Scotsman TCL 180 Service Manual page 14

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E. ICE BIN LEVEL LIGHT CONTROL - BLACK
FOUR POLES CONNECTOR -
AUTOMATIC RESET
The electronic ice bin level control, located into
the ice spout, has the function to stop the operation
of the ice machine when the light beam between
the light source and the sensor gets interrupted
by the flake ice which accumulates in the spout.
When the light beam is interrupted the 1st
YELLOW LED located in the front of the P.C.
BOARD blinks; in case the light beam gets
interrupted for as long as 6 seconds, the ice
machine stops with the glowing-up of the same
YELLOW LED to monitor the full ice bin situation.
The 6 seconds of delay prevents that any minimum
interruption of the light beam due to the regular
ice chuting through the ice spout may stop the
operation of the unit.
As soon as the ice is dispensed out (with the
resumption of the light beam between the two
infrared sensor of ice level control) the YELLOW
LED blinks fast and after 6 seconds the ice
machine resume its operation with the
simultaneous extinguishing the YELLOW LED.
FIG. 10 OPTICAL ICE LEVEL CONTROL OUT OF ORDER
F. ICE/WATER OPTICAL DISPENSING
DEVICE - BLUE FOUR POLES CONNECTOR
Located on the front of the dispensing area it
consists of the combination of an infrared
Transmitter and Receiver.
When a glass or a carafe is placed in front of the
Infrared sources, the optical device transmits a
signal to the PC Board that is equivalent to
activate the dispensing drive motor which, in
turn, put in rotation a dispensing vane that pushes
the ice towards a rectangular opening located in
the bottom of the storage bin.
Elapsed the dispensing time (5, 10 or 15 seconds
according to the setting) or after have removed
the glass/carafe, the infrared resume its original
condition switching off the dispensing drive motor.
G. FRONT DISPENSING SELECTOR/
DISPLAY - BLACK SIX POLES CONNECTOR
Placed in the upper front part of the dispensing
area it is used to select, according to the version
of the machine:
a) Ice (first switch)
or
a) Ice (first switch)
BLINKING - FLASHING ALTERNATE
b) Ice and water (second switch)
c) Water - not chilled - (third switch)
It is also possible to set up for "continuous"
dispensing operation just pushing the fourth
switch before or after the selection of the
dispensed product.
Once completed the dispensing selector/display
resumes its original dispensing setting mode.
NOTE. It is possible to modify the original
resume mode (default) by pushing for 5
seconds the corresponding switch (all
machines are supplied from the factory in the
ICE dispensing mode).
It is also possible to modify the dispensing
time controlled by the PC Board to 1.5, 3, 5
and 10 seconds by:
a) Push and olt the 4
for approximately 10 seconds till the first 3
lights start to blink
st
b) Pushing the 1 switch (ICE) is equivalent
to 5 seconds
Pushing the 2 nd switch (ICE+WATER) is
equivalent to 10 seconds
Pushing the 3 rd switch (WATER) is equiva-
lent to 1.5 seconds.
th
Pushing the 4 switch (CONTINUOUS) is
equivalent to 3 seconds.
H. P.C. BOARD (Data processor)
The P.C. BOARD, fitted in its plastic box located
in the right side of the unit, consists of two separated
printed circuits one at high and the other at low
voltage, protected by three fuses, integrated with
a RE-SET button. Also it consists of six aligned
LEDS monitoring the operation of the machine
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.) as well as the dispensing of the ice
and water.
The six LEDS, placed in a row in the front of the
P.C. BOARD, monitor from right to left the
following situations:
RED LED
ON all the time
- Unit shut-off due to a too hi-condensing
°
temperature > 70 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
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th switch "continuous"