Scotsman CU1526 Service Manual
Hide thumbs
Also See for CU1526:
- User manual (18 pages) ,
- Installation manual (77 pages) ,
- User manual (2 pages)
Table of Contents
Advertisement
Quick Links
Introduction
The design of this cuber is the result of years of
experience and testing. Standard features include
a removable bin for service and an on-off switch at
the front of the cabinet for easy operational control.
Installation: Product Specifications . . . . . Page 2
Model Number Description. . . . . . . . . . Page 3
Water . . . . . . . . . . . . . . . . . . . . . Page 4
CU1526 and CU2026 Cabinet Layout . . . . Page 5
CU3030 Cabinet Layout . . . . . . . . . . . Page 6
Bin Removal . . . . . . . . . . . . . . . . . Page 7
Plumbing Requirements . . . . . . . . . . . Page 8
Electrical . . . . . . . . . . . . . . . . . . . Page 9
Adjustments . . . . . . . . . . . . . . . . . Page 10
Use and Operation . . . . . . . . . . . . . . Page 11
Control Switches . . . . . . . . . . . . . . . Page 12
Cuber System Information . . . . . . . . . . Page 13
Controller Information . . . . . . . . . . . . Page 14
Component Indicator Light Table . . . . . . Page 15
How It Works - Air Cooled . . . . . . . . . . Page 16
How It Works - Water Cooled . . . . . . . . Page 17
Electrical Component Details . . . . . . . . Page 20
Electrical Component Details - continued . . Page 21
Control Operation . . . . . . . . . . . . . . Page 23
Control Safeties . . . . . . . . . . . . . . . Page 24
Restarts . . . . . . . . . . . . . . . . . . . Page 25
Control Button Use . . . . . . . . . . . . . . Page 26
Test Mode: . . . . . . . . . . . . . . . . . . Page 27
Service Diagnosis . . . . . . . . . . . . . . Page 28
Service Diagnosis . . . . . . . . . . . . . . Page 29
Service Diagnosis . . . . . . . . . . . . . . Page 30
Note any Caution or Warning symbols when they
appear on the product or in this manual. They
indicate potential hazards.
Table of Contents
Cleaning, Sanitation and Maintenance . . . Page 32
Test Procedures - Sensors . . . . . . . . . Page 34
Sensor Testing . . . . . . . . . . . . . . . . Page 35
Thermistors . . . . . . . . . . . . . . . . . Page 36
Test Procedures - Loads . . . . . . . . . . . Page 37
Test Procedures . . . . . . . . . . . . . . . Page 38
Technical Information . . . . . . . . . . . . Page 41
Performance Data, CU1526 . . . . . . . . . Page 42
Performance Data, CU2026 . . . . . . . . . Page 43
Performance Data, CU3030 . . . . . . . . . Page 44
Page 51
Page 52
Removal and Replacement . . . . . . . . . Page 53
May 2008
Page 1
CU1526, CU2026, CU3030
Service Manual
Advertisement
Table of Contents
Related Manuals for Scotsman CU1526
Summary of Contents for Scotsman CU1526
-
Page 1: Table Of Contents
Electrical ....Page 9 Performance Data, CU1526 ..Page 42 Adjustments ....Page 10 Performance Data, CU2026 . -
Page 2: Installation: Product Specifications
CU1526, CU2026, CU3030 Service Manual Installation: Product Specifications Location Limitations: Environmental Limitations The product is designed to be installed indoors, in Minimum Maximum a controlled environment. Air cooled models discharge very warm air into the room. Water temperature cooled models discharge warm water into the building’s drain. -
Page 3: Model Number Description
• and performance. CU2026SA-1A • C= cuber Scotsman assumes no liability of responsibility of • U=under the counter type any kind for products manufactured by Scotsman • 20= nominal ice capacity in 10s of pounds that have been altered in any way, including the •... -
Page 4: Water
Testing has shown that using a filter that does not remove chlorine, such as the Scotsman Aqua Patrol, will greatly improve this situation, while the ice making process itself will remove the chlorine from the ice, resulting in no taste or odor impact. -
Page 5: Cu1526 And Cu2026 Cabinet Layout
CU1526, CU2026, CU3030 Service Manual CU1526 and CU2026 Cabinet Layout POTABLE 39.5 WATER INLET 15.55 3/8 FLARE COND DRAIN 1/2 NPT (W/C ONLY) COND WATER REGULATOR 76.3 3/8 NPT 30.04 (W/C ONLY) DRAIN 3/4 FPT 5.92 4.32 POWER CORD 3.19 2.60... -
Page 6: Cu3030 Cabinet Layout
CU1526, CU2026, CU3030 Service Manual CU3030 Cabinet Layout POTABLE 60.5 WATER INLET 23.82 3/8 FLARE COND DRAIN 1/2 NPT (W/C ONLY) COND WATER REGULATOR 3/8 NPT 74.6 (W/C ONLY) 29.36 DRAIN 3/4 FPT 17.7 6.99 4.33 POWER CORD 3.19 2.77 11.8... -
Page 7: Bin Removal
CU1526, CU2026, CU3030 Service Manual Bin Removal The ice storage bin is removable to allow access to the refrigeration system for service. 1. Remove front louvers. Remove left then right. 2. If the machine is in an ice making mode, push and release the Manual Harvest button to release any ice that might be on the evaporator. -
Page 8: Plumbing Requirements
CU1526, CU2026, CU3030 Service Manual Plumbing Requirements All models require connection to cold, potable Note: This NSF listed model has a 1" anti-back flow water. A hand actuated valve within sight of the air gap between the float valve orifice and the machine is required. -
Page 9: Electrical
CU1526, CU2026, CU3030 Service Manual Electrical The machine is supplied with a power cord. This is a cord-connected unit, and must be on a separate power supply. Check the dataplate for the voltage, ampacity and maximum fuse size and per the dataplate use fuses or HACR circuit breakers. -
Page 10: Adjustments
CU1526, CU2026, CU3030 Service Manual Adjustments Bridge Thickness - For the Service Tech Only 1/8-3/16" 1. Remove left louver, locate controller on and off bridge switches. 2. Push and hold Off till the machine stops. 3. Remove curtain. 4. Use a hex wrench and rotate the bridge thickness adjustment screw in 1/8 turn increments CW to increase bridge thickness. -
Page 11: Use And Operation
105-110 degrees F. If the De-Scale light is on, the machine has Adjust if necessary. determined that it needs to be cleaned. Contact an authorized Scotsman service agent and have the machine cleaned, de-scaled and sanitized. May 2008 Page 11... -
Page 12: Control Switches
CU1526, CU2026, CU3030 Service Manual Control Switches There is a front on and off switch, located in the top center of the louvers. Switching this switch Off will immediately stop the machine. Switching it back on Power Status Water De-scale will cause the machine to start in a timed harvest cycle. -
Page 13: Cuber System Information
CU1526, CU2026, CU3030 Service Manual Cuber System Information Overall System Type: • Refrigeration: Mechanical, either air cooled or water cooled • Water System: Inlet water float valve fills reservoir continuously. Purge solenoid valve opens to discharge some reservoir water once per cycle. -
Page 14: Controller Information
CU1526, CU2026, CU3030 Service Manual Controller Information Machine Indicator Lights • Power • Status • Water • Clean Code Display Main codes - automatically displayed ..Freeze Cycle flashes..Freeze Cycle is Pending . -
Page 15: Component Indicator Light Table
CU1526, CU2026, CU3030 Service Manual Controller Information Component Indicator Lights • Condenser Fan / Aux • Water Pump • Purge Valve • Water Solenoid • Hot Gas • Compressor • Ready to Harvest • Sump Empty • Sump Full •... -
Page 16: How It Works - Air Cooled
CU1526, CU2026, CU3030 Service Manual How It Works - Air Cooled Freeze Cycle. At start up the controller operates the water pump and purge valve to drain the reservoir. The float valve refills the reservoir after the purge valve shuts off. When the reservoir has filled, the compressor and water pump start. -
Page 17: How It Works - Water Cooled
CU1526, CU2026, CU3030 Service Manual How It Works - Water Cooled Freeze Cycle. At start up the controller operates the water pump and purge valve to drain the reservoir. The float valve refills the reservoir after the purge valve shuts off. When the reservoir has filled, the compressor and water pump start. -
Page 18: Electrical Sequence - Air Or Water Cooled
CU1526, CU2026, CU3030 Service Manual Electrical Sequence - Air or Water Cooled Power connected, unit previously switched Off. Control board does a self check. If the self check fails, the unit displays an E and no further action will occur. - Page 19 CU1526, CU2026, CU3030 Service Manual Electrical Sequence - Air or Water Cooled (continued) Indicator Information: The display shows a non-blinking H. The Power and Status Lights will be Green. The compressor, hot gas valve and one or two curtain switch lights will be ON. After a few seconds the water pump, purge valve and inlet water valve lights will come on.
-
Page 20: Electrical Component Details
CU1526, CU2026, CU3030 Service Manual Electrical Component Details Compressor • Operated by the compressor contactor. Uses PTCR and run capacitor. Contactor • Operated by the controller and the high pressure cut out switch. Line voltage coil. When energized the Compressor indicator light will be ON. -
Page 21: Electrical Component Details - Continued
CU1526, CU2026, CU3030 Service Manual Electrical Component Details - continued Hot Gas Valve • Operated by the controller in parallel with the harvest assist solenoid. Cycles on and off at the beginning of a restart. Energized throughout the harvest cycle. Line voltage coil. -
Page 22: Refrigeration & Water Systems
CU1526, CU2026, CU3030 Service Manual Refrigeration & Water Systems Refrigerant: R-404A Compressor: Copeland or Tecumseh hermetic by model Expansion valve: Non adjustable, internally equalized Hot gas valve: Pilot operated, line voltage coil. Condensers: Forced draft air, counterflow water. All air cooled models have left side air inlet. All air cooled models exhaust air out the right front. -
Page 23: Control Operation
CU1526, CU2026, CU3030 Service Manual Control Operation Standard control: • Electronic controller operating from a 12 AC volt power supply. Will operate within a voltage range between 10 and 15.5. • Indicator lights, four visible on outside of control box: Power, Status, Water, De-scale/Sanitize. -
Page 24: Control Safeties
CU1526, CU2026, CU3030 Service Manual Control Safeties Max freeze time – 84 minutes When exceeded, the controller will attempt another freeze cycle. If the next cycle's freeze time is less than maximum, the control will continue normal ice making. If the next freeze cycle was too long, the control will again attempt another freeze cycle. -
Page 25: Restarts
CU1526, CU2026, CU3030 Service Manual Restarts Power Interruption The controller will automatically restart the ice machine after adequate voltage has been restored. This also occurs after the on-off switch has been cycled. • H blinks on code display • Status indicator light blinks •... -
Page 26: Control Button Use
CU1526, CU2026, CU3030 Service Manual Control Button Use (from standby - status light off) Set purge level, 1-5 (1 is minimum, 5 is maximum) or Automatic: • Hold off button in for 3 seconds. Release. • Press and release the On button to cycle through and select one of the five purge settings or to use the Automatic setting. -
Page 27: Test Mode
CU1526, CU2026, CU3030 Service Manual Test Mode: • Depress Off for 3 seconds, release. Then depress Clean for 3 seconds. • At 30 seconds the WP will turn on. You will be able to see and hear the water running over the plate. -
Page 28: Service Diagnosis
CU1526, CU2026, CU3030 Service Manual Service Diagnosis No ice Problem Likely Cause Probable Solution Check breaker or fuse. Reset or No power to unit Power disconnected replace, restart and check Transformer open Replace transformer No power to controller ON-OFF Switch open or set at OFF... -
Page 29: Service Diagnosis
CU1526, CU2026, CU3030 Service Manual Service Diagnosis Problem Likely Cause Probable Solution Pump hose disconnected Check hose Check compressor contactor, check controller using test mode Check compressor start components, check PTCR Compressor not operating resistance and temperature Check compressor voltage... -
Page 30: Service Diagnosis
CU1526, CU2026, CU3030 Service Manual Service Diagnosis Problem Likely Cause Probable Solution Ice bridge thickness too small, not Check and adjust if needed enough ice to open curtain Ice bridge thickness too large, ice Check and adjust if needed frozen to evaporator frame... -
Page 31: Service Diagnosis - Low Ice Making Capacity - Air Cooled
CU1526, CU2026, CU3030 Service Manual Service Diagnosis - Low ice making capacity - air cooled Problem Likely Cause Probable Solution Dirty air filter Clean filter Dirty condenser Clean condenser Hot ambient Reduce room air temperature Water leak Check purge valve, check curtain... -
Page 32: Cleaning, Sanitation And Maintenance
Give large amounts of water or milk. Call Physician Be sure all holes are fully open. immediately. Keep out of the reach of children. 6. Pour 8 ounces of Scotsman Clear 1 ice machine scale remover into the reservoir. May 2008 Page 32... - Page 33 CU1526, CU2026, CU3030 Service Manual 10. Push and release the On button to resume ice making. 11. Return the top panel and front louvered panel to their normal position and secure with the original fasteners. Air cooled condenser filter Inspect Orifice Holes 1.
-
Page 34: Test Procedures - Sensors
CU1526, CU2026, CU3030 Service Manual Test Procedures - Sensors All electrical components in this ice machine can be diagnosed with a volt-ohmmeter. Curtain Switch: 1. Test using the controller’s indicator lights. Observe SW1 or SW2. Open and close the curtain. -
Page 35: Sensor Testing
CU1526, CU2026, CU3030 Service Manual Sensor Testing Water Sensor the harness connector) and compare to the resistance in the chart for that temperature. Any The water sensor has two functions, the first is to reading within 1000 ohms is acceptable. -
Page 36: Thermistors
CU1526, CU2026, CU3030 Service Manual Thermistors Deg. F · Ohms Deg. F · Ohms Deg. F. · Ohms Deg. F. Ohms Deg. F. · Ohms 0· · · · 85325 52 · · · 18873 104 · · 5325 156 · · 1819 208 ·... -
Page 37: Test Procedures - Loads
Service Manual Test Procedures - Loads Compressor model was equipped with a potential relay, start capacitor and run capacitor, those should be replaced with the compressor. Most Scotsman service compressors include those parts. Electrical Shock Hazard. Fan motor Use extreme caution while performing 1. -
Page 38: Test Procedures
CU1526, CU2026, CU3030 Service Manual Test Procedures Water Pump Purge valve 1. Test using the controller’s indicator lights. Check 1. Test using the controller’s indicator lights. Shut the indicator light during the freeze cycle. The light unit off by holding the Off button for 3 seconds. - Page 39 CU1526, CU2026, CU3030 Service Manual Test Procedures Compressor contactor switch will re-close and the contactor coil will be energized. 1. Test using the controller’s indicator lights. When the unit is in ice making mode the compressor To Test Fan Pressure Switch: contactor will have power.
- Page 40 CU1526, CU2026, CU3030 Service Manual Test Procedures Controller Hot Gas Valve The controller’s software operation is confirmed if it 1. Test using the controller’s indicator lights. If the is functioning. Execute the test to confirm its unit is running, or has been off for more than 4 operation of the loads.
-
Page 41: Technical Information
Superheat • CU1526 - 20 • CU2026 - 16 F falling during freeze to ~8 • CU3030 - 15 F falling during freeze to ~8 BTUH • CU1526 - 2700 CU2026 - 3700 CU3030 - 4300 September 2010 Page 41... -
Page 42: Performance Data, Cu1526
CU1526, CU2026, CU3030 Service Manual Performance Data, CU1526 CU1526A Ambient Air Temp., Degrees F. Water Temp 22-23 Cycle Time (minutes) End of Freeze 36 - 39 36 - 38 Suction Pressure (PSIG) Harvest 105 - 110 115 - 120 End of Freeze... -
Page 43: Performance Data, Cu2026
CU1526, CU2026, CU3030 Service Manual Performance Data, CU2026 CU2026A Ambient Air Temp., Degrees F. Water Temp 16-17 Cycle Time (minutes) End of Freeze 33 - 34 35 - 36 Suction Pressure (PSIG) Harvest 100 - 105 125 - 130 End of Freeze... -
Page 44: Performance Data, Cu3030
CU1526, CU2026, CU3030 Service Manual Performance Data, CU3030 CU3030A Ambient Air Temp., Degrees F. Water Temp Cycle Time (minutes) End of Freeze 25 - 26 29 - 30 Suction Pressure (PSIG) Harvest 84 - 85 100 - 105 End of Freeze... -
Page 45: Wiring Diagram, Cu1526 And Cu2026 60 Hz Up To Serial Number 12021320013437
CU1526, CU2026, CU3030 Service Manual Wiring Diagram, CU1526 and CU2026 60 Hz up to Serial Number 12021320013437 February 2012 Page 45... -
Page 46: Wiring Diagram, Cu1526 And Cu2026 60 Hz After Serial Number 12021320013437
CU1526, CU2026, CU3030 Service Manual Wiring Diagram, CU1526 and CU2026 60 Hz after Serial Number 12021320013437 February 2012 Page 46... -
Page 47: Wiring Diagram, Cu3030 60 Hz Up To Serial Number Tbd
CU1526, CU2026, CU3030 Service Manual Wiring Diagram, CU3030 60 Hz up to Serial Number TBD February 2012 Page 47... -
Page 48: Wiring Diagram, Cu3030 60 Hz After Serial Number Tbd
CU1526, CU2026, CU3030 Service Manual Wiring Diagram, CU3030 60 Hz after Serial Number TBD February 2012 Page 48... -
Page 49: Wiring Diagram, Cu1526 And Cu2026 50 Hz Up To Serial Number 12021320013437
CU1526, CU2026, CU3030 Service Manual Wiring Diagram, CU1526 and CU2026 50 Hz up to Serial Number 12021320013437 February 2012 Page 49... -
Page 50: Wiring Diagram, Cu1526 And Cu2026 50 Hz After Serial Number 12021320013437
CU1526, CU2026, CU3030 Service Manual Wiring Diagram, CU1526 and CU2026 50 Hz after Serial Number 12021320013437 February 2012 Page 50... -
Page 51: Wiring Diagram, Cu3030 50 Hz Up To Serial Number Tbd
CU1526, CU2026, CU3030 Service Manual Wiring Diagram, CU3030 50 Hz up to Serial Number tbd February 2012 Page 51... -
Page 52: Wiring Diagram, Cu3030 50 Hz After Serial Number Tbd
CU1526, CU2026, CU3030 Service Manual Wiring Diagram, CU3030 50 Hz after Serial Number tbd February 2012 Page 52... -
Page 53: Removal And Replacement
CU1526, CU2026, CU3030 Service Manual Removal and Replacement Water Reservoir CU1526 or CU2026 1. Top access and top panel removal is required for this procedure. 2. Shut water supply OFF. 3. Remove left grill. 4. Push and hold the Off button until the unit stops. - Page 54 CU1526, CU2026, CU3030 Service Manual Removal and Replacement Water Reservoir CU3030 1. Shut water supply OFF. 2. Remove left grill. 3. Push and hold the Off button until the unit stops. 4. Push and hold the Clean button until a - appears in the code display. The pump will drain the reservoir.
- Page 55 CU1526, CU2026, CU3030 Service Manual Removal and Replacement Float valve CU1526 and CU2026 1. Top access and top panel removal will be required for this procedure. 2. Shut water supply Off. 3. Remove two screws and drop the front edge of the reservoir.
- Page 56 CU1526, CU2026, CU3030 Service Manual Removal and Replacement Water Pump CU1526 or CU2026 1. Top access and top panel removal is required for this procedure. 2. Disconnect electrical power. Electrical Shock Hazard. Disconnect electrical power before beginning removal procedure. 3. Shut water supply Off.
- Page 57 CU1526, CU2026, CU3030 Service Manual Removal and Replacement Purge valve 1. Remove left front grill. 2. Push and hold the Off button to shut the machine off. 3. Disconnect electrical power. Electrical Shock Hazard. Disconnect electrical power before beginning removal procedure.
- Page 58 CU1526, CU2026, CU3030 Service Manual Removal and Replacement Fan Blade and/ or Motor 1. Disconnect electrical power. Electrical Shock Hazard. Disconnect electrical power before beginning removal procedure. 2. Go thru all steps to remove the ice storage bin. 3. Unplug fan motor from harness.
-
Page 59: Refrigeration Removal And Replacement Procedures
CU1526, CU2026, CU3030 Service Manual Refrigeration Removal and Replacement Procedures Thermostatic Expansion Valve 1. Remove left front grill. 2. If the machine was in operation, push and release the Harvest button to shut it down. Wait until the harvest cycle has ended so the evaporator has no ice on it. - Page 60 CU1526, CU2026, CU3030 Service Manual Refrigeration Removal and Replacement Procedures Compressor 1. Remove left front grill. 2. If the machine was in operation, push and release the Harvest button to shut it down. Wait until the harvest cycle has ended so the evaporator has no ice on it.
- Page 61 CU1526, CU2026, CU3030 Service Manual Refrigeration Removal and Replacement Procedures 23. Attach compressor terminal cover. 24. Reconnect electrical power. 25. Return bin and all panels to their original positions. Note: If the compressor is being returned for warranty, braze the stubs shut and tag the compressor with the required information.
-
Page 62: Refrigeration Removal And Replacement Procedures
CU1526, CU2026, CU3030 Service Manual Refrigeration Removal and Replacement Procedures 18. Install the harvest assist solenoid. Note location of ejector pin. Adjust position of the evaporator slightly to center the pin in the guide hole of the evaporator. When centered, tighten all evaporator fasteners.