Manitowoc Indigo Series Technician's Handbook page 184

NO Is harvest valve energized?
Refer to Sequence of
Operation &
Wiring Diagrams
Refer to Symptom #4 -
Will Not Harvest, Freeze
Cycle Normal & Ice Cubes are
Single Evaporator Systems with Dual Harvest Valves: If one Harvest Vavle is open and the other is restricted / stuck closed you may have
normal harvest pressures. Look for ice not melting on one side of the evaporator.
YES
YES
YES
Melted Flowchart
Is head pressure high &
suction pressure low
in harvest?
NO
Is head pressure low &
suction pressure low
in harvest?
NO
Is head pressure normal &
suction pressure normal
in harvest?
YES
Replace Harvest Valve
YES
Refer to Harvest Pressure
Regulating Valve
Diagnostics
Repeat this flowchart &
NO
verify all data