Cornelius I Series Wartungshandbuch PDF herunterladen (Seite 36)

33 TD 204

“I” SERIES

SEQUENCE OF OPERATION

When the on off clean switch is pushed to the on position the com-

pressor will start after a 2 second delay. The fan motor and pump are

delayed. The condenser fan motor on integral air cooled unites will

start when the condenser temperature rises to approximately 38° C.

The water pump will start when the suction line temperature reaches

approximately –4°C. Temperature information is transmitted to the

control board thru thermistor sensors. The unit is now in the freeze

cycle. If after approximately 6 minutes of operation the suction line

temperature is not below 4.4°C, the unit will shut down and show an

error light on the control board. When the harvesting set point tem-

perature is reached, the circuit board will switch to the harvest cycle.

At the start of the harvest cycle the condenser fan motor will shut off

and the Dump Valve and Hot Gas Valve will open. The Water Pump

will shut down in approximately 15 seconds. Harvest will continue

for approximately 90 seconds. when the Ice is harvested the evapo-

rator curtain opens and closes breaking a magnetic field of the evap-

orator proximity switch which signals the circuit board to switch

back to the Freeze Cycle.

When the Evaporator Curtain is held open, in the freeze cycle,

breaking the Evaporator Switch Magnetic Field for 5 to 8 seconds,

the circuit board is signaled that a full bin condition has been

reached , and shuts down the unit.

COMPONENT FUNCTIONS

Circuit Board

The circuit board controls the operation of the Ice Maker through in-

formation it receives from Thermistor Sensors and Proximity (mag-

netic) Switches.

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Cornelius I Series Wartungshandbuch Seite 36