Service Manual

Part Number: 000015430 Rev 02 5/20 125
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Condenser Models
The column with the highest number of check marks
identifies the refrigeration problem.
COLUMN 1 - HARVEST VALVE LEAKING
Replace the valve as required.
COLUMN 2 - LOW CHARGE/TXV STARVING
Normally, a starving expansion valve only affects the freeze
cycle pressures, not the harvest cycle pressures. A low
refrigerant charge normally affects both pressures. Verify
the ice machine is not low on charge before replacing an
expansion valve.
1. Add refrigerant charge to verify a low charge (air and
water self-contained only). Do not add more than
30% of nameplate refrigerant charge. If the problem is
corrected, the ice machine is low on charge.
NOTE: Do not add charge to remote models. The
symptoms of a remote low on charge will result in a safety
long freeze in cool ambient temperatures. Check the liquid
line temperature at the ice machine. The liquid line will be
hot with a normal or below normal head pressure in freeze
when the ice machine is low on refrigerant.
2. Find the refrigerant leak. The ice machine must
operate with the nameplate charge. If the leak cannot
be found, proper refrigerant procedures must still be
followed. Change the liquid line drier. Then, evacuate
and weigh in the proper charge.
3. If the problem is not corrected by adding charge, the
expansion valve is faulty.