Service Diagnosis: Diagnostic Light Analysis
CME1856W
November 2001
Page 29
Problem or Symptom
Possible Cause
Probable Correction
Machine is off
Bin is full
Use some ice
Bin thermostat is closed
Check thermostat, unplug the connection to
the controller at terminal 7 and wait 4 minutes.
If the machine starts, the thermostat was
closed and needs to be adjusted or replaced.
If the Bin Full light does NOT go out check the
ice sensors. See next page bottom.
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 manually switched off
Push and release Freeze button
Unit has Shut Down
Check for Refrigeration or Water Error
Unit is off and the
Water Diagnostic Light
is ON or BLINKING
Water supply inadequate
Check water Light, if the Light blinks 2 times
and repeats, check the water inlet valve.**
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 the
Refrigeration
Diagnostic Light is ON
or BLINKING
Low discharge or long
freeze cycle
Check refrigeration Light. If the Light is
glowing, there is a probable refrigeration
problem - Check water supply and/or water
regulating valve.
Harvest problem
Check refrigeration Light. If the Light blinks
once and repeats, look for a harvest problem.
where some cubes were sensed.**
Check refrigeration Light. If the Light blinks
two times and repeats, look for a harvest
problem. - 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.
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 max harvest time
Check for cause of long harvest cycle**
Unit runs and both
Diagnostic lites 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
