Scotsman CME1356 - Manual (Page 30)

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. The bin full light should be
off. If it is on or blinking the bin controls may be
dirty. Clean if dirty. The board and bin controls
may also need to be checked.
Push and release Off button. Push and release
Freeze button. Check machine operation.
Check if ice is made and harvests.
Bin controls or AutoIQ
Controller may have failed. See “Unit does not shut off” below.
Other components may
have failed Check the next page
Cubes are too large Cube size control float is
sticking. Check/clean
Inlet water valve leaks thru Check water valve
Cubes are too small Purge valve leaks thru Check purge valve
Not enough water Check for leak in reservoir
Low ice capacity Dirty condenser or filter Replace filters, 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
or cannot sense ice
falling Ice sensor system may
have failed. Check ice sensors. 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 (first discharge any static
electricity by touching the cabinet with the tool).
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.
CME1356 and CME1656
May 2000
Page 30