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Bunn H5E - page 1
H10X/H5X H5E/DV PC H5 ELEMENT With Digital Control Board SER VICE MANU AL BUNN-O-MA TIC CORPORA TION POST OFFICE BO X 3227 SPRINGFIELD , ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 T o 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. ...
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Bunn H5E - page 2
BUNN-O-MA TIC COMMERCIAL PRODUCT WARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCP/MCA pod brewers thermal ser vers and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor . 2) All other equipment - 2 ...
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Bunn H5E - page 3
3 WARNING - Inspection, testing, and repair of electrical 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 specifically states to connect the dispenser to the power source. 42311 071310 CONTENTS T rouble ...
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Bunn H5E - page 4
4 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 T echnical Ser vice Department. • Inspection, testing, and repair of electrical equipment should be performed only by qu ...
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Bunn H5E - page 5
5 TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Equipment will not operate (cont.) Automatic refill will not oper - ate after drawing hot water . Water flows into the tank con- tinuously (Dispenser discon- nected from power source). Water flows into the tank con- tinuously (Dispenser connect- ed to power source). Water is cold. 2. Safety ...
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Bunn H5E - page 6
6 TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Water boils continuously . Dispenser is making unusual noises. Ready indicator will not light. 1. T emperature control 2. Lime build-up 1. Plumbing lines 3. Water supply 1. T emperature control 2. Ready Indicator LED Refer to Service – electronic controls for testing procedures. Inspect the ...
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Bunn H5E - page 7
7 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. The check valve, electronic control assembly , safety overflow switch, solenoid valve, overflow tube tempera - ture sensor and terminal block are l ...
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Bunn H5E - page 8
8 SERVICE Electronic Controls This eq ui pment i s to be instal l ed to comply wit h the B asi c Pl umbing Code of th e Bui l ding Officials and C ode A dminist ra t ors I nter nati o nal , Inc . (B OCA) and the Foo d Serv i c e S anitation Ma nual of the Foo d a nd D r ug Admini str at i on (FDA). FIG. 8a ELECTRONIC CONTROL P4093.35 Vo ltage prese ...
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Bunn H5E - page 9
9 SERVICE (cont.) Electronic Controls (cont.) Liquid Level Control T est Procedure 1. Disconnect the dispenser from the power source. 2. Check the voltage across terminals 3 & 4 of the electronic control 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 ...
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Bunn H5E - page 10
10 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 ...
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Bunn H5E - page 11
11 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 temperature sensor for evaluation and proceed to #9. 6. Replace the electronic control board. 7. Chec ...
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Bunn H5E - page 12
12 T his 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 Administr atio n (FDA). SERVICE (cont.) Limit Thermostat Location: The limit thermostat is located on the tank lid. T o test the limit t ...
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Bunn H5E - page 13
13 SERVICE (cont.) Safety Overflow Switch Location: The safety overflow switch is located inside the rear of the dispenser inside the copper overflow cup. For testing or removal of the safety overflow switch, access may also be needed by removing the two screws attaching the electronic control assembly to its mount - ing bracket. T est Procedur ...
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Bunn H5E - page 14
14 SERVICE (cont.) Solenoid Valve (Late Models) Location: The solenoid valve is located inside the rear of the dispenser on the right side near the bottom. T o test the solenoid valve, access will also be needed to the electronic control board. sound after approximately 5 seconds, as the coil magnet attracts the plunger . 8. Disconnect the dispense ...
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Bunn H5E - page 15
15 Solenoid Valve (Early Models) Location: The solenoid valve is located behind the large access panel on the left side of the dispenser . T o test the solenoid valve, access will also be needed to the electronic control board. BUNN 90 psig max operating pressure Strainer/Flow Control # 22300.0750 (Repl. Flow Wa sher #20526.0750) (Repl. Screen #237 ...
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Bunn H5E - page 16
16 SERVICE (cont.) T ank Heater Location: The tank heater is located in the tank lid. T est Procedure: 1. Disconnect the dispenser from the power source. 2. Check the voltage across the terminals of the tank heater 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 model ...
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Bunn H5E - page 17
Steam Sensor (Thermistor) Location: The thermistor is located on the end of the overflow tube above the overflow cup. T o test the thermistor , access will also be needed to the electronic control board. SERVICE (cont.) P1993 FIG. 17b LOCA TION H 10X P1993 FIG. 17a LOCA TION H 5X T est Procedure: 1. Disconnect the dispenser from the power source. ...
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Bunn H5E - page 18
SERVICE (cont.) Dispense Valve (PC Only) Location: The Dispense Valve is located behind control panel. T est Procedures: 1. Check the valve for coil action. T urn on the valve with the dispense button. Listen carefully in the vicinity of the dispense valve for a click as the coil pulls the plunger in. If no sound is heard as described, proceed to # ...
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Bunn H5E - page 19
42311 071310 19 RELA Y N.O. COM 3 1 5 4 2 FA CT ORY J1-1 J1-5 H5-PC NO JUMPER Early H5E, H5X, H10X Install jumper thru ve r. 1.04 J3-1 J3-5 J5-1 J4-1 J6-1 NO TE: no jumper used on any Model star ting with ve r. 1.08 J2 J7 MAIN CONTROL BOARD 1 2 3 4 + - + - USED ON H5X ONL Y White Strip-T ac Plus Blac k Ink ~ No Reduction Finished Size: 5.5” x 8.0 ...
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Bunn H5E - page 20
42311 071310 20 230V AC 2 WIRE + GND SINGLE PHASE RELA Y N.O. COM 3 1 5 4 2 FA CT ORY J1-1 J1-5 H5-PC NO JUMPER Early H5E, H5X, H10X Install jumper thru ve r. 1.04 J3-1 J3-5 J5-1 J4-1 J6-1 NO TE: no jumper used on any Model star ting with ve r. 1.08 J2 J7 MAIN CONTROL BOARD 1 2 3 4 + - + - USED ON H5X ONL Y White Strip-T ac Plus Blac k Ink ~ No Red ...
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Bunn H5E - page 21
42311 121312 21 200V AC 2 WIRE + GND SINGLE PHASE RELA Y 3 1 5 4 2 FA C T O R Y J1-1 J1-5 H5-PC NO JUMPER Early H5E, H5X, H10X Install jumper thru ver . 1.04 J3-1 J3-5 J5-1 J4-1 J6-1 NOTE: no jumper used on any Model starting with ver . 1.08 J2 MAIN CONTROL BOARD + - + - USED ON H5X ONL Y White Strip-T ac Plus Black Ink ~ No Reduction Finished Size ...
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Bunn H5E - page 22
42311 071310 22 BLU-14 BLK-14 BLK-14 T ANK HEA TER BLK-14 LIMIT THERMOST AT 200-240 VOL TS AC 2 WIRE + GND SINGLE PHASE USED ON H5X ONL Y RELA Y N.O. COM 3 1 5 4 2 FA CT ORY J1-1 J1-5 H5-PC NO JUMPER Early H5E, H5X, H10X Install jumper thru ve r. 1.04 J3-1 J3-5 J5-1 J4-1 J6-1 NO TE: no jumper used on any Model star ting with ve r. 1.08 J2 J7 MAIN C ...
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Bunn H5E - page 23
42311 071310 23 USED ON H5X ONL Y RELA Y N.O. COM 3 1 5 4 2 FA CT ORY J1-1 J1-5 H5-PC NO JUMPER Early H5E, H5X, H10X Install jumper thru ve r. 1.04 J3-1 J3-5 J5-1 J4-1 J6-1 NO TE: no jumper used on any Model star ting with ve r. 1.08 J2 J7 MAIN CONTROL BOARD 1 2 3 4 + - + - White Strip-T ac Plus Blac k Ink ~ No Reduction Finished Size: 5.5” x 7.5 ...
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Bunn H5E - page 24
42311 050511 24 RELA Y 3 1 5 4 2 J1-1 J1-5 J3-1 J3-5 J5-1 J4-1 J6-1 J7 PINK-22 GRN-18 WHI/BLU-18 T ANK t° MAIN CONTROL BOARD 1 2 3 4 0-13.8V AC 0-3.3VDC 0-3.3VDC GRY GRY t ° + - + - WHI/VIO-14 RED-18 BLU-14 BLU-14 RED-18 BLK-14 BLK-18 BLK-18 L1 L2 RED RED BLK-18 OVERFLOW PROTECTION SWITCH BLK-14 T ANK HEA TER BLK-14 LIMIT THERMOST A T LIMIT THERM ...
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Bunn H5E - page 25
42311 050511 25 RELA Y J1-1 J1-5 J3-1 J2-1 J4-1 J2 MAIN CONTROL BOARD 1 2 3 4 + - + - USED ON H5X ONL Y White Strip-T ac Plus Black Ink ~ No Reduction Finished Size: 5.5” x 8.0” 100-240V AC 2 WIRE + GND SINGLE PHASE PINK BLK WHI T ANK t° 44657.0000B 05/11 ©2011 BUNN-O-MA TIC CORPORA TION GRY GRY t ° STEAM SENSOR TEMP PROBE + - SCHEMA TIC WIR ...
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