Scotsman FME800 Service Manual
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Scotsman FME800 Service Manual

Scotsman fme800 ice machine: user guide
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INTRODUCTION
To the owner or user: The service manual you are
reading is intended to provide you, and the
maintenance or service technician, with the
information needed to install, start up, clean,
maintain, and service this ice system.
This is a modular ice system that fits a variety of
Scotsman ice storage bins.
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAMPLE BIN AND MACHINE COMBINATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
OPERATION: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
REMOVAL AND REPLACEMENT: Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . . . . . . . . 25
REMOVAL AND REPLACEMENT: Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
REMOVAL AND REPLACEMENT: Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
REFRIGERATION SERVICE: HP62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
CIRCUIT BOARD TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.
This manual was printed on recycled paper.
Keep this manual for future reference.

Table of Contents

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NME650 & FME800
It features: front service for the freezer, gearmotor,
control box, water reservoir, and bin control; an
electronic circuit for monitoring ice and water level;
a thermostatic expansion valve; and HP62 as the
refrigerant.
Note this symbol when it appears.
It is an alert for important safety
information on a potential hazard.
Page 1

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Summary of Contents for Scotsman FME800

  • Page 1: Table Of Contents

    This is a modular ice system that fits a variety of Scotsman ice storage bins. FOR THE INSTALLER ......... . . 2 SAMPLE BIN AND MACHINE COMBINATIONS .

  • Page 2: For The Installer

    NME650 & FME800 FOR THE INSTALLER These machines fit the following Scotsman products, check sales literature for other possible combinations: B90 and extensions (with bin top KBT18) HTB555 or BH550 using bin top KBT14 or KBT20 BH800 using bin top KBT15 (one unit).

  • Page 3: Sample Bin And Machine Combinations

    NME650 & FME800 SAMPLE BIN AND MACHINE COMBINATIONS FME800 ON BH550* NME650 ON BH800* The Nameplate is located on the back of the machine. FME800 ON BH900* *Bin Top Kit Required February 1997 Page 3...

  • Page 4: For The Installer

    2. Remove the 2 service panels that will face each other. 3. Add a strip of gasket, such as Scotsman part number 19-0503-04, to the 2 base edges that will face each other and around service panel space on the 2 panels that will face each other.
  • Page 5 NME650 & FME800 FOR THE INSTALLER: Location DO NOT STACK ANYTHING IN FRONT OF THE MACHINE(S) TWO UNITS ON ONE BIN ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS February 1997 Page 5...

  • Page 6: For The Plumber

    NME650 & FME800 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled Models: The recommended water supply is clean, cold water. Use 3/8" O.D. copper tubing, connect to the 3/8" male flare at the back of the cabinet. Install a hand valve near the machine to control the water supply.

  • Page 7: For The Electrician

    The machine requires a solid chassis to earth ground wire. WATER COOLED AIR COOLED NME650 & FME800 The ice maker should be connected to its own electrical circuit so it would be individually fused. Voltage variation must remain within design limitations, even under starting conditions.

  • Page 8: Final Check List

    NME650 & FME800 FOR THE INSTALLER 1. Is the ice system installed indoors in a location where the air and water temperatures are controlled, and where they do not exceed the design limitations? 2. Is there an electrical service disconnect within...

  • Page 9: Start Up

    9. Fill out the manufacturers registration card, and mail it to the Scotsman Factory. 10. Fill out the field quality audit form, and mail it to the Scotsman factory.

  • Page 10: Component Description

    NME650 & FME800 COMPONENT DESCRIPTION Control Box: Contains the electrical controls that operate the machine. High Pressure Cut Out Switch: A manual reset switch sensing the high side refrigeration pressure. It is set to shut the machine off if the discharge pressure should ever exceed 450 psig.
  • Page 11 CUT OUT SWITCH POTENTIAL RELAY TRANSFORMER CIRCUIT BOARD NME650 & FME800 The loads include: Compressor contactor Fan motor Auger drive motor Low Pressure Cut Out Switch A manual reset control that shuts off the ice machine when the low side pressure drops below a preset point, 0-4 psig.
  • Page 12 NME650 & FME800 COMPONENT DESCRIPTION Evaporator: A refrigerated vertical tube filled with water and containing a water seal and auger. Auger: A solid stainless steel double spiral auger, it pushes the ice crystals up to the top of the evaporator.

  • Page 13: Electrical Sequence

    15 seconds (bin full). At that point, the bin empty light goes out, and the machine shuts down. NME650 & FME800 Shut Down consists of: The compressor relay opens. The compressor contactor opens...

  • Page 14: Operation

    NME650 & FME800 OPERATION: Water Water enters the machine through the 3/8" male flare at the rear of the cabinet, goes to a strainer and then to the water reservoir which it enters through the float valve. The water then goes out the bottom of the reservoir tank to the bottom of the evaporator.
  • Page 15 Superheat 5 - 7 degrees High Pressure Cut Out 450 PSIG NME650 & FME800 At the evaporator, the refrigerant enters an area of relatively low pressure, where it can easily "boil off" or evaporate. As it evaporates, it absorbs heat from the evaporator and whatever is in contact with it (such as the water inside it).

  • Page 16: Maintenance And Cleaning

    NME650 & FME800 CLEANING & SANITIZING A Scotsman Ice System represents a sizable investment of time and money in any company’s business. In order to receive the best return for that investment, it MUST receive periodic maintenance. It is the USER’S RESPONSIBILITY to see that the unit is properly maintained. It is always preferable, and less costly in the long run, to avoid possible down time by keeping it clean;...
  • Page 17 2. The ice machine senses water level by a probe located in the water reservoir. At least twice a year, the probe should be removed from the reservoir, and the tip wiped clean of mineral build-up.
  • Page 18 NME650 & FME800 MAINTENANCE: Air Cooled Hazardous Moving Parts. Moving fan blade can cause personal injury. Disconnect electrical power before beginning. 5. Clean the air cooled condenser. The air flow on this model is from front to back, so the inside of the machine will have to be available to clean the air cooled condenser.
  • Page 19 4. Remove 4 allen screws holding breaker to evaporator. 5. Pull up to remove auger. NME650 & FME800 After the auger has been removed, allow the auger to dry: if the auger is not bright and shiny, it must be cleaned.

  • Page 20: Service Diagnosis

    NME650 & FME800 SERVICE DIAGNOSIS: Condition - No Ice Being Produced A. Check: Voltage to the unit, restore it if there is none. Compare to the nameplate. B. Check: The master switch, switch ON if off. C. Check: The reset switches, ( high and low pressure): depress and release each switch. If the still does not start, check the high and low side pressures.
  • Page 21 If the no water light is still on, check the circuit board: 1. Unplug the “water sen” connector from the circuit board. 2. Plug “water sen” connector from the Scotsman Electronic Control tester into the circuit board. a. Move the water switch on the tester to “no water” and the no water light on the circuit board should go on.
  • Page 22 NME650 & FME800 SERVICE DIAGNOSIS: Condition - No Ice Produced STATUS: GEARMOTOR OPERATES, COMPRESSOR DOES NOT A. Check the compressor relay. The relay is on the circuit board, if it does not supply power to the contactor coil, the compressor will not run.
  • Page 23 The compressor should pull down to 25 inches of vacuum and hold there for three to five minutes. NME650 & FME800 February 1997 Page 23...

  • Page 24: Removal And Replacement: Bin Controls

    NME650 & FME800 REMOVAL AND REPLACEMENT: Bin Controls BIN CONTROLS (Ice Level Sensors) 1. Disconnect electrical power. CHUTE 2. Remove front panel. 3. Remove control box cover. SLIDE BIN CONTROLS IN 4. Locate ice chute, at the base of the chute, in...

  • Page 25: Removal And Replacement: Bearing And Breaker

    7. Reverse to reassemble: specific tools and materials are required to install properly. a. Add food grade grease such as Scotsman part number 19-0569-01 to the seal area before installing on the auger. b. Check the seal to shaft areas for cuts, or rough spots: none are permitted.

  • Page 26: Removal And Replacement: Auger

    NME650 & FME800 REMOVAL AND REPLACEMENT: Auger Hazardous Moving Parts. Moving auger can cause personal injury. Disconnect electrical power before beginning. To Remove the Auger: Turn off the water to the machine, and unclip the evaporator drain hose, pull it down and drain the evaporator into the bin or a container.

  • Page 27: Removal And Replacement: Water Seal

    4. Place a small bead of food grade silastic sealant (such as 732 RTV or Scotsman part number 19-0529-01) on the area of the auger where the water seal is to be mounted.

  • Page 28: Removal And Replacement: Evaporator

    NME650 & FME800 REMOVAL AND REPLACEMENT: Evaporator To Replace the Evaporator: (Assuming all the steps for removal of the thrust bearing, breaker, auger, and water seal have been performed.) 1. Recover the refrigerant from the ice maker. 2. Unsweat the refrigerant connections: a) At the thermostatic expansion valve outlet.

  • Page 29: Removal And Replacement: Gearmotor

    OUTPUT GEAR ASSEMBLY GEAR CASE Bench test the gearmotor, check for oil leaks, noise, and amp draw. February 1997 Page 29 NME650 & FME800 CENTRIFUGAL SWITCH ROTOR BEARING SEAL D) After replacing parts as required, (if any) reassemble the gearcase.

  • Page 30: Refrigeration Service: Hp62

    Evacuate to 300 microns Recover, reclaim or recycle refrigerant. The method chosen is up to the service company. Any refrigerant placed into a Scotsman ice machine must meet ARI spec 700-88. Reclaim programs are available through most refrigerant wholesalers. Access Valves: To use the access valves: Remove the cap from the stem, use a 3/16"...
  • Page 31 Scotsman also recommends that, at the time of initial start up, gauges not be used. If gauges must be used, don’t always check the high side pressure.

  • Page 32: Circuit Board Testing

    2. Plug “photo trans” and “LED” connectors from the tester into the circuit board. 3. Unplug “water sen” connector from control board. 4. Plug “water sen” connector from Scotsman tester into circuit board. SWITCH TO “FULL” Bin Control a.

This manual is also suitable for:

Nme650

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