Bunn FMD-4 Manual De Usuario

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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, hopper(s), hopper support plate, splash guard,
splash panel w/drip tray, lower front access panel  and
rear access cover.

Refer to the contents listing for component loca-

tion.

Auger Drive Components (FMD-4) ....................... 13
Auger Drive Components (FMD-5) ....................... 15
Ballast ................................................................... 18
Control Thermostat ............................................... 19
Control Board ....................................................... 20
Dispense Switch ................................................... 23
Fan ........................................................................ 25
Frother .................................................................. 26
Increase/Decrease Switch ..................................... 28
Lamp Holder ......................................................... 29
Lamp .................................................................... 29
Lamp Starter and Socket ...................................... 30
Limit Thermostat .................................................. 31
Rinse/Run Switch ................................................. 32
Hot/Cold Switch-Optional ..................................... 33
Solenoid (Cold Water - Optional) .......................... 34
Solenoid (Dispense) ............................................. 35
Solenoid (Inlet) ..................................................... 37
Tank Heater ........................................................... 38
Tank Heater Switch ............................................... 39
Tank Heater Relay ................................................. 40
Transformer .......................................................... 41
Whipper Motor ..................................................... 27
Wiring Diagram .............................................. 42-45

FIG. 1  AUGER DRIVE COMPONENTS

Location

The auger components are located inside the

bottom part of the hopper except for the auger drive
bracket, spacer and retaining clip, which are located
on the outside rear of the hopper base. The auger
motor is located on the  lower right rear of the motor
mounting panel. Refer to Fig. 2 for disassembly and
assembly.

Test Procedures - Auger Motor
1.

Disconnect the dispenser from the power source.

2.

Disconnect the white/red wire and the white wire
from the hopper speed control board.

3.

Check the voltage across the white/red wire and
the white wire with a voltmeter. With the rinse/
run switch in the run (lower) position, connect
the dispenser to the power supply. The indica-
tion must be :
a) 120 volts ac for two wire 120 volt models.
b) 120 volts ac for three wire 120/208 volt or
120/240 volt models.

4.

Disconnect the dispenser from the power sup-
ply.

If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the wir-
ing diagram and check the dispenser wiring harness.

P2635

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