Page 1 Page 1 SERVICE MANUAL TC 180 Electronic counter nugget ice dispenser MS 1000.59 REV.
Page 2 Page 2 TABLE OF CONTENTS Table of contents Specifications page 2 3 GENERAL INFORMATION AND INSTALLATION Introduction Unpacking and Inspection Location and levelling Electrical connections Water supply and drain connections Final check list 5 5 5 5 6 6 OPERATING INSTRUCTIONS Start up Operational checks 7 8 PRINCIPLE OF OPERATION (How it works) Water circuit Refrigerant circuit Mechanical system Operating pressures Components description 11 11 12 13 14 ADJUSTMENT, REMOVAL AND REPLACEMENT PR
Page 3 Page 3 SPECIFICATIONS ELECTRONIC COUNTER NUGGET DISPENSER TC 180 Important operating requirements: MIN - Air temperature 10°C (50°F) - Water temperature 5°C (40°F) - Water pressure 1 bar (14 psi) - Electr. voltage variations fromvoltage rating specified on nameplate -10% MAX 40°C (100°F) 35°C (100°F) 5 bars (70 psi) +10% ice making capacity AIR COOLED MODELS o°C Kg. 150 10 130 21 120 110 100 32 38 90 AMBIENT TEMPERATURE ICE PRODUCED PER 24 HRS.
Page 4 Page 4 SPECIFICATIONS TC 180 - MACHINE SPECIFICATIONS Model Cond. unit TC 180 AS Basic electr. 230/50/1 Finish Air S. Steel Amps Start Amps 3.2 17 Watts 550 Comp. HP 3/8 Electric power cons. Kwh per 24 HR 13 Ice bin cap Water req. lt/24 HR 5 Kg. 150 Nr. of wires 3 x 1.
Page 5 Page 5 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 TC 180 counter nugget ice dispenser. Their ice making systems are thoroughly tested providing the utmost in flexibility to fit the needs of a particular user. NOTE.
Page 6 Page 6 The maximum allowable voltage variation should not exceed -10% and +10% of the data plate rating. Low voltage can cause faulty functioning and may be responsible for serious damage to the overload switch and motor windings. NOTE. All external wiring should conform to national, state and local standards and regulations. WATER DRAIN The recommended drain tube is a plastic or flexible tube with 18 mm (3/4") I.D. which runs to an open trapped and vented drain.
Page 7 Page 7 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. Open the water supply line shutoff valve and give power by moving the main switch, on the power supply line, to the ON position. The GREEN LED will glow to signal that unit is under power. NOTE.
Page 8 NOTE. If, after ten minutes from the compressor start-up, the evaporating temperature has not dropped down to a value lower than -1°C (30°F) the evaporating temperature sensor detects such an abnormal situation and stops consequently the unit operation. In this circustance, the 3rd warning YELLOW LED will blink (Fig.3).
Page 9 E. Check for the correct CUT-OUT and CUT-IN of the float reservoir water level sensors by shutoff the valve on the water supply line. This will cause a gradual decrease of the water level in the float reservoir and as soon as the level gets below the sensors, the flaker stops to operate and the 5thYELLOW warning LED will glow to signal the shortage of water (Fig.5). NOTE.
Page 10 Page 10 NOTE. The ICE LEVEL CONTROL (INFRARED SYSTEM) is independent of the temperature however, the reliability of its detection can be affected by dirt and scale sediment which may deposit directly on the light source and on the receiver. To prevent any possible ice maker malfunction, due to negative affection of the light detector, it is advisable to follow the instructions for the periodical cleaning of the light sensor elements as detailed in the MAINTENANCE AND CLEANING PROCEDURES. G.
Page 11 Page 11 PRINCIPLE OF OPERATION WATER CIRCUIT The water enter in the machine through the water inlet fitting (which incorporates a strainer and it is located at the rear side of the cabinet) and then it goes to the water reservoir flowing through a float valve. NOTE. The presence of the water in the float reservoir is detected by a system of two sensors which operates in conjunction with the P.C. Board.
Page 12 Page 12 When the opposite situation occures, i.e. the condenser temperature gets below the pre-fixed EVAPORATOR CAPILLARY TUBE DISCHARGE LINE COMPRESSOR CONDENSER SUCTION LINE ACCUMULATOR The refrigerant suction or Lo-pressure sets - in normal ambient conditions (21 °C) - on the value of 1 bar (14 psig) after few minutes from the unit start-up. This value can vary of 0.1 or 0.2 bar (1.5÷3 psig) in relation to the water temperture variations influencing the freezer cylinder. NOTE.
Page 13 Page 13 When the gear motor rotating speed is slowed below 1300 r.p.m. from the normal speed of 1400 r.p.m. the Electromagnetic Safety Device transmits an electrical signal to the MICROPROCESSOR to stop immediately the unit operations like it occures for the wrong rotation, with the lighting-up of the 3RD YELLOW WARNING LED. This to relieve from the excessive load all the electrical and mechanical components of the entire Drive System and extend their durability. NOTE.
Page 14 Page 14 COMPONENT DESCRIPTION A. EVAPORATOR TEMPERATURE SENSOR - BLUE 2 POLES CONNECTOR - MANUAL RESET The evaporator sensor probe is inserted into its tube well, which is welded on the evaporator outlet line. It detects the temperature of the refrigerant on the way out from the evaporator and signals it by suppying a low voltage current flow to the P.C. Board Micro-Processor. According to the current received, the microprocessor let the ice maker to continue its operations or not.
Page 15 Page 15 turn, put in rotation a dispensing vane that pushes the ice towards a rectangular opening located in the bottom of the storage bin. Elapsed the dispensing time (5, 10 or 15 seconds according to the setting) or after have removed the glass/carafe, the infrared resume its original condition switching off the dispensing drive motor. G.
Page 16 Page 16 I. FLOAT RESERVOIR The float reservoir consists of a plastic water pan on which is fitted a float valve with its setting screw. The float valve modulate the incoming water flow to maintain a constant water level in the reservoir, level that corresponds to the one in the freezing cylinder to ensure proper ice formation and fluidity. On the inner side of the reservoir cover are fitted the two water level sensors which detects the presence or the shortage of water in the reservoir. NOTE.
Page 17 Page 17 WIRING DIAGRAM AIR AND WATER COOLED 230/50/1 B G N A M GV - WHITE GREY BLACK BLUE BROWN YELLOW GREEN
Page 18 Page 18 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Unit will not run No LED lighted-up Blown fuse in P.C.Board Replace fuse & check for cause of blown fuse Master switch in OFF position Turn switch to ON position Inoperative P.C.Board Replace P.C.
Page 19 Page 19 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Wet ice Ambinet temperature too high Move unit to cooler location High water level in the freezer Lower to approx. 20 mm below ice spout Faulty compressor Replace Water not entering in the freezer Air look in feed line to freezer. Clogged feed line to freezer.
Page 20 Page 20 MAINTENANCE AND CLEANING INSTRUCTION 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 21 4. Shut close the water shutoff valve on water line. Page 21 6. Remove the float reservoir cover and with a piece of copper wire jump the two water level sensors. NOTE. The ice made with the cleaning solution is slushy and coloured also, it may tend to loose fluidity creating some resistence in being elevated and extruded; this situation can be heard by the creacking noise made by the ice.
