Scotsman MVP456 User manual

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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
MVP 456
MVP 606
MVP 806
MVP 1006
REV. 10/2008

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TABLE OF
CONTENTS Page
Specifications 3 ÷10
Water 11
General Installation - Air or Water Cooled 11
Adjustments 13
Water purge setting 13
Prodigy Cuber System Information 14
Controller Information 14
How It Works 15
Electrical Sequence - Air or Water Cooled. 15
Electrical Component Details 16
Refrigeration 18
Water System 18
Control Operation 19
Control Safeties 19
Restarts 19
Control Button Use (from standby) 20
Service Specification 21
Diagnostics – Air Cooled 22-23
Test Procedures - Sensors 24
Ice Thickness Sensor 24
Water Level Sensor 24
Temperature Sensors 25
Test Procedures - Loads 25-28
Controller Differences 28
Wiring diagrams 29-30
Repair Procedures 31
Cleaning, sanitation and maintenance 32-33
INTRODUCTION
This technical manual covers the New Prodigy MVP line.
All models are shipped with an Installation and User’s manual, which can be referred to separately.
General installation information is included in this manual.

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SPECIFICATIONS
MODULAR CUBER MVP 456
NOTE. TokeepyourModularcuberperformingat its maximum capacity, itis necessary to perform
periodic maintenance as outlined on last pages of this manual.
ice making capacity
ICE PRODUCED PER 24 HRS
Kg.
32 °C
15 10
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
°C
10
21
32
38
WATER COOLED MODELS
21
240
220
200
180
160
140
120
ICE PRODUCED PER 24 HRS
Kg.
32 °C
15 10
AMBIENT TEMPERATURE
°C
10
21
32
38
21
255
235
215
195
175
155
135
WATER TEMPERATURE

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SPECIFICATIONS (CONT'D)
Model Cond. unit Finish Comp. HP
MVP 456 - MACHINE SPECIFICATIONS
Water req.
lt/24 HR
Model Basic
electr. amps Start amps watts Electric power cons.
Kwhx24 HR. N. of wires Amps
Fuse
220-240/50/1
MVP 456 - AS
MVP 456 - WS 3x1,5 mm216
Cubes per harvest: 234 Full - 468 Half
* With water at 15°C
Stainless Steel 7/8
4.5
4.0 29 1000
850 23 19.5
Dimensions:
HEIGHT 575 mm. (22" 1/2)
WIDTH 760 mm. (30")
DEPTH 620 mm. (24" 1/2)
WEIGHT 77 Kgs.
MVP 456 - AS Air 410*
MVP 456 - WS Water 2400*

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SPECIFICATIONS
MODULAR CUBER MVP 606
NOTE. Tokeep your Modular cuber performingat its maximum capacity, itis necessary to perform
periodic maintenance as outlined on last pages of this manual.
ice making capacity
Kg.
32 °C
15 10
°C
10
21
32
38
21
335
315
295
275
255
235
215
195
175
Kg.
32 °C
15 10
°C
10
21
32
38
21
335
315
295
275
255
235
215
ICE PRODUCED PER 24 HRS
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
WATER COOLED MODELS
ICE PRODUCED PER 24 HRS
AMBIENT TEMPERATURE
WATER TEMPERATURE

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SPECIFICATIONS (CONT'D)
Model Cond. unit Finish Comp. HP
MVP 606 - MACHINE SPECIFICATIONS
Water req.
lt/24 HR
Model Basic
electr. amps Start
amps watts Electric power cons.
Kwhx24 HR. N. of wires Amps
Fuse
220-240/50/1
MVP 606 - AS
MVP 606 - WS 3x1,5 mm216
Cubes per harvest: 234 Full - 468 Half
* With water at 15°C
Stainless Steel 1 3/8 1 1/2
6,2
5,2 32 1300
1050 28 23
Dimensions:
HEIGHT 575 mm. (22" 1/2)
WIDTH 760 mm. (30")
DEPTH 620 mm. (24" 1/2)
WEIGHT 77 Kgs.
MVP 606 - AS Air 440*
MVP 606 - WS Water 2750*

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SPECIFICATIONS
MODULAR CUBER MVP 806
NOTE.To keep your Modularcuber performing at its maximumcapacity, it is necessary toperform
periodic maintenance as outlined on the last pages of this manual.
ice making capacity
Kg.
32 °C
15 10
°C
10
21
32
38
21
445
425
405
385
365
345
325
305
285
265
245
225
Kg.
32 °C
15 10
°C
10
21
32
38
21
390
370
350
330
310
290
270
ICE PRODUCED PER 24 HRS
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
WATER COOLED MODELS
ICE PRODUCED PER 24 HRS
AMBIENT TEMPERATURE
WATER TEMPERATURE

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MVP 806 - AS Air 580*
MVP 806 - WS Water 3900*
SPECIFICATIONS (CONT'D)
Model Cond. unit Finish Comp. HP
MVP 806 - MACHINE SPECIFICATIONS
Water req.
lt/24 HR
Model Basic
electr. amps Start
amps watts Electric power cons.
Kwhx24 HR. N. of wires Amps
Fuse
MVP 806 - AS
MVP 806 - WS 3x1,5 mm216
Cubes per harvest: 342 Full - 684 Half
* With water at 15°C
Stainless Steel 1 5/8 2.5
231 1850
1450 40 33.4
Dimensions:
HEIGHT 725 mm. (28" 1/2)
WIDTH 760 mm. (30")
DEPTH 620 mm. (24" 1/2)
WEIGHT 97 Kgs.
220-240/50/1
9.0
8.0

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SPECIFICATIONS
MODULAR CUBER MVP 1006
NOTE. Tokeep your Modular cuber performingat its maximum capacity, itis necessary to perform
periodic maintenance as outlined on the last pages of this manual.
ice making capacity
Kg.
32 °C
15 10
°C
10
21
32
38
21
475
455
435
415
395
375
355
335
315
295
275
Kg.
32 °C
15 10
°C
10
21
32
38
21
425
405
385
365
345
325
305
ICE PRODUCED PER 24 HRS
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
WATER COOLED MODELS
ICE PRODUCED PER 24 HRS
AMBIENT TEMPERATURE
WATER TEMPERATURE

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Page 10
MVP 1006 - AS Air 600*
MVP 1006 - WS Water 3800*
SPECIFICATIONS (CONT'D)
Model Cond. unit Finish Comp. HP
MVP 1006 - MACHINE SPECIFICATIONS
Water req.
lt/24 HR
Model Basic
electr. amps Start
amps watts Electric power cons.
Kwhx24 HR. N. of wires Amps
Fuse
MVP 1006 - AS
MVP 1006 - WS 5x1,5 mm210
Cubes per harvest: 342 Full - 684 Half
* With water at 15°C
224 1900
1600 41.3
37
Dimensions:
HEIGHT 725 mm. (28" 1/2)
WIDTH 760 mm. (30")
DEPTH 620 mm. (24" 1/2)
WEIGHT 104 Kgs.
380-400/50/3
Stainless Steel 2
3.5
3.3

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GENERAL INSTALLATION
Air or Water Cooled
Location Limitations:
Theproductisdesignedtobeinstalledindoors,
in a controlled environment. Air cooled models
discharge very warm air into the room out the
back.Spacemustbeallowedattheleftsideand
backforairintake anddischarge.Water cooled
modelsdischargewarmwaterintothebuilding’s
drain. Space needs to be provided on both
sides and above for service access.
Space Limitations
Note:Althoughthemachinewillfunction,ice
capacity of air cooled machines will be
significantly reduced with minimal clearance
at the sides, back and top. Some space is
recommended for service and maintenance
purposes on all models.
15 cm (6") of space at the sides and back are
requiredforadequateoperation.Togetthemost
capacity, locate the machine away from heat
producing appliances and heating ducts.
Airflow is in the left side, out the back (as viewed
from the front).
Environmental Limitations
Minimum Maximum
Air temperature 10°C (50F) 40°C (100F)
Water temperature 5°C (40F) 40°C (100F)
Water pressure 1 bar (14 psi) 5 bar (70 psi)
Power supply - acceptable voltage ranges
Minimum Maximum
115 104 126
230 207 253
Warranty Information
Thewarrantystatementforthisproductisprovided
separately from this manual. Refer to it for
applicable coverage. In general warranty covers
defects in material or workmanship. It does not
cover maintenance, corrections to installations,
or situations when the machine is operated in
circumstancesthatexceedthelimitationsprinted
above.
Plumbing Requirements
All models require connection to cold, potable
water. A hand actuated valve within site of the
machine is required. Air cooled models have a
single 3/4" male inlet water connection.
Water cooled models have the same inlet fitting
plus an additional 3/4" male condenser inlet
water connection.
WATER
The quality of the water supplied to the ice
machinewillhaveanimpactonthetimebetween
cleaningsandultimatelyonthelifeoftheproduct.
Therearetwowayswatercancontainimpurities:
in suspension or in solution. Suspended solids
can be filtered out. In solution or dissolved
solidscannotbefiltered,theymustbedilutedor
treated. Water filters are recommended to
remove suspended solids. Some filters have
treatment in them for suspended solids. Check
with a water treatment service for a
recommendation.
RO water. This machine can be supplied with
Reverse Osmosis water, but the water
conductivity must be no less than 10
microSiemens/cm.
Potential for Airborne Contamination
Installinganicemachinenearasourceofyeast
or similar material can result in the need for
more frequent sanitation cleanings due to the
tendencyofthesematerials tocontaminatethe
machine. Most water filters remove chlorine
from the water supply to the machine which
contributestothis situation.Testinghas shown
thatusing a filter thatdoes not remove chlorine
will greatly improve this situation, while the ice
making process itself will remove the chlorine
fromtheice,resultinginnotasteorodorimpact.
Additionally, devices intended to enhance ice
machinesanitationcanbeplacedinthemachine
to keep it cleaner between manual cleanings.
Water Purge
Cube ice machines use more water than what
ends up in the bin as ice. While most water is
usedduringicemaking,aportionisdesignedto
bedrainedouteverycycletoreducetheamount
of hard water scale in the machine. That’s
known as water purge, and an effective purge
can increase the time between needed water
system cleaning.
In addition, this product has the capability to
automaticallyvarytheamountofwaterpurgeed
based on the purity of the water supplied to it.
Thewater purgerate canalso beset manually.
Adjustments of purge due to local water
conditions are not covered by warranty.

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Water Filters
If connecting to water filtration, filter only the
water to the reservoir, not to the condenser.
Installanewcartridgeifthefilterswereusedwith
a prior machine.
All models require drain tubing to be attached to
them. Air cooled models have a single 21mm
O.D. male drain fitting in the back of the cabinet.
Water cooled models have the same fitting plus
anadditional3/4" male drainfitting in thebackof
the cabinet.
Note: This NSF listed model has a 1" anti-
back flow air gap between the water inlet
tube end and the highest possible reservoir
water level, no back flow device is required
for the potable water inlet.
Drain Tubing:
Use rigid drain tube supplied with machine and
routethemseparately-donotTeeintothebin’sdrain.
Horizontalrunsofdraintubingneeda1/4"fallper
foot of run for proper draining.
Follow all applicable codes.
Electrical
See the spec sheet or User’s Manual for Wire
Size and Maximum Fuse Size ratings.
The machine is supplied with a 1,5 meter length
power cord.
Install the electrical plug accordingly to the local
standard needed.
The dataplate on the back of the cabinet details
the power requirements, including voltage,
phase, minimum circuit ampacity and maximum
fusesize.Extensioncordsarenotpermitted.Use
of a licensed electrician is recommended.
Followallapplicable local, state and national
codes.

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ADJUSTMENTS
Ice Bridge Thickness
Caution: Do not make the bridge too thin or
themachinewillnotharvestproperly.Bridge
thickness adjustments are not covered by
warranty.
Shut machine off.
Access the ice thickness sensor.
Check gap between metal tip and evaporator
grid. Small cube standard gap is 5 mm (3/16"),
mediumcubestandardgapis5,5mm(7/32").To
set, place a 5 mm - 3/16" (small cube) or 5,5 mm
-7/32"(mediumcube)drillbitbetweensensortip
and evaporator to check. Adjust gap using
adjustment screw.
Restart unit and check ice bridge. Repeat as
needed.
WATER PURGE SETTING
The water purge is factory set to the Automatic setting. The setting can be changed to one of 5 manual
settings or placed on automatic. The purge setting shows in the Code Display.
To set:
Switch the machine OFF by holding the Off
button in until a number or the letter A shows on
the display.
PressandreleasetheOnbutton repeatedlyuntil
the number on the display corresponds to the
desired setting.
Press and release the Off switch again to return
to the normal control state.
(very soft
≤4°f)
Soft
water
(5 ≤°f ≤9)
(10≤°f ≤ 16)
Hard
water
(17≤°f ≤ 22)
Very hard
water
( °f ≥23)

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PRODIGY CUBER SYSTEM
INFORMATION
Overall System Type:
• Refrigeration: Mechanical, either air cooled,
water cooled.
• Water System: Inlet water solenoid valve fills
reservoir once per cycle. Purge solenoid valve
opens to discharge some reservoir water once
per cycle.
• Control System: Electronic
• Harvest cycle sensor: Conductivity probe
• Water full/empty sensor: Conductivity probe
• Bin Control: Curtain Switch
• Ice type: Unified
• Harvestsystem:Hotgasdefrostwithmechanical
assist
Electrical Components:
• Compressor
• Contactor
• Water Pump
• Inlet Water Solenoid Valve
• Purge or purge Valve
• Fan Motor(s)
• Fan motor pressure control
• High pressure cut out
• Harvest Assist Solenoid
• Hot Gas Valve
• Controller
• Transformer - 12v AC for the controller only
• Water Level Sensor
• Ice Thickness Sensor
• Curtain Switch
CONTROLLER INFORMATION
Machine Indicator Lights
• Power
• Status
• Water
• Clean
Code Display
Main codes - automatically displayed
F Freeze Cycle
F flashes Freeze Cycle is Pending
H Harvest Cycle
H flashes Manual Harvest
b Binis Full
C Clean Cycle
L Board Locked
d Test Mode
O Off
E Self Test Failed
1 flashes Max Freeze - Retrying
1 Max Freeze Time Shut Down
2 flashes Max Harvest - Retrying
2 Max Harvest Time Shut Down
3 Slow Water Fill
4 High Discharge Temp
5 Sump Temp Sensor Failure
7 Discharge Temp Sensor Failure
8 flashes Short Freeze - Retrying
8 Short Freeze - Thin ice
Setting Codes - requires push button sequence for access
Water Purge Settings
A, 1, 2, 3, 4, 5
De-scale Interval Settings
6, 5, 3, 3
CONTROLLER INFORMATION
Component Indicator Lights
• Condenser Fan
• Water Pump
• Purge Valve
• Water Solenoid
• Hot Gas
• Compressor
• Ready to Harvest
• Sump Empty
• Sump Full
• Curtain SW1
• Curtain SW2 (not used)

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HOW IT WORKS - AIR COOLED
Freeze Cycle. At start up the controller drains
and refills the reservoir. The reservoir refills
when the mid length water level sensor probe is
uncoveredandcontinuestofilluntilthetopprobe
is in contact with water. When the reservoir has
filled, the compressor and water pump start.
Afterthe dischargepressure hasincreased past
thecutinpointofthefanpressurecontrol,thefan
motor(s)willbegintooperateandwarmairwillbe
discharged out the back of the cabinet. The fan
motor will switch on and off as the discharge
pressure rises and falls. Water flows over the
evaporator as the refrigeration system begins to
remove heat. When the water temperature falls
to a preset point, as measured by the water
temperature sensor, the controller shuts off the
water pump for 30 seconds. The freeze cycle
resumeswhen the pump restarts andice begins
to form on the evaporator. As it forms, the water
flowing over the ice moves closer and closer to
themetal tipof theice thicknesssensor. When it
comes into contact with the sensor for a few
continuous seconds, that signals the controller
that the freeze cycle is complete.
The controller may shut the air cooled fan motor
offforavariableperiodoftimetobuildupheatfor
harvest.Thisisdependantuponthetemperature
of the discharge line sensor.
Harvest Cycle. When the harvest cycle begins,
thecontrollershutsoffthefanmotor,switcheson
the hot gas valve, and through a parallel circuit,
the harvest assist solenoid. After a few seconds
thepurge valve opensand wateris drained from
the reservoir. Based on either the automatic
purge or manual purge setting, the pump and
purge valve will be switched off at a time
determined to have drained enough water for
that setting. The inlet water valve will open to fill
the reservoir anytime the mid length probe is
uncovered, which occurs during the reservoir
drain cycle. Harvest continues as the hot
discharge gas flows into the evaporator
serpentine, heating up the evaporator. At the
sametimetheharvestassistsolenoidispushing
against the back of the ice slab. When the ice
releases from the evaporator, it harvests as a
unit,andtheharvestassistprobeprovidessome
additional force to push it off. When the ice falls
off it will force the curtain open. An open curtain
during the harvest cycle signals the controller
thattheevaporatorhasreleaseditsiceterminating
harvest.Ifthecurtainremainsopen,thecontroller
will shut the machine at bin full. Anytime harvest
is complete the hot gas valve and harvest assist
solenoidareshutoff.Theharvestassistsolenoid
pin returns to its normal position by spring
pressure.
If the curtain re-close after harvest, the freeze
cycle will restart.
HOW IT WORKS - WATER COOLED
Freeze Cycle. At start up the controller drains
and refills the reservoir. The reservoir refills
when the mid length water level sensor probe is
uncovered and continues to fill until the top
probeisincontactwithwater.Whenthereservoir
hasfilled,thecompressorandwaterpumpstart.
Afterthedischargepressurehasincreasedpast
the set point of the water regulating valve, the
waterregulatingvalvewillopenand warmwater
will be discharged out the condenser drain. The
water regulating valve will modulate to maintain
a relatively constant discharge pressure. Water
flows over the evaporator as the refrigeration
system begins to remove heat. When the water
temperaturefallstoa preset point,asmeasured
by the water temperature sensor, the controller
shuts off the water pump for 30 seconds. The
freeze cycle resumes when the pump restarts
and ice begins to form on the evaporator. As it
forms, the water flowing over the ice moves
closer and closer to the metal tip of the ice
thickness sensor.
Whenit comes into contact withthe sensorfor a
few continuous seconds, that signals the
controller that the freeze cycle is complete.
Harvest Cycle. When the harvest cycle begins,
thecontrollerswitchesonthehotgasvalve,and
through a parallel circuit, the harvest assist
solenoid. After a few seconds the purge valve
opens and water is drained from the reservoir.
Based on either the automatic purge or manual
purge setting, the pump and purge valve will be
switchedoffatatimedeterminedtohavedrained
enough water for that setting. The inlet water
valve will open to fill the reservoir anytime the
mid length probe is uncovered, which occurs
during the reservoir drain cycle. Harvest
continuesasthehotdischargegasflowsintothe
evaporatorserpentine,heatinguptheevaporator.
At the same time the harvest assist solenoid is
pushing against the back of the ice slab. When
the ice releases from the evaporator, it harvests
as a unit, and the harvest assist probe provides
someadditionalforcetopushitoff.Whentheice
falls off it will force the curtain open. An open
curtain during the harvest cycle signals the
controllerthattheevaporatorhasreleaseditsice
terminatingharvest.Ifthecurtainremainsopen,
the controller will shut the machine at bin full.
Anytime harvest is complete the hot gas valve
and harvest assist solenoid are shut off.
The harvest assist solenoid pin returns to its
normal position by spring pressure.
If the curtain re-close after harvest, the freeze
cycle will restart.
ELECTRICAL SEQUENCE
Air or Water Cooled
Power connected, unit previously switched Off.
Controlboarddoesaselfcheck.Iftheselfcheck
fails,the unitdisplays an E and no further action
will occur.
Iftheselfcheckpasses,thecontrollerwilldisplay
a 0, the curtain light will be ON and the Power
and Sump Empty lights will be ON.
Pushing and releasing the On button will start
the ice making process.

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ThedisplaywillbegintoblinkF.Thecomponent
indicator lights will switch on and off to match
the following process:
The purge valve opens and the water pump
starts to empty the reservoir. This is done to
dischargeanyexcesswaterfromicemeltinginto
the reservoir.
Thehotgasvalveandtheharvestassistsolenoid
are energized.
Theinletwatervalvewillopentofillthereservoir.
The water valve can open any time the water
level is low.
After a few seconds the purge valve closes and
the pump shuts off.
When the reservoir is full the inlet water valve
stops and the compressor switches on. Five
seconds after the compressor starts the hot gas
valve and the harvest assist solenoid are de-
energized.
Light Information: The display shows a non-
blinkingF.ThePowerandStatusLightswillbe
Green. The compressor, fan motor, water
pump, sump full and the curtain switch lights
will be ON.
Theaircooledmodel’sfanmotorwillstarttoturn
when the discharge pressure has built up to the
fan pressure control’s cut in point. This is about
15 seconds after the compressor starts.
The Freeze cycle continues. The compressor,
water pump, fan motor and curtain indicator
lights will be ON. When the reservoir water
temperature falls to a certain preset point, the
water pump will shut off for 30 seconds. This is
the anti-slush period. At this time the controller
checks the conductivity of the water in the
reservoir for the auto-purge feature. After the
water pump restarts the Sump Full light will go
outand neither sumplights will beon for therest
of the freeze cycle.
When the ice has built up enough so that the
water flowing over the evaporator comes into
continuous contact with the ice level sensor, the
Ready to Harvest light will begin to blink on and
off. When it has been On continuously for 3
seconds, the controller will switch the machine
into a Harvest cycle.
ELECTRICAL SEQUENCE
Air or Water Cooled
Indicator Information: The display shows a
non-blinking H. The Power and Status Lights
will be Green. The compressor, hot gas valve
and one curtain switch lights will be ON. After
a few seconds the water pump, purge valve
and inlet water valve lights will come on.
The fan motor(s) shut off and remain off
throughout the harvest cycle.
The harvest assist solenoid is connected in
parallel with the hot gas valve. Although it is
energizedthroughouttheharvestcycle,itspiston
does not move until the ice has become partially
loosenedfromtheevaporatorplateby theaction
of the hot refrigerant gas passing through the
evaporator serpentine.
The water pump and purge valve will shut off
when the purge level setting time has been
reached,eitherthemanualtimeortheautomatic
time. The inlet water valve will remain on until it
fills the reservoir. The Ready to Harvest light will
switchOffwhentheicefallsfromtheevaporator.
Harvest continues until the ice slab is ejected
fromtheevaporatorandfalls,openingthecurtain.
Whenthecurtainopens,themagneticreedcurtain
switchopens,breakingthecircuittothecontroller.
If the curtain re-closes within 30 seconds, the
controllerswitchesthemachinebackintoanother
freeze cycle. If the curtain switch remains open,
thecontroller shutsthe machinedown atbin full.
ELECTRICAL COMPONENT DETAIL
Compressor
• Operated by the compressor contactor. Single
or three phase.
Contactor
• Operatedbythecontrollerandthehighpressure
cutoutswitch.Linevoltagecoil.Whenenergized
the Compressor indicator light will be ON.
Water Pump
• Operated by the controller. When energized,
the Water Pump indicator light will be ON.
Inlet Water Solenoid Valve
• Operated by the controller. Line voltage coil.
When energized, the Water Solenoid indicator
light will be ON.
Purge Valve
• Operated by the controller. Line voltage coil.
When energized, the Purge Valve indicator
light will be ON. Energized for a time during
harvest.
Fan Motor(s)
•Operatedbythecontrollerandthefanpressure
control.Cancycleonandoffinthefreezecycle,
always off during harvest. When the controller
has energized it, the indicator light will be ON
but the fan will not turn unless the discharge
pressure is high enough to close the high
pressure control.
• Fan(s) may shut off near the end of the freeze
cycle to build up heat for harvest. Time of shut
off depends upon available heat, as measured
by the discharge temperature.
High pressure cut out
• Some air cooled and all remote and all water
cooled models have a high pressure cut out
switchthatshutsthepowerofftothecompressor
contactor if the discharge pressure is too high.
It is an automatic reset.

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Page 17
Harvest Assist Solenoid
• Operated by the controller in parallel with the
hotgasvalve.Cyclesonandoffatthebeginning
of a restart. Energized throughout the harvest
cycle. Line voltage coil.
Hot Gas Valve
• Operated by the controller in parallel with the
harvest assist solenoid. Cycles on and off at
thebeginningofarestart.Energizedthroughout
the harvest cycle. Line voltage coil.
Controller
• Sensesicethickness,waterlevel,watertempe-
rature, discharge temperature. Controls
compressorcontactor,fanmotor,waterpump,
inlet water valve, hot gas valve, purge valve,
harvest assist solenoid. Indicates status and
component operation. 12 volt.
Transformer
• 12 volt secondary, supplies power to controller
only.
Water Level Sensor
• Threeprobe conductivitysensor.Bottom probe
is common, mid probe is refill sump, top probe
is full sump. Refill can occur at any time.
Ice Thickness Sensor
• Single wire conductivity sensor. Circuit made
from controller to ground to controller when
water contacts a probe suspended over ice
plate. Signals ready for harvest.
Curtain Switch
•Magnetic reed switch.Normally open,switch is
closed when magnet is nearby and can be
connected to either J8 or J7 of controller.
Curtains may be removed in the freeze cycle
withoutaffectingcontrolleroperation.Acurtain
removedduringharvestwillcausethecontroller
to terminate harvest and shut the unit off. If it
remains open for 30 seconds that signals the
controller to shut the unit off at bin full.
Water temperature sensor.
• Thermistor inserted into the water pump
discharge hose. Reported temperature used
by the controller to determine anti-slush cycle
start time.
Discharge temperature sensor.
• Thermistor attached to the discharge line near
the compressor. Reported temperature used
by the controller to determine end-of-cycle-
fan-off-delay time. If discharge temperature
exceedsapresetmaximum,controllerwillshut
the machine off.
Note: Controller will operate machine in a
default mode with thermistors disconnected
fromthe controller. Diagnostic code #3 will be
displayed during that time.
Component Indicator Light Table
SYSTEM INDICATOR LIGHT ON
Condenser Fan or Liquid Line Valve Fan Motor Powered or LLV open
Water Pump Pump Motor Powered
Purge Valve Purge Valve Opens
Inlet Water Solenoid Valve Inlet Water Valve Opens
Hot Gas Hot Gas Valve Opens
Compressor Contactor Contactor Closes
Ready to Harvest Water contacting ice thickness sensor probe
Sump Empty Open between mid sensor and common
Sump Full Closed between top probe and mid probe
Curtain Switch Curtain open

Page 18
Page 18
REFRIGERATION
Refrigerant: R-404A
Compressors:CopelandorTecumsehhermetic
by model
Expansion valves: Non adjustable, internally
equalized.
Hot gas valve: Pilotoperated,line voltagecoils.
Condensers:Forceddraftair,counterflowwater.
All air cooled models have left side air inlet.
All air cooled models exhaust air out the back.
Air filters: Surface mounted to left side panel.
Filter media removable without removing panel.
Fan blades: Reduced vibration blades in most
air cooled models.
Fan pressure control. All AC. Controls fan
motor operation in the freeze cycle.
High pressure cut out. WC, AC.
Evaporator: Unified cell plate. Nickel plated
copper. Two heights: 12" and 18". Small cube =
half dice, medium cube = full dice.
Smallcube:22mmhighx22mmdeepx9,5mm
high (7/8" high x 7/8" deep x 3/8" high).
Medium cube: 22 mm high x 22 mm deep x
22 mm high (7/8" high x 7/8" deep x 7/8" high).
WATER SYSTEM
Batch type. Water reservoir contains full water
charge for each ice making cycle.
Watervalve:Solenoidtype.Openstofillreservoir
whenmidsensorprobenolongermakesacircuit
tothebottomprobe.Closeswhenreservoirisfull
and top probe makes circuit to mid probe.
Pump: Unsealed pedestal type, S.S. side
mounting bracket
Water purge valve: Solenoid type. Opens to
purge water during harvest cycle.
Water Level Sensor: Threeprobe conductivity.
Distributor:ABSplastic.Evenlydistributeswater
over the evaporator surface. Slides off the
evaporator top. Removable cover for ease of
cleaning.

Page 19
Page 19
CONTROL OPERATION
Standard control:
•Electroniccontrolleroperatingfroma12ACvolt
power supply. Will operate within a voltage
range between 10 and 15.5.
•User’sIndicatorlights,fourfrontvisible:Power,
Status, Water, De-scale/Sanitize.
• Accessible On switch.
• Accessible Off switch.
• Code Display: Displays letters and numbers to
indicate cycles and diagnostic codes.
•ManualHarvestswitch:Usetotriggerharvestat
any time.
• Clean switch: Use to initiate and finish the de-
scale or sanitizing cycles.
• Component Operation Indicator Lights: Indica-
te the status of certain components; water
level;readyforharvest;curtainswitchposition.
• Power Light: On when power is being supplied
to the controller.
• Status Light: Green when machine is in ice
makingmodeandisoperatingcorrectly.Blinks
red when a machine malfunction has been
detected.
•WaterLight:Blinksredwhenreservoirdoesnot
fill with allowed time period.
• De-scale / sanitize: Yellow when the controller
hasdetermineditistimetode-scaleandsanitize
the machine. Use clean process to reset light.
Time is determined by power up time and
controller’s setting. Standard setting is 6
months. See adjustment process
Controller Connections:
• J1 - Ground and Power Supply
• J2 - High voltage power harness to loads
• J3 - Factory use
• J4 - Optional board connector
• J5 - Communications port
• J6 - Thermistor connection
• J7 - Curtain switch
• J8 - Curtain switch
• J9 - Water level sensor
• J10 - Ice thickness sensor
• J11 - Bin thermostat. Use with NO thermostat
(closesontemperaturefall)&specifiedharness.
CONTROL SAFETIES
Max freeze time - 45 minutes
When exceeded, control shuts the unit off for 50
minutesandwillattemptarestart.Ifthecondition
isexceeded again thenext cycle, thecontrol will
shut the unit off for 50 minutes and attempt a
restart. If it fails a third consecutive time the
controller will shut the machine down and must
be manually reset.
Min freeze time - 6 minutes
Ifthecontrollerswitchesthemachineintoharvest
within 20 seconds of the minimum freeze time,
the controller will harvest for a preset time and
does not stop if the curtain switch opens.
If this occurs again in the next three cycles, the
machine will shut down and must be manually
reset.
Max harvest time - 3 minutes
If the harvest cycle has continued for 3 minutes
without the curtain opening, the controller will
shut the machine off for 50 minutes and then
restart. If there is another the machine will shut
the machine off for another 50 minutes and then
restart. If it fails a third consecutive time the
controller will shut the machine down and must
be manually reset.
• Time between resets - 50 minutes
• Number of automatic resets - 2
• Max water fill time - 5 minutes. Machine will
attempt a restart every 20 minutes.
• Max discharge temp - 120°C (250 degrees F).
• Time interval between cleanings - 6 months
power on time - adjustable in one month
increments, can be set at 6, 5, 4 or 3 months of
power up time.
• Manual harvest time - 3 minutes
• Minimum compressor off time - 4 minutes
• Continuous Run Time Maximum Cycles - 25
RESTARTS
Power Interruption
The controller will automatically restart the ice
machine after adequate voltage has been
restored.
• H blinks on code display
• Status indicator light blinks
• Reservoir is drained and refilled
• Default harvest is initiated. The curtain switch
does not have to open to terminate harvest,
harvest will continue until either the curtain’s
switchopensorthedefaultharvesttimeexpires.
Default harvest time is 2 and half minutes. The
machine will then return to a normal freeze
cycle.
Water Interruption
• The controller will attempt to fill the reservoir
every twenty minutes until it is successful.
On-Off Switch Access
AllmodelsshipwiththeOnandOffswitchesfront
accessible.

Page 20
Page 20
CONTROL BUTTON USE (from standby)
Setpurgelevel,1-5(1isminimum,5ismaximum)
or Automatic:
• Hold off button in till a number or the letter A
shows on display and green STATUS led
ON. . Release.
• PressandreleasetheOnbuttontocyclethrough
and select one of the five purge settings (1->5)
or to use the Automatic setting (A).
Recall diagnostic code:
• Hold off button in till a number or the letter A
shows on display and green STATUS led
ON. . Release.
• Press and release the Harvest button to cycle
through each of the last 10 error codes from
most recent to oldest.
Clear diagnostic code:
•HoldCleanandHarvestbuttonsinfor3seconds
to clear all prior codes.
Reset control:
• Depress and release Off, then depress
andrelease On.
Start Test Mode:
• Hold off button in till a number or the letter A
shows on display and green STATUS led
ON. . Release.
• Hold Clean button in till letter d shows on
display. Release.
Lock / Unlock control:
• Hold On button in for 3 seconds, keep holding
then press and release Off twice.
Empty reservoir:
• Hold Clean button in till dash (-) shows on
display.Release.Pumpandpurgevalvewillbe
ON for 30 seconds. Repeat as needed.
Test Mode: See next page for Air and Water
Cooled mode.
• Hold off button in till a number or the letter A
shows on display and green STATUS led ON,
release. Then depress Clean for 3 seconds till
letter d shows on display.
•Thesumpwillfillthefirst30seconds of the test.
If the sump is full it will overflow into the bin. At
30secondstheWIVwillshutoffandtheWPwill
turn on. You will be able to see and hear the
water running over the plate. After 10 seconds
the PV and HGV will turn on. Water will be
purging from the machine. After 10 more
seconds the compressor will start. 5 seconds
later the HGV will close. The compressor will
run for a total of 20 seconds. After which
everything will turn off for 5 seconds. After that
time the HGV will open and you’ll be able to
hear the hissing as the pressure is equalized.
10 seconds later the fan will turn on (if air
cooled). After 10 seconds all will be off and the
output test will be complete.
Change De-Scale Notification Interval
Like the others, this feature is accessible only
from standby (Status Light Off).
• Press and hold harvest button till a number
shows on display.
• This will allow control to enter Time to Clean
Adjustment State.
• Display current time to clean months on 7
segment display.
• Pressing clean button repeatedly will cycle
through one of 4 possible settings:
6 months (4380 hours) (default)
5 months (3650 hrs)
4 months (2920 hrs)
3 months (2190 hrs)
Time (seconds) On Off
0 WIV -30 seconds WP, HGV, Comp, Fan, PV
30 WP -10 seconds WIV, HGV, Comp, Fan, PV
40 WP, PV, HGV -10 seconds WIV, Comp, Fan
50 HGV, Comp -5 seconds WIV, WP, Fan, PV
55 Comp -15 seconds WIV, HGV, WP, Fan, PV
70 None -5 seconds All
75 HGV -10 seconds WIV, WP, Comp, Fan, PV
85 Fan -10 seconds WIV, HGV, WP, Comp, PV
95 None All - Test Complete
Test Mode Sequence Table - Air or Water Cooled