Bunn T3 Service Manual Page 1

H10X/H5XH5E/DV PCH5 ELEMENTWith Digital Control BoardSERVICE MANUALBUNN-O-MATIC CORPORATION POST OFFICE BOX 3227SPRINGFIELD, ILLINOIS 62708-3227PHONE:

10Electronic Controls (cont.)7. Reconnect the pink wire to terminal 5 of the elec-tronic control assembly.8. Loosen the compression fi tting, remove

11SERVICE (cont.)Electronic Controls (cont.)If voltage was present as described, the temperature control of the system is operating properly.If voltag

12SERVICE (cont.)Limit ThermostatLocation:The limit thermostat is located on the tank lid.To test the limit thermostat, access will also be needed to

13SERVICE (cont.)Safety Overfl ow SwitchLocation:The safety overfl ow switch is located inside the rear of the dispenser inside the copper overfl ow cup.

14SERVICE (cont.)Solenoid Valve (Late Models)Location:The solenoid valve is located inside the rear of the dispenser on the right side near the bottom

15Solenoid Valve (Early Models)Location:The solenoid valve is located behind the large access panel on the left side of the dispenser.To test the sole

16SERVICE (cont.)Tank HeaterLocation:The tank heater is located in the tank lid.Test Procedure:1. Disconnect the dispenser from the power source.2.

Steam Sensor (Thermistor)Location:The thermistor is located on the end of the overfl ow tube above the overfl ow cup.To test the thermistor, access will

SERVICE (cont.)Dispense Valve (PC Only)Location:The Dispense Valve is located behind control panel.Test Procedures:1. Check the valve for coil actio

42311 07131019RELAYN.O.COM31542FACTORY J1-1 J1-5 H5-PCNO JUMPEREarly H5E, H5X, H10XInstall jumper thru ver. 1.04 J3-1 J3-5 J5-1 J4-1

2BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTYBunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:1) All equipment other than as s

42311 07131020230V AC 2 WIRE + GNDSINGLE PHASERELAYN.O.COM31542FACTORY J1-1 J1-5 H5-PCNO JUMPEREarly H5E, H5X, H10XInstall jumper thru ver. 1.04

42311 07131021BLU-14BLK-14BLK-14TANK HEATERBLK-14LIMIT THERMOSTAT200-240 VOLTS AC2 WIRE + GNDSINGLE PHASEUSED ONH5X ONLYRELAYN.O.COM31542FACTORY J1-

42311 07131022USED ONH5X ONLYRELAYN.O.COM31542FACTORY J1-1 J1-5 H5-PCNO JUMPEREarly H5E, H5X, H10XInstall jumper thru ver. 1.04 J3-1 J3-5

42311 05051123RELAY31542 J1-1 J1-5 J3-1 J3-5 J5-1 J4-1 J6-1 J7PINK-22GRN-18WHI/BLU-18TANKt°MAINCONTROLBOARD12340-13.8VAC0-3.3VD

42311 05051124RELAY J1-1 J1-5 J3-1 J2-1 J4-1 J2MAINCONTROLBOARD1234+-+-USED ONH5X ONLY100-240V AC 2 WIRE + GNDSINGLE PHASEPINKBLKWHIT

3WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualifi ed service personnel. Disconnect the dispenser f

4TROUBLESHOOTINGA troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem r

5TROUBLESHOOTING (cont.)Problem Probable Cause Remedy Equipment will not operate (cont.)Automatic refi ll will not oper-ate after drawing hot water.Wat

6TROUBLESHOOTING (cont.)Problem Probable Cause Remedy Water boils continuously.Dispenser is making unusual noises.Ready indicator will not light.1. Te

7Faceplate Removal - H5 ELEMENT: After removing top cover, remove the two upper screws securing the faceplate. Carefully lift faceplate straight up un

8SERVICEElectronic ControlsFIG. 8a ELECTRONIC CONTROLP4093.35Voltage present atSolenoid Valve?Voltage present atSolenoid Valve?Overflow Cup Full?Remov

9SERVICE (cont.)Electronic Controls (cont.)Liquid Level Control Test Procedure1. Disconnect the dispenser from the power source.2. Check the voltage