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 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- 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 200 to 240 volts ac for 200 to 240 volt models after a delay of approximately 5 sec- onds.

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.

9.Check the voltage across the terminals 1 & 4 of the electronic control assembly with a voltmeter. Con- nect the dispenser to the power source. The indi- cation must be 200 to 240 volts ac for 200 to 240 volt models after a delay of approximately 5 sec- onds.

10.Touch the screw head end of the probe to the dis- penser housing. The indication must be 0.

11.Move the probe away from the dispenser housing. The indication must again be 200 to 240 volts ac for 200 to 240 volt models after a delay of approxi- mately 5 seconds.

12.Disconnect the dispenser from the power source.

If voltage was present as described, reinstall the probe, the sensing function of the system is operating prop- erly.

If voltage was not present as described, check the pink probe wire and the green ground wire for continuity and/or replace the probe.

Temperature control Flow Charts

H10X THERMOSTAT

PROBLEM: Water Not Hot Enough

Jumper JP1

No

 

Reposition Jumper

In Boil Position

 

?

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

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.

Heater Light On

No

Constantly

 

?

 

 

Yes

 

 

 

 

 

 

Measure Voltage

 

At Tank Heater

 

 

 

Yes

Voltage Present

?

 

Replace Steam Sensor

Heater Light On

Yes

 

Constantly

 

 

 

 

?

 

 

 

 

 

 

Recheck Water Temperature

No

Replace Control Assembly

Replace Tank Heater

7.Reconnect the pink wire to terminal 5 of the elec- tronic control assembly.

8.Loosen the compression fitting, remove the probe from the tank lid, and inspect it for mineral depos- its. Replace it if necessary. Keep the exposed ends of the probe away from any metal surface of the dispenser.

 

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

 

 

 

 

 

 

 

 

 

 

11

10889 091599

 

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Bunn H10X service manual Service Electronic Controls, Liquid Level Control Test Procedure
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H10X specifications

The Bunn H10X is a state-of-the-art coffee brewer designed for both commercial and high-demand home environments. Renowned for its reliability and superior performance, the H10X is engineered to deliver exceptional coffee quality while streamlining the brewing process.

One of the main features of the Bunn H10X is its capacity to brew large quantities of coffee efficiently. It boasts a 10-gallon tank, allowing it to produce up to 20 gallons of freshly brewed coffee in just one hour. This makes it an ideal choice for offices, cafes, and businesses that require a constant supply of coffee for their customers or employees.

The H10X is equipped with advanced brewing technology that ensures optimal extraction of flavor from coffee grounds. Its patented Pulse Brew feature enhances the brewing process by controlling the flow of water through the coffee grounds, enhancing flavor extraction and improving the overall taste profile. This technology is particularly beneficial for specialty coffees, where nuanced flavors are essential.

Additionally, the Bunn H10X incorporates a digital thermal control system, allowing users to adjust brewing temperatures for their specific coffee types. This precise control ensures that the coffee is brewed at the ideal temperature, maximizing flavor and aroma while minimizing bitterness. The machine also features a built-in water tank heater, providing consistent brewing temperatures throughout the day.

User-friendliness is another hallmark of the H10X. The intuitive interface includes programmable options for brewing strength and timing, enabling users to customize their coffee experience easily. An LCD display provides real-time updates on brewing status, making it simple to monitor the process.

Durability is a key characteristic of the Bunn H10X. Constructed from high-grade materials, this coffee brewer is built to withstand the demands of a bustling environment. Enhanced insulation keeps coffee hot for extended periods while reducing energy consumption.

For ease of maintenance, the H10X features a removable brew basket and a straightforward cleaning process. This design not only helps maintain the unit's performance but also extends its lifespan.

In summary, the Bunn H10X is a powerful, efficient, and user-friendly coffee brewer that stands out in the marketplace. With its impressive capacity, advanced brewing technologies, and robust construction, it is an ideal choice for anyone seeking a high-quality coffee solution.
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