Scotsman DXN 100 User manual

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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
DXN 100
DXN 200
Electronic
counter cubelet
ice dispenser
REV. 11/2018

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TABLE OF
CONTENTS
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Table of contents page
Specifications DXN 100
Specifications DXN 200
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
WIRING DIAGRAM AND SERVICE DIAGNOSTIC
Wiring diagram - Dispensing board version
Service diagnosis
MAINTENANCE AND CLEANING INSTRUCTIONS
General
Cleaning instructions of water system

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SPECIFICATIONS
ice making capacity
ELECTRONIC COUNTER CUBELET DISPENSER DXN 100
Important operating requirements:
MIN MAX
- Air temperature 10°C (50°F) 38°C (100°F)
- Water temperature 10°C (50°F) 35°C (95°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 22 of this manual.
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21
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Kg.
10 °C
27 21 15
°C
o
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 Ice bin
cap Water req. lt/24 HR (*)
DXN 100 - MACHINE SPECIFICATIONS
230/50/1 2,4 7,7 370 8,9 3 x 1.5 mm210
DXN 100 AS Air S. Steel 5 Kg 44,5
(*) Ambient t. 32°C / Water t. 21°C

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SPECIFICATIONS
ice making capacity
ELECTRONIC COUNTER CUBELET DISPENSER DXN 200
Important operating requirements:
MIN MAX
- Air temperature 10°C (50°F) 38°C (100°F)
- Water temperature 10°C (50°F) 35°C (95°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 22 of this manual.
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Kg.
10 °C
27 21 15
°C
o
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
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Basic electr. Amps Watts Nr. of wires Amps fuse
Start Electric power cons.
Amps Kwh per 244 Kg
SPECIFICATIONS
Model Cond. unit Finish Ice bin
cap Water req. lt/24 HR (*)
DXN 200 - MACHINE SPECIFICATIONS
230/50/1 4,2 16,1 630 14,5 3 x 1.5 mm210
DXN 200 AS Air S. Steel 10 Kg 62,2
(*) Ambient t. 32°C / Water t. 21°C

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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
theSCOTSMANDXN100andDXN200counter
cubelet ice dispensers.
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 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°C38°C
Water Temperature 10°C35°C
Water pressure 1 bar 5 bar
Voltage -10% +10%
(Compared to the nameplate)
Serviceaccess: adequate spacemustbeleft for
allserviceconnectionsthroughtherearoftheice
maker.
Thismachine isaircooled andsucksairthrough
therightsidepanelandblowsairouttherearand
leftsidepanels.Donotinstallthemachinewhere
the right side air flow might be blocked.
It is important that the machine be installed in a
location where it has enough space around it to
beaccessibleforservice,andminimumof15cm
be allowed at all sides 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.
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).
Themaximumallowablevoltagevariationshould
not exceed -10% and +10% of the data plate

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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
DXN 100 - 200 have the possibility to have the
water connections through the bottom base or
through the rear bottom side of the machine. In
this second case it is necessary to remove the
rear bottom small panel.
WATER SUPPLY
Connect the 3/4" GAS male of the water inlet
fitting,using theflexibletubesupplied tothecold
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
flexibletube 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
After having correctly installed the ice dispenser
and completed the plumbing and electrical
connections, perform the following Start-Up
pro cedure
START UP
A. Open the water supply shutoff valve and
give power by the ON/OFF push button, the
machine enters in the starting delay time with
GearReduceralwaysinoperationandtwocom-
plete purge and refill of the water reservoir, dØ1
(purge time) and dØ2 (refill time) code monitor
this condition on display.
NOTE: Everytimetheunitisputunderpower,
after being kept for some time in shut-off
conditions (electrically disconnected) the
delay starting period will be 15 minutes.
The machine will run an auto calibration of
ice level control showingFØ2 code for few
seconds. Every restart from other operating
conditionswiththeunitelectricallyconnected
it will take only 3 minutes of delay
B. Elapsed the starting delay time, the unit
starts operating (FØ4 code appears on display
forfew seconds) with the activationinsequence
of the following components:
COMPRESSOR
FAN MOTOR Kept under control by the
condenser temperature sensor which has its
probe within the condenser fins.
The Bin Empty light is ON during all start up/delay
time and for the first minutes of operation.
NOTEONLYFOR AUTHORIZED TECHNICIAN
To by-pass the start-up delay perform the
following procedure:
• During the delay time press and hold for 5
seconds both ICE and WATER capacitive
keys simultaneously then release.
• Assoonas“tSt”willappearondisplaykeep
pressed the same capacitive keys until the
units starts the operation.
C. Five minutes after the compressor start up,
the ice begins dropping down in the storage bin,
ice can be dispensed as soon as the Bin Empty
light disappear.
D. The unit will stop the operation when the
storage bin is full of ice and the infrared beam of
theicelevelcontrolisinterrupted for10seconds
continuously.
E. Every 12 hours of operation the units will
make an automatic purge and refill of the water
reservoir and freezer to prevent the growth of
bacteriaand algaewhenmachine isnotworking
for many hours (Night-time and/or Bin full
condition).
OPERATION CHECKS UPON THE UNIT
START UP
F. 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 values.
Incaseofcondensercloggingsuchtoprevent
the proper flow of the cooling air or, in case
t hefan motorisoutofoperation, thecondenser
temperature rises and when it reaches 70 ° C
(160 ° F) the condenser temperature sensor
shuts-off the ice maker with the consequent
light-up of ALARM CODE AØ8. After having
diagnosedthereasonofthetemperaturerise
and removed its cause, it is necessary to
proceed as per the previous “NOTE” to start
up again the operation of the ice maker.
NOTE. If, after ten minutes from the
compressor start-up, the evaporating tem-
perature has not dropped down to a value
lower than -0 ° C (30 ° F) the evaporating tem-
perature sensor detects such an abnormal
situation and stops consequently the unit
operation.
In this circustance, the ALARM CODE AØ6.
After having diagnosed and eliminated the
cause of the poor evaporating temperature
(insufficient refrigerant in the system or
inoperativecompressororevaporatorsensor)
it is necessary to restart the unit. The unit,
before resuming the total operation, will go
through the usual STAND-BY period.
G. Check for the correct CUT-OUT and
CUT-IN of the float reservoir water level sen-
sorsbyshutoffthevalveonthewatersupplyline.
This will cause a gradual decrease of the water
levelinthefloatreservoirandassoonasthelevel
getsbelow thesensors,the unitstopstooperate
andtheALARMCODEAØ1willglowondisplay.
NOTE. The water level sensor detects the
presenceofsufficientwaterinthefloatreservoir
and confirms it to the micro processor by
maintainingalowvoltagecurrentflowbetween
thetwosensorsusingthewate rasconductor.
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-OUTof theflaker operationsand the
glowing of the ALARM CODE AØ1 of
shortageofwater,eventhoughthatwater
is indeed in the reservoir.
After this, open the water supply line shutoff
valve to fill up again the float reservoir.

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After 10 minutes the unit resumes its total
operationwiththeimmediatestart-upofthegear
motor and, 2 seconds later, of the compressor.
H. Check for the correct operation of the
electronic eye for the ice bin level control, by
placing one hand between the sensing “eyes”
located under the storage bin cover, to interrupt
thelightbeam.Thisinterruptionafter10seconds
causestheshutoffoftheunit.Allowtheresumption
ofthelightbeampreviouslyinterruptedandafter
10 seconds the unit will resume - through the 3
minutes STAND-BY period - ice making process.
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,
duetonegativeaffectionofthelightdetector,
itisadvisabletofollowtheinstructionsforthe
periodical cleaning of the light sensor
elementsas detailed inthe MAINTENANCE
AND CLEANING PRO-CEDURES.
I. SETTING OF ICE DISPENSING TIME
(ONLY ICE)
The dispensing time of the ice is factory set at 3”
but it is possible to modify it choosing between:
• From 1” up to 15”
• Continuous
Tochange this timeperformthefollowing proce-
dure:
Openthewatersupplylineshutoffvalveandgive
power by moving the main switch to ON position
andpushgreenON/OFFbuttononthemachine.
Push the Red Alarm button on the display for 10
seconds to enter in the Program Menu, use the
arrows to select “S” then press ICE button to
confirm
Press arrow to select time 1..2..3.. up to 15
seconds or CON for Continuous , then push ICE
to confirm.
Push WATER button for 5 seconds to ESC.
J. SETTING OF DISPENSING MODE
The unit can dispense ice only or ice and water
and it is also possible modify this setting
performing the following procedure:
Push the Red Alarm button on the display for 10
seconds to enter in the Program Menu, use the
arrows to select “H” then press ICE button to
confirm
Press arrows to select “on” for dispensing water
activated or “off” for dispensing water disabled,
then push ICE to confirm.
Push WATER button for 5 seconds to ESC.
K. SETTING OF THE DISPENSING
OPERATION
DXN can be provided with two different
versions:
•Touch(NoOpticalDispensingDevicesinstalled)
•Touchless ( With Optical Dispensing Devices
installed)
The initial setting is already made in factory
according with the version of the unit, in case of
replacement of the P.C. Board perform the
following procedure to set up the dispensing
operation accordingly:
Push the Red Alarm button on the display for 10
seconds to enter in the Program Menu, use the
arrows to select “F” then press ICE button to
confirm
Press arrows to select “tch” for Touch version or
“tcL” for Touchless version , then push ICE to
confirm.
Push WATER button for 5 seconds to ESC.
L. CHECK OF THE DISPENSING
OPERATING MECHANISM
Afterhavingproperlycompletedtheabovesetup
procedures, check the correct operation of the
dispensing mechanism:
Touchless Version:
a) Place a glass or carafe in front of one of the
two Optical Dispensing Devices (Ice and/or
Water)
b) The dispensing drive motor and/or the water
solenoid valve starts to operate with ice and/
orwaterdischargedthroughthebottomplastic
spouts
c) The drive motor remains in operation as per
setting dispensing time; the water inlet
solenoid valve remains in continuous
operation unless the glass of carafe is
removed.
Touch Version:
d) Place a glass or carafe under the plastic
spouts (Ice and/or Water)
e) Push ICE or WATER button , the dispensing
drive motor and/or the water solenoid valve
starts to operate with ice and/or water
dischargedthroughthebottomplasticspouts
c) The drive motor remains in operation as per
setting dispensing time; the water inlet
solenoid valve remains in continuous
operation unless the WATER button is
released.
NOTE. When ice is not dispensed for
more than 30 minutes with the dispenser
in operation and compressor energized,
the drive motor will be activated for two
seconds to rotate the vane in order to
prevent ice block in the bin and optimize
the ice level in the storage bin.
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.