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) 35°C (90°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 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. 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. 7. Disconnect the ice level control terminal plug from the P.C. BOARD of Electronic Modular Cuber. 8.
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 During the water filling phase the components energized are: START UP After having correctly installed the ice maker and completed the plumbing and electrical connections, perform the following “Start-up” procedure. A. Give power to the unit to start it up by switching "ON" the power line main disconnect switch. NOTE.
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 F. 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 I. Check the texture of ice cubes just released. They have to be in the right shape with a small depression of about 5-6 mm in their crown. If not, wait for the completion of the second cycle before performing any adjustment. If required, the length of the timed freezing cycle can be modified by changing the DIP SWITCH keys setting as illustrated in OPERATING PRINCIPLE.
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) . Compressor .................................. OPERATION - CONTROL SEQUENCE 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) REFRIGERANT CHARGE (R 404 A) MC 15 MC 45 MC 45 (60 Hz) Air Cooled 640 gr 1300 gr 1040 gr Water Cooled 500 gr 700 gr 560 gr NOTE. Before charging the refrigerant system always check the type of refrigerant and quantity as specified on the individual ice machine dataplate.
Page 23 D. Page 23 P.C. BOARD (Data processor) The P.C. BOARD, fitted in its plastic box located in the front of the unit, consists of two separated printed circuits one at high and the other at low voltage integrated with two fuses one on power in (32mA) and one on power out (6.
Page 24 Page 24 The DIP SWITCH N° 7 and 8 allow the extention of the length of the harvest/defrost cycle according to their combination as per following chart: RED ALARM LED ON Too hi condensing temperature RED ALARM LED BLINKING Too hi evaporating temperature YELLOW FREEZING CYCLE ON Unit in freezing cycle mode DIP SWITCH YELLOW FREEZING LED AND RED ALARM LED ON Condenser sensor out of order YELLOW FREEZING LED AND RED ALARM LED BLINKING Evaporator sensor out of order G.
Page 25 J. 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. Page 27 E. REPLACEMENT OF P.C.
Page 28 3. Trace the electric wires belonging to the hot gas valve coil and disconnect them; then lift the valve coil from the valve body. 4. To install the replacement hot gas valve coil follow previous steps in reverse. I. REPLACEMENT OF WATER DRAIN SOLENOID VALVE 1. Remove the rear panel. 2. Trace and disconnect the electrical leads from the water drain solenoid valve coil. 3. Remove the corbin clamps and the plastic hoses from the valve. 4.
Page 29 3. Remove the evaporator sensor probe taking off the two metal clips securing it to the evaporator serpentine. 4. Recover the refrigerant from the system and transfer it in a container so to reclaim or recycle it. 5. Unsolder and disconnect the capillary tube and hot gas line from one serpentine of evaporator and the suction discharge line from the other serpentine. 6. Lift the evaporator platen assembly out of its seat. NOTE.
Page 30 Page 30 7. To install the replacement evaporator follow the above steps in reverse. 3. Recover the refrigerant from the system and transfer it in a container so to reclaim or recycle it. NOTE. Thoroughly evacuate the system to remove moisture and non condensables after water regulating valve replacement. 4. Unsolder and disconnect both the suction line and the discharge line from the compressor. 5. Remove the four compressor mounting bolts and the compressor from the unit base. NOTE.
Page 31 Page 31 WIRING DIAGRAM MC-15 A-W 230/50/1 - 240/50/1 - 115/60/1 B G N A M GV - WHITE - GREY - BLACK - BLUE - BROWN - YELLOW GREEN
Page 32 Page 32 WIRING DIAGRAM MC-15 A-W 220/50-60/3 - 400/50/3 + N B G N A M GV - WHITE - GREY - BLACK - BLUE - BROWN - YELLOW GREEN
Page 33 Page 33 WIRING DIAGRAM MC-45 A-W 230/50/1 - 240/50/1 B G N A M GV - WHITE - GREY - BLACK - BLUE - BROWN - YELLOW GREEN
Page 34 Page 34 WIRING DIAGRAM MC-45 A-W 220/50-60/3 - 400/50/3 + N B G N A M GV - WHITE - GREY - BLACK - BLUE - BROWN - YELLOW GREEN
Page 35 Page 35 SERVICE DIAGNOSIS SYMPTOM POSSIBLE CAUSE SUGGESTED CORRECTION Unit will not run (No warning LEDS glows) Blown power in 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) Blown power out fuse in P.C.
Page 36 Page 36 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED 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 Remove spray bar & jet bearing and clean them Freezing cycle too long Review setting of DIP SWITCH keys Inoperative evaporator sensor Replace sensor Inefficient compressor Replace Leaky water valve Repair or replace N
Page 37 Page 37 MAINTENANCE AND CLEANING INSTRUCTIONS A. GENERAL 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 38 C. Page 38 CLEANING INSTRUCTIONS OF WATER SYSTEM 1. Remove left, center and right front panels to gain access either to the control box and to the evaporator. 2. Wait till the end of defrost cycle then turn the unit OFF by the main switch (disconnect power supply). 3. Prepare for each freezing chamber the cleaning solution by diluting in a plastic container two or three liters of warm water (45°-50°C) with a 0,2-0,3 liters of SCOTSMAN Ice Machine Cleaner. 5.
Page 39 Page 39 8. With the system in Cleaning mode the water pump is the only component in operation to circulate the cleaning solution in the entire water system 9. Let the unit remain in the cleaning mode for about 20 minutes then turn the main switch to OFF (disconnect unit from POWER) 10.
