Scotsman CS0415 Service Manual
Service Manual for
Cuber Model CS0415
Introduction
CS0415
Service Manual
This is the service manual for the CS0415 ice
machine.
Basic installation information is provided, however
the installation manual is separate.
Note and heed any warning symbols where they
appear.
Table of Contents
Specifications .......................................... Page 3
Installation: ........................................... Page 4
Test Mode - Ice Thickness Adjustment ............................. Page 5
Technical Charts: ........................................ Page 6
Operational Modes: ....................................... Page 7
Harvest Mode .......................................... Page 8
Component Location ...................................... Page 9
Component Location ...................................... Page 10
Diagnostic Mode ........................................ Page 11
Error Displays .......................................... Page 12
Component Testing ....................................... Page 13
Component Testing ....................................... Page 14
Flow Chart - Overall Operation ................................. Page 15
Flow Chart - Freeze Mode Details ............................... Page 16
Service Diagnosis ........................................ Page 17
Service Diagnosis ........................................ Page 18
Removal and Replacement - Thermistor ............................ Page 19
Removal and Replacement ................................... Page 20
Removal and Replacement - Controller ............................. Page 21
Removal and Replacement ................................... Page 22
Removal and Replacement - Evaporator ............................ Page 23
July 2007
Page 2
Specifications
CS0415
Service Manual
Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of agencies like NSF and UL..
Scotsman assumes no liability or responsibility of
any kind for products manufactured by Scotsman
hat have been altered in any way, including the use
of any part and/or other components not
specifically approved by Scotsman.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and design are subject to change
without notice.
AC Power Supply:
104 to 127 VAC (rated 115 VAC), 60 Hz
•
Amperage:
6.5 Amps (max)
•
Storage Capacity (Approximate)
24 lbs. (10.9 kg)
•
Exterior Dimensions (WxDxH)
15" x 24" x 34" (381 or 457.2 x 609.6 x 863.6
•
mm)
Exterior Finish:
Painted Steel
•
Net Weight:
94 lb. (42.6 kg)
•
Cube Thickness Control:
Thermistor under Evaporator & Control
•
Board Setting
Harvest Control:
Minimum Circuit Capacity:
•
15 Amps
Ice Production per 24 hours (Approximate)
•
70oF (27oC) 46 lbs (21 kg)
•
80oF (27oC) 47 lbs (21 kg)
•
90oF (32oC) 40 lbs (18 kg)
•
100oF (38oC) 40 lbs (18 kg)
Ice Shape:
•
3/4" x 3/4" Square
Ice Thickness @ Normal Setting (Approximate)
•
0.32" or 5/16" (8.1 mm)
Ice Thickness @ Thin Setting (Approximate)
•
0.28" or 9/32" (7.0 mm)
Ice Thickness @ Thick Setting (Approximate)
•
Thermistor under Evaporator & Control
Board Setting
Bin Ice Level Control:
•
Thermistor on side of Bin
Refrigerant:
•
R-134a (6.2 oz). Weigh into high side only.
Ambient Temperature Operation Range:
•
55 to 100
Water Pressure Operating Range
•
20 to 120 psig
Water Consumption (Dependent On Water
Pressure)
•
6 to 10 gallons per 4 hours
o
F
•
0.39" or 3/8" (9.9 mm)
July 2007
Page 3
Installation:
The ice machine is designed to be installed
indoors, in a controlled environment. Do not place
where the temperature limits for air or water are
exceeded.
The water supply must be cold, potable water. A
drain must be nearby or a drain pump model used
or a gravity drain model must be converted to use a
drain pump.
The ice machine must be on its own electrical
power circuit. The machine must be grounded. Do
not connect to an extension cord. Do not cut off the
ground prong off the power cord plug. Do not
bypass the ground prong.
The cabinet is designed to be either free standing
or built in. In either case the area in front of the
kickplate must be free of obstruction. Blocking this
area will cause low ice capacity and likely damage
the machine. Such damage is considered mis-use
and is not covered by warranty.
CS0415
Service Manual
When building into a cabinet, be sure the power
supply, water and drain are all available within the
built in area.
Drain Hose*
Vent Hose*
Water Inlet
Back View
July 2007
Page 4
* Drain Pump Models
Test Mode - Ice Thickness Adjustment
CS0415
Service Manual
The CS0415 has three push button switches: ON,
OFF and CLEAN. These can be used to switch the
machine on, off and to start the cleaning process.
They can also be used to test the unit's
components.
To test and/or to adjust ice thickness:
1. Unplug or disconnect the unit from the power
supply.
Note: Unit must be On (make ice mode) when
power is disconnected.
2. Reconnect power to the unit.
3. Immediately, within ten seconds of power
re-connection, push and hold the On and Clean
buttons until the three indicator lights begin to blink.
4. Push and release the Off button to cycle through
testing the various components.
Test 9, no component tested.
Test 10, displaying the ice thickness setting.
Ice Thickness Adjustment.
The Off light is the indicator.
If it blinks 2 times and repeats, the ice
•
thickness is set at thin
If it blinks 4 times and repeats, the ice
•
thickness is set at normal.
If it blinks 6 times and repeats, the ice
•
thickness is set at thick
Pushing and releasing the Clean button between
flashes adjusts the thickness setting to the next
one.
.
.
Note: 10 push-and-releases will switch the
controller to ice thickness adjustment mode.
Pre-Test Mode: All 3 lights are on steady.
Test 1, testing the bin thermistor. The On light is
the indicator, if it is on steady, it is OK. If it blinks
twice and repeats, it is open. If it blinks 4 times and
repeats, it is shorted.
Test 2, testing the evaporator thermistor. The
Clean light is the indicator, if it is on steady, it is
OK. If it blinks twice and repeats, it is open. If it
blinks 4 times and repeats, it is shorted.
Test 3, testing the inlet water valve. Four minute
test.
Test 4, testing the water level sensor.
Test 5, testing the water pump.
Test 6, Testing the reservoir drain pump.
Test 7, testing the compressor and condenser fan
motor.
Test 8, testing the compressor and hot gas valve.
February 2008
Page 5
Service Manual
Technical Charts:
Bin Thermistor
Cut-In Cut-Out
Temperature Resistance Temperature Resistance
o
Bin 40
Evaporator Thermistor
Ice Thickness Temperature Resistance
Normal
Thin
F. +/- 1oF. 25.9k ohms +/- 3 % 35oF +/- 1oF. 29.8k ohms +/- 3 %
End Harvest Readings
o
F. +/- 3% 18.7k ohms +/-1%Thick
52
CS0415
Other Technical Information
Wattage @ 120 V Resistance
Compressor 244
Run 1 - 5
Start 3 - 11
Water pump 7.5 3.6
Reservoir drain pump 4.5 3.6
Water valve 20
Hot gas valve 7 - 9 385
Bin thermistor 10k @ 77
Evap thermistor 10k @ 77
Transformer 73
Fan motor 5.1 - 7.1 185
Cutter grid 20
o
F.
o
F.
July 2007
Page 6
Operational Modes:
CS0415
Service Manual
There are four main operational modes for the ice
maker:
Freeze
•
Harvest
•
Clean
•
Service (Diagnostics)
•
Ice Making Cycle
In addition, there are three possible “Off” cycles for
the ice maker. They occur when:
1. The bin is full of ice and the LED is illuminated
“ON/OFF” (Idle mode).
2. The “On/OFF” control switch has been held for
three seconds. The ON/OFF LED will go out.
Electrical System
Line Voltage is supplied to the electrical control
switches and the primary side of the step-down
dual transformer. The dual transformer reduces
120 VAC to 8.75 VAC for the cutter grid and the
bin light and 12 VAC for the drain and
recirculating pumps. The electronic control board
directs 12 VAC to the water recirculating and
reservoir drain pumps, and 120 VAC to the hot gas
solenoid, condenser fan motor, and compressor.
The measured fill water valve will always have 120
VAC on the BK and WH wires and 14 VDC on the
OR/WH and BK/RD wires.
An evaporator thermistor supplies temperature
information to the electronic control to determine
when to terminate the harvest cycle.
Refrigeration System
The hot gas refrigerant, under high pressure, is
forced through the condenser, where it changes
into a liquid, and flows through the drier and
capillary tube into the evaporator. Under low
pressure in the evaporator, the liquid refrigerant
absorbs heat from the water flowing over the
evaporator as the refrigerant evaporates into a gas.
As a low pressure gas, the refrigerant flows back
through the suction line of the heat exchanger, to
the compressor.
During the Freeze mode, some of the hot gas that
is in the condenser accumulating tube, condenses
to a liquid, and remains in the accumulating tube.
During the later stages of the Freeze mode, as the
ice slab forms on the evaporator freezing plate,
some of the refrigerant passing through the
evaporator will not evaporate into a gas, but will
remain a liquid. This liquid refrigerant will settle in
the accumulator, while the refrigerant vapor is
sucked off through the suction tube at the top of the
accumulator. This accumulated liquid refrigerant
will eventually be directed to the evaporator to
quickly warm the evaporator plate during the
Harvest mode.
Note: It is very important that the accumulator is
not tilted out of a horizontal position. If moved, it
could cause compressor failure.
Water System
The water recirculating pump moves the water from
the reservoir pan up to the distributor, where it
flows out over the evaporator freezing plate.
Water that does not freeze on the evaporator plate
runs off the front edge, and falls back into the
reservoir, where it is recirculated back to the water
distributor.
As the ice slab forms, the minerals in the water are
on the surface of the ice. The water flowing over
the top of the ice slab washes these minerals back
into the water reservoir pan. The water continues to
recirculate until the water level in the reservoir
drops to the bottom of the water level sensor.
When the water level in the reservoir drops below
the sensor, the control terminates the freeze mode
and initiates the harvest mode.
The control signals the measured fill valve to fill to
the selected water level setting. The measured fill
valve uses a flow meter to accurately fill to the
correct volume.
•
Thin Ice uses 32 ounces (954cc),
•
Normal Ice 37 ounces (1106cc), and
•
Thick Ice 42.5 ounces (1258cc).
July 2007
Page 7
Harvest Mode
CS0415
Service Manual
Electrical System
When the water level in the reservoir drops below
the water level sensor it signals the electronic
control to terminate power to the condenser fan,
and then the water recirculating pump. The
reservoir drain pump is activated to fully drain the
reservoir. Power is then supplied to the hot gas
valve and a fill request is sent to the measured fill
valve. The fill valve fills to the requested volume
while the hot gas valve is energized for the balance
of the harvest mode.
If the evaporator thermistor is unplugged, the
evaporator defaults to a timed 4 minute harvest.
If the water level sensor is disconnected or open,
the control defaults to 25 minutes of freeze time.
The cleaning indicator LED feature will not function
if the water level sensor is disconnected.
Refrigeration System
The electronic control board operates the various
components and systems in the ice maker for each
of the Freeze and Harvest modes.
Clean Mode
Electrical System
The electronic control board operates the various
components and systems during the Clean mode.
Water System
When the service control switch is in the “Clean”
position, the water pump circulates the cleaning
solution that has been added to the reservoir, up to
the water distributor, across the evaporator, and
back into the reservoir, where it is recirculated. The
compressor and hot gas valve operate to heat the
evaporator.
The hot gas valve opens, allowing high pressure
refrigerant gas to bypass the condenser, and flow
through the condenser accumulating tube. The hot
gas pushes the liquid refrigerant that has
accumulated in the accumulator tube up into the
evaporator. The hot liquid refrigerant evenly heats
the evaporator plate so that the ice slab releases
quickly and evenly.
The ice slab, when released, slides off of the
evaporator plate onto the cutter grid.
Water System
The electronic control board sends a signal to the
water valve. The signal tells the water valve how
much water to be filled, allowing water to flow into
the water reservoir pan. The water fill volume is
determined by the ice thickness setting.
As a result of the hot gas flow and the ice sliding off
the evaporator plate, the evaporator temperature
begins to rise. When the evaporator thermistor
reaches the set temperature (52°F), the unit
switches to the Freeze mode. This cycling between
Freeze and Harvest, continues until the ice bin is
full.
July 2007
Page 8
Component Location
CS0415
Service Manual
Evaporator
Cutter Grid
Compressor
Transformer
Light Switch
Controller
Push Button Switches
Bin
Thermistor
Water Level Sensor
Water Pump
Reservoir Drain
Pump
Fan Motor
Hot Gas Valve
Measured Fill Inlet
Water Solenoid Valve
Condenser
Condenser Accumulator Tube
July 2007
Page 9
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