Scotsman AFC 134 User manual

Page 1
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
AFC 134
S
Electronic cubelets
with storage
REV. 12/2010

LED STATUS REASON WHY – SIGNIFICATION – SIGNIFICATO – Beschreibung
ON STEADY
FIXE
FISSO
Ständig an
UNIT OFF AT BIN FULL
CABINE PLAINE
CONTENITORE PIENO
Maschine AUS, Speicher voll!
BLINKING SLOW
CLIGNOTANT LENT
LAMPEGG. LENTO
Blinkt langsam
I/R BEAM CUTTED
FAISCEAU INFRA ROUGE CELLULE NIVEAU GLACE INTERROMPU
RAGGIO INFRAROSSO INTERROTTO
Lichtschranke unterbrochen!
BLINKING FAST
CLIGNOTANT RAPIDE
LAMPEGG. VELOCE
Blinkt schnell
I/R ON AFTER TRIP OFF AT BIN FULL
FAISCEAU INFRA ROUGE CELLULE NIVEAU GLACE ETABLI
RAGGIO INFRAROSSO RIPRISTINATO INTERROTTO
Speicher entleert, Maschine startet gleich!
ON STEADY
FIXE
FISSO
Ständig an
NO WATER
MANQUE D’EAU
MANCANZA ACQUA
Kein Wasser!
ON STEADY
FIXE
FISSO
Ständig an
TOO HI DISCHARGE PRESSURE/TEMPERATURE
COUPURE HP
FERMATA ALTA TEMP. CONDENSAZIONE
Zu hoher Kondensationsdruck
BLINKING
CLIGNOTANT
LAMPEGGIANTE
Blinkt
DELAY AT START UP (3 min. or 60 min. according to the Jumper setting)
TEMPORISATION AU DEMARRAGE (3 min ou 60 min. selon le reglage du chavalier)
RITARDO PARTENZA (3' o 60’ in funzione della regolazione del ponticello)
3 min. oder 60 min. Startverzögerung je nach Jumper Konfig.!
BLINKING 3 TIMES AND REPEAT
CLIGNOTANT 3 FOIS ET NOUVEAU
LAMPEGGIANTE 3 VOLTE
BLINKT 3 MAL und wiederholen
TOO LOW ROOM TEMP (< +3°C)
COUPURE TRES BASSE TEMP. AMBIANTE (< +3°C)
FERMATA TEMP. AMBIENTE BASSA (< +3°C)
Zu hoher Raumtemp. < +3°C!
ON STEADY
FIXE
FISSO
Ständig an
NO, SLOW OR WRONG ROTATION OF DRIVE MOTOR
MOTOREDUCTEUR TOURNE A L'ENVERS, NE TOURNE PAS, OU TROP LENTEMENT
MOTORE RIDUTTORE GIRA AL CONTRARIO, NON GIRA O GIRA LENTAMENTE
Keine, zu langsame oder schwere Getriebrotation!
BLINKING
CLIGNOTANT
LAMPEGGIANTE
Blinkt
TOO HI EVAP. TEMP. (> 0C°) AFTER 10' FROM START UP OR TOO LOW EVAP. TEMP. (< -25°C)
COUPURE TEMP. EVAP. >0°C APRES 10' DE FONCTIONNEMENT OU TEMP. EVAP. <-25°C
TEMP. EVAP >0 °C DOPO 10' DA INIZIO FUNZIONAMENTO O INFERIORE A -25°C
Zu hohe Verd.temp. > 0°C 10 min. nach dem Start oder zu niedrige Verd.temp. < -25°C
ON STEADY
FIXE
FISSO
Ständig an
BLINKING
CLIGNOTANT
LAMPEGGIANTE
Blinkt
CONDENSER SENSOR OUT OF ORDER
SONDE CONDENSEUR HS
SONDA CONDENSATORE MALFUNZIONANTE
Kondensatorfühler defekt!
EVAPORATOR SENSOR OUT OF ORDER
SONDE EVAPORATEUR HS
SONDA EVAPORATORE MALFUNZIONANTE
Verdampferfühler defekt!
BLINKING ALTERNATE
CLIGNOTANT ALTERNE’
LAMPEGGIANTE ALTERNATO
Blinkt im Wechsel!
OPTICAL ICE LEVEL CONTROL OUT OF ORDER
CELLULE INFRAROUGE NIVEAU GLACE HS
SONDA ALL’INFRAROSSO LIVELLO GHIACCIO MALFUNZIONANTE
Lichtschranke defekt!
BLINKING
CLIGNOTANT
LAMPEGGIANTE
Blinkt
6 OR 12 MONTHS WATER SYSTEM CLEANING REMIND (according to the Jumper setting)
RAPPEL NETTOYAGE SYSTÉME HYDAULIQUE APRÉS 6 OU 2 MOIS (selon reglage. chavalier)
RICHIAMO PULIZIA CIRCUITO IDRICO DOPO 6 O 12 MESI (In funzione regolazione ponticello)
6 oder 12 Monate Reinigungshinweis für Wassersystem je nach Jumper Konfig.!
BLINKING IN SEQUENCE
CLIGNOTTANT EN SEQUENCE
LAMPEGGIANTE IN SEQUENZA
Blinken nacheinander!
PURGE CYCLE IN OPERATION (Only on units equipped with purge valve)
CYCLE D’ÉVACUATION EAU EN FONCTION (Seulement dans les machine equipées avec vanne de vidange
eau)
SISTEMA SCARICO ACQUA IN FUNZIONE (Solo negli apparecchi dotati di valvola di scarico)
Spülzyklus läuft, bei Maschinen mit Ablaßventil!
BLINKING
CLIGNOTANT
LAMPEGGIANTE
Blinken
UNIT OFF DUE TO THE JUMPER ON TEST CONTACTS
MACHINE A L’ÂRRET – CONTACTS TEST FERMÉES
MACCHINA FERMA – CONTATTI TEST CHIUSI
Jumper Konfig. Im Testmodus!
PUSH AND HOLD THE RED LIGHTED SWITCH OR THE PC BOARD BUTTON FOR MORE OF 5 SECONDS WITH MACHINE IN OPERATION
TILL THE SWITCHING OFF OF THE TWO YELLOW LEDS TO RESTART THE CLEANING REMIND COUNTDOWN
APPUYER SUR LE BOUTON ROUGE OU SUR LE BOUTON DE LA CARTE POUR 5 SECONDES AVEC LA MACHINE EN FONCTIONNEMENT
JUSQU’A L’ETEINTE DE LES DEUX LEDS JAUNE POUR REINITIALISER L'ALARME JUSQU'AU PROCHAIN DETARTRAGE
PREMERE IL PULSANTE ROSSO O IL PULSANTE DELLA SCHEDA PER PIU' DI 5" CON LA MACCHINA IN FUNZIONE FINO ALLO
SPEGNIMENTO DEI DUE LED GIALLI PER FAR RIPARTIRE IL CONTEGGIO PER LA PROSSIMA DISINCROSTAZIONE
Drücken und halten Sie den roten Schalter oder den push button auf der Elektronik, für mehr als 5 Sekunden wenn die Maschine in Betrieb ist, bis
die 2 gelben LED´s auf der Elektronik nicht mehr leuchten!
Der Erinnerungszyklus für die Reinigung ist somit zurückgesetzt und startet neu!

Page 2
Page 2
TABLE OF
CONTENTS Table of contents page 2
Specifications 3
GENERAL INFORMATION AND INSTALLATION
Introduction 5
Unpacking and Inspection 5
Location and levelling 5
Electrical connections 5
Water supply and drain connections 6
Final check list 6
Installation practice 7
OPERATING INSTRUCTIONS
Start up 8
Operational checks 10
PRINCIPLE OF OPERATION (How it works)
Water circuit 13
Refrigerant circuit 13
Mechanical system 15
Operating pressures 16
Components description 17
ADJUSTMENT, REMOVAL AND REPLACEMENT PROCEDURES
Adjustment of the evaporator water level 21
Replacement of evaporator temperature sensor 21
Replacement of condenser temperature sensor 21
Replacement of ice level light control 21
Replacement of the gear motor rotation and speed sensor 21
Replacement of the reservoir water level sensor 22
Replacement of P.C. Board 22
Replacement of the ice spout 22
Replacement of the auger, water seal, bearings and coupling 22
Replacement of the gear motor assy 23
Replacement of fan motor 23
Replacement of drier 24
Replacement of the freezing cylinder 24
Replacement of air cooled condenser 24
Replacement of water cooled condenser 24
Replacement of water regulating valve (water cooled models) 25
Replacement of compressor 25
Wiring diagram 26
Service diagnosis 28
MAINTENANCE AND CLEANING INSTRUCTIONS
General 30
Icemaker 30
Cleaning instructions of water system 30

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Page 3
SPECIFICATIONS
ice making capacity
ELECTRONIC CUBELET MODEL AFC 134
NOTE.Withtheunitin“built-in”conditions,theiceproductionisgraduallyreducedinrespecttothe
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 CUBELET at peak performance levels, periodic maintenance checks
must be carried out as indicated on page 30 of this manual.
Important operating requirements:
MIN MAX
- Air temperature 10°C (50°F) 40°C (100°F)
- Water temperature 5°C (40°F) 35°C (90°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
131
129
127
125
123
121
119
117
115
113
111
109
107
105
103
101
99
97
95
93
91
89
87
85
83
81
79
77
75
73
Kg.
10 °C
27 21 15
°C
o
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
32
38
10
21
131
129
127
125
123
121
119
117
115
113
111
109
107
105
103
101
99
Kg.
10 °C
27 21 15
°C
o
o
WATER COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32

Page 4
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
AFC 134 - MACHINE SPECIFICATIONS
Dimensions:
HEIGHT (less legs) 795 mm.
HEIGHT (with legs) 915 mm.
WIDTH 950 mm.
DEPTH 605 mm.
WEIGHT 79 Kg.
230/50/1 3.8 16 3 x 1.5 mm210
AFC 134 AS Air 130**
AFC 134 WS Water 900*
S. Steel 3/8 40 Kg.
* A 15°C water temperature
600
500 13.7 12.2

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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 AFC 134 icemakers.
The Electronic Cubelet is are quality designed,
engineered and manufactured.
Its ice making system is 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.

Page 6
Page 6
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
connectionsbeen made,and isthe watersupply
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 7
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).

Page 8
Page 8
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
startup,observethatcubeleticebeginsdropping
off the ice spout to fall into the storage bin.
NOTE.Thefirstice bits that dropintotheice
storagebinarenotsohardastheevaporating
temperaturehas not yet reachedthecorrect
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, onthepower supplyline,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(electrically disconnected)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 9
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

Page 10
Page 10
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
3timesin3hours,themachineSHUTS OFF
DEFINITIVELY.After havingdiagnosedand
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.Onaircooledmodels,the condenser
temperature sensor, which is located within
the condenser fins, keep the head (conden-
sing) pressure between 17 and 18 bar.
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
3timesin3hours,the machineSHUTS OFF
DEFINITIVELY.
After having diagnosed the reason of the
temperatureriseandremoveditscause,itis
necessary to proceed as per the previous
“NOTE”to start up againtheoperation 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.

Page 11
Page 11
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-OUTofthe flaker operations 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
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 putting some ice so to cut the light
beam of the sensing eyes.
Thisinterruptionwillcauseanimmediateblinking
oftheBinFullYELLOWLEDlocatedonthefront
of the P.C. Board and after about 10 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).
Removethe icebin soto allowthe resumptionof
thelightbeampreviouslyinterrupted.Afterabout
10seconds theflaker willresume -through the3
minutes STAND-BY period - the ice making
process with the extinguishing of the YELLOW
LED.
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.

Page 12
Page 12
NOTE. During the life of the machine the Ice
Level Control may require a recalibration
mainlywhentheglassofthetwoopticaleyes
are covered by a thin lay of scale.
To do it just follow the following procedure:
• With unit OFF push and old the Reset
Button of the PC Board
• Give power to the machine through the
Green Master Switch
• Hold the PC Board Reset Button till the
leds start to blink/flash (more or less 10
seconds)
• Release the PC Board Reset Button
The Optical Ice Level Control is now
recalibrated.
CheckforthecorrectoperationoftheOptical
Ice Level Control by plasing a handfull of ice
in between the two eyes.
The Bin Full yellow led must start to blink/
flash immediately and, 10 seconds later, the
machine must trip OFF.
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.

Page 13
Page 13
WATER CIRCUIT
Thewaterenterinthemachinethroughthewater
inlet fitting which incorporates a strainer and it is
located at the rear side of the cabinet and then it
goestothewaterreservoirflowingthroughafloat
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
current flow between them signalling in this
way to the P.C. Board the presence of the
waterinthereservoir.Incasethewaterused
is very soft (de-mineralized) or the float
reservoirgetsemptythecurrentflowbetween
the sensors become so weak or is no longer
maintained that, as consequence, the P.C.
Boardshutofftheflakeroperation(drivemotor
keepsonworkingby3'delaythenstops)with
the simultaneous glowing of the YELLOW
LED signalling “Shortage of water”.
Thefloat reservoiris positionedat theside ofthe
freezing cylinder at such an height to be able to
maintainaconstantwaterlevelaroundthefreezer
auger.
Infact,thewaterflowsfromthereservoirintothe
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.
Theice,beingcostantlyliftedup,meetthetoothed
point of the ice breaker which is fitted on the top
end of the auger, where it gets compacted,
cracked and forced to change from vertical into
PRINCIPLE OF OPERATION
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”locatedonthesidesoftheicespout.
As the ice level raises to interrupt the light beam
running between the two infrared Leds, the unit
stops after six seconds (compressor first and 3'
later the gear reducer), with the simulteneous
glowingoftheYELLOWLEDsignallingthe“Full
Bin” situation.
NOTE. The interruption of the light beam
betweenthetwolightsensorsisimmediately
signalled by the blinking of the BIN FULL
YELLOW LED located on the front of the
P.C. Board.
After about 10" of steady interruption of
the light beam the unit stops (drive motor
keepsonworkingby3'delaythenstops)and
the“Full Bin” YELLOW LED glows steady.
The ten 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 gets scooped out from the storage
bin, the light beam between the two sensors
resumes(fastblinkingofYELLOWLED)andten
seconds later the ice machine restarts the ice
making process - going always through the 3'
stand by - 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
beingsuckedintothecompressortoberecirculated.
The refrigerant heat pressure is kept between
twopre-setvalues17÷18 bar -245÷260 psigby
thecondensertemperature sensorwhichhasits
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
ICE SPOUT
FLOAT TANK FLOAT VALVE
FREEZER
FREEZER WATER
FEED LINE
WATER INLET LINE

Page 14
Page 14
FIG. 6
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<1°C
DATA PROCESSOR
the MICRO-PROCESSOR of the P.C. Board
which energizes, through a TRIAC, the Fan
Motor in ON-OFF mode.
When the opposite situation occures, i.e. the
condensertemperature getsbelow thepre-fixed
NOTE.Incasethecondensertemperatureprobe
s enses that the condenser temperature has
rised to 70 ° C (160 ° F) - on air cooled versions
- or 60 ° C (140 ° F) - on water cooled versions -
for one of the following abnormal reasons:
CLOGGEDCONDENSER(Aircooledversion)
INSUFFICIENT FLOW OF COOLING
WATER (Water cooled version)
FAN MOTOR OUT OF OPERATION (Air
cooled version)
AMBIENTTEMPERATUREHIGHERTHEN
43 ° C (110 ° F)
itcausesthetotalandimmediateSHUT-OFF
ofthemachine(drivemotorkeepsonworking
by3'delaythenstops)inordertopreventthe
unitfromoperatinginabnormalanddangerous
conditions. When the ice maker stops on
account of this protective device, there is a
simultaneousglowingoftheREDLED,warning
the user of the Hi Temperature situation. The
machine will remain in OFF mode for one hour
thenitwillrestartautomatically.Incasetheunit
tripsOFFagain inalarmfor3timesin3hours,
the machine SHUTS OFF DEFINITIVELY.
After having eliminated the source of the
excessivecon-densertemperature,torestart
theicemachineitisnecessarytounplugand
pluginagain.The RED LEDstarts blinking
andthreeminuteslatertheflakerunitresume
its normal operating mode. The condenser
temperature sensor has a further safety
function which consist in preventing the unit
from operating in Lo-ambient conditions i.e.
when the condenser body temperature -
equivalent to the ambient temperature - is
lower then 1 ° C 34 ° F(Fig.6).Assoonas the
ambient temperature rises up to 5 ° C (40 ° F)
the PC Board will automatically restarts the
machinethroughthethreeminutes delay time.
L
N
11
10
9
1
2
7
8
6
5
4
3
12
13
limit, the temperature sensor changes again its
electrical resistance reducing therefore the
current flow to the P.C. Board to cause a
temporary stop of the Fan Motor.
On the water cooled versions, the refrigerant
head pressure is kept at the constant value of
17 bar (245 psig) by the metered amount of
water passing through the condenser which is
regulated by the action of the Water Regulating
Valvethathasitscapillarytubeconnectedtothe
liquidrefrigerantline.Aspressureincreases,the
waterregulatingvalveopenstoincreasetheflow
of cooling water to the condenser.
ACCUMULATOR
CAPILLARY TUBE
COMPRESSOR
DISCHARGE LINE
CONDENSER
SUCTION LINE
FAN MOTOR
EVAPORATOR

Page 15
Page 15
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 or rotating at
lower speed the unit will stop immediately
withthe glowing of the WARNING YELLOW
LED on account of the intervention of the
ElectromagneticSafety Device -based on
Hall Effect principle.
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
3timesin3hours,the machineSHUTS OFF
DEFINITIVELY.
After having diagnosed and eliminated the
source of the failure, to restart the unit it is
necessary to 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.
FIG. 7
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
The refrigerant suction or Lo-pressure sets - in
normalambient conditions(21 °C)-on thevalue
of 2.9 bar (42 psig) after few minutes from the
unit start-up.
Thisvaluecanvaryof0.1or0.2bar(1.5 ÷ 3psig)
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)
the ice maker stops (compressor first and 3'
later the gear reducer) and the 5TH
WARNING YELLOW LED blinks.
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
3timesin3hours,themachineSHUTS OFF
DEFINITIVELY.
MECHANICAL SYSTEM
The mechanical system of the SCOTSMAN
Flaker machines consists basically of a gear
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

Page 16
Page 16
REFRIGERANT METERING DEVICE:
capillary tube
REFRIGERANT CHARGE (R 404 A)
air cooled water cooled
AFC 134 380 gr 300 gr
NOTE.Beforechargingtherefrigerantsystem
always check the type of refrigerant and
quantity as specified on the individual ice
machine dataplate.
Therefrigerantchargesindicatedarerelatives
to averages operating conditions.
OPERATING PRESSURES
(With 21°C ambient temperature)
Discharge pressure:
Air cooled version 17 ÷18 bar
245 ÷260 psig
Water cooled version 17 bar
245 psig
Suction pressure: 2.9 bar
42 psig

Page 17
Page 17
A. GREEN MASTER SWITCH PUSH
BUTTON
Located in the front of the machine it’s used to
switchON andOFF theunit bypushing itsgreen
push button. When ON, its green light is ON as
well.
B. RED ALARM/RE-SET PUSH BUTTON
Located in the front of the machine (just beside
theMasterSwitch) itworks inconjuctionwiththe
PC Board and it’s activated when:
• Consensing temperature is higher then 70°C
(aircooledversion)-ONsteadywithmachine
in OFF mode
• Consensing temperature is higher then 60°C
(water cooled version) - ON steady with
machine in OFF mode
• Condenser sensor out of order - Blinking
twiceandrepeatwithmachineinOFFmode
• Condenser air filter need to be cleaned - ON
steady with machine in ON mode
• Water system need to be cleaned - Slow
blinking with machine in ON mode.
On the first two cases it’s possible to Re-Set the
operation of the machine pushing and hold the
Red Alarm Re-Set Button by 5" till the Red Light
is OFF.
On the third case, it’s necessary first to replace
the condenser sensor then, push and hold for 5"
the Red Re-Set Button.
C. EVAPORATOR TEMPERATURE
SENSOR
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. In case the evaporating temperatu-
re, after 10 minutes from the unit start-up, does
not go below -1°C (30°F) due to shortage of
refrigerant in the system the evaporator sensor
signal reaching the microprocessor is such to
stop immediately the unit operation (drive motor
keepsonworkingby3'delaythenstops),withthe
5th Warning YELLOW LED that blinks.
NOTE.ThemachinewillremaininOFFmode
for one hour then it will restart automatically.
In case the unit trips OFF again in alarm for
3timesin3hours,themachineSHUTS OFF
DEFINITIVELY.
Torestarttheunitaftertheshutoffcausedby
the hi evaporating temperature, it is neces-
sary to switch OFF and ON the power line
main disconnect Switch.
COMPONENTS DESCRIPTION D. WATER LEVEL SENSOR
Thissensorsystemconsistoftwosmallstainless
steelrods vertically fittedonthe inner face ofthe
reservoir cover and electrically connected to the
low voltage circuit of the P.C. Board.
When the cover of the reservoir is positioned in
its place the tips of both the rods dip into the
reservoir water and detects and signals its
presence by making use of its electrical
resistance.
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
the shutoff of the machine (drive motor
keeps on working by 3' delay then stops), to
protect it from running with an interrupted or
inadequatewatersupply.Inthissituationthe
YELLOW LED will glow to warn of the
machine shutoff and the reason why.
E. CONDENSER TEMPERATURE SENSOR
The condenser temperature sensor probe,
located within the condenser fins (air cooled
version) or in contact with the tube coil (water
cooledversion) detectsthe condensertempera-
ture variations and signals them by supplying
current, at low voltage, to the P.C. BOARD.
In case the condenser temperature sensor
detects a temperature at the condenser lower
than +1°C (33°F) that signify that the ambient
temperature is at the same value, therefore it is
too low for the correct unit operation, the sensor
signalstothemicroprocessortostopimmediately
or to do not start the unit operations up to the
momentthattheambient temperaturewillriseto
more acceptables conditions (5°C).
In the air cooled versions, in relation to the
differentcurrentreceived,themicroprocessorof
theP.C.BOARDsupplies, throughaTRIAC,the
power at high voltage to the fan motor so that it
can cool the condenser and reduce its temperature.
In the event the condenser temperature rises
andreaches70°C or60°Cthecurrentarrivingto
the micro processor is such to cause an immediate
and total stop of the machine operation (drive
motor keeps on working by 3' delay then stops).
NOTE. The machine will remain in OFF
modeforonehourthenitwillrestartautoma-
tically. In case the unit trips OFF again in
alarm for 3 times in 3 hours, the machine
SHUTS OFF DEFINITIVELY.
Torestarttheunitaftertheshutoffcausedby
thehicondensertemperature,it isnecessary
to switch OFF and ON the power line main
disconnect Switch.

Page 18
Page 18
F. GEAR MOTOR ROTATION AND SPEED
SENSOR
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 YELLOW LED.
Aboutthe samereaction occureswhen thedrive
motor will tend to rotate in the wrong direction
(counterclockwise) situation that, if it occures,
willgreatlyaffectallthefreezerandgearreducer
components.
NOTE.ThemachinewillremaininOFFmode
foronehourthenitwillrestartautoma-tically.
In case the unit trips OFF again in alarm for
3timesin3hours,themachineSHUTS OFF
DEFINITIVELY. To restart the unit after the
shutoff caused by this safety device, it is
necessary first to eliminate the cause that
has generated the intervention of the device
and then switch OFF and ON the power line
main disconnect switch.
G. ICE BIN LEVEL LIGHT CONTROL
The electronic ice bin level control, located into
theicespout,hasthefunctiontostoptheoperation
oftheice 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 Bin Full
YELLOW LED located in the front of the P.C.
BOARD blinks; in case the light beam gets
interrupted for as long as 10 seconds, the ice
machinestops(drivemotor keepsonworkingby
3' delay then stops) with the glowing-up of the
2nd YELLOW LED to monitor the full ice bin
situation. The 10 seconds of delay prevents that
any minimum interruption of the light beam due
to the regular ice chuting through the ice spout
may stop the operation of the unit.
NOTE. During the life of the machine the Ice
Level Control may require a recalibration
mainlywhentheglassofthetwoopticaleyes
are covered by a thin lay of scale.
To do it just follow the following procedure:
• With unit OFF push and old the Reset
Button of the PC Board
• Give power to the machine through the
Green Master Switch
• Hold the PC Board Reset Button till the
leds start to blink/flash (more or less 10
seconds)
• Release the PC Board Reset Button
The Optical Ice Level Control is now
recalibrated.
CheckforthecorrectoperationoftheOptical
Ice Level Control by plasing a handfull of ice
in between the two eyes.
The Bin Full yellow led must start to blink/
flash immediately and, 10 seconds later, the
machine must trip OFF.
As soon as the ice is scooped out (with the
resumption of the light beam between the two
infrared sensor of ice level control) 10 seconds
later the ice machine resumes its operation with
thesimul-taneousextinguishingthe2ndYELLOW
LED.
H. P.C. BOARD (Data processor)
The P.C. BOARD, fitted in its plastic box located
in the front of the unit, consists of two separated
printed circuits one at high and the other at low
voltageand protectedby fuses.Also itconsistsof
fivealignedLEDS monitoringthe operationof the
machine of six jumpers (TEST used only in the
factory, 60/70°C used to set up the PC Board at
proper safety cut out condensing temperature, 6/
12 M to set up the PC Board to 6 or 12 months
remindopf the watersystemcleaning, PURGE to
activate the operation of the Purge Solòenoid
Valve (used only on the machine equipped with
purge Solenoid Valve), PWD ON to set up the
operation of the Water Drain Pump (used only on
EFCseries)and3'/60?TosetupthePCBoardfor
3 or 60 minutes delay at start up as detailed here
below.

Page 19
Page 19
Moreover the PC Board is equipped with 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
components of the ice maker (compressor, gear
motor, etc.).
The five LEDS, placed in a row in the front of the
P.C. BOARD, monitor the following situations: