Bunn FMD-3 service manual Solenoid Valves Dispense, Solenoid Valve Inlet

Page 31

SERVICE (cont.)

SOLENOID VALVES (DISPENSE) (cont.)

3.Drain enough water from the tank (approximately 1.0 gallon) so the water level is below the dispense valve mounting hole.

NOTE: Bunn-O-Matic has a syphon assembly, #12440.0000. available for this purpose.

4.Disconnect the water line from the solenoid valve.

5.Remove the #10-32 screw securing the solenoid valve to side of the tank. Remove solenoid valve.

6.Using the #10-32 screw install new solenoid valve on side of the tank

7.Push the water line onto the tube on bottom of solenoid valve.

8.Refer to Fig. 29 when reconnecting the wires.

 

FMD-2 & 3

TAN to Jumper Plug

FMD-3 ONLY

 

or to Cold Switch

FMD-2 & 3

WHI to Main

 

Harness

 

SOLENOID VALVE (INLET)

P1445.40

FIG. 30 INLET SOLENOID VALVE

Location:

The inlet solenoid is located inside on the left rear of the dispenser housing.

Test Procedures:

ORN to Auger Motor

WHI to Main Harness

WHI/VIO to Auger Motor

WHI to Main Harness

FIG. 29 DISPENSE SOLENOID VALVE

TERMINALS

P1453.90

1.Disconnect the dispenser from the power source.

2.Disconnect the white and violet wires from the solenoid valve.

3.Check the voltage across the white and violet wires with a voltmeter. Connect the dispenser to the power source. The indication must be 120 volts ac for two wire 120 volt models, three wire 120/208, 120/240 volt models and 240 volts ac for two wire 240 volt models.

4.Disconnect the dispenser from the power source,

If voltage is present as described, proceed to #5

If voltage is not present as described, refer to the wiring diagram and check dispenser wiring harness.

5.Check for continuity across the solenoid valve coil terminals.

If continuity is present as described, reconnect the white and violet wires to the solenoid.

If continuity is not present as described, replace the solenoid valve.

6.Check the solenoid valve for coil action. Connect the dispenser to the power source. Listen care-

31

28364 011598

 

Page 30 Page 32
Image 31
Page 30 Page 32
Contents Phone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisFMD-2 FMD-3 BUNN-O-MATIC Commercial Product WarrantyFMD-2 00656.0000 00831.000028368.0000 26536.0002Initial SET-UP Plumbing HOOK-UP Initial Fill & HeatDraining the HOT Water Tank Remedy Problem Probable CauseReplacement Control thermostat TroubleshootingStat for testing procedures. See Cold Product overflows container Dispense switchDripping from dispense tip Lime build-up LeaksProbable Cause Remedy ProblemDisplay not lit Lamp Lamp Holder Starter Lamp Ballast Refer to Service Lamp, see page 23 for lamp replacementDispenser is making unusual Noises Water Supply Tank Heater Excess dust FanContents Component AccessAuger Drive Components Auger Drive Shaft Optional Bushing Ejector Elbow Hopper Lid Auger Wire Agitator Disc AssyIf voltage is present as described, proceed to #5 Off of the auger drive shaftRemove dust seal 18 from auger motor Auger Drive ComponentsBallast Refer to when reconnecting the wiresHarness BLK to BLU From Door Interconnect Control Thermostat Remove temperature probe from the tankControl Thermostat Dispense SwitchLocation FAN Dispense SwitchLocation Washer Ring Nut Frother FANFrother and Whipper Motor Steam Collector Ring Mixing Chamber #8-32 Acorn NutFrother and Whipper Motor Whipper Motor Terminals P1451.40 Hopper Delay BoardDisconnect the wires from the switch termi- nals HOT/COLD Switch OptionalRemove the outside window and display graphic Lamp Replacement Refer to FigLamp Holder Door Assy Upper Panel Lamp Holders Lower PanelLamp 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 SwitchCold Water Solenoid Valve Solenoid Valve Cold Water OptionalSolenoid Valves Dispense Cold Water Solenoid TerminalsSolenoid Valve Inlet Solenoid Valves DispenseTank Heater Solenoid Valve InletTank Heater Switch Main Wiring Thermostat HarnessTank Heater Tank Heater Switch Terminals Tank Heater SwitchSchematic Wiring Diagram FMD-1, FMD-2, & FMD-3 Schematic Wiring Diagram FMDA-1, FMDA-2, & FMDA-3
Top Page Image Contents