Bartscher F 80C, Service Manual

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D Electromagnetic sensor
This safety device is housed on top of the Drive
Motor and detects - based on Hall Effect princi-
ple - the rotating speed and rotating direction of
the drive Motor.
Should the rotating speed drop below1300
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. The
same reaction occures when the drive motor
will tend to rotate inthewrongdirection(counter-
clockwise) or when it doesn't rotate at all.
E Optical ice level control
The electronic optical ice level control, located
into the ice chute has the function to stop the
operation of the ice machine when the light
beam between the light source and the receiver
gets interrupted by the flake ice which accumu-
lates in the chute.
When the light beam is interrupted the Bin Full
YELLOW LED located in the front of the P.C.
BOARD blinks; in case the light beam gets inter-
rupted for as longer as 6 seconds, the ice
machine stops with the glowing-up of the 2nd
YELLOWLEDto monitor thefull ice binsituation.
The 6 seconds of delay prevents that any mini-
mum interruption of the light beam due to the
regular ice chuting through the ice chute may
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 - YELLOW
LED blinks fast) 6 seconds later the ice machi-
ne resumes its operation with the simultaneous
extinguishing the 2nd YELLOW LED.
NOTE.
The machine will remain in OFF mode
for one hour then itwill restart automatically. In
case the unit trips OFF again in alarm for 3
times in 3 hours, the machine SHUTS OFF
DEFINITIVELY. To restart the unit after the shu-
toff caused by this safety device, it is neces-
sary first to eliminate the cause that has gene-
rated the intervention of the device and then
switch OFF and ON the power line main
disconnect switch.
Characteristics of the optical sensor
for flakes
Infra-red receiver (Photo transistor)
Maximum voltage Vce 35V
Maximum electricity Ic 50 mA
Collector electricity whereby
Ev=1000 1x, Vce=5V between 1 and 2 mA
Operation temperature -55°C ÷ +100°C
Infra-red transmitter (Photo dioxde)
Max. conversion voltage Vr 5V
Maximum electricity If 100 mA
Direct voltage Vr@100mA 25°C = 1.5V
Operation temperature -55°C ÷ +100°C
Resistive values
Evaporatore probe
KTY 10.62
T°C Rmin Rmax
-30 1223 1276
-20 1345 1394
-10 1474 1517
0 1611 1650
10 1757 1788
20 1910 1933
25 1990 2010
30 2067 2092
40 2226 2263
50 2395 2442
60 2569 2629
70 2752 2824
80 2941 3027
Resistive values
Condenser probe
KTY 11.7
T°C Rmin Rmax
-30 1236 1301
-20 1358 1422
-10 1489 1547
0 1628 1683
10 1774 1824
20 1929 1972
25 2010 2050
30 2088 2134
40 2249 2308
50 2420 2490
60 2594 2681
70 2779 2880
80 2970 3087