Service manual

Service Diagnosis - Water Cooled
September 2009
Page 38
N0422, F0522, N0622, F0822, N0922, F1222, N1322, F1522
Air, Water or Remote Service Manual
Symptom Probable Cause Possible Correction
No ice
No power
If power light is out and there is
power to the unit, check transformer.
Code 3: No water
Restore water, check filters, water
level and sensor
Status light is off Push and release ON switch
Code 1: No ice sensed
Check for ice flow down chute. if
very slow or no ice being made,
check for refrigeration system failure
Check auger motor for power, if no
power, check controller component
indicator light. If there is power to
the motor, check motor windings
Code 2: Auger motor draws too
many amps, controller shut unit off.
Check for damage to gear reducer
or auger bearings.
Bin Eyes Blocked light is On
Ice is in the chute.
No ice in the chute. Check position
of sensors, check sensors for scale
build up
Code 4: Refrigeration system over
or under pressure
Check water flow to condenser;
check for proper flow of water into
evaporator; check refrigerant charge
Code 4: Chute thermostat opened
Unit overfilled, check photo eye
system
Everything is in operation, but no
refrigeration effect
Check water regulating valve
Check TXV superheat
Check refrigerant charge
Optional bin thermostat is open
Check thermostat or jumper wire on
blue wires to #5 & #6
Optional ultrasonic system set too
low
Adjust selector switch to a higher
position
Optional ultrasonic system senses
false bin full
Check sensor for proper installation
and operation
Low ice making capacity
Scale build up
Remove scale from evaporator and
water system
High discharge pressure Check water regulating valve
Expansion valve superheat incorrect Check superheat