Page 1 Page 1 SERVICE MANUAL MC 15 MC 45 R 404 A VERSION Electronic modular cubers MS 1000.10 REV.
Page 2 TABLE OF CONTENTS Page 2 Table of contents Specifications MC 15 Specifications MC 45 2 3 5 GENERAL INFORMATION AND INSTALLATION Introduction Unpacking and Inspection - Ice maker Unpacking and Inspection - Storage bin Location and levelling Stacking installation Stacking installation - Mixed units Stacking installation - Electronic units Electrical connections Water supply and drain connections Final check list Installation practice 7 7 7 8 8 8 10 11 11 11 12 OPERATING INSTRUCTIONS Start up Ope
Page 3 Page 3 SPECIFICATIONS ELECTRONIC MODULAR CUBER MODEL MC 15 Important operating requirements: Air temperature Water temperature Water pressure Electr. voltage variations from voltage rating specified on nameplate MIN. 10°C (50°F) 5°C (40°C) 1 bar (14 psi) MAX. 40°C (100°F) 40°C (100°F) 5 bars (70 psi) -10% +10% ice making capacity MODÈLES REFROIDIS PAR AIR AIR AIRCOOLED COOLEDMODELS MODELS MODÈLES REFROIDIS PAR EAU WATER COOLED MODELS Kg.
Page 4 Page 4 SPECIFICATIONS ACCESSORIES KSC 11: Cube stacking kit DIMENSIONS: HEIGHT WIDTH DEPTH WEIGHT 499 mm. 1073 mm. 534 mm. 117 Kgs. MC 15 - MACHINE SPECIFICATIONS Model Cond. unit Finish Comp. HP MC 15 AS 6B MC 15 WS 6B Air Water Stainless steel Stainless steel 1.5 Basic electr. 230/50/1N 220-230/50/1 400/50/3N Amps Starts amps. 5.5 7 32 Water req. - lt/24 HR 300 1700* Watts Electric power cons. Kwh x 24 HR N. of wires 1250 25.7 3 x 1.5 m/m2 5 x 1.
Page 5 Page 5 SPECIFICATIONS ELECTRONIC CUBER MODEL MC 45 Important operating requirements: Air temperature Water temperature Water pressure Electr. voltage variations from voltage rating specified on nameplate MIN. 10°C (50°F) 5°C (40°C) 1 bar (14 psi) MAX.
Page 6 Page 6 SPECIFICATIONS ACCESSORIES KSC 11: Cube stacking kit DIMENSIONS: HEIGHT WIDTH DEPTH WEIGHT 860 mm. 1073 mm. 554 mm. 185 Kgs. MC 45 - MACHINE SPECIFICATIONS Model Cond. unit Finish Comp. HP MC 45 AS 6B MC 45 WS 6B Air Water Stainless steel Stainless steel 2.5 Basic electr. 230/50/1N 220-230/50/1 400/50/3N Water req. - lt/24 HR 660 2800* Amps Starts amps. Watts Electric power cons. Kwh x 24 HR N. of wires 10 7 5.5 66 14 2400 50 3 x 1.5 m/m2 5 x 1.
Page 7 Page 7 GENERAL INFORMATION AND INSTALLATION A. INTRODUCTION This manual provides the specifications and the step-by-step procedures for the installation, startup and operation, maintenance and cleaning for the SCOTSMAN MODULAR CUBERS. The Electronic Modular Cubers are quality designed, engineered and manufactured. Their ice making systems are thoroughly tested providing the utmost in flexibility to fit the needs of a particular user.
Page 8 C. LOCATION AND LEVELLING WARNING. This Ice Cuber is designed for indoor installation only. Extended periods of operation at temperature exceeding the following limitations will constitute misuse under the terms of the SCOTSMAN Manufacturer’s Limited Warranty resulting in LOSS of warranty coverage. 1. Position the Bin in the selected permanent location. Criteria for selection of location include: a) Minimum room temperature 10°C (50°F) and maximum room temperature 40°C (100°F).
Page 9 Page 9 5. Put the Electronic Modular cuber on top of the Electromechanical unit securing them by means of the bolts and nuts found in the hardware package supplied with the machine. 10. Connect the electric plug of the ice level control cable to the Cable Extension, then plugin this one into its P.C. BOARD socket. 6. Remove the ice chute from both the unit and insert, through the ice discharge opening of the upper unit, the plastic reinforced Ice Chute Connection. 11.
Page 10 Electronic units installation 1. Unloose the four screws and remove the top panel. Page 10 5. Disconnect the ice level control terminal plug from the P.C. Board of the upper Electronic Modular Cuber (now colled secondary). 2. Remove the two plastic plugs from the upper edges of the two side frames of the bottom unit. 6. Secure the interface P.C. Board to the contactor metal bracket of the lower unit (now called primary) by means of the supplied plastic clamp. 3.
Page 11 11. The interface P.C. Board is now ready to stop simultaneously the operation of the two units when the infrared beam of the ice level control is interrupted by the stored ice cubes. ATTENTION. After removal of the ice cubes both units resume their operation starting from the beginning of freezing cycle.
Page 12 Page 12 4. Have all the electrical and plumbing connections been made, and is the water supply shut-off valve open? 9. Have the bin liner and cabinet been wiped clean? 5. Has the voltage been tested and checked against the data plate rating? 10. Has the owner/user been given the User Manual and been instructed on the importance of periodic maintenance checks? 6. Has the water supply pressure been checked to ensure a water pressure of at least 1 bar (14 psi). 7.
Page 13 Page 13 OPERATING INSTRUCTIONS START UP After having correctly installed the ice maker and completed the plumbing and electrical connections, perform the following “Start-up” procedure. A. Remove the unit front panel and locate the control box. B. Through the control box cover locate the grooved head (similar to a fillister screw hea) of the electronic program selector. With the help of a screwdriver turn the selector head in the OPERATION position. C.
Page 14 Page 14 freezing cycle with the start up of: COMPRESSOR WATER PUMP FAN MOTOR/S (in air cooled version) controlled by the condensing temperature sensor located within the condenser fins (Fig.2).
Page 15 Page 15 H. The ice making process takes place thereby, with the water sprayed into the molds that gets gradually refrigerated by the heat exchange with the refrigerant flowing into the evaporator serpentine. During the freezing process, when the evaporator temperature falls below an established value, to the evaporator temperature sensor supplies a low voltage power signal to the electronic control device (P.C.BOARD) in order to activate an electronic timer.
Page 16 Page 16 NOTE. The length of the entire freezing cycle is governed by the evaporator temperature sensor which has its brobe placed in contact with the evaporator serpentine (Non adjustable) in combination with the electronic timer (Adjustable) incorporated in the P.C. BOARD). The timer adjustment is factory set in consideration of the ice maker model, cooling version and ice cube size (Small, Medium, Large).
Page 17 Page 17 If the ice cubes are shallow and cloudy, it is possible that the ice maker runs short of water during the freezing cycle second phase or, the quality of the supplied water requires the use of an appropriate water filter or conditioner. L. To be sure of the correct operation of ice level control device, place one hand between its sensing "eyes" to interrupt the light beam. The RED LIGHT located in the front of the P.C.
Page 18 Page 18 PRINCIPLE OF OPERATION How it works In the SCOTSMAN Modular Cubers the water used to make the ice is kept constantly in circulation by an electric water pump which primes it to the self propeller spray bar nozzles from where it is diverted into the inverted mold cups of the evaporator (Fig. B). A small quantity of the sprayed water freezes into ice; the rest of it cascades by gravity into the sump assembly below for recirculation.
Page 19 Page 19
Page 20 The electrical components in operation during the freezing cycle are: COMPRESSOR FAN MOTOR (in air cooled version) WATER PUMP CONTACTOR COIL and during the second phase of freezing cycle (Time mode) they are joined by the ELECTRONIC TIMER The refrigerant head pressure, in the course of the freezing cycle, ranges between 18 and 16 bars (250-225 psig) being controlled by the temperature sensor probe located within the condenser fins (air cooled version) or, on the condenser tube coil (water cooled ve
Page 21 Page 21 At the end of the defrost cycle, both the hot gas and the water inlet valves close and the machine starts again a new freezing cycle. TIMED FREEZE Electrical components (Loads) . OPERATION - CONTROL SEQUENCE Compressor .................................. At the start of freezing cycle, the evaporator temperature sensor controls the length of the first part of the freezing cycle. As it reaches a predetermined temperature, it supplies a low voltage current to the P.C.
Page 22 Page 22 Freeze Cycle Average Discharge Pressure A/C: 16÷18 bars (225÷250 psig) Average Discharge Pressure W/C: 17 bars (240 psig) Suction Pressure End Freeze Cycle: 1.6÷1.7 bar (22÷24 psig) This lighting up occures usually in the mid period of the freezing cycle and signals the switching from the first to the second phase of the freezing cycle. NOTE.
Page 23 When the light beam is interrupted the RED LED located in the front of the P.C. BOARD goes off; in case the light beam is constantly interrupted for more than 60 seconds, the ice machine stops with the glowing-up of the 2nd YELLOW LED to monitor the situation of ice bin full. The 60 seconds of delay prevent that an ice scoop movement or the ice dropping through the ice chute (interrupting for a while the light beam) can stop the operation of the unit.
Page 24 Page 24 The DIP SWITCH first four keys setting determines the length of the 2nd phase of freezing TAB. B cycle (controlled by the electronic timer) as detailed in table B. LENGHT OF TIMED PORTION OF FREEZING CYCLE ACCORDINGLY TO THE DIP SWITCH SETTING COMBINATIONS The DIP SWITCH KEYS 5, 6 AND 7 setting determines the length of the defrost cycle according to the ambient temperature sensors as specified in table C. TAB. C LENGHT OF DEFROST CYCLE (IN SEC.
Page 25 I. WATER INLET SOLENOID VALVE 3/4 GAS MALE FITTING The water inlet solenoid valve is activated by the micro processor of the P.C. BOARD during the first 5 minutes of water filling phase and as well during the defrost cycle. When energized it allows a metered amount of incoming water to flow overt he evaporator cavity to assist the hot gas in defrosting the ice cubes.
Page 26 Page 26 ADJUSTMENT, REMOVAL AND REPLACEMENT PROCEDURES A. ADJUSTMENT OF THE CUBE SIZE CAUTION. Before performing actual adjustment of the cube size, check other possible causes for cube size problems, refer to the Service Diagnosis Section for problem review and analysis. Do not perform any adjustment till the icemaking system has progressed through severaÏ complete freezing and harvest cycle, to observe size and quality of ice cubes and whether or not the cube size problem exists. I.
Page 27 B. REPLACEMENT OF EVAPORATOR TEMPERATURE SENSOR (BLUE PLUG) 1. Remove front, left and top panels. 2. Remove the evaporator cover and snap off the two metal clip securing the sensor probe to the serpentine. 3. Trace the evaporator sensor terminal plug on the rear side of the control box and remove it from its socket by carefully pulling out theterminal plug securing clip. 4. To install the replacement evaporator sensor follow the above steps in reverse. C.
Page 28 H. Page 28 REPLACEMENT OF WATER INLET SOLENOID VALVE 3. Remove, by pulling out its holding ring, the electronic timer from its bracket. 1. Close the shut-off valve on the water supply line and disconnect it from the water inlet fitting at the rear of the modular cuber. 4. To install the replacement electronic timer follow previous steps in reverse. 2. Remove the right side panel and disconnect the electrical leads from the solenoid valve. NOTE.
Page 29 Page 29 4. To install the replacement drier remove factory seals and solder the refrigerant lines taking precautions to NOT OVERH EAT the drier body. 5. Thoroughly evacuate the system to remove moisture and non condensable after drier replacement. 6. Charge the system with R 404 A by weight (see data plate of machine) and check for leaks. 7. Replace panel previously removed. O. REPLACEMENT OF HOT GAS VALVE BODY NOTE.
Page 30 Page 30 5. Recover the refrigerant from the system and transfer it in a container so to reclaim or recycle it. NOTE. Always install a replacement drier whenever the sealed refrigeration system is open. Do not replace the drier until all other repairs or replacements have been completed. 6. Unsolder the refrigerant lines from the condenser and remove it from the unit. NOTE. Always install a replacement drier whenever the sealed refrigerafion systern is open.
Page 31 Page 31 WIRING DIAGRAM AIR AND WATER COOLED - SINGLE PHASE B G N A M GV - WHITE - GREY - BLACK - BLUE - BROWN - YELLOW GREEN
Page 32 Page 32 WIRING DIAGRAM AIR AND WATER COOLED - THREE PHASE B G N A M GV - WHITE - GREY - BLACK - BLUE - BROWN - YELLOW GREEN
Page 33 Page 33 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGEST CORRECTION Unit will not run (No warning LEDS glows) Blown fuse in P.C. Board Replace fuse & check for cause of blown fuse Main switch in OFF position Turn switch to ON position Inoperative P.C. Board Replace P.C. Board Loose electrical connections Check wiring (Green LED-Power ON glows) P.C.
Page 34 Page 34 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGEST CORRECTION Irregular cubes size & some cloudy Some jets plugged remove spray bar & jet bearing and clean them Shortage of water See shortage of water Unit not level Level as required Spray bar not rotating and clean them Remove spray bar & jet bearing Freezing cycle too long Review setting of DIP SWITCH keys Inoperative evaporator sensor Replace sensor Inefficient compressor Replace Leaky water valve repair or replace Non
Page 35 Page 35 MAINTENANCE AND CLEANING INSTRUCTIONS A. GENERAL With a pick clean the orifice of the water stream jet that propells the spray bar. The periods and the procedures for maintenance and cleaning are given as guides and are not to be construed as absolute or invariable. Cleaning, especially, will vary depending upon local water and ambient conditions and the ice volume produced; and, each icemaker must be maintened individually, in accordance with its particular location requirements. B.
Page 36 Page 36 WARNING. The SCOTSMAN Ice Machine Cleaner contains Phosphoric and Hydroxyacetic acids. These compounds are corrosive and may cause burns if swallowed, DO NOT induce vomiting. Give large amounts of water or milk, Call Physician immediatelly. In case of external contact flush with water. KEEP OUT OF THE REACH OF CHILDREN 5.
Page 37 Page 37 9. Flush out the cleaning solution from the sump reservoir then pour onto the evaporator cavity two or three liters of clean potable water to rinse the mold cups and the platen. lf necessary remove the water spray bar to clean it separately as per steps 3 and 4 of paragraph B. 10. Turn again the program selector on CLEANING/RINSING. The water pump is again in operation to circulate the water in order to rinse the entire water system. 11.
