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Page 34

SERVICE DIAGNOSIS

SYMPTOM

POSSIBLE CAUSE

SUGGESTED CORRECTION

Unit will not run

Blown power in fuse in P.C.Board

Replace fuse & check for cause of

(No warning LEDS glows)

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. Board Replace fuse & check for cause of

blown fuse

(Bin full LED glows)

Inoperative ice level control

Clean or replace ice level control

Inoperative P.C.Board

Replace P.C.Board

(Red-alarm LED-LIGHT glows)

High head pressure

Inoperative fan motor. Replace
Shortage of water (WC)

(Red-alarm LED blinks)

High evaporating temperature

Hot gas valve leak - Replace it.

after 15 mins. beginning freeze

Water inlet valve leak - Replace it.
Short of refrigerant.
Compressor cycles intermittently

(Freezing LED + Red-alarm LED glows)

Condenser sensor out of order

Replace it

and Red-alarm Light blinks twice
and repeat

(Freezing LED + Red-alarm LED blinks)

Evaporator sensor out of order

Replace it

Compressor cycles intermittently

Low voltage

Check circuit for overloading
Check voltage at the supply to the
building. If low, contact the power
company

Contactor with burnt contacts

Replace it

Non-condensable gas in system

Purge the system

Compressor starting device with

Check for loose wires in starting

loose wires

device

Mechanical problem

Replace compressor

Cubes too small

Freezing cycle too short

Review setting of DIP SWITCH keys

Capillary tube partially restricted

Blow charge, add new gas & drier,
after evacuating systemwithvacuum
pump

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

Содержание AC 106

Страница 1: ...Page 1 Page 1 SERVICE MANUAL AC 106 AC 126 AC 176 AC 206 AC 226 Electronic cubers with storage MS 1000 90 REV 02 2007 ...

Страница 2: ...onnections Final check list Installation practice OPERATING INSTRUCTIONS Start up Operational checks OPERATING PRINCIPLES How it works Freezing cycle Harvest cycle Electrical sequence Components description ADJUSTMENT REMOVAL AND REPLACEMENT PROCEDURES Adjustment of the cube size Wiring diagram AC 106 Wiring diagram AC 126 AC 176 AC 206 AC 226 Wiring diagram ACS 126 ACS 176 Service diagnosis MAINT...

Страница 3: ... higher than 32 C 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 AIR COOLED MODELS WATER TEMPERATURE AMBIENT TE...

Страница 4: ...mp HP SPECIFICATIONS Basic electr Amps Watts Nr of wires Amps fuse 230 50 1 3 3 18 550 3 x 1 5 mm2 10 0136 550 AC 106 CUBER machine specifications Cubes per harvest 32 medium A 15 C water temperature Dimensions HEIGHT without legs 850 mm HEIGHT with legs 970 mm WIDTH 530 mm DEPTH 600 mm WEIGHT 45 Kgs 10 3 9 4 Bin Water req Capacity lt 24 HR 850 ...

Страница 5: ...ratures higher than 32 C 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 AIR COOLED MODELS WATER TEMPERATURE AMB...

Страница 6: ...30 50 1 4 19 600 3 x 1 5 mm2 10 190 750 AC 126 CUBER machine specifications Cubes per harvest 48 medium A 15 C water temperature Dimensions HEIGHT without legs 930 mm HEIGHT with legs 1050 mm WIDTH 680 mm DEPTH 600 mm WEIGHT 75 Kgs 14 8 11 8 Bin Water req Capacity lt 24 HR OVERFLOW DRAIN CORD SET WATER INLET WATER INLET WATER COOLED UNIT WATER OUTLET WATER COOLED UNIT ADJUSTABLE FOOT MIN FOR UTILI...

Страница 7: ...he 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 AIR COOLED MODELS WATER TEMPERATURE AMBIENT TEMPERATURE ICE PRODU...

Страница 8: ... 50 1 5 6 26 760 3 x 1 5 mm2 10 150 1050 AC 176 CUBER machine specifications Cubes per harvest 48 medium A 15 C water temperature Dimensions HEIGHT without legs 1000 mm HEIGHT with legs 1120 mm WIDTH 680 mm DEPTH 600 mm WEIGHT 80 Kgs 15 0 13 5 Bin Water req Capacity lt 24 HR OVERFLOW DRAIN CORD SET WATER INLET WATER INLET WATER COOLED UNIT WATER OUTLET WATER COOLED UNIT ADJUSTABLE FOOT MIN FOR UTI...

Страница 9: ...dicate 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 AIR COOLED MODELS WATER TEMPERATURE AMBIENT TEMPERATURE ICE PRODUCED PER 24 HRS WATER COOLED MODELS 130 128 126 124 122 120 118 116 114 112 110 108 ...

Страница 10: ...wires Amps fuse 230 50 1 4 7 19 950 3 x 1 5 mm2 16 280 1400 AC 206 CUBER machine specifications Cubes per harvest 72 large 102 medium 198 small A 15 C water temperature 20 8 17 3 Bin Water req Capacity lt 24 HR AC 206 AS 6 Air AC 206 WS 6 Water Dimensions HEIGHT without legs 780 mm HEIGHT with legs 860 mm WIDTH 1250 mm DEPTH 620 mm WEIGHT 115 Kgs ADJUSTABLE FOOT ...

Страница 11: ...84 Kg 10 21 32 38 C o 32 27 21 15 10 C o WATER TEMPERATURE AMBIENT TEMPERATURE ICE PRODUCED PER 24 HRS 152 148 144 140 136 132 128 124 120 116 112 108 Kg 10 21 32 38 C o 32 27 21 15 10 C o NOTE 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 Production charts shown indicate the ...

Страница 12: ... 1180 3 x 1 5 mm2 16 330 1800 AC 226 CUBER machine specifications Cubes per harvest 72 large 102 medium 198 small A 15 C water temperature Dimensions HEIGHT without legs 1006 mm HEIGHT with legs 1126 mm WIDTH 1078 mm DEPTH 715 mm WEIGHT 120 Kgs 24 2 19 2 Bin Water req Capacity lt 24 HR ADJUSTABLE FOOT OVERFLOW DRAIN CORD SET WATER OUTLET WATER COOLED UNIT WATER INLET WATER COOLED UNIT MIN FOR UTIL...

Страница 13: ... front to rear directions D ELECTRICAL CONNECTIONS See data plate for current requirements to determine wire size to be used for electrical connections All SCOTSMAN icemakers require a solid earth wire A INTRODUCTION This manual provides the specifications and the step by stepproceduresfortheinstallation start up and operation maintenance and cleaning for the SCOTSMAN AC series icemakers These Cub...

Страница 14: ...e an appropriate water filter or conditioner Water Cooled Versions AC 106 only On WaterCooledversionthewaterinletsolenoid valve has two separate outlets one for the condenser and the second for the production of ice Water supply Water cooled models Not on AC 106 The water cooled versions of SCOTSMAN Ice Makersrequiretwoseparateinletwatersupplies one for the water sprayed for making the ice cubes a...

Страница 15: ...low 5 C 40 F or above 35 C 90 F 1 2 3 4 5 6 7 8 9 8 Havetheboltsholdingthecompressordown been checked to ensure that the compressor is snugly fitted onto the mounting pads 9 Have the bin liner and cabinet been wiped clean 10 Has the owner user been given the User Manualandbeeninstructedontheimportanceof periodic maintenance checks 11 Has the Manufacturer s registration card been filled in properly...

Страница 16: ... the incoming surplus of water flows out through the overflow pipe into the drain line During the water filling phase the components energized are THE WATER INLET SOLENOID VALVE THE HOT GAS SOLENOID VALVE THE WATER DRAIN SOLENOID VALVE Not on AC 106 NOTE If in the 5 minutes lenght of the water filling phase the machine sump reservoir does not get filled with water up to the rim of the overflow pip...

Страница 17: ... water into the sump tank C At completion of the water filling phase 5 minutes the unit passes automatically into the freezing cycle with the start up of COMPRESSOR CONTACTOR COIL Not on AC 106 WATER PUMP FANMOTOR inaircooledversion controlledby thecondensingtemperaturesensorlocatedwithin the condenser fins Fig 2 OPERATIONAL CHECKS D Install if required the refrigerant service gauges on both the h...

Страница 18: ...12 Rx Tx WATER IN VALVE HOT GAS VALVE CONTACTOR COIL FAN MOTOR WATER PUMP EVAPORATOR AMBIENT CONDENSER TEMPERATURE SENSORS BIN COMPRESSOR TRANSF DATA PROCESSOR ELECTR TIMER DIP SWITCH ELECTRONIC CARD L N RELAYS RELAY TRIAC WATER DRAIN VALVE FIG 4 16 15 14 13 2 1 7 8 9 10 3 4 5 6 11 12 Rx Tx WATER IN VALVE HOT GAS VALVE CONTACTOR COIL FAN MOTOR WATER PUMP EVAPORATOR AMBIENT CONDENSER TEMPERATURE SE...

Страница 19: ...ifferent DIP SWITCH keys setting G After about 17 20 minutes from the begin ning of the freezing cycle in an hypothetic ambient temperature of 21 C the defrost cycle takes place with the hot gas the water inlet and the water drain valves simoultaneously activated Fig 5 Theelectricalcomponentsinoperationonmodels are COMPRESSOR CONTACTOR COIL Not on AC 106 WATER INLET VALVE HOT GAS VALVE WATER DRAIN...

Страница 20: ...LOW LED NOTE The ICE LEVEL CONTROL INFRAREDSYSTEM isindependentofthe temperature however the reliability of its detection can be affected by external light radiations or by any sort of 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 locate the ...

Страница 21: ...tagecurrent 15volts toflowtotheP C BOARD which in turn activates an electronic timer The timer which is built in the P C BOARD takes over from the evaporator temperature sensor thecontrolofthefreezingcycleuptoitscompletion NOTE Thechangeoftheelectricpotentialof the evaporator sensor with the consequent activationofthetimer Timemode issignalled by the glowing up of the RED LED located in the front ...

Страница 22: ...Page 22 Page 22 FIG A FIG B FIG C FIG D ...

Страница 23: ...Page 23 Page 23 FIG E FIG F FIG G FIG H ...

Страница 24: ...ose and the machine starts again a new freezing cycle InTableBareindicatedthevariouslengthsofthe timed portion of freezing cycle in relation to the differentcombinationsoftheDIPSWITCHKEYS In Table A herebelow are illustrated the DIP SWITCH keys combinations for the different models and versions as they are set in the factory The electrical components in operation during the freezing cycle are COMP...

Страница 25: ... Condenser Sensor Ice Level Control TIMED FREEZE Electrical components Loads ON OFF Compressor Fan Motor Air cooled only and TRIAC Hot Gas Valve Water Inlet Valve Water Drain Valve P C Board Relay 1 Coil P C Board Relay 2 3 Coil Water Pump Contactor Coil Not on AC 106 P C B Timer Electronic Controls Sensors ON OFF Evaporator Sensor Condenser Sensor Ice Level Control HARVEST Drain portion first 15 ...

Страница 26: ... the electronic timer built into theP C BOARDsothatittakescontrolofthelast portion of freezing cycle The length of the timed phase is pre fixed by the setting of the keys 1 2 3 and 4 of the DIP SWITCH NOTE Whenever after 15 minutes from the beginning of the freezing cycle the evaporating temperature have not yet reached the value of 0 C 32 F small Red LED OFF the P C Board switches OFF the machine...

Страница 27: ...LED blink 0 C steady 15 C of one DIP SWITCH with ten keys of one push button of input terminals for the leads of the sensor probes and input and output terminals for the leads of the ice maker electrical wires The P C BOARD is the brain of the system and it elaborates through its micro processor the signals received from the three sensors in order to control the operation of the different electric...

Страница 28: ... 4 The DIP SWITCH N 7 and 8 allow the extention ofthelengthoftheharvest defrostcycleaccording to their combination as per following chart DIP SWITCH ADDITIONAL DEFROST TIME 7 8 ON ON 0 OFF ON 30 ON OFF 60 OFF OFF 90 The 9th key is used to supply power to the water pump for the first 15 seconds of the defrost cycle position OFF or for the first 30 seconds position ON The 10th key is used to modify ...

Страница 29: ...s solenoid valve consists basically in two parts the valve body and the valve coil Located on the hot gas line this valve is energized throughthemicroprocessorofP C BOARDduring the defrost cycle as well as during the water filling phase During the defrost cycle the hot gas valve coil is activated so to attract the hot gas valve pistoninordertogivewaytothehotgasdischarged fromcompressortoflowdirect...

Страница 30: ...heckthecorrisponding length of freezing cycle 2nd phase on Table B 3 Set the same DIP SWITCH KEYS to correspond to the prior combination shown on Table B which allow an extention of two more minutes of the length of the freezing cycle 4 Observe the ice cubes in the next two harvests and eventually repeat steps 2 and 3 above until proper ice cubes size is achieved See figure II Ifthecubesareoversiz...

Страница 31: ...Page 31 Page 31 WIRING DIAGRAM AC 106 AIR AND WATER COOLED 230 50 60 1 The unit is shown on freezing cycle ...

Страница 32: ...Page 32 Page 32 WIRING DIAGRAM AC 126 176 206 226 AIR AND WATER COOLED 230 50 60 1 The unit is shown on freezing cycle ...

Страница 33: ...hown on freezing cycle AIR COOLED MODEL WATER COOLED MODEL EASY FIT MODEL SCK1 SENSOR COND TEMP PUMP WATER VALVE HOT GAS COND TEMP SENSOR SENSOR BIN FULL SENSOR EVAP TEMP DISCHARGE FAN WATER COMPRESSOR WATER INLET HCTIWS REWOP WATER COND VALVE TESER LORTNOC ERUSSERP RETAW VALVE PUMPS MOTOR ...

Страница 34: ...ressor cycles intermittently Freezing LED Red alarm LED glows Condenser sensor out of order Replace it and Red alarm Light blinks twice and repeat Freezing LED Red alarm LED blinks Evaporator sensor out of order Replace it Compressor cycles intermittently Low voltage Check circuit for overloading Check voltage at the supply to the building If low contact the power company Contactor with burnt cont...

Страница 35: ...e system Poor air circulation or excessive Relocate the unit or provide for hot location Red alarm LED glows more ventilation Overcharge of refrigerant Correct the charge Purge off slowly Capillary tube partially restricted Blow charge add new gas drier after evacuating system with vacuum pump Hot gas solenoid valve leaking Replace valve Short of refrigerant Charge to data plate indication Dischar...

Страница 36: ...eplace valve Water solenoid valve not opening Valve coil with open winding Replace valve Incorrect discharge pressure Inoperative condenser sensor Replace sensor Inoperative P C Board Replace P C Board Water regulating valve misadjusted Adjust its setting stem AC 126 176 206 226 only Excessive water in unit base Water tubing leaking Check Tighten or replace SERVICE DIAGNOSIS ...

Страница 37: ...e the ice maker to shut off and the light up of the 2nd LED yellow light NOTE Within few seconds after the removal of the hand from the Infrared sensing light the icemaker restarts in freezing cycle The ice level control uses devices that sense light therefore they must be kept clean enough so they can see Every month clean wipe the sensing eyes with a clean soft cloth 6 Check for refrigerant leak...

Страница 38: ... solution With the help of a brush dissolve the most resistant and remote scale deposits in the platen D CLEANING SANITISING INSTRUCTIONS OF WATER SYSTEM Clean sanitise the water system evaporator bin and spray jets using a solution of SCOTSMAN Ice Machine Cleaner Sanitizer NOTE Cleaningrequirementsvaryaccording to the local water conditions and individual useroperation Continuouscheckoftheclarity...

Страница 39: ... the water in order to rinse the entire water system Do the operation as per steps 13 and 14 twice so to be sure no more traces of descaling solution remains into the sump Sanitation NOTE Sanitation of the water system is recommended to be done once a month 16 Prepare in a plastic container the sanitation solution as per manufacturer dilution using warm water 45 50 C NOTE Never mix the cleaning wi...

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