Scotsman AC-EC 106 Service Manual
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Scotsman AC-EC 106 Service Manual

Electronic cubers with storage pc board version
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Page 1
AC-EC 106
AC-EC 126
AC-EC 176
AC-EC 206
AC-EC 226
R134A - R404A - R452A version
Electronic cubers with storage
Scotsman Ice Srl
Via Lainate, 31 - 20010 Pogliano M.se - Milano - Italy
Tel. +39-02-93960.1 (Aut. Sel.)- Telefax +39-02-93550500
Direct Line to Service & Parts:
Phone +39-02-93960350 - Fax +39-02-93540449
Website: www.scotsman-ice.it
E-Mail: scotsman.europe@scotsman.it
SERVICE MANUAL
PC Board version
Page 1
REV. 05/2019

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  • Page 1 Page 1 Page 1 SERVICE MANUAL AC-EC 106 AC-EC 126 AC-EC 176 AC-EC 206 AC-EC 226 R134A - R404A - R452A version Electronic cubers with storage PC Board version Scotsman Ice Srl Via Lainate, 31 - 20010 Pogliano M.se - Milano - Italy Tel.

  • Page 2: Table Of Contents

    Freezing cycle Harvest cycle Electrical sequence Components description ADJUSTMENT, REMOVAL AND REPLACEMENT PROCEDURES Adjustment of the cube size Wiring diagram AC-EC 106-126-176-206-226 Service diagnosis MAINTENANCE AND CLEANING INSTRUCTIONS General Icemaker Clean - Replace of air condenser filter Cleaning instructions of water system...

  • Page 3: Indice Specifications Ac-Ec 106

    The daily ice-making capacity is directly related to the condenser air inlet temperature, water temperature conditions of the condenser air filter and age of the machine. To keep your SCOTSMAN CUBER at peak performance levels, periodic maintenance checks must be carried out as indicated on Maintenance and Cleaning section of this manual.
  • Page 4 Page 4 Page 4 SPECIFICATIONS AC 106 - CUBER machine specifications Water req. Model Cond. unit Finish Comp. HP Capacity lt/24 HR AC 106 AS 0144* Stainless steel 23 Kg. AC 106 WS Water *NYA Start Electric power cons. Basic electr. Amps Watts Nr.
  • Page 5 Page 5 Page 5 SPECIFICATIONS EC 106 - CUBER machine specifications Water req. Model Cond. unit Finish Comp. HP Capacity lt/24 HR EC 106 AS 0144* Stainless steel 23 Kg. EC 106 WS Water *NYA Start Electric power cons. Basic electr. Amps Watts Nr.

  • Page 6: Specifications Ac-Ec 126

    The daily ice-making capacity is directly related to the condenser air inlet temperature, water temperature conditions of the condenser air filter and age of the machine. To keep your SCOTSMAN CUBER at peak performance levels, periodic maintenance checks must be carried out as indicated on Maintenance and Cleaning section of this manual.
  • Page 7 Page 7 Page 7 SPECIFICATIONS Dimensions: HEIGHT (without legs) 920 mm. HEIGHT (with legs) 1010 mm. WIDTH 680 mm. DEPTH 600 mm. WEIGHT 75 Kgs. AC-EC 126 - CUBER (R404A version) machine specifications Water req. Model Cond. unit Finish Comp. HP Capacity lt/24 HR AC-EC 126 AS...
  • Page 8 Page 8 Page 8 SPECIFICATIONS Dimensions: HEIGHT (without legs) 920 mm. HEIGHT (with legs) 1010 mm. WIDTH 680 mm. DEPTH 600 mm. WEIGHT 75 Kgs. AC-EC 126 - CUBER (R134A version from s.n. 09013) machine specifications Water req. Model Cond. unit Finish Comp.

  • Page 9: Specifications Ac-Ec 176

    The daily ice-making capacity is directly related to the condenser air inlet temperature, water temperature conditions of the condenser air filter and age of the machine. To keep your SCOTSMAN CUBER at peak performance levels, periodic maintenance checks must be carried out as indicated on Maintenance and Cleaning section of this manual.
  • Page 10 Page 10 Page 10 SPECIFICATIONS Dimensions: HEIGHT (without legs) 990 mm. HEIGHT (with legs) 1090 mm. WIDTH 680 mm. DEPTH 600 mm. WEIGHT 80 Kgs. AC-EC 176 - CUBER (R404A version) machine specifications Water req. Model Cond. unit Finish Comp. HP Capacity lt/24 HR AC-EC 176 AS...
  • Page 11 Page 11 Page 11 SPECIFICATIONS Dimensions: HEIGHT (without legs) 990 mm. HEIGHT (with legs) 1079 mm. WIDTH 680 mm. DEPTH 600 mm. WEIGHT 70 Kgs. AC-EC 176 - CUBER (R134A version from s.n. 14409) machine specifications Water req. Model Cond. unit Finish Comp.

  • Page 12: Specifications Ac-Ec 206

    Production charts shown indicate the production of ACM models; ice production of ACL and ACS models is 10% lower. To keep your SCOTSMAN CUBER at peak performance levels, periodic maintenance checks must be carried out as indicated on Maintenance and Cleaning section of this manual.
  • Page 13 Page 13 Page 13 SPECIFICATIONS Dimensions: HEIGHT (without legs) 779 mm. HEIGHT (with legs) 859 mm. WIDTH 1250 mm. DEPTH 620 mm. WEIGHT 115 Kgs. AC/EC 206 - CUBER (R404A version) machine specifications Water req. Model Cond. unit Finish Comp. HP Capacity lt/24 HR AC/EC 206 AS...
  • Page 14 Page 14 Page 14 SPECIFICATIONS Dimensions: HEIGHT (without legs) 779 mm. HEIGHT (with legs) 859 mm. WIDTH 1250 mm. DEPTH 620 mm. WEIGHT 115 Kgs. AC/EC 206 - CUBER (R452A version) machine specifications Water req. Model Cond. unit Finish Comp. HP Capacity lt/24 HR AC/EC 206 AS...

  • Page 15: Specifications Ac-Ec 226

    Production charts shown indicate the production of ACM models; ice production of ACL and ACS models is 10% lower. To keep your SCOTSMAN CUBER at peak performance levels, periodic maintenance checks must be carried out as indicated on Maintenance and Cleaning section of this manual.
  • Page 16 Page 16 Page 16 SPECIFICATIONS Dimensions: HEIGHT (without legs) 1005 mm. HEIGHT (with legs) 1085 mm. WIDTH 1078 mm. DEPTH 715 mm. WEIGHT 120 Kgs. AC/EC 226 - CUBER (R404A / R452A version) machine specifications Water req. Model Cond. unit Finish Comp.

  • Page 17: General Information And Installation

    Page 17 GENERAL INFORMATION AND INSTALLATION INTRODUCTION Forward the completed self-addressed registration card to Scotsman Ice srl factory. This manual provides the specifications and the step-by-step procedures for the installation, start- 11. Install the four standard legs supplied in the up and operation, maintenance and cleaning for machine and adjust them to level the unit.

  • Page 18: Water Supply And Drain Connections

    Is the unit in a room where ambient Water supply - Water cooled models temperatures are within a minimum of 10°C The water cooled versions of SCOTSMAN Ice (50°F) even in winter months? Makers require two separate inlet water supplies, one for the water sprayed for making the ice cubes Is there at least a 15 cm (6") clearance...

  • Page 19: Installation Practice

    12. Has the owner been given the name and 11. Has the Manufacturer’s registration card the phone number of the authorized SCOTSMAN Service Agency serving him? been filled in properly? Check for correct model INSTALLATION PRACTICE...

  • Page 20: Operating Instructions

    Page 20 Page 20 OPERATING INSTRUCTIONS incoming surplus of water flows out through the START UP overflow pipe into the drain line. After having correctly installed the ice maker and During the water filling phase the components completed the plumbing and electrical energized are: connections, perform the following “Start-up”...

  • Page 21: Operational Checks

    Page 21 Page 21 At completion of the water filling phase In case of air condenser filter clogged such to (5 minutes) the unit passes automatically into the prevent the proper flow of the cooling air or, freezing cycle with the start up of: in case the fan motor is out of operation or COMPRESSOR shortage of water in the water cooled...
  • Page 22 Page 22 Page 22 FIG. 3 WATER DRAIN VALVE - EVAPORATOR WATER IN VALVE SWITCH - CONDENSER ELECTR. HOT GAS VALVE TIMER COMPRESSOR RELAYS FAN MOTOR TRIAC TRANSF. WATER PUMP RELAY ELECTRONIC CARD Check to see through the ice discharge interior of the inverted mold cups;...
  • Page 23 Page 23 Page 23 The ice making process takes place thereby, and the water drain valves simoultaneously with the water sprayed into the molds that gets activated (Fig. 5). gradually refrigerated by the heat exchange with The electrical components in operation on models the refrigerant flowing into the evaporator are: serpentine.
  • Page 24 Page 24 Page 24 FIG. 5 WATER DRAIN VALVE - EVAPORATOR WATER IN VALVE SWITCH - CONDENSER ELECTR. HOT GAS VALVE TIMER COMPRESSOR RELAYS FAN MOTOR TRIAC TRANSF. WATER PUMP RELAY ELECTRONIC CARD • Optical level sensor (IR); place some ice If the ice cubes are shallow and cloudy, it is cubes between IR optical sensing eyes.
  • Page 25 Page 25 Page 25 Remove, if fitted, the refrigerant service Instruct the owner/user on the general gauges and re-fit the unit service panels operation of the ice machine and about the previously removed. cleaning and care it requires. FIG. 6 WATER DRAIN VALVE - EVAPORATOR WATER IN VALVE...

  • Page 26: Freezing Cycle

    PRINCIPLE OF OPERATION How it works temperature sensor (which has its probe in contact In the SCOTSMAN cube ice makers the water with the evaporator serpentine) that determines used to make the ice is kept constantly in the length of its first portion of the cycle.
  • Page 27 Page 27 Page 27 FIG. A FIG. B FIG. C FIG. D...
  • Page 28 Page 28 Page 28 FIG. E FIG. F FIG. G FIG. H...

  • Page 29: Harvest Cycle

    Page 29 Page 29 In Table B are indicated the various lengths of the with the cubes fully formed in the cup molds. The timed portion of freezing cycle in relation to the total length of the freezing cycle ranges from 20 different combinations of the DIP SWITCH KEYS.

  • Page 30: Electrical Sequence

    Page 30 Page 30 OPERATION - CONTROL SEQUENCE TIMED FREEZE Electrical components (Loads) At the start of freezing cycle the evaporator • temperature sensor controls the length of the first Compressor ..........• • part of the freezing cycle. Fan Motor (Air cooled only) and TRIAC ..•...
  • Page 31 Page 31 Page 31 OPERATING CHARACTERISTICS REFRIGERANT CHARGES OPERATING PRESSURES REFRIGERANT TYPE REFRIG. ° ° MODEL C temp. amb./15 C temp. water MODEL R134A R404A R452A TYPE Discharge (bar) Suction (bar) AC/EC 106 A 320 gr 9,5 ÷ 8,5 0 ÷ 0,1 AC/EC 106 A R134A 10,5 ÷...
  • Page 32 Page 32 Page 32 The water can be pumped out up to 1.5 m rise PWD SYSTEM (EC version only) HAND DISCONNECT SWITCH WATER VALVE COMPONENTS WATER FILTER The components of the Pump Out Water Drain System are • Sealed water tank POWER •...
  • Page 33 Page 33 Page 33 SCHEMATIC SYSTEM Drain fitting Vented tube Storage bin Water level Check sensors valve Drain out Sealed water tank Overflow drain Water tube pump Storage bin drain tube Water tank inlet fitting...

  • Page 34: Components Description

    Page 34 Page 34 COMPONENTS DESCRIPTION current arriving to the micro processor is such to EVAPORATOR TEMPERATURE cause an immediate and total stop of the machine SENSOR operation. The evaporator temperature sensor probe, located in contact with the evaporator serpentine, detects the dropping of the evaporator tempera- ICE LEVEL THERMAL PROBE ture during the freezing cycle and signals it by...
  • Page 35 Page 35 Page 35 to control the operation of the different electrical The P.C. BOARD is the brain of the system and components of the ice maker (compressor, water it elaborates, through its micro processor, the pump, solenoid valves, etc.). signals received from the three sensors in order At the end of the 3 minutes the PC Board switch At restart, from any tripping OFF at Bin Full, the...
  • Page 36 Page 36 Page 36 PUSH BUTTON OPERATION REASON WHY STATUS DURING WATER FILLING PHASE • Push for more then 2” but less then 5” the ON STEADY UNIT UNDER POWER machine enters in Cleaning Mode • Push for more then 5” the machine by-pass the Water Filling Phase ON STEADY FREEZING CYCLE...
  • Page 37 Page 37 Page 37 size of the cubes (Large or Medium) as per the CONDENSER AIR FILTER following setting: (Air cooled version) ON : PROGRAM A Located in front of the air cooled condenser can OFF : PROGRAM B be removed by withdrawing it through the opening OFF OFF : PROGRAM C of the front panel for cleaning or replacing.
  • Page 38 Page 38 Page 38 WATER INLET SOLENOID VALVE - and become high pressure hot vapor which is 3/4 MALE FITTING then released through the discharge valve. (AC/EC 106 only) A second water inlet solenoid valve is used on water cooled version. An automatic hi pressure HI PRESSURE CONTROL control activates the coil of the water inlet solenoid (AC/EC 106 only)

  • Page 39: Adjustment Of The Cube Size

    Page 39 Page 39 ADJUSTMENT PROCEDURES 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 SMALL...

  • Page 40: Wiring Diagram Ac-Ec 106-126-176-206-226

    Page 40 Page 40 WIRING DIAGRAM AC/EC 106-126-176-206-226 AIR AND WATER COOLED 230/50-60/1 The unit is shown on freezing cycle...
  • Page 41 Page 41 Page 41...

  • Page 42: Service Diagnosis

    Moisture in the system Same as above Shortage of refrigerant Check for leaks & recharge Cloudy cubes Shortage of water See remedies for shortage of water Dirty water supply Use water softner or water filter Accumulated impurities Use SCOTSMAN Ice Machine cleaner...
  • Page 43 Page 43 Page 43 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Shortage of water Water spilling out through curtain Check or replace curtain Water solenoid valve not opening Replace valve Water leak in sump area Locate and repair Water flow control plugged Replace water inlet valve Leak of water drain valve Replace valve...
  • Page 44 Page 44 Page 44 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Unit won’t harvest Inoperative P.C.Board Replace P.C.Board Hot gas valve not opening Valve coil with open winding Replace valve Water solenoid valve not opening Valve coil with open winding Replace valve Incorrect discharge pressure Inoperative condenser sensor...

  • Page 45: Maintenance And Cleaning Instructions

    CLEANING/SANITISING INSTRUCTIONS icemakers. OF WATER SYSTEM Check and clean the water line strainer. Clean-sanitise the water system, evaporator, bin and spray jets using a solution of SCOTSMAN Ice Machine Cleaner/Sanitizer. Check that the icemaker is levelled in side...
  • Page 46 (45°- 50°C) with 0,2 liters of Ice Machine Cleaner. Lift up and remove the curtain. WARNING. The SCOTSMAN Ice Machine Cleaner contains Phosphoric and Hydroxyacetic acids. These compounds are corrosive and may cause burns if swallowed, DO NOT indu- ce vomiting.
  • Page 47 Page 47 Page 47 PUSH BUTTON for more then 2" and less of 5" 15. Switch ON again the machine. The water to put the machine in cleaning mode. pump is again in operation to circulate the water in order to rinse the entire water system. Do the operation as per steps 13 and 14 twice so NOTE.
  • Page 48 Page 48 Page 48 Follow the procedures as per cleaning water ATTENTION. In case the ice cubes are pump operation, only by keeping pushed Reset cloudy-white and have an acid taste, melt button between 2 ÷ 5" during water filling. Just them immediately by pouring on them shorting the operation of the water pump to 10 some warm water.
  • Page 49 Check that the icemaker is levelled in side to side and in front to rear directions. Clean the water system, evaporators, bin and spray bar/s using a solution of SCOTSMAN Ice Machine Cleaner. Refer to procedure C cleaning instructions and after cleaning will indicate frequency and proce- dure to be followed in local areas.
  • Page 50 (45°-50°C) with Check for water leaks and tighten drain line connections. Pour water down through the a 0,2-0,3 liters of SCOTSMAN Ice Machine Cleaner. storage bin drain line to be sure that drain line is open and clear.
  • Page 51 Page 51 Page 51 10. Flush out the cleaning solution from the ATTENTION. in case the ice cubes are sump reservoirs then pour onto each evaporator cloudy, white and have an acid taste, melt cavity two or three liters of clean potable water them immediatelly by pouring on them with a capfull of antibacteria solution to rinse and some warm water.
  • Page 52 Page 52 Page 52 20. Follow the procedures as per cleaning water ATTENTION. In case the ice cubes are pump operation, only by keeping pushed Reset cloudy-white and have an acid taste, melt button between 2 ÷ 5" during water filling. Just them immediately by pouring on them shorting the operation of the water pump to 10 some warm water.

This manual is also suitable for:

Ac-ec 126Ac-ec 176Ac-ec 206Ac-ec 226

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