Bunn TB3Q-LP User Manual

SERVICE & REPAIR MANUALBUNN-O-MATIC CORPORATIONPOST OFFICE BOX 3227SPRINGFIELD, ILLINOIS 62708-3227PHONE: (217) 529-6601 FAX: (217) 529-6644417

Page 10SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become ne

Page 11SERVICE (cont.)source. The indication must be: a) 120 volts ac for two wire 120 volt models. b) 200 to 230 volts ac for two wire 200 volt or

Page 12SERVICE (cont.)LIMIT THERMOSTATLocation: The limit thermostat is located inside the rear ofthe hood on the tank lid.Test Procedures:1. Discon

Page 13SERVICE (cont.)TANK HEATERLocation: The tank heater is located inside the tank and secured to the tank lid.Test Procedures:1. Disconnect the

Page 14SERVICE (cont.)LIGHTED ON/OFF SWITCH (TB3/TB3Q)FIG. 14-1 LIGHTED ON/OFF SWITCHP/N 37080.0000Orange lightFIG. 14-2 LIGHTED ON/OFF SWITCH TERMINA

Page 15SERVICE (cont.)ON/OFF SWITCH-TB6/Q (Sweetner ½ Batch Option-TB3/Q)Location:The switch is located on the front control panel.Test Procedure:1.

Page 16SERVICE (cont.)START SWITCHESLocation:The start switch is located in the front of the hood, above and to the right of the brew funnel.Test Proc

Page 17SERVICE (cont.)INLET VALVES Location: The solenoid valve(s) are located inside the trunk on the lower center part of the component bracket. So

Page 18SERVICE (cont.)BREW/DILUTION TIMER (TB3 & TB6) Location: The timer is located in left side of the hood.Test Procedure:NOTE: Do not remove

Page 19SERVICE (cont.)BREW/DILUTION TIMER (TB3 & TB6) (cont.)Triacs:TH-1/MV-1 Brew solenoidTH-2/MV-2 Dilution solenoidFIG. 19-1 BREW/DILUTION TI

Page 241722 012609BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTYBunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:1) All equipmen

Page 20FIG. 20-1 DIGITAL TIMERFIG. 20-2 DIGITAL TIMERDIGITAL BREW TIMER (TB3Q & TB6Q) SERVICE (cont.)Location: The timer is located in left side

Page 21SERVICE (cont.)DIGITAL BREW TIMER (TB3Q & TB6Q) (cont.)Triacs:Q-1/MV-2 Brew solenoid outputMV-1 Line inFIG. 21-1 DIGITAL TIMER TRIACS4

Page 2241722 070209SCHEMATIC WIRING DIAGRAM TB3Q (OPTIONAL) READY INDICATOR BLU/BLK BLK SW. & THERMOSTAT LIMIT THERMOSTAT L1 BLK BLU/BLK BLK GREEN

Page 2341722 070209SCHEMATIC WIRING DIAGRAM TB3, TB3B, TB3-LPOPTIONALREADYINDICATORSWITCH &THERMOSTATLIMIT THERMOSTAT "KEEP WARM" HEATE

Page 2441722 07020937234.0008B 10/08 © 2008 BUNN-O-MATIC CORPORATIONSCHEMATIC WIRING DIAGRAM TB3B W/HALF-BATCH 100 VOLTS AC120 VOLTS AC2 WIRE + G

Page 2541722 070209LIMIT THERMOSTAT BLU/BLK TANK HEATER "KEEP WARM" HEATER STARTL1 N BLK WHI BLK BREWTIMERWHI WHI GREEN WHI/YELWHI/ORABLKWH

Page 26SCHEMATIC WIRING DIAGRAM TB6WHI/ORNBRN/BLKLEFT/OFF/RIGHT SWITCHSW1BSW1DSW1CSW1ATANK HEATERBLK BLU/BLKL1WHIBLKBLKWHISW. &THERMOSTATWHI120 VO

Page 27SCHEMATIC WIRING DIAGRAM TB6QWHI/ORNBRN/BLKLEFT/OFF/RIGHT SWITCHSW1BSW1DSW1CSW1ATANK HEATERBLK BLU/BLKL1WHIBLKBLKWHISW. &THERMOSTATWHI120 V

Page 341722 070209 ContentsTrouble Shooting ...

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

Page 5TROUBLESHOOTING (cont.)Brew cycle will not start (cont.) Water is not hotPROBABLE CAUSEREMEDY3. ON/OFF Switch4. Start Switch5. Timer6. Solenoid

Page 6TROUBLESHOOTING (cont.)Inconsistent beverage level in dispenserConsistently low beverage level in the dispenser Spitting or excessive steaming1.

Page 7TROUBLESHOOTING (cont.)Spitting or excessive steaming (cont.)Dripping from sprayheadWater flows into tank continu-ously (ON/OFF Switch "ON&q

Page 8TROUBLESHOOTING (cont.)Weak beverageDry coffee grounds remain in the funnelBrewer is making unusal noises 1. Filter Type2. Coffee Grind3. Sprayh

Page 9TROUBLESHOOTING (cont.)Brewer is making unusal noises (cont.)4. Tank HeaterRemove and clean lime off the tank heater. PROBLEMPROBABLE CAUSEREME