Scotsman TCL 180 User manual

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TCL/S 180
Electronic
counter cubelet
ice dispenser
New PC Board
version
REV. 07/2016
SERVICE MANUAL
Scotsman Ice Srl
Via Lainate, 31 - 20010 Pogliano M.se - Milano - Italy
Tel. [phone] (Aut. Sel.)- Telefax [phone]
Direct Line to Service & Parts:
Phone [phone] - Fax [phone]
Website: www.scotsman-ice.it
E-Mail: [email protected]
ISO 9001 - Cert. n. 0080

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TABLE OF
CONTENTS
2
3
Table of contents page
Specifications
GENERAL INFORMATION AND INSTALLATION
Introduction
Unpacking and Inspection
Location and levelling
Electrical connections
Water supply and drain connections
Final check list
OPERATING INSTRUCTIONS
Start up
Operational checks
PRINCIPLE OF OPERATION (How it works)
Water circuit
Refrigerant circuit
Mechanical system
Operating pressures
Components description
ADJUSTMENT, REMOVAL AND REPLACEMENT PROCEDURES
Wiring diagram - Dispensing board version
Wiring diagram - Push buttons version
Service diagnosis
MAINTENANCE AND CLEANING INSTRUCTIONS
General
Icemaker
Cleaning instructions of water system
5
5
5
5
6
6
7
7
17
18
19
10
10
11
12
13
21
21
21

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SPECIFICATIONS
ice making capacity
ELECTRONIC COUNTER CUBELET DISPENSER TC 180
Important operating requirements:
MIN MAX
- Air temperature 10°C (50°F) 40°C (100°F)
- Water temperature 5°C (40°F) 35°C (100°F)
- Water pressure 1 bar (14 psi) 5 bars (70 psi)
- Electr. voltage
variations fromvoltage
rating specified
on nameplate -10% +10%
NOTE.Thedailyice-makingcapacityisdirectlyrelatedtothecondenserairinlettemperature,water
temperature and age of the machine.
To keep your SCOTSMAN CUBELET DISPENSER at peak performance levels, periodic
maintenance checks must be carried out as indicated on page 21 of this manual.
°C
10
21
32
38
140
130
120
110
100
90
80
70
60
Kg.
32 10 °C
27 21 15
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.

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Start Electric power cons.
Amps Kwh per 24 HR
Basic electr. Amps Watts Nr. of wires Amps fuse
SPECIFICATIONS
Model Cond. unit Finish Comp. HP Ice bin
cap Water req. lt/24 HR
TCL/S 180 - MACHINE SPECIFICATIONS
230/50/1 3.4 18 590 13,2 3 x 1.5 mm210
Air S. Steel 3/8 135
TCS 180 AS
TCL 180 AS 5 Kg.
9 Kg.

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GENERAL INFORMATION AND INSTALLATION
A. INTRODUCTION
This manual provides the specifications and the
step-by-stepproceduresfortheinstallation,start-
up and operation, maintenance and cleaning for
the SCOTSMAN TCL/S 180 counter cubelet ice
dispenser.
Their ice making systems are thoroughly tested
providing the utmost in flexibility to fit the needs
of a particular user.
NOTE.Toretainthesafetyandperformance
built into this icemaker, it is important that
installation and maintenance be conducted
in the manner outlined in this manual.
B. UNPACKING AND INSPECTION
1. CallyourauthorizedSCOTSMANDistributor
or Dealer for proper installation.
2. Visually inspect the exterior of the packing
and skid. Any severe damage noted should be
reportedtothedeliveringcarrierandaconcealed
damageclaimformfilledinsubjettoinspectionof
the contents with the carrier’s representative
present.
3. a) Cut and remove the plastic strip securing
the carton box to the skid.
b)Cutopenthetopofthecartonandremove
the polystyre protection sheet.
c) Pull out the polystyre posts from the
corners and then remove the carton.
4. Removethe topandsidespanels oftheunit
and inspect for any concealed damage. Notify
carrier of your claim for the concealed damage
as stated in step 2 above.
5. Remove all internal support packing and
masking tape.
6. Checkthatrefrigerantlinesdonotrubagainst
or touch other lines or surfaces, and that the fan
blades move freely.
7. Check that the compressor fits snugly onto
all its mounting pads.
8. Use clean damp cloth to wipe the surfaces
outside of the cabinet.
9. See data plate on the rear side of the unit
and check that local main voltage corresponds
with the voltage specified on it.
CAUTION. Incorrect voltage supplied to
the icemaker will void your parts
replacement program.
10. Removethemanufacturer’sregistrationcard
from the inside of the User Manual and fill-in all
parts including: Model and Serial Number taken
from the data plate.
Forward the completed self-addressed
registration card to SCOTSMAN EUROPE
factory.
C. LOCATION AND LEVELLING
WARNING.ThisIceDispenserisdesigned
for indoor installation only. Extended
periods of operation at temperature
exceeding the following limitations will
constitute misuse under the terms of the
SCOTSMAN Manufacturer’s Limited
Warranty resulting in LOSS of warranty
coverage.
1. Position the unit in the selected permanent
location.
Criteria for selection of location include:
Min Max
Air Temperature 10°C40°C
Water Temperature 5°C35°C
Water pressure 1 bar 5 bar
Voltage -10% +10%
(Compared to the nameplate)
Serviceaccess: adequate spacemustbeleft for
allserviceconnectionsthroughtherearoftheice
maker.
Thismachine isaircooled andsucksairthrough
theleftside panel andblowsairouttherear side
ofthetoppanel.Donotinstallthemachinewhere
theleftsideairflowmightbeblocked.Aminimum
clearance of 15 cm is required.
It is important that the machine be installed in a
location where it has enough space around it to
be accessible for service, and minimum of 150
mm be allowed at the left and upper side for air
circulation. Try to avoid hot, dirty and crowded
locations.
NOTE. It is imperativeto do not placeon top
of the machine any sort of goods and leave
theupperlowersopenforproperairexhaust.
D. ELECTRICAL CONNECTIONS
See data plate for current requirements to
determine wire size to be used for electrical
connections.AllSCOTSMANicemakersrequire
a solid earth wire.
AllSCOTSMANicemachinesaresupplied from
the factory completely pre-wired and require
only electrical power connections to the wire
cord provided at the rear of the unit.
Make sure that the ice machine is connected to
its own circuit and individually fused (see data
plate for fuse size).

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Themaximumallowablevoltagevariationshould
not exceed -10% and +10% of the data plate
rating. Low voltage can cause faulty functioning
and may be responsible for serious damage to
the overload switch and motor windings.
NOTE. All external wiring should conform to
national, state and local standards and
regulations.
Check voltage on the line and the ice maker’s
data plate before connecting the unit.
E. WATER SUPPLY AND DRAIN
CONNECTIONS
GENERAL
Whenchoosingthewatersupplyfortheiceflaker
consideration should be given to:
a) Length of run
b) Water clarity and purity
c) Adequate water supply pressure
Sincewateristhemostimportantsingleingredient
in producting ice you cannot emphasize too
much the three items listed above.
Low water pressure, below 1 bar may cause
malfunction of the ice maker unit.
Water containing excessive minerals will tend to
producescalebuild-upontheinteriorpartsofthe
water system while too soft water (with too lo
contents of mineral salts), will produce a very
hard flaker ice.
PLUMBING CONNECTIONS MUST
CONFORM TO ALL APPLICABLE CODES
CONNECT TO POTABLE WATER ONLY
ThemodelTCL/S180hasthepossibility tohave
the water connections through the bottom base
or through the rear bottom side of the machine.
Inthis secondcaseitis necessary toremovethe
rear bottom small panel.
WATER SUPPLY
Connect the 3/4" GAS male of the water inlet
fitting,using theflexibletube suppliedtothecold
water supply line with regular plumbing fitting
and a shut-off valve installed in an accessible
position between the water supply line and the
unit.
If water contains a high level of impurities, it is
advisable to consider the installation of an
appropriate water filter or conditioner.
WATER DRAIN
The recommended drain tube is a plastic or
flexible tube with 18 mm (3/4") I.D. which runs to
an open trapped and vented drain. When the
drain is a long run, allow 3 cm pitch per meter
(1/4" pitch per foot).
Installaverticalopenventondrainlinehighpoint
at the unit drain connection to ensure good
draining.
The ideal drain receptacle is a trapped and
vented floor drain.
NOTE.Thewatersupplyandthewaterdrain
must be installed to conform with the local
code. In some case a licensed plumber and/
or a plumbing permit is required.
F. FINAL CHECK LIST
1. Is the unit in a room where ambient
temperatures are within a minimum of 10°C
(50°F) even in winter months?
2. Is there at least a 15 cm (6") clearance
around the unit for proper air circulation?
3. Is the unit level?
4. Have all the electrical and plumbing
connectionsbeen made, andisthewater supply
shut-off valve open?
5. Has the voltage been tested and checked
against the data plate rating?
6. Hasthewatersupplypressurebeenchecked
to ensure a water pressure of at least 1 bar
(14 psi).
7. Check all refrigerant lines and conduit lines
to guard against vibrations and possible failure.
8. Has the owner/user been given the User
Manualandbeeninstructedontheimportanceof
periodic maintenance checks?
9. Has the Manufacturer’s registration card
been filled in properly? Check for correct model
and serial number against the serial plate and
mail the registration card to the factory.
10. Hastheownerbeengiventhenameandthe
phone number of the authorized SCOTSMAN
Service Agency serving him?

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OPERATING INSTRUCTIONS
START UP
Afterhavingcorrectlyinstalledtheicemakerand
completed the plumbing and electrical connec-
tions,performthefollowing“Start-up”procedure.
A. Openthewatersupplylineshutoffvalveand
give power by moving the main switch, on the
power supply line, to the ON position.
The GREEN LED will glow to signal that unit is
under power.
NOTE.Everytimetheunitisputunderpower,
after being kept for sometime in shut-off
conditions(electricallydisconnected)the 2nd
RED LED will blink for 3 minutes (Fig.1).
B. Elapsedthe3minutes-standbyperiod-the
unit starts operating with the activation in
sequence of the following assemblies:
GEAR MOTOR
COMPRESSOR
FAN MOTOR kept under control by the
condenser temperature sensor which has its
probe within the condenser fins
with the switching off of the 2nd RED LED
(Fig. 2).
C. 2or3minutesafterthecompressorstartup,
observethatflakericebeginsdroppingofftheice
spout to fall into the storage bin.
NOTE. If, after ten minutes from the
compressor start-up, the evaporating tem-
perature has not dropped down to a value
lower than -1 ° C (30 ° F) the evaporating tem-
perature sensor detects such an abnormal
situation and stops consequently the unit
operation.
Inthiscircustance,the3rdwarningYELLOW
LED will blink (Fig.3).
After having diagnosed and eliminated the
cause of the poor evaporating temperature
(insufficient refrigerant in the system or
inoperativecompressororevaporatorsensor)
itisnecessarytopushtheRE-SETBUTTON.
Theunit,beforeresumingthetotaloperation,
willgothroughtheusual3minutesSTAND-
BY period.
OPERATION CHECKS UPON THE UNIT
START UP
D. Remove service panels and if necessary
install the refrigerant service gauges on the
corresponding Service valves to check both the
HI and LO refrigerant pressures.
NOTE. The condenser temperature sensor,
which is located within the condenser fins,
keeps the head (condensing) pressure
between two preset valves.
Incaseofcondensercloggingsuchtoprevent
the proper flow of the cooling air or, in case
the fan motor is out of operation, the
condenser temperature rises and when it
reaches70 ° C(160 ° F)thecondensertempe-
raturesensorshuts-offtheicemakerwiththe
consequent light-up of the 2nd RED
WARNING LIGHT (Fig.4).
After having diagnosed the reason of the
temperatureriseandremoveditscause,itis
necessary to proceed as per the previous
“NOTE”tostart up again theoperationofthe
ice maker.
FIG. 1 BLINKING - FLASHING
3 MINUTES DELAY TIME AT START UP
BLINKING-FLASHING SLOW
INFRARED BEAM CUTTED
WITH MACHINE IN OPERATION
STEADY
MACHINE OFF AT BIN FULL
BLINKING-FLASHING FAST
INFRARED BEAM ON AFTER
THE TRIPPING OFF AT BIN FULL
NO WATER
POWER ON
BLINKING-FLASHING
3 MINUTES DELAY TIME AT START UP
STEADY
TOO HI CONDENSING TEMPERATURE
BLINKING-FLASHING
TOO HI EVAPORATING TEMP.
AFTER 10 MIN. FROM START UP
STEADY
WRONG-NO-SLOW ROTATION
GEAR MOTOR FIG. 2
FIG. 3 BLINKING - FLASHING
TOO HI EVAPORATING TEMP. AFTER 10 MIN.
FROM START UP

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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
operate 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-OUToftheflakeroperations andthe
glowing of the YELLOW LED of shortage
ofwater,eventhoughthatwaterisindeed
in the reservoir.
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.
After3minutestheunitresumesitstotaloperation
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.
Thisinterruptionwillcauseanimmediateblinkof
the1stYELLOWLEDandafterabout6seconds
causes the shutoff of the unit with the simulta-
neous lighting of the same YELLOW LED
signalling the full bin situation (Fig.6).
Allowtheresumptionofthelightbeampreviously
interrupted and after about 6 seconds with
YELLOWLEDblinkingfast,theflakerwillresume
- through the 3 minutes STAND-BY period - the
ice making process with the extinguishing of the
YELLOW LED.
NOTE.TheICELEVELCONTROL(INFRA-
REDSYSTEM)isindependentofthetempe-
rature however, the reliability of its detection
canbeaffectedbydirtandscalesediment
whichmaydepositdirectlyonthelightsource
and on the receiver.
To prevent any possible ice maker
malfunction, due to negative affection of the
light detector, it is advisable to follow the
instructions for the periodical cleaning of
the light sensor elementsasdetailed in the
MAINTENANCE AND CLEANING PRO-
CEDURES.
G. SETTING OF THE DISPENSING
SELECTOR
Setting of the dispensing time
It'spossible tomodifythe dispensingtimeto1.5,
3, 5 or 10 seconds.
FIG. 4
STEADY
TOO HI CONDENSING TEMPERATURE
FIG. 5 NO WATER
FIG. 6
BLINKING - FLASHING SLOW
INFRARED BEAM CUTTED WITH MACHINE IN OPERATION
STEADY
MACHINE OFF AT BIN FULL
BLINKING - FLASHING FAST
INFRARED BEAM ON AFTER THE TRIPPING OFF AT BIN FULL

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buttons and a second with ICE/WATER +
ICE/WATER and CONTINUOUS push buttons.
To check for the correct operation of the
dispensing mechanism:
a) Select first the Dispensing Mode by
pushing the proper switch;
b)Placeaglassoracarafeinfrontofthetwo
Optical Dispensing Devices.
c) The dispensing drive motor and/or the
water solenoid valve starts to operate with ice
and/or water discharged through the bottom
plastic spout.
The drive motor and/or the water solenoid valve
remains in operation as per setting dispensing
time unless the glass or carafe is removed.
PushtheCONTINUOUSswitchandcheckagain
for the dispensing mechanism operation as per
steps above.
The drive motor and/or the water solenoid valve
now remains in operation till the glass or carafe
is removed.
EVO Version
a) Place a glass or a carafe in front of the two
Optical Dispensing Devices.
b) The dispensing drive motor starts to operate
with icedischargedthroughthebottomplastic
spout.
The drive motor remains in operation as per
factory set dispensing time 3" not adjustable.
I. Ifpreviouslyinstalled,removetherefrigerant
service gauges and re-fit the unit service panels
previously removed.
J. Instruct the owner/user on the general
operation of the ice machine and about the
cleaning and care it requires.
To modify the original setting time (5 seconds):
a) Push and old the 4th switch "CONTI-
NUOUS" for 10 seconds till the first 3 lights start
to blink
b) Push the 1st switch (ICE) for 5 seconds
Push the 2
nd
switch (ICE+WATER) for 10 seconds
Push the 3st switch (WATER) for 1.5 seconds
Pushthe4
th
switch(CONTINUOUS)for3seconds
Setting of resume mode (default)
To modify the original resume mode (ICE) push
for 5 seconds the desired switch ICE,
ICE+WATER or WATER.
Dispensing Time and mode EVO Version
Thisatouchfreedispensingmodel,withonlyICE
configuration and no push button in the front
panel.
Dispensingtimeisfactorysetat3"notadjustable
once a glass or a carafe is placed in front of the
two Optical Dispensing Devices.
H. CHECK OF THE DISPENSING
OPERATING MECHANISM
Electronic Version
There are two different versions of dispensing
label;onewithjustICEandCONTINUOUSpush

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WATER CIRCUIT
The water enter in the machine through the
water inlet fitting (which incorporates a strainer
and it is located at the rear side of the cabinet)
and then it goes to the water reservoir flowing
through a float valve.
NOTE.Thepresenceofthewaterinthefloat
reservoir is detected by a system of two
sensors which operates in conjunction with
the P.C. Board. The two sensors use the
waterasaconductortomaintainalowvoltage
currentflowbetweenthem.Incasethewater
usedisverysoft(de-mineralized)orthefloat
reservoirgetsemptythecurrentflowbetween
thesensors become so weak or is no longer
maintained that, as consequence, the P.C.
Board shutoff the flaker operation with the
simultaneous glowing of the YELLOW LED
signalling “Shortage of water”.
Thefloatreservoirispositionedatthesideofthe
freezing cylinder at such an height to be able to
maintainaconstantwaterlevelaroundthefreezer
auger. In fact, the water flows from the reservoir
into the bottom inlet of the freezing cylinder to
sorround the stainless steel auger which is
vertically fitted in the center of the freezer.
Inthefreezertheincomingwatergetschilledinto
soft (slush) ice which is moved upward by the
rotating action of the auger. The stainless steel
auger that rotates counter-clockwise within the
freezer, is powered by a direct drive gear motor
andcarriestheiceupwardalongtherefrigerated
freezer inner walls and by doing so the ice gets
progressively thicker and harder.
The ice, being costantly lifted up, meet the tooth
oftheicebreakerwhichisfittedonthetopendof
theauger,whereitgetscompacted,crackedand
forced to change from vertical into horizontal
motion to be discharged out, through the ice
spout, into the storage bin.
By running the ice maker, i.e. by putting the unit
underpower,startstheautomaticandcontinuous
icemakingprocesswhichwouldnotstopuntilthe
ice storage bin gets filled-up to the level of the
control “eyes” located on the sides of the ice
spout.Asthe ice levelraisestointerrupt the light
beam running between the two infrared lamps,
the unit stops after six seconds, with the
simulteneous glowing of the YELLOW LED
signalling the “Full Bin” situation.
NOTE. The interruption of the light beam
betweenthetwolightsensorsisimmediately
signalledbythe blinkingofthe1st YELLOW
LED located on the front of the P.C. Board.
After about 6" of steady interruption of the
light beam the unit stops and the “Full Bin”
YELLOW LED glows.
The six seconds of delay prevent the unit
from stopping for any undue reason like the
momentarily interruption of the light beam
causedbytheflakesthatslidesalongtheice
spout before dropping into the bin.
As some ice is dispensed from the storage bin,
thelightbeambetweenthetwosensorsresumes
and immediately the 1st YELLOW LED blinks
fast; six seconds later the ice machine restarts
the ice making process and the YELLOW LED
goes off.
REFRIGERANT CIRCUIT
The hot gas refrigerant discharged out from the
compressorreachesthecondenserwhere,being
cooled down, condenses into liquid.
Flowing into the liquid line it passes through the
drier filter, then it goes all the way through the
capillarytubewhereitloosessomeofitspressure
sothatitspressureandtemperaturearelowered.
Next, the refrigerant enters into the evaporator
coil wrapped around the freezer inner tube.
The water being constantly fed at the interior of
the freezer inner tube, exchange heat with the
refrigerant circulating into the evaporator coil,
thiscausetherefrigeranttoboil-offandevapora-
te, thereby it changes from liquid into vapor.
The vapor refrigerant then passes through the
suctionaccumulatorandthroughthesuctionline
where the refrigerant exchanges heat with the
oneflowingintothecapillarytube(warmer)before
being sucked into the compressor to be
recirculated.
The refrigerant heat pressure is kept between
two pre-set values 9÷10 bar -125÷140 psig by
thecondensertemperaturesensorwhich has its
probe located within the condenser fins - in air
cooled versions.
This condenser temperature sensor, when
senses a rising of the condenser temperature
beyond the pre-fixed limit, changes its electrical
resistance and send a low voltage power flow to
the MICRO-PROCESSOR of the P.C. Board
which energizes, through a TRIAC, the Fan
Motor in ON-OFF mode.
FREEZER
FLOAT TANK
FLOAT VALVE
WATER INLET LINE
ICE SPOUT
FREEZER
WATER
FEED LINE
PRINCIPLE OF OPERATION

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When the opposite situation occures, i.e. the
condensertemperaturegetsbelowthepre-fixed
limit, the temperature sensor changes again its
electrical resistance reducing therefore the
currentflowtotheP.C.Board to cause a tempo-
rary stop of the Fan Motor.
NOTE. In case the condenser temperature
probesensesthatthecondensertemperatu-
re has rised to 70 ° C (160 ° F) for one of the
following abnormal reasons:
CLOGGED CONDENSER
FAN MOTOR OUT OF OPERATION
AMBIENTTEMPERATUREHIGHERTHEN
43 ° C (110 ° F)
it causes the total and immediate SHUT-
OFF of the machine in order to prevent the
unit from operating in abnormal and
dangerous conditions. When the ice maker
stops on account of this protective device,
there is a simultaneous glowing of the 2nd
RED LED, warning the user of the Hi Tem-
perature situation. After having eliminated
the source of the excessive condenser tem-
perature, to restart the ice machine it is
necessary to push the RE-SET button that
protrudes through the control box cover.
The 2nd RED LED starts blinking and
three minutes later the flaker unit resume its
normal operating mode.
The refrigerant suction or Lo-pressure sets - in
normalambientconditions(21°C)-onthevalue
of1bar (14psig) afterfew minutesfromtheunit
start-up.
Thisvalue can vary of 0.1 or 0.2 bar (1.5 ÷ 3 psig)
in relation to the water temperture variations
influencing the freezer cylinder.
NOTE.If,aftertenminutesfromtheunitstart
up, no ice is made and the evaporating
temperature detected by the evaporator
sensor results to be higher than -1 ° C (30 ° F)
theicemakerstopsandthe3RDWARNING
YELLOW LED blinks.
MECHANICAL SYSTEM
The mechanical system of the SCOTSMAN
NuggetIceDispenserconsistsbasicallyofagear
motor assembly which drives, through a ratched
coupling, a worn shaft or auger placed on its
vertical axis within the freezing cylinder.
Thegearmotorismadeofasinglephaseelectric
motor with a permanent capacitor. This motor is
directly fitted in the gear case through which it
drives - in counter clockwise rotation at a speed
of 9.5 r.p.m. - the freezer auger being linked to it
by the ratched coupling.
NOTE. In the event the gear motor will tend
to rotate in the wrong direction (counter-
clockwise) or not rotating at all the unit will
stop immediately with the glowing of the
3RD WARNING YELLOW LED on account
of the intervention of the Electromagnetic
SafetyDevice-basedonHallEffectprinciple.
After having diagnosed and eliminated the
source of the failure, to restart the unit it is
necessary to press the RE-SET push button
or switch OFF and ON the power line main
disconnnect switch (Fig. 7).
The RED LED will start blinking and after
3 minutes the ice maker will resume its total
operations by running first the gear motor
and then the compressor.
When the gear motor rotating speed is slowed
below 1300 r.p.m. from the normal speed of
1400 r.p.m. the Electromagnetic Safety Device
transmits an electrical signal to the
MICROPROCESSOR to stop immediately the
unit operations like it occures for the wrong
rotation,withthelighting-upofthe3RDYELLOW
WARNING LED. This to relieve from the
excessive load all the electrical and mechanical
componentsoftheentireDriveSystemandextend
their durability.
NOTE.Afterhavingdiagnosedandeliminated
the source of the gear motor slow rotation to
restart the unit it is necessary to press the
RE-SET push button or switch OFF and ON
the power line main switch.
NOTE. Any time the machine stops in alarm
the front four LED's start to blink.
ACCUMULATOR
CAPILLARY TUBE
COMPRESSOR
DISCHARGE LINE
CONDENSER
SUCTION LINE
FAN MOTOR
EVAPORATOR
FIG. 7 STEADY
WRONG-NO-SLOW ROTATION GEAR MOTOR

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REFRIGERANT METERING DEVICE:
capillary tube
OPERATING PRESSURES
(With 21°C ambient temperature)
D ischarge pressure: 9 ÷10 bar (125 ÷140 psig)
Suction pressure: 1 bar (14 psig)
REFRIGERANT CHARGE (R 134 A): 370 gr
NOTE.Beforechargingtherefrigerantsystem
always check the type of refrigerant and
quantity as specified on the individual ice
machine dataplate.
Therefrigerantchargesindicatedarerelatives
to averages operating conditions.

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COMPONENT DESCRIPTION
A. EVAPORATOR TEMPERATURE
SENSOR-BLACK2POLESCONNECTOR
- MANUAL RESET
The evaporator sensor probe is inserted into its
tube well, which is welded on the evaporator
outlet line. It detects the temperature of the
refrigerant on the way out from the evaporator
and signals it by suppying a low voltage current
flow to the P.C. Board Micro-Processor.
According to the current received, the micro-
processor let the ice maker to continue its
operations or not. In case the evaporating tem-
perature,after 10 minutes from theunit start-up,
does not go below -1°C (30°F) the evaporator
sensor signal reaching the microprocessor is
suchto stopimmediatelythe unitoperation,with
the 3rd Warning YELLOW LED that blinks.
B. WATER LEVEL SENSOR - RED TWO
POLES CONNECTOR - AUTOMATIC
RESET
Thissensorsystemconsistoftwosmallstainless
steelrodsvertically fitted on the innerfaceofthe
reservoircoverand electrically connected to the
low voltage circuit of the P.C. Board. When the
coverofthereservoirispositionedinitsplacethe
tips of both the rods dip into the reservoir water
and detects and signals its presence by supply
power back to the P.C. Board.
NOTE. In the event of shortage of water in
thereservoiror,incasethewaterusedistoo
soft (de-mineralized) to cause greater
resistence to the current flow (conductivity
lowerthan30 µ S)thissensorsystemcauses
theshutoffofthemachine,toprotectitfrom
running with an interrupted or inadequate
water supply.
In this situation the 5th YELLOW LED will
glow to warn of the machine shutoff and the
reason why.
C. CONDENSER TEMPERATURE SENSOR
- WHITE TWO POLES CONNECTOR -
MANUAL RESET
The condenser temperature sensor probe,
located within the condenser fins detects the
condenser temperature variations and signals
them by supplying current, at low voltage, to the
P.C. BOARD.
In relation to the different current received, the
micro processor of the P.C. BOARD supplies,
throughaTRIAC,thepowerathighvoltagetothe
fan motor so that it can cool the condenser and
reduce its temperature.
In the event the condenser temperature rises
and reaches 70°C the current arriving to the
micro processor is such to cause an immediate
and total stop of the machine operation with the
glowing of the 2nd RED WARNING LED.
NOTE. To restart the unit after the shutoff
caused by the hi condenser temperature, it
is necessary to push the RE-SET button
(after having remedied to the causes of unit
stoppage) or to switch OFF and ON the
power line main disconnect Switch.
D. GEAR MOTOR ROTATION AND SPEED
SENSOR - RED FOUR POLES
CONNECTOR - MANUAL RESET
This safety device is housed on top of the Drive
Motoranddetects-basedonHallEffectprinciple
- the rotating speed and rotating direction of the
drive Motor.
Should the rotating speed drop below
1300 r.p.m. the magnitude measured by this
device is such to signal to the microprocessor to
stop the unit and light-up the 3rd YELLOW LED.
Thesamereactionoccureswhenthedrivemotor
will tend to rotate in the wrong direction
(counterclockwise) or it doesn't rotate at all.
NOTE. To restart the unit after the shutoff
caused by this safety device, it is necessary
firsttoeliminatethecausethathasgenerated
theinterventionofthedeviceandthenpress
the RE-SET push button or switch OFF and
ON the power line main disconnect switch.
FIG. 8 BLINKING - FLASHING TOGETHER
EVAPORATOR SENSOR OUT OF ORDER
FIG. 9 STEADY TOGETHER
CONDENSER SENSOR OUT OF ORDER

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E. ICEBINLEVELLIGHTCONTROL-BLACK
FOUR POLES CONNECTOR -
AUTOMATIC RESET
The electronic ice bin level control, located into
theicespout,hasthefunctiontostoptheoperation
of the ice machine when the light beam between
the light source and the sensor gets interrupted
by the flake ice which accumulates in the spout.
When the light beam is interrupted the 1st
YELLOW LED located in the front of the P.C.
BOARD blinks; in case the light beam gets
interrupted for as long as 6 seconds, the ice
machine stops with the glowing-up of the same
YELLOWLEDtomonitorthefullicebinsituation.
The6secondsofdelaypreventsthatanyminimum
interruption of the light beam due to the regular
ice chuting through the ice spout may stop the
operation of the unit.
As soon as the ice is dispensed out (with the
resumption of the light beam between the two
infraredsensoroficelevelcontrol) the YELLOW
LED blinks fast and after 6 seconds the ice
machine resume its operation with the
simultaneous extinguishing the YELLOW LED.
F. ICE/WATER OPTICAL DISPENSING
DEVICE - BLUE FOUR POLES CONNECTOR
Located on the front of the dispensing area it
consists of the combination of an infrared
Transmitter and Receiver.
When a glass or a carafe is placed in front of the
Infrared sources, the optical device transmits a
signal to the PC Board that is equivalent to
activate the dispensing drive motor which, in
turn,putinrotationadispensingvanethatpushes
the ice towards a rectangular opening located in
the bottom of the storage bin.
Elapsedthedispensingtime(5,10or15seconds
according to the setting) or after have removed
the glass/carafe, the infrared resume its original
conditionswitchingoffthedispensingdrivemotor.
G. FRONT DISPENSING SELECTOR/
DISPLAY - BLACK SIX POLES CONNECTOR
Placed in the upper front part of the dispensing
area it is used to select, according to the version
of the machine:
a) Ice (first switch)
or a) Ice (first switch)
b) Ice and water (second switch)
c) Water - not chilled - (third switch)
It is also possible to set up for "continuous"
dispensing operation just pushing the fourth
switch before or after the selection of the
dispensed product.
Oncecompletedthedispensingselector/display
resumes its original dispensing setting mode.
NOTE. It is possible to modify the original
resume mode (default) by pushing for 5
seconds the corresponding switch (all
machinesaresuppliedfromthefactoryinthe
ICE dispensing mode).
It is also possible to modify the dispensing
time controlled by the PC Board to 1.5, 3, 5
and 10 seconds by:
a)Pushandoltthe 4
th
switch"continuous"
for approximately 10 seconds till the first 3
lights start to blink
b) Pushingthe1
st
switch(ICE)isequivalent
to 5 seconds
Pushing the 2
nd
switch (ICE+WATER) is
equivalent to 10 seconds
Pushingthe3
rd
switch(WATER)isequiva-
lent to 1.5 seconds.
Pushingthe 4
th
switch (CONTINUOUS) is
equivalent to 3 seconds.
H. P.C. BOARD (Data processor)
The P.C. BOARD, fitted in its plastic box located
intherightsideoftheunit,consistsoftwoseparated
printed circuits one at high and the other at low
voltage, protected by three fuses, integrated with
a RE-SET button. Also it consists of six aligned
LEDS monitoring the operation of the machine
and of input terminals for the leads of the sensor
probes as well as input and output terminals for
the leads of the ice maker electrical wires.
The P.C. BOARD is the brain of the system and
it elaborates, through its micro processor, the
signals received from the sensors in order to
control the operation of the different electrical
componentsof the ice maker (compressor, gear
motor, etc.) as well as the dispensing of the ice
and water.
The six LEDS, placed in a row in the front of the
P.C. BOARD, monitor from right to left the
following situations:
RED LED
ON all the time
- Unit shut-off due to a too hi-condensing
temperature > 70°C
Blinking
- 3 minutes start up delay time
YELLOW LED
ON all the time
- Unit shut-off due to the wrong rotation
direction of gear motor
- Unit shut-off due to the too lo speed
of gear motor
Blinking
- Unit shut-off due to a
too hi-evaporating temp.
>-1°C after 10 min of operation
FIG. 10 BLINKING - FLASHING ALTERNATE
OPTICAL ICE LEVEL CONTROL OUT OF ORDER

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Page 15
GREEN LED
- Unit under electrical power
YELLOW LED
- Unit shut-off due to a too lo-water level into
float tank
YELLOW LED
On all the time
- Unit shut-off at storage bin full
Blinking slow
-Infraredbeamcuttedwithmachineinoperation
Blinking fast
-Infrared beam ONaftertrippingOFF at storage
bin full
BOTH RED LEDS STEADY
- Condenser sensor Out of Order
YELLOW AND RED BLINKING TOGETHER
- Evaporator sensaor Out of Order
YELLOW AND RED BLINKING ALTERNATE
- Optical Ice Level Control Out of Order
CALIBRATION OF ICE LEVEL
CONTROL/PC BOARD
Any time the PC Board and/or the Ice Level
Controlarereplaceditnecessarytopereformthe
calibration as per following instructions:
• Switch OFF the machine
• Push and hold the PC Board push button
• Switch ON the machine keepiung pushed the
PC Board push button till all LEDs are ON
• Release the push button
JUMPERS
ThePCBoardisalsoequippedwiththreeJumpers
as detailed in the bottom drawing:
Incase the TESTJumperisclosed, the machine
starts up immediately once connected to the
power with and it will run for few minutes only.
AfterthatthemachineTripsOFFwiththeLedsof
the PC Board blinking.
ALL STEADY
CALIBRATION OF PC BOARD &
OPTICAL ICE LEVEL CONTROL
BLINKING-FLASHING SLOW
INFRARED BEAM CUTTED
WITH MACHINE IN OPERATION
STEADY
MACHINE OFF AT BIN FULL
BLINKING-FLASHING FAST
INFRARED BEAM ON AFTER
THE TRIPPING OFF AT BIN FULL
NO WATER
POWER ON
BLINKING-FLASHING
3 MINUTES DELAY TIME AT START UP
STEADY
TOO HI CONDENSING TEMPERATURE
BLINKING-FLASHING
TOO HI EVAPORATING TEMP.
AFTER 10 MIN. FROM START UP
STEADY
WRONG-NO-SLOW ROTATION
GEAR MOTOR
BLINKING - FLASHING
TOGETHER
EVAPORATOR SENSOR OUT
OF ORDER
BLINKING - FLASHING
ALTERNATE
OPTICAL ICE LEVEL
CONTROL OUT OF ORDER
STEADY
CONDENSER SERNSOR OUT OF
ORDER
BLINKING - FLASHING ALL
TOGETHER
TEST JUMPER IN
NOT USED
JUMPER IN
PURGE VALVE - WHERE USED - NOT ENERGIZED
JUMPER OUT
PURGE VALVE - WHERE USED - ENERGIZED
TEST JUMPER
MUST BE ALWAYS OPEN

Page 16
Page 16
I. FLOAT RESERVOIR
Thefloatreservoirconsistsofaplasticwaterpan
on which is fitted a float valve with its setting
screw. The float valve modulate the incoming
water flow to maintain a constant water level in
thereservoir,levelthatcorrespondstotheonein
the freezing cylinder to ensure proper ice
formation and fluidity.
Onthe innersideof thereservoircoverarefitted
the two water level sensors which detects the
presenceortheshortageofwaterinthereservoir.
NOTE. It is very important to make sure of
thecorrectfittingofthecoveronthereservoir
in order to enable the sensor to efficiently
control the water situation avoiding undue
shutoff interventions.
J. FREEZING CYLINDER (EVAPORATOR)
Thefreezingcylinderismadeofastainlesssteel
verticaltubeonwhichexterioriswrappedaround
the cooling coil with the evaporating chamber
and in its interior is located the auger which
rotates on its vertical axis and it is maintained
alignedby the top andbottom bearings. A water
seal system is located in the bottom part of the
freezer while at the top end is fitted the ice
breaker.
The water constantly flowing into the cylinder
bottompart,freezesintoicewhenincontactwith
the cylinder inner walls. The ice is then lifted up
bytherotatingaugerandcompactedand forced
out by the ice breaker.
K. ICE BREAKER
The ice breaker is made by several rectangular
openingswheretheiceisforcedtopassthrough.
By undergoing this, the ice looses its excess of
water content so it drops into the bin in hard dry
bits of ice.
In the ice breaker it is housed the top bearing
whichismadeoftworollsbearingspositionedto
withstand the auger axial and radial loads. This
bearing is lubricated with a food grade - water
resistant grease.
NOTE.Itisadvisabletochecktheconditions
ofboththelubricantgreaseandthebearings
every six months.
L. DRIVE GEAR MOTOR
This motoreducer is made of a single phase
electric motor with permanent capacitor directly
fitted on a gear box.
The drive motor rotor is kept aligned on its
vertical axis by two ball bearings permanently
lubricated. The gear case contains a train of
three spur gears the first one of which is in fiber
to limit the noise level. All the three gears are
encased in case bearings and are covered by
lubricant grease (MOBILPLEX IP 44).
Two seal rings, one fitted on the rotor shaft and
the other on the output shaft keep the gear case
sealed.
Hovewer, the interior can be inspected and
serviced by unbolting the two halves of the
aluminium gear case housing.
Thegearreduceroutputshaftisconnectedtothe
freezer auger by a ratched coupling which is
made of two toothed halves that engages
themselves only if turned in the correct direction
namely, conterclockwise.
M. FAN MOTOR (Air cooled version)
The fan motor is controlled through the P.C.
BOARDandtheTRIACbythecondensertempe-
raturesensor.Normallyitoperatestodrawcooling
air through the condenser fins.
Incoldambientsituation,thefanmotorcanrunat
intermittanceasthecondenserpressuremustbe
kept between two corresponding head pressure
values.
N. COMPRESSOR
The hermetic compressor is the heart of the
refrigerant system and it is used to circulate and
retrieve the refrigerant throughout the entire
system.Itcompressesthelowpressurerefrigerant
vaporcausingitstemperaturetoriseandbecome
high pressure hot vapor which is then released
through the discharge valve.
O. ICE DISPENSER DRIVE MOTOR
Located on the upper side of the storage bin, it
turnbyamilledshaftthedispensingvaneplaced
inside the round storage bin.
By rotating, the dispensing vane pushes the ice
towards the bottom rectangular opening so to
force the nugget ice to go through the bottom
outlet spout.
P. STORAGE BIN
Round shaped it is located in the front of the ice
machine and has the main reason to store the
nugget ice produced by the evaporator till it
reaches its maximum level controlled by an
infraredopticalsystem.Initsbottomisplacedthe
ice spout as well as the water drain hole.
Inside the ice spout opening is also located the
water outlet tube connected to the solenoid val-
ve.
Q. DISPENSINGWATERSOLENOIDVALVE
(NOT USED ON EVO VERSION)
Energized and controlled by the PC Board, it
allows a metered quantity of not chilled water to
be dispensed through the same opening of the
ice.

Page 17
Page 17
WIRING DIAGRAM - DISPENSING BOARD VERSION
AIR AND WATER COOLED
230/50/1

Page 18
Page 18
WIRING DIAGRAM - PUSH BUTTONS VERSION
AIR AND WATER COOLED
230/50/1

Page 19
Page 19
SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION
Unit will not run Blown fuse in P.C.Board Replace fuse & check for cause of
No LED lighted-up blown fuse
Master switch in OFF position Turn switch to ON position
Inoperative P.C.Board Replace P.C.Board
Loose electrical connections Check wiring
6th Yellow LED glows Dirty ice level control Clean ice level control
5th Yellow LED Shortage or too soft water See remedies for shortage of water
glows or install a mineral salt metering
device
2nd LED glows High head pressure Dirty condenser. Clean
Inoperative fan motor. Replace
3rd Yellow LED blinks Too hi evap. temperature Checkandchargerefrigerantsystem
Shortage or lack of refrigerant
3rd Yellow LED glows Gear motor tends to run on reverse Check gear motor capacitor
Too low gear motor rotating speed Check rotor bearings, freezer
bearings and interior of freezer for
scores. Replace whatever worn or
damaged.
No rotation of gear motor Check for power to drive motor
(16 A fuses)
Check for stator winding
Gear motor starts and stop Check for correct operation of drive
after a while motor magnetic sensor
Check for correct magnetic capacity
of magnetic cylinder
Compressor cycles intermittently Low voltage Check circuit for overloading
Check voltage at the supply to the
building. If low, contact the power
company
Non-condensable gas in system Purge the system
Compressor starting device with Check for loose wires in starting
loose wires device
Low ice production Capillary tube partially restricted Blow charge, add new gas & drier,
afterevacuatingsystemwithvacuum
pump
Moisture in the system Same as above
Low water level in the freezer Adjust to approx 20 mm below ice
spout
Shortage of refrigerant Check for leaks & recharge
Pitted or stained auger surface Clean or replace auger
SERVICE DIAGNOSIS

Page 20
Page 20
SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION
Wet ice Ambinet temperature too high Move unit to cooler location
High water level in the freezer Lower to approx. 20 mm below
ice spout
Faulty compressor Replace
Machine runs but makes no ice Water not entering in the freezer Air look in feed line to freezer.
Clogged feed line to freezer. Clean it
Gear stripped Check and repair
Moisture in the system Purge, replace drier and re-charge
Water leaks Water seal leaking Replace water seal
Water feed line to freezer leaking Check and fasten hose clamp
Float valve not closing Check and adjust float valve
setting screw
Excessive noise or chattering Mineral or scale deposit on auger Remove and manually polish auger
and inner freezer walls and inner walls of freezer barrel
using emery paper
Low suction pressure
Add refrigerant to rise suction pressure
Water feed line to freezer clogged Vent and clean it
Low water level into freezer Adjust to approx. 20 mm below
ice spout
Gear motor noise Worn rotor bearings Check and replace
Shortage or poor lubricant in gear Check for proper lubricant opening
case gear case.
Top of gears must be covered
with lubricant
Gear case bearings and gear Check and replace worn parts
racers worn out
Shortage of water
Strainer at water inlet fitting clogged Remove strainer and clean
Float reservoir water nozzle Remove float valve and clean
clogged-up nozzle
SERVICE DIAGNOSIS