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Hoshizaki America, Inc.

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3. 64 Z RM 650MA H EE 65 8 KM 650MWH EE 66 9 KM 650MRH with URC 5F 67 10 KM 901 MAH EE 68 pa utu EE 69 12 KM 901MRH with Ee 70 13 KM 901MRH3 with URC OF eere nnn rn rni a naa hn 71 14 KM 1340MAH M 72 15 KM 1340MW Fi EE 73 16 KM 1340MRH with Ae 74 17a KM 1601MRH with URIO 2 I P ie eedem bk mena eti nh 75 17b KM 16801MRH with URC 22F nena 76 18 KM 1601MRH3 with 2 serta renta sanam nici ci enki 77 18b 1601 with 22 78 C Wiring Diagrams EE 79 1 Diagrams Without Harvest Pump Timer Relays 79 a KM 320M H KM 515M H KM 600MAH nennen 79 b KM 650MAH V 1 and earlier KM 650MWH V 1 and earlier 901 B 0 and earlier KM 901MWH 0 and earlier 80 KM 650MRH V 1 and earlier KM 901MRH 0 and earlier 81 d KM 901MWH 0 1 and later 901 C 1 and 82 e 1340 KM 1340MWH AAA 83 ai KM 1340MRH MUN 84 ME
4. Alarm Buzzer 51 R52 reu 9 5 Part Number POWER OK LED red lights when K5 black Connector Float Switch 10 5VAC is supplied z i to K2 connector SH a 1 8 water level Relay LEDs ES SE ollas Microprocessor 4 indicate which amp l amp o a control board revision relays are energized E z level indicated on label and which K1 on side of relay connector pins are 9 lo energized ate S e K1 Connector e LED 2 X2 Relay iar xu Pins 1 through 10 LED 2 on E 1 9 Magnetic Contactor or K1 Connector Pin 2 ej gt om 25 NEL Compressor Relay LED 2 off e ote 32 Hot Gas Valve 1 Connector Pin R2 aja 3 Fan Motor oR 8 me Liquid Line Valve LED 3 X3 Relay m 77 0 218 4 Pump Motor icemaking LED 3 on Ji E m 242 5 Pump Motor pump out K1 Connector Pin 5 R o SR 6 Inlet Water Valve LED 3 off SR m NC 7 10 Component Power 1 Connector Pin 4 D 42 energized in freeze pe R6 _ S 8 e LED 4 X4 Relay K1
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6. 0 70 21 90 32 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 64 9 500 BTU h 90 F 32 WT 70 F 2190 7 KM 650MAH Specification Sheet AC SUPPLY VOLTAGE 208 230 60 1 3 wire with neutral or 208 230 60 1 AMPERAGE 7 2 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 15A MAXIMUM FUSE SIZE 15A ELECTRIC amp WATER CONSUMPTION 90 70 70 50 ELECTRIC W kWH 100 lbs 1290 5 51 1180 4 30 WATER gal 24HR gal 100 Ibs 101 18 0 232 35 1 ICE PRODUCTION PER CYCLE 14 6 Ibs 6 6 kg 720 pcs BIN CONTROL SYSTEM Thermostat or Mechanical Bin Control REFRIGERANT CHARGE R 404A 1 Ib 8 oz 680g Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C PER 24 HR F C 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 2 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm2G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 11 100 BTU h AT 90 F 32 WT 70 F 21 65 8 KM 650MWH Specification S
7. 09 eB 0563 11 1 E a y L3 1 3 84 9 KM 1601MRH 225726 umno 21 4 YOUMS 430 430 440 440 440 Wutz 13 1135 YOE TOYIN 430 340 34 44 440 440 13 11195 08 1 1 quum 5 m mo ASLL 1e AS OL Indino D JeuuojsueJ lt am Wr um ce E Hao Si Y j ern Wel ap Sah aa 1 211 mo EN ER 31 i cn 4 C y 1 YT 1 1 I id 1 2 MS 17011 H 101 P Te mei i YAY 1 MEN EE iyi 9 A y 353 1 j KM 901MRH3 KM 1601MRH3 AS OL JLIH JLIH
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12. d pH al e d pul mu T E oll I fi 05534 eh dee NOE o 1 ut ITT Losst 4 4 5 e ni _ 1081009 NI 3n ho 1 UIHDHL 4504 pil 1 82 e KM 1340MAH KM 1340MWH 22 82 22222 umno 2 8 po 5 ES Se SS 13 1145 v08 1091 4301430 44 43 430 440 H 440 330 330 44 440 440 HY c I WM 11135 HI e ele VOL 104 7 4 mm Ouren gt TUL ped AS OLIndinp e JeuuojsueJ j ouoo gt 3m Tg n H 1 3177 pod NO THAIN YJ 10H 11 a m Lei 1 ur 3 id 11111 Eeer L 4 40553 Bas 3i we 71 S sH E 12974 T 1 E 11011 4 CH Uri L Seck EI Eo EU E EST T
13. Performance Data APPROXIMATE ICE PRODUCTION PER AMBIENT TEMP WATER TEMP F C 50 10 70 21 90 32 24 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 CONSUMPTION 70 21 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 cm2G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm2G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 22 600 BTU h AT 90 F 32 C WT 70 F 21 72 15 KM 1340MWH Specification Sheet AC SUPPLY VOLTAGE 208 230 60 1 3 Wire with neutral AMPERAGE 9 2A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC 8 WATER CONSUMPTION 90 70 F 70 50 ELECTRIC W KWH 100 lbs 2010 3 6 1980 3 4 WATER 1 24 gal 100 Ibs 308 23 2 453 32 3 WATER COOLED CONDENSER 1656 125 980 70 gal 24HR gal 100 165 ICE PRODUCTION PER CYCLE 28 6 Ibs 13 0 kg 1440 pcs BIN CONTROL SYSTEM Thermostat REFRIGERANT CHARGE R 404A 2 1 5 oz 950g Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C PER 24 HR F C 70 21 80 27 90 32 165 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
14. Rubber Boot Fig 4 35 F Thermistor Check To check thermistor resistance follow the steps below 1 Turn off the power supply 2 Remove the front panel Move the control switch to the OFF position 3 Remove the control box cover 4 Remove the thermistor from the refrigerant tubing 5 Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 min 6 Disconnect the thermistor connector from CB connector and check the resistance between thermistor leads Normal range is 4 7 to 6 2 If outside the normal range replace the thermistor See IV B Component Service Information If within the normal range continue to the next step 7 Replace the thermistor in its correct position See IV B Component Service Information 8 Reconnect the thermistor connector to CB K3 connector 9 Replace the control box cover in its correct position 10 Move the control switch to the ICE position 11 Replace the front panel in its correct position 12 Turn on the power supply 13 Once the harvest cycle starts Comp energizes begin timing the harvest cycle 14 The harvest timer and harvest cycle should terminate within 2 to 5 min If the harvest cycle does not terminate within 2 to 5 min replace CB Legend CB control board Comp compressor 36 Diagnostic Tables 1 No Ice Production No Ice Production Possible Cause 1 Power Supply a Off blown
15. 618 Highway 74 South Peachtree City GA 30269 Attn Hoshizaki Technical Support Department Web Site www hoshizaki com NOTE To expedite assistance all correspondence communication MUST include the following information Model Number Serial Number Complete and detailed explanation of the problem IMPORTANT This manual should be read carefully before the appliance is serviced Read the warnings and guidelines contained in this manual carefully as they provide essential information for the continued safe use service and maintenance of the appliance Retain this manual for any further reference that may be necessary CONTENTS important Satety eat E 6 I Construction and Water Refrigeration Circuit Diagram etr rines 8 A SUI 5 8 1 Air Cooled Models MAH E 8 2 Water Cooled Models NIVEL ee 9 3 Remote Models WEEN 10 gie E ee lire LC E 11 1 Air Cooled Models MAH E 11 2 Water Cooled Models MWH 12 a Remote Models uiae ben E R k 13 Sequence of Operation and Service Diagnosis 14 Sequence of Operation Flow 14 1 E Control Board without Harvest Pump Timer Operation 14 2 Control Board with Harvest Pump Timer Operation 16 B Etienne 17 1 E Control Board without Har
16. Ibs day kg day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR gal day m3 day FREEZING CYCLE TIME min HARVEST CYCLE TIME min HEAD PRESSURE PSIG kg cm2G SUCTION PRESSURE PSIG 26 TOTAL HEAT OF REJECTION FROM CONDENSER TOTAL HEAT OF REJECTION FROM COMPRESSOR CONDENSER VOLUME 208 230 60 1 3 wire with neutral or 208 230 60 1 11 6A 5 Min Freeze AT 104 F WT 80 F 20A 20A 90 70 70 50 F 1770 5 4 70 21 0 0 152 19 3 10 0 0 13 5 Ibs 6 1 kg 720pcs Thermostat or Mechanical Bin Control R404A 9 165 4 oz 42009 Icemaker 5 Ibs 5 oz Cond Unit 3 Ibs 15 oz AMBIENT TEMP F C 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 WATER TEMP F C 50 10 70 21 14 000 BTU h AT 90 F 32 WT 70 F 21 2 200 BTU h AT 90 F 32 WT 70 F 21 C 121 CU IN URC 9F 70 13 901 with URC 9F Specification Sheet AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 Ibs WATER gal 24HR gal 100 Ibs ICE PRODUCTION PER CYCLE BIN CONTROL SYSTEM TOTAL REFRIGERANT CHARGE REFRIGERANT CHARGE BY UNIT Performance Data APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg da
17. Same as the initial harvest cycle Return to step 5a above Note Appliance continues to cycle until MBC is satisfied or power is switched off The appliance always restarts at the 1 min fill cycle 9 Shutdown Mechanical Bin Control See 11 0 2 Mechanical Bin Control Check Legend BC bin control CB control board Comp compressor valve EM Zon motor FMR fan motor remote FS float switch HGV hot gas valve HM headmaster C P R HPS high pressure switch LLV liquid line valve MBC mechanical bin control PM pump motor TXV thermostatic expansion valve WRV water regulating Valve WV inlet water valve 29 C 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 icemaker starts at the 1 minute fill cycle For audible alarm information see LED Lights 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 G CB 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 Defa
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19. 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 cm2G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm2G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 20 400 BTU h AT 90 F 32 WT 70 F 21 TOTAL HEAT OF REJECTION FROM COMPRESSOR 2 800 BTU h 90 F 32 WT 70 F 21 C WATER FLOW FOR CONDENSER 114 AT 100 F 38 WT 90 F 32 PRESSURE DROP OF COOLING WATER LINE less than 10 PSIG 73 16 KM 1340MRH with URC 14F Specification Sheet AC SUPPLY VOLTAGE 208 230 60 1 3 wire with neutral AMPERAGE 9 5A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC amp WATER CONSUMPTION 90 70 F 70 50 ELECTRIC W KWH 100 Ibs 2360 4 5 2130 3 7 WATER gal 24HR gal 100 Ibs 229 18 3 451 32 2 ICE PRODUCTION PER CYCLE 28 7 lbs 13 0 kg 1440 pcs BIN CONTROL SYSTEM Thermostat TOTAL REFRIGERANT CHARGE R 404A 9 14 7 oz 4 5009 REFRIGERANT CHARGE by UNIT Icemaker 5 Ibs 8 2 oz Cond Unit 4 Ib 6 5 oz Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C PER 24 HR F C 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 TIM
20. After 1 min the 1 min fill cycle should end and the initial harvest cycle should begin If the initial harvest cycle begins FS is good and the check is complete If the initial harvest cycle does not begin continue to step 9 9 10 11 12 Turn off the power supply Remove the front panel Move the control switch to the OFF position Remove the control box cover Disconnect FS connector from CB K5 connector 34 13 Check for continuity across FS leads With the water tank full FS should be closed If FS is closed and the icemaker will not switch from the 1 min fill cycle to the initial harvest cycle replace CB If FS is open confirm that the water tank is full If the water tank is not full check the water supply water filters and inlet water valve If the water tank is full follow the steps in 2 Float Switch Cleaning After cleaning FS check it again Replace if necessary Legend CB control board FS float switch 2 Float Switch Cleaning Depending on local water conditions scale may build up on FS Scale on the switch can cause the float to stick In this case FS should be cleaned 1 Turn off the power supply 2 Remove the front panel then move the control switch to the OFF position 3 Drain the water tank On KM 320M H KM 515M H KM 600M KM 650M H and KM 901M H remove the base cover then disconnect one end of the pump tubing to drain the water tank See Fig 3 A
21. Float Switch Check To check FS follow the steps below 1 Turn off the power supply 2 Remove the front panel then move the OFF iftam Disconnect This control switch to the OFF position End of Pump 3 Drain the water tank Tubing to Drain Water Tank a On KM 320M H KM 515M H KM 600M H KM 650M H and KM 901M H remove the base cover then disconnect one end of the pump tubing to drain the water tank See Fig 3 After the Base Cover Fig 3 water tank has drained reconnect the pump tubing b On KM 1340M H and KM 1601M H remove the rubber cap covering the overflow pipe in the water tank Remove the overflow pipe by turning it counterclockwise After the water tank has drained replace the overflow pipe and the rubber cap in their correct positions Note Be sure the overflow pipe o ring is in its correct position on the overflow pipe 4 Remove the control box cover 5 Disconnect FS connector from CB K5 connector 6 Check for continuity across FS leads With the water tank empty FS should be open If open continue to step 7 If closed follow the steps in II E 2 Float Switch Cleaning After cleaning FS check it again Replace if necessary 7 Reconnect FS connector to CB K5 connector then replace the control box cover in its correct position 8 Move the control switch to the ICE position Replace the front panel in its correct position then turn on the power supply
22. LED 4 is on WV energizes After 1 min CB checks for closed FS If FS is closed harvest cycle begins If harvest cycle begins Comp HGV and FMR energize continue to step 5 If FS is open WV remains energized through additional 1 min fill cycles until water enters the water tank and FS closes low water safety protection during initial start up and at the end of each harvest Diagnosis Check that water enters the water tank If not check that the water supply line shut off valve is open and screens or external filters are clear Check for 115 at CB K1 6 to neutral W If 115VAC is not present replace CB If 115VAC is present and WV does not energize check for 115VAC at WV If 115VAC is present check coil continuity If open replace WV If the water tank fills but the appliance fails to start harvest Comp energized check for open FS See Float Switch Check and Cleaning If FS is closed and CB fails to start the harvest cycle after 1 min replace CB 5 Initial Harvest Cycle LEDs 1 4 and 2 are on WV continues Comp FMR and HGV 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 3 9 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 180 sec The pump out timer S4 dip switch 3 amp 4 acts in place o
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24. neutral cleaner to wipe off oil or dirt build up Clean any chlorine staining rust colored spots using a non abrasive cleanser Underside of Wipe down with a clean cloth and warm water Icemaker and Top Kits Bin Door and Snout Yearly Icemaker and Clean and sanitize per the cleaning and sanitizing instructions provided Dispenser in the instruction manual or maintenance label on the icemaker Storage Bin Liner system Clean the water supply inlet screen Condenser Inspect Clean if necessary by using a brush or vacuum cleaner More frequent cleaning may be required depending on location Inspect the water hoses and clean replace if necessary 55 VI Preparing the Appliance for Periods of Non Use NOTICE When storing the appliance for an extended time or in sub freezing temperatures follow the instructions below to prevent damage To prevent damage to the water pump do not operate the appliance with the control switch in the WASH position when the water tank is empty When the appliance is not used for two or three days under normal conditions it is sufficient to move the control switch to the OFF position When storing the appliance for an extended time or in sub freezing temperatures follow the instructions below 1 Remove the water from the icemaker water line 1 Turn off the power supply then remove the front panel 2 Close the icemaker water supply line shut off valve and open the ice
25. 1 AMPERAGE 11 4 A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC amp WATER CONSUMPTION 90 70 70 50 F ELECTRIC W kWH 100 lbs 1740 5 1 1670 4 4 WATER gal 24HR gal 100 Ibs 130 16 0 292 31 7 ICE PRODUCTION PER CYCLE 14 2 Ibs 6 5 kg 720pcs BIN CONTROL SYSTEM Thermostat or Mechanical Bin Control REFRIGERANT CHARGE R404A 2 Ib 15 13239 Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C 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 3 100 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 cm2G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG _ kg cm2G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 15 600 BTU h AT 90 F 32 WT 70 F 21 68 11 KM 901MWH Specification Sheet AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 lbs WATER gal 24HR gal 100 Ibs WATER COOLED CONDENSER gal 24HR gal 100 Ibs ICE PRODUCTION PER CYCLE BIN CONTROL SYSTEM REFRIGERANT CHARGE Performance Data APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day APPROXIMATE ELECTRI
26. 5 4 6 is factory set and generally no adjustment is required However the pump out frequency control can be set to have a pump out occur every cycle or every 2 5 or 10 cycles For details see 4 Pump Out Frequency Control S4 dip switch 5 amp 6 Pump Out Diagnosis In the freeze cycle before pump out see table above after 5 min of freeze disconnect CB black K5 connector FS connector Check that PM stops and re starts and that PM rotation is correct water flowing down the drain through CV If PM does not stop and re start check that CB LEDs 1 3 and 2 are on If not replace CB If LEDs 1 and 2 and PM does not energize check for 115VAC at CB K1 5 to neutral W If 115VAC is not present replace CB If 115VAC is present check that X10 relay is de energized If not check X11 relay status If X11 relay is energized replace CB If X11 relay is de energized and X10 relay is energized replace X11 relay contacts sticking If X10 relay is de energized check for 115VAC at terminal 6 to neutral W and terminal 2 to neutral W If 115VAC is present on terminal 6 DBU and not on terminal 2 DBU replace X10 relay If PM is energized and rotating in pump out rotation make sure the drain line is not clogged and that CV is clean and operating properly Confirm FM and LLV de energize If FM or LLV are energized with LEDs 1 3 and 2 on replace CB 8 Normal Harvest Cycle
27. Connector Pin 6 WB RIO X Switch for C control board and ALPINE control board service control board only Set to ALP for appliances covered in this manual e LED 1 X1 Relay K1 Connector Pin 1 9 K2 Connector Control Transformer 10 5VAC E Control Board Part Number 2A1410 02 42 2 G Control Board G Control Board Bin Control Switch Closed LED green m OUTPUT TEST Button 6 S4 Dip Switch 2 4 ALARM RESET Button P used to test relays on control board in thermostatic bin control application 00098209 Control Switch Open LED yellow mechanical bin control application only K3 white Connector Thermistor harvest control and high temperature safety Part Number K4 red Connector Mechanical Bin Control or Jumper thermostatic bin control application S5 Dip Switch Alarm Buzzer xl ooo POWER OK LED red lights when 10 5VAC is supplied to K2 connector Relay LEDs 4 indicate which relays are energized K5 black Connector Float Switch water level TX RED WHITE Label control board revision level indicated on label w K D2 P N 243792 01 s E99 4 599 890 and which K1 d connector pins are EE energized ___ K1 Connector LED 2 X2 Relay ex Pins 1 through
28. F 21 C 441 CU IN URC 21F 77 18b KM 1601MRH3 with URC 22F Specification Sheet AC SUPPLY VOLTAGE 208 230 60 3 AMPERAGE 8 4A 5 Freeze 104 WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC amp WATER CONSUMPTION 90 70 70 50 F ELECTRIC W kWH 100 Ibs 2640 4 55 2460 3 97 WATER gal 24HR gal 100 Ibs 267 19 2 498 33 5 ICE PRODUCTION PER CYCLE 28 3 Ibs 12 8 kg 1440 pcs BIN CONTROL SYSTEM Thermostat REFRIGERANT CHARGE R 404A 22 4 3 oz 10 1009 Icemaker 14 Ibs 8 8 oz Cond Unit 7 Ib 11 5 oz Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C 24 F C 50 10 70 21 90 32 70 21 80 27 90 32 lbs 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 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 24 300 BTU h 90 F 32 WT 70 F 219 TOTAL HEAT OF REJECTION FROM COMPRESSOR 3 200 BTU h AT 90 F 32 WT 70 F 21 C CONDENSER VOLUME 214 CU IN URC 22F 78 C Wiring Diagrams 12 JeuloJsueJ 1 Diagrams Without H
29. MBC 4 Disconnect MBC connector from CB K4 connector then remove MBC from the icemaker 5 Remove the actuator paddle from the switch mount See Fig 2 6 Wipe down MBC with a mixture of 1 part of Hoshizaki Scale Away and 25 parts of warm water Rinse the parts thoroughly with clean water 7 Reassemble MBC and replace it in its correct position Note If the magnet was removed for cleaning be sure to replace it in its correct position 8 Reconnect MBC connector to CB K4 connector then move the control switch to the ICE position 9 Replace the control box cover in its correct position 10 Turn on the power supply to start the automatic icemaking process 11 Replace the front panel in its correct position Legend MBC mechanical bin control MBC Wire KM 901M Harness white MBC Bracket Connector Switch Mount Actuator Paddle MBC Connector to control board K4 red connector Bin Control Proximity Switch Bin Control Proximity Switch Closed Open bin full calling for ice icemaker off or shutting down Magnet Fig 2 Model Shown KM 901M H 3 33 E Float Switch Check and Cleaning FS is used to determine that there is sufficient water in the water tank after the 1 min fill cycle and after each harvest cycle FS is also used to determine that the appropriate volume of water has been converted into ice before switching out of the freeze cycle No adjustment is required 1
30. MM 85 h KM 901MRH3 KM 1601MRH3 86 2 Diagrams With Harvest Pump Timer 87 a eris p 87 b 65 V 2 to C 2 KM 650MWH V 2 to C 2 KM 901 MAH 1 to P ne 88 c KM 650MAH D 1 and later KM 650MWH D 1 and later 901 0 1 and later 89 d KM 650MRH V 2 to GT NEE 90 KM 6550MRH C2 arid xa ER Ea Sm bee En Rx NP 91 Important Safety Information Throughout this manual notices appear to bring your attention to situations which could result in death serious injury damage to the appliance or damage to property WARNING Indicates a hazardous situation which could result in death or serious injury NOTICE Indicates a situation which could result in damage to the appliance or property IMPORTANT Indicates important information about the use and care of the appliance WARNING The appliance 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 Failure to service and maintain the appliance in accordance with this manual will adversely affect safety performance component life and warranty cov
31. amp 2 Check discharge line temperature For a thermistor check see Thermistor Check If 1 min fill cycle starts after harvest timer terminates check that FS is clean and operating properly see Float Switch Check and Cleaning If FS is closed CB proceeds to the next cycle If not replace CB Note The minimum total time allowed by CB for a complete harvest cycle is 2 min Maximum harvest time allowed is 20 min NOTICE On models with G control board and no harvest pump timer relays S4 dip switch 7 must remain off Otherwise PM energizes in reverse direction the last 50 seconds of harvest and empties water from water tank 6 Freeze Cycle LED 1 is on Comp and FMR continue PM FM and LLV energize WV and HGV de energize Appliance is held in freeze by a 5 min short cycle protection timer After 5 min timer terminates and FS opens freeze cycle terminates a Freeze Cycle Diagnosis Confirm Comp and FMR continue Confirm that PM FM and LLV energize Confirm WRV opens Next confirm WV and HGV de energize During the first 5 min of freeze confirm evaporator is cooling If not confirm WV de energized not leaking by HGV de energized not bypassing LLV and FM energize TXV and HM operate correctly WRV opens Comp is efficient and refrigerant charge is correct See VIII A Specification Sheet and VIII B Performance Data b Comp and FMR Diagnosis If Comp and FMR de energize once freeze begins ch
32. connector 10 pin connector pull CB K1 connector out slightly to allow room for multimeter test leads contact 1 Turn off the power supply then access the control box Move the control switch to the OFF position Clear any ice from BC 2 Check that the 115VAC 10A fuse is good 1 E and Control Board without Harvest Pump Timer Diagnosis 3 Power On Turn on the power supply then move the control switch to the ICE position A 5 sec delay occurs E Control Board CB red POWER LED turns on Control Board CB red POWER OK LED and green BC CLOSED LED turn on Note CB red POWER LED remains on unless the 10 5VAC power supply is interrupted K2 connector Check CB using the steps in II C Control Board Check CB with Thermostatic Bin Control If yellow BC OPEN LED is on check that CB red K4 connector has jumper 4A4883G01 properly connected CB with Mechanical Bin Control If yellow BC OPEN LED is on indicating a full bin check See 11 0 2 Mechanical Bin Control Check and Cleaning a Power On Diagnosis If CB red POWER OK LED is off confirm closed TBC and 10A fuse is good If TBC is open remove ice from bulb and warm bulb in hand If TBC does not close replace See 11 0 1 Thermostatic Bin Control Check Check for 115VAC at control switch 1 BR to neutral W then at control switch 2 P to neutral W If 115VAC is present on 1 BR an
33. 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 icemaker when 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 WHITE K4 RED and K5 BLACK because the same connector is used for the thermistor mechanical bin control and float switch K4 RED is not used on E control board models Do not short out power supply to test for voltage Always replace the whole control board assembly if it goes bad 41 A Control Board Layout 1 E Control Board E Control Board OUTPUT TEST Button ALARM RESET Button 54 Dip Switch used to test relays on control board ALARM RESET 1 a 00088 0 EST O A O L K3 white Connector Thermistor harvest control and high temperature safety Freeze Timer LED yellow 54 RB R15 u sri CH LED orange R16 R33 C C8 1 29 ET PT m R25 R22 R26 C6 R14 16 9 K3 RED WHITE R24 K4 red Connector Open
34. first pump out is dependent on CB E CB first pump out is after the first freeze cycle CB first pump out is determined by S4 dip switch 5 amp 6 See the table below E amp G Control Board Settings tstPump Out 4 Dip Switch Settin T 9 Pump Out E Control Board G Control Board Frequency ON OFF ON Comp and FMR continue HGV energizes If S4 dip switch 3 amp 4 are set to 3 off and 4 on LED 4 turns on and WV energizes FM and LLV de energize PM stops for 2 sec then reverses for 10 20 sec depending on pump out timer S4 dip switch 3 amp 4 setting When the pump out timer terminates pump out is complete The pump out frequency control S4 dip switch 5 amp 6 is factory set and generally no adjustment is required However the pump out frequency control can be set to have a pump out occur every cycle or every 2 5 or 10 cycles For details see III C 4 Pump Out Frequency Control S4 dip switch 5 amp 6 Pump Out Diagnosis the freeze cycle before pump out see table above disconnect CB black K5 connector FS connector after 5 min of freeze Check that PM stops and re starts and water is flowing down the drain through CV If PM does not stop and re start check that CB LEDs 1 3 and 2 are on If not replace CB If LEDs 1 3 and 2 are on and PM does not energize check for 115VAC at CB K1 5 DBU to neutral W If 115VAC is not present replace CB If 115VAC is present make sure
35. fuse or tripped breaker b Not within specifications 2 Main Transformer a Voltage tap switch not set to proper voltage transformer and all 208 230 60 3 Models 4 Thermostatic Bin Control See ILD Bin Control Check 5 Control Switch 6 High Pressure Switch 7 Control Transformer Coil winding open or shorted a 115VAC 10 5VAC Contro Board See Control Board Check Yellow BC OPEN LED on bin full G control board 3 Mechanical Bin Contra 10 Water Supply i e 11 Inlet Water Valve 12 Float Switch See Float Switch Check b Defective and Cleaning 13 Compressor a Compressor relay magnetic contactor contacts bad or coil winding open b Start capacitor or run capacitor defective single phase C Internal protector open d Start relay contacts bad or coil winding open single phase e Compressor defective 37 No Production Possible Cause 14 Hot Gas Valve Closed in harvest cycle b Open in freeze cycle 15 Thermistor Loose disconnected or defective See Thermistor Check 16 Pump Motor a Motor winding open b Bearing worn out or locked rotor Defective capacitor d Mechanical seal worn out 17 Thermostatic Expansion Valve Bulb loose b Operating erratically 16 Liquid Line Valve Keier 19 Fan Motor 2 Freeze Up Defrost and clean the icemaker prior to diagnosing freez
36. is warming If not confirm that Comp energizes If not check for 115VAC at K1 1 or 9 V to neutral W If 115VAC is not present check for 115VAC at K1 7 or 10 BR to neutral W If 115VAC is present at 7 or 10 BR and not at 1 or 9 V replace CB If 115VAC is present check for 115VAC at CR or MC solenoid If 115VAC is present confirm contacts are closed If not replace CR or MC If CR or MC contacts are closed check Comp external overload Comp start and run capacitors Comp start relay and Comp motor winding If Comp is energized and evaporator is not warming check that HGV energizes and opens Check for 115VAC at CB K1 2 P to a neutral W If 115VAC is not present and LED 2 is on replace CB If 115VAC is present check coil voltage and continuity Replace as needed Confirm that LLV is de energized and closed not bypassing If energized replace CB If de energized and bypassing replace LLV Confirm WRV is not leaking by If evaporator is warming PM energizes for the last 50 sec of harvest b HGV Diagnosis If Comp is energized and evaporator is not warming check that HGV energizes and opens Check for 115VAC at CB K1 2 P to neutral W If 115VAC is not present replace CB If 115VAC is present check for 115VAC at HGV coil and check HGV coil continuity Replace as needed LLV Diagnosis Confirm that LLV is de energized and closed not bypassing If energized replace CB If de energized and bypa
37. lt gt 7 EU Se E 15 Fe gt b i y WER 1131 Un il ah oii 5 3 wa ug GI NE M 19014 e d Sch 1001 BS ISI 31 yog 04 Tara d KM 650MRH V 2 to C 1 28 90 e KM 650MRH C 2 and later Olsd 22222 umno ainsseld uBIH x 440 430 330 B 3301 335 43 440 440 44 13 13 3009 40702 Zou NILI3S 5 n ele A H 9 YHL G 1 d GH JeuuojsueJ Li F 30 S 011 E Hi EBI HA x J gt HA 3 n i j Ip d 7 10H di n m Mee d DNO HSYN DI 1 21 pH H Hi T mu NN 2 Ls E 506534 Die 1 41414 ER j T d 1 ly Jy
38. off and 4 on Pump does not run in pump out rotation in this setting When a pump out is called for the pump motor stops for 2 sec then energizes in the reverse direction taking water from the bottom of the water tank and forcing pressure against the check valve seat allowing water to go through the check valve and down the drain At the same time water flows through the small tube to power flush the float switch The pump motor 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 and generally no adjustment is required However where water quality is bad and the icemaker needs a longer pump out time the pump out timer can be adjusted The pump out timer control can be set to pump out for 10 or 20 sec S4 Dip Switch Setting Inlet Water Valve 0 ON 20 T1 Time to drain the water tank T2 Harvest timer at pump out 20 47 4 Pump Out Frequency Control S4 dip switch 5 amp 6 NOTICE Do not adjust on KM 515M H without harvest pump timer Adjustments to this setting on KM 515M H without harvest pump timer may adversely affect performance and warranty coverage The pump out frequency control is factory set to drain the water tank every 10 cycles on all KM 320M H KM 600MAH KM 650M H 901 and on KM 515MAH with harve
39. out timer wv setting The built in safeties shut down the icemaker and have alarms as listed below No of Beeps High Evaporator Temp Check for harvest problem stuck or relay hot temperature gt 127 F 53 C water entering icemaker or shorted thermistor Harvest Backup Timer Orange H TIMER LED on harvest gt 20 min for two cycles Check for open thermistor HGV not opening TXV or in a row LLV leaking by low charge or inefficient Comp or WRV leaking by Freeze Timer Yellow F TIMER LED on freeze gt specified setting for Check for FS stuck closed up WV leaking by HGV two cycles in a row leaking by PM not pumping TXV not feeding properly LLV not opening low charge HM not bypassing or inefficient Comp To reset the above safeties press the ALARM RESET button with the power supply on ELE Low Voltage Red LED turns off if voltage protection operates 92 5 or less The control voltage safeties automatically reset when 7 High Voltage voltage is corrected 147Vac 5 or more Legend Comp compressor FM fan motor FWR fan motor remote FS float switch HGV hot gas valve HM headmaster LLV liquid line valve PM pump motor TXV thermostatic expansion valve WRV water regulating valve WV inlet water valve 44 2 G Control Board At startup a 5 second delay occurs while the control board conducts an internal timer check A beep occurs when the control switc
40. refrigerant pressures See VIII B Performance Data Next check HM operation If refrigeration pressures are above HM setpoint and HM is bypassing replace HM Check TXV for proper operation Remove TXV bulb and hold it in your hand refrigerant low side pressure should rise place TXV bulb in ice water refrigerant low side pressure should drop A 10 to 15 pound pressure swing between warm and cold conditions indicate a good TXV If a 10 to 15 pound swing is not present replace TXV 9 WRV Diagnosis WRV is factory set and generally no adjustment is required If WRV fails to open in freeze check for proper refrigerant pressures See VIII B Performance Data If refrigerant pressures are correct and WRV does not open adjust or replace as needed See IV C Water Regulating Valve Adjustment water cooled models h Freeze Termination Diagnosis After 5 min in freeze disconnect CB K5 FS connector 15 sec later appliance should switch out of the freeze cycle 15 second delay after FS opens before terminating the freeze cycle If appliance remains in freeze longer than 15 sec after FS removed replace CB If appliance switches with FS removed but would previously not switch out of freeze with FS connected long freeze beep alarm see Float Switch Check and Cleaning Note Normal freeze cycle will last 20 to 40 min depending on model and conditions Cycle times and pressures should follow performance data provided in this m
41. restricted Clean if necessary See II D 2 b Mechanical Bin Control Cleaning If MBC switch still reads closed replace MBC 8 Reconnect MBC connector to CB K4 connector then move the control switch to the ICE position Turn on the power supply 9 Check that CB green BC CLOSED LED is on 10 Allow the icemaker to cycle on Press and hold the actuator paddle CB yellow BC OPEN LED should turn on and the icemaker should shut down according to the chart below If it does not replace CB Cycle at Mechanical Bin Control Activation Fill Cycle 15 sec after activation Harvest Cycle At the end of the harvest cycle or up to 15 sec into the freeze cycle if activated at the end of the harvest cycle Freeze Cycle 15 sec after activation if activated at least 15 sec before the 5 min short cycle protection timer terminates Otherwise at the end of the next harvest cycle Legend MBC mechanical bin control CB control board 32 b Mechanical Bin Control Cleaning Scale may build up on MBC Scale can cause the actuator paddle and magnet to stick In this case MBC should be cleaned WARNING CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after the icemaker is serviced Make sure that none have fallen into the dispense unit ice storage bin 1 Turn off the power supply 2 Remove the front panel then move the control switch to the OFF position 3 Clear any ice away from
42. the drain line is not clogged and that CV is clean and operating properly Confirm FM and LLV de energize If FM or LLV is energized with LEDs 1 3 and 2 on replace CB 8 Normal Harvest Cycle Same as the initial harvest cycle Return to step 5 above Note Appliance continues to cycle until TBC or MBC is satisfied or power is turned off The appliance always restarts at the 1 min fill cycle 22 9 Shutdown Thermostatic Bin Control TBC When the appliance is running hold ice in contact with the thermostatic bulb TBC switch opens within 10 sec shutting down the appliance TBC is factory set and generally no adjustment is required However adjustment may be needed in some conditions particularly at higher altitude locations NOTICE On E control boards do not adjust S4 dip switch 7 out of the factory default position This dip switch must be left in the factory default position or the appliance will not operate correctly e On control boards CB red K4 connector jumper 4A4883G01 must be in place Diagnosis See 11 0 1 Thermostatic Bin Control Check b Mechanical Bin Control See II D 2 Mechanical Bin Control Check and Cleaning Legend BC bin control CB control board Comp compressor valve FM fan motor FMR fan motor remote FS float switch HGV hot gas valve HM headmaster C P R HPS high pressure switch LLV liquid line valve MBC mechanical bin control PM pu
43. 00 Ibs 83 18 5 231 43 9 ICE PRODUCTION PER CYCLE 10 2 Ibs 4 6 kg 480pcs BIN CONTROL SYSTEM Thermostat or Mechanical Bin Control REFRIGERANT CHARGE R404A 1 Ib 7 3 oz 660g Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C 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 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 9 500 BTU h AT 90 F 32 C WT 70 F 21 C 61 4 515 Specification Sheet AC SUPPLY VOLTAGE 115 60 1 AMPERAGE 9 6 A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC 4 WATER CONSUMPTION 90 70 70 50 ELECTRIC W kWH 100 lbs 960 5 14 920 4 8 WATER 24 gal 100 Ibs 103 23 0 180 39 0 WATER COOLED CONDENSER 473 106 263 57 gal 24HR gal 100 Ibs ICE PRODUCTION PER CYCLE 10 Ibs 4 5 kg 480pcs BIN CONTROL SYSTEM Thermostat or Mechanical Bin Control REFRIGERANT CHARGE R404A 0 Ib 14 8 oz 420g Performance Data APPROXIMATE ICE PRODUCTION AMBIENT WATER TEMP F C PER 24 HR TEMP F C 70
44. 10 LED 2 on 1 9 Magnetic Contactor or K1 Connector Pin 2 9 5 Compressor Relay LED 2 off C 2 Hot Gas Valve K1 Connector Pin 3 ai 3 Fan Motor R LED 3 X3 Relay Liquid Line Valve LED 3 on x 34 Pump Motor icemaking K1 Connector Pin 5 50 5 Motor LED 3 off harvest pump timer K1 Connector Pin 4 pump out energized in freeze D 6 Inlet Water Valve 7 10 Component Power LED 4 X4 Relay o Supply K1 Connector Pin 6 8 LED 1 X1 Relay K1 Connector Pin 1 9 K2 Connector Control Transformer 10 5VAC G Control Board Part Number 2A3792 01 43 B LED Lights and Audible Alarm Safeties 1 E Control Board At startup a 5 second delay occurs while the control board conducts an internal timer check A beep occurs when power is turned off The red POWER 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 POTES ER 1 Fill Cycle pe wy minute ___ Harvest Cycle Comp FMR HGV WV 3 to 5 minutes Comp FM FMR PM 5 minutes freeze timer 30 to 35 minutes LLV setting Comp FMR PM 10 seconds 20 seconds pump
45. 15 2 G Control Board with Harvest Pump Timer Operation zejd y Jo episino eui pue pasoj eui perjddns 19 eM 19 UI AM eui pinbii ATT 10U A9H uonisod ur peoejd SI BU 116189 JOU ejejduioo Burzniues pue Jaye Buiueej 9501 1 y JO pue episino y pue uedo eA eA BU 5 12064 uej 1N 4 JosseJduioo duio5 SI Ie od uonisod 34 Ul ueuM y 5 pue 51 YO IMS eui uo HS VM 941 HSVM 51 syueuoduio Jo Q3 1 uo 35010 9915 uo Q31 1oyenjoe pezi amp jeue ep Jo 95019 9915 JAN senunuoo q31 N3dO
46. 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 cm2G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm2G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 8 200 BTU h AT 90 F 32 C WT 70 F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 1 300 BTU h AT 90 F 32 C WT 70 F 219 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 62 5 KM 515MRH with URC 5F Specification Sheet AC SUPPLY VOLTAGE 115 60 1 AMPERAGE 11 3A 5 Min Freeze 104 80 MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC amp WATER CONSUMPTION 90 70 70 50 F ELECTRIC W kWH 100 Ibs 1090 5 8 1000 4 9 WATER gal 24HR gal 100 Ibs 94 20 8 198 40 4 ICE PRODUCTION PER CYCLE 10 3 Ibs 4 7 kg 480pcs BIN CONTROL SYSTEM Thermostat or Mechanical Bin Control TOTAL REFRIGERANT CHARGE R404A 4 Ibs 4 8 oz 19509 REFRIGERANT CHARGE BY UNIT Icemaker 2 Ibs 6 8 oz Cond Unit 1 Ibs 14 oz Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP PER 24 HR 70 21 80 27 90 32 Ibs day kg day 100 38 APPROXIMATE ELEC
47. 2G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm2G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 23 400 BTU h AT 90 F 32 WT 70 F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 3 200 BTU h AT 90 F 32 C WT 70 F 21 CONDENSER VOLUME 441 CU IN URC 21F 75 17b KM 1601MRH with URC 22F Specification Sheet AC SUPPLY VOLTAGE 208 230 60 1 3 wire with neutral AMPERAGE 11 6 A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC amp WATER CONSUMPTION 90 70 70 50 F ELECTRIC W kWH 100 lbs 2740 4 64 2590 4 17 WATER gal 24HR gal 100 Ibs 264 18 6 521 34 9 ICE PRODUCTION PER CYCLE 27 9 165 12 7 kg 1440 pcs BIN CONTROL SYSTEM Thermostat REFRIGERANT CHARGE w URC 22F R 404A 2216 4 3 oz 10 1009 Icemaker 14 Ibs 8 8 oz Cond Unit 9 Ib 11 2 Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C 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 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 cmG 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cmG 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 27 400 BTU h AT 90 F 32 WT 70
48. 5 in harvest to K1 4 R in freeze a Freeze Cycle Diagnosis Confirm Comp FMR and PM continue Confirm that FM and LLV energize Confirm WRV opens Next confirm HGV and X10 relay de energize During the first 5 min of freeze confirm evaporator is cooling If not confirm WV de energized not leaking by HGV de energized not bypassing LLV and FM energize TXV and HM operate correctly WRV opens Comp is efficient and refrigerant charge is correct See VIII A Specification Sheet and VIII B Performance Data b Comp and FMR Diagnosis If Comp and FMR de energize once freeze begins check that appliance has not shut off on HPS POWER OK LED off If so check 3 b HPS Diagnosis above If POWER OK LED is on check for 115VAC CB K1 1 V or 9 V to neutral If 115VAC is not present and LED 1 is on replace CB If 115VAC is present check for 115VAC at CR or MC coil If 115VAC is present check CR or MC coil and contact continuity Replace as needed If CR or MC is okay check Comp start relay and start and run capacitors Next check Comp motor winding continuity If Comp is energized but evaporator is not cooling check for an inefficient Comp See VIII B Performance Data If Comp is energized but FMR is not check for 115VAC at the FMR junction box If 115VAC is not present check icemaker wiring connections If 115VAC is present check for voltage at condenser unit If 115VAC is not present check field w
49. 70 50 ELECTRIC W kWH 100 lbs 690 5 2 710 4 9 WATER gal 24HR gal 100 Ibs 70 21 9 146 41 5 WATER COOLED CONDENSER 384 121 193 55 gal 24HR gal 100 Ibs ICE PRODUCTION PER CYCLE 8 6 Ibs 3 9 kg 360 pcs BIN CONTROL SYSTEM Thermostat or Mechanical Bin Control REFRIGERANT CHARGE R 404A 1 Ib 0 8 oz 475g Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C 24 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 dau 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 5 800 BTU h AT 90 F 32 WT 70 F 219C TOTAL HEAT OF REJECTION FROM COMPRESSOR 1 000 BTU h AT 90 F 32 WT 70 F 219C WATER FLOW FOR CONDENSER 38 5 gal h AT 100 F 38 C WT 90 F 32 C PRESSURE DROP OF COOLING WATER LINE less than 10 PSIG 60 3 515 Specification Sheet AC SUPPLY VOLTAGE 115 60 1 AMPERAGE 11 7 A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC amp WATER CONSUMPTION 90 70 F 70 50 ELECTRIC W KWH 100 lbs 1110 5 9 1010 4 6 WATER gal 24HR gal 1
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51. ARD Ensure all components fasteners and thumbscrews are securely in place after the icemaker is serviced Make sure that none have fallen into the dispenser unit ice storage bin Make sure all food zones in the icemaker and dispenser unit ice storage bin are clean after service A Refrigeration Circuit Service Information WARNING Repairs requiring the refrigeration circuit to be opened must be performed by properly trained and EPA certified service personnel 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 NOTICE Always recover the refrigerant and store it in an approved container Do not discharge the refrigerant into the atmosphere Do not leave the system open for longer than 15 min when replacing or servicing parts The Polyol Ester POE oils used in R 404A applications 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 dr
52. C CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR gal day m3 day FREEZING CYCLE TIME min HARVEST CYCLE TIME min HEAD PRESSURE PSIG kg cm2G SUCTION PRESSURE PSIG kg cm2G TOTAL HEAT OF REJECTION FROM CONDENSER TOTAL HEAT OF REJECTION FROM COMPRESSOR WATER FLOW FOR CONDENSER PRESSURE DROP OF COOLING WATER LINE 208 230 60 1 3 wire with neutral or 208 230 60 1 8 7A 5 Min Freeze AT 104 F WT 80 F 15A 15A 90 70 F 70 50 F 1610 4 5 1610 4 2 180 20 8 239 25 8 1106 128 610 66 13 4 Ibs 6 1 kg 720pcs Thermostat or Mechanical Bin Control R404A 1 Ib 10 5 oz 750g AMBIENT TEMP F C 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 WATER TEMP F C 50 10 70 21 90 32 10 100 BTU h AT 90 F 32 C WT 70 F 219 1 700 BTU h AT 90 F 32 C WT 70 F 21 C 94 gal h AT 100 F 38 C WT 90 F 32 C less than 10 PSIG 69 12 KM 901MRH with URC 9F Specification Sheet AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 lbs WATER gal 24HR gal 100 Ibs ICE PRODUCTION PER CYCLE BIN CONTROL SYSTEM TOTAL REFRIGERANT CHARGE REFRIGERANT CHARGE BY UNIT Performance Data APPROXIMATE ICE PRODUCTION PER 24 HR
53. Circuit Check Valve 11 2 Water Cooled Models MWH Water Regulating Valve Condenser 7 gt Spray Tubes Inlet Water Valve BI miri ii Evaporator Water Supply Liquid Line Valve KM 320MWH and KM 515MWH Heat Thermistor Exchanger High Pressure Switch oo ee Strainer Hot Gas Valve Discharge Line Compressor Thermostatic Expansion Valve Refrigeration Circuit Water Circuit Check Valve 3 Remote Models MRH 3 Condenser Headmaster C P R Spray Tubes Inlet Water Valve Water Supply len Receiver High Pressure Switch Strainer Liquid Line Evaporator Valve Heat Thermistor Exchanger L Hot Gas Valve Cleaning Valve GE e Discharge Line Compressor Thermostatic Expansion Refrigeration Circuit Check Valve Water Circuit 13 lagnosis ll Sequence of Operation and Service D A Sequence of Operation Flow Chart 1 E and Control Board without Harvest Pump Timer Operation uonisod 991 ul peoeld 51 uos 19 UI AM UBYM yes JOU Burzniues pue out 9501 e
54. E 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 cm2G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm2G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 20 800 BTU h AT 90 F 32 WT 70 F 21 TOTAL HEAT OF REJECTION FROM COMPRESSOR 3 000 BTU h AT 909 32 WT 709 21 CONDENSER VOLUME 134 CU IN URC 14F 74 17a KM 1601MRH with URC 21F Specification Sheet AC SUPPLY VOLTAGE 208 230 60 1 3 wire with neutral AMPERAGE 11 6 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC amp WATER CONSUMPTION 90 70 70 50 F ELECTRIC W kWH 100 Ibs 2670 4 5 2450 3 9 WATER gal 24HR gal 100 Ibs 263 18 5 483 32 0 ICE PRODUCTION PER CYCLE 29 8 Ibs 13 5 kg 1440 pcs BIN CONTROL SYSTEM Thermostat TOTAL REFRIGERANT CHARGE R 404A 24 Ib 4 0 oz 11 0009 REFRIGERANT CHARGE by UNIT Icemaker 14 1 5 8 8 oz Cond Unit 9 Ib 11 2 oz Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C 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 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
55. F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 3 200 BTU h AT 90 F 32 WT 70 F 21 CONDENSER VOLUME 214 CU IN URC 22F 76 18a KM 1601MRH3 with URC 21F Specification Sheet AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE ELECTRIC W KWH 100 Ibs WATER 24 gal 100 Ibs ICE PRODUCTION PER CYCLE 208 230 60 3 8 4 A 5 Min Freeze AT 104 F WT 80 F 20A 20A ELECTRIC amp WATER CONSUMPTION 90 70 F 70 50 2640 4 6 2410 3 9 267 19 2 491 33 4 28 0 Ibs 12 7 kg 1440 pcs Thermostat BIN CONTROL SYSTEM TOTAL REFRIGERANT CHARGE R 404A 2416 4 0 oz 11 0009 Icemaker 14 Ibs 8 8 oz Cond Unit 9 Ib 11 2 oz REFRIGERANT CHARGE by UNIT Performance Data APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR gal day m3 day FREEZING CYCLE TIME min HARVEST CYCLE TIME min HEAD PRESSURE PSIG kg cm2G SUCTION PRESSURE PSIG kg cm2G TOTAL HEAT OF REJECTION FROM CONDENSER AMBIENT TEMP WATER TEMP FC 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 24 900 BTU h AT 90 F 32 C WT 70 F 219 TOTAL HEAT OF REJECTION FROM COMPRESSOR CONDENSER VOLUME 3 200 BTU h AT 90 F 32 C WT 70
56. Hoshizaki America Inc Modular Crescent Cuber Models KM 320MAH MWH 515 600 650 90 MRH 3 KM 1340MAH 160 MRH 3 SERVICE MANUAL A Superior Degree of Reliability www hoshizaki com Number 73196 Issued 4 29 2013 Revised 9 22 2014 WARNING Only qualified service technicians should install and service the appliance obtain the name and phone number of your local Hoshizaki Certified Service Representative visit www hoshizaki com No service should be undertaken until the technician has thoroughly read this Service Manual Failure to service and maintain the appliance in accordance with this manual will adversely affect safety performance component life and warranty coverage Proper installation is the responsibility of the installer Product failure or property damage due to improper installation is not covered under warranty Hoshizaki provides this manual primarily to assist qualified service technicians in the service of the appliance Should the reader have any questions or concerns which have not been satisfactorily addressed please call send an e mail message or write to the Hoshizaki Technical Support Department for assistance Phone 1 800 233 1940 770 487 2331 Fax 1 800 843 1056 770 487 3360 E mail techsupport hoshizaki com HOSHIZAKI AMERICA INC
57. OULNOD NIE 1081 40 4 81 1118 1 3 Jal zl gt L ALVI 30 DNO 2113 _ 1 1 1d TI HI Mu 83 f KM 1340MRH 22222 umno _ ALT HM PASE 440 440 440 440 130 ER dar DENNEN NS 111395 Hol 3A PE 4301330 430 43 33 430 440 ane ABT Te 73 d 1 11135 Hol ide B YOR TOHLN 1 WS p 1 e gap lt dad t 12 AS OL 1ndino m D Gi Ge Zi n EET JU 7 Zei aum 29 CS B Di i y TRNIH L Tu Zeen opal tee Ai al e e Gg i 11 SL Ej rk T 1 el E a Em 9 y
58. 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 NOTICE To prevent compressor damage use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low side refrigerant access valve with the icemaker running 9 Close the high and low side gauge manifold valves then disconnect the gauge manifold hoses 10 Cap the refrigerant access valves to prevent a possible leak 53 B Component Service Information NOTICE When replacing a component listed below see the notes to help ensure proper operation Component 2 Compressor 1 phase Install a new start capacitor run capacitor and start relay 3 phase Install a new magnetic contactor Thermostatic Attach the thermostatic expansion valve bulb to the suction line in the same location as Expansion Valves the previous bulb The bulb should be between the 10 and 2 o clock positions on the tube Secure the bulb with the clamp and holder then insulate it Hot Gas Valves Replace the strainer if
59. TICE Factory set for proper operation Do not adjust Adjustment outside of the factory default setting may result in damage to the appliance Depending on the harvest pump timer setting the pump motor either stays off or is energized the last 50 seconds of harvest When the pump motor is energized water circulates over the evaporator The harvest 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 and harvest begins X11 and X10 relays energize A latching circuit is created through the X11 and X10 relays For further details see VIII C Wiring Diagrams 50 sec before harvest termination LED 4 turns off inlet water valve and X11 relay de energize X10 relay remains energized through the latching circuit Next LED 3 turns on and control board K1 connector pin 5 DBU wire energizes energizing the pump motor for the last 50 sec of harvest G Control Board 54 Dip Switch Setting Pump Motor Time sec or 6 Factory Use S4 dip switch 8 Factory set for proper operation Do not adjust This must be left in the factory default position 7 Freeze Timer S4 dip switch 9 amp 10 NOTICE Adjust to proper specification or the icemaker may not operate correctly The freeze timer setting determines the maximum allowed freeze time to prevent poss
60. TRIC 70 21 CONSUMPTION 80 27 90 32 watts 100 38 APPROXIMATE WATER 70 21 CONSUMPTION PER 24 HR 80 27 90 32 gal day 3 100 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 cm2G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm2G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 8 500 BTU h AT 90 F 32 C WT 70 F 21 TOTAL HEAT OF REJECTION FROM COMPRESSOR 1 400 BTU h AT 90 F 32 WT 70 F 21 CONDENSER VOLUME 43 CU IN URC 5F 63 6 KM 600MAH Specification Sheet AC SUPPLY VOLTAGE AMPERAGE 12 0 A 5 Min Freeze 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 15A MAXIMUM FUSE SIZE 15A ELECTRIC amp WATER CONSUMPTION 90 70 70 50 ELECTRIC W kWH 100 lbs 1190 5 7 1040 4 2 WATER gal 24HR gal 100 Ibs 99 19 7 259 43 7 ICE PRODUCTION PER CYCLE BIN CONTROL SYSTEM Thermostat or Mechanical Bin Control REFRIGERANT CHARGE Performance Data APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR gal day m3 day FREEZING CYCLE TIME min HARVEST CYCLE TIME min HEAD PRESSURE PSIG _ kg cm2G SUCTION PRESSURE PSIG _ kg cm2G TOTAL HEAT OF REJECTION FROM CONDENSER 115 120 60 1 14 3 Ibs 6 5 720 pcs R 404A 11b 1102 7659 AMBIENT TEMP WATER TEMP F C
61. al W If 115VAC is present on terminal 6 DBU and not on terminal 4 replace X10 relay If 115VAC is present on X10 relay terminal 4 R check control switch contact continuity between terminals 4 R and 5 R If contacts are open replace control switch If contacts are closed and 115VAC is present between control switch terminal 5 R and neutral W check PM capacitor and motor winding continuity 5c Initial Harvest Cycle Termination Diagnosis When the thermistor reaches 48 F 9 CB reads 3 9 from the thermistor and turns harvest termination over to the harvest timer S4 dip switch 1 amp 2 Check discharge line temperature For a thermistor check see Thermistor Check If 1 min fill cycle starts after harvest timer terminates check that FS is clean and operating properly see Float Switch Check and Cleaning If FS is closed CB proceeds to the next cycle If not replace CB Note The minimum total time allowed by CB for a complete harvest cycle is 2 min Maximum harvest time allowed is 20 min NOTICE S4 dip switch 7 must remain on Otherwise PM will not energize during the last 50 sec of harvest 26 6 Freeze Cycle LED 1 is on Comp FMR and PM continue FM and LLV energize HGV and X10 relay de energize Appliance is held in freeze by a 5 min short cycle protection timer After 5 min timer terminates and FS opens freeze cycle terminates Note PM power supply switches from CB K1
62. and Performance Data Sheets Pressure data is recorded at 5 min into freezing cycle The data not in bold should be used for reference only 1 KM 320MAH Specifications AC SUPPLY VOLTAGE 115 60 1 AMPERAGE 9 7 A 5 Min Freeze 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC 8 WATER CONSUMPTION 90 70 70 50 ELECTRIC W kWH 100 lbs 770 7 5 730 5 6 WATER gal 24HR gal 100 Ibs 77 31 2 117 35 9 ICE PRODUCTION PER CYCLE 7 2 105 3 3 kg 360 pcs BIN CONTROL SYSTEM Thermostat or Mechanical Bin Control REFRIGERANT CHARGE 404 1 Ib 4 3 5750 Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP FC 9 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 32 100 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 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 6 700 BTU h AT 90 F 32 WT 70 F 21 C 59 2 KM 320MWH Specification Sheet AC SUPPLY VOLTAGE 115 60 1 AMPERAGE 8 2 A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC 8 WATER CONSUMPTION 90 70
63. anual See VIII B Performance Data i Short Freeze Cycle Diagnosis Confirm water tank fills and overflows during 1 min fill and harvest cycles If not check water supply filters shut off valve WV screen If water tank empties before 5 min timer terminates and freeze cycle is short check that CV is not leaking by water flowing down the potable drain If CV is leaking by remove and clean CV replace rubber seat and spring if necessary If water tank is full see Float Switch Check and Cleaning for erratic operating FS 7 Pump Out Cycle LEDs 1 3 and 2 are on 10 20 second pump out Timing of the first pump out is determined by S4 dip switch 5 amp 6 See the table below G Control Board Settings 4 Dip Switch Setting Pump Out 5 Frequency G Control Board After 2nd freeze cycle After 3rd freeze cycle After 6th freeze cycle After 11th freeze cycle Comp and FMR continue HGV energizes If S4 dip switch 3 amp 4 are set to 3 off and 4 on LED 4 turns on and WV and X11 relay energize energizing X10 relay NOTICE S4 dip switch 3 amp 4 must not be set to 3 off and 4 on Otherwise PM will rotate in freeze cycle direction instead of pump out direction FM and LLV de energize PM stops for 2 sec then reverses for 10 20 sec depending on pump out timer 54 dip switch 3 amp 4 setting When the pump out timer terminates pump out 28 is complete The pump out frequency control S4 dip switch
64. applicable dign Line Use copper tube of the same diameter and length when replacing valve lines alves Install a new capacitor Pump Motor Install a new capacitor 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 C Water Regulating Valve Adjustment water cooled model The water regulating valve is factory set and generally no adjustment is required However when necessary adjust the water regulator using the following procedure 1 Prepare a thermometer to check the condenser drain temperature Attach a pressure gauge to the high side line of the system Adjustment Screw 2 5 min after a freeze cycle starts confirm that the thermometer reads 104 F to 115 F 40 to 46 C If it does not rotate the 4 CW Higher adjustment screw by using a flat blade gt CCW Lower screwdriver until the temperature is in the proper range See Fig 5 Next check that Lp the reference pressure is in the
65. arvest Pump Timer Relays 22 82 225725 umno 2786 a KM 320M H KM 515M H KM 600MAH HUE 1 2217 TIJA po 13101A 44 duo Al dd DOKTERE HT YOUMS 9JnSS8Jg UDIH x 4 11135 HILIMS dl 3 ddi ddi dd ddi 84 Jd Jd HV 43 34 dd ddi dd dd H 3018 Way q HT 78 ig 11135 1 7 H 2 30 1 3 H 3 Wo NIN atas HOLL IH 1 Ji E H _ TI y JE T de E vc 4 Be B IL GD Lem Y 1001 Ja E TL ech ACL ell Eq pns re alan rn Tel LINI l vrl e uem au i va 30 73 GEN d Jey 1 33 c ER 1311 1 gt NS YOH E en wn we Excmo Tel Y NOD N LINO 0808 DI 508531 i giai DEE 108102 357 79 b KM 650MAH V 1 and earlier KM 650MWH V 1 and ear
66. cification Sheet AC SUPPLY VOLTAGE 208 230 60 1 3 wire with neutral or 208 230 60 1 AMPERAGE 7 4 A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 15A MAXIMUM FUSE SIZE 15A ELECTRIC amp WATER CONSUMPTION 90 70 70 50 F ELECTRIC W kWH 100 Ibs 1320 5 6 1220 4 6 WATER gal 24HR gal 100 Ibs 93 16 5 267 42 2 ICE PRODUCTION PER CYCLE 14 4 Ibs 6 5 kg 720 pcs BIN CONTROL SYSTEM Thermostat or Mechanical Bin Control TOTAL REFRIGERANT CHARGE 404 5 Ibs 14 9 2690 REFRIGERANT CHARGE BY UNIT Icemaker 4 Ibs 0 9 oz Cond Unit 1 Ib 14 oz Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C PER 24 HR 50 10 70 21 90 32 70 21 80 27 90 32 Ibs 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 3 100 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 cm2G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm2G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 9600 BTU h AT 90 F 32 WT 70 F 21 TOTAL HEAT OF REJECTION FROM COMPRESSOR 1500 BTU h AT 90 F 3290 WT 70 21 C CONDENSER VOLUME 40 CU IN URC 5F 67 10 901 Specification Sheet AC SUPPLY VOLTAGE 208 230 60 1 3 wire with neutral or 208 230 60
67. d i VEH Dir DEI 91
68. d not on 22 P replace control switch If 115 VAC is present on control switch 2 P check for 115VAC at HPS P to neutral W then HPS BK to neutral W If 115VAC is present at HPS P and not at HPS BK HPS is open See HPS Diagnosis below If 115VAC is present at HPS BK check for 10 5VAC at CB 2 1 red wire to CB 2 2 red wire If 10 5VAC is not present check that the cleaning valve is closed and the interlock switch is closed Next check CT continuity If open replace CT b HPS Diagnosis Check that the condenser coil is not clogged or restricted Let refrigeration circuit pressures equalize If HPS does not reset and pressures are equalized replace HPS If pressures are not equalized reclaim refrigerant and diagnose refrigeration circuit restriction Check that there are no restrictions in the refrigeration circuit Harvest Cycle HGV strainer or check valve Freeze Cycle FM FMR TXV HM LLV strainer check valve drier and damaged line set or fitting Also confirm WRV opens in freeze cycle Confirm that the location meets installation requirements The icemaker is not intended for outdoor use Normal operating ambient temperature should be within 45 F to 100 F 7 C to 38 C Allow 6 15 cm clearance at rear sides and top for proper air circulation and ease of maintenance and or service should they be required The appliance should not be located in a corrosive environment 4 1 Minute Fill Cycle
69. e to CB K2 2 red wire If 10 5VAC is not present check that the cleaning valve is closed and the interlock switch is closed Next check CT continuity If open replace CT b HPS Diagnosis Check that the condenser coil is not clogged or restricted Let refrigeration circuit pressures equalize If HPS does not reset and pressures are equalized replace HPS If pressures are not equalized reclaim refrigerant and diagnose refrigeration circuit restriction Check that there are no restrictions in the refrigeration circuit Harvest Cycle HGV strainer or check valve Freeze Cycle FM FMR TXV WRV HM LLV strainer check valve drier and damaged line set or fitting Confirm that the location meets installation requirements The appliance is not intended for outdoor use Normal operating ambient temperature should be within 45 F to 100 F 7 C to 38 Allow 6 15 cm clearance at rear sides and top for proper air circulation and ease of maintenance and or service should they be required The appliance should not be located in a corrosive environment 24 4 1 Min Fill Cycle LED 4 is on WV and X11 relay energize After 1 min CB checks for a closed FS If FS is closed the harvest cycle begins If harvest cycle begins Comp HGV FMR energized continue to step 5a If FS is open WV remains energized through additional 1 min fill cycles until water enters the water tank and FS closes low water safety protection dur
70. e up Fill out a freeze up checklist See the Hoshizaki America Technician s Pocket Guide or contact your local distributor for a copy of the freeze up checklist Freeze Up Possible Cause Harvest Cycle 1 Evaporator a Scaled up b Damaged 2 Cube Guides a Out of position b Damaged 3 Spray Tubes and or Spray a Dirty Guides b Out of position Pu SD b External water filters clogged C Insufficient water line size Minimum 1 4 Nominal ID 6 mm Nominal OD in the EU copper water tubing or equivalent 5 Inlet Water Valve 8 Screen or orifice clogged b Defective 6 Float Switch 8 Dirty sticking See Float Switch Check b Defective and Cleaning 7 Refrigerant Charge Low 8 Control Board a Harvest timer S4 dip switch 1 amp 2 set too short See III C Settings and b Harvest pump timer S4 dip switch 7 not in factory default position Adjustments and Control G control board eelere 38 Freeze Up Possible Cause 9 Bin Control Actuator does not move freely See Bin Control Check 10 Thermistor a Loose disconnected or defective See Thermistor Check a ive a i 11 Thermostatic Expansion Valve 12 Hot Gas Valve 18 Liquid Line Valve 1 Evaporator 2 Spray Tubes and or Spray Guides Refrigerant Charge See II C Control Board Check b Defective 5 Inlet Water Valve 8 Leaking by 6 Float Switch Float d
71. eck that appliance has not shut off on HPS POWER OK LED off If so check 3 b HPS Diagnosis above If POWER LED is on check for 115VAC at CB K1 1 V or 9 V to neutral W If 115VAC is not present and LED 1 is on replace CB If 115VAC is present check for 115VAC at CR or MC coil If 115VAC is present check CR or MC coil and contact continuity Replace as needed If CR or MC is ok check Comp external overload start relay and start and run capacitors Next check Comp motor winding continuity If Comp is energized but evaporator is not cooling check for an inefficient Comp See VIII B Performance Data If Comp is energized but FMR is not check for 115VAC at the FMR junction box If 115VAC is not present check icemaker wiring connections If 115VAC is present check for voltage at condenser unit If 115VAC is not present check field wiring connections If 115VAC is present check FMR capacitor motor winding and fan blade for binding c WV and Diagnosis If WV is energized check for 115VAC at CB K1 6 to neutral W If 115VAC is present after PM energizes replace CB If 115VAC is not present replace WV bypassing If HGV did not de energize check for 115VAC at CB K1 2 P to neutral W If 115VAC is present after PM energizes replace CB If 115VAC is not present replace HGV bypassing 20 d PM Diagnosis Confirm water is flowing over evaporator from PM and not WV If PM de energizes once freeze b
72. ed area with a floor drain Install the appliance in a location that stays above freezing Normal operating ambient temperature must be within 45 F to 100 F 7 C to 38 C Do not leave the icemaker on during extended periods of non use extended absences or in sub freezing temperatures To properly prepare the icemaker for these occasions follow the instructions in VI Preparing the Appliance for Periods of Non Use Do not place objects on top of the appliance The dispenser unit ice storage bin is for ice use only Do not store anything else in the dispenser unit ice storage bin I Construction and Water Refrigeration Circuit Diagram A Construction 1 Air Cooled Models MAH Thermostatic Expansion Valve Spray Tubes Supply Inlet Inlet Water Valve Hot Gas Valve Thermostatic Bin Control Condenser Cleaning Valve Fan Motor Control Switch High Pressure Switch Drier Float Switch Liquid Line Valve KM 515MAH Water Pump P 2 Compressor Mechanical Bin Control and Bracket Thermostatic Bin Control Bracket amp Bulb Holder Model Shown KM 515MAH 2 Water Cooled Models MWH Thermostatic Expansion Valve Water Supply Inlet Spray Tubes Hot Gas Valve Inlet Wate
73. ee VIII B Performance Data If refrigerant pressures are correct and WRV does not open adjust or replace as needed See IV C Water Regulating Valve Adjustment water cooled models h Freeze Termination Diagnosis After 5 min in freeze disconnect CB K5 FS connector 15 sec later appliance should switch out of the freeze cycle 15 second delay after FS opens before terminating the freeze cycle If appliance remains in freeze longer than 15 sec after FS removed replace CB If appliance switches with FS removed but would previously not switch out of freeze with FS connected long freeze beep alarm see Float Switch Check and Cleaning Note Normal freeze cycle will last 20 to 40 min depending on model and conditions Cycle times and pressures should follow performance data provided in this manual See VIII B Performance Data i Short Freeze Cycle Diagnosis Confirm water tank fills and overflows during 1 min fill and harvest cycles If not check water supply filters shut off valve WV screen If water tank empties before 5 min timer terminates and freeze cycle is short check that CV is not leaking by water flowing down the potable drain If CV is leaking by remove and clean CV replace rubber seat and spring if necessary If water tank is full see Float Switch Check and Cleaning for erratic operating FS 21 7 Pump Out Cycle LEDs 1 3 and 2 are 10 20 second Timing of the
74. egins check for 115VAC at CB K1 4 R to neutral W If 115VAC is not present replace CB If 115VAC is present and PM is de energized check for 115VAC at control switch 5 to neutral W If 115VAC is present at CB K1 4 and not at control switch 5 check control switch continuity between 5 and 4 Replace as needed If 115VAC is present at control switch 5 to neutral W check PM capacitor and motor winding continuity e FM and LLV Diagnosis If FM or LLV does not energize check for 115VAC at CB K1 3 BK to neutral If 115VAC is not present replace CB If 115VAC is present For FM check capacitor motor winding and blade for binding For LLV check coil voltage and continuity f Refrigerant Pressures HM and TXV Diagnosis If evaporator is still not cooling check refrigerant pressures See VIII B Performance Data Next check HM operation If refrigeration pressures are above HM setpoint and HM is bypassing replace HM Check TXV for proper operation Remove TXV bulb and hold it in your hand refrigerant low side pressure should rise place TXV bulb in ice water refrigerant low side pressure should drop A 10 to 15 pound pressure swing between warm and cold conditions indicate a good TXV If a 10 to 15 pound swing is not present replace TXV 9 WRV Diagnosis WRV is factory set and generally no adjustment is required If WRV fails to open in freeze check for proper refrigerant pressures S
75. elector or Harvest Pump Timer Operation S4 dip switch 7 48 Factory Use 54 dip switch enne nina nio rio niai acis ck ng Rx ew FR KI 49 7 Freeze Timer S4 dip switch 9 amp 10 49 8 Float Switch Selector 55 dip switch 1 Control Board 50 9 Refill Counter S5 dip switch 2 through 5 Control Board 50 IR ier ei ee EE 50 IV Refrigeration Circuit and Component Service 51 A Refrigeration Circuit Service Information 51 B Component Service 54 C Water Regulating Valve Adjustment water cooled 54 o e 55 Preparing the Appliance for Periods of 56 UNE lt crt EE 58 Technical Infor beleet dees beneiden HER to aam nop eei 59 A Specification and Performance Data 59 IM KM 320MA TERR 59 60 3 KM515MAH 61 4 drugs NER RTL TT 62 5 515 with URC 5F 63 SM
76. erage and may result in costly water damage To reduce the risk of death electric shock serious injury or fire follow basic precautions including the following Only qualified service technicians should install and service this appliance The appliance must be installed in accordance with applicable national state and local codes and regulations 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 icemaker requires an independent power supply of proper capacity See the nameplate for electrical specifications Failure to use an independent power supply of proper capacity can result in a tripped breaker blown fuses damage to existing wiring or component failure This could lead to heat generation or fire THE ICEMAKER MUST BE GROUNDED Failure to properly ground the icemaker could result in death or serious injury Move the control switch to the OFF position and turn off the power supply before servicing Lockout Tagout to prevent the power supply from being turned back on inadvertently To reduce the risk of electric shock do not touch the control switch with damp hands Do not make any alterations to the unit Alterations could result in electric shock injury fire or damage to the unit The appliance i
77. eutral W wire If output voltage is not found and the appropriate LED is on replace CB Legend CB control board CT control transformer 30 D Bin Control Check 1 Thermostatic Bin Control Check TBC shuts down the icemaker within 10 sec when ice contacts the thermostatic bulb regardless of the cycle at activation NOTICE When the ambient temperature is below 45 F 7 C TBC opens and shuts down the appliance even if the ice storage bin is empty When BC is set in the prohibited range the appliance operates continuously even if the ice storage bin is filled with ice Setting in the prohibited range may result in severe damage to the appliance TBC is factory set and generally no adjustment is required However adjustment may be needed in some conditions particularly at higher altitude locations Note On control boards a jumper 4A4883G01 must placed CB red K4 connector Otherwise CB yellow BC OPEN LED is on and appliance will not start To check TBC follow the steps below 1 2 3 4 5 6 Turn off the power supply Remove the front panel then move the control switch to the OFF position Remove the control box cover then clear any ice away from TBC bulb Disconnect TBC wires from TBC switch Hold your hand around the bulb to warm it up Check for continuity across TBC switch If closed continue to step 6 If open adjust or replace TBC 7 With the multimeter test leads still in p
78. f the harvest timer during cycles with a pump out S4 dip switch 5 amp 6 WV remains energized during harvest for a maximum of 6 min or the length of harvest whichever is shorter a Comp Diagnosis Check that evaporator is warming If not confirm that Comp energizes If not check for 115VAC at CB K1 1 or 9 V to neutral W If 115VAC is not present check for 115VAC at CB K1 7 10 BR to neutral W If 115VAC is present at 7 or 10 BR and not at 1 or 9 V replace CB If 115VAC is present check for 115VAC at CR or MC solenoid If 115VAC is present confirm contacts are closed If not replace CR or MC If CR or MC contacts are closed check Comp external overload Comp start and run capacitors Comp start relay and Comp motor winding b HGV Diagnosis If Comp is energized and evaporator is not warming check that HGV energizes and opens Check for 115VAC at CB K1 2 P to neutral W If 115VAC is not present replace CB If 115VAC is present check for 115VAC at HGV coil and check HGV coil continuity Replace as needed LLV Diagnosis Confirm that LLV is de energized and closed not bypassing If energized replace CB If de energized and bypassing replace LLV WRV Diagnosis Confirm WRV is not leaking by Initial Harvest Cycle Termination Diagnosis When the thermistor reaches 48 9 C CB reads 3 9 from the thermistor and turns harvest termination over to the harvest timer S4 dip switch 1
79. fter the water tank has drained reconnect the pump tubing b On KM 1340M H and KM 1601M H remove the rubber cap covering the overflow pipe in the water tank Remove the overflow pipe by turning it counterclockwise After the water tank has drained replace the overflow pipe and the rubber cap in their correct positions Note Be sure the overflow pipe o ring is in its correct position on the overflow pipe 4 Disconnect the vent tube and the flush tube from the top of FS then remove FS assembly and remove the rubber boot from the bottom of FS assembly See Fig 4 5 Remove the retainer rod from the bottom of FS housing then remove the float Be careful not to bend the retainer rod excessively when removing it 6 Wipe down FS 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 7 Reassemble FS assembly and replace it and the rubber boot in bei ompect positions Reconnect the vent tube and the flush tube 8 Move the control switch to the ICE position EIER US 9 Replace the base cover if applicable and front panel in their correct positions Shaft Float Switch 10 Turn on the power supply to start the Housing automatic icemaking process Legend CB control board FS float switch IL Float Rod
80. h is moved to the ICE position The red POWER OK 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 Sequence Ste LED Energized Time LEDs are On Components Max 1 Minute Fill Cycle 4 wv mme Harvest Cycle Freeze Cycle Comp FM FMR PM 5 minutes freeze timer 30 to 35 minutes LLV setting Pump Out Cycle Comp FMR HGV PM 10 seconds 20 seconds pump out timer WV setting The built in safeties shut down the icemaker and have alarms as listed below No of Beeps 1 High Evaporator Temp Check for harvest problem stuck HGV or relay hot temperature gt 127 F 53 water entering icemaker or shorted thermistor 2 Harvest Backup Timer Check for open thermistor HGV not opening TXV or harvest 20 min for two LLV leaking by low charge or inefficient Comp or WRV cycles in a row leaking by 3 Freeze Timer Check for FS stuck closed up WV leaking by HGV freeze gt freeze timer setting leaking by PM not pumping not feeding properly for two cycles in a row LLV not opening low charge HM not bypassing or inefficient Comp To reset the above safeties press the ALARM RESET button with the power supply Low Voltage Red LED turns off if v
81. heet AC SUPPLY VOLTAGE 208 230 60 1 3 wire with neutral or 208 230 60 1 AMPERAGE 5 4 A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 15A MAXIMUM FUSE SIZE 15A ELECTRIC amp WATER CONSUMPTION 90 70 70 50 F ELECTRIC W kWH 100 Ibs 1130 4 16 1120 4 03 WATER gal 24HR gal 100 Ibs 145 22 3 286 42 7 WATER COOLED CONDENSER 982 151 503 75 gal 24HR gal 100 Ibs ICE PRODUCTION PER CYCLE 14 3 Ibs 6 5 kg 720 pcs BIN CONTROL SYSTEM Thermostat or Mechanical Bin Control REFRIGERANT CHARGE R 404A 1 Ib 5 2 oz 600g Performance Data APPROXIMATE ICE PRODUCTION AMBIENT TEMP WATER TEMP F C PER 24 HR 70 21 669 663 626 80 27 665 656 602 90 32 663 650 602 lbs day kg day 100 38 646 639 557 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 cm2G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm2G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 9 200 BTU h AT 90 F 32 WT 70 F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 1 400 BTU h AT 90 F 32 WT 70 F 21 C WATER FLOW FOR CONDENSER 99 6 gal h AT 100 F 38 WT 90 F 329 PRESSURE DROP OF COOLING WATER LINE less than 10 PSIG 66 9 KM 650MRH with URC 5F Spe
82. hen 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 404 1 Attach a vacuum pump to the system Be sure to connect the charging hoses to both high and low side refrigerant 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 Open the gauge manifold 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 4 Close the low side valve and high side valve on the gauge manifold 52 5 Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder Remember to loosen the connection and purge the air from the hose For the required refrigerant charge see the rating label inside the icemaker Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI
83. ible freeze up issues Upon termination of the freeze timer the control board initiates the harvest cycle or pump out cycle After 2 consecutive freeze timer terminations the control board shuts down the icemaker In this case see II G 3 Low Ice Production for possible solutions The freeze timer is factory set and no adjustment is required Before changing this setting contact Hoshizaki Technical Support at 1 800 233 1940 for recommendations 8 Float Switch Selector S5 dip switch 1 Control Board NOTICE Do not adjust This must be left in the factory default position or the icemaker will not operate correctly 9 Refill Counter S5 dip switch 2 through 5 G Control Board NOTICE Do not adjust These must be left in the factory default position or the icemaker will not operate correctly D Control Switch The control switch has three positions OFF for power off ICE for icemaking and WASH to energize the pump motor when cleaning and sanitizing 50 IV Refrigeration Circuit and Component Service Information WARNING This appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire Move the control switch to the OFF position and turn off the power supply Place the disconnect in the OFF position Lockout Tagout to prevent the power supply from being turned back on inadvertently CHOKING HAZ
84. ier 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 icemaker is provided with refrigerant access valves Using proper refrigerant practices recover the refrigerant Store the refrigerant in an approved container Do not discharge the refrigerant into the atmosphere 51 2 Brazing WARNING 404 itself is not flammable at atmospheric pressure and temperatures up to 176 80 404 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 Do not use silver alloy or copper alloy containing arsenic 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 itis important to make connections outside the evaporator case when possible If itis necessary to braze inside the evaporator case use sandpaper to remove the coating from the brazing connections before unbrazing the components NOTICE 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 W
85. ing initial start up and at the end of each harvest Diagnosis Check that water enters the water tank If not check that the water supply line shut off valve is open and screens or external filters are clear Check for 115VAC at CB K1 6 to neutral W If 115VAC is not present replace CB If 115VAC is present and WV does not energize check for 115VAC at WV If 115VAC is present check coil continuity If open replace WV If the water tank fills but the appliance fails to start harvest Comp energized check for open FS See Float Switch Check and Cleaning If FS is closed and CB fails to start the harvest cycle after 1 min replace CB 5a Initial Harvest Cycle LEDs 1 4 and 2 are on WV and X11 relay continue Comp FMR HGV and X10 relay 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 3 9 kO 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 180 sec The pump out timer S4 dip switch 3 amp 4 acts in place of the harvest timer during cycles with a pump out S4 dip switch 5 amp 6 WV and X11 relay are energized during harvest for a maximum of 6 min or the length of harvest minus 50 sec whichever is shorter 50 sec before harvest terminates PM energizes See step 5b below a Comp Diagnosis Check that evaporator
86. iring connections If 115VAC is present check FMR capacitor motor winding and fan blade for binding c WV and HGV Diagnosis If WV is energized check for 115VAC at CB K1 6 to neutral W If 115VAC is present after PM energizes in harvest cycle replace CB If 115VAC is not present replace WV bypassing If HGV did not de energize at the end of harvest check for 115VAC at CB K1 2 P to neutral W If 115VAC is present 50 sec after PM energizes replace CB If 115VAC is not present replace HGV bypassing d PM Diagnosis Confirm water is flowing over evaporator from PM and not WV If PM de energizes once freeze begins check for 115VAC at CB K1 4 R to neutral W If 115VAC is not present replace CB If 115VAC is present and PM is de energized check for 115VAC at control switch 5 to neutral If 115VAC is present at CB K1 4 and not at control switch 5 check control switch continuity between 5 R and 4 R Replace as needed If 115VAC is present at control switch 5 R to neutral W check PM capacitor and motor winding continuity e FM and LLV Diagnosis If FM or LLV does not energize check for 115VAC at CB K1 3 BK to neutral W If 115VAC is not present replace CB If 115VAC is present For FM check capacitor motor winding and blade for binding For LLV check coil voltage and continuity 27 f Refrigerant Pressures HM and TXV Diagnosis evaporator is still not cooling check
87. jejd pinbiI ATT y pue episino Jeziiues pue uedo Burueej out ejejd 10U ADH JO episino eui Jezniues pue eui ojowu oi perjddns 51 YOUMS 10 54 uonisod HSVM 94 Ul ueuM ayewa eui pue ueuw pesn 51 y uo HSVM 941 uonisog HSVM 941 UI SI 1043405 out pezib4ou3 sjueuoduio5 uej 1N3 Josseidwoo dwiog 1xeu 295 lt pue AT es 02 01 10 AM IW utuJ L pue 5 15 dwog usdo 51 2 10 em Wd uodo YOUMS Baus ATI 6 AM dip YS WOZE IN pezibieue AM pos unu e 2 spes soneh 92 ADH uedo 54 4 ASH senuguoo dwog 2 Jo suedo 4 senunuoo senunuoo dwog UJ 6 8 0 6 saugen 2 HINA 2
88. lace hold ice on TBC bulb to lower the temperature Within 10 sec TBC switch should open If it remains closed adjust or replace TBC ef Legend TBC thermostatic bin control 31 2 Mechanical Bin Control Check and Cleaning a Mechanical Bin Control Check This appliance uses a lever actuated proximity switch to control the ice level in the storage bin No adjustment is required To check TBC follow the steps below 1 Turn off the power supply 2 Remove the front panel then move the control switch to the OFF position MBC Connector 3 Remove the control box cover then clear any ice away from to control MBC board K4 red 4 Check MBC wire harness connections See Fig 1 5 Disconnect connector from connector EE 6 Check for continuity across wires of MBC MBC connector When the actuator paddle MBC Wire is not engaged MBC switch is closed Harness white If open check that the wire harness Connector connector is properly connected and that Actuator the actuator paddle is not sticking Clean if Paddle necessary See II D 2 b Mechanical HM Fig 1 Control Cleaning If MBC switch still reads La open replace MBC Model Shown 901 7 Press and hold the actuator paddle check for continuity across the wires of MBC connector When the actuator paddle is engaged MBC switch is open If closed check that the actuator paddle is not
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90. maker water supply line drain valve 3 Allow the line to drain by gravity 4 Attach a compressed air or carbon dioxide supply to the icemaker water supply line drain valve 5 Make sure at least 3 min 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 then 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 2 Remove the water from the water tank 1 Turn off the power supply then remove the front panel 2 Move the control switch to the OFF position Disconnect This End of Pump 3 Drain the water tank Tubing to Drain On 320 H KM 515M H 600 650 901 H remove the base cover then disconnect one end of the pump tubing to drain the water tank See Fig 6 After the Base Cover water tank has drained reconnect the pump tubing b On KM 1340M H and KM 1601M H remove the rubber cap covering the overflow pipe in the water tank Remove the overflow pipe by turning it counterclockwise After the water tank has drained replace the overflow pipe and the rubber cap in their correct positions Note Be sure the overflow pipe o ring is in its correct position on the overflow pipe 4 Replace the base cover if applicable and front panel in their correct positio
91. mp motor TBC thermostatic bin control TXV thermostatic expansion valve WRV water regulating valve WV inlet water valve 23 2 G Control Board with Harvest Pump Timer Diagnosis 3 Power On Turn on the power supply then move the control switch to the ICE position A 5 sec delay occurs CB red POWER OK LED and green BC CLOSED LED turn on If yellow BC OPEN LED is on indicating a full bin check MBC Move ice away from MBC actuator paddle If yellow BC OPEN LED stays on see II D 2 Mechanical Bin Control MBC Check Note CB red POWER LED remains on unless the 10 5 VAC power supply is interrupted K2 connector Check CB using the steps Control Board Check Confirm CB green BC CLOSED LED is on If CB yellow BC OPEN LED is on remove ice from BC If no ice is around BC and yellow BC OPEN LED is on see 11 0 2 Mechanical Bin Control MBC Check a Power On Diagnosis If CB red POWER LED is off confirm 10A fuse is good Check for 115VAC at control switch 1 BR to neutral W then at control switch 2 P to neutral W If 115VAC is present on 1 BR and not on 2 P replace control switch If 115VAC is present on control switch 2 P check for 115VAC at HPS P to neutral W then HPS BK to neutral W If 115VAC is present at HPS P and not at HPS BK HPS is open See HPS Diagnosis below If 115VAC is present at HPS BK check for 10 5VAC at CB 2 1 red wir
92. ns 56 5 Remove all ice from the dispensing unit ice storage bin Clean the storage bin liner using a neutral cleaner Rinse thoroughly after cleaning 3 On water cooled model remove the water from the water cooled condenser 1 Make sure the power supply is off then remove the front panel and right side panel 2 Close the condenser water supply line shut off valve If connected to a closed loop system also close the condenser return line shut off valve 3 Open the condenser water supply line drain valve If connected to a closed loop system also open the condenser return line drain valve 4 Attach a compressed air or carbon dioxide supply to the condenser water supply line drain valve 5 Open the water regulating valve by using a screwdriver to pry up on the spring retainer underneath the spring While holding the valve open blow out the condenser using the compressed air or carbon dioxide supply until water stops coming out 6 Close the drain valve s 7 Replace the right side panel and front panel in their correct positions 57 VII Disposal The appliance contains refrigerant and must be disposed of in accordance with applicable national state and local codes and regulations Refrigerant must be recovered by properly certified service personnel 58 VIII Technical Information We reserve the right to make changes in specifications and design without prior notice A Specification
93. oes not move freely and Cleaning 7 Pump Motor Thermostatic Expansion Valve 9 Liquid Line Valve 10 Headmaster C P R Not bypassing remote models 3 Low Ice Production Low Ice Production Possible Cause Long Harvest Cycle 1 Evaporator a Scaled up 2 Spray Tubes and or Spray a Dirty Guides b Out of position 3 Refrigerant Charge EE b External water filters clogged C Insufficient water line size Minimum 1 4 Nominal ID 6 mm Nominal OD in the EU water tubing or equivalent d Too cold 5 Control Board Thermistor connection loose K3 See II C Control Board Check b Defective 6 Thermistor Loose disconnected or defective See Thermistor Check 7 Hot Gas Valve a Erratic or closed 39 4 Control Board Freeze timer S4 dip switch 9 amp 10 set incorrectly Screen or orifice clogged Inefficient or off a Defective 2 Float Switch Scaled up dirty See ILE Float Switch Check 6 Control Board See ILC Control Board Check 8 Thermostatic Expansion Valve _ 12 Headmaster C P R 8 Not bypassing remote models 40 Controls and Adjustments A Hoshizaki exclusive control board is employed in KM series appliances All models are pretested and factory adjusted e For a control board check procedure see Control Board Check NOTICE Fragile handle very carefully The
94. oltage protection operates 92 5 or less The control voltage safeties automatically reset when High Voltage voltage is corrected 147Vac 5 or more Legend Comp compressor FM fan motor FWR fan motor remote FS float switch HGV hot gas valve HM headmaster C P R LLV liquid line valve PM pump motor TXV thermostatic expansion valve WRV water regulating valve WV inlet water valve 45 C Settings and Adjustments NOTICE Dip switches are factory set Failure to maintain factory settings may adversely affect performance and warranty coverage For more information contact your Hoshizaki Service Center 1 Default Dip Switch Settings The dip switches are factory adjusted to the following positions for both the E and G control boards a E and G Control Board without Harvest Pump Timer Operation E Control Board S4 Dip Switch No 1 2 3 4 5 17 9 mamm JoFF oFF oN ON OFF OFF OFF OFF b Control Board with Harvest Pump Timer Operation S4DipSwitchNo 1 2 s 4 s s 7 8 9 OFF ON or OFF OFF ON 55 Dip Switch Do Not Adjust G Control Board SwitchNo 1 2 3 4 5 S4 Dip Switch 5 Dip Switch E and G Control Boards G Control Board Only Freeze Timer 9 amp 10 Do Not Adjust Factory Use 8 Bin Control Selector 7 E Control Board 3 Refill Counter Harvest P
95. r Valve we A High Pressure Switch 2 2 Water Regulating Thermostatic EE Valve Bin Control ces Adhd Condenser Cleaning Valve be mo E i 4 e Control Box i d X uA BTT s 2 2 Liquid Line Valve ding sei KM 320MWH and T WE KM 515MWH VE Water Pump ES Compressor Mechanical Bin Control and Bracket Thermostatic Bin Control Bracket amp Bulb Holder Model Shown KM 515MWH 3 Remote Models MRH 3 Thermostatic Expansion Valves Spray Tubes Water Supply Inlet Inlet Water Valve Cleaning Valve Junction Boxes Control Switch Control Box Thermostatic Bin Control Receiver Tank Float Switch Water Pump Drier Compressor Liquid Line Valve Mechanical Bin Control and Bracket Thermostatic Bin Control Bracket amp Bulb Holder Model Shown KM 901MRH 10 B Water Refrigeration Circuit Diagram 1 Air Cooled Models MAH Spray Tubes Condenser High Pressure Water Supply Switch Liquid Line Valve KM 515MAH Heat Thermistor Exchanger Strainer Hot Gas Valve Compressor Discharge Line Thermostatic Expansion Valve Refrigeration Circuit Water
96. range indicated in the Head Pressure table in the Performance Data section If it is not in the View Fig 5 E proper range verify the refrigerant charge 3 Check that the condenser drain temperature is stable 54 V Maintenance The maintenance schedule below is a guideline More frequent maintenance may be required depending on water quality the appliance s environment and local sanitation regulations WARNING Only qualified service technicians should service the appliance To reduce the risk of electric shock do not touch the control switch or service switch with damp hands Before servicing Move the control switch to the OFF position and turn off the power supply Place the disconnect in the OFF position Lockout Tagout to prevent the power supply from being turned back on inadvertently CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after any maintenance is done to the icemaker Make sure that none have fallen into the dispenser unit ice storage bin Maintenance Schedule Clean the ice scoop using a neutral cleaner Rinse thoroughly after cleaning Bi Weekly Air Filters Inspect Wash with warm water and neutral cleaner if dirty Monthly External Water Check for proper pressure and change if necessary Icemaker Exterior Wipe down with a clean soft cloth Use a damp cloth containing a
97. s not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety WARNING continued Children should be properly supervised around this appliance Do not climb stand or hang on the appliance or allow children or animals to do so Serious injury could occur or the appliance could be damaged Do not use combustible spray or place volatile or flammable substances near the appliance They might catch fire Keep the area around the appliance clean Dirt dust or insects in the appliance could cause harm to individuals or damage to the appliance Additional Warning for Remote Models THE REMOTE CONDENSER UNIT MUST BE GROUNDED The power supply and ground connection to the remote condenser unit are supplied from the icemaker Failure to properly ground the remote condenser unit could result in death or serious injury Move the icemaker control switch to the OFF position and turn off the power supply to the icemaker before servicing the remote condenser unit Lockout Tagout to prevent the power supply from being turned back on inadvertently NOTICE Follow the instructions in this manual carefully to reduce the risk of costly water damage In areas where water damage is a concern install in a contain
98. ssing replace LLV 9 WRV Diagnosis Confirm WRV is not leaking by 25 5b Harvest Pump Timer LEDs 1 3 and 2 are on When the thermistor reaches 48 F 9 C CB reads 3 9 kO from the thermistor and turns harvest termination over to the harvest timer 54 dip switch 1 amp 2 50 sec before the harvest timer terminates LED 3 turns on and PM energizes Comp FMR HGV and X10 relay continue LED 4 turns off WV and X11 relay de energize Diagnosis Place a thermometer on the suction line next to the thermistor Has it warmed to 48 F 9 C or warmer Confirm thermistor status See Thermistor Check If the thermistor reading is in proper range dip switch 7 is on and PM does not energize 50 sec before harvest terminates replace CB If WV continues check for 115VAC at CB K1 6 If 115VAC is present and LED 4 is off replace CB If LED 3 is on and PM is not energized check for 115VAC at CB K1 5 DBU If 115VAC is not present replace CB If 115VAC is present and PM is not energized check for 115VAC at X10 relay terminal 7 Y to neutral W If 115VAC is not present check for 115VAC at X10 relay terminal 3 P to neutral W and X10 relay terminal 5 Y to neutral W If 115VAC is present on terminal P and not on terminal 5 Y replace X10 relay If 115VAC is present on X10 relay terminal 7 Y and PM is not energized check for 115VAC at X10 relay terminal 4 R to neutral W and terminal 46 DBU to neutr
99. st pump timer and every cycle on KM 515M H without harvest pump timer 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 can be set to have a pump out occur every cycle or every 2 10 cycles Timing of the first pump out is dependent on the control board On E control boards the first pump out is after the first freeze cycle On G control boards the first pump out is dependent on S4 dip switch 5 amp 6 See the table below E amp Control Board fetPumpOu _______ 4 Dip Switch Settin ip g Pump Out E Control Board G Control Board D Was No 5 After 1st freeze cycle 5 Bin Control Selector or Harvest Pump Timer Operation S4 dip switch 7 Depending on the control board S4 dip switch 7 is used for either bin control selection or harvest pump timer operation 1 Bin Control Selector E Control Board NOTICE Do not adjust This dip switch must be left in the factory default position or the icemaker will not operate correctly When set to on position on an icemaker with a thermostatic bin control a 5 beep alarm sounds open circuit and the icemaker does not operate E Control Board S4 Dip Switch Setti ip Switch Setting Bin Control Mechanical requires resistor wire harness 48 2 Harvest Pump Timer Control Board NO
100. the power supply CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after the appliance is serviced Make sure that none have fallen into the dispenser unit ice storage bin Make sure all food zones in the appliance and dispenser unit ice storage bin are clean after service The diagnostic procedure is a sequence check that allows you to diagnose the electrical system and components Before proceeding check for correct installation proper voltage per nameplate and adequate water supply Check CB using the steps in Control Board Check Check dip switch settings to assure that S4 dip switch 3 4 7 8 9 10 and S5 dip switch 1 through 5 G CB 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 1 Default Dip Switch Settings Note e When checking high voltage 115VAC always choose a white W neutral wire to establish a good neutral connection On 208 230 60 1 models with main transformer and 208 230 60 3 models the appliance neutral W is provided through the main transformer To confirm a good neutral check for 60VAC from white W neutral to ground GND If 60VAC is present neutral is good If 60VAC is not present check 208 230VAC main power supply to main transformer If 208 230VAC is present check main transformer continuity When checking voltage from the CB K1
101. ult 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 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 replace CB If the secondary circuit does not have proper voltage check CT primary circuit Check for 115VAC at CB K1 connector pin 10 BR to neutral W for 115VAC Always choose a white W neutral wire to establish a good neutral connection when checking voltages For additional checks see II G 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 For the correct lighting sequence see the table below Note that the order of the LEDs from the outer edge of the control board is 1 4 3 2 Components e g compressor cycle during the test Control Correct LED Board Lighting Sequence Following the test the icemaker begins operation at the 1 minute fill cycle for both E and G control boards If the LEDs do not light as described above replace CB 4 To verify voltage output from CB to the components slide the CB K1 connector out far enough to allow multimeter lead contact With the icemaker in the cycle to be tested check output voltage from the corresponding pin on CB K1 connector to a n
102. ump Timer 7 G Control Board 2 through 5 Do Not Adjust Float Switch Pump Out Frequency Control 5 amp 6 Selector 1 Pump Out Timer 3 amp 4 Harvest Timer 1 amp 2 46 2 Harvest Timer 54 dip switch 1 4 2 The harvest timer starts counting when the thermistor reaches 48 F 9 C at the evaporator outlet and the control board reads 3 9 kO from the thermistor 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 the drain provided at harvest needs to be prolonged for extra cleaning Before changing this setting contact Hoshizaki Technical Support at 1 800 233 1940 for recommendations Keep in mind that setting the harvest timer to a longer setting decreases 24 hour production Note that 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 3 Pump Out Timer 54 dip switch 3 amp 4 Note On models with a pump out every cycle the harvest timer is only relevant during the initial harvest cycle since a pump out occurs every cycle thereafter 3 Pump Out Timer S4 dip switch 3 amp 4 NOTICE On KM 515M H models without harvest pump timer operation never adjust the pump out timer s harvest timer T2 for a time less than 150 sec Otherwise the icemaker will not perform properly On models with harvest pump timer do not adjust 3
103. vest Pump Timer Diagnosis 18 2 Control Board with Harvest Pump Timer Diagnosis 24 C Control Board mE UU ____ __ __ _ _ 30 D Bin Control E 31 1 Thermostatic Bin Control Check EE 31 2 Mechanical Bin Control Check and Cleaning 32 Float Switch Ghebk and Cleaning oae nii beu bietet epu 34 DN Float SET m 34 2 Float Switch Cleaning SS 35 Thermistor ue aiU RUD 36 e x n 37 AE 41 A Control Board EE 42 NP d MORTE 42 Control Board E 43 B LED Lights and Audible Alarm 5 44 1 oie EN mE 44 2 Or BOE E 45 C Settings and AJUSTES o cost epu uo Uo Mus begut 46 46 and Control Board without Harvest Pump Timer 46 Control Board with Harvest Pump Timer 46 2 Harvest Timer S4 dip switch 1 amp E 47 3 Pump Out Timer S4 dip switch 3 amp 4 47 4 Pump Out Frequency Control S4 dip switch 5 4 6 48 3 5 Bin Control S
104. y APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 gal day m3 day FREEZING CYCLE TIME min HARVEST CYCLE TIME min HEAD PRESSURE PSIG _ kg cm2G SUCTION PRESSURE PSIG _ kg cm2G TOTAL HEAT OF REJECTION FROM CONDENSER TOTAL HEAT OF REJECTION FROM COMPRESSOR CONDENSER VOLUME 208 230 60 3 7 0A 5 Min Freeze AT 104 F WT 80 F 20A 20A 90 70 70 50 1830 5 4 1670 4 5 147 18 0 254 28 2 14 2 6 4 kg 720pcs Thermostat or Mechanical Bin Control R404A 9 165 4 oz 42009 Icemaker 5 Ibs 5 oz Cond Unit Ibs 15 oz AMBIENT TEMP WATER TEMP 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 70 21 80 27 90 32 100 38 14 100 BTU h AT 90 F 32 WT 70 F 21 C 2 200 BTU h 90 F 32 WT 70 F 21 121 CU IN URC 9F 71 14 1340 Specification Sheet AC SUPPLY VOLTAGE 208 230 60 1 3 Wire with neutral AMPERAGE 9 7 A 5 Min Freeze AT 104 WT 80 F MINIMUM CIRCUIT AMPACITY 20A MAXIMUM FUSE SIZE 20A ELECTRIC amp WATER CONSUMPTION 90 70 70 50 ELECTRIC W KWH 100 lbs 2280 4 7 2100 3 8 WATER gal 24HR gal 100 Ibs 214 18 3 413 31 2 ICE PRODUCTION PER CYCLE 28 1 105 12 7 kg 1440 pcs BIN CONTROL SYSTEM Thermostat REFRIGERANT CHARGE R 404A 415 11 4 oz 21400

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