Ice-O-Matic ICEF 155 Service Manual page 11

Page 11
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 YELLOW warning LED will glow to
signal the shortage of water (Fig. 4).
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.
After this, open the water supply line shutoff
valve to fill up again the float reservoir, the
FIG. 5
WATER
LEVEL
GEAR MOTOR
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
RESET
13
13
ROTATION
12 12
11
11
10 10
9
9
L 1
L
1
TRANSF.
2
N
N
2
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, 2 seconds later, of the compressor.
F. Check for the correct operation of the
electronic eye of the ice bin level control, by
placing a hand in front of the ice spout and wait
till the ice cuts the light beam of the sensing
"eyes".
This interruption will cause an immediate 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 with the
simultaneous lighting of the YELLOW LED
(steady) signalling the full bin situation (Fig. 5).
Remove the hand to discharge the ice into the
storage bin so to allow the resumption of the light
beam previously interrupted. 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.
8
8
7 7
RELAYS
6
6
5
5
4
4
3
3
TRIAC
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CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD