Scotsman CME256 Product Manual
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Scotsman CME256 Product Manual

Autoiq cubers
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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)
•
CME656 and CME806, 230 volt, dual
evaporator machines
Pre-Installation . . . . . . . . . . . . . . . . page 3
Stacking: . . . . . . . . . . . . . . . . . . . page 5
Plumbing: . . . . . . . . . . . . . . . . . . . page 6
Electrical: . . . . . . . . . . . . . . . . . . . page 7
After Utility Connections: . . . . . . . . . . . page 8
AutoIQ Controller: . . . . . . . . . . . . . . . page 10
Initial Start Up: . . . . . . . . . . . . . . . . page 11
Adjustments: . . . . . . . . . . . . . . . . . page 12
Adjustments: . . . . . . . . . . . . . . . . . page 13
Additional Maintenance . . . . . . . . . . . . page 19
Parts lists are in the center section.
CME256, 506, 656, 806: AutoIQ™ Cubers

Table of Contents

June 2002
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.
Service Diagnosis . . . . . . . . . . . . . . . page 24
Service Diagnosis: Components . . . . . . . page 25
PTCR Diagnosis . . . . . . . . . . . . . . . page 26
Removal and Replacement . . . . . . . . . . page 31
Removal and Replacement . . . . . . . . . . page 32
Access Valves: . . . . . . . . . . . . . . . . page 35
Before Calling for Service . . . . . . . . . . . page 36
Page 1
Printed on Recycled Paper.

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Summary of Contents for Scotsman CME256

  • Page 1: Table Of Contents

    Service Diagnosis: Components ..page 25 PTCR Diagnosis ....page 26 Operational Characteristics: CME256 ..page 27 Operational Characteristics: CME506 ..page 28 Operational Characteristics: CME656 .

  • Page 2: Specifications

    CME806AS-6F same CME806WS-6F same 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.

  • Page 3: Pre-Installation

    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.

  • Page 4: Location & Assembly

    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.

  • Page 5: Stacking

    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.

  • Page 6: Plumbing

    Do not vent this drain. ” FPT 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 Water Cooled drained either out the back or the base. Plumbing...

  • Page 7: Electrical

    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.

  • Page 8: After Utility Connections

    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.

  • Page 9: Component Location And Function

    Water Pump Water Level Sensor Reservoir CME256, 506, 656, 806: AutoIQ™ Cubers 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.

  • Page 10: Autoiq Controller

    CME256, 506, 656, 806: AutoIQ™ Cubers AutoIQ Controller: Indicator Lights: • 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.

  • Page 11: Initial Start Up

    • The Bin Full indicator light will go on and off as ice falls from the evaporators. CME256, 506, 656, 806: AutoIQ™ Cubers 6. Machines are shipped from the factory with the purge level set to accommodate average water conditions. See page 13 for purge adjustment instructions.

  • Page 12: Adjustments

    CME256, 506, 656, 806: AutoIQ™ Cubers Adjustments: If there was a problem during Initial Start If an error light came on, check the following. 1. Water error. A water error could have been determined by the System Controller if the inlet water valve does not fill the reservoir, or if the water pump does not start and lower the water level.

  • Page 13: Adjustments

    Thermostatic Expansion Valve: The TXV is not adjustable, do not attempt to adjust CME256, 506, 656, 806: AutoIQ™ Cubers How to Adjust the Amount of Water Purge Adjustment is done by use of the control buttons on the AutoIQ Controller.

  • Page 14: How To Operate The Autoiq Controller

    CME256, 506, 656, 806: AutoIQ™ Cubers How To Operate The AutoIQ Controller The AutoIQ Controller is a microprocessor based device that receives input from several sources and switches various components on and off. Its manual control is thru the use of the Push Button Control Switches 1.

  • Page 15: How The Electronic Cuber Works

    Compressor Water Cooled Condenser Reservoir Drain CME256, 506, 656, 806: AutoIQ™ Cubers Refrigeration System: The refrigeration system is similar to that of most commercial cube ice machines. Heat is removed from the water and discharged out the condenser during the freeze cycle. As liquid refrigerant...

  • Page 16: Technicians Only: Freeze Cycle Operational Sequence

    CME256, 506, 656, 806: AutoIQ™ Cubers Technicians Only: Freeze Cycle Operational Sequence Assuming the machine has been operational, the Freeze cycle begins with the end of the Harvest Cycle: • Reservoir is full • Condenser fan is OFF • Water Inlet Valve is OFF •...

  • Page 17: Technicians Only: Harvest Cycle Operational Sequence

    Note: The machine will not restart for 4 minutes after switching off on Bin Full, unless the freeze button is pressed. CME256, 506, 656, 806: AutoIQ™ Cubers Stacked Units: If the bottom unit is in harvest and receives a signal from the top unit that it is also in Harvest, the bottom unit will stay in harvest for its Maximum Harvest Time.

  • Page 18: Sanitation And Cleaning

    CME256, 506, 656, 806: AutoIQ™ Cubers Sanitation and Cleaning It is the User’s responsibility to keep the ice machine and ice storage bin in a sanitary condition. Without human intervention, sanitation will not be maintained. Ice machines also require occasional cleaning of their water systems with a specifically designed chemical.

  • Page 19: Additional Maintenance

    To Sanitize the Ice Storage Bin 1. Remove all ice. 2. Remove baffle. 3. Switch ice machine OFF or wait for it to be in a cleaning cycle. 4. Mix a 1 gallon solution of warm (95-115 o F.) water and sanitizer. Follow local codes for sanitizer.

  • Page 20: Additional Maintenance: Water Distributors

    Soak or scrub the distributors in or with a solution of Scotsman Ice Machine Cleaner and warm potable water. 9. Return the water distributors to their normal installed position.

  • Page 21: Additional Maintenance: Inlet Water Valve Screen

    3-4 seconds. Be prepared to push the Off button. If it does not, the water valve inlet or other water device is restricted. CME256, 506, 656, 806: AutoIQ™ Cubers To Check the Inlet Water Valve Screen. 1. Disconnect the electrical power.

  • Page 22: Additional Maintenance: Bin Controls, Condenser

    CME256, 506, 656, 806: AutoIQ™ Cubers Additional Maintenance: Bin Controls, Condenser The bin controls use a system of infrared emitting and receiving components to sense the build up of ice in the bin. They are located at the bottom of the ice outlet port.

  • Page 23: Service Diagnosis: Controller Diagnostic Light Analysis

    Reservoir temp. wrong * Machine may be reset by pushing and releasing the Off button, then pushing and releasing the Freeze button. ** See following pages CME256, 506, 656, 806: AutoIQ™ Cubers Probable Correction Use some ice If all lights are out, check power supply,...

  • Page 24: Service Diagnosis

    CME256, 506, 656, 806: AutoIQ™ Cubers Service Diagnosis Problem or Symptom Possible Cause Unit is off because of a Bin controls did not sense “Harvest Problem” ice falling, unit stayed in harvest until the maximum harvest time ran out. Bin controls or System Controller may have failed.

  • Page 25: Service Diagnosis: Components

    Open starting components Open windings Internal valve failure Water level too low or not sensed CME256, 506, 656, 806: AutoIQ™ Cubers Probable Correction Replace fan motor Fan motor unplugged, check for voltage from controller. If none, replace controller. Some models have a fan control switch, check it for continuity above 240 PSIG.

  • Page 26: Ptcr Diagnosis

    CME256, 506, 656, 806: AutoIQ™ Cubers PTCR Diagnosis The CME256, CME506, CME656 and CME806 “D” series cubers use a PTCR (Positive Temperature Coefficient Resistor) in place of a conventional start relay and start capacitor. • Power from the contactor connects to the PTCR and to the Run Capacitor.

  • Page 27: Operational Characteristics: Cme256

    Fan Control Switch - for units so equipped: • Cut In: 240 PSIG + - 20 PSIG • Cut Out: 190 PSIG + - 10 PSIG CME256, 506, 656, 806: AutoIQ™ Cubers F. indoor air, 50 F. water 15 - 17 1.5 - 2 F.

  • Page 28: Operational Characteristics: Cme506

    CME256, 506, 656, 806: AutoIQ™ Cubers Operational Characteristics: CME506 Cycle Times (minutes): Air Cooled Freeze Harvest Water Cooled Freeze Harvest System Pressures (PSIG): Air Cooled Suction: End of Freeze Suction: Peak in Harvest Discharge: 5 minutes into Freeze Discharge: Minimum in Harvest...

  • Page 29: Operational Characteristics: Cme656

    Fan Control Switch - for units so equipped: • Cut In: 240 PSIG + - 20 PSIG • Cut Out: 190 PSIG + - 10 PSIG CME256, 506, 656, 806: AutoIQ™ Cubers F. indoor air, 50 F. water 14 - 15 1:30 F.

  • Page 30: Operational Characteristics: Cme806

    CME256, 506, 656, 806: AutoIQ™ Cubers Operational Characteristics: CME806 Cycle Times (minutes) Air Cooled Freeze Harvest Water Cooled Freeze Harvest System Pressures Air Cooled Suction: End of Freeze Suction: Peak in Harvest Discharge: 5 minutes into Freeze Discharge: Minimum in Harvest...

  • Page 31: Removal And Replacement

    8. Reverse to reassemble. 9. Push and release the Freeze button. 10. Replace the front panel. CME256, 506, 656, 806: AutoIQ™ Cubers Air Filter Replacement 1. Remove the front panel. 2. Push and release the Off button. 3. Remove side panel retaining screws (2 for each panel).

  • Page 32: Removal And Replacement

    CME256, 506, 656, 806: AutoIQ™ Cubers Removal and Replacement Drain Tubing 1. Remove the front panel. 2. Push and release the Off button. 3. Remove bin baffle. 4. Remove 1 plastic bolt and the reservoir cover. 5. Unplug water pump, disconnect ground wire.

  • Page 33: Removal And Replacement: Sensors

    CME256, 506, 656, 806: AutoIQ™ Cubers Note: Replacement float stems are factory set, but confirm the settings before installing the new stem: CME256: Slot size should be between 1 ”. CME506 or CME656 or CME806: Slot size should be 2".

  • Page 34: Removal And Replacement: Fan Blade And/Or Fan Motor

    CME256, 506, 656, 806: AutoIQ™ Cubers Removal and Replacement: Fan Blade and/or Fan Motor 1. Disconnect electrical power. 2. Remove front, top and side panels. 3. Remove the 4 cap screws holding the fan motor bracket to the condenser shroud.

  • Page 35: Access Valves

    6. Remove the gages and replace the stem and port caps. Make certain that they are tightly closed. CME256, 506, 656, 806: AutoIQ™ Cubers Refrigeration System Components Due to the expected level of training and...

  • Page 36: Before Calling For Service

    Before Calling for Service Check the following: 1. Has the water supply to the ice machine or building been shut off? If it has, the ice machine will automatically restart within 25 minutes after water begins to flow to it.

This manual is also suitable for:

Cme506Cme656Cme806

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