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RE-SET/HI TEMPERATURE. To be selected to
resume the unit operation when the ice maker
shuts off due to the intervention of the condenser
temperature sensor (too high condensing tem-
perature).
The five LEDS, placed in a row in the front of the
P.C. BOARD, monitor the following situations:
GREEN LIGHT
Unit under electrical
power
YELLOW LIGHT
Unit shut-off at full
storage bin
RED LIGHT
Unit shut-off due to hi
condensing temperature
blinking
Unit shut-off due to too
hi evaporating temperature
YELLOW LIGHT
Unit freezing operation
YELLOW LIGHT
Unit cleaning/rinsing
mode (not appearing in
the front panel)
F. DIP SWITCH
The P.C. BOARD which controls the entire
operation of the ice maker, has a DIP SWITCH
with ten switching keys which allow to set up the
micro processor program in order to extend or to
shorten the length of freezing and defrost cycles
in relation Io the different models and versions of
ice machines.
When the light beam is interrupted the RED LED
located in the front of the P.C. BOARD goes off;
in case the light beam is constantly interrupted for
more than 60 seconds, the ice machine stops
with the glowing-up of the 2nd YELLOW LED to
monitor the situation of ice bin full.
The 60 seconds of delay prevent that an ice
scoop movement or the ice dropping through the
ice chute (interrupting for a while the light beam)
can stop the operation of the unit.
As soon as the ice is scooped out (with the
resumption of the light beam between the two
infrared sensor of ice level control) the RED LED
is lighted up and after 6 seconds the ice machine
restarts again with the extinguishing of the 2nd
YELLOW LED.
E. 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 integrated with a program selector, of five
aligned LEDS monitoring the operation of the
machine, of two extra monitoring RED LEDS, of
one DIP SWITCH with ten keys, of input terminals
for the leads of the sensor probes and 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 four sensors in order to
control the operation of the different electrical
components of the ice maker (compressor, water
pump, solenoid valves, etc.).
By tuming the program selector it is possible to
put the unit in the following different situations:
CLEANING/RINSING. The water pump is the
only electrical component in operation and it
must be used during the cleaning or the rinsing
procedure of the water system of ice machine.
STAND BY. The unit remain under electrical
power but OUT of operation. lt can be used by
the service engineer in order to stop the unit
during the service and inspection operations.
IN OPERATION. The unit is running through the
freezing and defrostcycles stopping automatically
only at full bin situation.
(40 paginas)
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