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infrared sensor of ice level control - YELLOW LED
blinks fast) 6 seconds later the ice machine resumes
its operation with the simul-taneous extinguishing
the 2nd YELLOW LED.
F.
P.C. BOARD (Data processor)
The P.C. BOARD, fitted in its plastic box located
in the front of the unit, consists of two separated
printed circuits one at high and the other at low
voltage and protected by fuses. Also it consists of
five aligned LEDS monitoring the operation of the
machine of three jumpers (TEST used only in the
factory, 60/70°C used to set up the PC Board at
proper safety cut out condensing temperature and
3' to by pass the 3 minutes Stand By) and of input
terminals for the leads of the sensor probes as
well as input and output terminals for the leads of
the ice maker electrical wires.
The P.C. BOARD is the brain of the system and
it elaborates, through its micro processor, the
signals received from the sensors in order to
control the operation of the different electrical
components of the ice maker (compressor, gear
motor, etc.).
The five LEDS, placed in a row in the front of the
P.C. BOARD, monitor the following situations:
GREEN LED
Unit under electrical
power
YELLOW LED
- Blinking: I/R beam cut
out
- Steady: unit shut-off at storage
bin full
- Blinking fast: I/R beam resumed
' 3
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YELLOW LED
Unit shut-off due to a
too lo-water level into
float tank
RED LED
ON all the time
- Unit shut-off due to a
too hi-condensing
temperature
- Unit shut-off due to a
too lo-ambient temperature
°
<+1
C
Blinking
3 minutes start up delay time
YELLOW LED
ON all the time
- Unit shut-off due to the
wrong rotation direction
of gear motor
- Unit shut-off due to the
too lo speed of gear motor
Blinking
- Unit shut-off due to a
too hi-evaporating temp.
°
>-1
C after 10 min of operation
YELLOW AND
RED LED
- Blinking: Evaporator sensor
out of order
- Steady: Condenser sensor
out of order
R
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Page 27
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