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MDT5N25 & MDT5N40
SERVICE DIAGNOSIS
Symptom
No water is vended
Makes ice, but with excessive
noise
Will not dispense ice
Touch Free ice dispensing system
does not operate water solenoid
or dispense motor
No power to compressor contactor
and auger motor
Possible Cause
Check ice vending system, if no
ice will dispense, check the splash
panel cleaning switch
Check water supply
Check inlet water valve
Mineral scale on auger or
evaporator
Dry top bearing
Dry auger drive gear motor
Auger motor rotor bearings worn
Vibration from loose panel or
tubing
Low water level
Vane turns & ice is available but
will not flow out of bin
Check splash panel cleaning
switch
Check for power to motor or
solenoid
If new touch free sensors do not
fix problem
Power light on, but Bin empty light
not on
Power light not, bin empty light on,
but Low water light on
Electric eyes failed
Thermistor failed
Circuit board failed
May 2001
Page 22
Probable Correction
Allow 2 minutes for system to
reset
Restore water supply
Replace valve if necessary
Clean ice making system with
Scotsman Ice machine cleaner
Check top bearing for proper
lubrication
Check auger drive for proper
lubrication
Replace auger motor
Locate vibrating component and
secure it.
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.
Check position of bin bottom. It
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.
Push to reset or wait 2 minutes for
the board to reset itself
If power, check motor or solenoid.
If no power, replace touch free
sensors
Replace circuit board.
Check for ice between electric
eyes or dirty eyes.
Not enough water.
Water too hot
Replace photo electric eyes
Replace water level sensor
Replace circuit board
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