Bunn Beverage Dispenser FMD-5 Manual De Usuario

18

Removal and Replacement:

1.  Loosen the two #8-32 screws securing the compo-

nent mounting bracket to the dispenser housing.

2.  Slide the component mounting bracket forward until 

the screw heads align with the large diameters of 

the keyhole openings.

3.  Lift the component mounting bracket, and pull it  

through the lower access panel opening.

4.  Disconnect the two plugs on the main wiring har-

ness from the connectors on the auxiliary control 

board.

5.  Remove the two #6-32 keps nuts securing the

 

auxiliary control board to the  component mounting 

bracket.

6.  Remove the auxiliary control board.

7.  Remove the two snap-in stand-offs from the auxiliary 

control board and install them in the new auxiliary 

control board. Discard the old auxiliary control 

board.

8.  Install the new auxiliary control board using the 

two #6-32 keps nuts.

9.  Reconnect the two plugs on the main wiring harness 

to the connectors on the auxiliary control board.

10. Replace the component mounting bracket and 

tighten the two #8-32 screws.

4.  On the dispenser whipper panel, ensure that the tank 

heater switch is in the “ON” (lower) position.

5.  Disconnect the black wire coming from the control 

thermostat from the limit thermostat.

6.  Remove the control thermostat bulb from the 

tank.

7.  With a voltmeter, and using pin 5 as a reference, 

back probe check for voltage, in turn, at pin 3 and 

pin 6 of the six pin J2 connector of the wiring har-

ness. Connect the dispenser to the power source. 

The indication must be :

 

a) 120 volts ac for two wire 120 volt models

 

b) 120 volts ac for  three wire 120/208  or 120/240 

volt models 

 

c) 240 volts ac for two wire 240 volt models.

 

d) 230 volts ac for two wire 230 volt models.

8.  Disconnect the dispenser from the power source.

If voltage is present as described, proceed to step 9. If 

voltage is not present as described, refer to the wiring 

diagram and check the dispenser wiring harness.

9.  Re-install the control thermostat bulb.

10.  Noting the starting position of the control thermostat 

knob, adjust the control thermostat knob counter-

clockwise until a click is heard.

11. With a voltmeter, check for voltage between pins 3 

and 6 of the six pin J2 connector of the wiring har-

ness. Connect the dispenser to the power source. 

The indication must be:

 

a) 120 volts ac for two wire 120 volt models

 

b) 208 volts ac for  three wire 120/208 or 240 volts 

ac for  three wire 120/240 volt models 

 

c) 240 volts ac for two wire 240 volt models.

 

d) 230 volts ac for two wire 230 volt models.

12. Disconnect the dispenser from the power source. 

Return the control thermostat knob to the starting 

position.

If voltage is present as described, replace the  auxiliary 

control board. If voltage is not present as described, 

refer to the wiring diagram and check the dispenser 

wiring harness.

FIG. 7 AUXILIARY CONTROL 

BOARD TERMINALS

P1996.80

J2

J1

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