Start Up Sequence (Primary); Secondary Start Up; Dump Cycle; Water Fill Cycle - Cornelius XAC 1444 Service Training Manual

START UP SEQUENCE (PRIMARY)

1. Check all connections.
2. Water pan must be empty at the start of the initial fill cycle.
3. Turn on the main power switch, the red LED will flash 6 times then remains on for 4 seconds.
NOTE: If there is a very large slab of ice on the evaporator you will need to push the manual har-
vest button to remove it.

SECONDARY START UP

1. Compressor starts after ERROR LED extinguishes, and the green COMP LED turns on.
2. Compressor runs continuously after secondary start up sequence.
3. Hot gas valve opens for a 45 second period.
4. Green GAS LED is on when the hot gas valve opens.
5. After 45 seconds, the hot gas valve de–energizes.
NOTE: If there is a very large slab of ice on the evaporator you will need to push the manual har-
vest button to remove it.
6. Compressor starts then the unit will go through a 45 second hot gas defrost to remove any ice
that might be on the evaporator.
7. The water inlet solenoid makes its initial fill.
8. There will be approximately a (45) second evaporator pre chill, then the water pump will start,
and the freeze cycle begins.

DUMP CYCLE

1. The dump cycle can be changed by moving the setting on the dump cycle dip switches.
2. If both switches are off, the machine dumps water after each cycle. This is the factory set point.
3. If switch 1 is on and switch 2 is off, the machine dumps after every third harvest.
4. If switch 1 is off and switch 2 is on, the machine dumps after every seventh harvest.

WATER FILL CYCLE

1. The fill valve opens.
2. The green FILL LED is on when the fill valve energizes.
3. Once the water level reaches the maximum level the fill valve de–energizes.
NOTE: During the initial filling of the water pan, air is captured inside the pressure sensor pick
up. When the pressure inside the pressure sensor pick up rises to a predetermined value, the
pressure transducer shuts off the water fill valve and starts the prechill cycle then the freeze
cycle.

PRECHILL CYCLE (300'S, 500'S, 600'S, 800'S, 1000'S, AND 1200'S)

1. The water pump turns on 45 seconds into the cycle.
2. After another 45 seconds, the fill valve turns on and tops off the water level.
3. Once the water level reaches the maximum level the fill valve de–energizes.
4. During normal operation, as the water pan fills the D.C. voltage will range from .25 to 3.5 VDC at
center and left pins, on the J9 connector (See Figure 8).
TP00952 14
Xtreme Ice Training Manual
October 17, 2005