Service Diagnosis - Water Cooled - Scotsman Prodigy Plus A Series Service Manual

NH0422, NS0422, FS0522, NH0622, NS0622, FS0822, NH0922, NS0922, FS1222, NH1322, NS1322, FS1522
Air, Water or Remote Service Manual

Service Diagnosis - Water Cooled

Symptom
No ice
Low ice making capacity
Probable Cause
No power
Code 3: No water
Status light is off
Code 1: No ice sensed
Code 2: Auger motor draws too
many amps, controller shut unit off.
Bin Eyes Blocked light is On
Code 4: Refrigeration system over
or under pressure
Everything is in operation, but no
refrigeration effect
Optional bin thermostat is open
Optional ultrasonic system set too
low
Optional ultrasonic system senses
false bin full
Scale build up
Restricted water to evaporator
High discharge pressure
Expansion valve superheat
incorrect
July 2020
Page 38
Possible Correction
If power light is out and there
is power to the unit, check
transformer.
Restore water, check filters, water
level and sensor
Push and release ON switch
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
Check for damage to gear reducer
or auger bearings.
Ice is in the chute.
No ice in the chute. Check position
of sensors, check sensors for scale
build up
Check water flow to condenser;
check for proper flow of water
into evaporator; check refrigerant
charge
Check water regulating valve
Check TXV superheat
Check refrigerant charge
Check thermostat or jumper wire
on blue wires to #5 & #6
Adjust selector switch to a higher
position
Check sensor for proper
installation and operation
Remove scale from evaporator and
water system
Check for air bubble in hose,
change reservoir if found
Check water regulating valve
Check superheat