Bunn FPG-2 ユーザーズマニュアル

45

Left

Right

WHI/ORN to 

Timer P4-4

RED/BLK to 

Right Solenoid
RED/BLK to 

Timer P4-7

WHI/YEL to 

Timer P4-5

RED/BLK to 

Left Solenoid

P612

Location:

  The solenoids are located on the mounting plate 

immediately beneath the hoppers.

Test Procedure:

1.  Unplug the grinder.

2.  Connect  a voltmeter across the left or right solenoid 

coil terminals. Plug-in the grinder. Momentarily 

press the Off/On/Start switch to “START” (lower) 

position and release (hopper selector switch must 

be corresponding to the suspect solenoid). The 

indication must be 120 volts ac for 120V models 

and 230 volts ac for 230V models.

3.  Unplug the grinder.

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

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

Diagram and check the grinder wiring harness.

4.  Separate the connectors on the white/brown  wires 

of the solenoids from the connectors on the grinder 

wiring harness (RED/BLK) and the limit thermo-

stat.

5.  Check for continuity across the white/brown  wires 

on the suspect solenoid coil.

If continuity is present as described, reconnect the 

white/brown wires to the grinder wiring harness, and 

proceed to #6.

If continuity is not present as described, replace the 

solenoid.

6.  Check for continuity across the terminals of the 

limit thermostat.

P608

If continuity is present as described, reconnect the 

wires, and proceed to #7.

If continuity is not present as described, replace the 

limit thermostat.

7.  Check the solenoid for coil action when the control 

switch is momentarily pressed to the “START” 

(lower) position and released.  Plug-in the grinder.  

Listen carefully in the vicinity of the solenoid for 

a “clicking” sound as the coil magnet attracts and 

after a period of time, repels the plunger.

8.  Unplug the grinder.

If the sound is heard as described and the plunger 

remains unable to move or move freely, refer to the 

slide plate section.

If the sound is not heard as described, replace the 

solenoid.

Removal and Replacement:

1.  Remove the hopper assy from the grinder.

2.  Remove the four 8-32 slotted-head screws holding 

the solenoid coil to the solenoid panel.

3.  Feed the white/brown wires through the hole in the 

solenoid mounting plate and loosely install the new 

solenoid coil.

4.  Look through the collector on the bottom of the 

assy and adjust the slide plate travel distance when 

installing the solenoid coil.

5.  Push the solenoid plunger into the solenoid coil 

with your hand while moving the coil forward or 

backward in its mounting holes.

6.  Securely tighten the mounting screws when the 

slide plate appears to have no metal showing in 

the front or back of the hopper hole.

7.  Refer to the following illustration when reconnect-

ing the wires.

FIG 46 SOLENOIDS

FIG 47 SOLENOID TERMINALS

41545 122209