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control stream or from the water tank during the freeze cycle. The water level in the liquid
level probe tube must get below the level of the low water level probe initiate the harvest
cycle. If there is an excess of water in the water tank, the water pump outlet pressure
increases when the evaporator cells are full, and the control stream rises and flows over
the dam to the drain pan to evacuate the liquid level control tube.
Lower: When the water level in the liquid level probe tube is below the low water level probe the
controller senses the absence of continuity between the probes. Power is applied to the defrost
valve coil allowing hot gas to circulate through the evaporator. The evaporator begins to defrost,
and the water plate begins to open immediately. When the cam arms down switch is activated
the water plate will stop.
Harvest: As long as the evaporator remains cold, the water plate(s) remain in the open position
with the water solenoid valve de-energized. The defrost valve remains energized, and the
evaporator(s) become warm enough to release the ice which drops by gravity into the ice storage
area.
Raise: After the ice is out and the evaporator(s) warm to the reset temperature required by the
controller the actuator motor(s) will be energized to close the water plate(s) The water solenoid
valve will be energized to begin the water fill for the next ice-making cycle, the defrost valve will
be de-energized, and the evaporator will begin to cool.
Ice Bin Full: When the level of ice reaches the bin probe, the ice maker stops automatically, and
it remains off until the bin probe warms up when the ice level is lowered.
Note: in remote condenser models (r), the compressor continues to run after bin control
shutdown until the low-side is pumped down to the setting of the pumpdown controller.
This pressure should be between 5 and 10 psig and must never be vacuum.
Cleaning Mode: All of the cuber's operational components except refrigeration are able to
function with the make ice/clean switch in the clean position. Simply placing this switch in the
cleaning position does not complete the cleaning and sanitizing of the cuber. Instructions
pertaining to the cleaning of a machine can be found on page 11 of this manual.
Note: The frequency of the need for cleaning is determined by the supply water
characteristics. The cuber should be cleaned no less frequently than once each 6 months,
and it may require more frequent cleaning. The requirement for sanitizing frequency may
be contained in local health code regulations.
Water Plate Closure Problems: If the plate up switch is not properly actuated, due to mis-
adjustment, weak springs, or an obstruction to the water plate travel, such as ice which did not
slide off of the plate, the actuator motor will immediately reverse and re-open the water plate.
Shutdown-High Pressure: All models are provided with a high pressure cutoff which interrupts
power only to the compressor, and to the condenser fan motor if so equipped, when the high-side
pressure rises to the cutoff setting. The high pressure cutoff requires manual resetting to restore
power in all models. When this happens in air and remote cooled models be sure there is
sufficient airflow, a clean condenser, and a properly functioning fan motor. In liquid cooled
models make sure the liquid regulator valve is adjusted properly and that there is sufficient flow of
coolant.
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