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 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.
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, 506, 656, 806: AutoIQ™ Cubers Pre-Installation Location of Nameplate Other Applications: (on the back, plus a serial plate is behind the front panel) Models CME256, CME506, CME656 or CME806 may be placed on certain Ice Dispensers, including Scotsman models: HD356, CD200, RS220 and IS220. 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.
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.
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. 3. Place the upper machine onto the lower machine.
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. 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. Supply: Air cooled models have 1 water supply connection, a 3 8“ male flare at the back of the cabinet.
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.
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.
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.
CME256, 506, 656, 806: AutoIQ™ Cubers AutoIQ Controller: Indicator Lights: • Bin Full: On when bin is full, goes on and • • • • • • Cycle Definitions: • Freeze: The refrigeration system is 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.
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.
CME256, 506, 656, 806: AutoIQ™ Cubers Adjustments: If there was a problem during Initial Start Up: If an error light came on, check the following. How to Adjust Cube Size (Reference Only) The adjustment is done by moving the long screw located in the floating stem at the front of the machine. 1. Water error.
CME256, 506, 656, 806: AutoIQ™ Cubers Adjustments: How to adjust the water cooled discharge pressure Water cooled models use a water regulating valve to control how much cooling water flows thru the water cooled condenser. At the top of that valve, located in the right rear corner of the ice machine, is an adjustment stem. To Adjust: 1. Attach a refrigeration manifold gage to the discharge access valve. 2. While the unit is in the freeze cycle, determine the discharge pressure, it should be about 245 PSIG.
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. Freeze Button. Pushing and releasing this button starts or restarts the machine. The System Controller remembers what cycle it was last in and returns to that cycle. 2.
CME256, 506, 656, 806: AutoIQ™ Cubers How The Electronic Cuber Works This section is intended for the technician. It is not necessary for the normal operation and maintenance of the machine. Refrigeration System: The refrigeration system is similar to that of most commercial cube ice machines. Heat is removed The AutoIQ Controller operates the ice machine by from the water and discharged out the condenser during the freeze cycle.
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 Water Pump is ON Compressor is ON Hot Gas Valve is ON 6. Once per cycle the machine may shut off the water pump. It only does this when the water temperature reaches a preset minimum (38oF. or 27835 ohms).
CME256, 506, 656, 806: AutoIQ™ Cubers Technicians Only: Harvest Cycle Operational Sequence Harvest Stacked Units: The (air cooled model) fan is off. If the bottom unit is in harvest and receives a The water valve opens and fills the reservoir to the signal from the top unit that it is also in Harvest, the bottom unit will stay in harvest for its Maximum Full level. Harvest Time. The water pump shuts off, it will restart in less than Diagnostic Lights and Manual Resets a minute.
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. This chemical dissolves mineral build up that forms during the ice making process.
CME256, 506, 656, 806: AutoIQ™ Cubers Additional Maintenance To drain reservoir completely (if desired): To Sanitize the Ice Storage Bin 1. Remove front panel. 1. Remove all ice. 2. Push and hold the Off button. 2. Remove baffle. 3. Remove screw holding reservoir cover, pull inlet 3. Switch ice machine OFF or wait for it to be in a tube out of reservoir cover, lift cover out of cleaning cycle. machine. 4. Mix a 1 gallon solution of warm (95-115oF.) 4.
CME256, 506, 656, 806: AutoIQ™ Cubers Additional Maintenance: Water Distributors It may become necessary to remove the water distributors from the top of the evaporator and clean (de-mineralize) them outside of the ice machine. 1. Remove front panel. 2. Push and release the OFF button. Single Unit Installation: 9a. Snap the two distributors onto the water manifold. Place them on the back evaporator, right end first.
CME256, 506, 656, 806: AutoIQ™ Cubers Additional Maintenance: Inlet Water Valve Screen The inlet water valve has a screen on its inlet side to keep debris from flowing into the valve. In some cases, this screen may become clogged or restricted by debris build up. Check for the proper water flow: To Check the Inlet Water Valve Screen. 1. Disconnect the electrical power. 2. Shut off the water supply. 3. Remove the front panel. Flow rate is 1.25 G.P.M. 4.
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. They must be free of mineral build up to function properly. To check: Air Filter Replacement 1. Remove front panel. 1. Remove the front panel. 2. Push and release the off button. 2. Push and release the Off button. 3.
CME256, 506, 656, 806: AutoIQ™ Cubers Service Diagnosis: Controller Diagnostic Light Analysis Problem or Symptom Possible Cause Probable Correction Machine is off Bin is full, ice in cube port Use some ice Power is off, check controller lights. If all lights are out, check power supply, restore power if off Transformer is open If all lights are out and there is power, check transformer output for 24 vac Unit has been switched off Off lite is glowing Push and release Freeze button to restart unit.
CME256, 506, 656, 806: AutoIQ™ Cubers Service Diagnosis Problem or Symptom Possible Cause Probable Correction 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. Check bin controls. The bin full light should be off. If it is on or blinking the bin controls may be dirty. Clean if dirty. The board and bin controls may also need to be checked. Push and release Off button. Push and release Freeze button.
CME256, 506, 656, 806: AutoIQ™ Cubers Service Diagnosis: Components Problem or Symptom Possible Cause Probable Correction Fan motor does not turn. Refrigeration light may be on steadily or blinks 3 times and repeats. Open motor windings, or seized bearings Replace fan motor No power to 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.
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. • A wire connects the other terminal of the PTCR to the compressor’s Start winding. • Another wire connects the run capacitor to the start winding.
CME256, 506, 656, 806: AutoIQ™ Cubers Operational Characteristics: CME256 Cycle Times (minutes): Air Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF. water Freeze 15 - 17 17 - 19 Harvest 1.5 - 2 1:30 - 2 Water Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF. water Freeze 13 - 15 17 - 19 Harvest 1:30 - 2 1:45 - 2:15 System Pressures (PSIG): Air Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF.
CME256, 506, 656, 806: AutoIQ™ Cubers Operational Characteristics: CME506 Cycle Times (minutes): Air Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF. water Freeze 18 - 20 22 - 24 Harvest 2 1:30 Water Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF. water Freeze 20 - 22 22 - 24 Harvest 1.5 - 2.5 1.5 - 2 System Pressures (PSIG): Air Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF.
CME256, 506, 656, 806: AutoIQ™ Cubers Operational Characteristics: CME656 Cycle Times (minutes): Air Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF. water Freeze 14 - 15 15 - 16 Harvest 1:30 1:30 Water Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF. water Freeze 15 - 16 16 - 17 Harvest 3 2 System Pressures (PSIG): Air Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF.
CME256, 506, 656, 806: AutoIQ™ Cubers Operational Characteristics: CME806 Cycle Times (minutes) Air Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF. water Freeze 9 - 11 12 - 14 Harvest 1:45 1:15 Water Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF. water Freeze 10 - 12 12 - 13 Harvest 1:45 1:15 System Pressures Air Cooled 70oF. indoor air, 50oF. water 90oF. indoor air, 70oF.
CME256, 506, 656, 806: AutoIQ™ Cubers Removal and Replacement Inlet Water Valve Air Filter Replacement 1. Remove the front panel. 1. Remove the front panel. 2. Shut off the water supply. 2. Push and release the Off button. 3. Push and release the OFF button. 3. Remove side panel retaining screws (2 for each panel). 4. Pull the wire harness off the inlet water valve. 5. Remove screws holding the inlet water valve to the cabinet. 6. Pull the valve away from the cabinet and disconnect the outlet tube.
CME256, 506, 656, 806: AutoIQ™ Cubers Removal and Replacement Drain Tubing Water Pump 1. Remove the front panel. 1. Disconnect the electrical power. 2. Push and release the Off button. 2. Remove the front panel. 3. Remove bin baffle. 3. Unplug water pump from its electrical connection. 4. Remove 1 plastic bolt and the reservoir cover. 5. Unplug water pump, disconnect ground wire. 4. Remove 1 plastic bolt and the reservoir cover. 5. Lift water pump up and disconnect outlet tube. 6.
CME256, 506, 656, 806: AutoIQ™ Cubers Removal and Replacement: Sensors Electric Eyes (Bin Control / Ice Sensors) These must be replaced as a set. Note: Replacement float stems are factory set, but confirm the settings before installing the new stem: CME256: Slot size should be between 1 7 32“ and 1 3 16”. 1. Remove front panel. 2. Push and release the Off button. CME506 or CME656 or CME806: Slot size should be 2". 3. Remove top panel.
CME256, 506, 656, 806: AutoIQ™ Cubers Removal and Replacement: Fan Blade and/or Fan Motor 1. Disconnect electrical power. Discharge Line Temperature Sensor 2. Remove front, top and side panels. 1. Remove front panel, push and release the Off button. 3. Remove the 4 cap screws holding the fan motor 2. Remove top and left side panels. bracket to the condenser shroud. 3. Locate discharge line sensor. It is attached to the discharge line of the compressor, 6" from the compressor discharge port. 4.
CME256, 506, 656, 806: AutoIQ™ Cubers Access Valves: To use the access valves: Refrigeration System Components 1. Be sure that the valve is closed. Remove the stem cap and insert a 3/16" allen wrench. Check that the valve is closed. Due to the expected level of training and experience of a refrigeration mechanic, detailed instructions regarding the replacement of refrigeration components will not be presented. However, critical items will be noted here. 2.
CME256, 506, 656, 806: AutoIQ™ Cubers 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. 2. Has power been shut off to the ice machine? If yes, the ice machine will automatically restart when power is restored. To Manually Reset the machine: 1. Remove the front panel. 2. Locate the AutoIQ Controller.
