TROUBLESHOOTING

A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department.

Inspection, testing, and repair of electrical equipment should be performed only by qualified service person- nel.

All electronic components have 120 – 240 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the application of external voltages may result in board failure.

Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a terminal or crimp.

Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are energized for more than ten minutes without a supply of water.

The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will help to avoid twists and kinks in the tubing.

Make certain that all plumbing connections are sealed and electrical connections tight and isolated.

This dispenser is heated at all times. Keep away from combustibles.

WARNING

Exercise extreme caution when servicing electrical equipment.

Disconnect dispenser from the power source when servicing, except when electrical tests are specified.

Follow recommended service procedures

Replace all protective shields or safety notices

 

 

 

When a fault occurs (failure to the unit) the POWER lamp will

FAULT CODES

 

flash to identify the problem (early models)

 

Flashes

Description of Failure

 

 

 

Er1

Temperature Sensor (short)

 

1

Temperature Sensor (short)

Er2

Temperature Sensor (open)

 

2

Temperature Sensor (open)

Er3

Refill Fault (continuous refill for 15 minutes)

3

Refill Fault (continuous refill for 15 minutes)

Er4

Heater Fault (heater relay on for 120 minutes)

4

Heater Fault (heater relay on for 120 minutes)

Er5

Boil Thermistor (short) H5X/H10X only)

5

Boil Thermistor (short) H5X/H10X only

Er6

Boil Thermistor (open) H5X/H10X only)

6

Boil Thermistor (open) H5X/H10X only

Problem

Probable Cause

 

Remedy

Equipment will not operate.

1. No power or incorrect voltage

(A) Check the terminal block for the cor-

rect voltage. It should be:

a.) 100 to 120 volts ac across the black and white terminals for 100 to 120 volt models or,

b.) 200 to 240 volts ac across the red and black terminals for 200 to 240 volt models or,

c.) 230 volts ac across the red and black terminals for 230 volt models.

(B) Check circuit breakers or fuses.

4

42311 071310

 

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Bunn H5E, H5X, DV service manual Fault Codes, Flashes Description of Failure, Problem, Remedy

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.