Bunn service manual H5X Thermostat

Page 15

SERVICE (cont.)

Electronic Controls (cont.)

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.

9.Check the voltage across terminals 1 & 4 of the elec- tronic control assembly 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 mod- els

or

c.) 230 volts ac for 230 volt models after a delay of approximately 5 seconds.

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:

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 after a delay of approximately 5 seconds.

12.Disconnect the dispenser from the power source.

Temperature Control Flow Charts (cont.)

H5X THERMOSTAT

PROBLEM: Boils Excessively - Fills Cup

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

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 Test Procedure

1.Disconnect the dispenser from the power source.

2.Check the voltage across terminals 3 & 4 of the electronic control circuit board 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 mod- els

or

c.) 230 volts ac for 230 volt models.

3.Disconnect the dispenser from the power source.

4.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 mod- els

or

c.) 230 volts ac for 230 volt models.

5.Disconnect the dispenser from the power source.

H5E THERMOSTAT

PROBLEM: Boils

Drain cup

Retry

Red Light On While

Boiling

?

No

Disconnect Blue Wire From

Control Board Pin 7

Retry

Still Boiling

?

No

Replace Control Board

Yes

Replace Steam Sensor

 

 

 

 

Still Boiling

Yes

 

 

 

?

 

No

Finished

Yes

Replace Triac Assembly

Check For Split

Tank Heater

Replace Control Assembly

Drain cup

Retry

Red Light On While

Yes

Boiling

 

?

 

 

No

 

Disconnect Blue Wire From

Control Board Pin 7

Retry

 

 

 

 

Yes

 

 

Still Boiling

?

 

 

No

Replace Control Board

Replace Control Assembly

Replace Triac Assembly

Check For Split

Tank Heater

15

10420.1 040309

 

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Contents H5E, H5X BUNN-O-MATIC Commercial Product Warranty Contents IntroductionUser Notices Electrical Requirements CE RequirementsElectrical Hook-Up Plumbing Requirements Initial SET-UPPlumbing Hook-Up Level 1 Programming ProgrammingLevel 2 Programming Restoring Factory DefaultsSupport for Large Receptacles CleaningWall Mounted Installation Draining the DispenserTroubleshooting Problem Probable Cause RemedyFlashes Equipment will not Operate Safety overflow switch Water boils continuously Temperature control Component Access ServiceLocation Service Electronic ControlsLiquid Level Control Test Procedure H5X Thermostat Wiring Connections Test Procedure Service Limit ThermostatSafety Overflow Switch Service Safety Overflow SwitchSolenoid Valve Service Solenoid ValveTank Heater Service Tank HeaterSchematic Wiring Diagram H5E Schematic Wiring Diagram H5X Volts AC RED Schematic Wiring Diagram H5XA, H5EA
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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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