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Bartscher F80 Manuel De Service page 62

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A Evaporator temperature sensor
The evaporator sensor probe is inserted into its
tube well, which is welded on the evaporator
outlet line, it detects the temperature of the ref-
rigerant on the way out from the evaporator and
signals it by suppling a low voltage current flow
to the P.C. Board.
According to the current received, the micro-
processor let the ice maker to continue its ope-
rations or not. In case the evaporating tempera-
ture, after 10 minutes from the unit start-up,
does not go below -1°C (30°F) the evaporator
ration, with the blinking of the 5th Warning
sensor signals to stop immediately the unit ope-
YELLOW LED.
NOTE. Themachinewill remaininOFFmode
for one hour then it will restart automatically.
In case the unit trips OFF again in alarm for
3 times in 3 hours, themachine SHUTSOFF
DEFINITIVELY.
To restart the unit after the shutoff caused by
the hi evaporating temperature, it is necessary
to switch OFF and ON the power line
main disconnect Switch.
B Water level sensor
This sensor consists of two small stainless steel
rods vertically fitted on the inner face of the
reservoir cover and electrically connected to
the low voltage circuit of the P.C. Board.
When the cover of the reservoir is positioned in
its place the tips of both the rods dip into the
reservoir water transmitting a low power current
throu the same.
20
COMPONENTS DESCRIPTION
NOTE. In the event of shortage of water in the
reservoir or, in case the water used is too soft (de-
mineralized) to cause greater resistence to the
μS) this sensor system causes the shutoff of the
current flow (electrical conductivity lower than 30
machine, to protect it from running without water
tion the YELLOW LED will glow to warn of the
or with an inadequate water quality. In this situa-
machine shutoff and the reason why.
C Condenser temperature sensor
The condenser temperature sensor probe, located
within the condenser fins (air cooled version) or in
contact with the tube coil (water cooled version)
detects the condenser temperature variations and
signals them by supplying current, at low voltage,
to the P.C. BOARD.
In case thecondenser temperaturesensordetects
a temperature at the condenser lower than +3°C
(37°F) that means ambient temperature too low for
the correct unit operation, the sensor signals to the
P.C. BOARD to do not start up the unit till the
ambient temperature rises to 10°C.
In the air cooled versions, in relation to the diffe-
rent current transmitted, the micro processor of the
P.C. BOARD supplies, through a TRIAC, the power
at high voltage to the fan motor.
In the event the condenser temperature rises and
reaches 60°C or 70°C according to the setting of
DIP SWITCH number 8 the current arriving to the-
micro processor is such to cause an immediate
and total stop of the machine operation.
NOTE. The machine will remain in OFF mode
for one hour then it will restart automatically.
In case the unit trips OFF again in alarm for 3
times in 3 hours, themachine SHUTSOFF DEFI-
NITIVELY.
To restart the unit after the shutoff caused by
the hi condenser temperature, it is necessary to
switch OFF and ON the power line main
disconnect Switch.

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