Bunn Solenoids Models MHG, FPG-2 DBC, LPG-2, G9-2, G9-2 DBC, SERVICE Cont, slide plate section

SERVICE (Cont.)
Solenoids (Models MHG, FPG-2 DBC, LPG-2, G9-2, G9-2 DBC)
		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.
	P608	If the sound is heard as described and the plunger
		remains unable to move or move freely, refer to the
	FIG 46 SOLENOIDS
		slide plate section.
Location:		If the sound is not heard as described, replace the
		solenoid.
	The solenoids are located on the mounting plate
immediately beneath the hoppers.		Removal and Replacement:
Test Procedure:		1. Remove the hopper assy from the grinder.
		2.	Remove the four 8-32 slotted-head screws holding
1.	Unplug the grinder.
			the solenoid coil to the solenoid panel.
2.	Connect a voltmeter across the left or right solenoid
		3.	Feed the white/brown wires through the hole in the
	coil terminals. Plug-in the grinder. Momentarily
			solenoid mounting plate and loosely install the new
	press the Off/On/Start switch to “START” (lower)
			solenoid coil.
	position and release (hopper selector switch must
		4. Look through the collector on the bottom of the
	be corresponding to the suspect solenoid). The
			assy and adjust the slide plate travel distance when
	indication must be 120 volts ac for 120V models
			installing the solenoid coil.
	and 230 volts ac for 230V models.
		5. Push the solenoid plunger into the solenoid coil
3.	Unplug the grinder.
			with your hand while moving the coil forward or
If voltage is present as described, proceed to #4.			backward in its mounting holes.
		6. Securely tighten the mounting screws when the
If voltage is not present as described, refer to the Wiring
			slide plate appears to have no metal showing in
Diagram and check the grinder wiring harness.
			the front or back of the hopper hole.
4.	Separate the connectors on the white/brown wires
		7. Refer to the following illustration when reconnect-
	of the solenoids from the connectors on the grinder
			ing the wires.
	wiring harness (RED/BLK) and the limit thermo-
	stat.	RED/BLK to			WHI/YEL to
5.	Check for continuity across the white/brown wires	Right Solenoid			Timer P4-5
	on the suspect solenoid coil.	RED/BLK to
		Timer P4-7
If continuity is present as described, reconnect the
white/brown wires to the grinder wiring harness, and
proceed to #6.						RED/BLK to
If continuity is not present as described, replace the
		WHI/ORN to			Right	Left Solenoid
solenoid.
		Timer P4-4
6.	Check for continuity across the terminals of the			Left
	limit thermostat.		FIG 47 SOLENOID TERMINALS				P612
		45
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