Hoshizaki America, Inc. - Hendrix Restaurant Equipment and Supplies
Contents
1. 2 After the above step 1 disconnect the float switch leads from the controller board within the first 5 minutes of the freeze cycle The unit should go into the defrost cycle after the first 5 minutes 20 seconds of the freeze cycle 19 3 Reconnect the float switch connector to the controller board After the first 5 minutes of the freeze cycle disconnect the float switch leads from the controller board At this point the unit should start the defrost cycle 4 After step 3 de energize the unit and confirm that the defrost timer is in the minimum position Disconnect the resistor from the controller board and energize the unit After the 1 minute water supply cycle the defrost cycle starts Re connect a 1 5 to 3 5 KQ resistor to connector K3 pins 1 and 2 after the first 2 minutes of the defrost cycle The unit should start the freeze cycle after 1 minute 5 seconds from the resistor connection c Check the controller board using the controller board s test program The output test switch S3 provides a relay sequence test With power OFF place S3 ON and switch power to ICE The correct lighting sequence should be none 2 3 4 1 and 4 normal sequence every 5 seconds S3 should remain in the OFF position for normal operation 20 Ill Technical Information A Water Circuit and Refrigerant Circuit 1 KM 320MAH Spray Tube Water Condenser High Pressure Switch X Water Supply fej fOm Cle2. book 7 amp 8 must remain in the OFF position itch Output Test Switch Used to test Relays on Board Dip Sw Alarm Reset Switch 0008810 OUTPUT TEST mA Hie ae ai ae ig a mn Backup Freeze Timer LED Connector K3 Defrost Control Thermistor Backup Defrost Timer LED not connected Alarm Buzzer Microprocessor Will indicate Board revision level on attached label last 2 digits Power LED Lights up Connector K5 when power Float Switch is supplied to the Board Part Number Connector K1 Pins 1 through 10 1 9 Magnetic Contactor 2 Hot Gas Valve 3 Line Valve 4 Pump Motor icemaking 5 Pump Motor drain 6 Water Valve 7 10 Power line Bin Control 8 Open Relay LED s 4 Switch for C Board Indicate which and ALPINE Board Relays are energized Service Boards only Control Products HOS 001A Board Transformer Connector 12 3 Sequence 1st Cycle 3 Thermistor reads 48 F 9 C 1 Unit energized and control switch to ICE position Water supply cycle starts Defrost timer starts counting 2 After 1 minute defrost cycle starts Water Valve Water Valve Hot Gas Valve 2 3 Defrost Cycle Freeze Cycle Pump Fan amp Line Valve IMPORTANT Water valve opening is limited to 6 minutes 4 Defrost timer stops counting Defrost cycle is comple
3. Inlet 1 2 FPT Outlet 3 4 FPT 3 8 OD Tube Float Switch Hot Gas and Water Thermistor and Timer Timer Controlled Overflow Pipe N A Thermostat Hermetic Model ASE32C3E CAA Air Cooled Fin and tube type Vertical type Stainless Steel and Copper Thermostatic Expansion Valve R 404A 1 lb 4 3 oz 575g High 467PSIG Low 210PSIG High Voltage Cut out Internal Auto reset Overload Protector Internal Auto reset High Pressure Control Switch Float Switch N A Ice Storage Bin VOLTAGE RANGE 104 127 V AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 F WATER SUPPLY PRESSURE 10 113 PSIG Note We reserve the right to make changes in specifications and design without prior notice B KM 320MWH water cooled AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR lbs day kg day Reference without marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 lbs WATER gal 24HR gal 100 Ibs WATER COOLED CONDENSER gal 24HR gal 100 Ibs EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY DRAIN CUBE CONTROL SYSTEM HARVESTING CONTROL SYSTEM ICE MAKING WATER CONTROL COOLING WATER CONTROL BIN CONTROL SYSTEM COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE P C BOARD CIRCU
4. operates 28 j Water Supply Line 1 Water supply off and 1 Check and get water supply cycle recommended pressure does not finish Condenser water 2 Check and get pressure too low recommended pressure or off and pressure control opens and closes frequently to finally operate high temperature safety k Water Solenoid Mesh filter or orifice 1 Clean gets clogged and water supply cycle does not finish 2 Coil winding opened 2 Replace 3 Wiring to water valve 3 Check for loose connection or open and replace Controller Board 1 Defective 1 See II B 5 Checking the Controller Board m Interlock Switch 1 OFF Position 1 Move to ON position Cleaning Valve 2 Bad contacts 2 Check for continuity and replace 2 Water continues to a Float Switch 1 Connector 1 Place in position be supplied and the disconnected icemaker will not 2 Leads opened or 2 Check and replace start defective switch 3 Float does not move 3 Clean or replace freely b Controller Board 1 Defective 1 Replace c Contactor 1 Open coil or contacts 1 Replace worn 3 Compressor will a Wash Switch 1 WASH position 1 Move to ICE position not start or stops 2 Bad contacts 2 Check and replace operating a b High Pressure 1 Dirty air filter or 1 Clean Controller condenser 2 Ambient or condenser 2 Reduce temperature water temperature too warm 3 Refrigerant 3 Recharge over
5. E Removal and Replacement of Expansion Vale cccccccceeeeeeeeeeeeeeesseeeeeeeeeeeeeeees 37 F Removal and Replacement of Hot Gas Valve and Line VaIVe ccccccccecceeeeeeeeeeeeees 38 G Removal and Replacement of Evaporator ccccccccccccccceceeeeeeeeeesseeeeeesensencnsnseeeeeees 39 H Removal and Replacement of Thermistor ccceeeeeeeeeeeeeeeeeeeeeeeseeeeseeeeeeeeeeees 40 I Removal and Replacement of Fan Motor ssccienecvieitiececieeii ined eee 41 J Removal and Replacement of Water ValVe ccccccceccsseeseseeeseeeeeeeeeeeeeeeeeeeeeeeeaaeaaaeees 41 3 K Removal and Replacement Of Pump Motor cos ceosccestscsescscadaxerectataddeesenstedassadabibacaxatene 42 L Removal and Replacement of Spray TUDGS ccccceseeeeessseseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 42 M Removal and Replacement of Water Regulating Valve Water Cooled Model Only 43 N Adjustment Of Water Regulating Valve Water Cooled Model Onlly 000 44 VI Cleaning and Maintenance Instructions ai2e5cicsanctcecxeteietoscdenada tenes Sdesiptensdncseledecteessaeceaetexe 45 A Preparing the icemaker for Long Storage wisic s ssscccctecctavicestsictceecanceedegemeseecsteee tenet 45 B Cleaning and Sanitizing Instructions jecetcccessocenereven tebe ceratecadenmedteatistetocatedere ae ieseee 47 1 Cleaning PC SN sanoneen naen TN 48 2 Sanitizing Procedure Following Cleaning Procedure ccc
6. Part Code 4A0683 01 equivalent 3 Always use a recommended foam insulation Non absorbent Type or equivalent 4 Do not shorten or cut the thermistor leads when installing it r 2 3 4 Turn off the power supply Thermistor Lead Cable Tie Remove the panels z m ial rl Remove the control box cover Disconnect the thermistor leads from the K3 connector on the controller board w a a 5 Remove the plastic cable ties foam insulation thermistor holder and thermistor See Fig 1 6 Scrape away the old sealant on the Foam Insulation Thermistor Holder thermistor holder and the suction pipe Fig 1 7 Wipe off moisture or condensation on the suction pipe 8 Smoothly apply recommended sealant KE4560RTV Part Code 60Y000 11 or 4A0683 01 to the thermistor holder concave 9 Attach the new thermistor to the suction pipe very carefully to prevent damage to the leads And secure it using the thermistor holder and recommended foam insulation 10 Secure the insulation using the plastic cable ties 11 Connect the thermistor leads through the bushing of the control box to the K3 connector on the controller board Note Do not cut the leads of the thermistor while installing it 12 Replace the control box cover and the panels in their correct positions 13 Turn on the power supply 40 I Removal and Replacement of Fan Motor Note When replacing a fan motor with defective winding it is recommended that a
7. drain valve for the water cooled condenser water supply line 8 Allow the line to drain by gravity 9 Attach compressed air or carbon dioxide supply to the condenser water line drain valve 10 Quickly blow the water cooled condenser out using compressed air or carbon dioxide until water stops coming out 2 Remove the water from the potable water supply line 1 Remove the front panel except water cooled model 2 Move the control switch on the control box to the OFF position 3 Wait 3 minutes 4 Close the potable water supply line shut off valve and open the potable water supply line drain valve 5 Allow the line to drain by gravity 7 8 Blow the potable water line out using compressed air or carbon dioxide 45 6 Attach compressed air or carbon dioxide supply to the potable water line drain valve Move the control switch to the ICE position 3 Drain the potable water tank 1 Turn off the power supply 2 Move the control switch to the OFF position 3 Drain the water tank by removing the base cover and one end of the pump tubing See Pull Out Fig 4 Pump Tubing 4 Replace the removed parts in their correct positions 5 Remove all ice from the storage bin and Do not pull out this side clean the storage bin 6 Replace the front panel in its correct position Fig 4 7 Close the drain valve 46 B Cleaning and Sanitizing Instructions IMPORTANT Ensure all components fastener
8. gas 140 PSIG and soap bubbles 7 Evacuate the system and charge it with refrigerant See the nameplate for the required refrigerant charge 8 Replace the panels in their correct positions 9 Turn on the power supply E Removal and Replacement of Expansion Valve IMPORTANT Sometimes moisture in the refrigerant circuit exceeds the drier capacity and freezes up at the expansion valve Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Turn off the power supply 2 Remove the panels 3 Recover the refrigerant and store it in an approved container 4 Remove the insulation and the expansion valve bulb on the suction line 5 Remove the expansion valve cover and disconnect the expansion valve using brazing equipment 37 6 Braze the new expansion valve with nitrogen gas flowing at a pressure of 3 to 4 PSIG WARNING 1 Do not heat the wall Place a steel barrier for protection 2 Always protect the valve body by using a damp cloth to prevent the valve from overheating Do not braze with the valve body exceeding 250 F 121 C 7 Install a new drier 8 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 9 Evacuate the system and charge it with refrigerant See the nameplate for the required refrigerant charge 10 Attach the bulb to the suction line in position Be sure to sec
9. new capacitor be installed 1 Turn off the power supply 2 Remove the panels 3 Remove the closed end connectors from the fan motor leads 4 Remove the fan motor bracket and fan motor 5 Install the new fan motor and replace the removed parts in the reverse order of which they were removed 6 Replace the panels in their correct positions 7 Turn on the power supply J Removal and Replacement of Water Valve 1 Turn off the power supply 2 Close the water supply line shut off valve 3 Remove the front panel 4 Remove the valve outlet tubing by releasing the clamp 6 Remove the fitting nut and water valve 7 Disconnect the terminals from the water valve 8 Install the new water valve and replace the removed parts in the reverse order of which they were removed 5 Remove the bracket from the unit 9 0 1 Open the water supply line shut off valve 10 Turn on the power supply 11 Check for leaks SSE a fT 12 Replace the front panel in its correct position 41 K Removal and Replacement of Pump Motor 1 Turn off the power supply 2 Remove the front panel 3 Remove the base cover 4 5 6 Disconnect the pump suction and discharge hoses Drain the water tank by removing one end of the pump tubing Replace the removed parts in their correct positions 7 Remove the closed end connectors from the pump motor leads 8 Remove the screw at
10. or maintenance CONTENTS Drs SUN AN Sneen beau cated E O NENS 5 A KM 320MAH air cooled accecceecadecetincatatatitica cic tua baste taseetetentemeraneiaateceeedeteataeeaeeecece secs 5 BASCOM VV EL Walter COO GG irises x cheeininnct eens bes ated eeu 6 Il General InformatlON sene GNG 7 Az COnsStrUCHON sesse NS 7 1 KM 320MAH air cooled cease cas scceaecassiecectcnacneatanssasedadenuxtal siatataiecececedecieemomameceerts 7 2 KM 320MWH water cooled ssasccusatesertinxtecezuilsiwisterteers teers 8 B C troll r Board seroren A E GN 9 1 Solid State Control a ateteantenrpieilaniete n teehee 9 2 el a Board seieren O ene mene en E TOAT 9 J OCGUENCE Senet ener Reet E eee rrr mr Meee ee mr ee ener ee Tee ee 13 4 ontrols and AGIUSUNIG MIS ssrsioiniii a aa a arara a aaa aaraa 16 5 Checking the Controller Board esastete chute se ceyereteredetceceyesehiebieaeoet este heceeseiecblacbece aac 19 Ii Techmcatlniorma lo y liememerereere rer meer eres teresa E a trent ane 21 A Water Circuit and Refrigerant INCU asia u2sehcateciiseteet iets te nedevate cise vdeieserepeiatesvscteetedee niece 21 Mig KM S20MA Fl a set aca secu cthar S 21 Be OD Eel icicles ase eens eee seca ees 22 B Wining DIAG AIT sasaninstacixiniceetnedsdanateaielieeii narnia inieeisentetearadeeianamatanade 23 1 KM 320MAH KM 320MWH os saree secre nec ceceee ees Sand acta va eee axodecenee eee emaetune 23 C INU AI ts a ca Sects cece cea ose ascas asec ace A aces 2
11. 4 D Perormante Bel cen tence re nt te en eee oer rn ne een een ret eer er eee een ne ere ee 26 1 KM S20MA emer er ere rere oR Oe A 26 2 41 S210 1 111 9 ener ene Menre E E te eee ee ere 27 TV Service DIAGNOSIS mopa on e pecacccoaie aa cecaensers bot ecaeneteeceaccans 28 Ac NOCE ag cee 011 eee ne eee mer eTnt one cent er ent seers a Mer eerere en rete re met te 28 B Evaporator IS Frozen scace as gua ets Ge iadecencecea ee ea a dress Seeded encase 31 G Low lce ProdUCtiON secerneren nen rern Ter Trea mnie enter erent er cement et 33 D PAIN NG cs se ca ceca cas bacainee tent gsaaas sactex eienec sa ueceeasacece sec ees Jad Geaeiecn cont nea aseaacaoemaneceee 33 gi perenne eee ere ee ee ese Cte er eee eter eee eee ee er ie ere eer eee een et 33 V Removal and Replacement of Components cccccccccccececeeeeeeeeeeeeeseeeseeeeenneeaaaaaeeeeeess 34 A Service for Refrigerant Lines cio cesceceiceeteacticaterieet et iotitenchenete vieeweeieseeteiatesvsetuceanete 34 1 Retrigerant ReCOveiy eniinin aeeienaignaiuk aera taaxs uaiou poutateetbeammananaae 34 2 Evacuation and Recharge R404 A wcsiesciecccissccsetcasaccvssatsnensenesdeaiadeasatiadenedeneenanenans 34 B Brazing sccincicaiiatnaananinsianixaxiceienenenadauiieinaceanananetiied EAEE ETETEA T AEE 35 C Removal and Replacement of COMpressSofr ccccccccccccceceeeeeeeeeesseeeeeeecneenennseeeeeees 36 D Removal and Replacement of Drier xicsscsccccatecasiciccveitee ees idee nee 37
12. Check and get spray tubes Water low and water level in recommended pressure pump will not start or water tank too low freeze cycle time is b Water Solenoid Valve 1 Dirty mesh filter or 1 Clean too short orifice and water level in water tank too low c Water System 1 Water leaks 1 Check connections for water leaks and replace 2 Clogged 3 Pump out check valve 3 Check assembly and leaking by clean 30 Possible Cause Remedy d Pump Motor 1 Motor winding opened 1 Replace 2 Bearing worn out 2 Replace 3 Wiring to pump motor 3 Check for loose connection or open and replace 4 Defective capacitor 4 Replace 5 Defective or bound 5 Replace and clean impeller 6 Mechanical seal worn 6 Check and replace out e Controller Board 1 Defective 1 See II B 5 Checking the Controller Board 6 Fan motor will a Fan Motor 1 Motor winding opened 1 Replace not start or is not 2 Bearing worn out 2 Replace operating e 3 Wiring to fan motor 3 Check for loose connection or open and replace 4 Defective capacitor 4 Replace 5 Fan blade bound 5 Check and replace b Controller Board 1 Defective 1 See II B 5 Checking the Controller Board 7 All components a Refrigerant 1 Undercharged 1 Check for leaks and run but no ice is recharge produced 2 Air or moisture 2 Replace drier and trapped recharge b Compressor 1 Defective valve 1 Replace c
13. G CYCLE TIME 70 21 80 27 90 32 min 100 38 HARVEST CYCLE TIME 70 21 80 27 90 32 min 100 38 HEAD PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 7 400 BTU h AT 90 F 32 C WT 70 F 21 C Note Pressure data is recorded at 5 minutes into freeze cycle The data not in bold should be used for reference only We reserve the right to make changes in specifications and design without prior notice 26 2 KM 320MWH APPROXIMATE ICE PRODUCTION PER 24 HR WATER TEMP F C 115 120 60 1 50 10 70 21 90 32 70 21 80 27 90 32 Ibs day _kg day 100 38 APPROXIMATE ELECTRIC 70 21 CONSUMPTION 80 27 90 32 watts 100 38 APPROXIMATE WATER 70 21 CONSUMPTION PER 24 HR 80 27 90 32 gal day m day 100 38 FREEZING CYCLE TIME 70 21 80 27 90 32 min 100 38 HARVEST CYCLE TIME 70 21 80 27 90 32 min 100 38 HEAD PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 5 700 BTU h AT 90 F 32 C WT 70 F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 1 000 BTU h AT 90 F 32 C WT 70 F 21 C WATER FLOW FOR CONDENSER 45 gal h AT 100 F 38 C WT 90 F 32 C PRESSURE DROP OF COOLING WATER LINE less than 10 PSIG Note Pressure data is recorded at 5 minutes into freeze cycle The data not in bold should be used for refe
14. Hoshizaki America Inc Modular Crescent Cuber Models KM 320MAH KM 320MWH SERVICE MANUAL A Superior Degree of Reliability www hoshizaki com Number 73132 Issued 24 2006 Revised 1 30 2006 IMPORTANT Only qualified service technicians should attempt to service or maintain this icemaker No such service or maintenance should be undertaken until the technician has thoroughly read this Service Manual HOSHIZAKI provides this manual primarily to assist qualified service technicians in the service and maintenance of the icemaker Should the reader have any questions or concerns which have not been satisfactorily addressed please call or write to the HOSHIZAKI Technical Support Department for assistance HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Attn HOSHIZAKI Technical Support Department Phone 1 800 233 1940 Technical Service 770 487 2331 Fax 1 800 843 1056 770 487 3360 Web Site www hoshizaki com NOTE To expedite assistance all correspondence communication MUST include the following information e Model Number e Serial Number e Complete and detailed explanation of the problem Please review this manual It should be read carefully before the icemaker is serviced or maintenance operations are performed Only qualified service technicians should service and maintain the icemaker This manual should be made available to the technician prior to service
15. Hot Gas Solenoid Valve 1 Continues to open in 1 Check and replace freeze cycle d Line Valve 1 Continues to close in 1 Check and replace freeze cycle e Water Supply Line 1 Condenser water 1 Check and get water cooled model pressure too low or off recommended pressure and pressure control opens and closes frequently f Water Solenoid Valve 1 Water solenoid valve 1 Check for water leaks with is wide open during icemaker off freeze B Evaporator is Frozen Up Possible Cause 1 Freeze cycle time is a Float Switch 1 Leads short circuit or 1 Check and replace too long defective switch 2 Float does not move 2 Clean or replace freely b Water Solenoid Valve 1 Diaphragm does not 1 Check for water leaks with close icemaker off 31 Possible Cause c Controller Board 1 Defective 1 See II B 5 Checking the Controller Board 2 All ice formed on 1 Scaled up a evaporator does not b t a Water Supply Line 1 Water pressure too 1 Check and get fall into bin in harvest low recommended pressure cycle c Water Filter System 1 Dirty Restricted 1 Replace filter d Water Solenoid Valve 1 Dirty mesh filter or 1 Clean orifice 2 Diaphragm does not 2 Check for water leaks with close icemaker off e Ambient and or water 1 Too cool 1 Increase temperature temperature f Line Valve 1 Continues to open in 1 Check operation in harvest harvest cycl
16. IT PROTECTION COMPRESSOR PROTECTION REFRIGERANT CIRCUIT PROTECTION LOW WATER PROTECTION ACCESSORIES SUPPLIED REQUIRED OPERATING CONDITIONS 115 60 1 8 2 A 5 Min Freeze AT 104 F WT 80 F 20A 20A Ambient WATER TEMP F Temp F 50 70 9 70 352 160 348 158 324 147 80 349 158 342 155 309 140 90 348 158 337 153 308 140 100 337 153 330 150 281 127 Crescent Cube 7 2 lbs 3 3 kg 360 pcs N A 90 70 F 70 50 F 730 5 2 730 5 0 57 16 8 103 29 4 528 157 327 93 22 x 27 3 8 x 30 5 16 560 x 695 x 770 mm Stainless Steel Galvanized Steel Rear Net 123 Ibs 56 kg Shipping 153 Ibs 70 kg Permanent Connection Inlet 1 2 FPT Outlet 3 4 FPT 3 8 OD Tube Float Switch Hot Gas and Water Thermistor and Timer Timer Controlled Overflow Pipe Pressure Regulator Thermostat Hermetic Model ASE32C3E CAA Water cooled Tube in tube type Vertical type Stainless Steel and Copper Thermostatic Expansion Valve R 404A 1 lb 0 8 oz 486g High 427PSIG Low 210PSIG High Voltage Cut out Internal Auto reset Overload Protector Internal Auto reset High Pressure Control Switch Float Switch N A Ice Storage Bin VOLTAGE RANGE 104 127 V AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 F WATER SUPPLY PRESSURE 10 113 PSIG Note We reserve the right to make changes in specifications and design without prior notice ll General Information A Co
17. Mode 1 Mode 2 Mode Thermistor z N a a a eNe N N ON 2 Float Switch fe E a Compressor OFFL___ Control LLL Switch in o ICE Heater O Bin Thermostat or Fe a ae o Pump Motor Pressure Fan Motor oh Switch amp Line Valve a Overheat Fan Motor Protect Condenser Unit ore Reset 4 ON Water Valve OFF 4 ON Hot Gas Valve OFF 1 The icemaker does not complete a defrost cycle in the first 2 or 3 minutes See II B 4 Controls and Adjustments n 24 To stand by cycle When control switch is turned OFF pressure switch is OFF or thermistor temperature exceeds t1 To freeze cycle From freeze cycle Too Low Temp Float Switch ON 3 Compressor OFF Heater Control Switch in OFF WASH Icemaking 5 Pump Motor OFF Drain amp Line Valve 7 Fan Motor Condenser ae OF ioe FF g Hot Gas Valve 1 The pump motor waits for 2 seconds before starting a drain cycle See II B 4 Controls and Adjustments 2 The icemaker does not complete a defrost cycle in the first 2 or 3 minutes See II B 4 Controls and Adjustments 25 D Performance Data 1 KM 320MAH APPROXIMATE ICE AMBIENT TEMP WATER TEMP F C FPC PRODUCTION PER 24 HR 70 21 80 27 90 32 Ibs day _kg day 100 38 APPROXIMATE ELECTRIC 70 21 CONSUMPTION 80 27 90 32 watts 100 38 APPROXIMATE WATER 70 21 CONSUMPTION PER 24 HR 80 27 90 32 gal day m day 100 38 FREEZIN
18. Switch Setting Frequency e Freeze Timer CAUTION Adjust to proper specification or the unit may not operate correctly The freeze timer is factory adjusted and no adjustment is required The setting determines the maximum allowed freeze time to prevent possible freeze up issues Time minutes orr ore 60 on ON 60 f Bin Control CAUTION When the ambient temperature is below 45 F 7 C the bin control thermostat operates to stop the icemaker even if the ice storage bin is empty When the thermostat is set in the prohibited range the icemaker operates continuously even if the ice storage bin is filled with ice Setting in the prohibited range might cause severe damage to the icemaker resulting in failure No adjustment is required under normal use as the bin control is factory adjusted Adjust it if necessary so that the icemaker stops automatically within 10 seconds after ice contacts the bin control thermostat bulb 5 Checking the Controller Board a Visually check the sequence with the icemaker operating b Visually check the controller board by using the following procedure 1 Adjust the defrost timer to minimum position Disconnect the thermistor from the controller board Connect a 1 5 to 3 5 kO resistor to connector K3 pins 1 and 2 and energize the unit After the 1 minute 5 second water supply cycle and the 2 minute 10 second defrost cycle the unit should start the freeze cycle
19. aning co Valve n gt l a m a a an Evaporator Drier Thermistor Insulation Strainer eh TSE EA AEN TRS SR O e ea a Hot Gas Vaive Discharge Line Access Valve Refrigerant Circuit Expansion Valve wae Water Circuit Drain Valve 21 2 KM 320MWH Condenser Water Regulating Valve Spray Tube E Water ae Couey Drain Op Water ili Supply Water Suppl pale S121 ils a sce Cleaning Co Valve f Evaporator Drier High Pressure Switch Thermistor Insulation Strainer A RG ED WP TERN We W UR UW Ee GEE W WR Ge Ge TU a Hot Gas Valve OO F a Tal Discharge Line Compressor Refrigerant Circuit Expansion Valve wea Water Circuit Drain Valve 22 B Wiring Diagram 1 KM 320MAH KM 320MWH TOH 031003 HAVA ANO BOH 03100 HIV AINO a0 LVINOJ JIL w T CF ri Og NAOUE 30 4010 WIA b 09 02E ShE Note Pressure Switch KM 320MWH Note Pressure Switch KM 320MAH PSIG 21 0 Cut out 384 PSIG 21 0 Cut out 412 Cut in 284 21 PSIG Cut in 327 21 PSIG 23 C Timing Chart When control switch is turned OFF pressure switch is OFF or thermistor temperature exceeds t1 From defrost cycle To defrost cycle If float switch is OFF Too High JHi Temp Too Low Temp Temp fo stand by WaterSuppy Mode Imode 2 Mode s Mode 4
20. c discharge It is especially important to touch the metal part of the unit when handling or replacing the board 3 Do not touch the electronic devices on the board or the back of the board to prevent damage to the board 4 Do not change wiring and connections Do not misconnect K3 K4 and K5 because the same connector is used for the thermistor and float switch K4 is not connected Always replace the whole board assembly when it goes bad Do not short out power supply to test for voltage Controller Board Nh o1 Part Number 2A1410 01 HOS 001A Control Products 10 Pin Features of Control Products E Controller Board a Maximum Water Supply Period 6 minutes Water solenoid valve opening in the defrost harvest cycle is limited by the defrost timer The water valve cannot remain open longer than the maximum period The water valve can close in less than six minutes if the defrost cycle is completed b Defrost Timer The defrost cycle starts when the float switch opens and completes the freeze cycle But the defrost timer does not start counting until the thermistor senses 48 F 9 C at the evaporator outlet The period from the end of the freeze cycle up to the point of the thermistor s sensing varies depending on the ambient and water temperatures c High Temperature Safety 127 7 F 53 4 C The temperature of the suction line in the refrigerant circuit is limited by the high temperature
21. charged 4 Condenser water 4 Check and get pressure too low or off recommended pressure water cooled model 5 Fan not operating 5 See chart A 6 except water cooled model 6 Refrigerant line or 6 Clean and replace drier components plugged c Overload Protector 1 Bad contacts 1 Check for continuity and replace 2 Voltage too low 2 Increase voltage 3 Refrigerant 3 Recharge overcharged or undercharged 4 Line valve continues 4 Check line valve s to close in freeze cycle operation in freeze cycle and overload protector and replace operates d Starter 1 Check and replace 2 Coil winding opened 2 Replace e Start Capacitor or Run 1 Defective 1 Replace Capacitor f Magnetic Contactor 1 Bad contacts 1 Check for continuity and replace 2 Coil winding opened 2 Replace g Compressor 1 Wiring to compressor 1 Check for loose connection or open and replace 2 Defective 2 Replace 3 Protector tripped 3 Reduce temperature h Controller Board 1 Defective 1 See II B 5 Checking the Controller Board Water Regulator 1 Set too high 1 Adjust lower 4 Water continues to a Water Solenoid Valve 1 Diaphragm does not 1 Check for water leaks with be supplied in freeze close icemaker off cycle b Controller Board 1 Defective 1 See II B 5 Checking the Controller Board 5 No water comes from a Water Supply Line 1 Water pressure too 1
22. de valve and high side valve on the service manifold 5 Disconnect the vacuum pump and attach a refrigerant service cylinder to the high side line Remember to loosen the connection and purge the air from the hose See the nameplate for the required refrigerant charge Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No 700 88 be used 6 A liquid charge is recommended for charging an R 404A system Invert the service cylinder Open the high side service manifold valve 7 Allow the system to charge with liquid until the pressures balance 34 8 If necessary add any remaining charge to the system through the low side Use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low side access port with the unit running 9 Close the two refrigerant access valves and disconnect the hoses and service manifold 10 Cap the access valves to prevent a possible leak B Brazing DANGER 1 Refrigerant R 404A itself is not flammable at atmospheric pressure and temperatures up to 176 F 2 Refrigerant R 404A itself is not explosive or poisonous However when exposed to high temperatures open flames R 404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous 3 Always recover the refrigerant and store it in an approved container Do not discharge the refrigerant into the atmosphere 4 Do not use silver a
23. e cycle and replace g Thermistor 1 Out of position or See V H Removal loose attachment and Replacement of Thermistor h Controller Board 1 Defrost timer is set Adjust longer referring too short to II B 4 Controls and Adjustments b Defrost Timer 2 Defective 2 See II B 5 Checking the Controller Board 3 Other a Spray Tubes 1 Clogged 2 Out of position 2 Place in position b Water System c d ion Expansion Valve 1 Bulb out of position or 1 Place in position loose attachment 2 Replace e Hot Gas Solenoid Valve 1 Coil winding opened 1 Replace 2 Plunger does not 2 Replace move 3 Wiring to hot gas 3 Check for loose valve connection or open and replace Refrigerant 1 Undercharged 1 Check for leaks and recharge f Water Supply Line 1 Too small requires 1 Increase water line size 3 8 OD line dedicated per machine g Water Filter if installed 1 Flow rate too small 1 Replace with filter that has larger flow rate 32 C Low Ice Production Possible Cause 1 Freeze cycle time is a See chart A 3 and check dirty air filter or condenser ambient or water long temperature water pressure water regulator and refrigerant charge b See chart B 1 and check float switch water solenoid valve and controller board 2 Harvest cycle time is a See chart B 2 and check controller board thermistor evaporator ambient and or water tempera
24. e adjustment screw counterclockwise See Fig 2 3 Check that the pressure or the condenser drain temperature holds a stable setting Adjustment Screw Adjustment Screw CW Higher CCW Lower Top View 44 VI Cleaning and Maintenance Instructions IMPORTANT Ensure all components fasteners and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment A Preparing the lcemaker for Long Storage WARNING When shutting off the icemaker for an extended time drain out all water from the water tank and remove the ice from the storage bin The storage bin should be cleaned and dried Drain the icemaker to prevent damage to the water supply line at sub freezing temperatures using air or carbon dioxide Shut off the icemaker until the proper ambient temperature is resumed When the icemaker is not used for two or three days it is sufficient to only move the control switch to the OFF position unless the icemaker will be at sub freezing temperatures 1 On water cooled model only first remove the water from the water cooled condenser 1 Remove the front panel 2 Move the control switch on the control box to the OFF position 3 Wait 3 minutes 4 Move the control switch to the ICE position 5 Allow 5 minutes for the icemaker to fill with water and the water pump to start operating 6 Close the water cooled condenser water supply line shut off valve 7 Open the
25. e all components fasteners and thumbscrews are securely in place after the equipment is serviced IMPORTANT The Polyol Ester POE oils used in R 404A units can absorb moisture quickly Therefore it is important to prevent moisture from entering the system when replacing or servicing parts Always install a new drier every time the sealed refrigeration system is opened Do not leave the system open for longer than 5 minutes when replacing or servicing parts A Service for Refrigerant Lines 1 Refrigerant Recovery The icemaker unit is provided with two refrigerant access valves one on the low side and one on the high side line Using proper refrigerant practices recover the refrigerant from the access valves and store it in an approved container Do not discharge the refrigerant into the atmosphere 2 Evacuation and Recharge R 404A 1 Attach charging hoses a service manifold and a vacuum pump to the system Be sure to connect charging hoses to both high and low side access valves IMPORTANT The vacuum level and vacuum pump may be the same as those for current refrigerants However the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for POE oils 2 Turn on the vacuum pump Never allow the oil in the vacuum pump to flow backward 3 Allow the vacuum pump to pull down to a 29 9 Hg vacuum Evacuating period depends on pump capacity 4 Close the low si
26. eeeeeeeeeeeeeeeees 49 SAVANE TAINO oases E enmcccens niece cus eenadea E E 50 I Specifications A KM 320MAH air cooled AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR lbs day kg day Reference without marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 lbs WATER gal 24HR gal 100 Ibs EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY DRAIN CUBE CONTROL SYSTEM HARVESTING CONTROL SYSTEM ICE MAKING WATER CONTROL COOLING WATER CONTROL BIN CONTROL SYSTEM COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE P C BOARD CIRCUIT PROTECTION COMPRESSOR PROTECTION REFRIGERANT CIRCUIT PROTECTION LOW WATER PROTECTION ACCESSORIES SUPPLIED REQUIRED OPERATING CONDITIONS 115 60 1 9 7 A 5 Min Freeze AT 104 F WT 80 F 20A 20A Ambient WATER TEMP F Temp F 50 70 90 70 325 147 311 141 287 130 80 315 143 293 133 265 120 90 311 141 278 126 251 114 100 304 138 272 123 226 103 Crescent Cube 7 2 Ibs 3 3 kg 360 pcs N A 90 70 F 70 50 F 800 6 9 750 5 5 51 18 4 117 35 9 22 x 27 3 8 x 30 5 16 560 x 695 x 770 mm Stainless Steel Galvanized Steel Rear Net 123 Ibs 56 kg Shipping 153 Ibs 70 kg Permanent Connection
27. els in their correct positions 14 Turn on the power supply G Removal and Replacement of Evaporator IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repairs or replacement have been made 1 Turn off the power supply 2 Remove the panels and the top insulation over the evaporator 3 Recover the refrigerant and store it in an approved container 4 Remove the spray tubes and the insulations at the U shaped notch where the refrigeration tubings pass through the molded chassis 5 Remove the insulation tube and disconnect the evaporator inlet tubing at the tee next to the expansion valve 6 Lift up the evaporator and disconnect the evaporator outlet tubing 7 Install the new evaporator 9 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 10 Evacuate the system and charge it with refrigerant See the nameplate for the required refrigerant charge 11 Replace the removed parts in the reverse order of which they were removed 8 Install the new drier 12 Replace the top insulation and the panels in their correct positions 13 Turn on the power supply 39 H Removal and Replacement of Thermistor CAUTION 1 Fragile handle very carefully 2 Always use a recommended sealant High Thermal Conductive Type Model KE4560RTV manufactured by SHINETSU SILICONE Part Code 60Y000 11 or
28. erate unless the cleaning valve is completely closed 17 Replace the front panel in its correct position 18 Turn on the power supply to fill the water tank with water 19 Turn off the power supply after 3 minutes 20 Remove the front panel and fully open the cleaning valve 22 23 Turn on the power supply to rinse off the cleaning solution Replace the front panel in its correct position 21 Move the control switch to the WASH position 24 Turn off the power supply after 5 minutes 25 Remove the front panel 26 Remove one end of the pump tubing Drain the water tank Replace the pump tubing in its correct position 27 Repeat steps 15 through 26 three more times to rinse thoroughly Note If you do not sanitize the icemaker go to step 10 in 2 Sanitizing Procedure 2 Sanitizing Procedure Following Cleaning Procedure 1 Dilute a 5 25 sodium hypochlorite solution chlorine bleach with water add 1 5 fl oz of sanitizer to 3 gal of water 2 Remove the insulation panel 3 Pour the sanitizing solution into the water tank 4 Replace the insulation panel and the front panel in their correct positions Note Make sure that the control switch is in the WASH position and the cleaning valve is open 5 Turn on the power supply and start the sanitizing process 6 7 8 Remove one end of the pump tubing Drain the water tank Replace the pump tubing in its correct position Turn off
29. lloy or copper alloy containing arsenic 5 Do not use R 404A as a mixture with pressurized air for leak testing Refrigerant leaks can be detected by charging the unit with a little refrigerant raising the pressure with nitrogen and using an electronic leak detector Note All brazing connections inside the evaporator case are clear paint coated Sandpaper the brazing connections before unbrazing the components Use a good abrasive cloth to remove coating 35 C Removal and Replacement of Compressor IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made Note When replacing a compressor with a defective winding be sure to install the new start capacitor and start relay supplied with the replacement compressor Due to the ability of the POE oil in the compressor to absorb moisture quickly the compressor must not be opened more than 15 minutes for replacement or service Do not mix lubricants of different compressors even if both are charged with R 404A except when they use the same lubricant 1 Turn off the power supply 2 Remove the panels 3 Recover the refrigerant and store it in an approved container 4 Remove the terminal cover on the compressor and disconnect the compressor wiring 5 Remove the discharge and suction pipes using brazing equipment 6 Remove the hold down bolts washers and r
30. next to the evaporator outlet Temperature F Temperature C Resistance kQ 14 401 10 613 Pp 2000 o 32 16383 Check a thermistor for resistance by using the following procedure 1 Disconnect the connector K3 on the board 2 Remove the thermistor See V H Removal and Replacement of Thermistor 3 Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes 4 Check for a resistance between thermistor leads Normal reading is within 3 5 to 7 KQ Replace the thermistor if it exceeds the normal reading b Defrost Timer No adjustment is required under normal use as the defrost timer is adjusted to the suitable position However if necessary when all the ice formed on the evaporator does not fall into the bin in the harvest cycle adjust the defrost timer to longer setting by adjusting the dip switch No 1 amp 2 on the controller board Time seconds Dorr orr eo ON OFF 90 17 c Drain Timer The drain timer is factory adjusted and no adjustment is required Dip Switch Setting Time seconds T1 Time to drain the water tank T2 Time to restrain defrost completion d Drain Counter The drain counter is factory adjusted to drain the water tank every 10 cycles and no adjustment is required However where water quality is bad and the icemaker needs a pump drain more often the drain counter can be adjusted as shown in the table below Dip
31. nge LED marked H TIMER lights up defrost gt 20 min Check for open thermistor HGV not opening TXV leaking by low charge or inefficient compressor 3 Freeze Backup Timer Yellow LED marked F TIMER lights up freeze gt 60 min Check for F S stuck closed up WV leaking by HGV leaking by TXV not feeding properly low charge or inefficient compressor To manually reset the above safeties press the white alarm reset button with the power supply on Low Voltage 92Vac or less 7 High Voltage Red LED will turn off if voltage protection control voltage operates gt 147Vac 5 The voltage safety automatically resets when voltage is corrected The output test switch S3 provides a relay sequence test With power OFF place S3 ON and switch power to ICE The correct lighting sequence should be none 2 3 4 1 amp 4 normal sequence every 5 seconds S3 should remain in the OFF position for normal operation 11 The application switch located between relay X3 amp X4 must be set to match the original board application Place this switch in the ALP position if there is no white wire supplied to the K1 connector If there is a white wire place the switch in the C position If this switch is placed in the wrong position either the compressor contactor will remain energized with the control switch OFF or the unit will not start The dip switches should be adjusted per the adjustment chart published in the Tech Specs
32. nstruction 1 KM 320MAH air cooled Spray Tubes Expansion Valve Control Switch Water Supply Inlet Evaporator Hot Gas Valve Koo ff A ff Cleaning Valve y a f Cy face SE Condenser Bin Control i Thermostat Float Switch Water Pump Compressor Control Box shown transparent to allow view of other components 2 KM 320MWH water cooled Spray Tubes Expansion Valve Control Switch Water Supply Inlet Hot Gas Valve Evaporator Water Regulator LLY sA Cleaning Valve Condenser q E io e ra Lh N DE Bin Control p rua i a i Thermostat T A Sal Float Switch BA NNa Water Pump Drier Compressor Control Box shown transparent to allow view of other components B Controller Board 1 Solid State Control e A HOSHIZAKI exclusive solid state control is employed in KM 320MAH and KM 320MWH Modular Crescent Cubers e A printed circuit board hereafter called controller board includes a stable and high quality control system e All models are pretested and factory adjusted 2 Controller Board CAUTION Fragile handle very carefully Acontroller board contains integrated circuits which are susceptible to failure due to stati
33. owards you 5 Remove one end of the pump tubing see Fig 4 Drain the water tank Replace the pump tubing in its correct position 6 In bad or severe water conditions clean the float switch assembly as described below Otherwise continue to step 7 a Remove the float switch assembly from the mounting bracket and remove the rubber boot from the bottom of the assembly b Remove the retainer rod from the bottom of the float switch assembly then remove the float Be careful not to bend the retainer rod excessively when removing it c Wipe down the float switch assembly s housing shaft float and retainer rod with cleaning solution Wipe the inside of the rubber boot with cleaning solution d Reassemble the float switch assembly and replace it and the rubber boot in their correct positions 7 Pour the cleaning solution into the water tank 8 Fully open the cleaning valve on the left side wall of the machine compartment 9 Move the control switch on the control box to the WASH position 0 Replace the insulation panel and the front panel in their correct positions Turn on the power supply and start the washing process Turn off the power supply after 30 minutes Remove one end of the pump tubing Drain the water tank Replace the pump tubing in its correct position 1 2 3 Remove the front panel 4 48 15 Move the control switch to the ICE position 16 Close the cleaning valve Note The icemaker will not op
34. rence only We reserve the right to make changes in specifications and design without prior notice 27 IV Service Diagnosis A No Ice Production 1 The icemaker will not a Power Supply 1 OFF position 1 Move to ON position 3 Bad contacts 3 Check for continuity and replace 4 Voltage too high 4 Check and get recommended voltage b Fuse Inside fused 1 Blown 1 Check for short circuit and disconnect if any replace c Control Switch 1 OFF position 1 Move to ICE position 2 Bad contacts 2 Check for continuity and replace d Bin Control Thermostat 1 Tripped with bin filled 1 Remove ice with ice 2 Ambient temperature 2 Increase ambient too cool temperature 3 Set too warm 3 See II B 4 Controls and Adjustments f Bin Control 4 Bulb out of position 4 Place in position 5 Bad contacts or leaks 5 Check for continuity and in bulb replace e High Pressure Control 1 Bad contacts 1 Check for continuity and replace f Transformer 1 Thermal fuse blown or 1 Replace coil winding opened g Wiring to Controller 1 Loose connections or 1 Check for continuity and Board open replace h Thermistor 1 Leads short circuit 1 See II B 4 Controls and or open and high Adjustments a Defrost temperature safety Control operates i Hot Gas Solenoid Valve 1 Continues to open in 1 Check for power off in freeze cycle and high freeze cycle and replace temperature safety
35. s l MPORTANT Board never accepts freeze completion signal within the first 5 minutes in freeze cycle 14 2nd Cycle and after with no pump drain IMPORTANT Freeze cycle time is limited by the freeze timer factory setting even if the float switch does not open 1 Float switch opens and signals to complete freeze cycle 2 Thermistor reads 48 F 9 Defrost timer starts counting Water Valve Hot Gas Valve 1 Defrost Cycle IMPORTANT Water valve opening is limited to 6 minutes Pump Fan amp Line Valve 4 After the first 5 minutes in freeze cycle 3 Defrost timer stops counting Ready to complete freeze cycle when float Defrost cycle is completed and switch circuit opens freeze cycle starts IMPORTANT IMPORTANT Board never accepts freeze completion signal within the first 5 minutes in freeze cycle 1 Board never accepts defrost completion signal 15 within the first 2 minutes in defrost cycle 2 Defrost cycle time is limited to 20 minutes even if defrost timer does not stop counting 4 Controls and Adjustments The dip switch is factory adjusted to the following positions Dip Switch No 1 2 3 4 5 6 7 28 9 10 KM 320MAH OFF OFF OFF ON ON ON OFF OFF OFF OFF Switch Nos 1 and 2 Used for adjustment of the defrost timer The defrost timer starts counting when the thermistor reads a certain tempera
36. s and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment WARNING HOSHIZAKI recommends cleaning this unit at least once a year More frequent cleaning however may be required in some existing water conditions To prevent injury to individuals and damage to the icemaker do not use ammonia type cleaners Always wear liquid proof gloves to prevent the cleaning and sanitizing solutions from coming into contact with skin IMPORTANT The cleaning valve is used to allow solution flow to the inside of the evaporator during the cleaning and sanitizing operation It should be closed for all icemaking operation The compressor will not operate unless this valve is completely closed To open the cleaning valve the valve handle should be parallel to the valve body To close the valve the valve handle should be at a right angle to the valve body Closed Position Open Position 47 1 Cleaning Procedure 1 Dilute approximately 16 fl oz of Hoshizaki Scale Away with 3 gal of warm water 2 Remove all ice from the evaporator and the storage bin Note To remove cubes on the evaporator turn off the power supply and turn it on after 3 minutes The defrost cycle starts and the cubes will be removed from the evaporator 3 Turn off the power supply 4 Remove the front panel and the base cover and then remove the insulation panel by lifting up the panel slightly and pulling it t
37. safety During the defrost cycle the evaporator temperature rises The thermistor senses 48 F 9 C and starts the defrost timer After the defrost timer counts down to zero the normal freeze cycle begins If the evaporator temperature continues to rise the thermistor will sense the rise in temperature and at 127 7 F 53 4 C the thermistor operates the high temperature safety This high temperature safety shuts down the circuit and the icemaker automatically stops This high temperature safety protects the unit from excessive temperature The control board will beep every 3 seconds The white reset button on the control board must be pressed with power on to reset the safety d Low Water Safety If the pump motor is operated without water the mechanical seal can fail To prevent this type of failure the controller board checks the position of the float switch at the end of the initial one minute water fill cycle and at the end of each defrost cycle If the float switch is in the up position electrical circuit closed the controller board changes to the ice making cycle If the float switch is in the down position electrical circuit open the controller board changes to a one minute water fill cycle before starting the ice making cycle This method allows for a low water safety shut down to protect the water pump from mechanical seal failure For water cooled model if the water is shut off the unit is protected by the high pressure swi
38. taching the pump motor assembly to the base then remove the pump motor assembly 9 Remove the screw attaching the pump motor to the pump motor bracket 10 Remove the screws attaching the pump housing to the pump motor Remove the housing and check the impeller 11 If the impeller is defective install a new impeller 12 Install the new motor or new parts and replace the removed parts in the reverse order of which they were removed 13 Turn on the power supply and check for leaks 14 Replace the base cover in its correct position 15 Replace the front panel in its correct position L Removal and Replacement of Spray Tubes 1 2 3 4 5 6 Turn off the power supply Remove the front panel and the insulation panel Remove the rubber hoses from the spray tubes water supply pipe Release the clamps and disconnect the rubber hoses Remove the spray tubes by squeezing the side tabs wa a Ta arr a Ta hf Install the new spray tubes and replace the removed parts in the reverse order of which they were removed 7 Replace the panels in their correct positions 8 Turn on the power supply 42 M Removal and Replacement of Water Regulating Valve Water Cooled Model Only IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Turn off the power supply 2 Close the water supply line sh
39. tch e High Voltage Cut out The maximum allowable supply voltage of this icemaker is limited by the high voltage cut out If miswiring especially on single phase 3 wire models causes excessive voltage on the controller board the high voltage cut out shuts down the circuit in 3 seconds and the icemaker automatically stops When the proper supply voltage is resumed the icemaker automatically starts running again The control board will signal this problem using 7 beeps every 3 seconds f LED Lights and Audible Alarm Safeties The red LED indicates proper control voltage and will remain on unless a control voltage problem occurs At startup a 5 second delay occurs while the board conducts an internal timer check A short beep occurs when the power switch is turned ON or OFF 10 The green LEDs 1 4 represent the corresponding relays and energize and sequence 5 seconds from initial startup as follows s St LED Time LEDs are Lit equence Ste P 1 Minute Fill Cycle 4 60 seconds Harvest Cycle 1 4 and 2 3 to 5 minutes Freeze Cycle 30 to 35 minutes Reverse Pump Out 1 3 and 2 factory setting LED 1 Comp LED 2 HGV CFM LED 3 PM LED 4 WV The built in safeties shut down the unit and have alarms as follows very 3 sec High Evaporator Temp Check for defrost problem stuck HGV temperature gt 127 F jor relay hot water entering unit stuck 53 C headmaster or shorted thermistor Defrost Backup Timer Ora
40. ted and 5 After the first 5 minutes in freeze cycle Ready to complete freeze cycle when float freeze cycle starts IMPORTANT 1 Board never accepts defrost completion signal within the first 2 minutes in defrost cycle 2 Defrost cycle time is limited to 20 minutes even if defrost timer does not stop counting switch circuit opens IMPORTANT Board never accepts freeze completion signal within the first 5 minutes in freeze cycle 13 2nd Cycle and after with pump drain IMPORTANT Freeze cycle time is limited by the freeze timer factory setting even if the float switch does not 2 Drain timer stops counting Pump drain is completed open 1 Float switch opens and signals to complete freeze cycle Drain timer starts counting Drain Pump Hot Gas Valve Defrost Cycle 3 3 Thermistor reads 48 F 9 C Defrost timer starts counting Freeze j _ Cycle Q y O E O gt g IMPORTANT amp Pump Fan amp rat Water valve opening is Line Valve limited to 6 minutes 4 Defrost timer stops counting Defrost cycle is completed and freeze cycle starts IMPORTANT 1 Board never accepts defrost completion signal within the first 2 minutes in defrost cycle 2 Defrost cycle time is limited to 20 minutes even if defrost timer does not stop counting 5 After the first 5 minutes in freeze cycle Ready to complete freeze cycle when float switch circuit open
41. the power supply after 15 minutes Remove the front panel 9 Repeat steps 15 through 26 in 1 Cleaning Procedure two times to rinse thoroughly 10 Close the cleaning valve 11 Move the control switch to the ICE position 12 Replace the front panel and the base cover in their correct positions 13 Clean the storage bin with water 14 Turn on the power supply and start the automatic icemaking process 49 C Maintenance IMPORTANT This icemaker must be maintained individually referring to the instruction manual and labels provided with the icemaker 1 Stainless Steel Exterior To prevent corrosion wipe the exterior occasionally with a clean and soft cloth Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up 2 Storage Bin and Scoop e Wash your hands before removing ice Use the plastic scoop provided e The storage bin is for ice use only Do not store anything else in the bin e Keep the scoop clean Clean it by using a neutral cleaner and rinse thoroughly e Clean the bin liner by using a neutral cleaner Rinse thoroughly after cleaning 3 Condenser except water cooled model Check the condenser once a year and clean the coil if required by using a brush or vacuum cleaner More frequent cleaning may be required depending on the location of the icemaker 50
42. ture water supply line water solenoid valve line valve and gas valve D Abnormal Ice Possible Cause 1 Small cubes a Ice Cube Guide 1 Out of position 1 Place in position Circulated water falls into bin b See chart A 5 and check water supply line wate system pump motor and controller board 2 Cloudy or irregular a See chart B 1 and B 3 and check float switch water solenoid valve cubes controller board spray tubes water system refrigerant charge and expansion valve b Spray Guide c Water Quality 1 High hardness or 1 Install a water softener or contains impurities filter E Other Possible Cause 1 lcemaker will not stop a Bin Control Thermostat 1 Set too cold 1 Adjust warmer when bin is filled with ice 2 Defective 2 Replace 2 Abnormal noise a Pump Motor 1 Bearings worn out 1 Replace b Fan Motor 1 Bearings worn out 1 Replace 2 Fan blade deformed 2 Replace fan blade 3 Fan blade does not 3 Replace move freely r solenoid valve water c Compressor 1 Bearings worn out or 1 Replace cylinder valve broken 2 Mounting pad out of 2 Reinstall position d Refrigerant Lines 1 Rub or touch other 1 Replace lines or surfaces lice in storage bin a Bin Drain 1 Plugged often melts b lcemaker and Bin 1 Drains not run 1 Separate the drain lines separately 33 V Removal and Replacement of Components IMPORTANT Ensur
43. ture at the evaporator outlet Switch Nos 3 and 4 Used for adjustment of the drain timer When a freeze cycle is completed the pump motor stops and the icemaker resumes operation in 2 seconds Then the pump motor drains the water tank for the time determined by the drain timer The drain timer also determines the time to restrain completion of a defrost cycle i e the minimum defrost time Switch Nos 5 and 6 Used for adjustment of the drain counter The pump motor drains the water tank at the frequency determined by the drain counter Switch Nos 7 and 8 Used only for checking the controller board Usually set in OFF position Switch Nos 9 and 10 Freeze Timer 7 Used for adjustment of freeze timer Control Board Check only OFF o z z z The freeze timer determines maximum Drain Counter freeze cycle time Upon termination of freeze timer machine initiates the harvest cycle After 2 consecutive timer Defrost Timer the terminations machine will shut down possibly indicating a problem LOS on 16 a Defrost Control A thermistor semiconductor is used for a defrost control sensor The resistance varies depending on the suction line temperatures The thermistor detects the temperature of the evaporator outlet to start the defrost timer No adjustment is required If necessary check for resistance between thermistor leads and visually check the thermistor mounting located on the suction line
44. ubber grommets 7 Slide and remove the compressor Unpack the new compressor package Install the new compressor 8 Attach the rubber grommets of the prior compressor 9 Sandpaper the suction discharge and process pipes 10 Place the compressor in position and secure it using the bolts and washers 11 Remove plugs from the suction discharge and process pipes 12 Braze the process suction and discharge lines do not change this order while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG 13 Install a new drier 14 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 15 Evacuate the system and charge it with refrigerant See the nameplate for the required refrigerant charge 16 Connect the terminals and replace the terminal cover in its correct position 17 Replace the panels in their correct positions 18 Turn on the power supply 36 D Removal and Replacement of Drier IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Turn off the power supply 2 Remove the panels 3 Recover the refrigerant and store it in an approved container 4 Remove the drier 5 Install the new drier with the arrow on the drier in the direction of the refrigerant flow Use nitrogen gas at a pressure of 3 to 4 PSIG when brazing the tubings 6 Check for leaks using nitrogen
45. ure it with clamps and to insulate it 11 Place the new set of expansion valve covers in position 12 Replace the panels in their correct positions 13 Turn on the power supply F Removal and Replacement of Hot Gas Valve and Line Valve CAUTION Always use a copper tube of the same diameter and length when replacing the hot gas lines otherwise the performance may be reduced IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 2 3 4 5 6 Turn off the power supply Remove the panels Recover the refrigerant and store it in an approved container Remove the screw and the solenoid Disconnect the hot gas valve or line valve using brazing equipment wae a Ta ara Ta ef Install the new valve WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating Do not braze with the valve body exceeding 250 F 121 C 38 7 Install a new drier 8 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 9 Evacuate the system and charge it with refrigerant See the nameplate for the required refrigerant charge 10 Cut the leads of the solenoid allowing enough lead length to reconnect using closed endconnectors 11 Connect the new solenoid leads 12 Attach the solenoid to the valve body and secure it with a screw 13 Replace the pan
46. ut off valve 3 Remove the panels 4 Recover the refrigerant and store it in an approved container 5 Disconnect the capillary tube at the condenser outlet using brazing equipment 6 Disconnect the flare connections of the valve 7 Remove the screws and the valve from the bracket 8 Install the new valve and braze the capillary tube 9 Install a new drier 10 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 11 Evacuate the system and charge it with refrigerant See the nameplate for the required refrigerant charge Connect the flare connections Open the water supply line shut off valve 12 13 14 Check for water leaks 15 Replace the panels in their correct positions 16 Turn on the power supply 43 N Adjustment Of Water Regulating Valve Water Cooled Model Only The water regulating valve also called water regulator is factory adjusted No adjustment is required under normal use Adjust the water regulator if necessary using the following procedure 1 Attach a pressure gauge to the high side line of the system Or prepare a thermometer to check for the condenser drain temperature 2 Rotate the adjustment screw by using a flat blade screwdriver so that the pressure gauge shows 270 PSIG or the thermometer reads 104 to 115 F 5 minutes after a freeze cycle or icemaking process starts When the pressure exceeds 270 PSIG or the condenser drain temperature exceeds 115 F rotate th
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