Service manual

Page 9
Page 9
After this, open the water supply line shutoff
valve to fill up again the float reservoir, the 5th
YELLOW LED goes off while the 2nd RED LED
starts blinking.
After 3 minutes the unit resumes its total operation
with the immediate start-up of the gear motor
and, 2 seconds later, of the compressor.
F. Check for the correct operation of the
electronic eye for the ice bin level control, by
placing one hand between the sensing “eyes”
located in the ice spout, to interrupt the light
beam.
This interruption will cause an immediate
extinguishing of the 1st RED LED and after
about 6 seconds causes the shutoff of the unit
with the simultaneous lighting of the 6th YELLOW
LED signalling the full bin situation (Fig.6).
Allow the resumption of the light beam previously
interrupted and after about 6 seconds the flaker
will resume - through the 3 minutes STAND-BY
period - the ice making process with the
extinguishing of the YELLOW LED.
E. Check for the correct CUT-OUT and
CUT-IN of the float reservoir water level sen-
sors by shutoff the valve on the water supply line.
This will cause a gradual decrease of the water
level in the float reservoir and as soon as the level
gets below the sensors, the flaker stops to ope-
rate and the 5thYELLOW warning LED will glow
to signal the shortage of water (Fig.5).
NOTE. The water level sensor detects the
presence of sufficient water in the float
reservoir and confirms it to the micro
processor by maintaining a low voltage
current flow between the two sensors using
the water as conductor.
WARNING. The use of de-mineralized
water (water with no salt content) having
an electrical conductivity lower than 30
µS, will cause the ability of the water
sensors to vanish with the consequent
CUT-OUT of the flaker operations and the
glowing of the YELLOW LED of shortage
of water, even though that water is indeed
in the reservoir.
FIG. 6
FIG. 5