Bunn FMDA DBC-3 Mode D'Emploi

15

This section provides procedures for testing and

replacing various major components used in this
dispenser should service become necessary.  Refer to
Troubleshooting for assistance in determining the
cause of any problem.
WARNING - Inspection, testing, and repair of electri-
cal equipment should be performed only by qualified
service personnel.  The dispenser should be un-
plugged when servicing, except when electrical tests
are required and the test procedure specifically states
to plug in the dispenser.

COMPONENT ACCESS
WARNING - Disconnect the dispenser  from the power
source before the removal of any panel or the replace-
ment of any component.

All components are accessible by opening  the

door, removal of the door panels, dispenser top cov-
ers, hoppers, hopper support plate, splash guard,
splash panel w/drip tray, lower front access panel, side
and rear access covers.

Auger Drive Components ...................................... 15
Auger Motor ......................................................... 18
Auxiliary Control Board ......................................... 19
Ballast ................................................................... 21
Control Board ....................................................... 22
Control Thermostat ............................................... 24
Digital Touch Control Switch ................................ 26
Fan ........................................................................ 28
Frother .................................................................  28
Hot/Cold Switch .................................................... 30
Lamp Holder ......................................................... 31
Lamp .................................................................... 32
Lamp Starter and Socket ...................................... 32
Limit Thermostat .................................................. 33
Overflow Protection Switch .................................. 33
Rinse/Run Switch ................................................. 34
Solenoid (Cold Drink - Optional) ........................... 35
Solenoid (Dispense) ............................................. 36
Solenoid (Hot Water - Optional) ........................... 37
Solenoid (Inlet) ..................................................... 38
Tank Heater .......................................................... 39
Tank Heater Switch ............................................... 40
Transformer .......................................................... 41
Whipper Motor ..................................................... 28
Wiring Diagrams ................................................... 43

FIG. 1  AUGER DRIVE COMPONENTS

Location

The auger components are located inside

the bottom part of the hopper except for the auger
drive bracket, washer and locknut, which are located
on the outside bottom rear of the hopper. The auger
motors are located on the rear of the auger motor
mounting panel. Refer to Fig. 2 for disassembly and
assembly.

Test Procedures - Auger motors
1. Disconnect the dispenser from the power source.
2. Disconnect the wires from the motor to be tested.
3. Check the voltage across the positive (white/blue)

wire for the right motor, positive (white/orange)
wire for the center motor or the positive (white/
red) wire for the left motor and the negative
(green) wire with a voltmeter. Connect the dis-
penser to the power supply. With the rinse/run
switch in the run position press the appropriate
dispense switch. After a .6 second delay the indi-
cation must be 4.0 to 24.5 volts dc.

P1682.40

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