Bunn Beverage Dispenser FMD-5 Manual De Usuario

17

FIG. 6 AUXILIARY CONTROL BOARD

P4102.40

Location:

The auxiliary control board is located behind the lower 

front access cover, mounted on the rear side of the 

component bracket.

Hot Water Dispense

Test Procedure:

1.  Disconnect the dispenser from the power source.

2.  With a voltmeter, and using the component mount-

ing bracket as a reference (-), back probe check 

for voltage at pin 1 (red wire) of J1. Connect the 

dispenser to the power source. The indication must 

be approximately 37 volts dc.

3.  Disconnect the dispenser from the power source.

If voltage is present as described, proceed to step 5. If 

voltage is not present as described, refer to the wiring 

diagram and check the dispenser wiring harness.

4.  Back probe check the voltage across pins 2 (black 

wire) and 5 (white wire) of the six pin J2 connector 

on the wiring harness with a voltmeter. 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.

5.  Disconnect the dispenser from the power source.

If voltage is present as described, proceed to step 6. If 

voltage is not present as described, refer to the wiring 

diagram and check the dispenser wiring harness.

6.  Check the voltage across the terminals of the hot 

water dispense solenoid with a voltmeter. Connect 

the dispenser to the power source. Press the hot 

water dispense switch. 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.

7.  Disconnect the dispenser from the power source.

If voltage is present as described the hot water dispense 

circuitry is operating properly. If voltage is not present 

as described, replace the auxiliary control board.

Ready Light Circuit

Test Procedure:

1.  Disconnect the dispenser from the power source.

2.  With a voltmeter, and using the component mount-

ing bracket as a reference (-), back probe check 

for voltage at pin 1 (red wire) of J1. Connect the 

dispenser to the power source. The indication must 

be approximately 37 volts dc.

3.  Disconnect the dispenser from the power source.

If voltage is present as described, proceed to step 4. If 

voltage is not present as described, refer to the wiring 

diagram and check the dispenser wiring harness.

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