Bunn FMD-3 service manual Limit Thermostat

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SERVICE (cont.)

LIMIT THERMOSTAT

FIG. 20 LIMIT THERMOSTAT	P1445
FIG. 20 LIMIT THERMOSTAT
Location:

The limit thermostat is located in the center of the tank lid.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect both black wires from the limit ther- mostat.

3.Check for continuity across the limit thermostat terminals.

If continuity is present as described, the limit thermo- stat is operating properly.

If continuity is not present as described, replace the limit thermostat.

Removal and Replacement:

1.Remove all wires from the limit thermostat ter- minals.

2.Carefully slide the limit thermostat out from un- der the retaining clip and remove the limit ther- mostat.

3.Carefully slide the new limit thermostat into the retaining clip.

4.Refer to Fig. 21 when reconnecting the wires.

BLK to Tank Heater

BLK to Control

Thermostat

P1800

FIG. 21 LIMIT THERMOSTAT TERMINALS

26	28364 051100

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Contents Post Office BOX SPRINGFIELD, Illinois Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty FMD-2 FMD-326536.0002 00656.0000 00831.000028368.0000 FMD-2Initial SET-UP Initial Fill & Heat Plumbing HOOK-UPDraining the HOT Water Tank Problem Probable Cause RemedyStat for testing procedures. See TroubleshootingReplacement Control thermostat Leaks Product overflows container Dispense switchDripping from dispense tip Lime build-up ColdProblem Probable Cause RemedyNoises Water Supply Tank Heater Excess dust Fan Refer to Service Lamp, see page 23 for lamp replacementDispenser is making unusual Display not lit Lamp Lamp Holder Starter Lamp BallastAuger Drive Components Component AccessContents Off of the auger drive shaft Hopper Lid Auger Wire Agitator Disc AssyIf voltage is present as described, proceed to #5 Auger Drive Shaft Optional Bushing Ejector ElbowAuger Drive Components Remove dust seal 18 from auger motorHarness BLK to BLU From Door Interconnect Refer to when reconnecting the wiresBallast Remove temperature probe from the tank Control ThermostatLocation Dispense SwitchControl Thermostat Location Dispense SwitchFAN Steam Collector Ring Mixing Chamber #8-32 Acorn Nut FANFrother and Whipper Motor Washer Ring Nut FrotherFrother and Whipper Motor Hopper Delay Board Whipper Motor Terminals P1451.40HOT/COLD Switch Optional Disconnect the wires from the switch termi- nalsDoor Assy Upper Panel Lamp Holders Lower Panel Lamp Replacement Refer to FigLamp Holder Remove the outside window and display graphicLevel Control Board and Level Probe As assemblyLamp Starter and Socket Level Control Board and Level Probe Limit Thermostat Limit ThermostatBoard Overflow Protection SwitchFrom Main Harness Rinse /RUN Switch RINSE/RUN SwitchSolenoid Valve Cold Water Optional Cold Water Solenoid ValveCold Water Solenoid Terminals Solenoid Valves DispenseSolenoid Valves Dispense Solenoid Valve InletSolenoid Valve Inlet Tank HeaterTank Heater Main Wiring Thermostat HarnessTank Heater Switch Tank Heater Switch Tank Heater Switch TerminalsSchematic Wiring Diagram FMD-1, FMD-2, & FMD-3 Schematic Wiring Diagram FMDA-1, FMDA-2, & FMDA-3