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CME1856W
Service Diagnosis
Problem or Symptom Possible Cause
Unit is off because of a
"Harvest Problem"
Cubes are too large
Cubes are too small
Low ice capacity
Unit does not shut off
Ice sensors did not sense
ice falling, unit stayed in
harvest until the maximum
harvest time ran out.
Ice sensors or Controller
may have failed.
Other components may
have failed
Water sensor float is
sticking.
Inlet water valve leaking
thru (slowly)
Not enough water
Water regulating valve
pressure adjusted too high
Low refrigerant charge
Too much water
Ice sensing system may
have failed.
November 2001
Page 30
Probable Correction
Check ice sensors. If the bin full light is on or
blinking the ice sensors may be dirty. Clean if
dirty. The board and ice sensors may also
need to be checked for proper operation.
Check evaporators for lime scale build up.
Clean evaporators and bin controls if dirty.
Push and release Off button. Push and
release Freeze button. Check machine
operation. Check if ice is made and harvests.
See "Unit does not shut off" below..
Check the next page
Check/clean
Check hose from water valve for slow drip.
Replace valve if dripping.
Check for leak in reservoir
Check/clean water sensor eyes
Check for a leak thru the purge valve
Adjust water regulating valve to 240 PSIG of
discharge pressure in freeze
Check system. If there is a low charge, find
the leak, recover the refrigerant, repair the
leak, replace the dryer, evacuate and weigh in
the nameplate charge.
Check for inlet water valve leak thru
Check controls. Unplug thermostat and check
bin full light, if off, place something between
the electric eyes. The bin full light should
begin glow steadily after 20 seconds of
continuous blockage. If not, check operation
of electric eyes by unplugging #4 and jumping
out the two pins on the controller (touch the
tool to the cabinet to discharge static
electricity before contacting the controller). If
the bin full light blinks, replace the bin
controls. If it does not blink, replace the
controller. Note: Leaving #4 unplugged and
jumped for 20 seconds will shut the machine
down on a bin full (at the end of the harvest
cycle). It will restart after 4 minutes or may be
reset by pushing the Freeze button.
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