Scotsman CU50 Service Manual
Scotsman ice systems ice maker user manual
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Also See for CU50:
- Technical training manual (57 pages) ,
- Installation and user manual (16 pages) ,
- Service manual (30 pages)
Table of Contents
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CU50
Service Manual
Introduction:
This ice machine is the result of Scotsman's
decades of experience as an industry leader in the
design and manufacture of both commercial and
residential ice machines.
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
Cabinet Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
Door Covering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
Door Panel Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
Custom Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
Door swing change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
Gravity Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12
Harvest Time Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14
Control Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16
How to clean the condenser and winterize. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17
How to remove scale from the ice making system. . . . . . . . . . . . . . . . . . . . . . . . Page 18
System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 19
Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22
Performance Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 23
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24
Thermistor Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 25
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 26
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27
Removal and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28
Removal and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29
Removal and Repair - Cabinet Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 30
Refrigeration Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32
Table of Contents
March 2010
This manual includes the information needed to
install, start up, maintain and service the ice
machine. Note any Caution or Warning indicators,
as they provide notice of potential hazards. Keep
this manual for future reference.
Page 1
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Table of Contents
Related Manuals for Scotsman CU50
Summary of Contents for Scotsman CU50
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Page 1: Table Of Contents
CU50 Service Manual Introduction: This ice machine is the result of Scotsman’s decades of experience as an industry leader in the design and manufacture of both commercial and residential ice machines. Specifications ......... . Page 2 Cabinet Layout . -
Page 2: Specifications
CU50 Service Manual Specifications This ice machine is designed to be used in a controlled environment. It can be used in a wide variety of environmental conditions and under limited conditions (see user manual), outdoors, but there are limits. Use outside of the listed limitations is misuse and will void the warranty. -
Page 3: Cabinet Layout
CU50 Service Manual Cabinet Layout 98.55 FLOOR D R AIN A C CESS HOLE 3.88 443.23 17.45 377.95 14.88 753.24 29.66 97.79 3.85 AIR OUT AIR IN 606.68 23.89 566.17 22.29 40.51 1.60 81.28 3.20 ADJUS TMENT [25.40] 1.00 March 2010 Page 3 873.25... -
Page 4: Air Flow
Restricting the airflow will adversely affect the ability of the ice machine to make ice. Warm Air Out Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the standards of agencies like U.L. -
Page 5: Water Quality
To keep the machine operating properly, these impurities or minerals will have to be regularly dissolved by an acid cleaning, using Scotsman Ice Machine Scale Remover. Directions for this may be found in the section under cleaning. -
Page 6: Door Swing Change
CU50 Service Manual Door swing change The door can be attached to open with hinges on the left or right. Retain all screws for re-use. To change: 1. Remove top hinge pin from hinge. 2. Tilt top of door away from cabinet and lift door off bottom hinge. - Page 7 CU50 Service Manual Installation Notes Sealing to floor: In some cases the base of the ice machine must be sealed to the floor to meet local code. Food grade silastic sealant such as Scotsman part number 19-0529-01 is recommended. Place the machine in the intended location. Turn the leg levelers in until the bottom of the unit is as close to the floor as possible.
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Page 8: Installation: Water & Drain
2. Route the plastic drain tube from the back of the unit to the drain connection point. IMPORTANT NOTE: Often an air gap is required by local codes between the ice maker drain tube and the drain receptacle. Back View, Drain Pump Model... -
Page 9: Gravity Drain
CU50 Service Manual Gravity Drain Caution: Restrictions in the drain system to the machine will cause water to back up into the ice storage bin and melt the ice. Gravity drain tubing must be vented, have no kinks and slope to the building drain. -
Page 10: Electrical
Do not use extension cords. Follow all codes. Connect the machine to its own 115 volt, 15 amp circuit. 1. If the electrical outlet for the ice maker is behind the unit, plug in the unit. 2. Position the unit in the installation opening. -
Page 11: Cube Size Adjustment
CU50 Service Manual Cube Size Adjustment The cube size can be adjusted by changing the amount of freeze cycle time. This is done by a button press sequence. Note: There is only one correct cube size. See the illustrations. To adjust cube size: 1. -
Page 12: Harvest Time Adjustment
CU50 Service Manual Harvest Time Adjustment The harvest time can be adjusted so that all the ice harvests during the cycle, plus a few seconds extra. This is done by a button press sequence. Note: Do not set harvest time shorter than the actual time it takes to release all the cubes. -
Page 13: Control Settings
CU50 Service Manual Control Settings Automatic water purge enable / disable The control is set at the factory to automatically select the proper amount of water purge. If desired, that can be disabled, and a typical purge amount used. To disable Automatic purge selection: 1. -
Page 14: Use
CU50 Service Manual No special instructions are needed for use. Just take as much ice as you need, the machine will replace it. A scoop is provided, and it can be stored in the machine using the loop of tubing on the right side as a holder. -
Page 15: How To Clean The Condenser And Winterize
CU50 Service Manual How to clean the condenser and winterize. Condenser cleaning The condenser is like the radiator on a car, it has fins and tubes that can become clogged with dirt and lint. To clean: 1. Remove the kickplate and front service panel. -
Page 16: How To Remove Scale From The Ice Making System
3. Press and HOLD the both the Clean-Reset and On/Off buttons for 5 seconds. The Time to Clean light will blink on and off. 4. Pour 8 ounces of Scotsman Ice Machine Scale Remover (available from a local Scotsman Distributor or Dealer) into the ice machine reservoir. -
Page 17: System Information
CU50 Service Manual System Information Overall: • Refrigerant: 8 oz R-134a • Compressor: Hermetic, 1300 BTUH, • Condenser: Forced draft • Fan blade: 5 blade, 7 inch • Evaporator: Inverted, 24 cube cells. Copper cups attached to continuous serpentine •... -
Page 18: Water System
CU50 Service Manual Water System The controller uses a Water Sensor to check for the presence of water in the reservoir and to measure the conductivity of the water. The water sensor consists of two stainless steel probes located in a holder next to the water pump. -
Page 19: Components
CU50 Service Manual Components Model and Serial Tag Location Scoop and Thermostat Bracket Control Panel, Bin Light and Curtain Evaporator Platen Evaporator and Controller Inlet Water Solenoid Valve Condenser and Bin Thermostat March 2010 Page 19... -
Page 20: Controller
CU50 Service Manual Controller High Evaporator Voltage Thermistor Connector Hot Gas Power Supply Connector The controller is located at the front of the unit, under the top panel. It is powered by a 12 volt transformer. It has 5 indicator lights: •... -
Page 21: Performance Information
CU50 Service Manual Performance Information Freeze Cycle, Minutes 37-38 36-37 36-35 Water 32-33 Temperature 27-28 20-21 18-19 Harvest Cycle, Seconds 80 -100 55-60 70 - 80 65-75 Water Temperature 50 - 70 70-80 40 - 50 100-120 Total Cycle, Minutes... -
Page 22: Refrigeration System
CU50 Service Manual Refrigeration System 1 50 1 40 1 30 1 20 1 1 0 1 00 Suction Pressure Time Discharge Pressure Time March 2010 Page 22... -
Page 23: Thermistor Values
CU50 Service Manual Thermistor Values Deg. F · Ohms Deg. F · Ohms 0· · · · 85325 52 · · · 18873 1· · · · 82661 S3 · · · 18381 54 · · · 17903 2· · · · 80090 3·... -
Page 24: Service Diagnosis
CU50 Service Manual Service Diagnosis No Ice Problem Likely Cause No power to unit Power disconnected No power to controller Transformer open Control panel failure Switch open Shut down on maximum water fill time - water light Water shut off... - Page 25 CU50 Service Manual Service Diagnosis Makes excessive noise Problem Likely Cause Blade is bent Fan blade vibrates Fan motor mount is broken Compressor vibrates Mounting loose Water pump vibrates Pump bearings worn Panels vibrate Mounting screws loose Makes ice, does not harvest...
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Page 26: Removal And Repair
CU50 Service Manual Removal and Repair Bin Thermostat 1. Disconnect electrical power. Electrical Shock Hazard. Disconnect electrical power before beginning removal 2. Remove service panel. 3. Remove back panel. Note: If unit is built in it must be pulled out to change the bin thermostat. -
Page 27: Removal And Repair
CU50 Service Manual Removal and Repair Evaporator Thermistor Note: If unit is built in it must be pulled out to change the evaporator thermistor. Electrical Shock Hazard. Disconnect electrical power before beginning removal 1. Shut machine off. If unit was making ice, manually harvest the ice. -
Page 28: Removal And Repair - Cabinet Removal
CU50 Service Manual Removal and Repair - Cabinet Removal Certain components require the removal of the cabinet for repair access. 1. If the machine is in a freeze mode, perform a manual harvest. 2. Remove all ice. 3. Drain reservoir. - Page 29 CU50 Service Manual 18. Remove two screws holding freezing compartment brace to cabinet, lift brace up. 19. Lift evaporator platen up and tilt back enough for bin assembly to clear the base. 20. Remove air baffle. 21. Unplug 7 wire harness connector (at back of bin).
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Page 30: Refrigeration Service
CU50 Service Manual Refrigeration Service This ice machine use R-134a type refrigerant. There are specific rules for handling that refrigerant. To check for system pressures, add a field supplied clamp-on type service valve as a temporary means of system access. After diagnosis and before final...
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