Bunn Beverage Dispenser FMD-5 Manual De Usuario

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FIG. 34 LEVEL CONTROL BOARD AND PROBE

Location:

The level control board is located behind the lower 

access panel mounted on the right side of the compo-

nent bracket. 

The Level probe is located on the left center of the 

tank lid just in front of the overflow tube.

Test Procedure:

1.  Disconnect the dispenser from the power source.

2.  Remove the violet wire from terminal 1 & pink wire 

from terminal 4 of the circuit board.

3.  Check the voltage across terminals 2 & 3 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 volt or 

120/240 volt models.

 

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

P1665

4.  Disconnect the dispenser  from the power 

source.

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

If voltage is not present as described, refer to the wiring 

diagram and check the dispenser wiring haness.

5.   Reconnect the violet wire to terminal 1.

6.  Carefully connect a piece of insulated jumper wire 

to terminal 4. Keep the other end of this wire away 

from any metal surface of the dispenser.

7.  Check the voltage across terminals 1 & 3 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 volt or 

120/240 volt models,

 

c) 230 volts ac for two wire 230 volt models, after 

a delay of approximately 5 seconds.

8.  Touch the free end of jumper wire to the component 

bracket. The indication must be 0.

9.  Move the jumper wire away from the component 

bracket. The indication must again 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,

 

c) 230 volts ac for two wire 230 volt models, after 

a delay of approximately 5 seconds.

10. Disconnect the dispenser from the power source 

and remove the jumper wire from terminal 4.

If voltage is present as described, the level control board 

is operating properly, proceed to #11.

If voltage is not present as described, replace the level 

control board.

11. Reconnect the pink wire to terminal 4.

12. Gently pull the probe out of the tank lid and inspect 

for corrosion. Replace it if necessary.

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