Circuit Description; Controller Box; Operation - Omcan IC-CN-0040 Manuel D'instructions

There are 3 systems: the Cooling System, the Water System and the Electrical System.
During the ice-making stage, the hot gas valve is closed. The hot refrigerant gas is pumped out of the
compressor to the condenser. The hot gas is cooled by a fan after passing through the condenser. The drier
and filter will reduce possible dirt and moisture in the refrigerant. The refrigerant expands in the evaporator
cooling so water will freeze. The low pressure refrigerant gas returns to the compressor from the evaporator
where the cycle continues. During the ice harvest stage, the valve is open. The hot refrigerant gas is pumped
out of the compressor to the evaporator through the hot gas valve. Since the hot gas i not cooled by the
condenser, the refrigerant warms the evaporator. Ice in contact with the evaporator begins to melt on the back
side. The ice gradually ice slides off of the evaporator and drops to the storage bin. When the water inlet is
connected with the main water supply, water will fill the trough through the float valve until the water level
in the trough closes the valve. During the ice-making stage, water is pumped from the water trough to the
water distribution tube. The distributed water flows over the surface of the cold evaporator where the water is
converted to ice. The unfrozen water will return to the trough. At the end of the freeze cycle and during harvest,
the water dump valve is opened and the remaining water is pumped down the drain.

CIRCUIT DESCRIPTION

1. First time usage: The ice-maker must be properly installed. Switch the water tap on, let the water trough
fill, then turn the power switch to the ON position on the back panel. The ice-maker will start working
automatically. In this stage, the time is fixed about 3 minutes. At this status, the White, Green, Yellow and
Red LEDs are light together.
2. Ice-making Status: The compressor, motor fan and pump are on. The hot gas valve is off. When the green
LED is lit, the unit is working in the ice making mode controlled by a temperature probe on the evaporator.
When the green LED is flashing, the unit is working in the ice making mode controlled by a fixed timer. The
fan motor is also controlled by the condenser sensor. When the ambient temperature is too low, the motor
fan stops working.
3. Ice Harvest Status: The pump is off. The hot gas valve, compressor and motor fan are on. The fan motor
is also controlled by the condenser sensor. When the ambient temperature is too low, the motor fan stops
working. The Yellow LED indicates the ice harvest status.
4. Ice Full Status And Cold Preservation Stage: If the ice bin is filled with ice, the machine stops making
ice and turns to the cold preservation stage automatically. In this stage, the compressor works regularly
to keep the low temperatures so ice does not melt. The rest of the electric components are off. The
WHITE LED indicates the ice full status and the GREEN AND YELLOW LEDs together indicates the cold
preservation status.
5. Cleaning Status: Turn the machine's CLEAN SWITCH to CLEAN for 3 minutes after the POWER SWITCH
is turned on. At this stage, the pump is on. Compressor, motor fan and are off. The GREEN and YELLOW
LEDs are flashing together. To stop the cleaning mode, turn the machine "OFF" or the unit will turn off
automatically after 30 minutes. NOTE: In order to start the Clean Status the unit must be on. The CLEAN
switch must be turned on within 3 minutes before the COMPRESSOR starts. Do not turn the CLEAN switch
on when machine is in ice-making status or ice-harvest status.

CONTROLLER BOX

Instructions for LEDs and buttons:
7

Operation