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Table of Contents
Related Manuals for Scotsman AFE325
Summary of Contents for Scotsman AFE325
- Page 1 Flaked and Nugget Technical Training Technical Training Ice Machines...
- Page 2 Presentation Topics Presentation Topics • Section 1: 1/10 HP Flakers – AFE325, AFE400 , MFE400 • Section 2: 1/4 HP Flakers – NME, FME, NSE...
- Page 3 Presentation Topics Presentation Topics • Flaker - Nugget Topics – Component Location – Installation – Construction – Maintenance – Service Diagnosis – Refrigeration Service...
- Page 4 Small Flakers Small Flakers • AFE400 • AFE325 • MFE400...
- Page 5 Small Flakers Small Flakers • Flaked Ice Only – AFE325 and AFE400 are Self Contained – MFE400 is Modular – AFE400 and MFE400 available in air cooled or water cooled configurations – AFE325 is only available as an air cooled model...
- Page 6 Small Flakers Small Flakers • Air Flow In the Front, Out the Sides and Back In the Front, Out the Left Side and Back In and Out the Front...
- Page 7 MFE400 Back View MFE400 Back View Ice Chute Water Evaporator Pressure Switch Water Inlet Gear Box Overflow Drain Hose...
- Page 8 MFE400 Installation MFE400 Installation Shipping Position Assemble Ice Chute with pre-mounted Thermostat...
- Page 9 Small Flaker Refrigeration Small Flaker Refrigeration • Brass Evaporators • R-134a • Cap Tube – AFE325, MFE400 • Expansion Valve – AFE400...
- Page 10 Small Flaker Maintenance Small Flaker Maintenance • Cleaning – Condenser – Water System • Lubrication – Grease Coupling...
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Page 11: Water System Cleaning
Water System Cleaning Water System Cleaning Water System Must Be Cleaned to Remove Mineral Scale... - Page 12 MFE400 Auger Removal MFE400 Auger Removal Remove Screws...
- Page 13 Small Flaker Controls Small Flaker Controls • Electro-Mechanical – Bin Thermostat – Auger Delay Pressure Control – Water Pressure Switch – Centrifugal Switch on Auger Motor...
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Page 14: Typical Wiring Schematic
Typical Wiring Schematic Typical Wiring Schematic Water Thermostat Press. Sw. Cent. Compressor Master Switch Fan Motor Auger Delay Auger Motor... - Page 15 Small Flakers Small Flakers • What could be wrong if the machine has power but will not start? – Open bin thermostat – No water pressure – Open auger motor windings – Any of the above...
- Page 16 Refrigeration Refrigeration • Typical Low Side Operating Pressure: – 7 - 10 PSIG (AFE325) – 12 PSIG (AFE400) – 13 - 14 PSIG (MFE400)
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Page 17: Refrigeration Service
Refrigeration Service Refrigeration Service 134a 134a HFC Leak Detectors HFC Leak Detectors Evacuate to Evacuate to Weigh In Charge 300 microns Weigh In Charge 300 microns Use Nitrogen Purge Use Nitrogen Purge... - Page 18 Small Flaker Summary Small Flaker Summary • One Modular • Two Self Contained • R-134a • Small Auger Drive Motor (1/10 HP) • Electro-Mechanical Controls...
- Page 19 NME Nugget or FME Flake NME Nugget or FME Flake • Condensing Types: – Air Cooled – Water Cooled – Remote Air Cooled – Remote Low Side...
- Page 20 Large Modular Flakers Large Modular Flakers • 21" Wide • 30” Wide • 42" Wide...
- Page 21 ” and 42 ” Wide ” and 42 ” Wide • Right Side View – Service Panel Removed – Right Side Panel May Also Be Removed Auger Motor...
- Page 22 Service Panels Service Panels • Left Side View – Service panel removed – Side panel may also be removed Compressor...
- Page 23 Air Flow Air Flow • Two screws & two snaps hold the front panel on • Cleanable Air Filter • System access ports at the front...
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Page 24: Front View
Front View Front View Evaporator Bail Clamp Evap. Reservoir Drain Control Chute Control... -
Page 25: Installation
Installation Installation • Standard Plumbing Fittings – 3/8" male flare – 3/4" drain • Electrical Junction Box • Options – Water Filters or – Water Treatment... -
Page 26: Utility Connections
Utility Connections Utility Connections • Air Cooled: – Air out the back Electrical Junction Box Water Inlet Water Drain... -
Page 27: Initial Start-Up
Initial Start Up Initial Start Up • Remotes – 4 hour wait after electrical connection for crankcase heater soak out • All others, switch Mode switch to ON – No bin control to install... -
Page 28: Side View
Side View Side View Drain Pan Drain Hose... -
Page 29: Water Reservoir
Water Reservoir Water Reservoir • Float Controlled Water Level • Water Sensor – Shuts unit down when water is gone... - Page 30 Ice Sensors Ice Sensors • Electric Eyes at the base of the Ice Chute Ice Sensor Position...
- Page 31 Slide to Remove Slide to Remove Photo-Eye...
- Page 32 Pressure Cut Outs: Prior Pressure Cut Outs: Prior Push to Reset Prior Manual Reset Prior Manual Reset LPC in the Control...
- Page 33 Pressure Cut Outs: Current Pressure Cut Outs: Current • Automatic Reset – LPC • Cut Out: 15 PSIG • Cut In: 30 PSIG – HPC • Cut Out: 450 PSIG • Cut In: 350 PSIG...
- Page 34 Prior Control System Prior Control System Bin Empty Light is ON When Ice Level is Low...
- Page 35 Prior Control System Prior Control System • The No Water Light is ON when the Water Level in the Reservoir is Low. No Water Light...
- Page 36 Prior Control System Prior Control System • A Tester is Available to Determine if a Sensor or Board Has a Problem. Part Number A33942-001...
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Page 37: Control System
Control System Control System • Use Tester for Ice Sensor Check – Prior - connect at circuit board – AutoSentry - connect tester at ice sensor connections... - Page 38 Current Control System Current Control System AutoSentry Water OK Power OK Service Freeze Bin Full LED1 Compressor Relay LED3 Auger Relay...
- Page 39 AutoSentry Control AutoSentry Control • Indicator Lights – Blinking Light Indicates a Pending Change • Starting • Shutting Down – LED1 and LED3 Lights • Indicate Control Has Powered that Relay’s Coil • Example: LED3 is ON, Auger Motor Should Have Power To It...
- Page 40 AutoSentry Timings AutoSentry Timings • No ice sensed for 10 seconds – Result: Start Up • Ice sensed for 6 consecutive seconds – Result: Shut Down • Unit Shuts Down – Auger Motor Delay runs 1 more minute – Compressor will not restart until 2 minutes have passed since shut down...
- Page 41 Lights On Making Ice Lights On Making Ice AutoSentry Water OK Power OK Freeze LED1 Freeze light blinks during 2 minute Restart Delay. LED3...
- Page 42 Lights On No Water Lights On No Water AutoSentry Water OK Power OK Water OK Blinks Until Auger Motor Shuts Off, Then Then it and LED3 Are OFF LED3...
- Page 43 Supply Interruptions Supply Interruptions • Water – Automatic Restart • After 2 Minute Restart Delay – 2 Minute Timer Starts After Shut Down • Power – Automatic Restart • After 2 Minute Restart Delay – 2 Minute Timer Starts After Power Restoration...
- Page 44 Lights On Auger Motor Stalled Lights On Auger Motor Stalled AutoSentry Water OK Power OK Service Service Light Blinks During the Restart Period Glows Continuously When Board Must be Manually Reset.
- Page 45 Lights On Bin Full Lights On Bin Full AutoSentry Water OK Power OK Bin Full Bin Full Blinks Until the Auger Motor Shuts OFF. Then Bin Full is ON and LED 3 is OFF LED3...
- Page 46 AutoSentry Control AutoSentry Control Water Power Service Freeze Bin Full LED1 LED3 Normal – making ice Normal - Auger Blinking Motor Problem Cut Out Open...
- Page 47 Prior Control System Prior Control System • Water Sensor – Thermistor Probe – Diagnose with Tester – Cannot be used with AutoSentry Board Tip Must Be Clean...
- Page 48 Current Control System Current Control System • Water Sensor – Conductivity Probe – Cannot be used with prior control board – Located in Reservoir – No tester needed • Use ohmmeter or • By-pass to ground Tip Must Be Clean...
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Page 49: Conductivity Probe
Conductivity Probe Conductivity Probe Water • Probe’s Circuit Level – From Control Board Probe – To Probe – To Tip – Through Water – To Evaporator – To Chassis (Ground) – Back to Control Board Evaporator Inlet... - Page 50 Testing Water Sensor Testing Water Sensor Water OK Light on AutoSentry Board Should be ON When Wire is Grounded Wire to Water Sensor from Board Touch to Ground Copper Wire...
- Page 51 Component Removal: Auger Component Removal: Auger • Begin by Removing the Chute Cover...
- Page 52 Changes Changes Chute Insulation Changed to Foam Type Under-Chute Insulation Changed to Foam Type...
- Page 53 Component Removal: Auger Component Removal: Auger • Remove Ice Sweep...
- Page 54 Component Removal: Auger Component Removal: Auger • Remove Breaker Cover (Left Hand Threads).
- Page 55 Component Removal: Auger Component Removal: Auger • Lower Chute and Breaker Cover Removed Auger Stud Breaker to Evaporator Cap Screws...
- Page 56 Component Removal: Auger Component Removal: Auger • Remove the 4 allen- head screws. • Lift up on the breaker and pull the auger out.
- Page 57 Component Removal: Auger Component Removal: Auger • Or, Remove the Auger Stud and then Lift the Breaker Off the Auger.
- Page 58 Breakers: Nugget & Flaker Breakers: Nugget & Flaker • This is a "Flaker" Breaker – Extra "Slotted Collar" – 6 slots for ice...
- Page 59 Nugget Breaker Nugget Breaker...
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Page 60: Water Seal
Water Seal Water Seal Water Seal Top Half of Water Seal... - Page 61 Components Components • With the Auger Removed, the Output Shaft and Bottom Part of the Water Seal Are Visible. Output Shaft...
- Page 62 Auger Auger Drive End, Output Shaft Engages Auger Here...
- Page 63 Construction Construction Refrigerant Tube Evaporator Wall Insulation...
- Page 64 Construction Construction • Gear Case Input Shaft – Change from lip seal to – a Labyrinth type Labyrinth Seal...
- Page 65 Cleaning Cleaning • NEVER Pour Ice Machine Cleaner Directly into the Reservoir! – Mix it: 8 ounces to 3 quarts • Drain Reservoir & Evaporator – Unit OFF, pour cleaning mixture in reservoir – Soak for 15 minutes • Start machine & pour balance of cleaning mixture in the reservoir...
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Page 66: Maintenance
Maintenance Maintenance • Stubborn Stains Must Be Sanded Out – Sand Vertically... - Page 67 Cleaning Cleaning • The Auger Must Be Free of Scale – Wet Auger Might Appear OK – Let it Dry to See Scale...
- Page 68 Breaker & Bearing Breaker & Bearing Grease Bearing Needle part number 02-3559-01 Grease part number A36808-001...
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Page 69: Service Diagnosis
Service Diagnosis Service Diagnosis Symptom Probable Cause Possible Solution Does Not No Water Check Board for Lights and Start Reservoir for Water, Restore Water No Power Check Board for Lights Prior No Lights Check Transformer Current No Check Hi and Low Pressure Lights Cut Outs... - Page 70 Service Diagnosis Service Diagnosis Symptom Probable Cause Possible Solution Does Not Start Bin Controls Dirty Check Board for Bin Full or Empty Light Current: Bin Full Clean Bin Controls Light is OFF Prior: Bin Empty Light is ON...
- Page 71 Service Diagnosis Service Diagnosis Symptom Probable Cause Possible Solution No Ice Auger Motor Will Not Check Service Light on Start AutoSentry Board Service Light Blinking Check Auger for Binding or Steady No Power to Auger Check relay Motor...
- Page 72 Service Diagnosis Service Diagnosis Symptom Probable Cause Possible Solution Auger Motor Compressor OFF Check for Power to ON, No Ice Contactor Coil Check Compressor Prior models, check motor switch Compressor ON Check if auger is turning...
- Page 73 Service Service • Motor and Gear Reducer Kits – Motor Only – or Gear Case with Gears & Oil – or Complete Case & Motor – or Individual Gears – or Case Cover with output shaft – or Case Bottom...
- Page 75 Refrigeration Service Refrigeration Service 404A 404A Liquid Charge Liquid Charge HFC Leak Detectors HFC Leak Detectors Weigh In Charge Weigh In Charge Evacuate to 300 microns Use Nitrogen Purge Evacuate to 300 microns Use Nitrogen Purge...
- Page 76 Summary Summary • Stainless steel augers, evaporators and bearing retainers • Photo-electric eye bin controls • Water level sensor • Double flight auger • Self-aligning top bearing – R-404A refrigerant...