Bunn U3A Servisní příručka

OPERATING & SERVICE MANUALBUNN-O-MATIC CORPORATIONPOST OFFICE BOX 3227SPRINGFIELD, ILLINOIS 62708-3227PHONE: (217) 529-6601 FAX: (217) 529-6644

Page 10TROUBLESHOOTING (cont.)PROBLEMWater running out of the overflowWater is not hotPROBABLE CAUSE1. Brewer not level2. Solenoid Valve3. Liquid Leve

Page 11PROBABLE CAUSE1. Fuse2. Tank Heater(s)1. Timer2. Start Switch1. Timer2. Solenoid Valve3. Lime build-up in swing spoutand pump tubing.1. Filters

Page 12TROUBLESHOOTING (cont.)Coffee reservoir overflowsBrewer is making unusal noisesPROBABLE CAUSEREMEDY1. Coffee reservoir not completelyempty befo

Page 13P2178.60FIG. 2 CONTACTORLocation:The contactor is located on the left front of thecomponent bracketSERVICEThis section provides procedures for

Page 14SERVICE (cont.)Test Procedures:1. Disconnect the brewer from the power source.2. Disconnect the red wire from the limit thermostatto the contac

Page 15SERVICE (cont.)CONTROL THERMOSTATFIG. 4 CONTROL THERMOSTATP2178.60Location:The control thermostat is mounted on the rightfront of the component

Page 16SERVICE (cont.)Location:The fuse and fuse holder are located on the rightrear of the component bracket.Test Procedures:1. Disconnect the brewer

Page 17LIMIT THERMOSTATSERVICE (cont.)FIG. 9 LIMIT THERMOSTAT TERMINALSFIG. 8 LIMIT THERMOSTATP2178.55Location:The limit thermostat is located on the

Page 18T1 BLU to Solenoid ValveT2 RED to ON/OFF SwitchT3 BLK to Main HarnessT4 PNK to Level ProbeFIG.11 LIQUID LEVEL BOARD TERMINALSP1733.50SERVICE

Page 19SERVICE (cont.)ON/OFF SWITCHFIG.12 ON/OFF SWITCHP2104.25Location :The ON/OFF switch is located on the left side of theswitch mounting bracket.

Page 2INTRODUCTIONThis brewer will brew a three gallon batch of coffee into each reservoir (one at a time). Each reservoir has itsown dispensing fauce

Page 20SERVICE (cont.)PUMP ASSEMBLYFIG.14 PUMP ASSEMBLYP2178.55Location:The pump is located on the center rear of thecomponent bracket.Test Procedures

Page 21SERVICE (cont.)SELECTOR SWITCH (HALF BATCH OPTION)FIG. 16 SELECTOR SWITCH (HALF BATCH)P2104.25Location:The selector switch is located in the up

Page 22BLU from LiquidLevel Board T1FIG. 19 SOLENOID TERMINALSP2110.50SERVICE (cont.)SOLENOIDFIG. 18 SOLENOIDP2178.55Location:The solenoid is mounted

Page 23SERVICE (cont.)START SWITCH (BREW)FIG. 20 START SWITCH (BREW)P2104.25Location:The brew start switch is located on the upper rightside of the br

Page 24SERVICE (cont.)SWING ARM SWITCHFIG. 22 SWING ARM SWITCHLocation:The swing arm switch is attached to the cupolacover.Test Procedures:1. Disconne

Page 25BLK (Thermal Fuse) toTerminal BlockBLU (Thermal Fuse) to Ter-minal BlockBLK (Thermal Fuse) toContactor Lower Left Ter-minalRED (Thermal Fuse) t

Page 26SERVICE (cont.)THERMAL FUSESFIG. 26 THERMAL FUSESP2179.65Location:The thermal fuses are mounted between the tankheater terminals and contactor

Page 27SERVICE (cont.)TIMER (Early Models)OLD STYLE(cont.)If voltage is present as described, proceed to #8.If voltage is not present as described, re

Page 28DIGITAL TIMER (Late Models)FIG. 29 DIGITAL TIMERP2212.55SERVICE (cont.)Location:The timer is located on the front center of thecomponent brack

Page 29SERVICE (cont.)DIGITAL TIMER (Late Models)BLU/BLK wire from TL5 to P1WHI/GRN wire from TL4 to (RED) PumpWHI/BLU wire from TL3 to Swing Arm Swit

Page 3#00831.0000#00656.0000USER NOTICESCarefully read and follow all notices on the brewer and in this manual. They were written for your protection.

Page 3010493.0004A 07/02 © 2002 BUNN-O-MATIC CORPORATION10060.3 070102

Page 4ELECTRICAL REQUIREMENTSCAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up.ELECTRICAL INSTALLATION

Page 5INITIAL SETUPCAUTION - The brewer must be disconnected from the power source throughout the Initial Setup, except whenspecified in the instructi

Page 6ADJUSTING BREW VOLUMESCAUTION - Disconnect the power source from the brewer prior to the removal of any panel for the replacementor adjustment o

Page 7COFFEE BREWING1. Brew cycles may be started whenever water temperature is correct. This condition is indicated by the dialthermometer on front o

Page 8PROBLEMBrew cycle will not startPROBABLE CAUSE1. No water2. No power or incorrect voltage tothe brewer3. Water level below pump housing.(Water l

Page 9TROUBLESHOOTING (cont.)PROBLEMBrew cycle will not start (cont.)Tank not fillingPROBABLE CAUSE6. Start Switch7. Timer8. Pump9. Solenoid Valve10.