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CONDENSER TEMPERATURE SENSOR
The condenser temperature sensor probe, located on
the frame of the unit, is used (on MF 58/68) to detect
the ambient temperature.
When it is below +1°C (33°F) the signal transmitted
to the PC Board is equivalent to keep the unit OFF till
the ambient temperature rise up to +5°C.
GEAR MOTOR ROTATION AND SPEED SENSOR
(Two on MF 68 Model)
This safety device is housed on top of the Drive
Motor (one per each motor on MF 68 model) and
detects - based on Hall Effect principle - the rotating
speed and rotating direction of the drive Motor.
Should the rotating speed drop below 1300 r.p.m. the
magnitude measured by this device is such to signal
to the microprocessor to stop the unit and light-up the
YELLOW LED. About the same reaction occures
when the drive motor will tend to rotate in the wrong
direction (counterclockwise) situation that, if it
occures, will greatly affect all the freezer and gear
reducer components.
NOTE. To restart the unit after the shutoff caused by
this safety device, it is necessary first to eliminate the
cause that has generated the intervention of the
device and switch OFF and ON the power line main
disconnect switch.
SPARE PARTS
All the service parts used on gear reducer as well as
in the freezer assy are exactly the same of the
standard model MF 51/61.
Liquid solenoid valve body
Liquid solenoid valve coil
Thermostatic expansion valve body
Thermostatic expansion valve nozzle
Refrigerant evaporating pressure regulating valve
Contactor
ICE BIN LEVEL LIGHT CONTROL (Two on MF 68
Model)
The electronic ice bin level control, located into the
ice chute (one in each of the two ice chutes on MF 68
model), 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 chute.
When the light beam is interrupted the 2
LED located in the front of the P.C. BOARD starts to
blink. In case the light beam gets interrupted for as
longer as 10 seconds, the ice machine stops with the
glowing-up of the 2nd YELLOW LED (steady) to
monitor the full ice bin situation.
The 10 seconds of delay prevents that any minimum
interruption of the light beam due to the regular ice
chuting through the ice chute may stop the operation
of the unit.
After 10 seconds of the ice scooped out (with the
resumption of the light beam between the two
infrared sensor of ice level control) the ice machine
resume
its
operation
extinguishing the 2nd YELLOW LED.
The only spare parts typical of the new MF 58/68
Split versions are listed in the following chart.
MF 58
680306 07
680306 48
680427 00
680427 08
680454 01
630119 02
9
ND
YELLOW
with
the
simultaneous
MF 68
680306 07
680306 48
680427 00
680427 08
680454 00
630119 02
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