Scotsman TDE550 Service Manual page 22

TDE550 & TDE650
SERVICE DIAGNOSIS
Symptom
No water is vended
Makes ice, but with excessive
noise
Will not dispense ice
Auger motor off, top light on
board is ON (only up to serial
number 804817-05M).
Touch Free ice dispensing
system does not operate water
solenoid or dispense 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 Replace auger motor
Vibration from loose panel or
tubing
Low water level
Vane turns & ice is available but
will not flow out of bin
Overloaded twice in one hour
Check splash panel cleaning
switch
Check for power to motor or
solenoid
If new touch free sensors do not
fix problem
August 1999
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
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.
Reset on circuit board. Check
for reason auger motor
overloaded: Bearings & scale on
evaporator. Clean & replace
worn parts.
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.