Icematic DX 40, Service Manual

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OPERATING INSTRUCTIONS
Start up
After having correctly installed the ice maker and
completed the plumbing and electrical
connections, perform the following “Start-up”
procedure.
A. Remove top and upper front panel to be
sure that the tapes securing the curtain and the
spray platen to the evaporator chamber have
been removed.
B. Give power to the unit to start it up by
switching “ON” the power line main disconnect
switch.
The 1st GREEN LED will glow together with the
GREEN LED located in the front of the cube
dispenser.
NOTE. Every time the unit
returns under power, after
having been switched off, both
the water inlet valve and the
hot gas valve get energized
for a period of 5 minutes, thus
to admit new water to the
machine sump reservoir to fill
it up and, eventually, to wash-
off any dirt that can have
deposited in it during the unit
off period (Fig.1).
C. During the water filling operation, check to
see that the incoming water dribbles, through the
evaporator platen dribbler holes, down into the
sump reservoir to fill it up and also that the
incoming surplus of water flows out through the
overflow pipe into the drain line.
During the water filling phase the components
energized are:
THE WATER INLET SOLENOID VALVE
THE HOT GAS SOLENOID VALVE
THE WATER DRAIN VALVE
NOTE . If in the 5 minutes length of the water
filling phase the machine sump reservoir
does not get filled with water up to the rim of
the overflow pipe, it is advisable to check:
1.The water pressure of the water supply line
that must be at least 1 bar (14 psig) Minimum
(Max 5 bar-70 psig).
2.The filtering device installed in the water
line that may reduce the water pressure
below the Minimum value of 1 bar (14 psig).
3. Any clogging situation in the water circuit
like the inlet water strainer and/or the flow
control.
D. At completion of the
water filling phase (5 minutes)
the unit switches automatically
into the freezing cycle with the
start up of:
COMPRESSOR
WATER PUMP
FAN MOTOR
(in air cooled version)
and the glowing of the
6th RED LED (Fig.2).
OPERATIONAL CHECKS
E. Install, if necessary, the refrigerant service
gauges on both the high side and low side
service valves to check the compressor head
and suction pressures.
NOTE.
On air cooled models the head
(condensing) pressure is kept between 8 and
10 bar (110 and 140 psig) with ice machine at
21
°
C (70
°
F) ambient temperature. The above
mentioned head pressure values change
accordingly to the ambient temperature (rising
with the rise of the temperature) and to the
ventilation of the unit.
In the water cooled models, the head pressure
is kept at 9 bar (125 psig) by a water regulating
valve.
F. Check to see through the curtained ice
discharge opening that the spray system is
correctly seated and that the water jets uniformely
reach the interior of the inverted mold cups; also
make sure that the plastic curtain is hanging
freely and there is not excessive water spilling
through it.
G. The ice making process takes place thereby,
with the water sprayed into the molds that gets
gradually refrigerated by the heat exchange
occuring with the refrigerant flowing into the
evaporator serpentine.
During the freezing process,
when the evaporator temperatu-
re falls to reach 0
°
C (32
°
F) the
evaporator temperature sensor,
located in contact with the
evaporator serpentine, supplies
a low voltage power signal to the
electronic control device
(P.C.BOARD) which in first
instance generates the glowing
of the 5th RED LED located in
the front of the printed circuit
board (Fig.3).
FIG. 1
FIG. 2
FIG. 3
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