Bunn service manual Solenoid Valve Dispense FMD-1 & FMD-2

Page 35

SERVICE (cont.)

SOLENOID VALVE (DISPENSE) - FMD-1 & FMD-2 (cont.)

Remove panel and set aside.

3.Remove the two #8-32 securing the auger motor mounting panel to the dispenser housing and the two rear #8-32 screws from the side panels.

4.Tilt auger motor mounting panel forward allowing access to the dispense valve(s).

5.Remove the wires from the solenoid valve.

6.Turn-off the water supply to the dispenser.

7.Drain enough water from the tank 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.

8.Disconnect the water line from the solenoid valve.

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

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

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

12.Refer to Fig. 34 and reconnect the wires.

13.Reassemble auger and hopper components.

RED to Main Harness

 

WHI to Main Harness

 

FMD-1

 

ORN to Main

 

Harness

 

WHI to Main

 

Harness

 

RIGHT

 

TAN to Main Harness

 

LEFT

 

WHI to Main Harness

 

FMD-2

 

FIG. 34 DISPENSE SOLENOID VALVE

P1672

 

TERMINALS

 

SOLENOID VALVE (INLET) - FMD-1 & FMD-2

P1665

FIG. 37 INLET SOLENOID VALVE

Location:

The inlet solenoid is located on the lower right side of the rear panel.

Test Procedures:

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 and 120/240 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 carefully in the vicinity of the solenoid valve for a "clicking" sound as the coil magnet attracts.

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29112 101598

 

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Contents BUNNFMD-1 FMD-2 FMD-1 FMD-2 WarrantyIntroduction User Notices28368.0001 00656.0000FMD-1 only Plumbing Requirements Initial SET-UPElectrical Requirements Electrical HOOK-UPRunning a Rinse Sequence Rinse Timer FMD-2 onlyInitial Fill & Heat Liquid Level ControlCold Beverage SET-UP Optional FMD-2 only CleaningAdjustments Hopper Motor Speed Adjustment FMD-1Draining the HOT Water Tank Probable Cause TroubleshootingProblem Product will not dispenseProbable Cause Remedy See Problem Probable CauseStat for testing procedures. See FMD-1Problem Probable Cause Remedy Dispenser is making unusual Refer to Service Lamp, see page 28 for lamp replacementAuger Drive Components FMD-1 ServiceComponent Access ContentsRetainer Clip Ing panel Retainer Clip Hopper AssemblyHopper Lid Spacer Auger Motor Hopper Base Dust Seal WasherAuger Drive Components FMD-2 Auger Drive Components FMD-1To the rear of the auger motor mounting panel Hopper Hopper Assy Remove auger motor and discard Disconnect the wires from the auger motor 16 to be removedRemove dust seal 17 from auger motor Location Ballast FMD-1 & FMD-2Thermostat Terminals Control Board FMD-2 onlyService Dispense Switch Dispense Switchs FMD-1 & FMD-2 FAN FMD-1 & FMD-2 Dispense Switch Terminals P1449FMD-2 Whipper Motor Terminals P1221 Frother and Whipper Motor FMD-1 shown & FMD-2Hopper Drive Board Hopper Drive Board FMD-1 onlyHopper Drive Board Terminals Hopper Drive Board FMD-1 onlyDoor Assy Upper Panel Lamp Holders Lower Panel Lamp Replacement Refer to FigLevel Control Board and Level Probe FMD-1 only Lamp Replacement Refer toAs assembly Lamp Starter and Socket Refer to LocationLevel Control Board and Level Probe FMD-1 only Reconnect the violet wire to terminalLocation RINSE/RUN Switch FMD-1BLK from Main Harness WHI/BRN to YEL to Control Board J2-3 RINSE/RUN Switch FMD-2WHI/RED to Cold Water Solenoid Valve Solenoid Valve Cold Water OPTIONALFMD-2 onlyFMD-1 Solenoid Valve Dispense FMD-1 & FMD-2 Tank Heater Solenoid Valve Inlet FMD-1 & FMD-2Main Harness Thermostat Tank Heater FMD-1 shown & FMD-2WHI/GRN T7 WHI/BLK T12 Transformer FMD-2 onlySingle Phase Schematic Wiring Diagram FMD-1Schematic Wiring Diagram FMD-2
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FMD-2, FMD-1 specifications

The Bunn FMD-2 is an advanced coffee dispensing machine designed for high-traffic environments, such as cafés, restaurants, and convenience stores. This commercial coffee equipment stands out for its reliability, efficiency, and user-friendly features, making it a preferred choice among coffee retailers.

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