Bunn FMD-3 service manual Problem, Probable Cause Remedy

Page 10

TROUBLESHOOTING (cont.)

PROBLEM

Weak product

PROBABLE CAUSE

REMEDY

1.

Water temperature

Place an empty container beneath

 

 

the dispense tip. Initiate a dispense

 

 

cycle and check the water tempera-

 

 

ture immediately below the dispense

 

 

tip with a thermometer.

 

 

(A) Reading for mechanical thermo-

 

 

stat models should be 180°F to 200°F

 

 

(see thermostat temperature settings

 

 

decal in USER NOTICES on page 3.

 

 

(B) Reading for electronic thermo-

 

 

stat should be185°F to 190°F.

 

 

Adjust the control thermostat to in-

 

 

crease or decrease the water tem-

 

 

perature. Replace if necessary.

2.

Whipper motor

Refer to Service - Whipper Motor for

 

 

testing procedure. See page 19

3.

Frother

Refer to Service - Frother Compo-

 

 

nents. See page 19

4.

Dispense solenoid valve

Refer to Service - Dispense Solenoid

(Hot or Cold)

Valve for test procedures. See page

 

 

29 or 30

5.

Auger drive

Refer to Service - Auger Drive Com-

 

 

ponents. See page 12

6.

Auger spring

Refer to Service - Auger Drive Com-

 

 

ponents. See page 12

7.

Auger motor

Refer to Service - Auger Drive Com-

 

 

ponents. See page 14

8.

Rinse/Run switch

Refer to Service - Rinse/Run Switch

 

 

for test procedures. See page 28

10

28364 011598

 

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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 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
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