Service Diagnosis
Problem or Symptom
Possible Cause
Probable Correction
Unit is off because of
a “Harvest Problem”
Bin controls did not sense
ice falling, unit stayed in
harvest until the maximum
harvest time ran out.
Check bin controls. If the bin full light is on or
blinking the bin controls may be dirty. Clean if
dirty. The board and bin controls may also
need to be checked.
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.
Bin controls or System
Controller may have failed.
See “Unit does not shut off” below..
Other components may
have failed
Check the next page
Cubes are too large
Water sensor float is
sticking.
Check/clean
Inlet water valve leaking
thru (slowly)
Check hose from water valve for slow drip.
Replace valve if dripping.
Cubes are too small
Not enough water
Check for leak in reservoir
Check/clean water sensor eyes
Check for a leak thru the purge valve
Low ice capacity
Dirty condenser
Clean condenser
Recirculation of air
Block air re-circulation or move condenser
Low refrigerant charge
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.
Too much water
Check for inlet water valve leak thru
Unit does not shut off
Ice sensing system may
have failed.
Check controls. Unplug thermostat and check
bin full light, if off, place something between
the electric eyes. The bin full light should
begin to blink (after 20 seconds of continuous
blockage it will glow steadily). 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.
CME2006R
July 1998
Page 32
