Grindmaster 115A instruction manual Troubleshooting Guide

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 START	• Plug not in outlet properly	• Install plug in outlet
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.
	• Obstruction in opening to grinding	• Remove hopper and clear obstructions.
	chamber
	• Auger has stalled (Models 250, 250A	• Clean auger
	250RH-2 & 250RH-3 only).
	• 250RH Models: Hoppers not properly in	• Make sure hoppers are seated in their
	place	allocated area
Excessive amount of chaff flying	• Defective chaff mixer spring	• If bent, broken, or missing,
about		replace 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 each	• Auger stalls (Models 250, 250A,	• Refer to problem as listed below in this
throw is not the same	250RH-2, and 250RH-3 only)	Troubleshooting Guide.
	• Timer delay is not working or running	• See “Timer Adjustment” section
	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 smoothly	• Coffee beans or bean dust may have	• With machine unplugged, clean carrier
	clogged carrier
Auger does not turn	• Coffee beans or bean dust may have	• With machine unplugged, clean auger
	jammed auger	opening
	• 250RH Models: Hopper not properly	• Make sure hopper is seated in its
	seated	designated area (see Figure A)
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
	• 250RH Models: Hopper not properly	• Make sure hopper is seated in its
	seated	designated area (see Figure A)
Circuit breaker continuously trips	• Insufficient current due to use of	• Plug unit directly into outlet. Do not use
	extension cord	extension cord.
	• Insufficient current due to overloaded	• Designate single line for grinder. Do not
	line	use multi-outlet box.
	• Grind setting needs adjustment	• Adjust grind to coarser setting (see
		“Grind Adjustment” section)
		continued on next page
115 & 250 Series Coffee Grinders		Page 8