SERVICE DIAGNOSIS
Symptom
Possible Cause
Probable Correction
No ice made, nothing operates
Unit off due to no power
Restore power
Unit off due to master switch in
OFF position
Switch master switch to ON
Unit off due to low water level
Check water supply, filter,
strainer, float valve. Correct
water supply
Unit off due to ice level sensors
(photo-electric eyes) blocked
Check/clean ice level sensors
Unit off due to scale on water
level sensor
Clean water level sensor
Unit off due to water
temperature too high
Thermistor will shut down unit at
temperatures over 110
o
F.
Unit off due to auger motor
overloaded (only up to serial
number 804817-05M)
Check for: Scale on auger or
evaporator; top bearing wear or
lubrication; auger drive gear
reducer for wear.
Unit operates, no ice is vended
Check for ice in the bin
If no ice, check that ice maker
can make ice
Check that machine cannot
keep up with needs
Check for jam up of ice in
dispense chute
Pull chute down and allow ice to
fall out. Return chute to its
normal place.
If there is ice, check that the bin
vane rotates. if not
Check for power to the bin drive
motor, if none, check condition
of Touch-Free ice sensor.
If there is power to the bin drive
motor, but the vane does not turn
Disconnect electrical power,
remove all ice, check
mechanical condition of ice
vane. Replace if broken.
If ice vane is mechanically
sound, check bin drive, replace
if broken.
Compressor on, auger motor is
off
Auger motor windings open
Replace auger motor
Contactor stuck
Replace contactor
Compressor does not operate
Off due to high pressure control
open
Check condenser, fan motor,
fan blade, or water supply on
water cooled.
Contactor coil is open
Replace contactor
Contactor contacts do not make
Replace contactor
Start capacitor failed
Replace start capacitor
Potential relay failed
Replace relay
Compressor windings open
Replace compressor
Compressor locked
Replace compressor
TDE550 & TDE650
November 1995
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