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H5E, H5X
With Digital Control Board
OPERATING & 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
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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 po
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CONTENTS Warranty .......................................................2 Introduction ..................................................3 User Notices .................................................3 Electrical Requirements ................................4 Plumbing Requirements ...............................5 Initial Set-Up .................................................5 Programming ................................................6 Draining the Dispenser ........................
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ELECTRICAL REQUIREMENTS WARNING - The dispenser must be disconnected from the power source until specified in Initial Set-Up. Refer to Data Plate on the Brewer, and local/national electrical codes to determine circuit requirements. L2 RED L2 RED L2 RED L2 RED BLUE WHITE WHITE L2 L2 N N NEUTRAL NEUTRAL L1 BLACK L1 BLACK L1 BLACK L1 BLACK L1 BLACK L1 BLACK BROWN L1 L1 L1 GREEN GREEN G GREEN GREEN GRN/YEL GREEN GREEN G G 120 volt ac models 208 & 240 volt ac models 230 volt ac models Note: This elec
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PLUMBING REQUIREMENTS This dispenser must be connected to a COLD WATER system with operating pressure between 20 and 90 psi 1 (138 and 620 kPa)from a ⁄2” or larger supply line. A shut-off valve should be installed in the line before the dis- penser. Install a regulator in the line when pressure is greater than 90 psi (620 kPa) to reduce it to 50 psi (345 1 kPa). The water inlet fitting is ⁄4” flare. 1 3 NOTE - Bunn-O-Matic recommends ⁄4” tubing for installations of less than 25 feet and ⁄8” f
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PROGRAMMING When power is applied to the dispenser, the display located on the bottom of the main circuit board will show the revision level of the software for 5 seconds, and then go to (-). While the tank is filling, the display will read (FIL). When the tank is full the display will return to (-). P3747 CENTER RIGHT LEFT BUTTON BUTTON BUTTON INITIAL PROGRAMMING OF THE CONTROL BOARD 1. Before programming any settings into the Control Board, confirm the correct machine selection is entered.
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PROGRAMMING (Continued) LEVEL 2 PROGRAMMING FAHRENHEIT OR CENTIGRADE SELECTION, & RESTORING FACTORY DEFAULTS 1. To enter Level 2 Programming, press and hold the center button until H2 appears on the display (approximately 6 seconds). Release the center button, The display will show either FAH (Degrees in Fahrenheit) or CEn (Degrees in Centigrade). 2. Press and release the (+) or (-) buttons to alternate between FAH and CEn. 3. After setting FAH or CEn, to exit Level 2 Programming, press and re
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DRAINING THE DISPENSER CAUTION - The dispenser must be disconnected from the power source throughout these steps. 1. Disconnect the dispenser from the power source. 2. Shut-off and disconnect the incoming water supply 3. Remove the 4-40 screws at the sides of the top panel. 4. Gently remove one of the grommets from the tank lid. 5. Insert a tube to the bottom of the tank and syphon ALL of the water out. NOTE - The dispenser must be full using the INITIAL SET-UP steps before reconnecting to the
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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 per formed only by qualified ser vice person- nel. • All electronic components have 120 – 240 volt ac and low voltage dc potential on their te
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Equipment will not operate 2. Safety overflow switch Refer to Ser vice – safety overflow switch (cont.) for testing procedures. See page 18. Automatic refill will not oper- 1. No water Check plumbing and shut-off valves. ate after drawing hot water. 2. Water strainer/flow control (A) Direction of flow arrow must be point- ing towards dispenser. (B) Remove the strainer/flow control and check for obstructions. Clear or replace. 3. Saf
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Water boils continuously. 1. Temperature control Refer to Ser vice – electronic controls for testing procedures. See page 10. 2. Lime build-up Inspect the tank assembliy for excess lime deposits. Delime as required. CAUTION – T anks and tank components should be delimed reglarly depending on local water conditions. Exces- sive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in s
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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. P1770 The limit thermostat, liquid level probe, tank heater, and temperature sensor are located at the top of the dispe
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SERVICE (cont.) Electronic Controls H5E, H5X LIQUID LEVEL CONTROL PROBLEM: Overflows Drain cup Unplug Ready Lamp Retry No Overflow Replace Ready Lamp ? Yes Drain cup Disconnect Probe Wire From Probe P1772 Short Probe Wire T o Chassis FIG. 1 ELECTRONIC CONTROL Retry Location: No Overflow Replace Probe The electronic control board is located inside the ? rear of the dispenser. Access will also be needed to the Yes temperature sensor, overflow tube temperature sensor, Drain cup Disconnect Wir
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SERVICE (cont.) Electronic Controls (cont.) 4. Remove the pink wire from terminal 5 of the elec- tronic control assembly. Liquid Level Control Test Procedure 5. Check the voltage across terminals 1 & 4 of the 1. Disconnect the dispenser from the power source. electronic control board with a voltmeter. Connect 2. Check the voltage across terminals 3 & 4 of the the dispenser to the power source. The indication electronic control board with a voltmeter. Connect must be: the dispenser to the p
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SERVICE (cont.) If voltage was present as described, reinstall the Electronic Controls (cont.) probe, the sensing function of the system is operating 7. Reconnect the pink wire to terminal 5 of the elec- properly. tronic control assembly. If voltage was not present as described, check the pink 8. Loosen the compression fitting, remove the probe probe wire and the green ground wire for continuity from the tank lid, and inspect it for mineral depos- and/or replace the probe. its. Replace it
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SERVICE (cont.) Electronic Controls (cont.) If voltage was present as described, the temperature control of the system is operating properly. If voltage was not present as described, contact Bunn- O-Matic to order an electronic control board and tem- perature sensor for evaluation and proceed to #9. 6. Replace the electronic control board. T5 PNK to Liquid 7. Check the voltage across the tank heater terminals Level Probe with a voltmeter. Connect the dispenser to the T4 WHI or RED to Termina
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This equipment is to be installed to comply with the Basic Plumbing Code of t l he Building Officia s and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA). SERVICE (cont.) Limit Thermostat If voltage was present as described, reconnect the black Location: wire and proceed to #5. The limit thermostat is located on the tank lid. If voltage was not present as described, refer to the To test the limit thermostat, access
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This equipment is to be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA). SERVICE (cont.) Removal and Replacement: 1. Disconnect the black wires from the safety overflow Safety Overflow Switch switch. 2. Remove the nut beneath the copper overflow cup. 3. Remove the entire switch assembly from the cup. 4. Place the new switch assembly into
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! WARNING SERVICE (cont.) 7. Check the solenoid valve for coil action. Connect Solenoid Valve the dispenser to the power source. Listen carefully Location: in the vicinity of the solenoid valve for a “clicking” The solenoid valve is located inside the rear of the sound after approximately 5 seconds, as the coil dispenser on the right side near the bottom. magnet attracts the plunger. To test the solenoid valve, access will also be needed 8. Disconnect the dispenser from the power source. to
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This equipment is to be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA). SERVICE (cont.) Tank Heater Removal and Replacement: Location: 1. Remove the wires to the tank heater. The tank heater is located in the tank lid. 2. Remove the 8-32 nuts from the tank heater flange. 3. Remove the tank heater. 4. Inspect the tank heater gasket and re
