Manuals / Bunn / Kitchen Appliance / Coffeemaker

Bunn ITB/ITCB TEMPERATURE PROBE -1 TEMPERATURE PROBE Location, Removal and Replacement CONTINUED

Models: ITB/ITCB ICB/TWIN

1 30

Download 30 pages 63.74 Kb

Page 19

TEMPERATURE PROBE

TEMPERATURE PROBE

FIG. 19-1 TEMPERATURE PROBE

Location:

The temperature probe is inserted through the tank lid assembly.

Test Procedures:

1.Disconnect the brewer from the power source.

2.With a DC voltmeter, check voltage across the two wires at J13 (J3 on ITB) on control board (black probe to black wire, red probe to white wire refer to FIG 19-2). Connect the brewer to the power source. The indication should be between 4vdc (cool) to 1vdc at ready temperature.

3.Disconnect the brewer from the power source.

If voltage is present as described, circuit is working correctly.

If voltage is not present as described, proceed to #4.

4.Disconnect temperature probe from J9 on control board. Check the resistance across the two ter- minals of the temperature probe. The indication should be between 10.5K cool to 870 at ready temperature.

If resistance is to speciﬁcation, replace the control board.

If resistance is not to speciﬁcation, replace the tem- perature probe.

FIG. 19-2 TEMPERATURE PROBE

FIG. 19-3 TESTING TEMPERATURE PROBE

Removal and Replacement:

CONTINUED

19	42461 0911809

Image 19

Bunn ITB/ITCB, ICB/TWIN TEMPERATURE PROBE -1 TEMPERATURE PROBE Location, 2 TEMPERATURE PROBE -3 TESTING TEMPERATURE PROBE

Contents

BUNN-O-MATIC CORPORATION SERVICE & REPAIR MANUALITB/ITCB ICB/TWIN Infusion SeriesBUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY INTRODUCTION CONTENTSReplace all protective shields or safety notices TROUBLESHOOTINGExercise extreme caution when servicing electrical equipment Follow recommended service proceduresRemove Level Probe and check TROUBLESHOOTING cont REFILL CIRCUIT PROBLEMPROBABLE CAUSE REMEDYInspect probe and tank assembly TROUBLESHOOTING cont HEATING CIRCUITPROBLEM Lime build up on temperatureNOTE Volume adjustments must be TROUBLESHOOTING cont BREWING CIRCUITPROBLEM disable the brew lockout featurePROBABLE CAUSE TROUBLESHOOTING contBREWING CIRCUIT cont PROBLEMREMEDY DIAGNOSTICSMESSAGE PROBABLE CAUSEFIG. 10-3 ICB TWIN COMPONENT ACCESS COMPONENT ACCESSFIG. 10-1 ICB COMPONENT ACCESS FIG. 10-2 ITB/ITCB COMPONENT ACCESSFaceplate Removal and Replacement Test ProceduresCheck for Power to board Removal and ReplacementTest Procedures MEMBRANE SWITCHFIG. 12-1 MEMBRANE SWITCH Location FIG. 12-2 MEMBRANE SWITCH CONTINUITYFIG. 13-2 EXPLODED VIEW BREW VALVE EARLY MODELS AND BYPASS VALVE ON ALL ICBsFIG. 13-1 EARLY BREW VALVE Location If no sound is heard as described, proceed to #4Removal and Replacement BREW VALVE LATE MODELS FIG. 14-1 LATE MODEL BREW VALVE LocationFIG. 14-2 LATE MODEL BREW VALVE Test ProceduresIf the sound is not heard as described, pro- ceed to # DisassemblyREFILL VALVES FIG. 15-1 REFILL VALVES Location If voltage is present, proceed to #CURRENT ICB & & ITB REFILL VALVESEARLY ICB EARLY ITCBTest Procedures TANK HEATERSFIG. 17-1 ICB TWIN TANK HEATERS Location FIG. 17-2 DV TANK HEATERSThe limit thermostat is located on the tank lid on the LIMIT THERMOSTATFIG. 18-1 LIMIT THERMOSTAT LocationTest Procedures TEMPERATURE PROBE FIG. 19-1 TEMPERATURE PROBE LocationFIG. 19-2 TEMPERATURE PROBE FIG. 19-3 TESTING TEMPERATURE PROBE Removal and Replacement CONTINUEDFIG. 20-2 CALIBRATION TEMPERATURE PROBE Removal and ReplacementCalibration FIG. 20-1 CALIBRATE TEMP PROBERemoval and Replacement VOLTAGE SELECTOR SWITCH FIG. 21-1 VOLTAGE SELECTOR SWITCH LocationTest Procedure FIG. 21-2 VOLTAGE SELECTOR SWITCH TERMINALSRemoval and Replacement POWER SWITCH FIG. 22-1 POWER SWITCH ICB SHOWN LocationFIG. 22-2 ROCKER SWITCH Test ProcedureSINGLE PHASE SCHEMATIC WIRING DIAGRAM iTCBA, iTCBB200V AC 2 WIRE 230V AC 2 WIRE120/208V AC 3 WIRE SCHEMATIC WIRING DIAGRAMITCB-DV & ITCB-C-DV 120V AC 2 WIREITCB-DV & ITCB-C-DV WITH FACTORY SWEETENERSCHEMATIC WIRING DIAGRAM 120V AC 2 WIRE 120/208V AC 3 WIRE 120/240V AC 3 WIRE SINGLE PHASE120V AC 2 WIRE 120/208V AC 3 WIRE 120/240V AC 3 WIRE SINGLE PHASE SCHEMATIC WIRING DIAGRAM ICB-DV120/208 OR 120/240 SCHEMATIC WIRING DIAGRAM ICB TWIN3 WIRE + GND SINGLE PHASE200V AC 2 WIRE 230V AC 2 WIRE SINGLE PHASE SCHEMATIC WIRING DIAGRAM iCBA, iCBB2 WIRE + GND SINGLE PHASE SCHEMATIC WIRING DIAGRAM ICB TWIN 230V Chassis Ground TERM230 VOLTS AC 120V AC 2 WIRE + GROUND SINGLE PHASE SCHEMATIC WIRING DIAGRAM ITBSINGLE & DUAL DILUTION MODELS AND MODELS w/OPTIONAL SWEETENER