Bunn H5E H5X service manual Service Electronic Controls, Liquid Level Control Test Procedure

Page 11

SERVICE (cont.)

Electronic Controls (cont.)

Liquid Level Control Test Procedure

1.Disconnect the dispenser from the power source.

2.Check the voltage across terminals 3 & 4 of the electronic control assembly with a voltmeter. Con- nect the dispenser to the power source. The indi- cation 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.

3.Disconnect the dispenser from the power source. If voltage was present as described, proceed to #4. If voltage was not present as described, refer to the Wiring Diagrams and check the dispenser wir- ing harness.

4.Remove the pink wire from terminal 5 of the elec-

Temperature Control Flow Charts

tronic control assembly.

5.Check the voltage across terminals 1 & 4 of the electronic control assembly with a voltmeter. Con- nect the dispenser to the power source. The indi- cation must be:

a.) 100 to 120 volts ac for 100 to 120 voltmodels or

b.) 200 to 240 volts ac for 200 to 240 volt models after a delay of approximately 5 seconds.

6.Disconnect the dispenser from the power source.

If voltage was present as described, the liquid level control of the system is operating properly, proceed to #7.

If voltage was not present as described, replace the electronic control assembly and the temperature sen- sor in the tank lid.

NOTE - Each electronic control assembly is calibrated to a temperature sensor. Both components MUST be replaced as a set.

H5X THERMOSTAT

PROBLEM: Water Not Hot Enough

H5E THERMOSTAT

PROBLEM: Water Not Hot Enough

Jumper JP1

No

 

Reposition Jumper

In Boil Position

 

?

 

 

 

 

Yes

 

 

Red Light On

No

Constantly

 

?

 

Turn Temperature

Adjustment Screw

Clockwise Contiuously

Red Light On

No

Constantly

 

?

 

 

Yes

 

 

 

 

 

 

Measure Voltage

 

At Tank Heater

 

 

 

Yes

Voltage Present

?

 

Replace Steam Sensor

Red Light On

Yes

 

Constantly

 

 

 

 

?

 

 

 

 

 

 

Recheck Water Temperature

No

Replace Control Assembly

Replace Tank Heater

 

Yes

 

 

 

 

Measure Voltage

 

At Tank Heater

 

 

 

Yes

Voltage Present

?

 

 

No

 

 

 

 

 

 

Red Light On

 

Yes

?

 

 

 

 

 

 

 

 

 

 

Adjust For Correct

 

No

Water Temperature

 

 

 

 

 

Replace Control Assembly

Replace Tank Heater

Limit Thermostat OK

No

Replace Limit Thermostat

 

?

 

 

 

No

 

 

 

 

Limit Thermostat OK

No

 

 

Replace Limit Thermostat

 

 

 

?

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

Replace Control Assembly

 

 

 

 

 

 

 

 

 

 

Measure Voltage

 

 

 

 

At Tank Heater

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Triac

Voltage Present

No

 

 

 

 

 

Check For Split Tank Heater

 

 

 

?

 

 

 

 

 

 

 

Reinstall Original

 

 

 

 

 

 

Yes

 

 

 

Control Assembly

 

 

 

 

 

 

 

 

 

 

 

Recheck Water Temperature

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

Replace Control Assembly

 

 

 

 

 

 

 

 

Measure Voltage

 

 

 

At Tank Heater

 

 

 

 

 

 

 

 

 

 

 

 

Replace Triac

Voltage Present

No

 

 

 

Check For Split Tank Heater

 

 

?

 

 

 

 

 

 

 

Reinstall Original

 

Yes

 

 

Control Assembly

 

 

 

 

 

 

 

 

 

Recheck Water Temperature

 

 

 

 

 

 

 

 

11

10420 011599

 

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Contents Bunn Introduction ContentsWarranty User Notices Electrical Hook-Up Electrical RequirementsPlumbing Requirements Draining the Dispenser CleaningWall Mounted Installation Initial SET-UPProblem Probable Cause Remedy TroubleshootingTroubleshooting Problem Probable Cause Dispenser is making unusual noises Water boils continuously Temperature controlLime build-up Deposits. Delime as requiredComponent Access ServiceGeneral This system controls the liquid level and water tem Liquid Level Control Flow ChartsLocation Liquid Level Control Test Procedure Service Electronic ControlsProblem Boils Excessively Fills Cup Service Electronic Controls Wiring Connections 5A. to Increase the Temperature AdjustmentsLocation Limit thermostat is located on the tank lid Service Limit ThermostatTest Procedure Switch Service Safety Overflow SwitchSolenoid Valve Service Solenoid ValveCheck for continuity across the tank heater termi- nals Service Tank HeaterLocation Tank heater is located in the tank lid Volts a C Wiring DiagramsVolts a C Wiring Diagrams Schematic Wiring Diagram H5E

H5E H5X specifications

The Bunn H5E and H5X coffee brewers are renowned for their high-quality brewing capabilities, designed to meet the demands of both commercial and specialty coffee environments. These brewers stand out due to their innovative features, reliable performance, and user-friendly designs, making them a preferred choice for cafes, restaurants, and other establishments.

One of the primary features of the Bunn H5E and H5X models is their high-efficiency brewing system. These machines utilize a digital brewing control that ensures precise water temperatures and accurate brew times. This technology allows baristas to achieve optimal extraction from coffee grounds, resulting in a consistent, flavorful cup of coffee every time. The machines are equipped with a stainless-steel hot water tank, allowing for rapid brewing and serving for high-volume coffee demands.

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Both models incorporate advanced technology such as the Cold Brew Activation feature, allowing users to make cold brew coffee efficiently. The programmable settings enable baristas to customize brewing parameters according to their specific coffee recipes, providing the ability to create unique flavor profiles that cater to customer preferences.

Durability is another significant characteristic of the Bunn H5E and H5X brewers. Built with heavy-duty materials, these machines are designed to withstand the rigorous demands of a high-traffic environment. They also feature an easy-to-clean design, ensuring that maintenance is fast and straightforward.

In summary, the Bunn H5E and H5X coffee brewers are optimized for efficiency, adaptability, and durability, making them ideal for any coffee-serving establishment. Their innovative brewing technologies and user-friendly features empower baristas to deliver exceptional coffee while minimizing downtime, ensuring that every customer enjoys a perfect cup of coffee crafted to perfection.
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