Bunn DV, H5X, H5E service manual Replace the electronic control board

Page 11

SERVICE (cont.)

Electronic Controls (cont.)

If voltage was present as described, the temperature control of the system is operating properly.

If voltage was not present as described, contact Bunn-O-Matic to order an electronic control board and temperature sensor for evaluation and proceed to #9.

6.Replace the electronic control board.

7.Check the voltage across the tank heater terminals with a voltmeter. Connect the dispenser to the power source. The indication must be:

a.) 100 to 120 volts ac for 100 to 120 volt models or

b.) 200 to 240 volts ac for 200 to 240 volt models or

c.) 230 volts ac for 230 volt models

8.Disconnect the dispenser from the power source.

If voltage was present as described, the temperature control of the system is operating properly. Return the new electronic control board or temperature sensor to Bunn-O-Matic for credit.

BLU to Tank Heater

WHI/VIO to

Terminal Block

J3 PNK & GRY to

Heater Indicator

Refill Indicator

Power Indicator

Ready Indicator

T5 PNK to Liquid Level Probe

T4 WHI or RED to Terminal Block

T3 BLK to Overflow Safety Switch

T2 GRN or GRN/YEL to Chassis Ground

T1 WHI/BLU to Solenoid

J5 GRY & GRY toTherm-

istor (H5X only)

J4 BLK & WHI to Temperature Sensor

Electronic Controls Removal and Replacement

1.Remove all wires from the electronic control board terminals.

2.Remove the six 6-32 screws holding the electronic control board to the component bracket.

3.Disconnect the temperature sensor, overflow tube temperature sensor, and indicator wires from the electronic control board.

4.Attach the temperature sensor, overflow tube temperature sensor, and indicator wires to the electronic control assembly.

5.Fasten the new electronic control board to its bracket.

6.Refer to Fig 2 when reconnecting the wires.

7.Review the initial set-up procedures on page 6.

FIG. 11a WIRING CONNECTIONS

Adjustments

The H5X/H10X dispensers hold the water tempera- ture at the threshold of boiling. It is not adjustable by the user.

The H5E dispenser is factory calibrated for the temperature specified on the data plate. If adjustment is required, use the following procedure:

1.Fill the dispenser according to the steps in the Initial Set-up.

2.Take the temperature of the stream of water im- mediately below the faucet as it flows from the dispenser with an accurate thermometer. Do not take the temperature of water collected in a con- tainer.

3.If any adjustment is required, refer to LEVEL 1 PROGRAMMING in the Operating Manual.

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Contents Phone 217 529-6601 FAX 217 H10X/H5X H5E/DV PC H5 ElementBUNN-O-MATIC Commercial Product Warranty Contents Remedy Fault CodesProblem Flashes Description of FailureProblem Probable Cause Remedy Deposits. Delime as required Water boils continuously Temperature controlNoises Water supply Ready indicator will not light Lime build-upComponent Access H10X Component Access H5E/DV-PC/XLocation ServiceLiquid Level Control Flow Charts Electronic ControlsService Service Electronic ControlsLiquid Level Control Test Procedure H5X Thermostat Replace the electronic control board Location Limit thermostat is located on the tank lid Service Limit ThermostatSafety Overflow Wiring Service Safety Overflow SwitchIf voltage was present as described, proceed to #5 Service Solenoid Valve Late ModelsService Solenoid Valve Early Models Check for continuity across the tank heater termi- nals Service Tank HeaterLocation Tank heater is located in the tank lid Thermistor Position Service Steam Sensor ThermistorLocation Dispense Valve is located behind control panel Service Dispense Valve PC OnlyTest Procedures Removal and ReplacementSingle Phase Early H5E, H5X, H10X Install jumper thru ver120V AC 2 Wire + GND 120/208V AC 3 Wire + GND 120/240V AC 3 Wire + GNDSchematic Wiring Diagram H5E-PC 230V AC 2 Wire + GNDH5-PC Schematic Wiring DiagramWire + GND Schematic Wiring Diagram H5E/H5X Relay Schematic Wiring Diagram H5XA, H5EA CESingle Phase Schematic Wiring Diagram H5 Element
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DV, H5E, H5X specifications

The Bunn H5E and H5X coffee machines represent a leap forward in brewing technology, specifically tailored for commercial use. Both models focus on delivering high-quality coffee while maximizing efficiency, making them ideal choices for busy cafés and restaurants.

The Bunn H5E features a unique 5-liter dual tank system, which allows for faster brewing times and reduces wait periods for customers. This dual tank setup facilitates the simultaneous preparation of multiple coffee types, catering to a diverse clientele. The H5X, on the other hand, is equipped with advanced electronic controls that permit precise temperature adjustments to ensure that the ideal brewing conditions are maintained, enhancing flavor extraction.

One of the standout features of both models is the patented BrewOptimized Technology. This technology helps maintain optimal water temperature and consistent flow rates throughout the brewing process, ensuring that each cup of coffee meets the high standards expected in commercial settings. Additionally, the units utilize a patented stainless steel brew basket that enhances durability and simplifies cleaning, making maintenance less of a chore for busy staff.

Another significant characteristic of the H5E and H5X is their programmable settings, which allow operators to customize brewing parameters according to their specific preferences or customer needs. This flexibility means that establishments can experiment with various coffee profiles, ensuring that they serve only the best products to their patrons.

Safety is also a priority in the design of these machines. The H5E and H5X come equipped with built-in safety features such as automatic shut-off and thermal overload protection, which help to prevent accidents and enhance longevity. Moreover, their compact design allows for easy installation in a variety of settings, whether it's a small coffee stand or a large restaurant operation.

Both the Bunn H5E and H5X models are energy-efficient, with features that minimize power consumption without compromising performance. This focus on sustainability not only helps reduce overhead costs but also appeals to environmentally conscious consumers.

In summary, the Bunn H5E and H5X coffee machines are engineered for high performance, reliability, and versatility. With features designed to provide quick, quality coffee while ensuring ease of operation and maintenance, these machines are ideal for any establishment that takes its coffee seriously. Whether you’re brewing for a crowd or crafting specialty drinks, the H5E and H5X stand ready to deliver excellent results every time.
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