Symptom #3 Ice Will Not Harvest, Cubes Are Not Melted - Manitowoc S300 Technician's Handbook

SYMPTOM #3 ICE WILL NOT HARVEST, CUBES ARE NOT MELTED

Ice Machine Will Not Harvest - Freeze Cycle is Normal and Ice Cubes are Not Melted After Harvest
Low production,
Normal fill pattern, long
harvest cycle, Possible SL #2,
Back of cubes are not melted
NO
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Discharge line temperature is normal
at the end of the freeze cycle?
YES
S850/S1000 (A/W) = >140F/60C
All other S Models = >150F/65C
Is harvest valve energized?
Is head pressure high &
suction pressure low
(Refer to Pressure Charts)
YES
YES
in harvest?
Refer to
Symptom #2
NO
Freeze Cycle
Operational
Analysis Table
Refer to Sequence of
Operation &
NO
Wiring Diagrams
Replace
YES
harvest
valve