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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.
Reference to other portions of this manual,
including wiring diagrams, installation, and
operation are recommended to better
determine the cause of a problem.
SYMPTOM POSSIBLE CAUSE CORRECTION
Warning Red LED ON See page 19-20 See page 19-20
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. None.
Machine runs, compressor
does not.
P.C. Board compressor
relay open.
Test and replace.
Compressor contactor
open.
Test and replace.
Compressor relay open. Test and replace.
Compressor winding open. Test and replace.
Machine runs, makes ice,
does not try to harvest.
Ice thickness control open. Check sensor fingers if are not
covered with scale sediment.
Too soft water. Water electrical conductivity must be
higher then 20 μs. Machine can't
run with demineralized water.
Built-in relay on
Check and replace P.C. Board.
P.C. Board open.
Machine runs, makes and
harvests ice but very slowly.
Low refrigerant charge. Check system for correct refrigerant.
charge. Check for leak weight in
charge.
Low ice capacity. High discharge pressure
due to not-condensable or
overcharge.
Evacuate and weigh in charge.
Inefficient compressor. Replace.
Condenser dirty. Clean.
Low water flow
(Water-cooled).
Check and repair.
High air temperature
(air-cooled).
Check temperature of air entering
condenser.
Machine makes irregular ice. Plugged water distributor. Clean water distributor.
TXV superheat wrong. Adjust or replace.
Refrigerant charge low.
Adjust-check for leak.
Recharge.
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