Icematic F 125C, Service Manual

Page: 19 / 48

17
E Check for the correct CUT-OUT and CUT-IN
of the water level sensor by first shutting
closed the water shutoff valve on the water
supply line. This will cause a gradual decrea-
se of the water level in the float reservoir and
as soon as the level gets below the two verti-
cal metal pins, the flaker stops to operate
(compressor first and 3' later the gear redu-
cer) and the YELLOW warning LED will
glow to signal the shortage of water (Fig. 4)
Opening the water supply line shutoff valve to
fill up again the float reservoir, the YELLOW
LED goes off while the RED LED starts
blinking. After 3 minutes the unit resumes its
total operation with the immediate start-up of
the gear motor and, few seconds later, of the
compressor.
F Check for the correct operation of the electro-
nic eye (one per each ice chute on model
SF1000N) of the optical ice level control, by
closing the bottom opening of the vertical ice
chute. Wait the built up of the ice into the ice
chute till it cuts the light beam of the sensing
"eyes". This interruption will cause an imme-
diate blinking of the Bin Full YELLOW LED
located on the front of the P.C. Board and
after about 6 seconds causes the shutoff of
the unit (compressor first and 3' later the gear
reducer) with the simultaneous lighting
(steady) of the Same LED signalling the full
bin situation (Fig.5).
Discharge the ice from the ice chute so to
resume the light beam previously interrupted
(YELLOW LED blinking fast) and after about
6 seconds the flaker will re-start - through the
3 minutes STANDBY period - with the extin-
guishing of the YELLOW LED.
NOTE. The water level sensor detects the
presence of water in the float reservoir and
confirms it to the micro processor by maintai-
ning a low voltage current flow between the
two metal pins using the water as conductor.
WARNING. The use of de-mineralized
water (water with no salt content) having
an electrical conductivity lower than 30
mS, will cause break with the consequent
CUT-OUT of the flaker and the glowing of
the YELLOW LED of water shortage, even
with water in the reservoir.