Bunn FMD-3 service manual Tank Heater Switch Terminals

Page 34

SERVICE (cont.)

TANK HEATER SWITCH (cont.)

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the black wire from the power supply and the black wire from the control thermostat.

3.With the switch in the “ON” lower position check for continuity between the center and the upper terminal. With the switch in the “OFF” upper posi- tion no continuity should be present between center and upper terminals.

If continuity is present as described, the heater “ON/ OFF” switch is operating properly.

If continuity is not present as described, replace the switch.

Removal and Replacement:

1.Refer to the hopper section in this manual and remove the hopper assemblies and the hopper support plate.

2.Remove the switch mounting nut on the front of the front panel.

3.Remove switch with wires attached from the rear of the front panel.

4.Remove the wires from the switch terminals and discard switch.

5.Connect the wires to the new switch, refer to fig. 35.

5. Push new switch through hole in the front panel and secure with face nut.

7.Refer to the hopper section in this manual and install the hopper support plate and the hopper assemblies.

BLK to Control Thermostat (Mechanical Thermostat) WHI/BRN to Control Thermostat (Electronic Thermostat)

BLK from Power Supply (Mechanical Thermostat) WHI/BRN to Control Thermostat (Electronic Thermostat)

P1219

FIG. 35 TANK HEATER SWITCH TERMINALS

34	28364 071598

Image 34

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 RemedyReplacement Control thermostat TroubleshootingStat for testing procedures. See 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 BallastContents Component AccessAuger Drive Components 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 motorBallast Refer to when reconnecting the wiresHarness BLK to BLU From Door Interconnect Remove temperature probe from the tank Control ThermostatControl Thermostat Dispense SwitchLocation FAN Dispense SwitchLocation 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 graphicLamp Starter and Socket As assemblyLevel Control Board and Level Probe Level Control Board and Level Probe Limit Thermostat Limit ThermostatFrom Main Harness Overflow Protection SwitchBoard 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 Switch Main Wiring Thermostat HarnessTank Heater Tank Heater Switch Tank Heater Switch TerminalsSchematic Wiring Diagram FMD-1, FMD-2, & FMD-3 Schematic Wiring Diagram FMDA-1, FMDA-2, & FMDA-3