Cornelius I-SERIES Training Manual page 30

I-Series Ice Machine Training Manual
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
G B
4.6
REEN
• Selector bar in CENTER position - - - switch is OPEN (ice machine is
inoperative)
• Selector bar DOWN - - - - - - - - - 115 VAC selected
• Selector bar UP - - - - - - - - - - - 230 VAC selected
G B
4.7
REEN OARD
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.
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Voltage Selector Switch
OARD
Ice Bridge Thickness Potentiometer (POT)
© 2001, IMI Cornelius Inc.