FM2400 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 product contains 2 separate ice making systems in one cabinet. The FM2400 is a modular ice system that fits a variety of Scotsman ice storage bins.
FM2400 FOR THE INSTALLER BACK VIEW The FM2400 is designed to fit the following Scotsman Condenser Inlet (W/C): storage bins: 3/8" FPT B590 and extensions (with bin top KBT18) BH800 no bin top required. BH1000 using bin top KBT14. 9.5" 5.25" When installing a new 3" system, check to be sure that you have everything you need before beginning: Correct Bin Correct Ice Machine Correct Bin Top (if required) TOP VIEW All kits, legs, and information required for the specific job. 14.9" 15.8" 18.74" 18.
FM2400 FOR THE INSTALLER: Environmental Limitations Installation Limitations: This ice system is designed to be installed indoors, in a controlled environment: Min Max 0 Air Temperature 50 F 1000F Water Temperature 400F 1000F Water Pressure 20 PSI 80 PSI Voltage -5% +10% (Compared to the nameplate) Operating the machine outside of the limitations is misuse and can void the warranty.
FM2400 FOR THE INSTALLER Location: Typical Storage Bin with Extension and Bin Top After uncrating and inspection, the unit is ready for installation. It is important that the machine be installed in a location where it has enough space around it to be accessible for service, and minimum of 6" be allowed at the back for air circulation on air cooled models. Try to avoid hot, dirty and crowded locations. Be sure that the location for the machine is within the limitations described on page 3.
FM2400 FOR THE INSTALLER: Location ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS DO NOT STACK ANYTHING IN FRONT OF THE MACHINE(S) June, 1989 Page 5
FM2400 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Drains Air Cooled Models: The recommended water supply is clean, cold water. Use 3/8" O.D. copper tubing, and connect to the single 3/8" male flare at the back of the cabinet. This connection supplys water to both ice making systems. Install a hand valve near the machine to control the water supply. Water Treatment: In most areas, a water filter of some type will be useful.
FM2400 FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES The electrical power to the unit is supplied through the junction box at the rear of the machine. Check the nameplate (located on the back panel) for the voltage requirements, and for the minimum circuit ampacity. The machine requires a solid chassis to earth ground wire. The ice maker should be connected to its own electrical circuit so it would be individually fused.
FM2400 FOR THE INSTALLER Final Check List 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? 5. Is there a minimum of 6" clearance at the back of the machine for proper service access and air circulation? 6. Is the water pressure a minimum of 20 psig? 2.
FM2400 START UP Pre-Start Inspection 1. Remove the front and side service panels. 2. Check that the styrofoam shipping blocks have been removed. 3. Inspect the interior of the machine for loose screws or wires. Check that no refrigerant lines are rubbing each other. Check that the fan blade turns freely (air cooled). 4. Check that the unit is installed correctly according to the final check list (page 8). The following procedure applies to each of the two separate ice making systems. Start Up 1.
FM2400 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, and illuminate the reset switch light if the discharge pressure should ever exceed 450 psig.
FM2400 COMPONENT DESCRIPTION: Control Box Contactor: A definite purpose contactor connecting the compressor and the remote condenser fan motor to the power supply. Circuit Board: Controlling the ice machine through sensors and relays. The sensors are for ice level and water level. The relays are for the gear motor (with a built in time delay to clear the evaporator of ice when the unit turns off) and for the liquid line valve. The reset switch is mounted on the circuit board.
FM2400 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. Water Seal: A two part "face" seal, the top half rotating with the auger, the bottom half stationary, the sealing action being where the two seal "faces" meet. Ice Sweep: A plastic cap with "fingers". It revolves with the auger to "sweep" the ice into the ice chute.
FM2400 ELECTRICAL SEQUENCE Refer the wiring diagram as needed. The following description applies to either one of the two ice making systems. They operate independently of each other. If the machine is switched off at the master switch, but is otherwise ready to go, switching the master switch to on does the following: • The bin empty light on the circuit board goes on • There is a 15 second delay • If there is enough water in the reservoir, the circuit board will allow the machine to start up.
FM2400 OPERATION: Water Water enters the machine through the 3/8" male flare at the rear of the cabinet, splits into two separate lines, flows to a strainer at each reservoir and then to each water reservoir which it enters through the float valve. The water then goes out the bottom of the reservoir tanks to the bottom of each evaporator. Reservoir overflow or evaporator condensation is routed to the drain.
FM2400 OPERATION: Refrigeration The following description applies to each of the two separate ice making systems. Beginning at the compressor, the refrigerant 502 is compressed into a high temperature gas. The discharge line directs this gas to the condenser. At the condenser (air or water cooled) the gas is cooled by either air or water and it then condenses into a liquid. This high pressure liquid then goes through the liquid line to the expansion valve.
FM2400 MAINTENANCE AND CLEANING The FM2400 is made up of two separate ice makers; to properly clean and maintain the FM2400, these steps must be followed for both systems. ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// A Scotsman Ice System represents a sizable investment of time and money in any company’s business.
FM2400 MAINTENANCE AND CLEANING The FM2400 is made up of two separate ice makers; to properly clean and maintain the FM2400, these steps must be followed for both systems. ///////////////////////////WARNING///////////////////////////// Disconnect electrical power before beginning. ////////////////////////////////////////////////////////////////////////// 1. The bin control uses devices that sense light, therefore they must be kept clean enough so that they can “see”.
FM2400 MAINTENANCE: Air Cooled 5. Clean each air cooled condenser. Use a vacuum cleaner or coil cleaner if needed. Do NOT use a wire brush. ////////////////////////////WARNING/////////////////////////////// Disconnect electrical power. ///////////////////////////////////////////////////////////////////////////// A. Remove top panel. FAN MOTOR ASSEMBLY TOP PANEL C. Pull fan motor assembly off of locating pins and out of the unit. B. Remove two screws, and unplug the fan motors.
FM2400 MAINTENANCE AND CLEANING: Auger In some areas the water supply to the icemaker will have a great deal of minerals in it, and that will result in an evaporator and ALLEN auger becoming coated with these minerals, SCREWS requiring a more frequent removal than twice per year. If in doubt about the condition of the /////////////WARNING/////////////// evaporator and auger, the auger can be The auger has sharp removed so the parts can be inspected. edges, handle with care.
FM2400 SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: NOTHING OPERATES 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 3 reset switches, (circuit board, high and low pressure): depress and release each switch. If the still does not start, check: the spout switch; the high and the low side pressures. D.
FM2400 SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: NOTHING OPERATES H. Check: The gear motor, if it will not run, the compressor will not run. If no power to it: Check: The indicator lights on the circuit board, the bin empty light should be ON, the no water light should be OFF . 1. If the bin empty and no water lights are off, check the transformer. a. Transformer “load” side should have 12 to 15 volts. If not, check the “line” side. The line side should have between 208-230 volts.
FM2400 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. 1. Check for power at the contactor coil, if none: a. Check for power at the compressor relay at the circuit board. If there is power at the relay, but none at the contactor coil, Check for an open wire between the relay and the contactor. 2.
FM2400 SERVICE DIAGNOSIS: Condition - Low Ice Production STATUS: EVERYTHING IS OPERATING A. Check the air cooled condenser for dirt. Clean as required. Check the head pressure on water cooled. Adjust as required. If the head pressure is very high: 1. Air cooled. Check for high air temperatures, or restrictive air flow. Correct as needed. 2. Water cooled. Check for high water temperatures, or low water pressure. Correct as needed. 3.
FM2400 REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls WATER RESERVOIR 1. Shut off the water supply to the icemaker. 2. Remove front panel and reservoir cover. 3. To remove float only, pry the mounting flanges apart enough to lift one float pivot pin out of the flange hole, and pull float up and out of the reservoir. 4. To remove reservoir, disconnect water inlet compression fitting at reservoir inlet. 5. Remove drain hose from reservoir. 6. Remove evaporator inlet hose from reservoir. 7.
FM2400 REMOVAL AND REPLACEMENT: Bearing And Breaker d. Lift up, and remove breaker/bearing Note: Removal of the auger, water seal, assembly from auger & evaporator. evaporator and gearmotor must begin at the top of the assembly. 6. Service the bearing. Check for rust, rough spots and damage. To Remove the Breaker Bearing Assembly: a.
FM2400 REMOVAL AND REPLACEMENT: Auger //////////////////////////////WARNING//////////////////////////// Disconnect electrical power. Use care when removing the auger: it has very sharp edges. ////////////////////////////////////////////////////////////////////////// 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. 1. The top panel must be removed. 2. Remove ice chute cover. 3. Unscrew ice sweep.
FM2400 REMOVAL AND REPLACEMENT: Water Seal To Remove the Water Seal: (Assuming all steps to remove the auger have been performed.) 1. The gearmotor/evaporator assembly will have to be exposed. 2. Remove the 4 hex head cap screws holding the evaporator to the gearmotor assembly. Lift the evaporator up and off of the gearmotor. 3. Remove the snap ring or wire retainer from the grove under the water seal. To Replace the Water Seal: 1.
FM2400 REMOVAL AND REPLACEMENT: Evaporator ///////////////////////////////////////////////////////////////////////////WARNING////////////////////////////// ////////////////////////////////// Disconnect electrical power before begining removal procedures.
FM2400 REMOVAL AND REPLACEMENT: Gearmotor //////////////////////////////WARNING//////////////////////////// Disconnect Electrical Power Before Begining Removal Procedures.
FM2400 REMOVAL AND REPLACEMENT Note: The gearcase cover, output gear, bearings and output shaft are a pressed together assembly. Replace as a unit. C) Inspect the oil, gears, and bearings. If the oil level and condition is acceptable, quickly check the gears and bearings. They are likely to be fine if the oil is. If there is evidence of water in the oil (rusty bearings and gears; the oil having a creamy white appearance; oil level too high) carefully inspect the bearings and gears.
FM2400 CIRCUIT BOARD TESTING ///////////////////////////////////////////////////////////////////////WARNING////////////////////////////////////////////////////////////////// These procedures require the machine to be connected to the power supply. The voltages of the electronic circuit are very low, but HIGHER VOLTAGES ARE PRESENT IN THE UNIT. Do not touch anything but the tester while the unit is being checked out. Make all connections to the circuit board with the ELECTRICAL POWER OFF.
FM2400 CIRCUIT BOARD TESTING Water Level 1. Unplug “water sen” connector from control board. 2. Plug “water sen” connector from Scotsman tester into circuit board. a. Move “water” switch on tester to No Water position. The No Water light on the circuit board should go ON. If not, replace the circuit board. b. Move the “water” switch on the tester to the Water position. The No Water light on the board should go OFF. If not replace the circuit board. If the light does go off, replace the water level sensor.
