewer's frame simu- lates "NEED WATER" condition. Connect the brewer to the power source, simulate each condition while measuring the voltage between T1 and T3 on the liquid level board. The indication should be 0 volts with jumper touching the frame and 230 volts ac not touching the frame. Repeat these several times. Keep in mind there is an approximate five second delay for output to stabilize.

8.Disconnect the brewer from the power source and remove the jumper wire from T4.

If voltage is present as described, liquid level board is operating properly, proceed to #9.

If voltage is not present as described, replace the liquid level board.

9.Reconnect the pink wire to T4.

10.Remove the two #8-32 screws securing the level probe to the component bracket.

11.Gently pull the probe out of the component bracket and inspect for corrosion. Replace if necessary.

12.Place the probe so that neither end is in contact with any metal surface of the brewer.

13.Connect the brewer to the power source and simulte the "FULL" and "NEED WATER" conditions by touching the end of the probe to any metal surface of the brewer. Measure the voltage be- tween T1 and T3 on the liquid level board. The indication should be 0 volts with the probe touch- ing the frame and 230 volts ac not touching the frame. Keep in mind there is an approximate delay of five seconds for output to stabilize.

14.Disconnect the brewer from the power source.

If voltage is present as described, reinstall the level probe, the liquid level board and level probe are operating properly.

If voltage is not present as described, check the pink wire on the level probe from liquid level board T4.

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10067.3 070102

 

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Contents Bunn Srua Post Office BOX SPRINGFIELD, IllinoisBUNN-O-MATIC Commercial Product Warranty IntroductionUser Notices Electrical Installation Instructions Electrical RequirementsPlumbing Requirements Initial Setup Plumbing Hook-upAdjusting Brew Volumes Cleaning Coffee BrewingFilter Holder Troubleshooting Problem Probable CauseRemedy Problem Brew cycle will not start Tank not fillingDirection of flow arrow must be pointing towards brewer Problem Probable Cause Remedy Funnel overflows Filters Refer to Service Solenoid Valve for testing procedures. SeePump tubing StructedRemove and clean lime off the tank heater. See Coffee reservoir overflows Brewer is making unusal noisesService Component AccessBLK Thermal Block L1 Fuse to Tank Heater RED Thermal Fuse ContactorLocation ThermostatDisconnect the red wires from the control thermo- stat Control ThermostatFuse and Fuse Holder Fuse and Fuse HolderLimit Thermostat Limit ThermostatLiquid Level Board and Level Probe Liquid Level BoardService Liquid Level Board and Level Probe ON/OFF Switch Disconnect all wires on the ON/OFF switchRED to Start Switch, Brew Pump Assembly Pump AssemblySelector Switch Half Batch Option Selector Switch Half BatchSolenoid SolenoidStart Switch Brew LocationSwing ARM Switch Swing ARM SwitchTank Heater Tank HeaterThermal Fuses Thermal FusesTimer Service Digital Brew Timer Late Models If voltage is as described, proceed to #7Digital Timer Terminals 10491.0004A 07/02 2002 BUNN-O-MATIC Corporation

SRUA specifications

The Bunn SRUA is an innovative coffee brewer that is designed to meet the needs of commercial environments, like restaurants, cafes, and office breakrooms. This machine is known for its efficiency, reliability, and exceptional brewing quality. The SRUA model is particularly popular for its ability to produce consistently great-tasting coffee with minimal effort.

One of the standout features of the Bunn SRUA is its unique brewing technology. The machine is equipped with a patented brewing system that allows for precise control over temperature and brewing time. This ensures that the coffee is brewed at the optimal temperature, extracting the maximum flavor from the coffee grounds. The SRUA also features a hot water faucet that provides instant hot water for tea or other beverages, enhancing versatility in beverage options.

The Bunn SRUA has a large capacity, able to brew multiple pots of coffee quickly. It can produce up to 3.8 gallons of coffee per hour, making it ideal for high-demand settings. The brewer has a built-in water tank that maintains the right temperature at all times, reducing wait times and allowing for quick service during busy hours.

In terms of design, the SRUA is built to withstand the rigors of daily use in commercial settings. It features high-quality stainless steel construction, ensuring durability and longevity. Additionally, the machine is relatively compact, allowing it to fit on countertops with limited space while still providing high-volume output. The user-friendly interface and clear indicator lights make operating the machine straightforward, even for staff with minimal training.

Moreover, the Bunn SRUA emphasizes easy maintenance. The machine comes with a removable brew basket and a stainless steel funnel that simplify cleaning and prevent residue buildup. Regular maintenance is streamlined, helping to keep the brewer functioning at peak performance.

Security features are also integrated into the Bunn SRUA, with options for water line connection and manual fill capabilities, allowing users to choose the most convenient setup for their needs.

In summary, the Bunn SRUA is a powerful, efficient, and durable commercial coffee brewing solution that delivers exceptional performance and versatility, making it an excellent choice for businesses that prioritize quality and service.
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