Cornelius IWC322 Informacje Techniczne Pobierz pdf (Strona 30)

I-Series Ice Machine Training Manual

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6. As the suction line temperature decreases the milli-volt reading should increase.

• If the multimeter reading remains steady and does not increase, it indicates a

shorted sensor. Replace the sensor and check again.

• If the multimeter reading is 2.5 VDC it indicates an open sensor. Replace the

sensor and check again.

4.5 Sensors

The suction line sensor is a thermistor rated at 2815 ohm ± 5%, at 32° F (0° C). This sen-

sor controls the ice bridge thickness by measuring the suction line temperature and send-

ing it to the circuit board. The circuit board controls the compressor.

If the suction line temperature does not drop to 40° F (4.4° C) in 6 minutes, the ice

machine goes into a safety shutdown mode. A manual reset must be performed

4.6

GREEN BOARD

Voltage Selector Switch

• Selector bar in CENTER position- - - switch is OPEN (ice machine is

inoperative)

• Selector bar DOWN - - - - - - - - - 115 VAC selected

• Selector bar UP - - - - - - - - - - - 230 VAC selected

4.7 GREEN BOARD Ice Bridge Thickness Potentiometer (POT)

Factory Reset

1. Turn voltage selector switch OFF (center position).

2. Unplug proximity switches and thermistor(s) from circuit board.

3. Turn voltage selector switch ON.

4. Momentarily short across the bottom two pins of the test plug with a wire jumper

or screw driver.

• If the POT is within the factory setting the D-5 LED will flash continuously.

• If the POT is NOT within the factory setting the D-5 LED will NOT light.

5. If the D-5 LED is not lit, slowly turn the adjuster clockwise until it lights. If the

LED does not light after 10 turns, turn the adjuster counterclockwise until it

lights.

SERVICE

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Cornelius IWC322 Informacje Techniczne Strona 30