Scotsman Prodigy Elite MC0322 User manual

Service Manual for
Air, Water, and Remote Cooled Modular Cuber
Prodigy Elite® Models MC0322, MC0522,
MC0722, MC0330, MC0530, MC0630, MC0830,
MC1030, MC1448, MC1848, MC2148

January 2022
Page 2
MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
Introduction
This technical manual covers the Prodigy line, excluding the Eclipse remote low side models. All are shipped
with an Installation and User's manual, which can be referred to separately. General installation information is
included in this manual.
Contents
Model Number Description ................ Page 3
Water ................................. Page 4
General Installation - Air or Water Cooled ..... Page 5
General Installation - Air or Water Cooled ..... Page 6
Adjustments............................ Page 7
Water purge setting ...................... Page 8
General Installation - Remote .............. Page 9
General Installation - Remote .............. Page 10
General Installation - Remote .............. Page 11
General Installation - Remote .............. Page 12
General Installation - Remote .............. Page 13
Prodigy Cuber System Information .......... Page 14
Controller Information .................... Page 15
Component Indicator Lights. . . . . . . . . . . . . . . . Page 16
How It Works - Air Cooled ................. Page 17
How It Works - Water Cooled .............. Page 18
How It Works - Remote ................... Page 19
Electrical Sequence - Air or Water Cooled .... Page 20
Electrical Sequence - Remote Cooled. . . . . . . . Page 21
Remote Schematics ..................... Page 22
Electrical Component Details .............. Page 23
Electrical Component Details .............. Page 25
Refrigeration ........................... Page 26
Water System .......................... Page 27
Control Operation ....................... Page 28
Control Safeties......................... Page 29
Control Button Use (from standby) .......... Page 30
Control Button Use - continued ............. Page 31
Thermistor Values ....................... Page 32
Cleaning .............................. Page 33
Critical Maintenance - Water Level Sensor .... Page 34
Critical Maintenance - Ice Thickness Sensor .. Page 35
Critical Maintenance - Spillway ............. Page 36
Diagnostics – Air Cooled .................. Page 37
Diagnostics - Air Cooled .................. Page 38
Low Ice Making Capacity - Air Cooled........ Page 39
Diagnostics – Water Cooled ............... Page 40
Diagnostics - Water Cooled................ Page 41
Low Ice Making Capacity - Water Cooled ..... Page 42
Diagnostics – Remote Air Cooled ........... Page 43
Diagnostics - Remote Air Cooled. . . . . . . . . . . . Page 44
Low Ice Making Capacity - Remote Air Cooled . Page 45
Test Procedures - Sensors ................ Page 46
Ice Thickness Sensor .................... Page 47
Water Level Sensor ...................... Page 48
Temperature Sensors .................... Page 49
Test Procedures - Compressor ........... Page 50
Test Procedures - Fan motor ............. Page 51
Test Procedures - Water Pump ........... Page 52
Test Procedure - Purge valve............. Page 53
Test Procedure - Compressor contactor ...... Page 54
Test Procedures - Pressure switches ........ Page 55
Test Procedures - Liquid Line Solenoid ....... Page 56
Test Procedure - Inlet Water Solenoid Valve ... Page 57
Test Procedure - Harvest Assist ............ Page 58
Repair Section.......................... Page 59
Repair Section.......................... Page 60
Repair Section.......................... Page 61
Repair Section.......................... Page 62
Repair Section.......................... Page 63
Repair Section.......................... Page 64
Repair Section.......................... Page 65
Repair Section.......................... Page 66
Refrigeration Removal and Replacement ..... Page 67
Refrigeration Removal and Replacement ..... Page 68
Refrigeration Removal and Replacement ..... Page 69
Optional add-on control information - KVS .... Page 70
Performance Data ...................... Page 71
Performance Data ...................... Page 72
Performance Data ...................... Page 73
Performance Data ...................... Page 74
Performance Data ...................... Page 75
Performance Data ...................... Page 76
Performance Data ...................... Page 77
Wiring Diagrams ........................ Page 78
Wiring Diagrams ........................ Page 79

MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
January 2022
Page 3
Model Number Description
Example:
• MC0322SA-1A
• MC= modular cuber
• 03= nominal ice capacity in 100s of pounds
• 22= nominal width of cabinet
• S= Cube size. S=small or half dice cube. M=medium or full dice cube
• A=Condenser type. A=air cooled. W=water cooled
• -1=115 60 Hz, -32=208-230 60 Hz, -3= 208-230 3 phase 60 Hz
• A=Series revision code.
Note: In some areas of this manual model numbers may include only the rst ve characters of the
model number, meaning that the cube size, condenser type and voltage di󰀨erences are not critical to
the information listed there.
Scotsman reserves the right to make design changes and/or improvements at any time. Specications and
design are subject to change without notice.
Wiring Diagrams ........................ Page 80
Wiring Diagrams ........................ Page 81
Wiring Diagrams ........................ Page 82
Wiring Diagrams ........................ Page 83
Wiring Diagrams ........................ Page 84
Wiring Diagrams ........................ Page 85
Wiring Diagrams ........................ Page 86
Wiring Diagrams ........................ Page 87
Wiring Diagrams ........................ Page 88
Wiring Diagrams ........................ Page 89
Wiring Diagrams ........................ Page 90
Wiring Diagrams ........................ Page 91
Wiring Diagrams ........................ Page 92
Wiring Diagrams ........................ Page 93
Wiring Diagrams ........................ Page 94
Wiring Diagrams ........................ Page 95
Wiring Diagrams ........................ Page 96
Wiring Diagrams ........................ Page 97
Wiring Diagrams ........................ Page 98
Wiring Diagrams ........................ Page 99
Wiring Diagrams ........................ Page 100
Wiring Diagrams ........................ Page 101
Wiring Diagrams ........................ Page 102
Wiring Diagrams ........................ Page 103
Wiring Diagrams ........................ Page 104
Wiring Diagrams ........................ Page 105
Wiring Diagrams ........................ Page 106
Wiring Diagrams ........................ Page 107
Wiring Diagrams ........................ Page 108
Wiring Diagrams ........................ Page 109

January 2022
Page 4
MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
Water
The quality of the water supplied to the ice machine will have an impact on the time between cleanings and
ultimately on the life of the product. There are two ways water can contain impurities: in suspension or in
solution. Suspended solids can be ltered out. In solution or dissolved solids cannot be ltered, they must be
diluted or treated. Water lters are recommended to remove suspended solids. Some lters 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
Installing an ice machine near a source of yeast or similar material can result in the need for more frequent
sanitation cleanings due to the tendency of these materials to contaminate the machine. Most water lters
remove chlorine from the water supply to the machine which contributes to this situation. Testing has shown
that using a lter that does not remove chlorine, such as the Scotsman Aqua Patrol, will greatly improve this
situation, while the ice making process itself will remove the chlorine from the ice, resulting in no taste or odor
impact.
Additionally, devices intended to enhance ice machine sanitation, such as the Scotsman Aqua Bullet, can be
placed in the machine 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 used during ice
making, a portion is designed to be drained out every cycle to reduce the amount of hard water scale in the
machine. That’s known as water purge, and an e󰀨ective purge can increase the time between needed water
system cleaning.
In addition, this product has the capability to automatically vary the amount of water purged based on the purity
of the water supplied to it. The water purge rate can also be set manually. Adjustments of purge due to local
water conditions are not covered by warranty.

MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
January 2022
Page 5
General Installation - Air or Water Cooled
Location Limitations:
The product is designed to be installed indoors, in a controlled environment. Air cooled models discharge
very warm air into the room out the back. Space must be allowed at the left side and back for air intake and
discharge. Water cooled models discharge warm water into the building’s drain. Space needs to be provided
on both sides and above for service access.
Space Limitations
Note: Although the machine will function, ice capacity of air cooled machines will be signicantly
reduced with minimal clearance at the sides, back and top. Some space is recommended for service
and maintenance purposes on all models.
6" of space at the sides and back is required for adequate operation. To get the most capacity, locate the
machine away from heat producing appliances and heating ducts.
22 and 30 inch: Airow is in the front, out the back
48 inch wide models: Air ow is in the front and left side and out the back.
Environmental Limitations
Minimum Maximum
Air temperature 50oF. 100oF.
Water temperature 40oF. 100oF.
Water pressure 20 psi 80 psi
Power supply – acceptable voltage ranges
Minimum Maximum
115 volt model 104 volts 126 volts
208-230 volt model 198 volts 253 volts
Warranty Information
The warranty statement for this product is provided 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 circumstances that exceed the
limitations printed above

January 2022
Page 6
MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
General Installation - Air or Water Cooled
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 3/8” FPT inlet water connection.
Water cooled models have the same inlet tting plus an additional 3/8” FPT condenser inlet water connection.
Water Filters
If connecting to water ltration, lter only the water to the reservoir, not to the condenser. Install a new cartridge
if the lters were used with a prior machine.
All models require drain tubing to be attached to them. Air cooled models have a single ¾” FPT drain tting in
the back of the cabinet. Water cooled models have the same tting plus an additional ½” FPT drain tting in the
back of the cabinet.
Install new tubing when replacing a prior ice machine, as the tubing will have been sized for the old model and
might not be correct for this one.
Note: This NSF listed model has a 1" anti-back ow air gap between the water inlet tube end and the
highest possible reservoir water level, no back ow device is required for the potable water inlet.
Drain Tubing:
Use rigid drain tubes and route them separately – do not Tee into the bin’s drain and, if water cooled, do not
Tee the condenser drain into the reservoir or bin drain.
Vent the reservoir drain. A vertical vent at the back of the drain, extended about 8 – 10” will allow the gravity
drain to empty and also keep any surges during draining from discharging water out the vent..
Horizontal runs of drain tubing need a ¼” fall per foot of run for proper draining. Follow all applicable codes.
Electrical
See the spec sheet or User’s Manual for Minimum Circuit Ampacity or Maximum Fuse Size ratings.
The machine is not supplied with a power cord, one must either be eld installed or the machine hard-wired.
The dataplate on the back of the cabinet details the power requirements, including voltage, phase, minimum
circuit ampacity and maximum fuse size. HACR type circuit breakers may be used in place of fuses. Extension
cords are not permitted. Use of a licensed electrician is recommended.
Electrical connections are made inside the junction box in the back panel of the ice machine.
Follow all applicable local, state and national codes.

MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
January 2022
Page 7
Adjustments
Ice Bridge Thickness
Caution: Do not make the bridge too thin or the machine will not harvest properly. Bridge thickness adjustments
are not covered by warranty.
Shut machine o󰀨.
Access the ice thickness sensor.
Check gap between metal tip and evaporator grid. Standard gap is 7/32 inch. To set 7/32" drill bit between
sensor tip and evaporator to check. Adjust gap using adjustment screw.
Restart unit and check ice bridge. Repeat as needed.
1/8 to 3/16
inch bridge
Too Thin
Too Thick Correct Correct
Small Medium
Adjustment Screw

January 2022
Page 8
MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
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.
purge setting 1 - Minimum 2 - Moderate 3 - Standard 4 - Heavy 5 - Maximum A - Automatic
Water Type RO water or
equivalent,
TDS less than
35
Low TDS non
- RO water
Setting for
typical water
High TDS
water
Very high
TDS water,
greater than
256
Any with
conductivity not
less than 10
microSiemens/
cm
To set:
Switch the machine OFF by holding the O󰀨 button in until a number or the letter A shows on the display.
Press and release the On button repeatedly until the number on the display corresponds to the desired setting.
Press and release the O󰀨 switch again to return to the normal control state.
Product Description and Electrical Requirements
See user's manual, dataplate, or spec sheet for Minimum Circuit Ampacity or Maximum Fuse Size
Ratings include the remote condenser motor, as it is designed to be powered by the ice machine. If connecting
remote condenser independently of the ice machine, use the information on the condenser's dataplate for fuse
and wire sizes.

MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
January 2022
Page 9
General Installation - Remote
Location Limitations
This ice system is made up of three parts, the ice making machine, or head; the remote condenser; and the
interconnecting tubing. The ice making machine must be installed indoors, in a controlled environment. Space
must be provided near the machine for service access. The remote condenser may be installed above or below
the ice machine, per the limits stated later in this manual. The remote condenser may be installed outdoors
within the temperature limits listed below. The interconnecting tubing must be installed per the directions stated
in this manual, and the amount of tubing exposed to uncontrolled temperatures must be minimized.
Space Limitations
Although the machine will function with no clearance to the top and sides, some space must be allowed for
service access. Building the machine in with no access will cause higher service cost, in many cases this extra
cost may not be covered by warranty.
Environmental Limitations, ice machine:
Minimum Maximum
Air temperature 50oF. 100oF.
Water temperature 40oF. 100oF.
Water Pressure 20 psi 80 psi
Environmental Limitations, remote condenser
Minimum Maximum
Air temperature -20oF. 120oF.
Power Supply
Minimum Maximum
115 volt model 104 volts 126 volts
208-230 volt model 198 volts 253 volts
Central Condenser Coils
The ice machine may be connected to a central condenser coil. The requirements are:
• Coil – not previously used with mineral oil system. Virgin coil preferred.
• Correct size (internal volume) and capacity (BTUH).
• Includes a headmaster valve for discharge pressure control. Headmaster kit available for certain MAC
condensers, kit number is RCKCME6GX-E.
• Fan motor on all the time or controlled to be on whenever the ice machine is operating.
• Non-Scotsman condensers must have prior Scotsman Engineering approval for warranty coverage to be in
e󰀨ect.
Precharged tubing kits:
The ice making head’s and the remote condenser’s refrigeration circuits must be connected. They are
designed to be connected using precharged refrigerant tubing, supplied in kits of liquid and discharge tubes.
Several lengths are available, order the one that just exceeds the length needed for the site.
10” 25’ 40’ 75’
BRTE10 BRTE25 BRTE40 BRTE75
No additional refrigerant is required. Note: Refrigerant charge is supplied with the ice machine

January 2022
Page 10
MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
General Installation - Remote
Remote Condenser Location
Use the following for planning the placement of the condenser relative to the ice machine - see illustration on
the following page.
Location Limits - condenser location must not exceed ANY of the following limits:
• Maximum rise from the ice machine to the condenser is 35 physical feet
• Maximum drop from the ice machine to the condenser is 15 physical feet
• Physical line set maximum length is 100 feet.
• Calculated line set length maximum is 150.
Calculation Formula:
• Drop = dd x 6.6 (dd = distance in feet)
• Rise = rd x 1.7 (rd = distance in feet)
• Horizontal Run = hd x 1 (hd = distance in feet)
• Calculation: Drop(s) + Rise(s) + Horizontal Run = dd+rd+hd = Calculated Line Length
Congurations that do NOT meet these requirements must receive prior written authorization from Scotsman.
Do NOT:
• Route a line set that rises, then falls, then rises.
• Route a line set that falls, then rises, then falls.
Calculation Example 1:
The condenser is to be located 5 feet below the ice machine and then 20 feet away horizontally.
5 feet x 6.6 = 33. 33 + 20 = 53. This location would be acceptable
Calculation Example 2:
The condenser is to be located 35 feet above and then 100 feet away horizontally. 35 x 1.7 = 59.5. 59.5 +100 =
159.5. 159.5 is greater than the 150 maximum and is NOT acceptable.
Operating a machine with an unacceptable conguration is misuse and will void the warranty.

MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
January 2022
Page 11
General Installation - Remote
For The Installer: Remote Condenser
Locate the condenser as near as possible to the interior location of the ice machine.
Note: The location of the condenser is relative to the ice machine is LIMITED by the specication on
the prior page.
Meet all applicable building codes.
Roof Attachment
Install and attach the remote condenser to the roof of the building, using the methods and practices of
construction that conform to the local building codes, including having a roong contractor secure the
condenser to the roof.
22.87"
17.15"
40.35"
dd
hd
rd
Remote Condenser Located
Above Ice Machine
Remote Condenser Located
Below Ice Machine
Condenser Distance and Location Schmatic
Max 35’
Max 15’

January 2022
Page 12
MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
General Installation - Remote
Do not connect the refrigerant tubing until all routing and forming of the tubing is complete. Final connections
requires brazing, steps must be performed by an EPA certied type II or higher technician. The Lineset of
tubing contains a 3/8” diameter liquid line, and a 1/2” diameter discharge line.
Note: The openings in the building ceiling or wall, listed in the next step, are the minimum sizes
recommended for passing the refrigerant lines through.
2. Have the roong contractor cut a minimum hole for the refrigerant lines of 1 3/4”. Check local codes, a
separate hole may be required for the electrical power supply to the condenser.
Caution: Do NOT kink the refrigerant tubing while routing it.
At Condenser:
1. Remove protective plugs from both connections and vent the nitrogen from the condenser.
2. Remove the tubing access bracket to allow more room for brazing.
3. Route the lineset tubes to there connection.
4. Clean tubing ends and position into stubs.
Note: Be sure tube and stubs are round, dress with swage tool if needed.
At Head:
1. Remove the tubing access bracket to allow more room for brazing.
1. Conrm connection ball valves are fully closed.
2. Remove protective plugs from both connections.
3. Remove caps from access valve connections.
4. Remove cores from access valves.
5. Connect refrigeration hoses to access valves.
6. Connect dry nitrogen source to liquid line connection.
7. Shorten tubing to correct length, clean ends and insert them into valve stubs.
Note: Be sure tube and stubs are round, dress with swage tool if needed.
8. Add heat sink material to ball valve body.
9. Open nitrogen and ow 1 psi nitrogen into liquid line tube and braze the liquid line and suction line tubes to
the valve stubs.
10. With nitrogen owing braze the liquid and suction line connections.
At Condenser:
1. Braze the liquid and suction line connections.
At Head:
1. Remove nitrogen source.
2. Return valve cores to access valves.
3. Connect vacuum pump to both access valves and evacuate tubing and head to at least a 300 micron level.
4. Remove vacuum pump and add R-404A to both tubes to provide a positive pressure.
5. Leak check the all braze connections and repair any leaks.
6. Locate king valve o󰀨 receiver, located near the back wall of most models. Fully open king valve.
7. Open both ball valves, making sure they’re fully open.
Note: The full refrigerant charge is contained in the receiver of the ice machine.

MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
January 2022
Page 13
General Installation - Remote
Plumbing Requirements
All models require connection to cold, potable water. A hand actuated valve within site of the machine is
required.
Water Filters
Install a new cartridge if the lters were used with a prior machine.
All models require drain tubing to be attached to them. There is a single ¾” FPT drain tting in the back of the
cabinet.
Install new tubing when replacing a prior ice machine, as the tubing will have been sized for the old model and
might not be correct for this one.
Connect water supply to water inlet tting.
Note: This NSF listed model has a 1" anti-back ow air gap between the potable water inlet tube end
and the highest possible reservoir water level, no back ow device is required.
Connect drain tubing to drain tting.
Route the drain tubing to building drain. Follow local codes for drain air gap.
Use rigid drain tubes and route them separately – do not Tee into the bin’s drain.
Vent the reservoir drain. A vertical vent at the back of the drain, extended about 8 – 10” will allow the gravity
drain to empty and also keep any surges during draining from discharging water.
Horizontal runs of drain tubing need a ¼” per fall per foot of run for proper draining.
Follow all applicable codes.
Electrical
The machine is not supplied with a power cord, one must either be eld installed or the machine hard-wired.
The dataplate on the back of the cabinet details the power requirements, including voltage, phase, minimum
circuit ampacity and maximum fuse size. HACR type circuit breakers may be used in place of fuses. Extension
cords are not permitted. Use of a licensed electrician is recommended.
The ice maker is designed to operate on its own electrical circuit and must be individually fused. Voltage
variation must not exceed the limits listed earlier.
The remote condenser is designed to be powered from the ice machine. A separate knockout hole has been
provided in the ice maker electrical junction box.
Electrical connections are made inside the junction box in the back panel of the ice machine.
Remove the junction box cover and route the power cord through the access hole and properly attach the
power supply wires to the leads in the junction box.
Attach the remote condenser fan motor wires to the wires in the junction box tagged “fan motor leads”.
Install eld supplied strain reliefs per code. Attach a ground wire to the ground connection in the junction box.
Check voltage when complete.
Return the junction box cover to its original position and secure with the original screws.
Follow all applicable local, state and national codes.

January 2022
Page 14
MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
Prodigy Cuber System Information
Overall System Type:
• Refrigeration: Mechanical, either air cooled, water cooled or remote cooled.
• Water System: Inlet water solenoid valve lls 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: Unied
• Harvest system: Hot gas defrost with mechanical 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 – certain AC models only
• Harvest Assist Solenoid(s)
• Hot Gas Valve(s)
• Controller
• Transformer – 12v AC for the controller only
• Water Level Sensor
• Ice Thickness Sensor
• Curtain Switch(es)

MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
January 2022
Page 15
Controller Information
Machine Indicator Lights
• Power
• Status
• Water
• Clean
• Bin Full (on lower light and switch panel)
Code Display
Main codes - automatically displayed
F. . . . . . . Freeze Cycle
F ashes . . Freeze Cycle is Pending
H. . . . . . . Harvest Cycle
H ashes . . Manual Harvest
B. . . . . . . Bin is Full
C. . . . . . . Clean Cycle
P. . . . . . . Preservation Mode
T. . . . . . . Test Mode
O . . . . . . . O󰀨
d. . . . . . . Drain Sump
E. . . . . . . Self Test Failed
1 ashes . . Max Freeze - Retrying
1. . . . . . . Max Freeze Time Shut Down
2 ashes . . 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 ashes . . Short Freeze - Retrying
8. . . . . . . Short Freeze - Thin ice
Setting Codes - requires push button sequence
Water Purge Settings
A, 1, 2, 3, 4, 5
De-Scale notication
- see table to the right
Change De-Scale Notication Interval -
This feature is accessible only from standby (Status
Light O󰀨).
1. Press and hold harvest button for 3 seconds.
This starts the Time to Clean Adjustment Mode and
displays the current time to clean setting.
2. Press the clean button repeatedly to cycle through
the 4 settings:
1year
0or disabled
4months
6months (default)
3. Push O󰀨 to conrm the selection.
POWER STATUS WATER CLEAN
ICE PRODUCTION
MANUAL
HARVEST INITIATE CLEAN
OPTIONAL KVS PLACED HERE
(Vari-SmartTM Adjustable Ice Level Control)
The following codes will be displayed when
unit is operating as expected:
F- Freeze
H- Harvest
B- Bin Full
O- Standby/Off
Additional operational and error codes can
be found on the inside of the front panel.
Scan QR code to download the Scotsman ICELINQ™ App:
Connect to this machine via Bluetooth to access additional machine operations,
view error information, adjust settings, and initiate self-guided cleaning.
ON OFF
02-5166-01
OPTIONAL KSBU, KPAS, KSBU-N PLACED HERE
(Smart-Board™ Advanced Control Panel)
Component Operation Indicator Lights

January 2022
Page 16
MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
Component Indicator Lights
• Condenser Fan / Aux (Aux = liquid line solenoid when a remote condenser model)
• Water Pump
• Purge Valve
• Water Solenoid
• Hot Gas
• Compressor
• Ready to Harvest
• Sump Empty
• Sump Full
• Curtain SW1
• Curtain SW2

MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
January 2022
Page 17
How It Works - Air Cooled
Freeze Cycle. At start up the controller drains and rells the reservoir. The reservoir rells when the mid length
water level sensor probe is uncovered and continues to ll until the top probe is in contact with water. When the
reservoir has lled, the compressor and water pump start. After the discharge pressure has increased past the
cut in point of the fan pressure control, the fan motor(s) will begin to operate and warm air will be discharged
out the back of the cabinet. The fan motor will switch on and o󰀨 as the discharge pressure rises and falls.
Water ows 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 o󰀨 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 owing over the ice moves closer and closer to the metal tip of the ice
thickness sensor. 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 o󰀨 for a variable period of time to build up heat for harvest.
This is dependant upon the temperature of the discharge line sensor.
Harvest Cycle. When the harvest cycle begins, the controller shuts o󰀨 the fan motor, switches on the hot
gas valve, 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 switched o󰀨 at a time determined to have drained enough water for that
setting. The inlet water valve will open to ll the reservoir anytime the mid length probe is uncovered, which
occurs during the reservoir drain cycle. Harvest continues as the hot discharge gas ows into the evaporator
serpentine, heating up the evaporator. 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 some additional force to push it o󰀨. When the ice falls o󰀨 it will force the curtain(s) open. An
open curtain during the harvest cycle signals the controller that the evaporator has released its ice. If this is a
single evaporator machine the controller will terminate harvest. If it is a two evaporator machine, the controller
will continue harvest until both curtains have opened. If one curtain remains open, the controller will shut the
machine down on bin full. Anytime harvest is complete the hot gas valve and harvest assist are shut o󰀨. The
harvest assist pin returns to its normal position by spring pressure.
If the curtain(s) re-close after harvest, the freeze cycle will restart.

January 2022
Page 18
MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
How It Works - Water Cooled
Freeze Cycle. At start up the controller drains and rells the reservoir. The reservoir rells when the mid length
water level sensor probe is uncovered and continues to ll until the top probe is in contact with water. When the
reservoir has lled, the compressor and water pump start. After the discharge pressure has increased past the
set point of the water regulating valve, the water regulating valve will open and warm water will be discharged
out the condenser drain. The water regulating valve will modulate to maintain a relatively constant discharge
pressure. Water ows 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 o󰀨 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 owing over the ice moves closer and closer to the metal tip of the ice
thickness sensor. When it comes into contact with the sensor for a few continuous seconds, that signals the
controller that the freeze cycle is complete.
Harvest Cycle. When the harvest cycle begins, the controller switches on the hot gas valve, 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 switched o󰀨 at a time determined to have drained enough water for that setting. The inlet water valve
will open to ll the reservoir anytime the mid length probe is uncovered, which occurs during the reservoir drain
cycle.
Harvest continues as the hot discharge gas ows into the evaporator serpentine, heating up the evaporator. 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 some additional force to push
it o󰀨. When the ice falls o󰀨 it will force the curtain(s) open. An open curtain during the harvest cycle signals
the controller that the evaporator has released its ice. If this is a single evaporator machine the controller will
terminate harvest. If it is a two evaporator machine, the controller will continue harvest until both curtains have
opened. If a curtain remains open, the controller will shut the machine down on bin full. Anytime harvest is
complete the hot gas valve and harvest assist are shut o󰀨. The harvest assist pin returns to its normal position
by spring pressure.
If the curtain(s) re-close after harvest, the freeze cycle will restart.

MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
January 2022
Page 19
How It Works - Remote
Freeze Cycle. At start up the controller drains and rells the reservoir. The reservoir rells when the mid length
water level sensor probe is uncovered and continues to ll until the top probe is in contact with water. When
the reservoir has lled, the liquid line valve, compressor and water pump are switched on. After the discharge
pressure has increased past the set point of the headmaster in the condenser, the headmaster will direct
refrigerant gas into the condenser and warm air will be discharged out of the condenser. The headmaster will
modulate to maintain a minimum discharge pressure. Water ows 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 o󰀨 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 owing over the ice moves
closer and closer to the metal tip of the ice thickness sensor. When it comes into contact with the sensor for a
few continuous seconds, that signals the controller that the freeze cycle is complete.
Harvest Cycle. When the harvest cycle begins, the controller switches on the hot gas valve, 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 switched o󰀨 at a time determined to have drained enough water for that setting. The inlet water valve
will open to ll the reservoir anytime the mid length probe is uncovered, which occurs during the reservoir drain
cycle.
Harvest continues as the hot discharge gas ows into the evaporator serpentine, heating up the evaporator. 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 some additional force to push
it o󰀨. When the ice falls o󰀨 it will force the curtain(s) open. An open curtain during the harvest cycle signals
the controller that the evaporator has released its ice. If this is a single evaporator machine the controller will
terminate harvest. If it is a two evaporator machine, the controller will continue harvest until both curtains have
opened. If a curtain remains open, the controller will shut the machine down. Anytime harvest is complete the
hot gas valve and harvest assist are shut o󰀨.
The harvest assist pin returns to its normal position by spring pressure.
If the curtain(s) re-close after harvest, the freeze cycle will restart.
Shut down occurs when a curtain remains open after a harvest cycle. The controller will switch o󰀨 the liquid
line solenoid valve and operate the compressor for 30 seconds, then shut it o󰀨.

January 2022
Page 20
MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
Electrical Sequence - Air or Water Cooled
Power connected, unit previously switched O󰀨.
Control board does a self check. If the self check fails, the unit displays an E and no further action will occur.
If the self check passes, the controller will display a 0, the curtain light(s) 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.
The display will begin to blink F. The component indicator lights will switch on and o󰀨 to match the following
process:
The purge valve opens and the water pump starts to empty the reservoir. This is done to discharge any excess
water from ice melting into the reservoir.
The hot gas valve and the harvest assist solenoid are energized.
The inlet water valve will open to ll the reservoir. The water valve can open any time the water level is low.
After a few seconds the purge valve closes and the pump shuts o󰀨.
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-blinking F. The Power and Status Lights will be Green. The
compressor, fan motor, water pump, sump full and one or two curtain switch lights will be ON.
The air cooled model's fan motor will start to turn 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 o󰀨 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 out and neither
sump lights will be on for the rest of the freeze cycle.
When the ice has built up enough so that the water owing over the evaporator comes into continuous contact
with the ice level sensor, the Ready to Harvest light will begin to blink on and o󰀨. When it has been On
continuously for 5 seconds, the controller will switch the machine into a Harvest cycle.
Indicator Information: The display shows a non-blinking H. The Power and Status Lights will be Green. The
compressor, hot gas valve and one or two 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 o󰀨 and remain o󰀨 throughout the harvest cycle.
The harvest assist solenoid is connected in parallel with the hot gas valve. Although it is energized throughout
the harvest cycle, its piston does not move until the ice has become partially loosened from the evaporator
plate by the action of the hot refrigerant gas passing through the evaporator serpentine.
The water pump and purge valve will shut o󰀨 when the purge level setting time has been reached, either the
manual time or the automatic time. The inlet water valve will remain on until it lls the reservoir. The Ready to
Harvest light will switch O󰀨 when the ice falls from the evaporator.
Harvest continues until the ice slab is ejected from the evaporator and falls, opening the curtain. When the
curtain opens, the magnetic reed curtain switch opens, breaking the circuit to the controller. If the curtain re-
closes within 30 seconds, the controller switches the machine back into another freeze cycle. If the curtain
switch remains open, the controller shuts the machine down and puts it into a standby position.