OPERATING & SERVICE MANUAL
Contents
1. O O OPERATING amp 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 10889 0000 02 08 1995 Bunn O Matic Corporation www bunn com BUNN O MATIC COMMERCIAL PRODUCT WARRANTY Bunn O Matic Corp BUNN warrants equipment manufactured by it as follows 1 All equipment other than as specified 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 first 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 warr2. I TANK HEATER OVERFLOW PROTECTION Rep SWITCH RED 1 ELECTRONIC 2 i CONTROL ASSY WHI Tone GRY w ATER D 2 6 GRY PNK T m RY G oa GRY 2 WHI BLU REFILL PROBE U il TEMP SENSOR INTERLOCK DRY PLUG IN STEAM SENSOR DRY LEVEL PROBE 200 240 VOLTS AC 2 WIRE GND SINGLE PHASE 20 10889 101807
3. Pulse Wave Quality Beverage Equipment Worldwide Signature Series Silver Series Smart Heat SmartWAVE Tea At Its Best The Horizontal Red Line Titan Ultra are either trademarks or registered trademarks of Bunn O Matic Corporation 2 10889 020608 USER NOTICES Carefully read and follow all notices on the equipment and in this manual They were written for your protec tion All notices are to be kept in good condition Replace any unreadable or damaged labels A WARNING A WARNING Fill water tank before turning on thermostat or connecting appliance to power source Use only on a properly protected circuit capable of the rated load Electrically ground the chassis Follow national local electrical codes Use With Care se a re Do not use near combustibles 12593 0000 FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE FIRE OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL BEFORE BUYING OR USING THIS PRODUCT THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00831 0000 3 98 1998 BUNN O MATIC CORPORATION This equipment must be installed to comply with the International Plumbing Code of the International Code Council and the Food Code Manual of the Food and Drug Adminis tration FDA For models installed outside the U S A comply with the applicable Plumbing Sanitation Code 00656 0000 00831 0000 2 S A WARNING To reduce the risk of electric shock do not remove or ope
4. Water Not Hot Enough Jumper JP1 In Boil Position 7 Yes Heater Light On Constantly 2 Yes Measure Voltage At Tank Heater Reposition Jumper Replace Steam Sensor Heater Light On Constantly 2 Recheck Water Temperature No Replace Contro Assembly Replace Tank Heater Replace Limit Thermostat Replace Control Assembly Measure Voltage At Tank Heater Replace Triac Check For Split Tank Heater Reinstall Original Control Assemb Recheck Water Temperature 10889 091599 SERVICE cont Electronic Controls cont Temperature Control Flow Charts cont H10X THERMOSTAT PROBLEM Boils Excessively Fills Cup Heater Light On Whil Boiling Replace Steam Sensor Disconnect Blue Wire From Control Board Pin 7 Still Boiling No Replace Control Assembly Replace Control Assembly Replace Triac Assembly Check For Split Tank Heater Temperature Control Test Procedure 1 Disconnect the dispenser from the power source Check the voltage across terminals 3 amp 4 of the electronic control circuit board with a voltmeter Connect the dispenser to the power source The indication 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 Wir ing Diagram and check the dispenser wiri
5. from a 7 or larger supply line A shut off valve should be installed in the line before the dispenser Install a regulator in the line when pressure is greater than 90 psi 620 kPa to reduce it to 50 psi 345 kPa The water inlet fitting is flare NOTE Bunn O Matic recommends tubing for installations of less than 25 feet and 3 8 for more than 25 feet from the water supply line At least 18 inches of an FDA approved flexible beverage tubing such as re inforced braided polyethylene or silicone before the dispenser will facilitate movement to clean the countertop 0 does not recommend the use of a saddle valve to install the dispenser The size and shape of the hole made in the supply line by this type of device may restrict water flow This equipment must be installed to comply with the International Plumbing Code of the International Code Council and the Food Code Manual of the Food and Drug Administration FDA For models installed outside the U S A you must comply with the applicable Plumbing Sanitation Code for your area Plumbing Hook Up 1 Flush the water line and securely attach it to the flare fitting at the rear of the dispenser 2 Turn the water supply 4 10889 021408 CE REQUIREMENTS This appliance must be installed in locations where it can be overseen by trained personnel For proper operation this appliance must be installed where the temperature is between 0 C to 35
6. sensor overflow tube temperature sensor and indicator wires from the left side of the electronic control assembly board 4 Remove the temperature sensor from the grommet in the tank lid Install the new temperature sensor into the grom met on the tank lid Route the wires to the location of the new electronic control assembly Attach the temperature sensor overflow tube temperature sensor and indicator wires to the electronic control assembly Fasten the new electronic control assembly to its bracket Reconnect the wires Review the initial set up procedures BLU to Triac Assy A TAN to Triac Assy 52 BLU to Triac Assy TAN to Triac Assy PNK to Liquid Level Probe RED to Terminal block SS RED to Solenoid 522 BLK to Overflow Safety Switch 5 GRN to Chassis Ground WHI BLU to Solenoid if LLM FIG 2 WIRING CONNECTIONS lt WHI amp WHI to Temperature Sensor __ amp GRY to Heater Indicator Refill Indicator Power Indicator Ready Indicator GRY amp GRY re to Thermistor O sr 1992 FIG 3 WIRING CONNECTIONS 10889 091599 SERVICE cont Electronic Controls cont Triac Assembly Removal and Replacement NOTE Each triac installation requires the use of an approved silicone heat sink compound Bunn O Matic recommends the use of Dow Corning 340 compound or equivalent It can be
7. the power source The indication must be 200 to 240 volts ac for 200 to 240 volt models while the red indicator on the circuit board is on or blinking 10889 091599 SERVICE cont Electronic Controls cont 11 Disconnect the dispenser from the power source If voltage was present as described return the new triac assembly to Bunn O Matic for credit The temperature control of the system is operating properly If voltage was not present as described reinstall your existing electronic control assembly and temperature sensor and proceed to 12 12 Replace the triac assembly 13 Check the voltage across the tank heater terminals with a voltmeter Connect the dispenser to the power source The indication must be 200 to 240 volts ac for 200 to 240 volt models while the red indicator on the circuit board is on or blinking 14 Disconnect the dispenser from the power source If voltage was present as described the temperature control of the system is operating properly Return the new electronic control assembly and temperature sensor to Bunn O matic for credit Electronic Control Removal and Replacement NOTE Each electronic control assembly is calibrated to a temperature sensor probe Both components MUST be replaced as a set 1 Remove all wires from the electronic control as sembly terminals 2 Remove the two 8 32 screws holding the electronic control assembly to the component bracket 3 Disconnect the temperature
8. 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 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 11 9 Check the voltage across the terminals 1 amp 4 of the electronic control assembly with a voltmeter Connect the dispenser to the power source The indication must be 200 to 240 volts ac for 200 to 240 volt models after a delay of approximately 5 seconds Touch the screw head end of the probe to the dis penser housing The indication must be 0 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 approximately 5 seconds 12 Disconnect the dispenser from the power source 10 11 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 Flow Charts H10X THERMOSTAT PROBLEM
9. C Appliance shall not be tilted more than 10 for safe operation An electrician must provide electrical service as specified in conformance with all local and national codes This appliance must not be cleaned by water jet This appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given instructions concern ing use of this appliance by a person responsible for its safety e f the power cord is ever damaged it must be replaced by the manufacturer or authorized service personel with a special cord available from the manufacturer or its authorized service personel in order to avoid a hazard INITIAL SET UP CAUTION The dispenser must be disconnected from the power source throughout the initial set up except when specified in the instructions 1 Connect the dispenser to the power source and turn on the water supply 2 The HEATER LED will glow for approximately five seconds During this time the electronic circuitry will check for a full tank of water 3 Ifthe tank is not full of water the refill circuit will energize indicated by the REFILL LED glowing Water will automatically flow into the tank to the proper level and then shut off 4 When the tank is full of water the heater circuit will energize indicated by the HEATER LED glowing inter mittently until the proper temper
10. anty 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 Office Box 3227 Springfield 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 modifications 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 lf BUNN determines 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
11. ature is achieved A completely cold tank will take approximately twenty minutes for the water to heat 5 READY LED will glow when the proper water temperature is achieved NOTE Stop dispensing if the READY LED is off Dispense only when the READY LED glows DRAINING THE DISPENSER CAUTION The dispenser must be disconnected from the power source throughout these steps Disconnect the dispenser from the power source Shut off and disconnect the incoming water supply Remove the small screws from the sides and front of the top panel Gently remove one of the grommets from the tank lid Insert a tube to the bottom of the tank and syphon ALL of the water out Se Ne NOTE The dispenser must be refilled using the INITIAL SET UP steps before reconnecting to the power source CLEANING The use of a damp cloth rinsed in any mild non abrasive liquid detergent is recommended for cleaning all surfaces on Bunn O Matic equipment 5 10889 021408 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 200 240 volt ac and low voltage dc potential on their terminals Shor
12. ed within the side of the dispenser on the right side near the bottom To test the solenoid valve access will also be needed to the electronic control assembly WA OW X WE P1994 FIG 9 SOLENOID VALVE Test Procedure 1 Disconnect the dispenser from the power source and turn off the water supply to the dispenser Remove the pink wire from terminal 5 of the elec tronic control assembly Check the voltage across the solenoid valve coil terminals with a voltmeter Connect the dispenser to the power source The indication must be 200 to 240 volts ac for 200 to 240 volt models after a delay of approximately 5 seconds 4 Disconnect the dispenser from the power source 2 3 17 If voltage was present as described proceed to 5 If voltage was not present as described refer to the Wiring Diagrams and check the dispenser wiring har ness 5 Remove both wires from the solenoid valve coil terminals 6 Check for continuity across the solenoid valve coil terminals If continuity is present as described reconnect the wires and proceed to 7 If continuity is not present as described replace the solenoid valve coil 7 Check the solenoid valve for coil action Connect the dispenser to the power source Listen carefully in the vicinity of the solenoid valve for a clicking sound after approximately 5 seconds as the coil magnet attracts the pl
13. eplacement part 23717 0003 10889 101807 TROUBLESHOOTING cont PROBLEM PROBABLE CAUSE Water is cold cont 3 Tank heater 4 Temperature control 5 Dry plug protection Water boils continuously 1 Temperature control 2 Lime build up REMEDY Refer to Service Tank heater for testing procedures See page 19 Refer to Service Electronic con trols for testing procedures See page 12 Check connections to Interlock board and sheath of tank tempera ture probe Refer to Service Electronic con trols for testing procedures See page 12 Inspect the tank assembly for excess lime deposits Delime as required CAUTION Tanks and tank components should be delimed regularly depending on local water conditions Exces Sive mineral build up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks Dispenser is making unusual nois 1 Solenoid valve es 2 Plumbing lines 3 Water supply Ready indicator will not light when 1 Temperature control temperature is within 4 of its se lected setting 2 Ready Indicator LED The nut on top of the solenoid valve must be tight or it will vibrate during operation 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 Install a regulator if necessary to lower the working pressure to ap prox
14. imately 50 psi Refer to Service Electronic con trols for testing procedures See page 12 Replace the indicator LED 10889 072700 SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should service become necessary Refer to Troubleshooting for assistance in determining the cause of any problem Component Access WARNING Disconnect the dispenser from the power source before the removal of any panel or the replace ment of any component 22222222272222277222272722 878 The check valve electronic control assembly overflow protection switch solenoid valve overflow tube temperature sensor triac assembly and terminal block are located on the side of the dispenser Access is gained by removing the side panel The panel is at tached with eight 8 32 slotted head screws P878 The limit thermostat liquid level probe tank heater and temperature sensor are located at the top of the dispenser Access is gained by removing the top lid attached with four 4 40 slotted head screws WARNING Inspection testing and repair of electri cal equipment should be performed only by qualified service personnel Disconnect the dispenser fromthe power source when servicing except when electrical tests are required and the test procedure specifica
15. it thermostat and the red wire of the terminal block with a voltmeter Connect the dis penser to the power source The indication must be 200 to 240 volts ac for 200 to 240 volt models Disconnect the dispenser from the power source If voltage was present as described reconnect the black wire and proceed to 5 If voltage was not present as described refer to the Wiring Diagrams and check the dispenser wiring har ness 5 Check for continuity across the terminals of the limit thermostat If continuity is not present as described the circuit is broken Press the reset button of the limit thermostat and recheck for continuity If continuity is not present as described replace the limit thermostat Removal and Replacement 1 Remove both wires from the limit thermostat ter minals Remove the two 10 32 nuts attaching the limit thermostat to the top of the tank Install the new limit thermostat and secure into place with two 10 32 nuts Refer to FIG 6 when reconnecting the wires 2 3 BLK to Terminal Block BLK to Tank Heater P1776 FIG 6 LIMIT THERMOSTAT WIRING 10889 091599 SERVICE cont Overflow Protection Switch P1993 FIG 7 OVERFLOW PROTECTION SWITCH Location The overflow protection switch is located within the side of the dispenser inside the copper overflow cup For testing or removal of the overflow protection switch access may also be needed by rem
16. lly states to connect the dispenser to the power source Electronic 10 14 Limit 15 Safety Overflow Switch 16 Solenoid Valve 17 Tank Heater oeenn 19 20 10889 091599 SERVICE cont Electronic Control Assembly Troubleshooting Check these items first e 5 circuit board popped out of bracket 5 circuit board wet due to misaligned overflow tube e 5 water in overflow cup activating float switch e 5 overflow not making good contact with tank e 5 dispenser being operated with panels re moved Triac Assy Electronic Control P1991 FIG 1 ELECTRONIC CONTROL AND TRIAC Location The electronic control assembly is located inside the side of the dispenser Access will also be needed to the temperature sensor overflow tube temperature sensor and liquid level probe located on the tank lid and to the triac assembly located on the inside of the rear wall 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 10 H10X LIQUID LEVEL CONTROL PROBLEM Does Not Refill Overflow Cup Full Disconnect Level Probe Replace Probe Voltage present at Solenoid Va
17. lve Replace Control Assembly H10X LIQUID LEVEL CONTROL PROBLEM Overflows Unplug P2 from Circuit Board Repair shorted wires leading to P2 Disconnect wire from Refill Probe Short Probe Wire To Chassis Yes Replace Probe Disconnect Wire From Solenoid Valve Replace Solenoid Valve Replace Control Assembly 10889 101807 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 amp 4 of the electronic control assembly with a voltmeter Connect the dispenser to the power source The indication must be 200 to 240 volts ac for 200 to 240 volt models 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 wiring harness Remove the pink wire from terminal 5 of the elec tronic control assembly 5 Check the voltage across terminals 1 amp 4 of the elec tronic control assembly with a voltmeter Connect the dispenser to the power source The indication must be 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 lf voltage was present as described the liquid level control of the system is operating properly proceed to
18. n cover No user serviceable parts inside Authorized service personnel only NOTICE ALL COMPONENTS ARE 200 TO 240 VOLT A C Replace only with components listed in the accompaning literature rated for the same 37881 0000 voltage Disconnect power before servicing 12537 0000 3 10889 021408 ELECTRICAL REQUIREMENTS CAUTION The dispenser must be disconnected from the power source until specified in Initial Set Up This dispenser requires 2 wire grounded service rated 208 or 240 volts ac 40 amp single phase Refer to the dispenser s dataplate for exact voltage requirement Electrical Hook Up CAUTION Improper electrical installation will damage electronic components 1 electrician must provide electrical service as specified 2 Using a voltmeter check the voltage and color coding of each conductor at the electrical source 3 Remove the side panel 4 Install the proper electrical wiring to the terminal block 5 Connect the dispenser to the power source and verify the voltage at the terminal block before proceeding Reinstall the side panel 6 If plumbing is to be hooked up later be sure the dispenser is disconnected from the power source If Plumbing has been hooked up the dispenser is ready for Initial Set Up 208 or 240V A C PLUMBING REQUIREMENTS This dispenser must be connected to a COLD WATER system with operating pressure between 20 and 90 psi 138 and 620 kPa
19. ng harness 4 5 Connect the dispenser to the power source Observe the red indicator on the electronic control circuit board 6 Disconnect the dispenser from the power source 12 If the indicator was on or blinking the temperature sensor is operating properly proceed to 7 lf the indicator was off check the sensor connection on the electronic control circuit board and or replace the temperature sensor and the electronic control as sembly NOTE Each temperature sensor is calibrated to an electronic control assembly Both components MUST be replaced as a set 7 Check the voltage across the tank heater terminals with a voltmeter Connect the dispenser to the power source The indication must be 200 to 240 volts ac for 200 to 240 volt models while the red indicator on the circuit board is on or blinking 8 Disconnect the dispenser from the power source If voltage was present as described the temperature control of the system is operating properly If voltage was not present as described contact 0 to order an electronic control assembly temperature sensor and triac assembly for evaluation and proceed to 9 9 Replace the electronic control assembly and tem perature sensor NOTE Each electronic control assembly is calibrated to a temperature sensor Both components MUST be replaced as a Set 10 Check the voltage across the tank heater terminals with a voltmeter Connect the dispenser to
20. oving the two screws attaching the electronic control assembly to its mounting bracket Test Procedure 1 Once voltage is verified at the power source check for continuity across the overflow protection switch red wires only until the plastic float is raised and check that continuity returns when the plastic float is again lowered If continuity is present as described reconnect each of the red wires to the black wires the overflow protection switch is operating properly If continuity is not present as described replace the overflow protection switch 16 Removal and Replacement 1 Disconnect the black wires from the overflow pro tection switch Remove the nut beneath the copper overflow cup Remove the entire switch assembly from the cup Place the new switch assembly into the cup wires first Make sure that a gasket is in place around the threaded switch stem 2 3 4 NOTE The magnets must be at the top of the float and there must be NO stainless steel washers installed for the overflow protection switch to operate properly 5 Install the nut beneath the copper overflow cup Be sure not to overtighten 6 Reconnect the wires FIG 8 1 RED to BLK Wire from Terminal Block ee H P1777 L FIG 8 OVERFLOW PROTECTION WIRING RED to BLK Wire from Electronic Control 3 10889 091599 SERVICE cont Solenoid Valve Location The solenoid valve is locat
21. purchased direct from Bunn O Matic M2522 1000 1 2 Remove the existing triac assembly held in place with a 10 32 hex keps nut Apply a small amount of the silicone heat sink compound to the copper heat sink Securely fasten the new triac assembly to the rear panel in the same relative position as the one removed Bunn O matic recommends tightening the nut to a torque setting of approximately 18 inch pounds Disconnect the other ends of the old triac assembly wires Connect the TAN and BLU wires with spade termi nals of the new assembly to the electronic control assembly FIG 2 Connect the BLU wire with the ring terminal to the tank heater FIG 12 Connect the WHI VIO wire of the new assembly to the RED terminal at the terminal block 10889 091599 SERVICE cont Limit Thermostat Limit Thermostat Location The limit thermostats are located on the tank lid To test the limit thermostats access will also be needed to the terminal block located on the side of the dispenser P1993 FIG 5 LIMIT THERMOSTAT Test Procedure 1 Disconnect the dispenser from the power source 2 There are two black wires on the limit thermostat terminals One comes from the terminal block The other goes directly to the tank heater terminal Re move the black wire at the limit thermostat coming from the terminal block Check the voltage across the black wire removed from the lim
22. specified 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 profits 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 BrewWlSE BUNN Gourmet Ice BUNN Pour O Matic BUNN Bunn OMatic Bunn O Matic BUNNlink BUNNserve BUNN Espress DBC Dr Brew Dual EasyClear EasyGard Easy Pour FlavorGard Gourmet Ice Gourmet Juice High Intensity IMIX Infusion Series Legendary for Quality The Mark of Quality in Beverage Equipment Worldwide My Caf Power Logic Safety Fresh Scale Pro Single Smart Funnel Smart Hopper Soft Heat SplashGard System ThermoFresh 392 AXIOM Beverage Profit Calculator Beverage Bar Creator BrewLOGIC BrewMETER BrewWIZARD BUNNSERVE BUNNsource Coffee At Its Best Cool Froth Digital Brewer Control Intellisteam Nothing Brews Like a BUNN Pouring Profits
23. sting procedures See page 16 6 10889 091599 TROUBLESHOOTING cont PROBLEM Automatic refill will not operate after drawing hot water Water flows into the tank continu ously Dispenser disconnected from power source Water flows into the tank con tinuously Dispenser connected to power source Water is cold PROBABLE CAUSE 1 Po Po No water Water strainer flow control Overflow protection switch Liquid level system Solenoid valve Solenoid valve Liquid level system Overflow protection switch Limit thermostat REMEDY Check plumbing and shut off valves A Direction of flow arrow must be pointing towards dispenser B Remove the strainer flow control and check for obstructions Clear or replace Refer to Service Overflow protec tion switch for testing procedures See page 16 Refer to Service Electronic con trols for testing procedures See page 11 Refer to Service Solenoid valve for testing procedures See page 17 Refer to Service Solenoid valve for testing procedures See page 17 Refer to Service Electronic con trols for testing procedures See page 11 Refer to Service Overflow protec tion switch for testing procedures See page 16 Refer to Service Limit thermostat for testing procedures See page 15 CAUTION Do not eliminate or bypass limit thermostat Use only r
24. t Tank Heater Location The tank heater is located in the tank lid P1993 FIG 11 TANK HEATER Test Procedure 1 2 Disconnect the dispenser from the power source Check the voltage across the terminals of the tank heater with a voltmeter Connect the dispenser to the power source The indication must be 200 to 240 volts ac for 200 to 240 volt models Disconnect the dispenser from the power source If voltage is present as described proceed to 4 If voltage is not present as described replace the tank heater 4 Remove the tank heater from the tank lid and in spect it for cracks in the sheath If continuity is present as described reinstall the tank heater The tank heater is operating properly If continuity is not present as described replace the tank heater Removal and Replacement 1 Remove the wires to the tank heater 2 Remove the 8 32 nuts from the tank heater flange 3 Remove the tank heater 4 Inspect the tank heater gasket and replace if neces sary 5 Securely install the new tank heater Be certain of a watertight seal 6 Reconnect the wires FIG 12 BLU to Triac Assy BLK to Limit Thermostat P1780 FIG 12 TANK HEATER WIRING 10889 091599 WIRING DIAGRAM SCHEMATIC WIRING DIAGRAM H10XA GRN YEL MAIN ON OFF SWITCH Late Models only BLK LIMIT THERMOSTAT BLK 7 7 WHI VIO TANK HEATER BLK
25. ting 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 e Exercise extreme caution when servicing electrical equipment e Disconnect the dispenser from the power source when servicing except when electrical tests are speci fied Follow recommended service procedures e Replace all protective shields or safety notices PROBLEM PROBABLE CAUSE REMEDY Equipment will not operate 1 No power or incorrect voltage A Check the terminal block for the correct voltage It should be 200 to 240 volts ac across the red and black terminals for 200 to 240 volt models B Check circuit breakers or fuses Refer to Service Overflow protec 2 Overflow protection switch tion switch for te
26. unger Disconnect the dispenser from the power source Reconnect the pink wire to terminal 5 of the elec tronic control assembly lf the sound was heard as described and water will not pass through the solenoid valve there may be a blockage in the water line before or after the solenoid valve or the solenoid valve may require inspection for wear and removal of waterborne particles If the sound was not heard as described replace the solenoid valve Removal and Replacement Remove all wires from the solenoid valve coil Turn off the water supply to the dispenser Disconnect the water lines to and from the solenoid valve Remove the two 8 32 slotted head screws holding the solenoid valve and mounting bracket to the component bracket gt 10889 101807 SERVICE cont Solenoid Valve cont 5 Lift out the solenoid valve 6 Remove the two 10 32 slotted head screws holding the solenoid valve to its mounting bracket 7 Securely install the new solenoid valve to its mount ing bracket The direction of flow arrow must be pointing towards the tank lid 8 Attach the solenoid valve and mounting bracket to the component bracket 9 Securely fasten the water lines to and from the solenoid valve 10 Reconnect the wires FIG 10 WHI BLU to Electronic Contol 1 RED to Terminal Block RED to Electronic Control 5 P1779 FIG 10 SOLENOID VALVE WIRING 10889 091599 SERVICE con
Download Pdf Manuals
Related Search