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Summary of Contents for Scotsman UF424A-1A
- Page 1 Technical Manual for Model UF424 and UN324...
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Page 2: Table Of Contents
Use a commercial service company. Locate Keep this manual for future reference. one from the Scotsman website: www.Scotsman-ice. Table of Contents Specifications ..................3 Cabinet Drawing . -
Page 3: Specifications
For available options and kits, see sales literature. Water Conductivity: • Minimum:10 micro Siemens/CM Scotsman Ice Systems are designed and RO water may be supplied to the potable water manufactured with the highest regard for safety and system, but if it has less than the above conductivity, performance. -
Page 4: Cabinet Drawing
UF424 / UN324 Technical Manual Cabinet Drawing WATER INLET ACCESS POWER CORD DRAIN September 2017 Page 4... -
Page 5: Plan And Front Views
UF424 / UN324 Technical Manual Plan and Front Views 72.3cm 28.4in 61cm 24.0in 84.7cm 33.4in 99cm 39.0in 50.8cm 20.0in EXHAUST INLET September 2017 Page 5... -
Page 6: Side And Back Views
UF424 / UN324 Technical Manual Side and Back Views 5.3cm 2.08in UTILITY CLEARANCE 72.8cm 28.7in 15.1cm 6.0in 51.4cm 20.3in UNIT DRAIN 3/4" FPT WATER INLET CONDENSER WATER 3/8 FLARE INLET 3/8-18NPT CONDENSOR WATER DRAIN CONNECTION 16.8cm 13.6cm 1/2-14 NPT 11.9cm 6.6in 5.4in 4.7in... -
Page 7: Operational Data
Refrigerant Electrical Charge Maximum Fuse Size Model Condenser (R-134a) or Breaker (Amps) (Volts/Hz/Phase) Ounces Cut Out Cut In UF424A-1A / UN324A-1A 115/60/1 UF424W-1A / UN324W-1A 115/60/1 Water UF424A-6A / UN324A-6A 230/50/1 Model Typical Watts Typical Amps Auger Motor Amps Compressor Amps 560 - 690 6.3 - 7... -
Page 8: Placement
Scotsman. 1. Separate the carton from the shipping pallet Scotsman reserves the right to make design changes 2. Inspect for any hidden shipping damage. If any and/or improvements at any time. -
Page 9: Installation
UF424 / UN324 Technical Manual Installation Note: The building drain inlet must be lower than For the Electrician the drain outlets at the back of the ice machine. This is a cord-connected unit and must be on a The water supply must have a hand shut off valve separate single phase power supply. -
Page 10: Initial Start Up
Fill out the Customer Evaluation and Warranty plate on the ice maker Registration form, and mail it in to Scotsman or register the unit at Scotsman’s website (www. Plumbing connections are complete and scotsman-ice.com). -
Page 11: Maintenance And Cleaning
9. Mix a solution of 1.5qt/1.4L of warm water F/32 C to 110 F/43 C) and 4 ounces of Scotsman Clear 1 Ice Machine Scale Remover. Ice machine cleaner contains acids. Acids can cause burns. If concentrated cleaner comes in contact with skin, flush with water. - Page 12 14. Pour clean water into the bin to melt any ice produced during the cleaning cycle. 1. Use the same cleaning mixture to thoroughly 15. Mix a solution of 4oz/118ml of Scotsman Clear clean bin surfaces. 1 ice machine scale remover and 16oz/473ml of potable water.
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Page 13: Condensers And Air Filter Cleaning
UF424 / UN324 Technical Manual Condensers and Air Filter Cleaning Water cooled equipment may be connected to a Filters and Air Cooled Condenser closed loop recirculating system or to a regular water The air filter located on the lower front grill will capture supply. -
Page 14: Operation
UF424 / UN324 Technical Manual Operation At initial start up there is no ice in the ice storage bin, so there is nothing blocking the infrared sensors that are used to control the on or off mode of the machine. A push of the on off button triggers the controller to begin ice making. -
Page 15: Basic Troubleshooting
UF424 / UN324 Technical Manual Basic Troubleshooting Symptom Possible Cause Probable Correction No ice in bin Unit in off mode or off on Remove front panel and check controller code error code. display. Push ON/OFF button to reset. See pages 16 and 17 for further details. -
Page 16: Controller Functions
UF424 / UN324 Technical Manual Controller Functions All models use the same control system. There is also a code display, the codes are: - - - for off The electronic controller operates the compressor (with fan motor), and auger drive motor, It monitors: - - - for ice making •... -
Page 17: Controller Details
UF424 / UN324 Technical Manual Controller Details The controller has features for the service technician. Some details: • Any auger motor failure is an immediate shut down. Because of the critical nature of that failure there is no auto restart from an auger error. •... -
Page 18: Controller Diagnostics
UF424 / UN324 Technical Manual Controller Diagnostics Code or Light Action Probable Cause Suggested Action Unit manually switched off If desired, switch unit on. Freeze mode None, unit is making ice. Bin sensors sense bin full Check if bin is full. Corrupted memory Replace controller Clean mode... -
Page 19: Electrical Sequence
UF424 / UN324 Technical Manual Electrical Sequence When electrical power is connected, and the prior Timings mode was Off, the controller verifies the voltage and • Status changes from Bin Full to Bin Empty: 10 performs a self check. If the self check confirms the second delay. -
Page 20: Testing Compressor
UF424 / UN324 Technical Manual Testing Compressor The refrigeration system is steady-state. When Capacitor Testing in operation and stabilized, it will maintain nearly Capacitors may be tested using a multimeter, but constant discharge and suction pressures. begin with a visual test. A good indication of a failed Items that can affect that are: capacitor is one that is bulging or leaking. -
Page 21: Replace Compressor
UF424 / UN324 Technical Manual Replace Compressor The compressor can be replaced from the back. Note: Always check electrical information on new compressor to be sure it is the correct voltage and phase. 1. Disconnect electrical power. Electrical Shock Hazard Disconnect electrical power before beginning 2. -
Page 22: Replace Fan Motor
UF424 / UN324 Technical Manual Replace Fan Motor Suggested tools include 1/4 inch drive ratchet set. The fan motor is located behind the front panel. 1. Remove the front panel. Electrical Shock Hazard Disconnect electrical power before beginning 2. Disconnect electrical power. 3. -
Page 23: Testing Sensors
UF424 / UN324 Technical Manual Testing Sensors Photo-Eye Bin Control Replace Photo-Eye Bin Control The sensors consist of an emitter and a receiver. The 1. Remove top panel. emitter shines infrared light in a certain pattern at 2. Disconnect photo eye bin control from the quick the receiver. -
Page 24: Panel Removal
UF424 / UN324 Technical Manual Panel Removal Top Panel Requires back access 1. Remove three thumbscrews holding top panel to back panel. 2. Pull top panel back slightly to release it from the top of the machine, then lift up and off the unit. Note: Upper brace may come with top panel, it is not attached to the unit. -
Page 25: Remove Ice Storage Bin
UF424 / UN324 Technical Manual Remove Ice Storage Bin Replacement of these components requires removal 12. Push chute cover back and remove. of the ice storage bin. 13. Unscrew ice sweep and remove. • Water Seal • Bottom Bearing Ice Chute Ice Sweep •... -
Page 26: Remove Gear Reducer
UF424 / UN324 Technical Manual Remove Gear Reducer Removal 6. Remove four 1/2” hex head bolts securing evaporator assembly to gear reducer cover. Note: Below steps assume the bin has been removed. Remove or melt out all ice. 1. Disconnect electrical power to unit. Electrical Shock Hazard Disconnect electrical power before beginning... -
Page 27: Remove Auger
UF424 / UN324 Technical Manual Remove Auger Auger A reversed motor code (1) is a strong symptom of a motor that should be replaced. The auger must be clean and undamaged to work properly. Removal Remove it from the evaporator to confirm. Suggested tools include a 1/4 inch drive ratchet set. -
Page 28: Replace Evaporator
UF424 / UN324 Technical Manual Replace Evaporator 1. Disconnect electrical power 6. Un-braze the evaporator refrigerant inlet and outlet. 7. Lift the evaporator up and off the bottom bearing retainer. The stationary half of the water seal will Electrical Shock Hazard be in the bottom of the tube. -
Page 29: Replace Auger Motor
UF424 / UN324 Technical Manual Replace Auger Motor Auger Motor The auger motor may be replaced without removing the gear reducer. Due to manufacturing and testing reasons, the replacement auger drive motor is supplied mounted on a gear reducer cover. It is not necessary to replace the gear reducer cover. -
Page 30: Prep To Replace Water Seal Or Bearings
UF424 / UN324 Technical Manual Prep to Replace Water Seal or Bearings It is the manufacturer’s recommendation that the top 7. Remove four 1/4 inch hex socket head socket bearing, bottom bearing and water seal be replaced at screws. the same time. Extruder / Breaker Electrical Shock Hazard Disconnect electrical... -
Page 31: Replace Water Seal And Auger Bearings
UF424 / UN324 Technical Manual Replace Water Seal and Auger Bearings Water Seal Top Bearing: 1. Go thru all steps to remove the auger. 1. Go thru the process of removing the extruder breaker. 2. Remove the 4 allen head screws at the bottom of the evaporator. -
Page 32: Replace Electrical Components
UF424 / UN324 Technical Manual Replace Electrical Components General Access Power Cord 1. Disconnect electrical power. 1. Disconnect power 2. Remove front, top and right side panels. 3. Pull control box out all the way. 4. Remove power leads from contactor. Electrical Shock Hazard 5. -
Page 33: Schematic Diagram
UF424 / UN324 Technical Manual Schematic Diagram September 2017 Page 33... -
Page 34: Wiring Diagram
UF424 / UN324 Technical Manual Wiring Diagram September 2017 Page 34... - Page 35 SCOTSMAN ICE SYSTEMS 101 Corporate Woods Parkway Vernon Hills, IL 60061 800-726-8762 www.scotsman-ice.com...
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