Bunn EASY CLEAR H5E, EASY CLEAR H5X User Manual
H10X/H5X
H5E/DV PC
H5 ELEMENT
With Digital Control Board
SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
To ensure you have the latest revision of the manual or to obtain the illustrated parts catalog, please visit
the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain
the latest catalog and manual updates. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain
a paper copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.
42311.0000B 05/11 © 2011 BUNN-O-MATIC CORPORATION
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY
Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:
1) All equipment other than as specifi ed below: 2 years parts and 1 year labor.
2) Electronic circuit and/or control boards: parts and labor for 3 years.
3) Compressors on refrigeration equipment: 5 years parts and 1 year labor.
4) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis:
parts and labor for 3 years or 30,000 pounds of coffee, whichever comes fi rst.
These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by
it will be commercially free of defects in material and workmanship existing at the time of manufacture and
appearing within the applicable warranty period. This warranty does not apply to any equipment, component or
part that was not manufactured by BUNN or that, in BUNN’s judgment, has been affected by misuse, neglect,
alteration, improper installation or operation, improper maintenance or repair, damage or casualty. This warranty is
conditioned on the Buyer 1) giving BUNN prompt notice of any claim to be made under this warranty by telephone
at (217) 529-6601 or by writing to Post Offi ce Box 3227, Springfi eld, Illinois 62708-3227; 2) if requested by
BUNN, shipping the defective equipment prepaid to an authorized BUNN service location; and 3) receiving prior
authorization from BUNN that the defective equipment is under warranty.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR
ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of BUNN
are not authorized to make modifi cations to this warranty or to make additional warranties that are binding on
BUNN. Accordingly, statements by such individuals, whether oral or written, do not constitute warranties and
should not be relied upon.
If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its
exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts
and/or labor (during the applicable parts and labor warranty periods specifi ed above) to repair the defective
components, provided that this repair is done by a BUNN Authorized Service Representative; or 2) shall replace
the equipment or refund the purchase price for the equipment.
THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF
THIS EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S
SOLE OPTION AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND.
In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profi ts, lost sales,
loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute
equipment, facilities or services, or any other special, incidental or consequential damages.
392, AutoPOD, AXIOM, BrewLOGIC, BrewMETER, Brew Better Not Bitter, BrewWISE, BrewWIZARD, BUNN Espress, BUNN
Family Gourmet, BUNN Gourmet, BUNN Pour-O-Matic, BUNN, BUNN with the stylized red line, BUNNlink, Bunn-OMatic,
Bunn-O-Matic, BUNNserve, BUNNSERVE with the stylized wrench design, Cool Froth, DBC, Dr. Brew stylized Dr. design,
Dual, Easy Pour, EasyClear, EasyGard, FlavorGard, Gourmet Ice, Gourmet Juice, High Intensity, iMIX, Infusion Series,
Intellisteam, My Café, PowerLogic, Quality Beverage Equipment Worldwide, Respect Earth, Respect Earth with the stylized leaf and coffee cherry design, Safety-Fresh, savemycoffee.com, Scale-Pro, Silver Series, Single, Smart Funnel, Smart
Hopper, SmartWAVE, Soft Heat, SplashGard, The Mark of Quality in Beverage Equipment Worldwide, ThermoFresh, A
Partner You Can Count On, Air Brew, Air Infusion, Beverage Bar Creator, Beverage Profi t Calculator, Brew better, not bitter.,
BUNNSource, Coffee At Its Best, Cyclonic Heating System, Digital Brewer Control, Nothing Brews Like a BUNN, Pouring
Profi ts, Signature Series, Tea At Its Best, Phase Brew, The Horizontal Red Line, Titan, trifecta, Ultra, Velocity Brew are
either trademarks or registered trademarks of Bunn-O-Matic Corporation.
2
42311 051910
WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualifi ed service
personnel. Disconnect the dispenser fromthe power source when servicing, except when electrical tests are
required and the test procedure specifi cally states to connect the dispenser to the power source.
CONTENTS
TroubleShooting ............................................................................................ 4
Component Access ....................................................................................... 7
Electronic Controls ...................................................................................8-11
Limit Thermostat .........................................................................................12
Safety Overfl ow Switch ...............................................................................13
Solenoid Valve (Late Models)......................................................................14
Solenoid Valve (Early Models) ....................................................................15
Tank Heater ................................................................................................. 16
Steam Sensor .............................................................................................17
Dispense Valve (PC) ....................................................................................18
Electrical Schematic ...............................................................................19-23
3
42311 071310
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 qualifi ed 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 fi ttings 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 specifi ed.
• Follow recommended service procedures
• Replace all protective shields or safety notices
FAULT CODES
When a fault occurs (failure to the unit) the POWER lamp will fl ash to identify the problem.
Flashes Description of Failure
1 Temperature Sensor (short)
2 Temperature Sensor (open)
3 Refi ll Fault (continuous refi ll for 15 minutes)
4 Heater Fault (heater relay on for 120 minutes)
5 Boil Thermistor (short) H5X/H10X only
6 Boil Thermistor (open) H5X/H10X only
Problem
Equipment will not operate.
Probable Cause
1. No power or incorrect voltage
Remedy
(A) Check the terminal block for the correct 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
TROUBLESHOOTING (cont.)
Problem Probable Cause Remedy
Equipment will not operate
(cont.)
Automatic refi ll will not operate after drawing hot water.
2. Safety overfl ow switch
1. No water
2. Water strainer/fl ow control
3. Liquid level system
4. Solenoid valve
Refer to Service – safety overfl ow switch
for testing procedures.
Check plumbing and shut-off valves.
(A) Direction of fl ow arrow must be pointing towards dispenser.
(B) Remove the strainer/fl ow control and
check for obstructions. Clear or replace.
Refer to Service – electronic controls for
testing procedures.
Refer to Service – solenoid valve for testing procedures.
Water fl ows into the tank continuously (Dispenser discon-
1. Solenoid valve
Refer to Service – solenoid valve for testing procedures.
nected from power source).
Water fl ows into the tank continuously (Dispenser connect-
1. Liquid level system
Refer to Service – electronic controls for
testing procedures.
ed to power source).
Water is cold.
1. Safety overfl ow switch
Refer to Service – safety overfl ow switch
for testing procedures.
2. Limit thermostat
Refer to Service – limit thermostat for
testing procedures.
CAUTION – Do not eliminate or bypass limit thermostat. Use only B.O.M. replacement part #23717.0003.
3. Tank heater
Refer to Service – tank heater for testing
procedures.
4. Temperature control
Refer to Service – electronic controls for
testing procedures.
5
42311 071310
TROUBLESHOOTING (cont.)
Problem Probable Cause Remedy
Water boils continuously.
1. Temperature control
Refer to Service – electronic controls for
testing procedures.
2. Lime build-up
Inspect the tank assembliy for excess lime
deposits. Delime as required.
CAUTION – Tanks and tank components should be delimed reglarly depending on local water conditions. Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks.
Dispenser is making unusual
noises.
1. Plumbing lines
3. Water supply
Plumbing lines should not be resting on
the counter top.
(A) The dispenser must be connected to a
cold water line.
(B) Water pressure to the dispenser must
not be higher than 90 psi (620 kPa). Install
a regulator if necessary to lower the working pressure to approximately 50 psi (345
kPa).
Ready indicator will not light.
1. Temperature control
2. Ready Indicator LED
Refer to Service – electronic controls for
testing procedures.
Replace the indicator LED.
6
42311 071310
SERVICE
WARNING – Disconnect the dispenser from the power source before the removal of any panel or the replacement
of any component. WARNING - Inspection, testing, and repair of electrical equipment should be performed only
by qualifi ed service personnel. Disconnect the dispenser fromthe power source when servicing, except when
electrical tests are required and the test procedure specifi cally states to connect the dispenser to the power source.
Component Access - H5E/DV-PC/X Component Access - H10X
:$51,1*
9HU\+RW:DWHU
8VH:LWK&DUH
P1770.30
The check valve, electronic control assembly, safety
overfl ow switch, solenoid valve, overfl ow tube temperature sensor and terminal block are located at the rear of
the dispenser. Access is gained by removing the upper
and lower rear panels. The upper is attached with six
8-32 slotted-head screws. The lower is attached with
four 8-32 slotted-head screws. The middle panel must
not be removed from the dispenser.
P878.30
The check valve, electronic control assembly, overfl ow protection switch, solenoid valve, overfl ow tube
temperature sensor, triac assembly (EARLY MODELS
ONLY) and terminal block are located on the side of
the dispenser. Access is gained by removing the side
panel. The panel is attached with eight 8-32 slottedhead screws.
Faceplate Removal - H5 ELEMENT: After removing
top cover, remove the two upper screws securing the
faceplate. Carefully lift faceplate straight up until the
three lower screws clear the key holes.
7
42311 022311
SERVICE
Electronic Controls
Liquid Level Control Flow Charts
H5E, H5X LIQUID LEVEL CONTROL
PROBLEM: Does Not Refill
Triac Assy
H 5
FIG. 8a ELECTRONIC CONTROL
P4093.35
Overflow Cup Full
No
Disconnect Level Probe
Voltage present at
Solenoid Valve
?
Unplug Ready Lamp
Voltage present at
Solenoid Valve
?
No
Replace Control Board
Yes
Yes
Yes
Remove Power
Does Water Flow
Replace Solenoid Valve
Replace Ready Lamp
?
No
H5E, H5X LIQUID LEVEL CONTROL
PROBLEM: Overflows
Drain cup
Retry
?
Yes
No
Replace Probe
Electronic
Control Board
JSP)/2:
SVLJPD[RSHUDWLQJSUHVVXUH
5HSO6FUHHQ
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6WUDLQHU)ORZ&RQWURO
5HSO)ORZ:DVKHU
H 10
P1991-1.30
FIG. 8b ELECTRONIC CONTROL
BOARD AND TRIAC
Location:
The electronic control board is located inside the
rear of the dispenser. Access will also be needed to the
temperature sensor, overfl ow tube temperature sensor,
and liquid level probe located on the tank lid.
General:
This system controls the liquid level and water
temperature of the dispenser. These two functions
act independently of each other and should be tested
separately.
Drain cup
Unplug Ready Lamp
Retry
Overflow
?
Yes
Drain cup
Disconnect Probe
Wire From Probe
Short Probe Wire
To Chassis
Retry
Overflow
?
Yes
Drain cup
Disconnect Wire From
Solenoid Valve
Retry
Overflow
?
No
Replace Control Board
No
No
Yes
Replace Ready Lamp
Replace Probe
Replace Solenoid Valve
8
42311 071310
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