Scotsman CME506R, Product Manual

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Service Diagnosis: Controller Diagnostic Light Analysis
CME506R, 656R, 806R: AutoIQ Cubers
January 2000
Page 27
Problem or Symptom Possible Cause Probable Correction
Machine is off Bin is full, ice in cube port Use some ice
Power is off, check lights. If all lights are out, check power supply,
restore power if off
Transformer is open If all lights are out and there is power, check
transformer output for 24 vac
Unit has been switched off
or has finished a Clean
cycle, Off light is glowing
Push and release Freeze button
Unit has Shut Down Check for Refrigeration or Water Error
Unit is off & Water
Diagnostic Light is ON
or BLINKING
Water inlet valve
malfunction
Check water light, if the light blinks 2 times
and repeats, check the water inlet valve for
proper water flow.**
Water pump malfunction Check that pump hose is attached and if
pump is plugged in and working.
Water level sensor may
have failed.
Check float stem, reset machine. If it will not
reset or gives another water error and all else
is OK, replace the water level sensor.
Unit is off and
Refrigeration
Diagnostic Light is ON
or BLINKING
Low discharge or long
freeze cycle
If the refrigeration lite is glowing continuously
there is a probable refrigeration problem
Harvest problem Check refrigeration light. If thelight is blinking
steadily, look for a harvest problem.**On
controllers 17-1 and higher, this also indicates
that cubes were sensed by the bin controls.
Controllers 17-1 and higher, if the lite blinks 2
times and repeats, check for a harvest error -
no cubes sensed.
High Discharge Temp Check refrigeration light. If the light blinks 3
times and then repeats, check for a reason for
high discharge temperatures - fan motor hot
ambient.
Unit does not go into
harvest - exceeds
maximum freeze time
Push and release Off button. Push and
release Freeze button. Check operation.
Push cube size float down, check operation.
Exceeds maximum harvest
time
Check for cause of long harvest cycle**
Unit runs and both
Error Lights are ON
Temperature sensors out
of range
Replace the temperature sensor set (water
and discharge).
Same, only 1 light on Reservoir temp. wrong Check water temp. and sensor.
* Machine may be reset by pushing and releasing the Off button, then pushing and releasing the
Freeze button. ** See following pages