Grindmaster 250 Grinder will not start when, Start button is pushed, Grinder runs or hums but no

Troubleshooting Guide

The following procedures must be performed by a qualified service technician.

CAUTION: Unplug the machine before cleaning or servicing the unit.

Problem	Possible Cause	Solution
Grinder will not start when	• Plug not in outlet properly.	• Install plug in outlet.
Start button is pushed.	• No power to outlet.	• Check outlet with lamp or radio to
		verify outlet has power.
	• Circuit breaker has tripped	• Reset circuit breaker by pushing in
		reset button until you hear a click.
Grinder runs or hums but no	• Shear disc is broken.	• Replace shear disc. See “Shear Disc
coffee is dispensed.		Replacement” section or instructions
		on inside of upper front plate.
		• Remove hopper and clear obstructions.
	• Obstruction in opening to grinding	• Clean auger.
	chamber.
	• Auger has stalled (models 250 &
	250A only).
Excessive amount of chaff	• Defective chaff mixer spring.	• If bent, broken, or missing, replace
flying about.		spring.
		• If stuck open with coffee, clean
		coffee to free spring.
	• Static electricity.	• Tighten all nuts, bolts and screws and
		verify outlet is grounded.
Quantity of coffee dispensed	• Auger stalls (Models 250 & 250A	• Refer to problem as listed below in this
each throw is not the same.	only).	Troubleshooting Guide.
	• Timer delay is not working or	• See “Timer Adjustment” section.
	running long enough.	• Check the length of time the grinder runs.
	• Defective timer.	• If time varies more than plus or minus
		1%, replace timer.
Knobs do not operate	• Coffee beans or bean dust may	• With machine unplugged, clean carrier.
smoothly.	have clogged carrier.
Auger does not turn.	• Coffee beans or bean dust may	• With machine unplugged, clean auger
	have jammed auger.	opening.
Auger will not operate.	• Motor or link is binding.	• Check all alignment of link and motor.
		Check tightness of motor mounting
		screws.
	• Auger motor has burned out.	• Replace motor
	• Wiring harness to motor is loose.	• With machine unplugged, check to see
		if wires are connected to motor.
Circuit breaker continuously	• Insufficient current due to use of	• Plug unit directly into outlet. Do not
trips.	extension cord.	use extension cord.
	• Insufficient current due to	• Designate single line for grinder. Do
	overloaded line.	not use multi-outlet box.
	• Grind setting needs adjustment.	• Adjust grind to coarser setting
		(see “Grind Adjustment” section)

115 & 250 Series Coffee Grinders Page 8