CME256, 506, 656, 806: AutoIQ™ Cubers
Introduction:
This product manual contains the information needed for the setup, installation, initial start up, sanitation and maintenance of this ice machine. Keep it for future reference.
All series of these 4 models are covered in this manual:
•CME256, a 115 volt, single evaporator machine
•CME506, a 115 volt, dual evaporator machine (115 volt if 60 Hz, 230 volt if 50 Hz)
Be certain that the information applies to the model in question. If no model is listed, the information applies to all models, including A through F series.
This manual is organized in the same way as the expected use of the machine, it begins with specifications, goes thru unpacking and setup, shows where everything is; continues with initial start up, then describes how it works. After that is the sanitation section, followed by service diagnosis and repair.
•CME656 and CME806, 230 volt, dual evaporator machines
Table of Contents
Specifications: . . . . . . . . . . . . . . . . |
page 2 |
Additional Maintenance: Water Distributors . |
page 20 |
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Pre-Installation . . . . . . . . . . . . . . . . |
page 3 |
Additional Maintenance: Inlet Water Valve Screen |
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page 21 |
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Location & Assembly: . . . . . . . . . . . . . |
page 4 |
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Additional Maintenance: Bin Controls, Condenser |
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Stacking: . . . . . . . . . . . . . . . . . . . |
page 5 |
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page 22 |
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Plumbing: . . . . . . . . . . . . . . . . . . . |
page 6 |
Service Diagnosis: Controller Diagnostic Light Analysis |
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page 23 |
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Electrical: . . . . . . . . . . . . . . . . . . . |
page 7 |
Service Diagnosis . . . . . . . . . . . . . . . |
page 24 |
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After Utility Connections: . . . . . . . . . . . |
page 8 |
Service Diagnosis: Components . . . . . . . |
page 25 |
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Component Location and Function: . . . . . . |
page 9 |
PTCR Diagnosis . . . . . . . . . . . . . . . |
page 26 |
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AutoIQ Controller: . . . . . . . . . . . . . . . |
page 10 |
Operational Characteristics: CME256 . . . . |
page 27 |
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Initial Start Up: . . . . . . . . . . . . . . . . |
page 11 |
Operational Characteristics: CME506 . . . . |
page 28 |
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Adjustments: . . . . . . . . . . . . . . . . . |
page 12 |
Operational Characteristics: CME656 . . . . |
page 29 |
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Adjustments: . . . . . . . . . . . . . . . . . |
page 13 |
Operational Characteristics: CME806 . . . . |
page 30 |
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How To Operate The AutoIQ Controller . . . |
page 14 |
Removal and Replacement . . . . . . . . . . |
page 31 |
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How The Electronic Cuber Works . . . . . . |
page 15 |
Removal and Replacement . . . . . . . . . . |
page 32 |
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Technicians Only: Freeze Cycle Operational Sequence |
Removal and Replacement: Sensors . . . . . |
page 33 |
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page 16 |
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Technicians Only: Harvest Cycle Operational Sequence |
Removal and Replacement: Fan Blade and/or Fan |
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Motor . . . . . . . . . . . . . . . . . . . . . |
page 34 |
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page 17 |
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Sanitation and Cleaning . . . . . . . . . . . |
page 18 |
Access Valves: . . . . . . . . . . . . . . . . |
page 35 |
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Additional Maintenance . . . . . . . . . . . . |
page 19 |
Before Calling for Service . . . . . . . . . . . |
page 36 |
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Parts lists are in the center section. |
Printed on Recycled Paper. |
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June 2002 |
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Page 1 |
CME256, 506, 656, 806: AutoIQ™ Cubers
Specifications:
These ice machines are designed to be installed indoors, in a controlled environment. They can operate satisfactorily under a wide variety of conditions. However, Do NOT operate the machine where it has not been designed for. Do NOT operate the machine in temperatures it has not been designed for. Do NOT operate the machine above or below the voltage limits for the particular model. Do NOT operate the machine with too little or too much water pressure.
CME256 or CME506 Operational Limits
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Minimum |
Maximum |
Air Temperature |
50oF. |
100oF. |
Water Temperature |
40oF. |
100oF. |
Water Pressure |
20 psi |
80 psi |
Voltage (115 volt model) |
103 |
126 |
Voltage (208-230 volt mdl) |
198 |
253 |
Voltage (230 volt model) |
207 |
253 |
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CME656 or CME806 Operational Limits
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Minimum |
Maximum |
Air Temperature |
50oF. |
100oF. |
Water Temperature |
40oF. |
100oF. |
Water Pressure |
20 psi |
80 psi |
Voltage (60 Hz model) |
198 |
253 |
Voltage (50 Hz model) |
207 |
253 |
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BASIC INFORMATION
All models will fit a standard, 30" wide Scotsman Ice Storage Bin. Some examples are:
• BH550; HTB555; HTB350; HTB250
The CME256 and CME506 are the typical models used in hotel applications and they fit the Scotsman HD30 dispenser without an adapter. All models fit the ID200 or ID250 dispensers which require a KBT44 adapter. Check Scotsman’s sales literature for other application information.
Note: These machines fill the bin very full, up to the base of the ice machine. Bin Model BH800 may need kit KBaffle2 and Bin Model BH550 may need kit KBaffle1. In some cases the ice level in the bin may be too high for a customer's needs. A thermostat kit is available to lower the ice level, its part number is A37749-001.
A stacking kit, for like models, is KSCME6-30.
Scotsman reserves the right to make design changes and/or improvements at any time. Specifications and designs are subject to change without notice.
Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way, including the use of any parts and/or other components not specifically approved by Scotsman.
Current Model |
Dimensions |
Basic |
Condenser |
Minimum |
Maximum |
Refrigerant |
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W" x D" x H" |
Circuit |
Charge |
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Number |
Electrical |
Type |
Fuse Size |
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(w/o bin) |
Ampacity |
(R-404A) |
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CME256AS-1F |
30 x 24 x 27 |
115/60/1 |
Air Cooled |
16 |
20 |
see page |
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CME256WS-1F |
same |
115/60/1 |
Water Cooled |
16 |
20 |
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27 |
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CME256AS-32F |
same |
208-230/60/1 |
Air Cooled |
7.9 |
15 |
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CME506AS-1F |
same |
115/60/1 |
Air Cooled |
19 |
20 |
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CME506WS-1F |
same |
115/60/1 |
Water Cooled |
19 |
20 |
see page |
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CME506AS-6F |
same |
230/50/1 |
Air Cooled |
7.9 |
15 |
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28 |
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CME506WS-6F |
same |
230/50/1 |
Water Cooled |
7.1 |
15 |
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CME506AS-32F |
same |
208-230/60/1 |
Air Cooled |
8.9 |
15 |
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CME656AS-32F |
same |
208-230/60/1 |
Air Cooled |
13.6 |
20 |
36 ounces |
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CME656WS-32F |
same |
208-230/60/1 |
Water Cooled |
12.7 |
20 |
26 ounces |
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CME656AS-3F |
same |
208-230/60/3 |
Air Cooled |
6.6 |
15 |
36 ounces |
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CME656WS-3F |
same |
208-230/60/3 |
Water Cooled |
5.8 |
15 |
26 ounces |
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CME656AS-6F |
same |
230/50/1 |
Air Cooled |
13.4 |
20 |
36 ounces |
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CME656WS-6F |
same |
230/50/1 |
Water Cooled |
12.6 |
20 |
26 ounces |
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CME806AS-32F |
same |
208-230/60/1 |
Air Cooled |
17.5 |
20 |
32 ounces |
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CME806WS-32F |
same |
208-230/60/1 |
Water Cooled |
16.0 |
20 |
24 ounces |
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CME806AS-6F |
same |
230/50/1 |
Air Cooled |
17.6 |
20 |
32 ounces |
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CME806WS-6F |
same |
230/50/1 |
Water Cooled |
16.2 |
20 |
24 ounces |
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February 2005
Page 2
CME256, 506, 656, 806: AutoIQ™ Cubers
Pre-Installation
Other Applications:
Models CME256 or CME506 may be placed on certain Ice Dispensers, including Scotsman models: HD30, ID200 and ID250.
Check with other dispenser manufacturers for recommendations regarding application.
Check the nameplate for electrical requirements. The nameplate is located on the back of the ice machine. While the model and serial number are on the nameplate, a serial number plate is located at the front of the machine, below the metal control box.
Water:
There is no such thing as pure water. There are two ways water can contain impurities: in suspension or in solution. Suspended solids can be filtered out. In solution or dissolved solids must be diluted or 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.
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 “rinse” out the water system to keep hard water scale from clogging up the machine. That water rinse, combined with water filters, prolongs the times between needed water system cleaning.
Note: All Scotsman CM3 models, like those described in this manual, feature Scotsman’s AutoIQ™ control system and ReliaClean™ water system cleaning process.
Location of Nameplate
(on the back, plus a serial plate is behind the front panel)
Nameplate
Back View Diagram (air cooled)
Service Technicians: All models are set by the factory at a “standard” water rinse, which is compatible with typical water conditions. The ReliaClean™ water system provides an adjustment method so to the amount of water rinsed per cycle can be changed. If the prior ice machine worked acceptably well with the local water conditions, leave the machine at the factory setting. If severe water conditions are present, and water filters do not solve the problem acceptably, adjust the machine to use more water. If water conditions are excellent, adjust the machine to use less water. See the Adjustments section.
Note: Water use adjustments are customer convenience adjustments; they are NOT factory defects and are NOT covered by warranty.
Top View Diagram
Note: Although the machine will function, ice capacity of air cooled machines will be significantly reduced with only 6 inches of clearance at the sides, back and top.
July 2004
Page 3
CME256, 506, 656, 806: AutoIQ™ Cubers
Location & Assembly:
Air cooled models take room temperature air in from the left and right sides, and discharge warm air out the back. If installed in a corner or with another cabinet next to the right side, an air baffle could be installed on the back of the cabinet to minimize air re-circulation.
A 6 inch minimum clearance on the back, left and right sides is required for operation and service of this machine.
Air Flows in the Sides
and Out the Back
Note: Although the machine will function, ice capacity of air cooled machines will be significantly reduced with only 6 inches of clearance at the sides, back and top.
Unpacking and Assembly:
Begin with unpacking the ice storage bin. Remove the carton, and using part of the carton as a cushion, tip the bin on its back to remove the skid and attach the legs or casters. Note: Stacked applications may not use casters.
Return the bin to an upright position. Check the bin top gasket for gaps and tears, fill any in with food grade sealant prior to placing the ice machine on the bin.
If the ice machine has not been unpacked, do so now. Remove the carton from the skid. Lift the ice machine off the skid directly onto the bin.
Note: The machine is heavy! Use a mechanical hoist if necessary.
Secure the ice machine to the bin with the hardware provided (two metal straps and 4 bolts).
Cabinet Panel Removal:
Note: The top panel holds the upper edges of the side panels in place.
1. Front Panel, “A” series: Remove the front panel by removing the four screws connecting the front panel to the left and right sides.
Remove
Second
Remove
First
Removal of Panels
Front Panel “C thru F” Series: Remove top two screws, and pull the bottom of the panel away from the machine to unsnap it from the machine.
2.Remove 2 screws at the front edge of the top panel, and pull the top panel forward until it releases from the tabs connecting it to the back panel.
3.Remove the screws at the front edge of each side panel, and pull them forward until they release from the tabs connecting them to the back panel.
July 2004
Page 4
CME256, 506, 656, 806: AutoIQ™ Cubers
Stacking:
Models CME256, CME506, CME656 and CME806 may be stacked together in any combination. Use kit number KSCME6-30:
1.Remove the front, left side and top panels from the bottom machine. Discard the top panel.
2.Remove the front and left side panels from
the top machine.
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Mounting Strap, |
3. Place the upper machine onto the lower |
Machine to |
machine. Check that the tabs on the top of the |
Machine |
freezing compartment in the lower machine |
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engage the slot in the base of the upper |
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machine (around the cube port). |
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4. Fasten the upper cabinet to the lower |
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cabinet with the hardware (two metal straps |
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and four bolts) provided with the machine. |
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5. Knock out 1 hole in the upper left (viewed |
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from the front) corner of the lower unit’s back |
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panel. Knock out the hole in the lower left |
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(viewed from the front) corner of the upper |
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unit’s back panel. |
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6. Position the strain reliefs over the wrapped |
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portion of the stacking kit wire harness. |
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Route the Stacking Kit Wire Harness from the |
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back to the top and bottom machines thru the |
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holes made in step 5. The harness is marked |
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which end goes to which machine. Push the |
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strain reliefs into place from the back of the |
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machines. |
Mounting Strap, |
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Follow local electrical codes for 24 volt wire. |
Machine to Bin |
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In the lower unit, route the wire behind the |
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suction line and thru the snap bushing just |
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below the Controller. Tape any excess wire to |
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the insulated suction line. |
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In the upper unit, route the harness thru the snap bushing just below the System Controller.
Plug one end into each Controller connection
number 7. |
Wire Harness from |
7. Place insulation pad from the kit over the |
Stacking Kit |
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reservoir drain tubing in the upper machine. |
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Make certain that the insulation is in contact |
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with the tubing. |
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8. Return all panels to their normal places. |
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Stacking Like Models
January 2002
Page 5
CME256, 506, 656, 806: AutoIQ™ Cubers
Plumbing:
All models require an adequate potable water supply and a gravity drain. The recommendations for tubing are: Water supply to be 3 8“ OD. Drain to be ¾ “ OD.
Supply:
Drain:
Air cooled models have 1 gravity drain connection, a ¾ “ FPT fitting at the back of the cabinet.
It must be vented at the back of the cabinet.
Air cooled models have 1 water supply connection, a 3 8“ male flare at the back of the cabinet. Water cooled models have an additional 3 8” FPT condenser inlet connection at the back of the cabinet.
Potable Water |
Water Cooled |
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Plumbing |
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Inlet |
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Connections |
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Condenser
Water Inlet
Water cooled models have an additional condenser drain, it is a ½ “ FPT fitting at the back of the cabinet. Do not vent this drain.
The ice storage bin will have a drain out the back or base, depending upon the model. Note: Scotsman HTB555 (shown in this manual) may be drained either out the back or the base.
Condenser
Drain
Potable
Water Inlet
Optional
Filter
Reservoir 
Drain, Must
Be Vented
Separate
Drains for
Bin and
Machine
Plumbing
Connections
HTB555
Drains
Insulation is recommended for the ice machine reservoir and bin drains.
Follow all applicable codes
January 2002
Page 6
CME256, 506, 656, 806: AutoIQ™ Cubers
Electrical:
All models must be installed with the correct wire size and type per the National Electric Code. Locate the nameplate on the back of the cabinet and find the numbers for Voltage, Phase, Minimum Circuit Ampacity and Maximum Fuse Size. Either fuses or HACR type circuit breakers may be used.
Electrical connections are made in the junction box in the back of the cabinet.
1.Remove the junction box cover.
2.Knock out 1 hole for a field supplied strain relief.
3.Install wires and strain relief per code.
4.Connect to wires and secure ground wire to
ground screw inside junction box. |
Junction Box |
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Electrical Access
Follow all Local, State and National codes.
Electrical Connection
January 2002
Page 7
CME256, 506, 656, 806: AutoIQ™ Cubers
After Utility Connections:
1.Level the cabinet, use the leg levelers on the end of the legs to adjust the cabinet height.
2.Wash out the bin. If desired, the interior of the bin could be sanitized.
3.Locate the ice scoop (if supplied) and have it available for use when needed.
Final Check List:
1.Is the unit located indoors in a controlled environment?
2.Is the unit located where it can receive adequate cooling air?
3.Has the correct electrical power been supplied to the machine?
4.Have all the water supply connections been made?
5.Have all the drain connections been made?
6.Has the unit been leveled? The unit must be leveled at the water reservoir.
7.Have all unpacking materials been removed?
8.Is the water pressure adequate?
9.Have the drain connections been checked for leaks?
10.Has the bin interior been wiped clean or sanitized?
11.Have any water filter cartridges been replaced?
January 2002
Page 8
CME256, 506, 656, 806: AutoIQ™ Cubers
Component Location and Function:
Reservoir: Contains the water charge used for every batch of ice.
Water Inlet Valve: Opens to allow water into the reservoir.
Water Level Sensor: Controls the size of the ice cube by measuring how much water is used in a cycle. It consists of a float, stem and electric eye. The stem will move slightly when the pump is on, this is normal. As the machine makes ice the reservoir water level will fall and the visible portion of the stem will slide down thru the slot in the sensor body.
AutoIQ Controller: Controls the complete operation of the ice machine. Turns it on and off; switches it between cycles; shows information via indicator lights; and shuts the machine down if there is a problem.
Evaporators/Freezing Compartment: Location of the evaporators. Ice forms on the evaporators and is released when warmed up during the harvest cycle. The freezing compartment is fully insulated for maximum efficiency.
Cube Deflector: The slots in the inclined deflector let the water falling from the evaporators back into the reservoir, but when ice falls during harvest, the ice slides off into the bin.
Refrigeration Service Access Valves: Only to be used by a certified technician. Allows access to the refrigeration system for diagnostic information.
Water Pump: Forces the water from the reservoir to the top of the evaporator(s). The motor is separated from the reservoir water to minimize contact with the water.
Compressor: The refrigerant vapor pump, it forces the refrigerant to flow thru the refrigeration system tubing.
Hot Gas Valve: Closed during freeze, it opens during harvest to divert hot discharge refrigerant gas into the inlet of the evaporators.
Condenser: Either air or water cooled, discharges the heat produced in ice making.
Access Valves
AutoIQ
Controller
Evaporators
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Cube |
Compressor |
Deflector |
Water Pump
Inlet Water
Valve
Water Level
Sensor
Reservoir
Component Location
January 2002
Page 9
CME256, 506, 656, 806: AutoIQ™ Cubers
AutoIQ Controller:
Indicator Lights: |
Cycle Definitions: |
•Bin Full: On when bin is full, goes on and off as ice falls during a harvest cycle.
•Freeze: On when the unit is in the Freeze cycle, blinks when a freeze mode is pending.
•Harvest: On when the unit is in the Harvest cycle.
•Clean: On when the unit is in the Clean cycle, blinks when preparing for a clean mode.
•Off: On when the unit has been switched off, blinks when the machine is preparing to shut off.
•Water Error: On when the controller has identified a problem with the water system.
•Refrigeration Error: On when the controller has identified a problem with the refrigeration system.
•Freeze: The refrigeration system is operating to remove heat from the evaporators. The compressor, fan motor (if air cooled) and water pump are ON.
•Harvest: The refrigeration and water systems are operating to harvest the ice cubes. While the compressor is on for the full cycle, the water pump will be off at the beginning and inlet water valve will switch off before the end.
•Clean: The Inlet Water Valve opens to fill the reservoir, The Water Pump starts. The Clean indicator light is switched ON. A manually initiated rinse flushes the system.
Low Voltage In/out
Water Valve
Hot Gas Valve
Contactor Coil
Stacking
Future Use
Reservoir & Discharge
Line Thermistors
Bin Control Sensor
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Hi Voltage In/out |
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Water Pump |
8 |
9 |
Air Cooled Fan Motor |
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7
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Push Button |
6 |
Control Switches |
5 |
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Indicator Lights: |
4 |
BIN FULL |
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FREEZE |
Bin Control Sensor
Reservoir Water
Level Sensor
Factory Use
3
2
1
HARVEST
CLEAN
OFF
Diagnostic Lights
WATER 
REFRIGERATION
AutoIQ Controller: Wire Connections, Push Buttons, and Indicator Lights
January 2002
Page 10
CME256, 506, 656, 806: AutoIQ™ Cubers
Initial Start Up:
1.Remove the front panel.
2.Locate the AutoIQ Controller.
3.Switch on the electrical power. Note that the indicator lights all flashed on briefly.
4.Open the water supply valve.
5.Push and release the Freeze cycle push button (the Freeze indicator light will blink until the compressor starts). The next several operations are automatic.
Initial Start Sequence
•The Freeze light is blinking.
•The Hot Gas Solenoid valve is open.
•The inlet water valve opens to fill the reservoir. The inlet water valve will shut off when the reservoir is full.
•The water pump starts to pump water.
•The inlet water valve opens again to refill the reservoir.
•After 30 seconds the compressor starts.
•After 5 seconds the hot gas valve closes.
Freeze Cycle:
•The Freeze indicator light will come on. The machine will stay in a Freeze cycle for many minutes. Slush may appear in the reservoir, it is temporary and normal.
•Under certain conditions, the pump may stop for a few seconds. After that the inlet water valve will refill the reservoir.
•The fan motor (of air cooled models) will begin to turn and soon warm air will be forced out the back of the cabinet.
•The freeze cycle will continue until the water level in the reservoir drops to its factory set point, then the Harvest Cycle will begin.
Harvest Cycle:
•The Harvest indicator light will be ON,
•The hot gas valve will open.
•The water pump will stop. It will restart in less than a minute.
•The Inlet water valve will open. The machine will fill the reservoir and overflow it for a specified number of seconds then shut off. The harvest cycle may still be in progress.
•The Bin Full indicator light will go on and off as ice falls from the evaporators.
6. Machines are shipped from the factory with the purge level set to accommodate average water conditions. See page 13 for purge adjustment instructions.
24 hours of run time may be need to attain full ice making capacity.
7.The machine’s correct cube size should result in ice falling from the evaporator in vertical strips of 8 - 10 cubes; the top 2 cubes might fall individually.
8.After a few minutes the machine will return to a freeze cycle.
9.Fill out the Customer Evaluation and Warranty Registration. Send it to Scotsman.
10.Replace the front panel.
11.Inform the user of the location and telephone number of the local service company. Also inform the user of the required maintenance of the machine.
Notes On Operation:
1.The electric eyes signal the ice machine to shut off whenever the bin becomes full. After the eyes sense that there is ice between them, the ice machine will shut off at the end of the next harvest cycle. This last harvest cycle will be longer than the rest.
2.After the bin has filled the ice machine will not be able to restart for 4 minutes. However, if needed, the Freeze button may be pushed and the unit will restart.
For example: If ice is removed from the bin immediately after the machine has filled up and shut off, the machine will not restart for 4 minutes.
3. If the bin controls sense a bin full signal before any water is used (float stem up), the machine will shut off on bin full.
July 2004
Page 11
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