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Hoshizaki HOSHIZAKI KMD-900MAH User's Manual

1. Q H 56 V Removal and Replacement of Components 57 Service Tor Refrigerant LI BS zad 57 57 b Evacuation and Recharge R 404 A 57 2 BraZiN g NON COC 58 Removal and Replacement of 59 4 Removal and Replacement Of 61 5 Removal and Replacement of Expansion 61 6 Removal and Replacement of Hot Gas Valve and Line Valve 62 7 Removal and Replacement of 64 8 Removal and Replacement of Water Regulating Valve Water Cooled Model Only 65 9 Adjustment of Water Regulating Valve Water Cooled Model Only 66 10 Removal and Replacement of Condensing Pressure Regulator C P R Remote Air Cooled Model OMIY E 67 11 Removal and Replacement of Thermistor 68 12 Removal and Replacement Of Fan Motor 69 13 Removal and Replacement of Water Valve 70 14 Removal and Replacement of Pump Motor 40442000000 70 15 Removal and Replacement of Spray 71 1
2. CAP Hoz RUN Log 30M D R R 2 6 49 O6 9 BK Lio ak X Cmn P y BK 9 APOS 2OCONTROL p ER p SW 2 WATER x D LINE T Mg B lai VALVE WIRE COLOR CODE v PRESS BR BROWN TACY WHITE cP BK BLACK c BK RED 0 ORANGE O A ETRANSF RKER PINK D BK DBu DARK BLUE CRANKCASE HEATEI REMOTE CONDENSER UNIT VIOLET Y YELLOW Note Pressure Switch Cut out 412 7 PSIG Cut in 327 21 PSIG 39 c1 KMD 900MAH and KMD 900MWH auxiliary code R 0 and earlier G WIRE WTA NEUTRAL FOR 15V Um BR BR MAGNETIC CONTACTOR FUSE THERMSTOR 208 230 10A W B R BIN CONTROL SWITCH 15 8K d o i FLOAT SW 145 174MFD START CAP STARTER 10 1 WIRE COLOR CODE BR BROWN W WHITE BK BLACK DBu DARK BLUE VIOLET ONLY AIR COOLED MODEL Y YELLOW Note Pressure Switch MAH MWH Cutout 412 5 PSIG Cutout 384 51 PSIG Cutin 327 gt 21 PSIG Cutin 284421 PSIG 40 c2 KMD 900MAH and KMD 900MWH auxiliary code R 1 and later CONTROLLER __ BOARD p BR _ BR 4 MAGNETIC CONTACTOR FUSE THERMISTOR 02 208 230 60 1 10 03 3 WIRE WITH NEUTRAL FOR 115V 13 14 W 4 8 145 17MFD x BN CONTROL lt A SWITCH 15 8K R START CAP 3 158K 24 STARTER i 101 FLOAT SW 1107
3. Note KMD 900M_H models have two expansion valves 34 c KMD 700MRH and KMD 900MRH Condenser Unit Condensing Pressure Regulator Connecting Pipe Condenser Spray Tubes Water High Pressure Switch Water Supply Strainer Float Switch U Evaporator Receiver Tank Access Valve Fusible Plug Cleaning Thermistor Drier Valve j insulation Line Valve Hot Gas Valve Discharge Line Refrigerant g Expansion Valve mmm Water Circuit Drain Valve Note KMD 900M_H models have two expansion valves 35 2 Wiring Diagrams a1 KMD 700MAH and KMD 700MWH auxiliary code R 0 and earlier y BR 208 230 60 1 G WIRE WITH NEUTRAL FOR 15V 445 47 4MFD BIN CONTROL START CAP SWITCH STARTER 0 1 VOLET ONLY AIR COOLED MODEL Y YELLOW Note Pressure Switch MAH MWH Cutout 412 5 PSIG Cutout 384 51 PSIG Cutin 327421 PSIG Cutin 284421 PSIG 36 a2 KMD 700MAH and KMD 700MWH auxiliary code R 1 and later 208 230 60 1 CONTROLLER _ BOARD T 0 1 MAGNETIC CONTACTOR FUSE THERMSTOR 02 K3 10A 03 3 WIRE WITH NEUTRAL FOR 15V 7 145 174MFD START CAP STARTER L1 WIRE COLOR CODE BR BROWN W WHITE BK BLACK R RED 0 ORANGE 133 34 15 8K eer FLOAT SW KS E Ww 8 B BIN CONTROL SINR SWIT
4. R404A 4 105 7 oz 2000 9 Net 80 Ibs 36 kg Shipping 87 Ibs 39 kg One Shot Couplings Aeroquip Permanent Connection Air cooled Condensing Pressure Regulator Min 20 F Max 122 F 29 C to 50 C Outdoor use ll General Information 1 Construction a KMD 700MAH EXPANSION VALVE JUNCTION BOX CONDENSER CONDENSER FAN MOTOR WATER SUPPLY INLET HOT GAS VALVE DRIER 2 V AS A M 7 JEST RS 27 FLOAT SWITCH 13 b KMD 700MWH EXPANSION VALVE WATER SUPPLY INLET HOT GAS VALVE FLOAT SWITCH WATER REGULATOR c KMD 700MRH 7 EXPANSION VALVE WATER SUPPLY INLET HOT GAS VALVE FLOAT SWITCH LINE VALVE d KMD 900MAH CONDENSER HOT GAS VALVE WATER SUPPLY INLET EXPANSION VALVE A EM S ZA 2 7 Lu z Lu Q 2 O O FAN MOTOR DRIER 16 e KMD 900MWH EXPANSION VALVE WATER SUPPLY INLET HOT GAS VALVE JUNCTION BOX pr 4 z WATER REGULATOR f KMD 900MRH EXPANSION VALVE 7 WATER SUPPLY INLET SPRAY TUB PUN HOT GAS VALVE N A X gt X MEE 24 y Z A Xf 7 2 7 SR Em ofa P d ME Ii
5. Reference without marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 lbs WATER _ gal 24HR gal 100 Ibs EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY DRAIN CUBE CONTROL SYSTEM HARVESTING CONTROL SYSTEM ICE MAKING WATER CONTROL COOLING WATER CONTROL BIN CONTROL SYSTEM COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE P C BOARD CIRCUIT PROTECTION COMPRESSOR PROTECTION REFRIGERANT CIRCUIT PROTECTION LOW WATER PROTECTION ACCESSORIES SUPPLIED REQUIRED OPERATING CONDITIONS 208 230 60 1 3 wire with neutral for 115V 15 5 Min Freeze AT 104 F WT 80 F 15 5A 25A WATER TEMP F 6 70 875 397 842 382 767 348 850 386 799 362 706 320 842 382 763 346 676 307 817 370 743 337 596 270 Crescent Cube 9 6 Ibs 4 4 kg 624 pcs N A 90 70 F 70 50 F 2000 6 3 1930 5 3 265 34 7 507 57 9 42 x 24 6 x 28 1067 x 625 x 713 mm Stainless Steel Galvanized Steel Rear Net 240 Ibs 109 kg Shipping 278 Ibs 126 kg Permanent Connection Inlet 1 2 FPT Outlet 3 4 FPT 5 8 OD Tube Float Switch Hot Gas and Water Thermistor and Timer Timer Controlled Overflow Pipe N A Mechanical Level Switch and Timer Hermetic Model CS14K6E PFV 237 Air Cooled Fin and Tube Type Vertical typ
6. Reliability is a beautiful thing HOSHIZAKI MODULAR CRESCENT CUBER 4 MODELS KMD 700MAH KMD 700MWH KMD 700MRH KMD 900MAH KMD 900MWH KMD 900MRH SERVICE MANUAL NM ITEM 73107 Crase Y Pj check ISSUED June 2 2003 NN REVISED July 28 2006 IMPORTANT Only qualified service technicians should attempt to service or maintain this icemaker No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual HOSHIZAKI provides this manual primarily to assist qualified service technicians in the service and maintenance of the icemaker Should the reader have any questions or concerns which have not been satisfactorily addressed please call or write to the HOSHIZAKI Technical Support Department for assistance HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Attn HOSHIZAKI Technical Support Department Phone 1 800 233 1940 Technical Service 770 487 2331 Fax 770 487 3360 Web Site www hoshizakiamerica com NOTE expedite assistance all correspondence communication MUST include the following information Model Number Serial Number Complete and detailed explanation of the problem Please review this manual It should be read carefully before the icemaker is serviced or maintenance operations are performed Only qualified service technicians should service and maintain the icemaker This manual should be made availabl
7. The green LEDs 1 4 represent the corresponding relays and energize and sequence 5 seconds from initial startup as follows Sequence Step EX 1 Minute Fill 4 60 seconds 1 4 2 3 to 5 minutes Freeze Cycle 30 to 35 minutes Reverse Pump Out 1 and 2 factory setting LED 1 Comp LED 2 HGV CFM LED3 PM LED 4 WV The built in safeties shut down the unit and have alarms as follows No of Beeps T f Al 3 sec High Evaporator Temp temperature gt 127 F Defrost Backup Timer defrost gt 20 min Freeze Backup Timer freeze gt 60 min Short Circuit between the K4 connection on the control board and the bin control relay Open Circuit between the K4 connection on the control board and the bin control relay Check for defrost problem stuck HGV or relay hot water entering unit stuck headmaster or shorted thermistor Orange LED marked 20 MIN lights up Check for open thermistor HGV not opening TXV leaking by low charge or inefficient compressor Yellow LED marked 60 MIN lights up Check for F S stuck closed up WV leaking by HGV leaking by TXV not feeding properly low charge or inefficient compressor Check connections and replace wire harness if necessary Check connections and replace wire harness if necessary To manually reset the above safeties press the white alarm reset button w
8. 2 0 2 0 2 0 Note Pressure data is recorded at 5 minutes into freeze cycle The data not in bold should be used for reference only o o Io IN Io N N N w 19 lw NES 14 590 BTU h AT 90 F 32 C WT 70 F 21 C We reserve the right to make changes in specifications and design without prior notice 46 b KMD 700MWH APPROXIMATE ICE AMBIENT TEMP WATER TEMP F C PRODUCTION PER 24 HR F C 50 10 70 21 90 32 70 21 80 27 90 32 Ibs day kg day 100 38 APPROXIMATE ELECTRIC 70 21 80 27 90 32 100 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 32 100 38 HARVEST CYCLE TIME 70 21 80 27 90 32 100 38 HEAD PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 kg em G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 12 200 BTU h 90 F 32 C WT 70 F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 2 020 BTU h AT 90 F 32 C WT 70 F 21 C WATER FLOW FOR CONDENSER 46 GAL HR AT 100 F 38 C WT 90 F 32 C PRESSURE DROP OF COOLING WATER LINE LESS THAN 10 PSIG Note Pressure data is recorded at 5 minutes into freeze cycle The data not in bold should be used for reference only We reserve the right to make changes in specifications and design without prior notice 47 c K
9. 3 10 Secure the insulation using the plastic cable ties 11 Connect the thermistor leads through the bushing of the control box to the K3 connector on the controller board Note Do not cut the leads of the thermistor while installing it 12 Replace the control box cover and the panels in their correct positions 13 Turn on the power supply 12 Removal and Replacement of Fan Motor Note When replacing a fan motor with defective winding it is recommended that a new capacitor be installed 1 Turn off the power supply 2 Remove the panels 3 Remove the junction box cover from the remote condenser unit remote air cooled model 4 Remove the closed end connectors from the fan motor leads 5 Remove the fan motor bracket and fan motor 6 Install the new fan motor and replace the removed parts in the reverse order of which they were removed 7 Replace the panels in their correct positions 8 Replace the junction box cover in its correct position remote air cooled model 9 Turn on the power supply 69 13 Removal and Replacement of Water Valve 1 Turn off the power supply 2 Close the water supply line shut off valve 3 Remove the front panel 4 Remove the valve outlet tubing by releasing the clamp 5 Remove the bracket from the unit 6 Remove the fitting nut and water valve 7 Disconnect the terminals from the water valve 8 Install the new water valve and replace the removed parts in the reve
10. bin is not full a 7 9 KQ reading is sent to the control board to continue operation 2 During operation the controller board will only shut down the machine if a 15 8 KQ signal is received from the bin control during the first 5 minutes of the freeze cycle i If ice pushes the lever to the right after the first five minutes of the freeze cycle the controller board will allow the machine to complete the freeze cycle and the following harvest cycle before shutting down the machine This will prevent incomplete batches of ice from forming on the evaporator 31 c Troubleshooting 1 Machine will not start i Move dip switch no 7 to the OFF position If the machine starts up within a few seconds the bin control is the likely problem If the machine does not start up refer to section IV Service Diagnosis to verify that non bin control related issues are resolved ii Check to make sure shipping tape has been removed and the wires are connected properly iii Check to make sure no obstruction prevents the lever from moving to the bin empty position 2 Machine will not shut off i Refer to Section IV Service Diagnosis to verify that non bin control related issues are resolved ii Dip switch no 7 should be in the on position If the switch is in the off position the controller board will not receive input from the bin control iii Move the lever to the far right a If the machine does not shu
11. 2 0 90 32 2 0 100 38 2 0 HEAD PRESSURE 70 21 268 18 9 80 27 301 21 1 90 32 326 23 0 PSIG 100 38 360 25 3 SUCTION PRESSURE 70 21 39 27 80 27 46 3 2 90 32 52 3 6 PSIG 100 38 58 4 1 TOTAL HEAT OF REJECTION FROM CONDENSER 18 865 BTU h AT 90 F 32 C WT 70 F 21 C Note Pressure data is recorded at 5 minutes into freeze cycle The data not in bold should be used for reference only We reserve the right to make changes in specifications and design without prior notice 49 e KMD 900MWH APPROXIMATE ICE AMBIENT TEMP WATER TEMP F C PRODUCTION PER 24 HR FC 70 21 80 27 90 32 lbs day _kg day 100 38 APPROXMATE ELECTRIC 70 21 80 27 90 32 100 38 APPROXMATE WATER 70 21 CONSUMPTION PER 24 HR 80 27 90 32 gal day 100 38 FREEZING CYCLE TIME 70 21 80 27 90 32 100 38 HARVEST CYCLE TIME 70 21 80 27 90 32 100 38 HEAD PRESSURE 70 21 80 27 90 32 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 13 480 BTU h AT 90 F 32 C WT 70 F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 2 440 BTU h AT 90 F 32 C WT 70 F 21 C WATER FLOW FOR CONDENSER 61 GAL HR AT 100 38 C WT 90 F 32 C PRESSURE DROP OF COOLING WATER LINE LESS THAN 10 PSIG Note Pressure data is recorded at 5 minutes into freeze cycle The data not in bold should be used for reference
12. 7 w 74 a Sx NIA j 43 PP 2 AV 0 9 MAX DOOR ET A Y Y Th A N 2 3 A os f Sd 4 MN 4 a ABN gt 9 n a PN VES en raa a GS RECEIVER TANK 2 Controller Board a Solid State Control 1 AHOSHIZAKI exclusive solid state control is employed in KMD Modular Crescent Cubers 2 A printed circuit board hereafter called controller board includes a stable and high quality control system 3 All models are pretested and factory adjusted b Controller Board CAUTION Fragile handle very carefully Acontroller board contains integrated circuits which are susceptible to failure due to static discharge It is especially important to touch the metal part of the unit when handling or replacing the board Do not touch the electronic devices on the board or the back of the board to prevent damage to the board Do not change wiring and connections Do not misconnect K3 K4 and K5 because the same connector is used for the thermistor white float switch black and mechanical bin control red Always replace the whole board assembly when it goes bad Do not short out power supply to test for voltage Part Number Type 2A1410 01 HOS 001A Control Products Features of Control Products E Controller Board 1 Maximum Water Supply Period 6 minutes Water solenoid valve opening in the defrost harvest cycl
13. ICE ICE PRODUCTION PER CYCLE APPROXMATE STORAGE CAPACITY ELECTRIC 8 WATER CONSUMPTION ELECTRIC W kWH 100 Ibs WATER gal 24HR gal 100 Ibs WATER COOLED CONDENSER gal 24HR gal 100 Ibs EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY DRAIN CUBE CONTROL SYSTEM HARVESTING CONTROL SYSTEM ICE MAKING WATER CONTROL COOLING WATER CONTROL BIN CONTROL SYSTEM COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE P C BOARD CIRCUIT PROTECTION COMPRESSOR PROTECTION REFRIGERANT CIRCUIT PROTECTION LOW WATER PROTECTION ACCESSORIES SUPPLIED REQUIRED OPERATING CONDITIONS 208 230 60 1 3 wire with neutral for 115V 12 A 5 Min Freeze AT 104 F WT 80 F 12 9 20A Ambie Boh im m wi 7701 818 675 306 611 277 569 258 601 273 665 302 530 240 nt 70 701 318 80 597 271 90 100 Crescent Cube 9 6 Ibs 4 4 kg 624 pcs N A 90 70 F 70 50 F 1520 6 0 1500 5 1 203 33 3 272 38 9 607 99 403 58 30 x 24 6 x 28 762 x 625 x 713 mm Stainless Steel Galvanized Steel Rear Net 217 Ibs 98 kg Shipping 249 Ibs 113 kg Permanent Connection Inlet 1 2 FPT Condenser Inlet 1 2 FPT Outlet 3 4 FPT Condenser Outlet 3 8 FPT 5 8 OD Tube Float Switch Hot Gas and Water Thermistor and Timer Timer Controlled Overflow Pipe Pressure Regulator Mechanical Level Switch an
14. Min Freeze AT 104 F WT 80 F 13 15A 20A WATER TEMP F Ambient a 70 80 614 278 90 100 715 324 679 308 605 275 662 300 690 313 538 244 Crescent Cube 9 6 Ibs 4 4 kg 624 pcs N A 90 70 F 70 50 F 1790 6 3 1750 5 7 218 32 1 385 52 7 30 x 24 6 x 28 762 x 625 x 713 mm Stainless Steel Galvanized Steel Rear Net 203 Ibs 92 kg Shipping 235 Ibs 107 kg Permanent Connection Inlet 1 2 FPT Outlet 3 4 FPT 5 8 OD Tube Float Switch Hot Gas and Water Thermistor and Timer Timer Controlled Overflow Pipe N A Mechanical Level Switch and Timer Hermetic Model CS10K6E PFV 279 Air Cooled Remote Condenser Unit URC 12 F Vertical type Stainless Steel and Copper Thermostatic Expansion Valve Condensing Pressure Regulator on URC 12F R 404A 1010 0 5 oz 45509 Icemaker 5 16 9 9 oz Cond Unit 4 Ib 6 5 oz High 467PSIG Low 230PSIG High Voltage Cut out Internal Auto reset Overload Protector Internal Auto reset High Pressure Control Switch Float Switch N A Ice Dispenser or Ice Storage Bin VOLTAGE RANGE 187 253 V AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 F WATER SUPPLY PRESSURE 20 145 PSIG We reserve the right to make changes in specifications and design without prior notice 7 4 KMD 900MAH AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day
15. Switch Dip Switch No 1 No 2 OFF OFF 60 seconds ON OFF 90 seconds OFF ON 120 seconds ON ON 180 seconds 27 3 Drain Timer The drain timer is factory adjusted and no adjustment is required SETTING TIME Dip Switch Dip Switch No 3 No 4 T1 T2 OFF OFF 10 seconds 150 seconds ON OFF 10 seconds 180 seconds OFF ON 10 seconds 120 seconds ON ON 20 seconds 180 seconds T1 Time to drain the water tank T2 Time to restrain defrost completion 4 Drain Counter The drain counter is factory adjusted to drain the water tank every 10 cycles and no adjustment is required However where water quality is bad and the icemaker needs a pump drain more often the drain counter can be adjusted as shown in the table below SETTING FREQUENCY Dip Switch Dip Switch No 5 No 6 OFF OFF every cycle ON OFF every 2 cycles OFF ON every 5 cycles ON ON every 10 cycles 28 5 Freeze Timer CAUTION Adjust to proper specification or the unit may not operate correctly Two new dip switches numbered 9 and 10 have been added to the improved E board to better prevent possible freeze ups These settings come factory set to the default setting of 60 min OFF OFF Check the adjustment chart published in the Tech Specs for proper settings If the old board does not have these two dip switches only 8 instead of 10 leave setting as OFF OFF SETTING TIME Dip Switch Dip Switch No 9 No 10 OFF OFF 60 min ON OFF 70 min OFF ON 50 min O
16. high thermal conductive type Model KE4560RTV manufactured by Shinetsu Silicone Part Code 60Y000 11 or Part Code 4A0683 01 equivalent 3 Always use a recommended foam insulation non absorbent type or equivalent 4 Do not shorten or cut the thermistor leads when installing it 1 Turn off the power supply Thermistor Lead Cable Tie 2 Remove the panels 3 Remove the control box cover SS SS 4 Disconnect the thermistor leads from the K3 connector on the controller board 5E 53 5 Remove the plastic cable ties foam insulation thermistor holder and Foam Insulation Thermistor Holder thermistor See Fig 2 Fig 2 6 Scrape away the old sealant on the thermistor holder and the suction pipe 7 Wipe off moisture or condensation on the suction pipe 8 Smoothly apply recommended sealant KE4560RTV Part Code 60Y000 11 or 4A0683 01 to the thermistor holder concave 9 Attach the new thermistor to the suction pipe very carefully to prevent damage to the leads And secure it using the thermistor holder and recommended foam insulation Note For models with the liquid bypass the thermistor should be located upstream from the liquid bypass outlet and its end should be 4 3 4 or more away from the outlet See Fig 3 68 Min 4 3 4 rar TE m Liquid Bypass AU 17 Flow 4 4 2 27 A E HT _ TATAY Fig
17. only We reserve the right to make changes in specifications and design without prior notice 50 f KMD 900MRH APPROXIMATE ICE AMBIENT TEMP WATER TEMP F C PRODUCTION PER 24 HR 50 10 70 21 90 32 70 21 80 27 90 32 Ibs day kg day 100 38 APPROXIMATE ELECTRIC 70 21 80 27 90 32 100 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 32 100 38 HARVEST CYCLE TIME 70 21 80 27 90 32 100 38 HEAD PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 kg cm G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 12 100 BTU h AT 90 F 32 C WT 70 F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 2 000 BTU h AT 90 F 32 C WT 70 F 21 C CONDENSER VOLUME 132 CU IN URC 12F Note Pressure data is recorded at 5 minutes into freeze cycle The data not in bold should be used for reference only We reserve the right to make changes in specifications and design without prior notice 51 IV Service Diagnosis 1 No Ice Production 1 The icemaker will not a Power Supply 1 OFF position 1 Move to ON position 2 Loose connection 3 Bad contacts 3 Check for continuity and replace 4 Voltage too high 4 Check and get recommended voltage b Fuse Inside fused 1 Blown 1 Check for short circuit and disconnect if any replace c Control Switch 1 OFF position 1 Move to
18. oz of recommended cleaner Hoshizaki Scale Away or LIME A WAY Economics Laboratory Inc with 2 5 gallons of water 2 Remove all ice from the evaporator and the storage bin 76 Note To remove cubes on the evaporator turn off the power supply and turn it back on after 3 minutes The defrost cycle starts and the cubes will be removed from the evaporator 3 Turn off the power supply 4 Remove the front panel Then remove the insulation panel by removing thumbscrew lifting up the panel slightly and pulling it toward you Remove cube guide B by removing thumbscrew Remove cube guide A Remove overflow cap overflow pipe and water shield 5 Remove the drain plug located inside the water tank Drain the water tank Replace the drain plug in its correct position 6 Pour the cleaning solution into the water tank 7 Fully open the cleaning valve on the left side wall of the machine compartment 8 Move the control switch on the control box to the WASH position 9 Replace water shield overflow pipe overflow cap cube guide A cube guide B and insulation panel in their correct positions Replace the front panel in its correct position 10 Turn on the power supply and start the washing process 11 Turn off the power supply after 30 minutes 12 Remove the front panel 13 Remove the insulation panel by removing thumbscrew lifting up the panel slightly and pulling it toward you Remove cube guide B by removing t
19. the pressures balance 8 If necessary add any remaining charge to the system through the low side Use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low side access port with the unit running 9 Close the two refrigerant access valves and disconnect the hoses and service manifold 10 Cap the access valves to prevent a possible leak 2 Brazing ANGER 1 Refrigerant R 404A itself is not flammable at atmospheric pressure and temperatures up to 176 F Refrigerant R 404A itself is not explosive or poisonous However when exposed to high temperatures open flames R 404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous Always recover the refrigerant and store it in an approved container Do not discharge the refrigerant into the atmosphere Do not use silver alloy or copper alloy containing arsenic Do not use R 404A as a mixture with pressurized air for leak testing Refrigerant leaks can be detected by charging the unit with a little refrigerant raising the pressure with nitrogen and using an electronic leak detector Note All brazing connections inside the evaporator case are clear paint coated Sandpaper the brazing connections before unbrazing the components Use a good abrasive cloth to remove coating 58 3 Removal and Replacement of Compressor IMPORTANT Always install a new drier every time the sealed re
20. valve Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Turn off the power supply 2 Remove the panels 61 3 Recover the refrigerant and store it in an approved container 4 Remove the insulation and the expansion valve bulb on the suction line 5 Remove the expansion valve cover and disconnect the expansion valve using brazing equipment 6 Braze the new expansion valve with nitrogen gas flowing at a pressure of 3 4 PSIG WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating Do not braze with the valve body exceeding 250 F 7 Install the new drier 8 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 9 Evacuate the system and charge it with refrigerant For air cooled and water cooled models see the nameplate for the required refrigerant charge For remote air cooled models see the charge label in the machine compartment 10 Attach the bulb to the suction line in position Be sure to secure it with clamps and to insulate it 11 Place the new set of expansion valve covers in position 12 Replace the panels in their correct positions 13 Turn on the power supply 6 Removal and Replacement of Hot Gas Valve and Line Valve CAUTION Always use a copper tube of the same diameter and length when replacing the hot gas
21. 0 F 14 7 25A WATER TEMP F so 7 0 886 402 859 390 816 370 865 392 823 373 777 352 859 390 793 360 747 339 848 385 782 355 705 320 Crescent Cube 9 6 Ibs 4 4 kg 624 pcs N A 90 70 F 70 50 F 1950 5 9 1950 5 3 301 37 9 452 51 1 831 105 526 59 30 x 24 6 x 28 762 x 625 x 713 mm Stainless Steel Galvanized Steel Rear Net 219 Ibs 99 kg Shipping 251 Ibs 114 kg Permanent Connection Inlet 1 2 FPT Condenser Inlet 1 2 Outlet 3 4 FPT Condenser Outlet 3 8 FPT 5 8 OD Tube Float Switch Hot Gas and Water Thermistor and Timer Timer Controlled Overflow Pipe Pressure Regulator Mechanical Level Switch and Timer Hermetic Model CS14K6E PFV 237 Water cooled Tube in Tube Type Vertical type Stainless Steel and Copper Thermostatic Expansion Valve R 404A 2 Ib 0 Oz 900g High 427PSIG Low 230PSIG High Voltage Cut out Internal Auto reset Overload Protector Internal Auto reset High Pressure Control Switch Float Switch N A Ice Dispenser or Ice Storage Bin VOLTAGE RANGE 187 253 V AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 F WATER SUPPLY PRESSURE 20 145 PSIG We reserve the right to make changes in specifications and design without prior notice 9 6 KMD 900MRH AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day Reference withou
22. 1 3 wire with neutral for 115V 13 5 5 Min Freeze AT 104 F WT 80 F 14 3A 20A Ambient WATER TEMP F Temp F o o 9 219 432 196 70 593 269 80 536 243 90 244 3 100 526 239 650 295 539 244 48 641 291 Crescent Cube 9 6 Ibs 4 4 kg 624 pcs N A 90 70 F 70 50 F 1590 7 1 1540 5 3 202 37 5 406 58 4 30 x 24 6 x 28 762 x 625 x 713 mm Stainless Steel Galvanized Steel Rear Net 217 165 98 kg Shipping 249 Ibs 113 kg Permanent Connection Inlet 1 2 FPT Outlet 3 4 FPT 5 8 OD Tube Float Switch Hot Gas and Water Thermistor and Timer Timer Controlled Overflow Pipe N A Mechanical Level Switch and Timer Hermetic Model CS10K6E PFV 237 Air Cooled Fin and Tube Type Vertical type Stainless Steel and Copper Thermostatic Expansion Valve R 404A 2 lb 8 6 oz 11509 High 467PSIG Low 230PSIG High Voltage Cut out Internal Auto reset Overload Protector Internal Auto reset High Pressure Control Switch Float Switch N A Ice Dispenser or Ice Storage Bin VOLTAGE RANGE 187 253 V AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 F WATER SUPPLY PRESSURE 20 145 PSIG We reserve the right to make changes in specifications and design without prior notice 5 2 KMD 700MWH AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day Reference without marks SHAPE OF
23. 12 2 2 33 b KMD 700MWH KMD 900MWH Liuius unn nuns ek AAA 34 c KMD 700MRH and KMD 900MRH ZEE AEO 35 IE RE m m UT 36 a1 KMD 700MAH and KMD 700MWH auxiliary code R 0 and earlier 36 a2 KMD 700MAH and KMD 700MWH auxiliary code R 1 and later 37 01 KMD 700MRH auxiliary code R 0 and 38 b2 KMD 700MRH auxiliary code R 1 and 39 c1 KMD 900MAH and KMD 900MWH auxiliary code R 0 and earlier 40 c2 KMD 900MAH and KMD 900MWH auxiliary code R 1 and later 41 d1 KMD 900MRH auxiliary code R 0 and 42 d2 KMD 900MRH auxiliary code R 1 and 43 3 Smau per ene RAB 44 Pertormance 1 46 e RMO ZOOMAF wacka Uo cc au 46 47 E RMBZDOMAF METTE 48 ld KMD 900MAH A AYA 9 Y U 49 KMD 900MW H PT oT 50 POO ATA obozach c o H 51 V Semice Diagnosis 52 TING TCS 52 2 Evaporator is Frozen Up CPP 55 LOW lce RR 56 HE 56 LO EMT
24. 6 Removal and Replacement of Bin Control 72 VI Cleaning and Maintenance Instructions biais due 73 1 Preparing the Icemaker for Long Storage Luton rrt tonio ER kane Dos 73 2 Sa TET 76 la Cleaning 76 b Sanitizing Procedure Following Cleaning Procedure 79 3 ilg M 80 I Specifications 1 KMD 700MAH AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day Reference without marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 lbs WATER gal 24HR gal 100 Ibs EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY DRAIN CUBE CONTROL SYSTEM HARVESTING CONTROL SYSTEM ICE MAKING WATER CONTROL COOLING WATER CONTROL BIN CONTROL SYSTEM COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE P C BOARD CIRCUIT PROTECTION COMPRESSOR PROTECTION REFRIGERANT CIRCUIT PROTECTION LOW WATER PROTECTION ACCESSORIES SUPPLIED REQUIRED OPERATING CONDITIONS 208 230 60
25. CH 15 8K R 2 93 WATER DRAN VALVE VALVE 6 1 APDS 2 CONTROL p SW GY GRAY PINK DBu DARK BLUE V VIOLET Y YELLOW Note Pressure Switch ONLY AIR COOLED MODEL MAH Cutout 4124 3 PSIG Cut out Cut in 327 21 PSIG Cut in 37 BR TRANSFORMER MWH 384 A PSIG 284 21 PSIG b1 KMD 700MRH auxiliary code R 0 and earlier CONTROLLER a 208 230 60 1 MAGNETIC CONTACTOR THERMSTOR m 2 3 WRE WITH NEUTRAL FOR 15V P A gt 145 174MFD BIN CONTROL ex START CAP SWITCH e i STARTER 0 A go ij Ny an H 4 Y WRE COLOR CODE 5 BR BROWN 9 W WHITE BK BLACK R RED 0 ORANGE GY GRAY PNK aLug CRANKCASE HEAT REMOTE CONDENSER UNIT VIOLET YELLOW Note Pressure Switch Cut out 412 2 PSIG Cut in 327 21 PSIG 38 b2 KMD 700MRH auxiliary code R 1 and later CONTROLLER 12 1 BR _ BR 1 MAGNETIC CONTACTOR FUSE THERMSTOR 208 230 60 1 10A jlo3 3 WIRE WITH NEUTRAL FOR 15V 92 B al R BIN CONTROL in T 1 145 174 133 34 158K Rlicz START 3 3 SWITCH EK STARTER 1 FLOAT w C K5 3 93 L 1 j
26. ER BK BLACK X R RED KA3 02 0 ORANGE GY GRAY EE is KAR CRANKCASE HEATER REMOTE CONDENSER UNIT a DBu DARK BLUE VIOLET Y YELLOW Note Pressure Switch Cut out 412 PSIG Cut in 327 21 PSIG 43 3 Timing Chart When control switch is turned OFF pressure switch is OFF thermistor temperature exceeds t1 or bin control is in full position during first 5 minutes of freeze cycle for mechanical bin control only 2 From defrost cycle To defrost cycle If float switch is OFF Too High Temp Too Low Temp Temp Stand by Water Supply Mode 4 Thermistor 5 1 2 E Compressor OFF ON Heater E Icemaking Pump Motor OFF Drain Pressure N al Fan Motor Switch amp Line Valve OF ON Overheat Fan Motor ON Protect Condenser Unit ore Reset 4 ON Water Valve OFF ON Hot Gas Valve OFF Note 1 The icemaker does not complete a defrost cycle in the first 2 or 3 minutes See 2 d Controls and Adjustments 2 The bin control will only shut off the ice machine during the first 5 minutes of the freeze cycle 44 To stand by cycle When control switch is turned OFF pressure switch is OFF thermistor temperature exceeds t1 or bin control is in full position during first 5 minutes of freeze cycle for mechanical bin control only 3 To freeze cycle From freeze cycle Too Low Temp EA D
27. ICE position 2 Bad contacts 2 Check for continuity and replace gt 2 Bin Control 1 11 3 Troubleshooting High Pressure Control 1 Bad contacts 1 Check for continuity and replace f Transformer 1 Thermal fuse blown or coil 1 Replace winding opened 9 Wiring to Controller 1 Loose connections or 1 Check for continuity and Board open replace h Thermistor 1 Leads short circuit or open 1 See II 2 d Controls and and high temperature Adjustments 1 Defrost safety operates Control d e i Hot Gas Solenoid Continues to open in 1 Check for power off in Valve freeze cycle and high freeze cycle and replace temperature safety operates j Water Supply Line Water supply off and water 1 Check and get supply cycle does not recommended pressure finish Condenser water pressure 2 Check and get too low or off and pressure recommended pressure control opens and closes frequently to finally operate high temperature safety k Water Solenoid Mesh filter or orifice gets 1 Clean clogged and water supply cycle does not finish Coil winding opened 2 Replace Wiring to water valve 3 Check for loose connection or open and replace Problem Possible Cause Remedy 1 Continued from Controller Board 1 Defective 1 Il 2 e Checking the previous page Controller Board m Interlock Switch 1 OFF Position Position Move to 1 Mov
28. K5 NY 0 GY WATER DRAN E VALVE 51 51 WIRE COLOR CODE i BR BROWN W WHITE BK BLACK R ED 201 1 0 ORANGE i ee EI GY GRAY 0709979 PINK BK TRANSFORMER DBu DARK BLUE VIOLET ONLY AIR COOLED MODEL Y YELLOW Note Pressure Switch MAH MWH 21 21 Cutout 412 PSIG Cutout 384 5 PSIG Cutin 327 21 PSIG Cutin 284 21 PSIG 41 d1 KMD 900MRH auxiliary code R 0 and earlier P CONTROLLER 1 2 __ BOARD LE THERMST 208 230 60 1 ERMSTOR 92 Es G WITH NEUTRAL FOR 115 2 701 RT 5 START CAP iH STARTER L1 WIRE COLOR CODE Dau DARK BLUE CRANKCASE HEATER REMOTE CONDENSER UNIT V VIOLET Y YELLOW Note Pressure Switch Cut out 412 3 PSIG Cut in 327 21 PSIG 42 d2 KMD 900MRH auxiliary code R 1 and later CONTROLLER BOARD lx 1 MAGNETIC CONTACTOR FUSE THERMSTOR 07 K3 208 230 60 1 40A 03 3 WIRE WITH NEUTRAL FOR 15V A B BN CONTROL Z 11 145 174MFD 58K 81221 5 SWITCH STARTER 1 FLOAT SW 5 P7722 6 Al 2 NY 0 DBu R 04 T CABOS ile y 1 p 4p p SW WATER DRAN L D LINE HOTGAS lg VALVE VALVE KA VALVE VALVE R WRE COLOR CODE Q 3 PRESS W WHITE dej KC2
29. MD 700MRH APPROXIMATE ICE AMBIENT TEMP WATER TEMP F C PRODUCTION PER 24 HR 70 21 80 27 90 32 Ibs day kg day 100 38 APPROXIMATE ELECTRIC 70 21 80 27 90 32 100 38 APPROXMATE WATER 70 21 CONSUMPTION PER 24 HR 80 27 90 32 gal lday 100 38 FREEZING CYCLE TIME 70 21 80 27 90 32 100 38 HARVEST CYCLE TIME 70 21 80 27 90 32 100 38 HEAD PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 2 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 12 100 BTU h AT 90 F 32 C WT 70 F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 1 900 BTU h AT 90 F 32 C WT 70 F 21 C CONDENSER VOLUME 132 CU IN URC 12F Note Pressure data is recorded at 5 minutes into freeze cycle The data not in bold should be used for reference only We reserve the right to make changes in specifications and design without prior notice 48 d KMD 900MAH APPROXIMATE ICE AMBIENT TEMP WATER TEMP F C PRODUCTION PER 24 HR F C 90 32 70 21 397 842 382 767 348 80 27 386 799 362 706 320 90 32 382 763 346 676 307 Ibs day _kg day 100 38 370 743 337 596 270 APPROXIMATE ELECTRIC 70 21 2039 CONSUMPTION 80 27 2099 90 32 2109 watts 100 38 2210 APPROXIMATE WATER 70 21 390 1 48 CONSUMPTION PER 24 HR 80 27 325 1 23 90 32 235 0 89 gal day m day 100 38 i 207 0 78 FREEZING CYCLE TIME 70 21 15 80 27 17 90 32 18 100 38 20 HARVEST CYCLE TIME 70 21 2 0 80 27
30. N ON 60 min 6 Bin Control CAUTION Dip switch no 7 must be set to the ON position If No 7 is set to the OFF position the machine will run continuously causing a freeze up condition No adjustment is required The bin control is factory adjusted 29 e Checking the Controller Board 1 Visually check the sequence with the icemaker operating 2 Visually check the controller board by using the following procedures i ii iii iv Adjust the defrost timer to minimum position Disconnect the thermistor from the controller board Connect a 1 5 kQ 3 5 kQ resistor to the connector K3 pins 1 and 2 and energize the unit After the 1 minute 5 second water supply cycle and the 2 minute 10 second defrost cycle the unit should start the freeze cycle After the above step i disconnect the float switch leads from the controller board within the first 5 minutes of the freeze cycle The unit should go into the defrost cycle after the first 5 minutes 20 seconds of the freeze cycle Reconnect the float switch connector to the controller board After the first 5 minutes of the freeze cycle disconnect the float switch leads from the controller board At this point the unit should start the defrost cycle After step iii de energize the unit and confirm that the defrost timer is in the minimum position Disconnect the resistor from the controller board and energize the unit After the 1 minu
31. RC 12 F Vertical type Stainless Steel and Copper Thermostatic Expansion Valve Condensing Pressure Regulator on URC 12F R 404A 9 Ib 6 Oz 4250g Icemaker 4 Ibs 15 oz Cond Unit 4 Ib 7 oz High 467PSIG Low 230PSIG High Voltage Cut out Internal Auto reset Overload Protector Internal Auto reset High Pressure Control Switch Float Switch N A Ice Dispenser or Ice Storage Bin VOLTAGE RANGE 187 253 V AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 F WATER SUPPLY PRESSURE 20 145 PSIG We reserve the right to make changes in specifications and design without prior notice 10 7 Condensing Unit URC 12F 36 13 16 935mm 33 15 32 850mm 27 9 16 10x20mm 4x3 SLOTTED HOLES 17 1 8 435mm 14 15 16 380mm 14 9 16 370mm 14 1 16 357mm 15 11 16 398mm eee GIONE Th BUA C gt 3 zz 1 KPP 1 35 11 16 907 2 lt SS Se FS 21 15 16 557 8mm ELECT SUPPLY 7 8 DIAM OPENING 15 3 4 2 15 16 380mm 380mm 11 MODEL URC 12F Specifications EXTERIOR DIMENSIONS W x D x H REFRIGERANT CHARGE URC 12F WEIGHT CONNECTIONS REFRIGERANT ELECTRICAL CONDENSER HEAD PRESSURE CONTROL AMBIENT CONDITION 12 Galvanized Steel 35 11 16 x 15 11 16 x 21 15 16 907 2 x 398 x 557 8 mm
32. arvest cycle After 2 consecutive timer terminations machine will shut down possibly indicating a problem 26 1 Defrost Control A thermistor semiconductor is used for a defrost control sensor The resistance varies depending on the suction line temperatures The thermistor detects the temperature of the evaporator outlet to start the defrost timer No adjustment is required If necessary check for resistance between thermistor leads and visually check the thermistor mounting located on the suction line next to the evaporator outlet Temperature F Resistance kQ 0 14 401 10 10 613 32 6 000 50 3 871 70 2 474 90 1 633 Check a thermistor for resistance by using the following procedures i Disconnect the connector K3 on the board ii Remove the thermistor See V 11 Removal and Replacement of Thermistor iii Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes iv Check for a resistance between thermistor leads Normal reading is within 3 5 to 7 Replace the thermistor if it exceeds the normal reading 2 Defrost Timer No adjustment is required under normal use as the defrost timer is adjusted to the suit able position However if necessary when all the ice formed on the evaporator does not fall into the bin in the harvest cycle adjust the defrost timer to longer setting by adjusting the dip switch no 1 amp 2 on the controller board SETTING TIME Dip
33. bscrew Remove cube guide A Remove overflow cap overflow pipe and water shield See Fig 5 4 Remove the drain plug 5 Remove all ice from the storage bin and clean the storage bin 6 Replace drain plug water shield overflow pipe overflow cap cube guide A cube guide B and insulation panel in their correct positions 7 Replace the front panel in its correct position 8 Close the water supply line shut off valve 74 Overflow Cap Overflow Pipe Drain Plug Cube Guide A 75 2 Cleaning Instructions WARNING HOSHIZAKI recommends cleaning this unit at least once a year More frequent cleaning however may be required in some existing water conditions TO prevent injury to individuals and damage to the icemaker do not use ammonia type cleaners Always wear liquid proof gloves to prevent the cleaning and sanitizing solution from coming into contact with skin IMPORTANT The cleaning valve is used to provide access to the inside of the evaporator during the cleaning and sanitizing operation It should be closed for all icemaking operation The compressor will not operate unless this valve is completely closed open the cleaning valve the valve handle should be parallel to the valve body To close the valve the valve handle should be at a right angle to the valve body CLOSED POSITION OPEN POSITION a Cleaning Procedure 1 Dilute approximately 13 5 fl
34. cool Increase temperature temperature Line Valve 1 Continues to open in Check operation in harvest harvest cycle cycle and replace Thermistor 1 Out of position or loose See V 11 Removal and attachment Replacement of Thermistor g Controller Board 1 Defrost timer 15 set too 1 Adjust longer referring to short 2 4 Controls and Adjustments 2 Defrost Timer 2 Defective 2 See 11 2 Checking the Controller Board a Spray Tubes 1 Clogged 2 Out of position 2 Place in position b Water lb Water System 1 M Dity 1 Clean Refrigerant 1 for leaks and recharge Expansion Valve 1 Bulb out of position or Place in position loose attachment e Hot Gas Solenoid 1 Coil winding opened 1 Replace Valve 2 Plunger does not move 2 Replace 3 Wiring to hot gas valve 3 Check for loose connection or open and replace 3 Low Ice Production 1 Freeze cycle time is See chart 1 3 and check high pressure control and water regulator long See chart 2 1 and check float switch water solenoid valve and controller board 2 Harvest cycle time is See chart 2 2 and check evaporator water supply line water solenoid valve ambient and or water temperature line valve thermistor and controller board 4 Abnormal Ice Possible Cause Remedy 1 Small cubes Ice Cube Guide Out of position Circulated 1 Place in position water fall
35. ctive See 2 Checking the Controller Board Fan Motor _ Motor winding opened E Wiring to fan motor gt Check for loose connection or open and replace Controller Board Defective See 2 Checking the Controller Board a Refrigerant Check for leaks and recharge recharge b Compressor 1 Defective valve 1 Replace Valve freeze cycle freeze cycle 7 Continued from e Water Supply Line 1 Condenser water pressure 1 Check and get previous page Water cooled model too low or off and pressure recommended pressure only control opens and closes frequently 2 Evaporator is Frozen Up Possible Cause Lol 1 Freeze cycle time is a Float Switch 1 Leads short circuit or Check and replace too long defective switch 2 Float does not move 2 Clean or replace freely b Water Solenoid Valve 1 Diaphragm does not close 1 Check for water leaks with icemaker off c Controller Board 1 Defective 1 See 2 Checking the Controller Board 2 All ice formed on 2 Evaporator 1 1 Scaled up 1 Scaled up 1 evaporator does water tns Line 1 Water pressure too low E M and get fall into bin in acc recommended pressure de Water Solenoid Valve 1 Dirty mesh filter or orifice mesh filter or orifice 1 1 Glen 2 NELLE does not close 2 LO for water leaks with icemaker off d Ambient and or water 1 Too
36. d Timer Hermetic Model CS10K6E PFV 237 Water cooled Tube in Tube Type Vertical type Stainless Steel and Copper Thermostatic Expansion Valve R 404A 1 Ib 10 Oz 730g High 427PSIG Low 230PSIG High Voltage Cut out Internal Auto reset Overload Protector Internal Auto reset High Pressure Control Switch Float Switch N A Ice Dispenser or Ice Storage Bin VOLTAGE RANGE 187 253 V AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 F WATER SUPPLY PRESSURE 20 145 PSIG We reserve the right to make changes in specifications and design without prior notice 6 3 KMD 700MRH AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day Reference without marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXMATE STORAGE CAPACITY ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 lbs WATER gal 24HR gal 100 Ibs EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY DRAIN CUBE CONTROL SYSTEM HARVESTING CONTROL SYSTEM ICE MAKING WATER CONTROL COOLING WATER CONTROL BIN CONTROL SYSTEM COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE P C BOARD CIRCUIT PROTECTION COMPRESSOR PROTECTION REFRIGERANT CIRCUIT PROTECTION LOW WATER PROTECTION ACCESSORIES SUPPLIED REQUIRED OPERATING CONDITIONS 208 230 60 1 3 wire with neutral for 115V 13A 5
37. e Stainless Steel and Copper Thermostatic Expansion Valve R 404A 3 Ib 8 3 Oz 16009 High 467PSIG Low 230PSIG High Voltage Cut out Internal Auto reset Overload Protector Internal Auto reset High Pressure Control Switch Float Switch N A Ice Dispenser or Ice Storage Bin VOLTAGE RANGE 187 253 V AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 F WATER SUPPLY PRESSURE 20 145 PSIG We reserve the right to make changes in specifications and design without prior notice 5 KMD 900MWH AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day Reference without marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 lbs WATER gal 24HR gal 100 Ibs WATER COOLED CONDENSER gal 24HR gal 100 Ibs EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY DRAIN CUBE CONTROL SYSTEM HARVESTING CONTROL SYSTEM ICE MAKING WATER CONTROL COOLING WATER CONTROL BIN CONTROL SYSTEM COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE P C BOARD CIRCUIT PROTECTION COMPRESSOR PROTECTION REFRIGERANT CIRCUIT PROTECTION LOW WATER PROTECTION ACCESSORIES SUPPLIED REQUIRED OPERATING CONDITIONS 208 230 60 1 3 wire with neutral for 115V 14 A 5 Min Freeze 104 F WT 8
38. e is limited by the defrost timer The water valve cannot remain open longer than the maximum period The water valve can close in less than six minutes if the defrost cycle is completed 19 2 Defrost Timer The defrost cycle starts when the float switch opens and completes the freeze cycle But the defrost timer does not start counting until the thermistor senses 48 F at the evaporator outlet The period from the end of the freeze cycle up to the point of the thermistor s sensing varies depending on the ambient and water temperatures 3 High Temperature Safety 127 7 F The temperature of the suction line in the refrigerant circuit is limited by the high temperature safety During the defrost cycle the evaporator temperature rises The thermistor senses 48 F and starts the defrost timer After the defrost timer counts down to zero the normal freeze cycle begins If the evaporator temperature continues to rise the thermistor will sense the rise in temperature and at 127 7 F the thermistor operates the high temperature safety This high temperature safety shuts down the circuit and the icemaker automatically stops This high temperature safety protects the unit from excessive temperature The control board will beep every 3 seconds The white reset button on the control board must be pressed with power on to reset the safety 4 Low Water Safety If the pump motor is operated without water the mechanical seal can fail To prev
39. e to ON position 1 Move to ON position Cleaning Valve DL Bad contacts 2 Check for continuity and replace 2 Water continues to Float Switch 1 Connector disconnected disconnected 1 Place position in 1 Place position be supplied and the 2 Leads opened or Connector disconnected 2 Check and replace icemaker will not switch stan 3 Float does not move 3 Clean or replace freely b Controller Board 1 Defective Replace 3 Compressor will not a Wash Switch 1 WASH position 1 Move to ICE position b High Pressure Control 1 Dirty air filter or 1 Clean condenser 2 Ambient or condenser 2 Reduce temperature water temperature too warm components plugged water cooled model 6 Condenser water pressure 6 Check and get too low or off Water recommended pressure cooled model only c Overload Protector 1 Bad contacts 1 Check for continuity and replace 2 Voltage too low Increase voltage 3 Refrigerant overcharged 3 Recharge undercharged 4 Line valve continues to 4 Check line valve s close in freeze cycle and operation in freeze cycle overload protector and replace operates Starter Check and Coil winding EEA 2 Replace ges pes 2 Coil winding opened g Compressor 1 Wiring to compressor Check for loose connection or open and replace 2 Defective 2 Replace 3 Protector tripped 3 Reduce temperat
40. e to the technician prior to service or maintenance CONTENTS ZG ZCS ue 2 Cua Cue Du uiae Et 5 OO MAD P 2 KMD nt trade best GOW 6 tus rie c U rosak chao Gierak ssd 7 4 KMD S0OMAM seca PC GSG A 8 BOON AS od 9 SN umts OG TTE PUR URN 10 Te Condensing dU 11 d 9p ner 11 IE uir limes o Rm 13 DG ONS RIG S 13 EB sterio snp MNT P 13 SOTA TET 14 SMDSZOONIF EMT T 15 eco a oC 16 Ed ess enin M oe EE az 17 PR lp ak Rr wa 18 2 AC BOA 19 SONG Stat GG Gaia 19 D Controller B awa czowe ai aaa Od O 19 TCA 23 d Controls and AdjUSIMEN S aa aawouwutawwc 26 Checking the Controller Board ud meae 30 2 Mechanical Ib COMTO Isinen a O ZOZ 31 Proximity SWIEODI ok oko io aba uasa oxi 31 b Explanation ot ODBFANIONE sasuke nra A subnet Rani CY aU 31 lel Troubleshooting CON 32 Ill Technical Rm 33 1 Water Circuit Eg 33 a KMD 700MAH and KMD 900MAH 244
41. efrost include drain 1 Thermistor Temperature 13 ON 2 Float Switch Lj ON S om OFF A 4 Heater ge Control FO NNN Switch in Icemakin WASH 5 Pump Motor oF NI Drain LZ 2 1 7 Fan Motor ON Condenser Unit ON Water Valve m 2 Hot Gas Valve Note 1 The pump motor waits for 2 seconds before starting a drain cycle See II 2 d Controls and Adjustments 2 The icemaker does not complete a defrost cycle in the first 2 or 3 minutes See 2 d Controls and Adjustments 8 The bin control will only shut off the ice machine during the first 5 minutes of the freeze cycle 45 4 Performance Data a KMD 700MAH APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR gal day FREEZING CYCLE TIME HARVEST CYCLE TIME HEAD PRESSURE kg cm G SUCTION PRESSURE PSIG kg cm G TOTAL HEAT OF REJECTION FROM CONDENSER AMBIENT TEMP WATER TEMP F C FEG 50 10 70 21 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 38 593 536 483 432 310 257 180 159 293 316 346 360 51 58 60 90 32 1606 1643 1653 1710 21 24 26 28 2 0
42. ent this type of failure the controller board checks the position of the float switch at the end of the initial one minute water fill cycle and at the end of each defrost cycle If the float switch is in the up position electrical circuit closed the controller board changes to the ice making cycle If the float switch is in the down position electrical circuit open the controller board changes to a one minute water fill cycle before starting the ice making cycle This method allows for a low water safety shut down to protect the water pump from mechanical seal failure For water cooled model if the water is shut off the unit is protected by the high pressure switch 5 High Voltage Cutout The maximum allowable supply voltage of this icemaker is limited by the high voltage cutout If miswiring especially on single phase 3 wire models causes excessive voltage on the controller board the high voltage cutout shuts down the circuit in 3 seconds and the icemaker automatically stops When the proper supply voltage is resumed the icemaker automatically starts running again The control board will signal this problem using 7 beeps every 3 seconds 6 LED Lights and Audible Alarm Safeties The red LED indicates proper control voltage and will remain on unless a control voltage problem occurs At startup a 5 second delay occurs while the board conducts an internal timer check A short beep occurs when the power switch is turned ON or OFF 20
43. er LED Lights up when power is supplied to the Board 2 3 4 Transformer Connector xc Relays are energized Control Products HOS 001A Board 22 Defrost Control Thermistor Microprocessor Will indicate Board revision level on attached label last 2 digits Connector K5 black Float Switch Switch for Board Indicate which and ALPINE Board Service Boards only Part Number Connector K1 Pins 1 through 10 1 9 Magnetic Contactor Hot Gas Valve Line Valve Pump Motor icemaking Pump Motor drain Water Valve Power line Bin Control Open c Sequence 1st Cycle 1 Unit energized and control switch to ICE 3 Thermistor reads 48 F position Water supply cycle starts Defrost timer starts counting 2 After 1 minute defrost cycle starts WATER VALVE WATER VALVE HOT GAS VALVE FREEZE PUMP amp FAN amp LINE VALVE 5 After first 5 minutes in freeze cycle cycle can complete when float switch circuit opens 4 Defrost timer stops counting Defrost cycle is completed and freeze cycle starts If bin control signals that bin is full within first 5 minutes in freeze cycle the machine will shut down IMPORTANT 1 Board never accepts defrost completion signal within the first 2 minutes in defrost cycle IMPORTANT Board never accepts freeze completion signal from float switch wi
44. frigerant access valves one on the low side and one on the high side line Using proper refrigerant practices recover the refrigerant from the access valves and store it in an approved container Do not discharge the refrigerant into the atmosphere b Evacuation and Recharge R 404A 1 Attach charging hoses a service manifold and a vacuum pump to the system Be sure to connect charging hoses to both high and low side access valves IMPORTANT The vacuum level and vacuum pump may be the same as those for current refrigerants However the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for POE oils 2 Turn on the vacuum pump Never allow the oil in the vacuum pump to flow backward 3 Allow the vacuum pump to pull down to a 29 9 Hg vacuum Evacuating period depends on pump capacity 4 Close the low side valve and high side valve on the service manifold 57 5 Disconnect the vacuum pump and attach a refrigerant service cylinder to the high side line Remember to loosen the connection and purge the air from the hose See the nameplate for the required refrigerant charge Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No 700 88 be used 6 A liquid charge is recommended for charging an R 404A system Invert the service cylinder Open the high side service manifold valve 7 Allow the system to charge with liquid until
45. frigerant and store it in an approved container 5 Disconnect the capillary tube at the condenser outlet using brazing equipment 6 Disconnect the flare connections of the valve 7 Remove the screws and the valve from the bracket 8 Install the new valve and braze the capillary tube 9 Install the new drier 10 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 11 Evacuate the system and charge it with refrigerant See the nameplate for the required refrigerant charge 12 Connect the flare connections 13 Open the water supply line shut off valve 14 Check for water leaks 15 Replace the panels in their correct positions 16 Turn on the power supply 65 9 Adjustment of Water Regulating Valve Water Cooled Model Only The water regulating valve also called water regulator is factory adjusted No adjust ment is required under normal use Adjust the water regulator if necessary using the following procedures 1 Attach a pressure gauge to the high side line of the system Or prepare a thermometer to check for the condenser drain temperature 2 Rotate the adjustment screw by using a flat blade screwdriver so that the pressure gauge shows 270 PSIG or the thermometer reads 104 115 F 5 minutes after a freeze cycle or icemaking process starts When the pressure exceeds 270 PSIG or the condenser drain temperature exceeds 115 F rotate the adjustment screw coun terclockwise See Fig 1 3 Chec
46. frigeration system is opened Do not replace the drier until after all other repair or replacement has been made Note When replacing a compressor with a defective winding be sure to install the new start capacitor and start relay supplied with the replacement compressor Due to the ability of the POE oil in the compressor to absorb moisture quickly the compressor must not be opened more than 15 minutes for replacement or service Do not mix lubricants of different compressors even if both are charged with R 404A except when they use the same lubricant 1 Turn off the power supply 2 Remove the panels 3 Recover the refrigerant and store it in an approved container 4 Remove the terminal cover on the compressor and disconnect the compressor wiring 5 Remove the discharge and suction pipes using brazing equipment 6 Remove the hold down bolts washers and rubber grommets 7 Slide and remove the compressor Unpack the new compressor package Install the new compressor 8 Attach the rubber grommets of the prior compressor 9 Sandpaper the Suction Discharge and Process Pipes 10 Place the compressor in position and secure it using the bolts and washers 11 Remove plugs from the suction discharge and process pipes 12 Braze the process suction and discharge lines do not change this order while purging with nitrogen gas flowing at a pressure of 3 4 PSIG 13 Install the new filter drier 59 15 Evacuate the sys
47. hree more times to rinse thoroughly Note If you do not sanitize the icemaker go to step 10 in b Sanitizing Procedure 78 b Sanitizing Procedure Following Cleaning Procedure 1 Dilute a 5 25 sodium hypochlorite solution chlorine bleach with water Add approxi mately 1 25 fl oz to 2 5 gal of water 2 Remove the insulation panel by removing thumbscrew lifting up the panel slightly and pulling it toward you 3 Pour the sanitizing solution into the water tank 4 Replace the insulation panel and the front panel in their correct positions Note Make sure that the control switch is in the WASH position and the cleaning valve is open 5 Turn on the power supply and start the sanitizing process 6 Turn off the power supply after 15 minutes 7 Remove the front panel 8 Remove the insulation panel by removing thumbscrew lifting up the panel slightly and pulling ittoward you Remove cube guide B by removing thumbscrew Remove cube guide A Remove overflow cap overflow pipe and water shield 9 Remove the drain plug located inside the water tank Drain the water tank Replace the drain plug in its correct position 10 Replace water shield overflow pipe overflow cap cube guide A cube guide B and insulation panel in their correct positions 11 Repeat the above steps 16 through 29 in a Cleaning Procedure two times to rinse thoroughly 12 Close the cleaning valve 13 Move the contro
48. humbscrew Remove cube guide A Remove overflow cap overflow pipe and water shield 14 Remove the drain plug located inside the water tank Drain the water tank Replace the drain plug in its correct position 15 Replace water shield overflow pipe overflow cap cube guide A cube guide B and insulation panel in their correct positions 16 Move the control switch to the ICE position 17 Close the cleaning valve 18 Replace the front panel in its correct position 77 19 Turn on the power supply to fill the water tank with water 20 Turn off the power supply after 3 minutes 21 Remove the front panel and fully open the cleaning valve 22 Move the control switch to the WASH position 23 Replace the front panel in its correct position 24 Turn on the power supply to rinse off the cleaning solution 25 Turn off the power supply after 5 minutes 26 Remove the front panel 27 Remove the insulation panel by removing thumbscrew lifting up the panel slightly and pulling it toward you Remove cube guide B by removing thumbscrew Remove cube guide A Remove overflow cap overflow pipe and water shield 28 Remove the drain plug located inside the water tank Drain the water tank Replace the drain plug in its correct position 29 Replace water shield overflow pipe overflow cap cube guide A cube guide B and insulation panel in their correct positions 30 Repeat the above steps 16 through 29 t
49. ith the power supply on Red LED will turn off if voltage protection operates The voltage safety automatically resets when voltage is corrected Low Voltage 92Vac or less High Voltage control voltage gt 147Vac 5 The Output Test switch S3 provides a relay sequence test With power OFF place S3 ON and switch power to ICE The correct lighting sequence should be none 2 3 4 1 amp 4 normal sequence every 5 seconds The LEDs are not in numerical order on the board See the diagram on the next page for the location and numbering of LEDs S3 should remain in the OFF position for normal operation 21 The application switch located between relay X3 amp X4 must be set to match the original board application Place this switch in the ALP position if there is no white wire supplied to the K1 connector If there is a white wire place the switch in the C position If this switch is placed in the wrong position either the compressor contactor will remain energized with the control switch OFF or the unit will not start The dip switches should be adjusted per the adjustment chart published in the Tech Specs book Number 8 must remain in the OFF position Output Test Switch Used to test Relays on Board Dip Switch Alarm Reset Switch 0008810 OUTPUT TEST Backup Freeze Timer LED 61 00 60 10 SO Backup Defrost Timer LED Alarm Buzzer Pow
50. k that the pressure or the condenser drain temperature holds a stable setting ADJUSTMENT SCREW ADJUSTMENT SCREW CW Higher CCW Lower 9 6 Top View Fig 1 66 10 Removal and Replacement of Condensing Pressure Regulator C P R Remote Air Cooled Model Only IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Turn off the power supply 2 Remove the panels from the remote condenser unit 3 Recover the refrigerant and store it in an approved container 4 Before heating break off the stub on the dome to release the dome charge 5 Disconnect the C P R using brazing equipment 6 Install the new C P R Use nitrogen gas at a pressure of 3 4 PSIG when brazing the WARNING Always protect the C P R body by using a damp cloth to prevent the C P R from overheating Do not braze with the C P R body exceeding 250 F 7 Install the new drier in the icemaker 8 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 9 Evacuate the system and charge it with refrigerant See the charge label in the machine compartment in the icemaker 10 Replace the panels in their correct positions 11 Turn on the power supply 67 11 Removal and Replacement of Thermistor CAUTION 1 Fragile handle very carefully 2 Always use a recommended sealant
51. l switch to the ICE position 14 Replace the front panel in its correct position 15 Clean the storage bin dispenser unit with water 16 Turn on the power supply and start the automatic icemaking process 79 3 Maintenance IMPORTANT This icemaker must be maintained individually referring to the instruction manual and labels provided with the icemaker 1 Stainless Steel Exterior To prevent corrosion wipe the exterior occasionally with a clean soft cloth Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up 2 Storage Bin and Scoop e Wash your hands before removing ice Use the plastic scoop provided bin accessory e The storage bin dispenser unit is for ice use only Do not store anything else in the bin dispenser e Keep the scoop clean Clean it by using a neutral cleaner and rinse thoroughly e Clean the bin dispenser liner by using a neutral cleaner Rinse thoroughly after cleaning 3 Air Filter air cooled models only A plastic mesh air filter removes dirt or dust from the air and keeps the condenser from getting clogged As the filter gets clogged the icemaker s performance will be reduced Check the filter at least twice a month When clogged use warm water and a neutral cleaner to wash the filter 4 Condenser except water cooled models Check the condenser once a year and clean if required by using a brush or vacuum cleaner More frequent cleaning may be re
52. lines otherwise performance may be reduced 62 IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Turn off the power supply 2 Remove the panels 3 Recover the refrigerant and store it in an approved container 4 Remove the screw and the solenoid 5 Disconnect the hot gas valve or line valve using brazing equipment 6 Install the new valve WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating Do not braze with the valve body exceeding 250 F 7 Install the new drier 8 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 9 Evacuate the system and charge it with refrigerant For air cooled and water cooled models see the nameplate for the required refrigerant charge For remote air cooled models see the charge label in the machine compartment 10 Cut the leads of the solenoid allowing enough lead length to reconnect using closed end connectors 11 Connect the new solenoid leads 12 Attach the solenoid to the valve body and secure it with a screw 13 Replace the panels in their correct positions 14 Turn on the power supply 63 7 Removal and Replacement of Evaporator IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all o
53. nutes in defrost cycle 2 Defrost cycle time is limited to 20 minutes even if defrost timer does not stop counting 24 2nd Cycle and after with no pump drain IMPORTANT Freeze cycle time is limited to 60 minutes even if float switch does not open 1 Float switch opens and signals to complete 2 Thermistor reads 48 F freeze cycle Defrost timer starts counting WATER VALVE d DEFROST CYCLE 2 IMPORTANT Water valve opening is limited to 6 minutes PUMP amp FAN amp LINE VALVE After first 5 minutes in freeze cycle cycle can complete when float switch circuit opens 3 Defrost timer stops counting If bin control signals that bin is full within first Defrost cycle is completed and freeze cycle 5 minutes in freeze cycle the machine will shut starts down IMPORTANT 1 Board never accepts defrost completion signal within the first 2 minutes in defrost cycle IMPORTANT Board never accepts freeze completion signal from float switch within first 5 minutes in freeze cycle 2 Defrost cycle time is limited to 20 minutes even if defrost timer does not stop counting If bin control signals that bin is full after first 5 minutes in freeze cycle board will allow machine to complete freeze cycle and following harvest cycle 25 d Controls and Adjustments The Dip Switch is factory adjusted to the following position
54. place the panels in their correct positions 8 Turn on the power supply 71 16 Removal and Replacement of Bin Control 1 Turn off the power supply 2 Remove the front panel and top panel 3 Remove the two thumbscrews securing the switch cover 4 Lift the bin control assembly out of the icemaker 5 Lift off the insulation then remove the two thumbscrews attaching the bin control to the switch cover 6 Use the thumbscrews to attach the new bin control to the switch cover 7 Replace the removed parts in the reverse order of which they were removed Thumbscrews Switch Cover Insulation Bin Control 72 VI Cleaning and Maintenance Instructions 1 Preparing Icemaker for Long Storage IMPORTANT When shutting off the icemaker for an extended time drain out all water from the water line and remove the ice from the storage bin The storage bin should be cleaned and dried Drain the icemaker to prevent damage to the water supply line at sub freezing temperatures using a foot or hand pump Shut off the icemaker until the proper ambient temperature is resumed When the icemaker is not used for two or three days it is sufficient to only move the control switch to the OFF position unless the icemaker will be at sub freezing temperatures 1 On water cooled models only first remove the water from the water cooled condenser 1 Remove the front panel 2 Move the control switch on the con
55. quired depending on the location of the icemaker 80
56. rse order of which they were removed 9 Open the water supply line shut off valve 10 Turn on the power supply 11 Check for leaks 12 Replace the front panel in its correct position 14 Removal and Replacement of Pump Motor 1 Turn off the power supply 2 Remove the front panel 3 Remove the base cover 4 Drain the water tank by removing one end of the pump tubing 5 Replace the removed parts in their correct positions 6 Disconnect the pump suction and discharge hoses 7 Remove the screws and the pump motor bracket 70 8 Remove the closed end connectors from the pump motor leads 9 Remove the two screws and the pump motor bracket 10 Remove the pump housing and check the impeller 11 If the impeller is defective install a new impeller 12 Install the new motor or new parts and replace the removed parts in the reverse order of which they were removed 13 Turn on the power supply and check for leaks 14 Replace the base cover 15 Replace the front panel in its correct position 15 Removal and Replacement of Spray Tubes 1 Turn off the power supply 2 Remove the front panel and the insulation panel 3 Remove the rubber hoses from the spray tubes water supply pipe 4 Release the clamps and disconnect the rubber hoses 5 Remove the spray tubes by squeezing the side tabs 6 Install the new spray tubes and replace the removed parts in the reverse order of which they were removed 7 Re
57. s DIPSWICH 1 2 9 4 5 6 7 8 9 10 pas o l SRS JE JS WA KMD 700MAH MD 00MWH ON OFF OFF ON JON OFF MD 700MRH OFF Switch Nos 1 and 2 Used for adjustment of the defrost timer Thedefrosttimerstarts counting when the thermistor reads a certain temperature at the evaporator outlet Switch Nos 3 and 4 Used for adjustment of the drain timer When a freeze cycle is completed the pump motor stops and the icemaker resumes operation in 2 seconds Then the pump motor drains the water tank for the time determined by the drain timer The drain timer also determines the time to restrain completion of a defrost cycle i e the minimum defrost time Switch Nos 5 and 6 Used for adjustment of the drain counter The pump motor drains the water tank at the frequency determined by the drain counter Switch No 7 Used only on models with mechanical bin control Dip switch should be set ON Models with bin thermostat switch no 7 should be set in the OFF position Switch No 8 Used only for checking the controller board Usually set in OFF position Freeze Timer Control Board Switch Nos 9 and 10 Used for adjustment of freeze timer Check only rn gt Mechanical Bin Control The freeze timer determines maximum Drain Counter cam freeze cycle time Upon termination of Drain Timer freeze timer machine initiates the h
58. s into bin See chart 1 5 and check water supply line water solenoid valve water system pump motor and controller board SEKCIE 2 Cloudy or irregular a See chart 2 1 and 2 3 and check float switch water solenoid valve controller cubes board spray tubes water system refrigerant charge and expansion valve c Water Quality 1 High hardness or contains 1 Install a water softener or impurities filter 5 Other 1 Icemaker will not a Bin Control 1 II 3 c stop when bin is filled Troubleshooting with ice 2 Fan blade deformed 2 Replace fan blade 3 Fan blade does not move 3 Replace freely c Compressor 1 Bearings worn out or 1 Replace cylinder valve broken 2 Mounting pad out of 2 Reinstall position d Refrigerant Lines 1 Rub or touch other lines or 1 Replace surfaces 3 Ice in storage bin a Bin Drain 1 Plugged 1 Clean often melts 56 V Removal and Replacement of Components IMPORTANT 1 The Polyol Ester POE oils used in R 404A units can absorb moisture quickly Therefore it is important to prevent moisture from entering the system when replacing or servicing parts 2 Always install a new filter drier every time the sealed refrigeration system is opened 3 Do not leave the system open for longer than 5 minutes when replacing or servicing parts 1 Service for Refrigerant Lines a Refrigerant Recovery The icemaker unit is provided with two re
59. t marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 lbs WATER gal 24HR gal 100 Ibs EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY DRAIN CUBE CONTROL SYSTEM HARVESTING CONTROL SYSTEM ICE MAKING WATER CONTROL COOLING WATER CONTROL BIN CONTROL SYSTEM COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE P C BOARD CIRCUIT PROTECTION COMPRESSOR PROTECTION REFRIGERANT CIRCUIT PROTECTION LOW WATER PROTECTION ACCESSORIES SUPPLIED REQUIRED OPERATING CONDITIONS 208 230 60 1 3 wire with neutral for 115V 14 A 5 Min Freeze 104 F WT 80 F 14 65A 25A Ambient WATER TEMP F Temp F 50 70 9 70 906 411 878 398 814 369 80 885 401 842 382 763 346 90 878 398 812 368 737 335 100 857 389 795 360 669 303 Crescent Cube 9 6 Ibs 4 4 kg 624 pcs N A 90 70 F 70 50 F 2220 6 6 2075 5 9 266 33 4 465 53 1 30 x 24 6 x 28 762 x 625 x 713 mm Stainless Steel Galvanized Steel Rear Net 226 Ibs 103 kg Shipping 258 Ibs 117 kg Permanent Connection Inlet 1 2 FPT Outlet 3 4 FPT 5 8 OD Tube Float Switch Hot Gas and Water Thermistor and Timer Timer Controlled Overflow Pipe N A Mechanical Level Switch and Timer Hermetic Model CS14K6E PFV 279 Air Cooled Remote Condenser Unit U
60. t off check the resistance values of the resistor wire harness You should read approximately 15 8 KQ between the black terminal and the red terminal that connect to the K4 connector on the controller board when the lever is in the bin full position far right If this reads approximately 7 9 KQ the resistors may be miswired Switch the black and white wires in the terminal housing or order a replacement wire harness b If the preceding steps do not resolve the problem replace the bin control assembly 32 Technical Information 1 Water Circuit and Refrigerant Circuit a KMD 700MAH and KMD 900MAH Spray Tubes Condenser Water High Pressure LJILLLLLLLLILLLL Switch Water sm Suppl 154 C Cleaning Thermistor Valve j Insulation Seana Suction U j Hot Gas Valve Discharge Line Refrigerant Expansion Valve me Water Circuit Drain Valve Note KMD 900M_H models have two expansion valves 33 b KMD 700MWH and KMD 900MWH Water Regulating Valve Condenser a Drains OWE a Spray Tubes A alt ili Water Supply Water Supply o Insulation Strainer Suction High Pressure Evaporator Switch Cleaning f Thermistor Drier M Valve Switch Hot Gas Valve Discharge Line Refrigerant Expansion Valve me Water Circuit Drain Valve
61. te water supply cycle the defrost cycle starts Reconnect a 1 5 kQ 3 5 kQ resistor to the connector K3 pins 1 and 2 after the first 2 minutes of the defrost cycle The unit should start the freeze cycle after 1 minute 5 seconds from the resistor connection 3 Check the controller board by using test program of the controller board The output test switch S3 provides a relay sequence test With power OFF place S3 on and switch power to ICE The correct lighting sequence should be none 2 3 4 1 and 4 normal sequence every 5 seconds S3 should remain in the OFF position for normal operation 30 3 Mechanical Bin Control a Proximity Switch 1 This machine uses a lever actuated proximity switch hereafter called mechanical bin control to control the ice level in the storage bin b Explanation of Operation 1 The startup and shutdown of the ice machine is controlled via the controller board Dip switch number 7 must be in the ON position for the controller board to receive input from the bin control i The controller board receives a resistance value input via the red K4 connector from the bin control A resistor wire harness is connected from the bin control to the controller board ii When the bin control is activated in the bin full position pushed to the right a 15 8 KQ signal will be sent to the control board to shut down the unit iii When the bin control is in the normal position
62. tem and charge it with refrigerant For air cooled and water cooled models see the nameplate for the required refrigerant charge For remote air cooled models see the charge label in the machine compartment 16 Connect the terminals and replace the terminal cover in its correct position 17 Replace the panels in their correct positions 18 Turn on the power supply 60 4 Removal and Replacement of Drier IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Turn off the power supply 2 Remove the panels 3 Recover the refrigerant and store it in an approved container 4 Remove the drier 5 Install the new drier with the arrow on the drier in the direction of the refrigerant flow Use nitrogen gas at the pressure of 3 4 PSIG when brazing the tubings 6 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 7 Evacuate the system and charge it with refrigerant For air cooled and water cooled models see the nameplate for the required refrigerant charge For remote air cooled models see the charge label in the machine compartment 8 Replace the panels in their correct positions 9 Turn on the power supply 5 Removal and Replacement of Expansion Valve IMPORTANT Sometimes moisture in the refrigerant circuit exceeds the drier capacity and freezes up at the expansion
63. ther repairs or replacement have been made 1 Turn off the power supply 2 Remove the panels and the top insulation over the evaporator 3 Recover the refrigerant and store it in an approved container 4 Remove the spray tubes and the insulations at the U shaped notch where the refrigeration tubings go through the molded chassis 5 Remove the insulation tube and disconnect the evaporator inlet tubing at the tee next to the expansion valve 6 Lift up the evaporator and disconnect the evaporator outlet tubing 7 Install the new evaporator 8 Install the new drier 9 Check for leaks using nitrogen gas 140 PSIG and soap bubbles 10 Evacuate the system and charge it with refrigerant For air cooled and water cooled models see the nameplate for the required refrigerant charge For remote air cooled models see the charge label in the machine compartment 11 Replace the removed parts in the reverse order of which they were removed 12 Replace the top insulation and the panels in their correct positions 13 Turn on the power supply 64 8 Removal and Replacement of Water Regulating Valve Water Cooled Model Only IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Turn off the power supply 2 Close the water supply line shut off valve 3 Remove the panels 4 Recover the re
64. thin first 5 minutes in freeze cycle 2 Defrost cycle time is limited to 20 minutes e even if defrost timer does not stop counting If bin control signals that bin is full after first 5 minutes in freeze cycle board will allow machine to complete freeze cycle and following harvest cycle 23 2nd Cycle and after with pump drain IMPORTANT Freeze cycle time is limited to 60 minutes even if float switch does not open Float switch opens and signals to complete freeze cycle Drain timer starts counting After first 5 minutes in freeze cycle cycle can complete when float switch circuit opens If bin control signals that bin is full within first 5 minutes in freeze cycle the machine will shut down IMPORTANT Board never accepts freeze completion signal from float switch within first 5 minutes in freeze cycle If bin control signals that bin is full after first 5 minutes in freeze cycle board will allow machine to complete freeze cycle and following harvest cycle DRAIN PUMP HOT GAS VALVE DEFROST 2 Drain timer stops counting Pump drain is completed 3 Thermistor reads 48 F Defrost timer starts counting IMPORTANT Water valve opening is limited to 6 4 Defrost timer stops counting Defrost cycle is completed and freeze cycle starts IMPORTANT 1 Board never accepts defrost completion signal within the first 2 mi
65. trol box to the OFF position 3 Wait 3 minutes 4 Move the control switch to the ICE position 5 Allow 5 minutes for the icemaker to fill with water and the water pump to start operating 6 Close the water cooled condenser water supply line shut off valve 7 Open the drain valve for the water cooled condenser water supply line 8 Allow the line to drain by gravity 9 Attach compressed air or carbon dioxide supply to the condenser water line drain valve 10 Blow the water cooled condenser out using compressed air or carbon dioxide until water stops coming out 73 2 Remove the water from the potable water supply line 1 Remove the front panel Except water cooled models 2 Move the control switch on the control box to the OFF position 3 Wait 3 minutes 4 Close the potable water supply line shut off valve and open the potable water supply line drain valve 5 Allow the line to drain by gravity 6 Attach compressed air or carbon dioxide supply to the potable water line drain valve 7 Move the control switch to the ICE position 8 Quickly blow the potable water line out using compressed air or carbon dioxide 3 Drain the potable water tank 1 Turn off the power supply 2 Move the control switch on the control box to the OFF position 3 Remove the insulation panel by removing thumbscrew lifting up the panel slightly and pulling it toward you Remove cube guide B by removing thum
66. ure h Controller Board Defective See 2 Checking the Controller Board Water Regulator Water 1 Set too high 1 Adjust lower cooled model only 3 Continued from previous page 4 Water continues to be supplied in freeze cycle 5 No water comes from spray tubes Water pump will not start or freeze cycle time is too short 6 Fan Motor will not start or is not operating 7 All components run but no ice is produced Discharge Temp Switch meme Refrigerant undercharged 1 Recharge 2 Cooling fan not operating 2 Eu chart 1 6 a Water Solenoid Valve 1 Diaphragm does not close 1 Check for water leaks with icemaker off b Controller Board 1 Defective 1 See 2 Checking the Controller Board a Water Supply Line b Water Solenoid Valve c Water System d Pump Motor 1 Water pressure too low 1 Check and get and water level in water recommended pressure tank too low 1 Dirty mesh filter or orifice and water level in water tank too low 1 Water leaks 1 Check connections for water leaks and replace 2 Clogged 1 Motor winding opened 1 Replace 2 Bearing 2 Replace 3 Wiring to pump motor 3 Check for loose connection or open and replace 4 Defective capacitor 4 Replace 5 Defective or bound 5 Replace and clean impeller 6 Mechanical seal worn out 6 Check and replace Controller Board Defe

Hoshizaki HOSHIZAKI KMD-900MAH User's Manual

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