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Page 24
MECHANICAL SYSTEM
The mechanical system of the SCOTSMAN
Flaker machines consists basically of a gear
motor assembly (two on model MF 66) which
drives, through a ratched coupling, a worn shaft
or auger placed on its vertical axis within the
freezing cylinder (two on model MF 66).
The gear motor is made of a single phase electric
motor with a permanent capacitor. This motor is
directly fitted in the gear case through which it
drives - in counter clockwise rotation at a speed
of 9.5 r.p.m. - the freezer auger being linked to it
by the ratched coupling.
NOTE. In the event the gear motor (one of
the two on MF 66) will tend to rotate in the
wrong direction (counterclockwise) or not
rotating at all or rotating at lower speed the
unit will stop immediately (compressor and
gear motor) with the glowing of the WARNING
YELLOW LED on account of the intervention
of the Electromagnetic Safety Device -
based on Hall Effect principle.
After having diagnosed and eliminated the
source of the gear motor wrong rotation, to
FIG. 7
WATER
LEVEL
GEAR MOTOR
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
L
L
N
N
RESET
13
13
ROTATION
12
12
11
11
10
10
9
9
1
1
TRANSF.
2
2
restart the unit it is necessary to press the
RE-SET push button or switch OFF and ON
the power line main disconnnect switch
(Fig. 7).
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, the machine SHUTS OFF
DEFINITIVELY.
The RED LED will start blinking and after 3
minutes the ice maker will resume its total
operations by running first the gear motor
and then the compressor.
Too low ambient and water temperature (well
below the limitations of respectively 10°C and
5°C - 50°F and 40°F) or frequent interruptions of
the water supply to the freezing cylinder (clogging
of the water hose connecting the float reservoir to
the water inlet at the bottom of the freezer) may
cause the ice to get too hard and compact loosing
fluidity and thereby seizing the auger.
This situation will put under excessive strain
and load the entire drive system and freezer
bearings.
8
8
7
7
RELAYS
6
6
5
5
4
4
3
3
TRIAC
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
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