Scotsman Ice Service Diagnosis, SCN60 Service, Problem, Likely Cause, Probable Solution

SCN60

Service

Service Diagnosis

Problem	Likely Cause	Probable Solution
	No power	Plug unit into power supply
	Unit switched off	Push and release on/off button
		Restore water supply, check sensor. If
		RO water is too pure, unit cannot
	No water, water diagnostic light is on	operate.
		Check float valve for restriction
		Check float valve shut off lever position
		Check auger motor for voltage, if none,
	Compressor on, fan on, auger motor not	replace controller. If there is voltage,
	operating	check auger motor windings, if open,
		replace auger motor.
		Check evaporator for ice. Thaw out and
		retry. Check top bearing and condition of
	Compressor on, fan on, auger motor	auger. Replace if worn.
		Operate unit for a short time with auger
	cutting off on over amp safety
		out of machine, water shut off and water
		sensor bypassed. If auger motor still
		overloads, replace gear reducer.
		Check fan blade for ease of rotation,
No ice	Compressor on, auger on, fan blade not	remove any blockage and retry. Check
	turning	fan motor, replace if not turning freely or
		motor windings open.
	Auger motor on, fan on, compressor not	Check compressor start relay, check
	drawing power	compressor windings.
	Auger motor on, fan on, compressor	Check compressor. See component
	cutting off on overload	diagnostics.
	Compressor on, fan on, auger motor on,	Check ice sweep. If tight to auger, auger
		is not turning. Gears stripped, replace
	ice sweep not turning
		gear reducer.
		Check connections to auger motor, if
	Unit off on auger motor open safety	voltage to motor and it does not operate,
		replace motor.
		If pump model check for water back up
		or open safety switch.
		Check transformer, replace if not
	Unit plugged in but no power	supplying 12 volts AC to controller.
		Check switch membrane. See
		component diagnostics.
		If transformer and membrane are good,
		replace controller.

May 2011

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