Page 27
Page 27
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 can
exclusive list.
Reference to other portions of this manual,
inclusing wiring diagrams, installation, and
operation are recommended to better determine
the cause of a problem.
SYMPTOM
POSSIBLE CAUSE
CORRECTION
Machine does not run.
Defrost or harvest cycle too long
Check for hot gas valve failure, for
Warning Red LED ON
(more then 3')
malfunction of water pump, for
shortage of water, for malfaction of
magnetic switch, for proper
operation of compressor contactor
and for compressor operation.
Warning Red LED BLINKS
Too high condensing temperature
Check for correct operation of fan
motor/s and condenser sensor.
Warning Red LIGHT ON
Too high condensing pressure
Check for correct operation of
fan motor/s.
No warning LED/LIGHT ON
P.C. Board inoperative.
Remove board and check.
No power to unit.
Check electrical source.
Bin full Yellow LED ON
Bin Full of ice.
Nome.
Magnetic switch inoperative.
Check and replace.
Machine runs, compressor
P.C. Board compressor
Test and replace.
does not.
relay open.
Compressor contactor open.
Test and replace.
Compressor relay open.
Test and replace.
Compressor winding open.
Test and replace.
Machine runs, makes ice,
Ice thickness control open.
Check sensor fingers
does not try to harvest.
if are not covered
with scale sediment.
Too soft water.
Water electrical conductivity
must be higher then 20
µ
S.
Machine can't run with
demineralized water.
Built-in relay on
Check and replace P.C. Board.
PE.C. Board open.
Machine runs, makes
Low refrigerant charge.
Check system for correct refr. charge.
and harvests ice.
Check for leak weight in charge.
but very slowly.
