Service Diagnosis - Scotsman SCE275 Serivce Manual

SCE275

Service Diagnosis

Proper service diagnosis begins with observation, comparing the complaint to the operation of the unit. Ice
machine service diagnosis should proceed from water, to electrical and then to refrigeration.
Problem or Symptom Possible Cause
Machine is off
Unit is off on a Water
Error
Unit is off on a
Refrigeration Error
Unit runs and both
Error Lights are ON
Same, but 1 light is on
* Machine may be reset by pushing and releasing the Off button, then pushing and releasing the Freeze
button. ** See following pages
Bin is full, ice in cube port
Power is off, check LEDs.
Transformer is open
Unit has been switched off
or has finished a Clean
cycle, Off Light is glowing
Unit has Shut Down
Water inlet valve
malfunction
Water pump malfunction
Water level sensor may
have failed.
Low discharge or long
freeze cycle
Harvest problem
High Discharge Temp
Unit does not go into
harvest - exceeds
maximum freeze time
Temperature sensors out
of range
Reservoir temp. wrong
January 2003
Probable Correction
Use some ice
If all lights are out, check power supply, restore
power if off
If all lights are out and there is power, check
transformer output for 24 vac
Push and release Freeze button
Check for Refrigeration or Water Error
Check water Light, if the Light blinks 2 times and
repeats, check the water inlet valve for proper
water flow.**
Check that pump hose is attached and if pump is
plugged in and working.
Check float stem, reset machine. If it will not
reset or gives another water error and everything
else is OK, replace the water level sensor.
Check refrigeration Light. If the Light is glowing,
there is a probable refrigeration problem or on
water cooled a water interruption
Check refrigeration Light. If the Light blinks once
and repeats, look for a harvest problem.** This
also indicates that cubes were sensed by the bin
controls.
If the light blinks 2 times and repeats, check for a
harvest error - no cubes sensed.
Check refrigeration Light. If the Light blinks 3
times and then repeats, check for a reason for
high discharge temperatures - such as a bad fan
motor or very hot ambient.
Push and release Off button. Push and release
Freeze button. Check operation.
Push cube size float down and check operation.
Replace the temperature sensor set (water and
discharge).
Check water temp and sensor.
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