Service Diagnosis - Scotsman CME1356R User Manual

CME1356R and CME1656R

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
Bin controls did not sense
ice falling, unit stayed in
harvest until the maximum
harvest time ran out.
Bin controls or AutoIQ
Controller may have failed.
Other components may
have failed
Cube size control float is
sticking.
Inlet water valve leaking
thru (slowly)
Not enough water
Dirty condenser
Recirculation of air
Low refrigerant charge
Too much water
Ice sensing system may
have failed.
May 2001
Page 32
Probable Correction
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.
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 for a leak thru the purge valve
Clean condenser
Block air re-circulation or move condenser
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 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.