Scotsman Ice service manual MDT5N25 & MDT5N40

MDT5N25 & MDT5N40

SERVICE DIAGNOSIS

Symptom	Possible Cause	Probable Correction
No water is vended	Check ice vending system, if no	Allow 2 minutes for system to
	ice will dispense, check the splash	reset
	panel cleaning switch
	Check water supply	Restore water supply
	Check inlet water valve	Replace valve if necessary
Makes ice, but with excessive	Mineral scale on auger or	Clean ice making system with
noise	evaporator	Scotsman Ice machine cleaner
	Dry top bearing	Check top bearing for proper
		lubrication
	Dry auger drive gear motor	Check auger drive for proper
		lubrication
	Auger motor rotor bearings worn	Replace auger motor
	Vibration from loose panel or	Locate vibrating component and
	tubing	secure it.
	Low water level	Check for air-lock in water line to
		evaporator
		Check for thermistor (water level
		sensor) not shutting unit off when
		there is lack of water.
Will not dispense ice	Vane turns & ice is available but	Check position of bin bottom. It
	will not flow out of bin	must have its slot over the ice
		dispense spout.
		Check condition of bin walls. They
		must be smooth and the bin must
		be round. Replace if rough or out
		of round.
Touch Free ice dispensing system	Check splash panel cleaning	Push to reset or wait 2 minutes for
does not operate water solenoid	switch	the board to reset itself
or dispense motor
	Check for power to motor or	If power, check motor or solenoid.
	solenoid	If no power, replace touch free
		sensors
	If new touch free sensors do not	Replace circuit board.
	fix problem
No power to compressor contactor	Power light on, but Bin empty light	Check for ice between electric
and auger motor	not on	eyes or dirty eyes.
	Power light not, bin empty light on,	Not enough water.
	but Low water light on
		Water too hot
	Electric eyes failed	Replace photo electric eyes
	Thermistor failed	Replace water level sensor
	Circuit board failed	Replace circuit board

May 2001

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