Service Diagnosis - Scotsman SV 225 Service Manual

Page 33

SERVICE DIAGNOSIS

The table below is intended as a quick reference
to aid the Service Agent in determining the cause
of a particular type of malfunction, as well as the
recommended repair. It is not intended to be an
exclusive list.
SYMPTOM
Warning Red LED ON
No warning LED/LIGHT ON
Bin full Yellow LED ON
Machine runs, compressor
does not.
Machine runs, makes ice,
does not try to harvest.
Machine runs, makes
and harvests ice
but very slowly.
Low ice capacity.
Machine makes irregular ice.
Reference to other portions of this manual,
inclusing wiring diagrams, installation, and
operation are recommended to better determine
the cause of a problem.
POSSIBLE CAUSE
See page 20
P.C. Board inoperative.
No power to unit.
Bin Full of ice.
Magnetic switch inoperative.
P.C. Board compressor
relay open.
Compressor contactor open.
Compressor relay open.
Compressor winding open.
Ice thickness control open.
Too soft water.
Built-in relay on
P.C. Board open.
Low refrigerant charge.
High discharge pressure
due to not-condensable
or overcharge.
Inefficient compressor.
Condenser dirty.
Low water flow
(Water-cooled).
High air temperature
(air-cooled).
Plugged water distributor.
TXV supertheat wrong.
Refrigerant charge low.
CORRECTION
See page 20
Remove board and check.
Check electrical source.
Nome.
Check and replace.
Test and replace.
Test and replace.
Test and replace.
Test and replace.
Check sensor fingers
if are not covered
with scale sediment.
Water electrical conductivity
must be higher then 20 µS.
Machine can't run with
demineralized water.
Check and replace P.C. Board.
Check system for correct refr. charge.
Check for leak weight in charge.
Evacuate and weigh
in charge.
Replace.
Clean.
Check and repair.
Check temperature of air
entering condenser.
Clean water distributor.
Adjust or replace.
Adjust-check for leak.
recharge.
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