Koolaire KDT0300A Technician's Handbook page 97

Harvest Cycle
REMOTE CONDENSER
The head pressure control cycles into full bypass due to the
pressure drop when the harvest valve opens. Refrigerant
flows from the compressor to the evaporator through the
harvest valve and the head pressure valve is out of the
circuit.
Undercharge Symptoms
• Safety limit #1 or Safety limit #2 in control board
memory, a flashing triangle alert and after pressing left
arrow Long Freeze or Long Harvest is displayed.
• Harvest cycle suction pressure is low.
• Harvest cycle discharge pressure is low.
• Liquid line entering receiver feels warm to hot in the
freeze cycle.
Overcharge Symptoms
• Safety limit #2 in control board memory, a flashing
triangle alert and after pressing left arrow Long
Harvest is displayed.
• Harvest cycle discharge pressure is normal.
• Freeze cycle time, suction and discharge pressure are
normal and the ice machine will not harvest. The sheet
of ice cubes show little or no sign of melting when
removed from the evaporator after the harvest cycle
has been completed. (If the cubes are melted you have
a release problem, clean the ice machine).
Part Number STH063 9/17 97