Grindmaster G & MG Series Troubleshooting Guide, Problem, Possible Cause, Solution, Page

Troubleshooting Guide

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

Problem	Possible Cause	Solution
The machine does not cool, or cools	• The space around the machine is	• Allow at least 8” (20cm) between the
only partially, but the compressors	inadequate for ventilation	machine and anything next to it; keep
are running		away from heat sources
	• Freezer is in defrost	• Return to freeze mode
	• The condenser fins are clogged with	• Remove the side panels. Using a
	airborne particles	brush or compressed air clean the
		condenser
	• Fan motor is not running	• Check the fan motor’s electrical
		connections and, if disconnected,
		reconnect. If still not operating,
		replace the motor
	• Refrigerant is leaking	• Locate the leak, eliminate it and
		recharge the system
The machine does not cool or cools	• Electrical components of the	• Replace the malfunctioning
only partially, but one or more of the	compressor(s) are not functioning	components
compressors are not running	• Some electrical connections are not	• Check the contacts and correct those
	complete	that are incomplete
	• One or more of the compressors are	• Replace the compressor(s)
	malfunctioning
	• No current is coming to the “com-	• Check the electrical connections to
	pressor delay” PC board	the PC board as well as the
		transformer feeding the PC board
		and correct
The machine over-freezes, making	• The product brix is too low	• Check the product brix and correct
the auger movement slow or	• The screw setting for the product	• Reset the screw toward the “-”
stopped	consistency control system is set too	position to produce a thinner
	far toward the “+” position	consistency product
	• The limit switch arm is bent away	• Using pliers, straighten the limit switch
	from the gearmotor and prevents	arm
	contact
	• The level of the product in the bowl is	• Add more product or turn the
	too low, exposing the auger	refrigeration “Off”
	• The compressor PC board contacts	• Replace the PC board
	don’t open
The machine is noisy	• The fan motor blades are hitting	• Check and correct
	internal components
The main power switch is “On”. The	• The fuse(s) are blown	• Replace the fuse(s)
unit is not running.	• The pressure cutout switch has	• Clean the condenser or add
	activated	ventilation space around the machine
		(the cutout switch reset is automatic
		when the conditions are corrected)
	• Some electrical connections are not	• Check the contacts and correct those
	complete	that are incomplete
	• The main power is not functioning	• Replace the switch
Product is leaking out of the bowl	• One of the bowl seals is not in place	• Replace or reposition the seals

G & MG Series Granita Machine Page 17