Icematic N 132M, Service Manual, Page: 13 / 30

GB
13
START-UP
START-UP CYCLE
1. Open the water tap/valve and switch ON the power
on the electrical supply line.
2. The models N 202-302-402-502 enter in the Start
Up mode with the PC Board energized as well as
the
Green LED
of the machine under power while
the models N 402-502 enter in 90 minutes delay
time controlled by a special Start-up Delay PC
Board.
The
Green LED
of machine in operation is ener-
gized too,
blinking fast for 40 seconds.
3. During the Start Up cycle the components in oper-
ation are:
• Hot gas valve
• Water Drain Valve
• Water Pump
• Harvest assist solenoid (pusher).
FREEZING CYCLE
1. After the Start Up cycle the machine enters direct-
ly into the Freezing cycle with the following com-
ponents energized:
• Water Inlet valve
• Compressor
• Fan motor (in continuous operation for the first 3
minutes).
2. The LED energized are:
• Machine under power
• Machine in operation (steady)
3. Water is coming into the water through the Water
Inlet Solenoid Valve till the water reservoir if filled
up to the maximum level controlled by a Water
Level Sensor.
4. 30 seconds later, the Water Pump starts up.
5. After few minutes (3-5) from the start up of the
freezing cycle, the Water Inlet Solenoid Valve is
activated again for few seconds to re-fill the water
reservoir up to the maximum level so to reduce
any possibility of slush ice formation.
6. In the meantime the condenser sensor starts to
transmit the current to the PC Board keeping in
operation the Fan Motor in ON-OFF mode or con-
tinuously according to the condenser temperature.
7. The machine remains in the freezing cycle with the
ice that become thicker till the two metal plates of
the Ice Thickness Sensor are covered by the water
cascading through the front surface of the ice
plate.
8. When the Power is transmitted back to the PC
Board continuously through the metal plates of the
Ice Thickness Sensor for more then 6", the
machine enters in the Pre-Harvest or directly into
the Harvest Cycle mode according to:
• FAN MOTOR IN ON-OFF MODE DURING THE
PREVIOUS FREEZING CYCLE
RISE UP THE CUT IN TEMPERATURE OF THE
CONDENSER SENSOR TO 38°C (FAN MOTOR
OFF) AND EXTEND THE LENGTH OF FREEZ-
ING CYCLE BY 30" MORE THEN GO INTO HAR-
VEST CYCLE
• FAN MOTOR ALWAYS IN OPERATION DURING
THE PREVIOUS FREEZING CYCLE
GO STRAIGHT TO THE HARVEST CYCLE
9. First freezing time will range between 13 and 17
minutes.
Longer time for temperature above 25°C and
shorter time required when temperature are below
25°C.
Average complete cycle time is about 15 min.
NOTE:
Do not remove the evaporator deflector
cover as it will cause the switching off of the
machine at "STORAGE BIN FULL".
NOTE:
The models N 502 is equipped with a com-
pressor crankcase heater and a Start up Delay PC
Board set up at 90 minutes. During the first 90
minutes only the compressor crankcase heater is
energized warning up the compressor.