Service Manual
Contents
1. Ni e umno amp Tu 25920 Mogno D Dl 0 700 00 e d 330 540 540 540 5350 mwzze syt ZON 7300W 4 CS ONI LISS m a8 350 50 NO 10 330 30 590 gt ON 6 ON V EON Z ON 1135 211 22 Performance Data 1 KMS 822MLH with SRK 10H APPROXIMATE ICE AMBIENT TEMP PRODUCTION PER 24 HR CFPC 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 m3 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 SUCTIO2. 31 1 Float Switch CCC P 31 a Float SWEN c 32 E 33 F Diagnasuo Charts ee eee 34 TING ICS PROGUGHOMN 34 2 Freeze U ss 35 3 Low lce ProdUCHOM NNI 37 V Replacement of Components ss 38 A Service for Refrigerant NER 38 1 Retigerant RECOV OU cm 38 28 10 74 39 3 Evacuation and Recharge 754048 39 Important Notes for Component 41 MIL Cheap and Malhitelal eee tener ee ice agas 42 A Cleaning and Sanitizing Instructions srsccccpeperacdaranoraneeatavananaseateaigsemssbabemenensmusesteeeespemneanes 42 1 eli sskuies o ii aea KOE Ee a eer ere 43 2 Sanitizing Procedure Following Cleaning Procedure 45 qus T 46 C Preparing the Icemaker for Long Storage 46 Important Safety Information Throughout this manual notices appear to bring your attention to situations which could result in death serious injury or damage to the unit WARNING Indicates a hazardous situation which could result in death or serious injury CAUTION Indicates a situa
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4. 1 Fill Cycle Harvest Cycle Comp FMRs WV 12 minutes 20 minutes 3 to 5 minutes HGVs Harvest Pump Timer 1 3 2 Comp FMRs DVR 0 seconds 50 seconds harvest pump timer Freeze Cycle 1 Comp FMRs PM 15 minutes freeze timer 30 to 35 minutes LLVs setting Pump Out Cycle 1 4 3 2 Comp FMRs 5 10 seconds 20 seconds pump out timer Wv DVR PM DV setting The built in safeties shut down the unit and have alarms as listed below No of Beeps High Evaporator Temp Check for harvest problem stuck HGV hot water temperature gt 127 F 53 C entering unit stuck HM or shorted thermistor 2 Harvest Backup Timer Check for open thermistor HGV not opening TXV or harvest gt 20 min for two cycles LLVs leaking by low charge or inefficient Comp in a row Freeze Timer Check for F S stuck closed up WV leaking by HGVs freeze gt freeze timer setting for leaking by PM not pumping TXV not feeding properly two cycles in a row LLVs not opening low charge HM not bypassing or Timer is factory set using S4 dip inefficient Comp switch 9 amp 10 To reset the above safeties press the ALARM RESET button with the power supply on Low Voltage Red LED turns off if voltage protection operates 92Vac 5 or less The control voltage safeties automatically reset when High Voltage voltage is corrected 147Vac 5 or more Legend Comp compressor DV drain valve DVR drain valve
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6. LED 1 X1 Relay Compressor Comp Fan Motors Remote Liquid Line 1 2 5 LED1 00078109 WHITE Connector Harvest Control thermistor RED K4 Connector Bin Control T BLACK 5 Connector Float Switch 5 e Label 10 control board revision level indicated on label on side of relay K1 Ten Pin Connector Pins 1 through 10 1 9 Magnetic Contactor 2 Hot Gas Valves HGVs KMS and SRK 3 Liquid Line Valves LLVs KMS and SRK 4 Pump Motor icemaking 5 Drain Valve Relay DVR pump motor during harvest pump timer and pump motor and drain valve during pump out 6 Inlet Water Valve WV 7 10 Component Power Supply 8 Open Valves LLVs K2 Connector Control Transformer G Control Board Part Number 2A3792 01 15 2 LED Lights and Audible Alarm Safeties At startup a 5 second delay occurs while the control board conducts an internal timer check A beep occurs when the control switch is moved to the ICE position The red LED indicates proper control voltage and remains on unless a control voltage problem occurs The green LEDs 1 through 4 energize and sequence from initial startup as listed in the table below Note that the order of the LEDs from the outer edge of the control board is 1 4 3 2 For details see Sequence of Operation i Ti LED Sequence Step LED Energized ime LEDs are On Components Min
7. 4 Replace the insulation panel and the front panel in their correct positions Note Make sure the control switch is in the WASH position and the cleaning valve is open 5 6 7 8 Turn on the power supply to start the sanitizing process Turn off the power supply after 15 minutes Remove the front panel 2 a Remove the insulation panel Remove cube guide then remove cube guide Remove the overflow cap overflow pipe and water shield 9 Remove the drain plug Allow the water tank to drain then replace the drain plug in its correct position 10 Replace the water shield overflow pipe overflow cap cube guide A cube guide B and insulation panel in their correct positions 11 Repeat steps 17 through 30 in 1 Cleaning Procedure two times to rinse thoroughly 12 Close the cleaning valve 14 15 Clean the dispenser unit storage bin liner using a neutral cleaner Rinse thoroughly after cleaning 13 Move the control switch to the ICE position Replace the front panel in its correct position 16 Turn on the power supply to start the automatic icemaking process 45 Maintenance This icemaker must be maintained individually referring to the instruction manual and labels provided with the icemaker A WARNING 1 Only qualified service technicians should attempt to service this icemaker 2 Disconnect power before servicing 1 Stainless Steel Exterior To prevent corrosion wipe
8. Ib 15 9 oz 6800 g Condensing Unit 14 Ib 8 8 oz 6600 g Icemaker 0 Ib 7 1 oz 200 9 High 467 PSIG Low 230 PSIG VOLTAGE RANGE 187 253VAC AMBIENT TEMP Outdoor Use 20 122 Leg 2 pcs Hex Head Bolt w Washer 8 16 16 pcs Hex Nut M8 16 pcs Compatible KMS Note We reserve the right to make changes in specifications and design without prior notice General Information A Construction 1 lcemaker Spray Guide Water Supply Inlet Inlet Water Fs Spray Tube Valve Hot Gas Valve HGV Expansion Valves TXV High Side Service Valve Evaporator Control Box Liquid Line Valve LLV iL Low Side Service Valve 54 E Drain Valve Insulation Float Switch Pump Motor Control Switch Cleaning Valve Fuse KMS Bin Control Cover Bin Control Extension Bracket Bin Control 2 Condensing Unit Condenser Condenser Fan Motors FMR Hot Gas Valve HGV Headmaster CPR Liquid Line Control Box vane ILIN Low Side Service Valve High Side ee Service Valve Em Fuse SRK Receiver sel High Pressure Switch Compressor Accumulator Discharge Thermostat 10 Sequence of Operation Sequence Cycles and Shutdown The steps in the sequence are as outlined below Whe
9. position 20 Turn on the power supply to fill the water tank with water 21 Turn off the power supply after 3 minutes 22 Remove the front panel and fully open the cleaning valve 23 Move the control switch to the WASH position 24 Replace the front panel in its correct position 25 Turn on the power supply to rinse off the cleaning solution 26 Turn off the power supply after 5 minutes 27 Remove the front panel 28 Remove the insulation panel Remove Overflow Cap cube guide B then remove cube guide A Remove the overflow cap overflow pipe and water shield Overflow Pipe 29 Remove the drain plug Allow the water tank to drain then replace the drain plug in its correct position 30 Replace the water shield overflow pipe Drain Water overflow cap cube guide A cube guide Plug Shield B and insulation panel in their correct positions Cube Guide A Cube Guide B Fig 6 31 Repeat steps 17 through 30 three more times to rinse thoroughly Note If you do not sanitize the icemaker go to step 12 in 2 Sanitizing Procedure 44 2 Sanitizing Procedure Following Cleaning Procedure 1 Dilute a 5 25 sodium hypochlorite solution chlorine bleach with warm water add 1 25 fl oz 37 ml to 2 5 gal 9 5 of water 2 Remove the insulation panel 3 Pour the sanitizing solution into the water tank
10. the exterior occasionally with a clean soft cloth Use a damp cloth containing a neutral cleaner to wipe off oil or dirt buildup 2 Dispenser Unit Storage Bin and Scoop Wash your hands before removing ice Use the plastic scoop provided bin accessory The dispenser unit storage bin is for ice use only Do not store anything else in the dispenser unit storage bin Clean the scoop and the dispensing unit storage bin liner using a neutral cleaner Rinse thoroughly after cleaning 4 Condenser 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 location C Preparing the Icemaker for Long Storage CAUTION 1 When storing the icemaker for an extended time or in sub freezing temperatures follow the instructions below to prevent damage 2 To prevent damage to the water pump seal do not operate the icemaker with the control switch in the WASH position when the water tank is empty 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 Remove the water from the icemaker water supply line 1 Turn off the power supply and remove the front panel 2 Close the icemaker water supply line shut off valve and open the icemaker water supply line drain valve 3 Allow the line to drain by gravity 4 A
11. then move the control switch to the OFF position 3 Remove the insulation panel Remove cube guide B then remove cube guide A See Fig 4 Remove the overflow cap overflow pipe and water shield 4 Remove the drain plug Allow the water tank to drain then replace the drain plug in its correct position Be careful not to cross thread it 5 Replace the water shield overflow pipe overflow cap cube guide A cube guide B and insulation panel in their correct positions Be careful not to cross thread the overflow pipe 6 Disconnect the vent tube and the flush tube from the top of the float switch then remove the float switch assembly from the mounting bracket and remove the rubber boot from the bottom of the float switch assembly See Fig 5 7 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 8 Wipe down the float switch assembly s housing shaft float and retainer rod with a mixture of 1 part Hoshizaki Scale Away and 25 parts warm water Clean the inside of the rubber boot and hose with cleaning solution Rinse the parts thoroughly with clean water Vent 9 Reassemble the float switch assembly and replace it and the rubber boot in their Flush correct positions Reconnect the vent tube and the flush tube 10 Move the control switch to the ICE Shaft position 11 Replace the
12. timer to a longer setting decreases 24 hour production The pump out timer S4 dip switch 3 amp 4 acts in place of the harvest timer during cycles with a pump out For details see Il C 3 c Pump Out Timer S4 dip switch amp 4 S4 Dip Switch Setting Time seconds Pump Out Timer 4 dip switch 3 amp 4 CAUTION Factory set Do not adjust S4 dip switch 3 amp 4 must remain in the factory default position of 3 off and 4 on Otherwise the drain valve will not energize during pump out At the end of a freeze cycle when a pump out is called for the pump motor stops for 2 seconds then the drain valve relay energizes energizing the pump motor and drain valve Water is removed from the bottom of the tank and sent down the drain At the same time water flows through the small float switch tube to power flush the float switch The pump out drains the water tank for the time determined by the pump out timer The pump out timer also acts in place of the harvest timer during cycles with a pump out The pump out timer is factory set do not adjust Note The drain valve shares power with the inlet water valve during the pump out cycle Therefore S4 dip switch 3 amp 4 must be set to 3 off and 4 on See III B Wiring Diagram S4 Dip Switch Setting Time seconds 1 Water OFF 150 180 OFF 120 open 180 T1 Time to the water tank T2 Harvest timer at pump out d Pump Out Frequency Cont
13. 3 Controls and FACS UMS isc s E utum ud 17 a Default Dip edicti aM on Od 17 b Harvest Timer S4 dip switch 1 amp 2 17 c Pump Out Timer S4 dip switch 3 amp ob TR REV ERE RD qud 18 d Pump Out Frequency Control 54 dip switch 5 amp 6 18 e Harvest Pump Timer 54 dip switch 7 toco coeno nen snap ah ran tan pannis 19 f Factory Use S4 dip switch B 19 g Freeze Timer 54 dip switch 9 amp 10 19 h Float Switch Control S5 dip switch adnata nnper 20 i Refill Counter 55 dip switch 2 through 5 eria 20 D Gontrol le NETTE 20 lll Technical IMtormatioN Me OO TEE 21 Water Circuit and Refrigeration 21 B Wiring TAA EOS 22 C Performance 23 INV Service me re mg mm 24 A Diagnostic PROC T 24 B C ntrol Board Met 27 C Bin Control Cleaning 28 TL 28 2 Bin srasni 30 D Float Switch Check and Cleaning
14. For details see II C 3 e Harvest Pump Timer S4 dip switch 7 CAUTION S4 dip switch 7 must remain in the factory default position of 7 on Otherwise PM will not energize during the last 50 seconds of harvest The pump out timer S4 dip switch 3 amp 4 acts in place of the harvest timer during cycles with a pump out For details see II C 3 c Pump Out Timer S4 dip switch 3 amp 4 The minimum total time allowed by CB for a complete harvest cycle is 2 minutes At the end of harvest CB checks the position of F S and proceeds to the freeze cycle if it is closed or calls for a 1 minute fill cycle if it is open c Freeze Cycle LED 1 is on Comp FMRs and PM continue LLVs energize HGVs de energize For the first 5 minutes CB will not terminate the freeze cycle At the end of 5 minutes F S assumes control of the freeze cycle As ice builds on the evaporator the water level in the tank lowers The freeze cycle continues until F S opens There is a 15 second delay before CB acknowledges an open F S CB then terminates the freeze cycle 11 Pump Out Cycle LEDs 1 4 3 and 2 on Comp and FMRs remain energized HGVs and WV energize LLVs de energize PM stops for 2 seconds then DVR energizes energizing PM and DV for 10 seconds Water is removed from the bottom of the tank and sent down the drain At the same time water flows through the small F S tube to power flush F S When the pump out timer terminates pump out is complet
15. Hoshizaki America Inc Modular Crescent Cuber Serenity Series Model KMS 822MLH Including Condensing Unit Model SRK 10H SERVICE MANUAL A Superior Degree of Reliability www hoshizaki com l u evercheck 8 Number 73182 Issued 2 18 201 I Only qualified service technicians should install service and maintain the icemaker No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual Failure to service and maintain the equipment in accordance with this manual may adversely affect safety performance component life and warranty coverage 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 write or send an e mail message 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 Support 770 487 2331 Fax 1 800 843 1056 770 487 3360 E mail techsupport hoshizaki com Web Site www hoshizaki com NOTE To expedite assistance all correspondence communication MUST include the following information Model Number Serial Number Complete and detai
16. If 115VAC is present and DVR is not energized check DVR solenoid for open windings If DVR is energized and PM is not energized check PM circuit including DVR contacts PM and PM capacitor If water is not going down the drain check that DV is energized and open If not check that CB LEDs 4 and 3 are on and WV circuit energizes DV during pump out Check for 115VAC at DV solenoid and make sure DV is clear of debris If water does not pump out check and clean DV and tubing 7 Normal Harvest Cycle same as the initial harvest cycle Return to IV A 4 Initial Harvest Cycle 8 Shutdown Bin Control See IV C 1 Bin Control Check Legend BC bin control CB control board Comp compressor DV drain valve DVR arain valve relay FMRs fan motors remote F S float switch HGVs hot gas valves KMS and SRK HM headmaster C P R LLVs liquid line valves KMS and SRK PM pump motor TXV thermostatic expansion valve WV inlet water valve 26 Control Board Check Before replacing CB that does not show a visible defect and that you suspect is bad always conduct the following check procedure This procedure will help you verify your diagnosis Alarm Reset If CB is in alarm beeping press the ALARM RESET button on CB while CB is beeping WARNING Risk of electric shock Care should be taken not to touch live terminals Once reset the unit starts at the 1 minute fill cycle For audible alarm information see II C 2 LED Lig
17. N PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 16 200 BTU h 90 F 32 WT 70 F 21 TOTAL HEAT OF REJECTION FROM COMPRESSOR 1 900 BTU h AT 90 F 32 C WT 70 F 21 CONDENSER VOLUME gt 226CUJIN SRK H Note 1 Pressure data is recorded at 5 minutes into freezing cycle The data not in bold should be used for reference only 2 We reserve the right to make changes in specifications and design without prior notice 23 IV Service Diagnosis A WARNING 1 This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire 2 Risk of electric shock Use extreme caution and exercise safe electrical practices Moving parts e g fan blade can crush and cut Keep hands clear CHOKING HAZARD Ensure all components fasteners thumbscrews are securely in place after the unit is serviced Make sure that none have fallen into the storage bin Make sure all food zones in the icemaker and dispenser unit storage bin are clean after the unit is serviced For cleaning procedures see Cleaning and Maintenance A Diagnostic Procedure The diagnostic procedure is basically a sequence check which can be used at unit startup or for system diagnosis This procedure allows you to diagnose electrical system and component failures Before conducting the diagnostic proced
18. Refill Counter S5 dip switch 2 through 5 CAUTION Factory set Do not adjust Otherwise the unit will not operate correctly S5 dip switch 2 through 5 allows for refills during the freeze cycle The KMS 822MLH does not refill D Control Switch The control switch has three positions OFF for power off ICE for icemaking and WASH to activate the water pump when cleaning and sanitizing 20 Ill Technical Information ircul tion C igera it and Refr Water Jossaidwog eur Y abeyosig ye SOWJOYL oBjeuosiq eur uonon seo YOUMS einsseJq uBiH YOBUD d O JejseuupeeH 1 sue4 01 5 ane uoisuedx3 SeA EA 49949 YOUMS 12015 seg Jojsiuueu 5 ur uonong eur pinbr e 6 QgweAeurpmbr eur UreJq JELENA 19lU Ajddnsg 1 11628 5 eqn 21 822MLH with SRK 10H B Wiring Diagram 1 KMS Te 42 0 9 0 911 4 644 662 uring 2 8 2 0 1 4 6 4 992 no no jejsouuou xx indino
19. TROL COOLING WATER CONTROL BIN CONTROL SYSTEM COMPRESSOR CONDENSING UNIT EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE CONTROL BOARD CIRCUIT PROTECTION REFRIGERATION CIRCUIT PROTECTION LOW WATER PROTECTION ACCESSORIES SUPPLIED REQUIRED OPERATING CONDITIONS 115VAC Supplied by SRK 10H via Factory Supplied Wire Harness Ambient Temp F 50 70 90 70 80 824 374 795 361 730 331 90 820 372 774 351 714 324 100 801 364 760 345 659 299 Crescent Cube 13 6 Ib 6 2 kg 624 pcs 90 70 F 70 50 F 1800 5 58 1710 4 89 149 19 3 363 43 3 22 x24 5 8 x28 559x625x713 mm Stainless Steel Galvanized Steel rear Net 122 Ib 55 kg Shipping 152 Ib 69 kg Wire Harness Connection from SRK to KMS Inlet 1 2 FPT Outlet 3 4 FPT 5 8 OD Tube Liquid Line 1 2 Copper Tube Field Connection Suction Line 5 8 Copper Tube Field Connection Float Switch Hot Gas and Water Thermistor and Timer Timer Controlled Overflow Pipe Float Switch N A Mechanical Bin Control In SRK Air Cooled Remote Condensing Unit SRK 10H Vertical type Stainless Steel and Copper Thermostatic Expansion Valve Headmaster C P R in SRK 10H 160 PSI 404A 14 Ib 15 9 oz 6800 g Icemaker 0 Ib 7 1 oz 200 g Cond Unit 14 Ib 8 8 oz 6600 g High 467 PSIG Low 230 PSIG High Voltage Cut out Internal Auto Reset High Pressure Switch in SRK 10H Float Switch Mechanical Bin Cont
20. bed above CB is bad and should be replaced 4 To verify voltage output from CB to the components slide the CB K1 ten pin connector out far enough to allow multimeter lead contact With the unit in the cycle to be tested check output voltage from the corresponding pin on CB K1 ten pin connector to ground If output voltage is not found and the appropriate LED is on CB is bad and should be replaced Legend CB control board CT control transformer 27 Control Check and Cleaning This unit uses a BC with a lever actuated proximity switch to control the ice level in the storage bin No adjustment is required BC is connected to CB red K4 connector When calling for ice BC proximity switch is closed green BC CLOSED LED on When BC actuator paddle is engaged BC proximity switch opens yellow BC OPEN LED on and CB shuts down the unit according to the chart below Cycle at Mechanical Bin Control Activation Fill Cycle 15 seconds after activation Harvest Cycle At the end of the harvest cycle or up to 15 seconds into the freeze cycle if activated at the end of the harvest cycle Freeze Cycle 15 seconds after activation if activated at least 15 seconds before the 5 minute short cycle protection timer terminates Otherwise at the end of the next harvest cycle 1 Bin Control Check To check BC follow the steps below 1 Turn off the power supply and clear any ice away from BC 2 Remove the front panel top pa
21. e CAUTION S4 dip switch 3 amp 4 must remain in the factory default position of 3 off and 4 on Otherwise DV will not energize during pump out The first pump out occurs after the 11th freeze cycle then every 10th cycle thereafter The pump out frequency control is factory set and generally no adjustment is required However where water quality is bad and the icemaker needs a pump out more often the pump out frequency can be adjusted The pump out frequency control S4 dip switch 5 amp 6 can be set to have a pump out occur every cycle or every 2 5 or 10 cycles Timing of the first pump out is dependent on S4 dip switch 5 amp 6 settings See the table below S4 Dip Switch Setting Pump Out Frequency Every cycle After 2nd freeze cycle Every 5 cycles After 6th freeze cycle Every 10 cycles After 11th freeze cycle FF Every cle N N e Harvest Cycle Same as the initial harvest cycle See II B 1 b Initial Harvest Cycle Note Unit continues to cycle until BC is satisfied or power is turned off The unit always restarts at the 1 minute fill cycle f Shutdown When BC is activated BC open the yellow BC OPEN LED comes on The unit then shuts down as outlined in the table below For further details see IV C Bin Control Check and Cleaning Cycle at Bin Control Activation Fill Cycle 15 seconds after activation Harvest Cycle At the end of the harvest cycle or up to 15 seconds into th
22. e See the nameplate on the SRK for the required refrigerant charge Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 latest edition be used 6 A liquid charge is required when charging an R 404A system to prevent fractionation Place the service cylinder on the scales if the service cylinder is not equipped with a dip tube invert the service cylinder then place it on the scales Open the high side valve on the gauge manifold 7 Allow the system to charge with liquid until the proper charge weight is met 8 If necessary add any remaining charge to the system through the low side CAUTION To prevent compressor damage use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low side service valve with the unit running 9 Close the high and low side service valves Close the high and low side gauge manifold valves then disconnect the gauge manifold hoses 10 Cap the service valves to prevent a possible leak 40 B Important Notes for Component Replacement CAUTION When replacing a component listed below see the notes to help ensure proper operation Compne Compressor Install a new start capacitor run capacitor and start relay Expansion Valve Attach the expansion valve bulb to the suction line in the same location as the previous bulb The bulb should be between the 10 and 2 o clock positions on the t
23. e freeze cycle if activated at the end of the harvest cycle Freeze Cycle 15 seconds after activation if activated at least 15 seconds before the 5 minute short cycle protection timer terminates Otherwise at the end of the next harvest cycle Legend BC bin control CB control board Comp compressor DV drain valve DVR drain valve relay X10 motors remote F S float switch HGVs hot gas valves KMS and SRK LLVs liquid line valves KMS and SRK PM pump motor WV inlet water valve 12 Uonisod 39 ul peoeld UBYM 11816 00 IM yun eu pue Buiueejo Jaye ay 95015 9JoN A quuesse y episul y pue y ujoq Jezniues pue eui Uado Buiueej Ajquuesse ere d Joyesodend eui 910UJ8J SJ0 OUJ UeJ SHIA 19 UI AM UIeJp HAG JO episino y Je o Jeziiiues pue eui yM ojowu eu MHS pue SI y eui piNbI SATI JoSsejduioo duio3 uonisod HSVM 94 ueuM Burzniues pue pesn YAMS uo uonisod HSVM OUL MHS pue seb 10U SADH
24. e panel in their correct positions 10 Move the control switch to the ICE position Replace the insulation panel and the front panel in their correct positions then turn on the power supply After 1 minute the 1 minute fill cycle should end and the initial harvest cycle should begin If the initial harvest cycle begins F S is good and the check is complete If the initial harvest cycle does not begin continue to step 11 11 12 13 14 Turn the power supply Remove the front panel then move the control switch to the OFF position Remove the right side panel then remove the control box cover Disconnect the black F S connector from CB BLACK K5 connector 31 15 Check for continuity across F S leads With the water tank full F S should be closed If F S is closed and the icemaker will not switch from the 1 minute fill cycle to the initial harvest cycle replace CB If open confirm that the water tank is full If the tank is not full check the water supply water filters and inlet water valve If the tank is full follow the steps in IV D 2 Float Switch Cleaning After cleaning the float switch check it again Replace if necessary 2 Float Switch Cleaning Depending on local water conditions scale may build up on the float switch Scale on the switch can cause the float to stick In this case the float switch should be cleaned 1 Turn off the power supply 2 Remove the front panel
25. e short cycle protection timer terminates CB turns freeze termination over to F S Diagnosis Check that Comp FMRs and PM continue Confirm that evaporator temperature drops If not confirm that LLVs have energized and are open Make sure WV and HGVs are de energized and closed Next confirm proper unit pressures and TXV operation check for an inoperative HM or an inefficient Comp After 5 minutes in freeze disconnect black F S connector from CB BLACK K5 connector After a 15 second delay the unit should switch out of the freeze cycle If the unit switches out of freeze with F S connector removed but would previously not switch out of freeze with F S connected long freeze 3 beep alarm F S may be sticking To check and clean F S see IV D Float Switch Check and Cleaning If the unit remains in freeze longer than 15 seconds after disconnecting black F S connector replace CB For short freeze cycle check that reservoir is full at beginning of freeze DV is de energized and closed and drain plug and stand pipe are in and not leaking Note Normal freeze cycle will last 20 to 40 minutes depending on model and conditions Cycle times and pressures should follow performance data provided in this manual See III C Performance Data 25 6 Pump Out Cycle 10 second pump out LEDs 1 4 3 and 2 LED 4 WV circuit is when 54 dip switch 3 amp 4 set to factory default positions of 3 off and 4 on With S4 dip
26. erating Defective Screen or orifice clogged b Coil winding open Open in freeze cycle 13 Inlet Water Valve 34 No Ice Production Possible Cause 14 Float Switch Float does not move freely a See IV D Float Switch Check b Defective and Cleaning 15 Compressor a Magnetic contactor contacts bad or coil winding open b Start capacitor or run capacitor defective c Internal overload protector open 16 Hot Gas Valves KMS amp SRK 17 Thermistor a Loose disconnected or defective See IV E Thermistor Check d Start relay contacts bad or coil winding open 19 Expansion Valve TXV 20 Liquid Line Valves KMS 8 SRK 21 Condensing Unit Fan Motor Defective capacitor 18 Pump Motor a Motor winding open b Bearing worn out or locked rotor Defective coil 24 Drain Valve Dirty leaking by Defective coil Water leaks causing short freeze time 25 Water System 2 Freeze Up Defrost and clean the unit prior to diagnosing freeze up See VI A Cleaning and Sanitizing Instructions Fill out a Hoshizaki freeze up checklist 1 Evaporator 3 Spray Tubes and or Spray g Guides b Out of position EN T b External water filters clogged C Insufficient water line size Minimum 1 4 nominal ID 5 Inlet Water Valve 8 Screen or orifice clogged Freeze Possible Cause 6 Float Switch a Dirty sticking See IV D Float Switch C
27. float Be careful not to bend the retainer rod excessively when removing it c Wipe down the float switch housing shaft float and retainer rod with cleaning solution Clean the inside of the rubber boot and hose with cleaning solution Rinse the parts thoroughly with clean water d Reassemble the float switch assembly and replace it and the rubber boot in their correct positions Reconnect the vent tube and the flush tube 43 8 Pour the cleaning solution into the water tank 9 Fully open the cleaning valve on the left side wall of the machine compartment 10 Move the control switch to the WASH position Replace the insulation panel and the front panel in their correct positions 11 12 13 14 Turn the power supply to start the washing process Turn off the power supply after 30 minutes Remove the front panel Remove the insulation panel Remove cube guide then remove cube guide Remove the overflow cap overflow pipe and water shield 15 Remove the drain plug Allow the water tank to drain then replace the drain plug in its correct position 16 Replace the water shield overflow pipe overflow cap cube guide A cube guide B and insulation panel in their correct positions 17 Move the control switch to the ICE position 18 Close the cleaning valve Note The icemaker will not operate unless the cleaning valve is completely closed 19 Replace the front panel in its correct
28. front panel in its correct position 12 Turn on the power supply to start the fa Float automatic icemaking process l Retainer Rod Legend CB control board F S float switch Rubber Boot and Hose Fig 5 32 E Thermistor Check To check thermistor resistance follow the steps below 1 Turn off the power supply 2 Remove the front panel then move the control switch to the OFF position 3 Remove the right side panel then remove the control box cover 4 Remove the thermistor 5 Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes 6 Disconnect the white thermistor connector from CB WHITE K3 connector and check the resistance between thermistor leads Normal reading is within 4 7 to 6 2 kQ If outside the normal reading replace the thermistor See V B Important Notes for Component Replacement If inside the normal reading continue to the next step 7 Replace the thermistor in its correct position See V B Important Notes for Component Replacement 8 Reconnect the white thermistor connector to CB WHITE connector 9 Replace the control box cover in its correct position then turn on the power supply 10 Move the control switch to the ICE position 11 Once the harvest cycle starts begin timing the harvest cycle 12 The harvest timer and harvest cycle should terminate within 2 to 5 minutes If the harvest cycle does not terminate within 2 to 5 m
29. heck b Defective and Cleaning 7 Refrigerant Charge 8 Control Board a Harvest timer S4 dip switch 1 amp 2 set too short See 1 2 Controls and b Harvest pump timer S4 dip switch 3 amp 4 not in factory default Adjustments and IV B Control position Board Check c Defective 9 Bin Control a Actuator does not move freely See IV C Bin Control Check and Cleaning 10 Thermistor a Loose disconnected or defective See IV E Thermistor Check 11 Expansion Valve TXV _ 12 Hot Gas Valves KMS amp SRK a Closed 13 Liquid Line Valves KMS amp SRK 14 Drain Valve Relay Bad contacts Open coil Not allowing pump motor operation during last 50 seconds of harvest Freeze Cycle 1 Evaporator 8 Scaled up b Damaged 2 Spray Tubes and or Spray a Dirty Guides b Out of position 3 Refrigerant charge 4 Control Board 8 Freeze timer set incorrectly See IV B Control Board Check p Defective 5 Inlet Water Valve 8 Leaking by 6 Float Switch Float does not move freely See IV D Float Switch Check Defective and Cleaning 7 Pump Motor a RPM too slow 8 Expansion Valve TXV a Bulb loose or Defective 9 Headmaster C P R Defective 36 3 Low Ice Production 1 Evaporator 2 Spray Tubes and or Spray Guides Refrigerant Charge 4 Water Supply c Insufficient water line size Minimum 1 4 nominal ID d Too cold 5 Control Board a T
30. hermistor connection loose See IV B Control Board Check b Defective 6 Thermistor a Loose disconnected or defective See IV E Thermistor Check 7 Hot Gas Valves KMS amp SRK 8 Inlet Water Valve 9 Compressor Inefficient or off 10 Liquid Line Valves KMS amp SRK 11 Expansion Valve TXV 8 Defective Defective Raw 12 Headmaster C P R Long Freeze Cycle 1 Evaporator Scaled up dirty 2 Float Switch Scaled up dirty See IV D Float Switch Check Float sticking 2 end Cleaning Defective switch 6 Control Board See IV B Control Board Check Defective 7 Refrigerant Charge Low 8 Expansion Valve TXV Bulb loose Defective i Inefficient or off 10 Pump Motor RPM too slow 11 Liquid Line Valves KMS amp SRK a Erratic or closed 12 Headmaster C P R Not bypassing 37 V Replacement of Components WARNING 1 This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire 2 Move the control switch to the OFF position and turn off the power supply before servicing Lockout Tagout to prevent the power from being turned back on inadvertently CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after the unit is serviced Make sure that none have fallen into the storage bin Make sure all fo
31. hts and Audible Alarm Safeties 1 Check the dip switch settings to assure that S4 dip switch 3 4 7 8 9 10 and S5 dip switch 1 through 5 are in the factory default position S4 dip switch 1 2 5 6 are cleaning adjustments and the settings are flexible For factory default settings see Default Dip Switch Settings 2 Move the control switch to the ICE position If the red POWER OK LED is on control voltage is good continue to step 3 If the red POWER OK LED is off check CT secondary circuit CT output is 10 5VAC at 115VAC primary input If the secondary circuit has proper voltage and the red LED is off CB is bad and should be replaced If the secondary circuit does not have proper voltage check CT primary circuit Check for 115VAC at ten pin connector 10 pin BR wire to a white neutral wire for 115VAC Always choose a white neutral wire to establish a good neutral connection when checking voltages For additional checks see IV F 1 No Ice Production 3 The OUTPUT TEST button provides a relay sequence test Make sure the control switch is in the ICE position then press the OUTPUT TEST button The correct lighting sequence is 1 4 3 2 Note that the order of the LEDs from the outer edge of the control board is 1 4 3 2 Components e g compressor will cycle during the test Following the test the icemaker begins operation at the 1 minute fill cycle If the LEDs do not light as descri
32. inutes the harvest timer is bad and CB should be replaced Legend CB control board 33 Diagnostic Charts Before consulting the diagnostic charts check for correct installation proper voltage per unit nameplate and adequate water supply Check CB using the steps in IV B Control Board Check Check the dip switch settings to assure that S4 dip switch 3 4 7 8 9 10 and S5 dip switch 1 through 5 are in the factory default position S4 dip switch 1 2 5 6 are cleaning adjustments and the settings are flexible For factory default settings see II C 3 a Default Dip Switch Settings 1 No Ice Production No Ice Production Possible Cause 1 Power Supply a Off blown fuse or tripped breaker b Not within specifications 2 Water Supply a Water supply off or improper water pressure b External water filters clogged 3 Fuse SRK Control Box 4 High Pressure Switch SRK 8 Dirty condenser 5 Thermostat SRK e Dirty condenser b Compressor or compressor components faulty 6 Wire Harness a Disconnected or loose connection 7 Fuse KMS Switch Bow 8 Control Switch a In WASH or OFF position b Bad contacts a 9 Control Transformer a Coil winding open or shorted 115V 10 5V 10 Interlock Switch Cleaning Valve Ti Contro Board See Control Board Check 12 Bin Control See IV C Bin Control Check andl p Actuator does not move freely Cleaning Condensing unit fan not op
33. itch to the OFF position 3 Remove the control box cover 4 Disconnect the red BC connector from CB RED K4 connector 5 Follow the instructions below to remove BC a Loosen the screws securing the control box then lift the control box off and hang it from the base See Fig 1 b Remove the insulation Remove the thumbscrews securing the bin control assembly Remove the bin control assembly 6 Remove BC from the extension bracket See Fig 3 7 Wipe down BC assembly with a mixture of 1 part Hoshizaki Scale Away and 25 parts warm water Rinse the parts thoroughly with clean water Insulation 8 Reassemble BC assembly and replace it in its correct position Note If the magnet was removed for cleaning be sure to replace it in its correct position Bin Control Cover 9 Replace the control box in its correct position and secure then reconnect the red BC connector to CB RED K4 connector Bin Control Replace the control box cover Extension Bracket 10 11 12 13 gt Move the control switch to the ICE position Replace the panels in their correct positions Actuator Paddle Bin Control Cabl Turn on the power supply to start the automatic icemaking process Legend BC bin control Bin Control Fig 3 30 Float Switch Check and Cleaning F S is used to determine that there is sufficient water in the tank after the 1 minute fill cycle and after each ha
34. led explanation of the problem This manual should be read carefully before the icemaker is serviced maintenance operations are performed Only qualified service technicians should install service and maintain the icemaker Read the warnings contained in this booklet carefully as they give important information regarding safety Please retain this booklet for any further reference that may be necessary CONTENTS Important Safety Information 5 erenn E E E R 7 marrre a a E 7 B Condensing EE EE Ea 8 ll General AON sesser EER E 9 E E 9 9 2 SING 10 Sequence 11 1 Sequence Cycles and Shutdown 11 ee 11 Harvest 11 C Freeze Cycle M 11 d P mp Q ut Cycle sud odio ur E E 12 e Harvest Cycle 12 m 12 2 Sequence Flow L 13 C Control BOSE E E E andre AN 14 Board 15 2 LED Lights and Audible Alarm Safeties 2 16
35. lve the valve handle should be parallel to the valve body CLOSED Normal Icemaking Operation Cleaning and Sanitizing Operation allows solution flow to the inside of the evaporator 1 Cleaning Procedure 1 Dilute 35 fl oz 400 ml of Hoshizaki Scale Away with 2 5 gal 9 5 of warm water 2 Remove all ice from the evaporator and the dispenser unit storage bin Note To remove cubes on the evaporator turn off the power supply and turn it back on after 3 minutes The harvest cycle starts and the cubes will be removed from the evaporator 3 Turn off the power supply 4 Remove the front panel Remove the insulation panel Remove cube guide B then remove cube guide A See Fig 6 Remove the overflow cap overflow pipe and water shield 5 Remove the drain plug Allow the water tank to drain then replace the drain plug in its correct position Be careful not to cross thread it 6 Replace the water shield overflow pipe overflow cap cube guide A and cube guide B in their correct positions Be careful not to cross thread the overflow pipe 7 In bad or severe water conditions clean the float switch as described below Otherwise continue to step 8 a Disconnect the vent tube and the flush tube from the top of the float switch housing then remove the float switch assembly Remove the rubber boot from the bottom of the assembly b Remove the retainer rod from the bottom of the float switch housing then remove the
36. maker is provided with refrigerant service valves Using proper refrigerant practices recover the refrigerant from the service valves and store it in an approved container Do not discharge the refrigerant into the atmosphere 38 2 Brazing A WARNING 1 R 4044 itself is not flammable at atmospheric pressure and temperatures up to 176 F 80 C 2 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 Do not use silver alloy or copper alloy containing arsenic 4 Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG DO NOT use R 404A as a mixture with pressurized air for leak testing 1 Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG Note Because the pipes in the evaporator case are specially coated to resist corrosion it is important to make connections outside the evaporator case when possible If it is necessary to braze inside the evaporator case use sandpaper to remove the coating from the brazing connections before unbrazing the components CAUTION 1 Always install a new drier every time the sealed refrigeration system is opened 2 Do not replace the drier until after all o
37. n power is supplied CB red POWER OK LED and green BC CLOSED LED come on If yellow BC OPEN LED is on the unit will not start In this case clear ice away from the BC actuator paddle in the dispenser unit storage bin area A 5 second delay occurs at startup Note that the order of the green sequence LEDs from the outer edge of CB is 1 4 3 2 a 1 Minute Fill Cycle LED 4 is on WV energizes and the 1 minute fill cycle begins After 1 minute CB checks for a closed F S If F S is closed the harvest cycle begins If not WV remains energized through additional 1 minute fill cycles until water fills the tank and closes F S This serves as a low water safety to protect PM b Initial Harvest Cycle LEDs 1 4 and 2 are on WV remains energized Comp FMRs and HGVs energize CB monitors the warming of the evaporator via the thermistor located on the suction line When the thermistor reaches 48 F 9 C CB reads a 3 9 signal from the thermistor and turns harvest termination over to the adjustable harvest timer which is factory set for normal conditions For details see Il C 3 b Harvest Timer S4 dip switch 1 amp 2 WV is energized during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds Harvest Pump Timer S4 dip switch 7 whichever is shorter 50 seconds before the harvest timer terminates LED 4 and WV de energize LED 3 comes on DVR energizes energizing PM for the last 50 seconds of harvest
38. nel and right side panel then move the control switch to the OFF position 3 Remove the control box cover 4 Disconnect the red BC connector from CB RED K4 connector 5 If BC is accessible from the dispenser unit storage bin continue to step 7 If BC is not accessible from the dispenser unit storage bin follow the instructions below to remove BC a Loosen the screws securing the control box then lift the control box off and hang it from the base See Fig 1 b Remove the insulation Remove the thumbscrews securing the bin control assembly then remove the bin control assembly 6 Check for continuity across the wires of the red connector When the actuator paddle is not engaged BC switch is closed If open check that BC cable connector is properly connected and that the actuator paddle is not sticking Clean if necessary See IV C 2 Bin Control Cleaning If BC switch still reads open replace BC 7 Press the actuator paddle check for continuity across the wires of the red connector When the actuator paddle is engaged BC switch is open If closed check that the actuator paddle is not restricted Clean if necessary See IV C 2 Bin Control Cleaning If BC switch still reads closed replace BC 8 If the control box was removed replace it in its correct positon 9 Reconnect the red connector to CB RED K4 connector then move the control switch to the ICE position 10 Turn on the power supply 11 Check that
39. o service this icemaker 2 CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after any cleaning or maintenance is done to the unit Make sure that none have fallen into the dispenser unit storage bin 3 The dispenser unit storage bin is for ice use only Do not store anything else in the dispenser unit storage bin A Cleaning and Sanitizing Instructions Hoshizaki recommends cleaning and sanitizing this unit at least once a year More frequent cleaning and sanitizing however may be required in some existing water conditions WARNING 1 To prevent injury to individuals and damage to the icemaker do not use ammonia type cleaners 2 Carefully follow any instructions provided with the bottles of cleaning and sanitizing solution 3 Always wear liquid proof gloves and goggles to prevent the cleaning and sanitizing solutions from coming into contact with skin or eyes 4 To prevent damage to the water pump seal do not operate the icemaker with the control switch in the WASH position when the water tank is empty 42 1 The cleaning valve is opened during cleaning and sanitizing to allow solution flow to the inside of the evaporator It should be closed for all icemaking operation The compressor will not operate unless this valve is completely closed 2 To close the cleaning valve the valve handle should be at a right angle to the valve body To open the cleaning va
40. od zones in the icemaker and storage bin are clean after the unit is serviced For cleaning procedures see VI Cleaning and Maintenance A Service for Refrigerant Lines A WARNING 1 Repairs requiring the refrigeration circuit to be opened must be performed by properly trained and EPA certified service personnel 2 Always recover the refrigerant and store it in an approved container Do not discharge the refrigerant into the atmosphere Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG DO NOT use R 404A as a mixture with pressurized air for leak testing CAUTION Do not leave the system open for longer than 15 minutes when replacing or servicing parts 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 replace the drier until after all other repair or replacement has been made Install the new drier with the arrow on the drier in the direction of the refrigerant flow When brazing protect the drier by using a wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 F 121 C 1 Refrigerant Recovery The ice
41. onds of harvest because it shares power with the inlet water valve which de energizes the last 50 seconds of harvest See Wiring Diagram 4 Dip Switch Setting Pump Motor Time seconds 50 f Factory Use S4 dip switch 8 Factory set for proper operation Do not adjust This must be left in the factory default position g Freeze Timer S4 dip switch 9 amp 10 CAUTION Adjust to proper specification or the unit may not operate correctly The freeze timer setting determines the maximum allowed freeze time to prevent possible freeze up issues Upon termination of the freeze timer the control board initiates the harvest cycle After 2 consecutive freeze timer terminations the control board shuts down the icemaker In this case see IV F 3 Low Ice Production for possible solutions The freeze timer is factory set and generally no adjustment is required Before changing this setting contact your local Hoshizaki distributor or Hoshizaki Technical Support for recommendations 4 Dip Switch Setting Time 10 minutes OFF No 9 10 9 ow ov 9 19 h Float Switch Control 5 dip switch 1 CAUTION Factory set Do not adjust Otherwise the unit will not operate correctly 55 dip switch 1 allows for single or double float switch applications The KMS 822MLH uses a single float switch 5 Dip Switch Setting Single or Double Float Switch Application OFF i
42. relay FWRs fan motors remote F S float switch HGVs hot gas valves KMS SRK HM headmaster C P R LLVs liquid line valves KMS and SRK PM pump motor TXV thermostatic expansion WV inlet water valve 16 3 Controls and Adjustments CAUTION Dip switches are factory set Failure to maintain factory settings may adversely affect performance and warranty coverage For more information contact Hoshizaki Technical Support at 1 800 233 1940 a Default Dip Switch Settings The dip switches are factory set to the following positions 1 2 9 8 6 7 8 9 10 S5 SwitchNo 1 2 3 4 5 KMS 822MLH OFF Freeze Timer 9 amp 10 Factory Use 8 Harvest Pump Timer 7 Do not adjust Pump Out Frequency Control 5 amp 6 Pump Out Timer 3 amp 4 Do not adjust out of factory setting Harvest Timer 1 amp 2 b Harvest Timer S4 dip switch 1 amp 2 The harvest timer starts when the thermistor reads 48 F 9 at the evaporator outlet and the control board reads the thermistor s 3 9 kO signal The harvest timer is factory set and generally no adjustment is required However a setting longer than the factory setting may be advised in cases where harvest needs to be prolonged for extra cleaning Before changing this setting contact your local Hoshizaki distributor or Hoshizaki Technical Support for recommendations Keep in mind that setting the harvest
43. rements could result in death electric shock serious injury fire or severe damage to equipment THE ICEMAKER MUST BE GROUNDED Failure to properly ground the icemaker could result in death serious injury or severe damage to equipment For SRK Electrical connection must be hard wired and must meet national state and local electrical code requirements Failure to meet these code requirements could result in death electric shock serious injury fire or severe damage to equipment The remote condensing unit requires an independent power supply of proper capacity See the nameplate for electrical specifications Failure to use a properly sized breaker or fuse can result in a tripped breaker blown fuses or damage to existing wiring This could lead to heat generation or fire THE REMOTE CONDENSING UNIT MUST BE GROUNDED Failure to properly ground the remote condensing unit could result in death or serious injury Specifications Icemaker 1 KMS 822MLH AC SUPPLY VOLTAGE APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day Reference without marks SHAPE OF ICE ICE PRODUCTION PER CYCLE ELECTRIC amp WATER CONSUMPTION KMS SRK COMBINED ELECTRIC W KWH 100 Ibs WATER gal 24HR gal 100 Ibs EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY DRAIN CONDENSATION REFRIGERATION CUBE CONTROL SYSTEM HARVEST CONTROL SYSTEM ICE MAKING WATER CON
44. rgize WV is energized during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds Harvest Pump Timer S4 dip switch 7 whichever is shorter Average initial harvest cycle at factory setting is 2 to 3 minutes 1 5 minutes after initial harvest begins touch Comp discharge line Is it hot If not check that Comp is energized refrigerant pressures are in range HGVs are energized and open LLVs are de energized and closed If discharge line is hot place a thermometer on the suction line next to the thermistor Has it warmed to 48 F 9 or warmer Confirm thermistor status See IV E Thermistor Check If temperature has been reached check that WV de energizes LED 4 off and DVR energizes LED 3 on energizing PM to circulate water over evaporator for the last 50 seconds of harvest If not make sure CB S4 dip switch 7 is in the factory default position Check CB K1 connector Pin 5 DBu wire and DVR solenoid for 115VAC If 1 minute fill cycle starts after harvest see IV D Float Switch Check and Cleaning If the thermistor reading is in proper range and CB fails to terminate the harvest cycle and initiate the freeze cycle CB is bad and must be replaced 5 Freeze Cycle LED 1 is on Comp FMRs and PM remain energized LLVs energize HGVs de energize The unit is held in freeze by a 5 minute short cycle protection timer CB will not accept a signal from F S during the first 5 minutes of freeze After the 5 minut
45. rol S4 dip switch 5 amp 6 The pump out frequency control is factory adjusted to drain the water tank every 10 cycles and generally no adjustment is required However where water quality is bad and the icemaker needs a pump out more often the pump out frequency can be adjusted as shown in the table Timing of the first pump out is dependent on S4 dip switch 5 amp 6 settings See the table below 4 IN Setting Pump Out Frequency ates tee Every cycle After 2nd freeze cycle Every 2 cycles After 3rd freeze cycle Every 5 cycles After 6th freeze cycle Every 10 cycles After 11th freeze cycle 18 Harvest Pump Timer 54 dip switch 7 CAUTION Factory set for proper operation Do not adjust Adjustment outside of the factory default setting may result in damage to the icemaker Depending on the harvest pump timer setting the pump motor energizes and runs the last 0 or 50 seconds of harvest When the pump motor is on water circulates over the evaporator The water valve is open during harvest for a maximum of 6 minutes or the length of harvest minus 0 or 50 seconds determined by the harvest pump timer setting whichever is shorter When S4 dip switch 7 is in the on position the drain valve relay energizes through the control board K1 ten pin connector pin 5 DBu wire The drain valve relay then energizes the pump motor for the last 50 seconds of harvest Note The drain valve is not energized during the last 50 sec
46. rol Extension Bracket Dispenser Unit or Ice Storage Bin SRK 10H Remote Condensing Unit VOLTAGE RANGE 104 127VAC AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 WATER SUPPLY PRESSURE 10 113 PSIG Note We reserve the right to make changes in specifications and design without prior notice Condensing Unit 1 SRK 10H AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE EXTERIOR DIMENSIONS WxDxH DIMENSIONS INCLUDING LEGS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC REFRIGERATION COMPRESSOR CONDENSER COMPRESSOR PROTECTION FAN MOTOR PROTECTION REFRIGERATION CIRCUIT PROTECTION REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE OPERATING CONDITIONS ACCESSORIES SUPPLIED REQUIRED 208 230 60 1 3 wire with neutral for 115VAC 115VAC Supplied to KMS via Factory Wire Harness 11 5A 5 Min Freeze AT 104 F WT 80 F 20A 20A 50 17 28 1270 432 711 mm 52 3 8 19 1 2 43 1330 495 1092 Galvanized Steel Net 230 Ib 104 kg Shipping 273 Ib 124 kg Main Power Supply Permanent Connection SRK to KMS Wire Harness Connection Liquid Line 1 2 Copper Tube Field Connection Suction Line Hermetic Model CS10K6E PFV 279 Air Cooled Fin and Tube Type 5 8 Copper Tube Field Connection Auto Reset Overload Protector Internal Thermal Protection Auto Reset High Pressure Switch Discharge Line Thermostat Headmaster C P R 160 PSI 404A 14
47. rvest cycle F S is also used to determine that the appropriate volume of water has been converted into ice before switching out of the freeze inii No adjustment is required M 1 Float Switch Check To check F S follow the steps below 1 Turn off the power supply 2 Remove the front panel then move the control switch to the OFF position Overflow Cap 3 Remove the insulation panel Remove cube guide B then remove cube guide A See Overflow Pipe Fig 4 Remove the overflow cap overflow pipe and water shield 4 Remove the drain plug Allow the water tank to drain then replace the drain plug in its correct position Be careful not to cross thread it 5 Replace the water shield overflow pipe Cube Guide A Cube Guide B overflow cap cube guide A cube guide Fig 4 B and insulation panel in their correct positions Be careful not to cross thread the overflow pipe 6 Remove the right side panel then remove the control box cover 7 Disconnect the black float switch connector from the control board BLACK K5 connector 8 Check for continuity across F S leads With the water tank empty F S should be open If open continue to step 9 If closed follow the steps in IV D 2 Float Switch Cleaning After cleaning the float switch check it again Replace if necessary 9 Reconnect the black F S connector to CB BLACK K5 connector then replace the control box cover and right sid
48. switch 3 off amp 4 on CB energizes WV during pump out The WV circuit energizes DV through DVR during pump out cycles CAUTION Do not adjust 4 dip switch 3 amp 4 must remain in the factory default position of 3 off and 4 on Otherwise DV will not energize during pump out Comp and FMRs remain energized WV and HGVs energize LLVs de energize PM stops for 2 seconds then DVR and WV energize energizing PM and DV for 10 seconds When the pump out timer terminates pump out is complete The pump out frequency control is factory set for every 10th cycle and generally no adjustment is required However where water quality is bad and the icemaker needs a pump out more often the pump out frequency can be adjusted as shown in the table Timing of the first pump out is dependent on S4 dip switch 5 amp 6 settings See the table below S4 Dip Switch Setting Pump Out 5 Nes Frequency OFF Every cycle After 2nd freeze cycle Every 2 cycles After 3rd freeze cycle OFF Every 5 cycles After 6th freeze cycle Every 10 cycles After 11th freeze cycle Diagnosis Confirm CB S4 dip switch 3 amp 4 settings are in the factory default positions 3 off and 4 on Check that Comp continues Confirm WV and HGVs energize and LLVs de energize Next check that DVR PM and DV energize If DVR does not energize LED 3 on check CB 5 pin DBu wire on CB K1 ten pin connector for 115VAC If no voltage is present CB is bad and must be replaced
49. tate control board is employed in Hoshizaki Crescent Cubers All models are pretested and factory set CAUTION 1 The control board is fragile handle very carefully 2 The control board contains integrated circuits which are susceptible to failure due to static discharge It is especially important to touch the metal part of the unit before handling or replacing the control board Do not touch the electronic devices on the control board or the back of the control board Do not change wiring and connections Do not misconnect K3 K4 and K5 because the same connector is used for the thermistor bin control and float switch 5 Always replace the whole control board assembly if it goes bad 6 Do not short out power supply to test for voltage 14 1 Control Board Layout G Control Board ALARM RESET Button Bin Control Switch S4 Dip Switch OUTPUT TEST Button used to test relays on control board Closed LED green Bin Control Switch Open LED yellow BC CLOSED Part Number 000 Alarm Buzzer E ooo Power LED red S r lights when power is supplied to the control board gt e Relay LEDs energized as below 5 24379 4 indicate which relays are LED 2 X2 Relay Hot Gas Valves HGVs C ri 9 LED 3 X3 Relay Pump Motor PM on at harvest pump time and i LED 4 X4 Relay Inlet Water Valve WV
50. ten pin connector for 115VAC If no voltage is present CB is bad and must be replaced If voltage is present check WV connections and solenoid continuity If unit fails to start harvest check for open F S or bad 1 minute timer in CB See IV D Float Switch Check and Cleaning 4 Initial Harvest Cycle LEDs 1 4 and 2 are on WV remains energized Comp FMRs and HGVs energize CB monitors the warming of the evaporator via the thermistor located on the suction line When the thermistor reaches 48 F 9 C CB reads a 3 9 kO signal from the thermistor and turns harvest termination over to the harvest timer S4 dip switch 1 amp 2 The harvest timer has settings of 60 90 120 and 24 180 seconds WV is energized during harvest for maximum of 6 minutes or the length of harvest minus 50 seconds whichever is shorter 50 seconds before the harvest timer terminates LED 4 goes off WV de energizes LED 3 comes on and DVR energizes energizing PM for the last 50 seconds of harvest CAUTION S4 dip switch 7 must remain in the factory default position of 7 on Otherwise PM will not energize during the last 50 seconds of harvest The minimum total time allowed by CB for a complete harvest cycle is 2 minutes When the harvest timer terminates the harvest cycle is complete CB checks the position of F S and proceeds to the next cycle if it is closed or calls for a 1 minute fill cycle if it is open Diagnosis Check that Comp FMRs and HGVs ene
51. the green BC CLOSED LED on CB is on 28 12 Allow the unit to cycle on Press and hold the actuator paddle The yellow OPEN LED should be on and the unit should shut down according to the chart above If it does not CB is bad and should be replaced 13 Turn off the power supply 14 If BC was removed remove the control box and then replace BC and control box in their correct positions 15 Replace the control box cover 16 Replace the panels in their correct positions 17 Turn on the power supply to start the automatic icemaking process Legend BC bin control CB control board Thumbscrews Bin Control Asembly Control pe ks Box Fig 1 Bin Control Cable NEN ae Bin Control Extension Bracket 4l Actuator Paddle Bin Control Bin Control Proximity Proximity Switch Open Switch Closed bin full unit off or calling for ice shutting down Fig 2 29 2 Control Cleaning Scale may build up on BC Scale can cause the actuator paddle and magnet to stick In this case BC should be cleaned WARNING CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after the unit is serviced Make sure that none have fallen into the storage bin 1 Turn off the power supply and clear any ice away from BC 2 Remove the front panel top panel and right side panel then move the control sw
52. ther repair or replacement has been made Install the new drier with the arrow on the drier in the direction of the refrigerant flow 3 When brazing protect the drier by using a wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 F 121 C 2 Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG DO NOT use R 404A as a mixture with pressurized air for leak testing 3 Evacuation and Recharge R 404A 1 Attach a vacuum pump to the system Be sure to connect the charging hoses to both high and low side service 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 Open the gauge manifold valves then open the high and low side service valves Never allow the oil in the vacuum pump to flow backwards 3 Allow the vacuum pump to pull down to a 29 9 Hg vacuum Evacuating period depends on pump capacity 39 4 Close the low side valve and high side valve the gauge manifold 5 Disconnect the gauge manifold hose from the vacuum pump and attach it toa refrigerant service cylinder Remember to loosen the connection and purge the air from the hos
53. tion which could result in damage to the unit IMPORTANT Indicates important information about the use and care of the unit A WARNING This icemaker should be destined only to the use for which it has been expressly conceived Any other use should be considered improper and therefore dangerous The manufacturer cannot be held responsible for injury or damage resulting from improper incorrect and unreasonable use To reduce the risk of death electric shock serious injury or fire follow basic precautions including the following This unit should be disassembled or repaired only by qualified service personnel to reduce the risk of electric shock injury or fire Move the control switch to the OFF position and turn off the power supply to the SRK condensing unit before any servicing to the KMS or SRK is undertaken Place the KMS disconnect if applicable in the off position Lockout Tagout to prevent the power supply from being turned back on inadvertently Do not make any alterations to the unit Alterations could result in electric shock injury fire or damage to the unit For KMS Power supply and ground connection are supplied from the SRK remote condensing unit via the wire harness provided Do not connect the wire harness leads to an external power source Wire harness routing conduit and disconnect if required must meet national state and local electrical code requirements Failure to meet these code requi
54. ttach a compressed air or carbon dioxide supply to the icemaker water supply line drain valve 5 Make sure at least 3 minutes have elapsed since you turned off the power supply Make sure the control switch is in the ICE position Replace the front panel in its correct position and turn on the power supply 6 Blow the icemaker water supply line out using the compressed air or carbon dioxide supply 7 Close the icemaker water supply line drain valve 46 2 Drain the water tank 1 Turn off the power supply 2 Remove the front panel then move the control switch to the OFF position 3 Remove the insulation panel Remove cube guide B then remove cube guide A See Fig 6 Remove the overflow cap overflow pipe and water shield 4 Remove the drain plug Allow the water tank to drain then replace the drain plug in its correct position Be careful not to cross thread it 5 Replace the water shield overflow pipe overflow cap cube guide A cube guide B and insulation panel in their correct positions Be careful not to cross thread the overflow pipe 6 Remove all ice from the dispenser unit storage bin Clean the dispenser unit storage bin using a neutral cleaner Rinse thoroughly after cleaning 7 Replace the front panel in its correct position 47
55. ube Secure the bulb with the clamp and holder then insulate it Hot Gas Valves e Replace the strainer when replacing a hot gas valve Liquid Line Valves Install a new capacitor Pump Motor Install a new capacitor Use copper tube of the same diameter and length when replacing valve lines Thermistor Attach the new thermistor to the suction line in the same location as the previous thermistor The thermistor should be at the 12 o clock position on the tube Smoothly fill the recessed area of the thermistor holder with high thermal conductive type sealant Hoshizaki America part number 4A0683 01 Silicone Heat Sink Compound 10 8108 manufactured by GC Electronics KE 4560 RTV manufactured by ShinEtsu Silicones or equivalent are recommended Secure the thermistor with the holder then insulate it Be very careful to prevent damage to the leads Thermistor Lead Thermistor Holder UD 7 __ __ Foam Insulation Cable Tie 41 VI Cleaning and Maintenance This icemaker must be cleaned and maintained in accordance with the instruction manual and labels provided with the icemaker Consult with your local distributor about cleaning and maintenance service To obtain the name and phone number of your local distributor visit www hoshizaki com or call Hoshizaki Technical Support at 1 800 233 1940 in the USA WARNING 1 Except as specified below only qualified service technicians should attempt t
56. ure check for correct installation proper voltage per unit nameplate and adequate water supply Check CB using the steps in IV B Control Board Check Check the dip switch settings to assure that S4 dip switch 3 4 7 8 9 10 and 5 dip switch 1 through 5 are in the factory default position S4 dip switch 1 2 5 6 are cleaning adjustments and the settings are flexible For factory default settings see II C 3 a Default Dip Switch Settings As you go through the procedure check to assure the components energize and de energize correctly If not those components and controls are suspect 1 Turn off the power supply then access the control box Clear any ice from BC 2 Turn on the power supply then move the control switch to the ICE position A 5 second delay occurs The red POWER OK LED and green BC CLOSED LED on CB come on If the yellow BC OPEN LED is on check BC See IV C 1 Bin Control Check 3 1 Minute Fill Cycle LED 4 is on WV energizes After 1 minute CB checks for a closed F S If F S is closed harvest cycle begins If closed continue to step 4 If open WV remains energized through additional 1 minute fill cycles until water fills the tank and closes F S low water safety Diagnosis Confirm that water is filling the water tank If not check that the water supply shut off valve is open and WV screen and any external filters are clear If WV does not energize LED 4 on check CB 6 wire on CB K1
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