Bunn FMD-3 service manual Overflow Protection Switch, SERVICE cont

Models: FMD-3

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OVERFLOW PROTECTION SWITCH

SERVICE (cont.)

OVERFLOW PROTECTION SWITCH

FIG. 22 OVERFLOW PROTECTION SWITCH P1199

Location:

Removal and Replacement:

1.Disconnect the red leads from the overflow pro- tection switch from the black wire from the main harness and the blue wire from the liquid level board.

2.Remove the nut beneath the copper overflow cup.

3.Remove the entire switch assembly from the cup.

4.Place the new switch assembly into the cup, wires first. Make sure that a gasket is in place around the threaded switch stem.

NOTE - The magnets must be at the top of float and there must be NO adjusting washers installed for the overflow protection switch to operate prop- erly.

5.Install the nut beneath the copper overflow cup. Be sure not to overtighten.

6.Refer to Fig. 23 when reconnecting wires.

RED to BLK Wire

 

 

 

RED to BLU Lead

 

 

from Main Harness

 

 

from Liquid Level

 

 

 

 

Board

The overflow protection switch is located in- side the copper overflow cup on the left side of the tank.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Remove the wire nuts connecting the red wires from the overflow protection switch to the black wire from the main harness and blue wire from the liquid level board.

3.Check for continuity across the safety overflow switch red wires only until the plastic float is raised and check that continuity returns when the plastic float is again lowered.

If continuity is present as described, reconnect the red wires to the black wire from the main harness and the blue wire from the liquid level board.

If continuity is not present as described, replace the overflow protection switch.

FIG. 23 OVERFLOW PROTECTION

SWITCH LEADS

P1212

27

28364 011598

 

Page 27
Image 27
Bunn FMD-3 service manual Overflow Protection Switch, SERVICE cont