Scotsman AF Series User manual

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Page 1
SCOTSMAN EUROPE - FRIMONT SPA
Via Puccini, 22 - 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.com
E-Mail: [email protected]
ISO 9001 - Cert. n. 0080
SERVICE MANUAL
AF 80
AF 100
AF 200
AF 20
AF 30
S
Electronic flakers
with storage
MS 1000.73 REV. 05/2009

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Page 2
TABLE OF
CONTENTS Table of contents page 2
Specifications AF 80 3
Specifications AF 100 5
Specifications AF 200 7
Specifications AF 20 9
Specifications AF 30 11
GENERAL INFORMATION AND INSTALLATION
Introduction 13
Unpacking and Inspection 13
Location and levelling 13
Electrical connections 14
Water supply and drain connections 14
Final check list 14
Installation practice 15
OPERATING INSTRUCTIONS
Start up 16
Operational checks 18
PRINCIPLE OF OPERATION (How it works)
Water circuit 21
Refrigerant circuit 21
Mechanical system 23
Operating pressures 24
Components description 25
ADJUSTMENT, REMOVAL AND REPLACEMENT PROCEDURES
Adjustment of the evaporator water level 28
Replacement of evaporator temperature sensor 28
Replacement of condenser temperature sensor 28
Replacement of ice level light control 28
Replacement of the gear motor rotation and speed sensor 28
Replacement of the reservoir water level sensor 29
Replacement of P.C. Board 29
Replacement of the ice spout 29
Replacement of the auger, water seal, bearings and coupling 29
Replacement of the gear motor assy 30
Replacement of fan motor 30
Replacement of drier 30
Replacement of the freezing cylinder 30
Replacement of air cooled condenser 31
Replacement of water cooled condenser 31
Replacement of water regulating valve (water cooled models) 31
Replacement of compressor 32
Wiring diagram 33
Service diagnosis 34
MAINTENANCE AND CLEANING INSTRUCTIONS
General 36
Icemaker 36
Cleaning instructions of water system 36

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Page 3
SPECIFICATIONS
ice making capacity
ELECTRONIC FLAKER MODEL AF 80
NOTE.Withtheunitin“built-in”conditions,the ice production isgraduallyreduced in respect tothe
levels shown in the graph, up to a maximum of 10% at room temperatures higher than 32 ° C.
The daily ice-making capacity is directly related to the condenser air inlet temperature, water
temperature and age of the machine.
To keep your SCOTSMAN FLAKER at peak performance levels, periodic maintenance checks
must be carried out as indicated on page 36 of this manual.
Important operating requirements:
MIN MAX
- Air temperature 10°C (50°F) 40°C (100°F)
- Water temperature 5°C (40°F) 40°C (100°F)
- Water pressure 1 bar (14 psi) 5 bars (70 psi)
- Electr. voltage
variations fromvoltage
rating specified
on nameplate -10% +10%
32
38
10
21
75
70
65
60
55
50
45
Kg.
32 °C21 15
°C
o
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
38
10
21
75
70
65
60
55
50
45
Kg.
32 °C21 15
°C
o
o
WATER COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.

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Page 4
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
AF80 - MACHINE SPECIFICATIONS
Dimensions:
HEIGHT (less legs) 813 mm.
HEIGHT (with legs) 933 mm.
WIDTH 535 mm.
DEPTH 621 mm.
WEIGHT 72 Kg.
230/50/1 2.2 11 330 7.5 3 x 1.5 mm210
S. Steel 1/4 25 Kg.
AF80 AS Air 53**
AF80 WS Water 300*
* A 15°C water temperature

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SPECIFICATIONS
ice making capacity
ELECTRONIC FLAKER MODEL AF 100
Important operating requirements:
MIN MAX
- Air temperature 10°C (50°F) 40°C (100°F)
- Water temperature 5°C (40°F) 40°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 FLAKER at peak performance levels, periodic maintenance checks
must be carried out as indicated on page 36 of this manual.
32
38
10
21
120
115
110
105
100
95
90
85
80
Kg.
10 °C
27 21 15
°C
o
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.

Page 6
Page 6
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
AF100 - MACHINE SPECIFICATIONS
Dimensions:
HEIGHT (less legs) 1006 mm.
HEIGHT (with legs) 1126 mm.
WIDTH 592 mm.
DEPTH 622 mm.
WEIGHT 72 Kg.
* A 15°C water temperature
230/50/1 2.2 11 400 9 3 x 1.5 mm210
S. Steel 1/4 32 Kg.
AF 100 AS Air 85**
AF 100 WS Water 600*

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SPECIFICATIONS
ice making capacity
ELECTRONIC FLAKER MODEL AF 200
NOTE.Thedailyice-makingcapacityisdirectlyrelatedtothecondenserairinlettemperature,water
temperature and age of the machine.
To keep your SCOTSMAN FLAKER at peak performance levels, periodic maintenance checks
must be carried out as indicated on page 36 of this manual.
Important operating requirements:
MIN MAX
- Air temperature 10°C (50°F) 40°C (100°F)
- Water temperature 5°C (40°F) 40°C (100°F)
- Water pressure 1 bar (14 psi) 5 bars (70 psi)
- Electr. voltage
variations fromvoltage
rating specified
on nameplate -10% +10%
32
38
10
21
120
115
110
105
100
95
90
85
80
Kg.
32 10 °C
27 21 15
°C
o
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
38
10
21
120
115
110
105
100
95
90
85
80
Kg.
°C
°C
o
o
WATER COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.

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Page 8
AF 200 AS Air 100*
AF 200 WS Water 580*
S. Steel 3/8 32 Kg.
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
AF 200 - MACHINE SPECIFICATIONS
Dimensions:
HEIGHT (less legs) 1006 mm.
HEIGHT (with legs) 1126 mm.
WIDTH 592 mm.
DEPTH 622 mm.
WEIGHT 72 Kg.
* A 15°C water temperature
230/50/1 3.5 18 760 12 3 x 1.5 mm210

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SPECIFICATIONS
ice making capacity
ELECTRONIC FLAKER MODEL AF 20
Important operating requirements:
MIN MAX
- Air temperature 10°C (50°F) 40°C (100°F)
- Water temperature 5°C (40°F) 40°C (100°F)
- Water pressure 1 bar (14 psi) 5 bars (70 psi)
- Electr. voltage
variations fromvoltage
rating specified
on nameplate -10% +10%
32
38
10
21
120
115
110
105
100
95
90
85
80
Kg.
32 10 °C
27 21 15
°C
o
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
38
10
21
120
115
110
105
100
95
90
85
80
Kg.
32 10 °C
27 21 15
°C
o
o
WATERCOOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
NOTE.Thedailyice-makingcapacityisdirectlyrelatedtothecondenserairinlettemperature,water
temperature and age of the machine.
To keep your SCOTSMAN FLAKER at peak performance levels, periodic maintenance checks
must be carried out as indicated on page 36 of this manual.

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Page 10
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
AF20 - MACHINE SPECIFICATIONS
Dimensions:
HEIGHT (less legs) 1006 mm.
HEIGHT (with legs) 1126 mm.
WIDTH 969 mm.
DEPTH 613 mm.
WEIGHT 97 Kg.
* A 15°C water temperature
230/50/1 3.2 17 500 11 3 x 1 mm210
S. Steel 3/8 70 Kg.
AF 20 AS Air 120**
AF 20 WS Water 600*

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SPECIFICATIONS
ice making capacity
ELECTRONIC FLAKER MODEL AF 30
Important operating requirements:
MIN MAX
- Air temperature 10°C (50°F) 40°C (100°F)
- Water temperature 5°C (40°F) 40°C (100°F)
- Water pressure 1 bar (14 psi) 5 bars (70 psi)
- Electr. voltage
variations fromvoltage
rating specified
on nameplate -10% +10%
32
38
10
21
190
180
170
160
150
140
130
120
110
Kg.
32 10 °C
27 21 15
°C
o
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
38
10
21
190
180
170
160
150
140
130
120
110
Kg.
32 10 °C
27 21 15
°C
o
o
WATER COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
NOTE.Thedailyice-makingcapacityisdirectlyrelatedtothecondenserairinlettemperature,water
temperature and age of the machine.
To keep your SCOTSMAN FLAKER at peak performance levels, periodic maintenance checks
must be carried out as indicated on page 36 of this manual.

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S. Steel 1/2 70 Kg.
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
AF30 - MACHINE SPECIFICATIONS
Dimensions:
HEIGHT (less legs) 1006 mm.
HEIGHT (with legs) 1126 mm.
WIDTH 969 mm.
DEPTH 613 mm.
WEIGHT 105 Kg.
* A 15°C water temperature
230/50/1 3.8 20 600 14 3 x 1 mm210
AF 30 AS Air 185*
AF 30 WS Water 840*

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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 AF series icemakers.
The Electronic Flakers are quality designed,
engineered and manufactured.
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. Remove the front and the rear panels of the
unit 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. (Leg package and water inlet and
outlet hoses are located in the storage bin
compartment).
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
inside the storage bin and the 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.
11. If necessary fit the four legs into their seats
on the machine base and adjust them to the
desired level.
C. LOCATION AND LEVELLING
WARNING.ThisIceFlakerisdesignedfor
indoorinstallationonly.Extendedperiods
of operation at temperature exceeding
the following limitations will constitute
misuseunderthetermsoftheSCOTSMAN
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:
a) Minimum room temperature 10°C (50°F)
and maximum room temperature 40°C (100°F).
b) Water inlet temperatures: minimum 5°C
(40°F) and maximum 35°C (90°F).
c) Wellventilatedlocationforaircooledmodels
(Clean the air cooled condenser at frequent
intervals).
d) Service access: adequate space must be
leftforallserviceconnectionsthroughtherearof
the ice maker. A minimum clearance of 15 cm
(6")mustbeleftatthesidesoftheunitforrouting
cooling air drawn into and exhausted out of the
compartment to maintain proper condensing
operation of air cooled models.
2. Leveltheunitinboththelefttorightandfront
to rear directions.
D. ELECTRICAL CONNECTIONS
See data plate for current requirements to
determine wire size to be used for electrical
connections.AllSCOTSMANicemakersrequire
a solid earth wire.

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Page 14
All SCOTSMAN ice machines are supplied from
thefactorycompletelypre-wiredandrequireonly
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).
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.
WATER SUPPLY
Connect the 3/4" GAS male of the water inlet
fitting,usingtheflexiblehosesuppliedtothecold
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.
WATERSUPPLY-WATERCOOLEDMODELS
The water cooled versions of SCOTSMAN Ice
Makersrequiretwoseparateinletwatersupplies,
one for the water making the flaker ice and the
other for the water cooled condenser.
Connect the 3/4" GAS male fitting of the water
inlet, using the flexible hose supplied to the cold
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.
WATER DRAIN
The recommended drain tube is a plastic or
flexiblehosewith18mm(3/4")I.D.whichrunsto
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.
WATER DRAIN - WATER COOLED MODELS
Connect the 3/4" GAS male fitting of the
condenserwaterdrain,utilizingasecondflexible
hose to the open trapped and vented drain.
Thisadditionaldrainlinemustnotinterconnectto
any other of the units drains.
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? (IMPORTANT)
4. Have all the electrical and plumbing
connectionsbeenmade, andis thewatersupply
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. Havetheboltsholdingthecompressordown
been checked to ensure that the compressor is
snugly fitted onto the mounting pads?

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Page 15
11. 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.
12. Hastheownerbeengiventhenameandthe
phone number of the authorized SCOTSMAN
Service Agency serving him?
8. Check all refrigerant lines and conduit lines
to guard against vibrations and possible failure.
9. Have the bin liner and cabinet been wiped
clean?
10. Has the owner/user been given the User
Manualandbeeninstructedontheimportanceof
periodic maintenance checks?
G. INSTALLATION PRACTICE
1. Hand shut-off valve
2. Water filter
3. Water supply line
(flexible hose)
4. 3/4" GAS male fitting
5. Power line
6. Main switch
7. Drain fitting
8. Vented drain
9. Open trapped vented
drain
WARNING. This icemaker is not designed for outdoor installation and will not function in
ambient temperatures below 10°C (50°F) or above 40°C (100°F).
This icemaker will malfunction with water temperatures below 5°C (40°F) or above 35°C
(90°F).

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2
1
L
N
COMPRESSOR
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S E N S O R S
DATA PROCESSOR
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
T>1°C
OPERATING INSTRUCTIONS
B. Elapsedthe3minutes-standbyperiod-the
unit starts operating with the activation in
sequence of the following assemblies:
GEAR MOTOR
COMPRESSOR
FAN MOTOR (if unit is an air cooled version)
kept under control by the condenser temperatu-
resensorwhichhasitsprobewithinthecondenser
fins (Fig.2).
C. After 2 or 3 minutes from the compressor
start up, observe that flaker ice begins dropping
off the ice spout to fall into the storage bin.
NOTE.Thefirst icebitsthat dropintothe ice
storagebinarenotsohardastheevaporating
temperaturehas notyetreached thecorrect
operating value. It is necessary to allow the
ice - just made - to cure itself and wait for
about ten minutes for the evaporating tem-
perature to reach the correct value so to
make more hard bits of ice.
L
N
11
10
9
1
2
7
8
6
5
4
3
13
12
FIG. 1
START UP
Afterhavingcorrectlyinstalledtheicemakerand
completed the plumbing and electrical
connections, perform the following “Start-up”
procedure.
A. Openthewatersupplylineshutoffvalveand
puttheunitunderelectricalpowerbymovingthe
mainswitch, onthe powersupply line,to theON
position.
The first LED - GREEN - will glow to signal that
unit is under power.
NOTE. Every time the unit is put under
power,afterbeingkeptforsometimeinshut-
offconditions(electricallydisconnected)the
RED LED will blink for 3 minutes after which
the unit will start up with the immediate
operation of the gear motor assembly and,
after few seconds, of the compressor assy
(Fig.1).

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Page 17
FIG. 2
2
1
L
N
COMPRESSOR
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S E N S O R S
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
T 40÷50°C
DATA PROCESSOR
L
N
11
10
9
1
2
7
8
6
5
4
3
13
12
FIG. 3
2
1
L
N
COMPRESSOR
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S E N S O R S
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
T>75°C
DATA PROCESSOR
L
N
11
10
9
1
2
7
8
6
5
4
3
13
12

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Page 18
FIG. 4
2
1
L
N
COMPRESSOR
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S E N S O R S
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
DATA PROCESSOR
L
N
11
10
9
1
2
7
8
6
5
4
3
12
13
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) due to an insufficient
quantity of refrigerant in the system, the
evaporatingtemperaturesensordetectssuch
anabnormalsituationandstopsconsequently
the unit operation (drive motor keeps on
working for 3' delay then stops).
Inthiscircustance,the5thwarningYELLOW
LED will blink.
The machine will remain in OFF mode for
one hour then it will restart automatically.
In case the unit trips OFF again in alarm for
3timesin3 hours,themachineSHUTSOFF
DEFINITIVELY.After havingdiagnosed and
eliminatedthecauseofthepoorevaporating
temperature (insufficient refrigerant in the
system, etc.) it is necessary to unplug and
plug in again to restart the machine.
Theunit,beforeresumingthetotaloperation,
willgothroughtheusual3minutesSTAND-
BY period.
OPERATION CHECKS UPON THE UNIT
START UP
D. Removefrontservicepanelandifnecessary
install the refrigerant service gauges on the
corresponding Service valves to check both the
HI and LO refrigerant pressures.
NOTE.Onair cooledmodels,thecondenser
temperature sensor, which is located within
the condenser fins, keep the head (conden-
sing) pressure between 8.5 and 9.5 bar
(120 ÷ 135psig)-(17and18baronAF30only).
Incaseofcondensercloggingsuchtoprevent
the proper flow of the cooling air or, in case
the fan motor is out of operation or shortage
of water in the water cooled condenser, the
condenser temperature rises and when it
reaches70 ° C(160 ° F)-foraircooledversion
-and60 ° C(140 ° F)-forwatercooledversion
- the condenser temperature sensor shuts-
off the ice maker (drive motor keeps on
working for 3' delay then stops) with the
consequent light-up of the RED WARNING
LIGHT (Fig.3).
The machine will remain in OFF mode for
one hour then it will restart automatically.
In case the unit trips OFF again in alarm for
3timesin 3hours,themachineSHUTS OFF
DEFINITIVELY.
After having diagnosed the reason of the
temperaturerise and removed itscause,it is
necessary to proceed as per the previous
“NOTE”to startupagain theoperation of the
ice maker.
E. Check for the correct CUT-OUT and
CUT-IN of the float reservoir water level
sensorsbyfirstshuttingclosedthewatershutoff
valve on the water supply line.

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Page 19
FIG. 5
2
1
L
N
COMPRESSOR
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S E N S O R S
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
DATA PROCESSOR
L
N
11
10
9
1
2
7
8
6
5
4
3
12
13
This will cause a gradual decrease of the water
levelinthefloatreservoirandassoonasthelevel
gets below the sensors, the flaker stops to ope-
rate (drive motor keeps on working by 3' delay
then stops) 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-OUToftheflakeroperations and the
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
YELLOW LED goes off while the RED LED
starts blinking.
After3minutestheunitresumesitstotaloperation
with the immediate start-up of the gear motor
and, 2 seconds later, of the compressor.
F. Check for correct operation of the ice level
control, by clogging ice spout opening and wait
until ice, which built up inside the spout, cuts the
light beam of the sensing eyes.
Wait the built up of the ice into the ice chute till it
cuts the light beam of the sensing "eyes".
Thisinterruptionwillcauseanimmediateblinking
oftheBinFullYELLOWLEDlocatedonthefront
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 simulta-
neous lighting (steady) of the Same LED
signalling the full bin situation (Fig. 5).
Remove the hand to discharge the ice into the
storagebinsotoallowtheresumptionofthelight
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.

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Page 20
NOTE. The ICE LEVEL CONTROL
(INFRA-RED SYSTEM) is independent of
the temperature however, the reliability of
its detection can be affected by external
light radiations or by any sort of dirt and
scale sediment which may deposit
directly on the light source and on the
receiver.
To prevent any possible ice maker
malfunction, due to negative affection of
the light detector, it is advisable to locate
the unit where it is not reached by any
direct light beam or light radiation, also
it is recommended to keep the bin door
constantly closed.
NOTE.InthefrontofthePCBoardislocated
a small I/R Trimmer directly connected with
the optical Ice level control. By means of its
screw it is possible to modify the signal
received from the Ice Level control so to
overcamesomeproblemcausedbydirtand/
or low power supply.
Whenadjusted it isvery important tocheck
for its correct operation using ice (NOT
HAND) to break the Infrared Beam. In case
the machine doesn't stop it means that the
new setting is too much powerfull and need to
bereducedalwaysbymeansoftheI/RTrimmer.
M. Ifpreviouslyinstalled,removetherefrigerant
service gauges and re-fit the unit service panels
previously removed.
N. Instruct the owner/user on the general
operation of the ice machine and about the
cleaning and care it requires.