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1. Receiver Tank Control Switch Drier Float Switch Drain Valve Liquid Line Valve Water Pump VZ 2 Compressor Cleaning Valve y M i Thermostatic 1 6 Expansion le A Valves AZAN 4 ZA N Bin Control 14 3b Remote Air Cooled Auxiliary Code C 1 and Later Inlet Water Valve Spray Tubes Water Supply Inlet jal Il Wl i g el 1 l q EP al Bu Float Switch Drain Valve Water Pump Drier Cleaning Valve Compressor Thermostatic P Expansion Valves Hot Gas Valve Main Transformer Junction Boxes Control Box Receiver Tank Control Switch Liquid Line Valve B Sequence of Operation The steps in the sequence are as outlined below When power is supplied the red POWER OK LED and the green BC CLOSED LED on the control board come on If the yellow BC OPEN LED is on the unit will not start In this case clear ice away from the bin control actuator A 5 second delay occurs at startup Note that the order of the green sequence LEDs from the outer edge of the board is 1 4 3
2. 99129 i Go i Pl go Lo 9o i 60 Olo to Zo Lo MS 17015 to 1 T Zo Lo to g g El co Lo YOLSINYSHL QuvOg S3TIONINO H UW 109 NIG VOL 391 ug YA KO EE T Union 5 dv 1715 D olo EL AG 403 HIN H e 09 0 2 1 JLLJNDVN v aN9 2 802 33 1b KMD 850MRH Auxiliary Code C 0 and Earlier 0194 214 22 0194 2017 YMS eJnssaJg MOTBA A JOA A 3116 yava nga oer ER T LINN 939N30N02 310434 E 3SVIXNVD NI AVAD A oe 1 1 r i ALL 1 AS OL 909 EC 21 L yOV1E ya jndino ablz YA ALIHM M 4 8 2 9 MOUG da 1 MS 1 3002 40103 34M c gw ka 4 lac MEE un 2 Df AWA AAA 4 AWA ANA 1 PE S OLOH 347 Vu USLVM d L ik ya R o o ER E Loo oi ell o S col ya E EE
3. 3 Freeze Cycle LED 1 is on Comp FMR and PM continue to run FMS energizes LLV opens HGV closes and the freeze cycle starts For the first 5 minutes the control board will not accept a signal from F S This 5 minute minimum freeze acts as a short cycle protection At the end of 5 minutes F S assumes control As ice builds on the evaporator the water level in the sump lowers The freeze continues until F S opens and terminates ice production 4 Pump Out Cycle LEDs 1 4 3 and 2 are on With S4 dip switch 5 and 6 in the factory default position the 1st pump out occurs after the 11th freeze cycle and every 10th cycle thereafter Comp and FMR continue to run DV and WV open HGV opens LLV closes and FMS de energizes PM stops for 2 seconds SR energizes restarting PM and taking water from the sump and forcing it to go through DV and down the drain At the same time water flows through the vent tube to power flush the F S After 10 seconds the pump out is complete The pump out frequency control 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 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 5 or 10 cycles S4 dip switch 5 amp 6 For details see II C 3 d Pump Out Frequency Control 5 Normal Harvest Cycle LEDs 1 4 and 2 are
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5. 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 netrual for 115V 9 8A 5 Min Freeze AT 104 F WT 80 F 20A WATER TEMP F 50 70 90 833 378 793 360 738 335 803 364 741 336 686 311 793 360 698 317 641 291 782 355 685 311 589 267 Crescent Cube 11 6 Ibs 5 3 kg 624pcs N A 90 70 F 70 50 F 1570 5 4 1490 4 3 136 19 5 280 33 6 2 YES 30 x 24 5 8 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 Lever Switch and Timer Hermetic Model CSO8KQE PFV 255 Air Cooled Remote Condenser Unit URC 9F Vertical type Stainless Steel and Copper Thermostatic Expansion Valve Condensing Pressure Regulator on URC 9F R404A 9 Ibs 4 2 oz 4200g Icemaker 5 Ibs 5 4 oz Cond Unit 3 Ibs 14 8 oz High 467PSIG Low 230PSIG High Voltage Cut out Internal Auto reset Overload Protector Int
6. Freeze Cycle 1 Comp PM 15 minutes freeze timer 130 to 35 minutes FMR FMS setting LLV Pump Out Cycle 1 4 3 and Comp HGV 10 seconds 10 seconds 10 seconds 2 SR PM DV For proper operation the pump out timer must remain in the factory default position The built in safeties shut down the unit and have alarms as listed below No of Beeps every 3 sec Type of Alarm 1 High Evaporator Temp Check for harvest problem stuck HGV or temperature gt 127 F relay hot water entering unit stuck HM or 53 C shorted thermistor Harvest Backup Timer Check for open thermistor HGV not opening harvest 20 min for two TXV leaking by low charge or inefficient cycles in a row Comp 3 Freeze Timer Check for F S stuck closed up WV leaking by freeze gt specified setting HGV leaking by TXV not feeding properly low for two cycles in a row charge HM not bypassing or inefficient Comp Timer is factory set using S4 dip switch 9 amp 10 To reset the above safeties press the ALARM RESET button with the power supply on Low Voltage Red LED will turn off if voltage protection 92Vac 5 or less operates High Voltage The control voltage safeties automatically reset Legend Comp compressor DV Drain Valve FMR remote fan motor FMS self contained fan motor F S float switch HGV hot gas valve HM headmaster C P R LLV liquid line valve PM pump motor SR service relay WV inlet water val
7. m nga felek OM Bree aomas 2 H iL wv ONG Ho A Ce 6o o 0lo4 1 s 0002 5 Gi wi MS 1907 i o She a ol siis bs le 221 L dy LVLS 5 zo iuis do EE DAME S 5 1041N02 NIB q g g olo 9 LIL EL AGH 303 TVYLNSN H M e VOL 5 09 062 802 for 4OLSINNSH JSN M012Y1N02 JILANOVN T o ya V QVO ol WA 2 HET OH NO2 34 0154 ELZFLZE 0154 LZ v8c 0154 12 42 uno KE 0194 eiztcly 9po N 1 DIS 12 88 pajoo2 ie1eM aJnssaJg I PON Pajoog ly 35 850MAH and KMD 850MRH Auxiliary Code C 1 and Later KMD 2 KMD 850MWH Auxiliary Code C 2 and Later T JLIH 1301 o oo Don n l adada NI HANWOSS QW I HW G8 C b UNDER QD pue HvWOS8 CW 2 Ve paeog 0 1402 OL 440 440 1440 440 1440 H MY 440 330 440 44 330 OGS OWYI N334 27 lenn N JI 3n18 otv 1 H NA EIERE nn 14 13 EEN Aejay 135 HOLIN 11138 H31 3905 40105 Zai Jessie et
8. too long defective switch 2 Float does not move 2 Clean or replace freely b Inlet Water Valve 1 Diaphragm does not 1 Check for water leaks with close icemaker off c Control Board 1 Defective 1 See II C 4 Control Board Check Procedure d Water Pump 1 RPM too slow 1 Check and replace e Spray Tubes 1 Clogged 1 Unclog f Evaporator 1 Scaled up 1 Clean g Thermostatic 1 Operating erratically 1 Check and replace Expansion Valve 2 All ice formed on 1 Scaled up 1 Clean evaporator does not b water Supply Line 1 Water pressure too 11 Check and get fall Za bin in harvest low recommended pressure cycle c Water Filter System 1 Dirty Restricted 1 Replace filter d Inlet Water Valve 1 Dirty mesh filter or 1 Clean orifice 2 Diaphragm does not 2 Check for water leaks with close icemaker off e Ambient and or water 11 Too cool 1 Increase temperature temperature 44 Possible Cause 2 All ice formed on f Liquid Line Valve 1 Continues to open in 1 Check operation in harvest evaporator does not if applicable harvest cycle cycle and replace fall into bin in harvest cycle continued g Thermistor 1 Out of position or 1 See V I Removal loose attachment and Replacement of Thermistor h Control Board 1 Harvest timer is set 1 Adjust longer referring too short to II C 3 Controls and Adjustments b Harvest Timer 2 Defective 2 See II C 4
9. 2 1 One Minute Fill Cycle LED 4 is on WV opens and the fill period begins After 1 minute the board checks for a closed F S If F S is closed the harvest cycle begins If not WV will remain energized through additional 1 minute cycles until water enters the sump and F S closes This serves as a low water safety to protect the water pump 2 Initial Harvest Cycle LEDs 1 4 and 2 are on WV remains open Comp FMR HGV energize The control board monitors the warming of the evaporator via the thermistor located on the suction line When the thermistor reaches 48 F 9 C the control board reads a 3 9 kO signal from the thermistor and turns harvest termination over to the adjustable harvest timer which is factory set for normal conditions The timer has settings of 60 90 120 and 180 seconds S4 dip switch 1 amp 2 For details see II C 3 b Harvest Timer When the harvest timer completes its countdown the harvest cycle is complete and the freeze cycle starts The minimum total time allowed by the board for a complete harvest cycle is 2 minutes WV is open during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds whichever is shorter LED 4 goes off when WV closes PM energizes and runs for the last 50 seconds of harvest LED 3 comes on when PM energizes At the end of harvest the control board checks the position of F S and proceeds to the freeze cycle if it is closed or calls for a 1 minute fill if it is open
10. 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 10 113 PSIG Note We reserve the right to make changes in specifications and design without prior notice 2 KMD 850MWH water cooled AC SUPPLY VOLTAGE 208 230 60 1 3 wire with netrual for 115V AMPERAGE 8 3A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day Reference without marks SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 12 1 Ibs 5 5 kg 624pcs APPROXIMATE STORAGE CAPACITY N A ELECTRIC amp WATER CONSUMPTION 90 70 F 70 50 F ELECTRIC W kVVH 100 Ibs 1390 4 1 1390 4 0 WATER gal 24HR gal 100 Ibs 165 20 2 298 35 7 WATER COOLED CONDENSER 1035 127 565 68 gal 24HR gal 100 Ibs CEC CEE TIER LEVEL 2 ENERGY STAR N A EXTERIOR DIMENSIONS WxDxH 30 x 24 5 8 x 28 762 x 625 x 713 mm EXTERIOR FINISH Stainless Steel Galvanized Steel Rear WEIGHT Net 217 Ibs 98 kg Shipping 249 Ibs 113 kg CONNECTIONS ELECTRIC Permanent Connection WATER SUPPLY Inlet 1 2 FPT Cond Inlet 1 2 FPT DRAIN Outlet 3 4 FPT Cond Outlet 3 8 FPT 5 8 OD Tube CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water Thermistor and Timer ICE MAK
11. 1 Drains not run 1 Separate the drain lines separately c Ice Cube Guide 1 Out of position 1 Place in position Circulated water falls into bin 46 V Refrigeration Circuit and Component Service Information IMPORTANT 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 HAZARD 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 no
12. Control Board Check Procedure 1 Replace 1 Clean or replace 1 Clean or replace 1 See II C 4 Control Board Check Procedure 1 Replace 2 Replace 3 Check for loose connection or open and replace 4 Replace 5 Check and replace 1 See II C 4 Control Board Check Procedure 1 Check for leaks and recharge 2 Replace drier and recharge 8 All components b Compressor 1 Defective valve 1 Replace run but no ice is produced continued c Hot Gas Valve 1 Continues to open in 1 Check and replace freeze cycle d Liquid Line Valve 1 Continues to close in 1 Check and replace if applicable freeze cycle e Inlet Water Valve 1 Water valve is wide 1 Check for water leaks with open during freeze icemaker off f Thermostatic 1 Operating erratically 1 Check and replace Expansion Valve g Headmaster C P R 1 Not operating properly 1 Replace headmaster remote air cooled and liquid line model temperature too warm h Water Supply Line Condenser water 1 Check and get water cooled model pressure too low or recommended pressure only off and high pressure control opens and closes frequently i Water Regulating Valve 1 Set too high 1 Adjust or replace See water cooled model V G Adjustment of Water Regulating Valve 2 Evaporator is Frozen Up Possible Cause 1 Freeze cycle time is a Float Switch 1 Leads short circuit or 1 Check and replace
13. Cut outs The maximum and minimum allowable supply voltages of this icemaker are limited by the high voltage and low voltage cut outs If miswiring especially on single phase 3 wire models causes excessive voltage 147Vac 5 or more on the control board the high voltage cut out shuts down the circuit in 3 seconds and the icemaker automatically stops The control board will signal this problem using 7 beeps every 3 seconds The icemaker also automatically stops in cases of insufficient voltage 92Vac 5 or less The control board will signal this problem using 6 beeps every 3 seconds When the proper supply voltage is resumed the icemaker automatically starts running again 21 f LED Lights and Audible Alarm Safeties The red LED indicates proper control voltage and will remain on unless a control voltage problem occurs At startup a 5 second delay occurs while the board conducts an internal timer check A beep occurs when the control switch is moved to the ICE position 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 board is 1 4 3 2 For more information see II B Sequence of Operation Sequence Ste LED 577 15 SE 1 Minute Fill Cycle f4 0 Iw Jop Seconds Harvest Cycle 1 4 and2 VVV HGV 12 minutes 120 minutes 13 to 5 minutes Last 50 seconds of harvest WV de energizes and PM energizes LEDs 1 3 and 2 are on
14. board must be pressed with power on to reset either of these safeties c High Temperature Safety The temperature of the suction line in the refrigeration circuit is limited by the high temperature safety This protects the unit from excessively high temperatures If the evaporator temperature rises above 127 7 F 53 4 C the control board reads a 804 kO signal from the thermistor and operates the safety This shuts down the circuit and the icemaker automatically stops The control board will signal this problem using 1 beep every 3 seconds The ALARM RESET button on the control board must be pressed with power on to reset the safety d Low Water Safety The control 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 harvest cycle If the float switch is in the up position electrical circuit closed the control board changes to the ice making cycle If the float switch is in the down position electrical circuit open the control board changes to additional one minute water fill cycles until water enters the sump and the float switch closes When the float switch closes the control board changes to the ice making cycle The unit will not start without adequate water in the sump This serves as a low water safety to protect the water pump For water cooled model if the water is shut off the unit is protected by the high pressure switch e High Voltage and Low Voltage
15. icemaker is serviced or maintenance operations are performed Only qualified service technicians should install service and maintain the icemaker Read the warnings contained in this booklet carefully as they give important information regarding safety Please retain this booklet for any further reference that may be necessary CONTENTS 10 l AA aa 5 00 o EE 5 1 KMD 850MAH BIF CODIGG 5 2 KMD 850MWH water cooled eene 6 3 KMD 850MRH remote air coole 7 B COMO SR DPI EN 8 KURG Tv E 8 ll General Informati n EE 10 A CON SUNS ON E 10 1a Air Cooled Auxiliary Code C 0 and Earlter nne 10 1b Air Cooled Auxiliary Code C 1 and Later 11 2a Water Cooled Auxiliary Code C 0 and Earlter www 12 2b Water Cooled Auxiliary Code C 1 and later 13 Remote Air Cooled Auxiliary Code C 0 and 14 3b Remote Air Cooled Auxiliary Code C 1 and Later ll eLl 15 B Sequence of Operation EE 16 1 One Minute Fill Cycle stent cato entm trn p omms baa En cxtucmexsnsnscehatesntnctontmaxteeavideatncee 16 2 Initial Harvest Cycle qM 16 3 Freeze Cycle eeben eier 16 4 Pump Out Cycle Eege n 16 5 Normal Harvest Cycle EE 17 m Ch m b 19 1 Control Board Layout oases atte b ab aa ad aylar na 20 IF THE Mer 21 a Maximum Water Supply Period 6 minutes 21 b Harve
16. level in the storage bin No adjustment is required 1 Explanation of Operation The bin control is connected to the red K4 connector on the control board When the bin control is calling for ice proximity switch closed green BC CLOSED LED on the control board continues icemaking operations When the bin control is activated in the bin full position proximity switch open yellow BC OPEN LED on the control board shuts down the unit However to prevent incomplete batches of ice from forming on the evaporator the control board will only shut down the machine within the first 5 minutes of the freeze cycle If ice pushes the lever in after the first 5 minutes of the freeze cycle the control board will allow the machine to complete the freeze cycle and the following harvest cycle before shutting down the machine 2 Bin Control Check Procedure 1 Clear any ice away from the bin control 2 Move the control switch to the ICE position 3 Check that the green BC CLOSED LED on the control board is on 4 Activate the bin control actuator press the actuator in Check that the yellow BC OPEN LED on the control board is on 5 Disconnect the red K4 bin control connector from the control board 6 Check for continuity across the bin control leads When calling for ice the bin control proximity switch should be closed If open replace the bin control Activate the bin control actuator press the actuator in check for continuity ac
17. to failure due to static discharge It is especially important to touch the metal part of the unit before handling or replacing the board 3 Do not touch the electronic devices on the board or the back of the board to prevent damage to the board 4 Do not change wiring and connections Do not misconnect K3 K4 and K5 because the same connector is used for the thermistor mechanical bin control and float switch 5 Always replace the whole board assembly if it goes bad 6 Do not short out power supply to test for voltage 1 Control Board Layout G Control Board Bin Control Switch 1 LED Closed LED green ALARM RESET Button pi Dip Switch OUTPUT TEST Button used to test relays on control board eoovaLo9 Bin Control Switch Open LED yellow N a K3 white Connector Thermistor harvest control and high temperature safety SR K4 red Connector Ch oon Mechanical Bin Control Alarm Buzzer Xl goo S5 Dip Switch 6 poo 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 UN RED N WHITE KS Label control board revision level indicated on label es Ww K D2 P N 2A3792 01 o o Div s E99 509 Ya and which K1 ji connector pins are SES energized o o o 1 Connector LED 2 X2 Relay zx u P
18. 00 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 em G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg em G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 11 200 BTU h AT 90 F 32 C WT 70 F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 1 800 BTU h AT 90 F 32 C WT 70 F 21 C CONDENSER VOLUME 121 CU IN URC 9F Note 1 Pressure data is recorded at 5 minutes into freezing cycle The data not in bold should be used for reference only 2 We reserve the right to make changes in specifications and design without prior notice 38 IV Service Diagnosis A 10 Minute Diagnostic Procedure The 10 minute check out procedure is basically a sequence check which can be used at unit start up or for system diagnosis Using this check out procedure will allow you to diagnose electrical system and component failures in approximately 10 minutes under normal operating conditions of 70 F 21 C or warmer air and 50 F 10 C or warmer water temperatures Before conducting a 10 minute checkout check for correct installation proper voltage per unit nameplate and adequate water supply Check the S4 dip switch settings to assure that 3 4 7 8 9 amp 10 are in the factory default position Switches 1 2 5 amp 6 are cleaning adjustments a
19. 1 Vil Preparing the Icemaker for Long Storage CAUTION 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 dispenser unit The bin dispenser should be cleaned and dried Drain the icemaker to prevent damage to the water supply line at sub freezing temperatures using air or carbon dioxide Shut off the icemaker until the proper ambient temperature is resumed When the icemaker is not used for two or three days it is sufficient to only move the control switch to the OFF position unless the icemaker will be at sub freezing temperatures 1 On water cooled model only first remove the water from the water cooled condenser 1 Turn off the power supply and remove the front panel and right side panel 2 Close the condenser water supply line shut off valve and open the condenser water supply line drain valve 3 Attach a compressed air or carbon dioxide supply to the condenser water supply line drain valve 4 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 5 Close the condenser water supply line drain valve and replace the right side panel in its correct position 2 Remove the water from the icemaker water supply line 1 If you have not already done so t
20. 10 cycles S4 dip switch 5 amp 6 The compressor remains energized the hot gas valve energizes the fan motor de energizes self contained air cooled unit only the pump motor stops for 2 seconds The service relay energizes opening the drain valve and water valve and restarting the pump motor Water is taken from the sump and pumped through the drain valve and down the drain for 10 seconds This removes contaminants from the water reservoir Diagnosis If the pump motor does not run check the circuit service relay and capacitor Check for proper voltage If water does not pump out make sure S4 dip switch 3 amp 4 are in the factory default positions check and clean the tubing at the drain valve then check and clean the valve assembly 7 Normal Harvest Cycle same as the initial harvest cycle Return to step 4 Note Unit continues to cycle until bin control is satisfied or power is switched off The unit always restarts at the 1 minute fill cycle 40 B Diagnostic Charts 1 No Ice Production 1 The icemaker will not a Power Supply 1 Off blown fuse or 1 Turn on replace or reset tripped breaker 3 Bad contacts 3 Check for continuity and replace 4 Not within 4 Refer to nameplate and specifications correct b Main Transformer 1 Coil winding open or 1 Replace KMD 850MAH and shorted KMDMRH auxiliary Code C 1 and later KMD 850MWH auxiliary code C 2 and later c Water Supply 1 Water sup
21. 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 When brazing protect the drier by using a wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 F 121 C 2 Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG Do not use R 404A as a mixture with pressurized air for leak testing 3 Evacuation and Recharge R 404A 1 Attach a vacuum pump to the system Be sure to connect 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 Open the service manifold valv
22. 60 x 938 mm 115 V Galvanized Steel Net 81 Ibs 37 kg Shipping 92 Ibs 42 kg Permanent Connection Discharge Line 1 1 16 12 UNF Fitting 10 AEROQUIP Liquid Line 5 8 18 UNF Fitting 6 AEROQUIP Air cooled Fin and tube type Thermal Protection Condensing Pressure Regulator R 404A 3 65 14 8 oz 1780g High 467 PSIG VOLTAGE RANGE 104 127 V AMBIENT TEMP 20 122 F Leg 2 pcs Hex Head Bolt w Washer 8 x 16 8 pcs Hex Nut 8 8 pcs Note VVe reserve the right to make changes in specifications and design vvithout prior notice II General Information A Construction 1a Air Cooled Auxiliary Code C 0 and Earlier Spray Tubes Inlet Water Valve Water Supply Inlet Hot Gas Valve Junction Box Control Box Condenser Fan Motor Control Switch Float Switch Sg Drain Valve Thermostatic Water Pump Compressor Expansion Valves Cleaning Valve Bin Control 1b Air Cooled Auxiliary Code C 1 and Later Spray Tubes Inlet Water Valve Water Supply Inlet Hot Gas Valve Junction Box __ Condenser Thermostatic 12 21 Expansion Control Box Valves Condenser Fan Motor Float Swit
23. Auxiliary Code C 0 and Earlier 33 KMD 850MWH Auxiliary Code C 1 and 33 1b KMD 850MRH Auxiliary Code C 0 and 2 34 2 KMD 850MAH and KMD 850MRH Auxiliary Code C 1 and Later 35 KMD 850MWH Auxiliary Code C 2 and Later enn 35 C Performance Daldus AAA 36 1 KMD 850MAH EE 36 2 KMD 850MWH E E n 37 3 KMD 850MRH remote air cooled 38 ee ue DRE 39 A 10 Minute Diagnostic reen TEE 39 B Diagnostie CAINS ebe geed 41 At ING ICS PUA 41 2 Evaporator is Frozen UD E 44 e Low lce PROOUCOHOD E 45 let 46 E TE 46 V Refrigeration Circuit and Component Service Information 47 A Refrigeration Circuit 47 1 Refrigerant RECOVETY EE 47 x Brazing E 48 3 Evacuation and BHecharge FisdOdA viciiscessnsccmserwsmsvaravasensencusseeabadeeseemeanermpravaenewens 48 B Component le ege EEN 50 C Adjustment of Water Regulating Valve Water Cooled Model Only 50 LIB EI MUS FAN er 51 VII Preparing the Icemaker for Long Giorage un 52 ATTEN 54 I Specifications A Icemaker 1 KMD 850MAH air cooled AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day Reference without mar
24. Control Board Check Procedure Water Regulating Valve 1 Leaking by in harvest 1 Check and replace water cooled model 3 Other a Spray Tubes 1 Clogged 2 Out of position 2 Place in position b Water System 2 Water supply line too 2 Increase water line size small requires 3 8 OD line dedicated per machine 3 Water filter flow rate 13 Replace with filter that has too small larger flow rate c Refrigerant 1 Low charge 1 Check for leaks and recharge d Thermostatic 1 Bulb out of position or 1 Place in position Expansion Valve loose attachment 2 Defective 2 Replace e Hot Gas Valve 1 Coil winding opened 1 Replace 2 Plunger does not 2 Replace move 3 Wiring to hot gas 3 Check for loose valve connection or open and replace f Ice Cube Guide 1 Out of position and ice 1 Place in position trapped 3 Low Ice Production Possible Cause 1 Freeze cycle time is a See chart 2 1 and check float switch inlet water valve control board water long pump spray tubes evaporator and thermostatic expansion valve b See chart 1 1 and check dirty air filter or condenser ambient or water temperature refrigerant charge water pressure and condenser water regulating valve water cooled model c Check pump hot gas valve headmaster C P R remote air cooled model only thermostatic expansion valve refrigeration check valve and compressor 2 Harvest cycle ti
25. Gas Valve 1 Continues to open 1 Check for hot gas valve in freeze cycle and stuck open and replace freeze timer safety operates 3 beep alarm m Inlet Water Valve 1 Mesh filter or orifice 11 Clean gets clogged and water supply cycle does not finish 2 Coil winding opened 2 Replace 3 Wiring to water valve 3 Check for loose connection or open and replace n Control Board 1 Defective or in alarm 1 See II C 4 Control Board Check Procedure 2 Water continues to a Float Switch 1 Connector 1 Reconnect be supplied and the disconnected icemaker will not 2 Defective switch 2 Check and replace Start 3 Float does not move 3 Clean or replace freely b Control Board 1 Defective 1 See II C 4 Control Board Check Procedure 3 Compressor will a Magnetic Contactor 1 Bad contacts 1 Check for continuity and not start or stops replace operating 2 Coil winding opened 2 Replace b Start Capacitor or Run 1 Defective 1 Replace Capacitor c Internal Overload 1 Loose terminal 1 Tighten or replace Protector Open check 1 through 3 to the right 2 Voltage 2 Check and correct and d through f below 3 Dirty condenser d Starter 1 Check and replace 2 Coil winding opened 2 Replace 42 3 Compressor will not start or stops operating continued 1 Power supply not within specifications e Compressor 2 Wiring to compressor 3 Defective 4 Protecto
26. Hoshizaki America Inc Modular Crescent Cuber Models KMD 850MAH KMD 850MWH KMD 850MRH SERVICE MANUAL A Superior Degree of Reliability www hoshizaki com Number 73163 Issued 9 3 2008 Revised 9 2014 IMPORTANT Only qualified service technicians should attempt to install service or maintain this icemaker No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual Failure to service and maintain the equipment in accordance with this manual may adversely affect safety performance and warranty coverage Hoshizaki provides this manual primarily to assist qualified service technicians in the service and maintenance of the icemaker Should the reader have any questions or concerns which have not been satisfactorily addressed please call write or send an e mail message to the Hoshizaki Technical Support Department for assistance HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Attn Hoshizaki Technical Support Department Phone 1 800 233 1940 Technical Service 770 487 2331 Fax 1 800 843 1056 770 487 3360 E mail techsupport 9 hoshizaki com Web Site www hoshizaki com NOTE To expedite assistance all correspondence communication MUST include the following information Model Number e Serial Number Complete and detailed explanation of the problem IMPORTANT This manual should be read carefully before the
27. ING WATER CONTROL Timer Controlled Overflow Pipe COOLING WATER CONTROL Pressure Regulator BIN CONTROL SYSTEM Mechanical Lever Switch and Timer COMPRESSOR Hermetic Model CS08KQE PFV 255 CONDENSER Water cooled Tube in tube type EVAPORATOR Vertical type Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A 1 Ib 12 6 oz 810g DESIGN PRESSURE High 427PSIG Low 230PSIG P C BOARD CIRCUIT PROTECTION High Voltage Cut out Internal COMPRESSOR PROTECTION Auto reset Overload Protector Internal REFRIGERANT CIRCUIT PROTECTION Auto reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES SUPPLIED N A REQUIRED Ice Dispenser or Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE 187 253 V AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 F WATER SUPPLY PRESSURE 10 113 PSIG Note We reserve the right to make changes in specifications and design without prior notice 3 KMD 850MRH remote air cooled 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 KVVH 100 lbs WATER gal 24HR gal 100 Ibs CEC CEE TIER LEVEL ENERGY STAR EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY
28. ater has been converted into ice before switching out of the freeze cycle No adjustment is required 1 Float Switch Check Procedure To check the float switch follow the steps below 1 Turn off the power supply 2 Remove the front panel and move the control switch to the OFF position 3 Remove the insulation panel Remove cube guide B then remove cube guide A Remove the overflow cap overflow pipe and water shield See Fig 1 4 Remove the drain plug and drain the water tank Replace the drain plug in its correct position Be careful not to cross thread it 5 Replace the water shield overflow pipe overflow cap cube guide A and cube guide B in their correct positions Be careful not to cross thread the overflow pipe 26 6 Remove the control box cover 7 Disconnect the black float switch connector from the K5 connector on the control board 8 Check for continuity across the float switch leads With the water tank empty the float switch should be open If open continue to step 9 If closed follow the steps in ILE 2 Float Switch Cleaning After cleaning the float switch check it again Replace if necessary 9 Reconnect the black float switch connector then replace the control box cover 10 Move the control switch to the ICE position Replace the insulation panel and front panel in their correct positions then turn the power supply on After 1 minute the 1 minute fill cycle should end and the initial harvest
29. ch Main Transformer Drain Valve i Drier Cleaning Valve Bin Control 11 2a Water Cooled Auxiliary Code C 1 and Earlier Hot Gas Valve Junction Box Condenser Control Box Regulator Control Switch Drier Water Supply Inlet Compressor Inlet Water Valve wa z EN 5 ofl ex N o dr M EX RIT S m 7 m E SE Eds 8 Ope 7 l c 4 m i Cleaning Valve Water Pump Drain Valve Spray Tubes Float Switch 2b Water Cooled Auxiliary Code C 2 and Later Spray Tubes Thermostatic 3 Expansion ES Valves Float Switch Drain Valve Water Pump Cleaning Valve Control Switch Inlet Water Valve Drier Compressor Water Supply Inlet Hot Gas Valve z Junction Box water Regulator Control Box Main Transformer 3a Remote Air Cooled Auxiliary Code C 0 and Earlier Inlet Water Valve Water Supply Inlet Hot Gas Valve Spray Tubes Junction Boxes Control Box
30. cordance with applicable national state and local codes and regulations Refrigerant must be recovered by properly certified service personnel 54
31. cycle should begin If the initial harvest cycle begins the float switch is good and the check is complete If the initial harvest cycle does not begin continue to step 11 11 12 13 14 15 16 Turn off the power supply Remove the front panel Move the control svvitch to the OFF position Remove the control box cover Disconnect the black float svvitch connector from the K5 connector on the control board Check for continuity across the float svvitch leads VVith the vvater tank full the float switch should be closed If the float switch is closed and the icemaker will not switch from the 1 minute fill cycle to the initial harvest cycle replace the control board If open confirm that the water tank is full If the tank is not full check the water supply water filters and inlet water valve If the tank is full follow the steps in II E 2 Float Switch Cleaning After cleaning the float switch check it again Replace if necessary Overflow Cap Fig 1 Overflow Pipe Water Shield Drain Plug ube Guide B O 2 Float Switch Cleaning Depending on local water conditions scale may build up on the float switch Scale on the switch can cause the float to stick In this case the float switch should be cleaned 1 Turn off the power supply 2 Remove the front panel and move the control switch to the OFF
32. d for reference only 2 We reserve the right to make changes in specifications and design without prior notice 36 2 KMD 850MWH water cooled APPROXIMATE ICE AMBIENT TEMP Get CFPC 70 21 80 27 90 32 bs day _kg day 100 38 APPROXIMATE ELECTRIC 70 21 CONSUMPTION 80 27 90 32 watts 100 38 APPROXIMATE WATER 70 21 CONSUMPTION PER 24 HR 80 27 90 32 gal day m day 100 38 FREEZING CYCLE TIME 70 21 80 27 90 32 min 100 38 HARVEST CYCLE TIME 70 21 80 27 90 32 min 100 38 HEAD PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 10 400 BTU h AT 90 F 32 C WT 70 F 21 C TOTAL HEAT OF REJECTION FROM COMPRESSOR 1 600 BTU h AT 90 F 329C WT 70 F 21 C WATER FLOW FOR CONDENSER 98 gal h AT 100 F 38 C WT 90 F 329C PRESSURE DROP OF COOLING WATER LINE less than 10 PSIG Note 1 Pressure data is recorded at 5 minutes into freezing cycle The data not in bold should be used for reference only 2 We reserve the right to make changes in specifications and design without prior notice 37 3 KMD 850MRH remote air cooled APPROXIMATE ICE AMBIENT TEMP WATER TEMP F C PRODUCTION PER 24 HR F C 50 10 709 90 32 833 738 70 21 793 60 70 21 378 80 27 803 364 741 686 90 32 793 698 641 Ibs day kg day 100 38 782 355 685 589 APPROXIMATE ELECTRIC 70 21 CONSUMPTION 80 27 90 32 watts 1
33. e x Access Compressor Access Valve 31 3 Remote Air Cooled Model Condensing Pressure Regulator Condenser Unit Condenser Receiver Tank Spray Tube Access Valve Fusible Plug Strainer 4 Evaporator Hot Gas Valve Water Valve Water ER E mm Cleaning EE Valve Insulation Tube Check Valve t Suction Line Liguid Line Valve j H KN Water th Tank amp P Drain Valve sa Drain Pump Motor Float Switch Pressure NC Switch High Discharge Line Compressor Access Valve J Expansion Valve E Refrigerant Circuit m Water Circuit B Wiring Diagrams 1a KMD 850MAH Auxiliary Code C 0 and Earlier KMD 850MWH Auxiliary Code C 1 and Earlier AGLL 12 AS OL jndino jeuuoJsueJ Co 0154 lZ v8c 0154 ELZFLZE uno DIS 2286 DOVN pejoo2 iejeM 9194 2221 9po N YMS eJnssaJgd 14004 031002 diy A TINO e YAWuOSS l 20 Lo Lo Ou 3AWA SV510H Co ya to 4 U 1 L 9 74 97 4002 40103 F9 JAWA AWA t d K Nivad M31YM X Aey To
34. emote condenser unit and the hot gas valve energizes The inlet water valve is open during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds whichever is shorter The pump motor energizes and runs for the last 50 seconds of harvest The evaporator warms and the thermistor senses 48 F 9 C The control board then receives the thermistor s 3 9 kO signal and turns operation of harvest over to the harvest timer The timer has settings of 60 90 120 and 180 seconds S4 dip switch 1 amp 2 The last 50 seconds of the harvest timer countdown the inlet water valve de energizes and the water pump energizes LED 4 goes off and LED 3 comes on When the harvest timer countdown is complete the freeze cycle starts Diagnosis Check if compressor is running hot gas valve is open inlet water valve still open Average harvest cycle at factory setting is 2 to 3 minutes How long does initial harvest last 1 5 minutes after initial harvest begins touch the compressor discharge line Is it hot If not check refrigerant pressures and compressor operation If it is hot touch the inlet line to the evaporator Is it hot If it is hot and the freeze cycle is not starting check the harvest timer adjustment the thermistor for open circuit the discharge line temperature compressor efficiency and if the hot gas valve is fully open 39 5 Freeze Cycle LED 1 is on Compressor and fan motor on a remote air cooled unit remains energ
35. ernal Auto reset High Pressure Control Switch Float Switch N A Ice Dispenser or Ice Storage Bin Remote Condenser Unit VOLTAGE RANGE 187 253 V AMBIENT TEMP 45 100 F WATER SUPPLY TEMP 45 90 F WATER SUPPLY PRESSURE 10 113 PSIG Note We reserve the right to make changes in specifications and design without prior notice B Condenser Uni 1 URC 9F 11 SI 097 LET E13 GeV 115 v1 01 846 33 31 161 29 61 s voull ww lun 811 34 29 811 7 oe 491 10 Specifications MODEL URC 9F AC SUPPLY VOLTAGE FAN MOTOR EXTERIOR DIMENSIONS WxDxH DIMENSIONS INCLUDING LEGS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC REFRIGERANT CONDENSER FAN MOTOR PROTECTION REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE OPERATING CONDITIONS ACCESSORIES SUPPLIED 115 60 1 Connection to Icemaker Total 1 3FLA 65W 32 3 16 x 15 11 16 x 21 15 16 817 x 398 x 558 mm 34 5 16 x 18 1 8 x 36 15 16 871 x 4
36. es 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 service manifold 48 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 For air cooled and water cooled models see the nameplate for the required refrigerant charge For remote air cooled models see the rating label inside the icemaker Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No 700 88 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 access valves
37. ins 1 through 10 LED 2 on 1 9 Magnetic Contactor or K1 Connector Pin 2 Dr Compressor Relay LED 2 off 2 Hot Gas Valve K1 Connector Pin 3 O lo 3 Fan Motor oo R o O o o LED 3 X3 Relay T a Liquid Line Valve LED 3 on Se Ae 4 Pump Motor icemaking K1 Connector Pin 5 SC o S O OIM 5 Pump Motor LED 3 off Oi harvest pump timer and K1 Connector Pin 4 o oo pump out energized in freeze yx 6 Inlet Water Valve oO 7 10 Component Power LED 4 X4 Relay K2 o o Supply K1 Connector Pin 6 e 6 6 Q 8 Open LED 1 X1 Relay K1 Connector Pin 1 9 K2 Connector Control Transformer 10 5VAC G Control Board Part Number 2A3792 01 20 2 Features a Maximum Water Supply Period 6 minutes The inlet water valve will be open during harvest for 6 minutes or the length of harvest minus 50 seconds whichever is shorter b Harvest Backup Timer and Freeze Timer The harvest backup timer shuts down the icemaker if for two cycles in a row the harvest cycle takes more than 20 minutes to complete The control board will signal this problem using 2 beeps every 3 seconds The freeze timer shuts down the icemaker if for two cycles in a row the freeze cycle takes longer than the time specified to complete The control board will signal this problem using 3 beeps every 3 seconds The time is factory set using S4 dip switch 9 amp 10 The ALARM RESET button on the control
38. ized pump motor liquid line valve if applicable and fan motor self contained air cooled unit energize The inlet water valve and hot gas valve de energize The unit is held in freeze by a 5 minute short cycle protection timer After the 5 minute short cycle protection timer terminates the freeze cycle operation is transferred to the float switch for freeze termination During the first 5 minutes of freeze confirm that the evaporator temperature drops After 5 minutes in freeze remove the black float switch lead from the K5 connector The unit should switch out of the freeze cycle Diagnosis If the evaporator is not cold check to see if the hot gas valve is still open or if the thermostatic expansion valve is not opening properly if the water valve is continuing to fill the reservoir if there are improper unit pressures an inoperative compressor or an inoperative headmaster C P R remote condenser unit only If the unit remains in freeze with the float switch removed replace the board Note Normal freeze cycle will last 20 to 40 minutes depending on model and conditions Cycle times and pressures should follow performance data provided in this manual 6 Pump Out Cycle 10 second pump out LEDs 1 4 3 2 are on With S4 dip switch 5 and 6 in the factory default position the 1st pump out occurs after the 11th freeze cycle and every 10th cycle thereafter The pump out cycle can be adjusted to occur every cycle or every 2 5 or
39. ks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC amp WATER CONSUMPTION ELECTRIC W KVVH 100 lbs WATER gal 24HR gal 100 Ibs CEC CEE TIER LEVEL ENERGY STAR 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 netrual for 115V 9 8A 5 Min Freeze AT 104 F WT 80 F 90 Crescent Cube 11 8 Ibs 5 4 kg 624pcs N A 90 70 F 70 50 F 1570 5 9 1510 4 6 125 19 5 291 37 0 1 NO 30 x 24 5 8 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 Outlet 3 4 FPT 5 8 OD Tube Float Switch Hot Gas and Water Thermistor and Timer Timer Controlled Overflow Pipe N A Mechanical Lever Switch and Timer Hermetic Model CSO8KQE PFV 255 Air Cooled Fin and tube type Vertical type Stainless Steel and Copper Thermostatic Expansion Valve R404A 2 Ib 8 2 oz 1140g High 467PSIG Low 230PSIG High Voltage Cut out Internal
40. mE VEM 4044 1 3100 310439 11004 CMO 3 0 HOT Hye qoss idulo OL iddns 120g 17 x 1300W 03100 310 3 yn Dame Tas 1 ASLI ye SEI Turuz 1 am AAT 1 i 1 AS 0L indino EE sila m i ieuuojsuejj m OR onal 217 l ua 3401 c IT KA behi Ni 3I 3H EN mn m T Si Sle l rel illi i le E NI r SUREN j d 27 mi DONNA isi fik T A FRE o JM seres 0 0000000000 7 si du vu A80 E DE 2 1 b H DI III DI 2 r e ce iS A8 n i HH L 1 1 1 lE IUE 1 1 1 ubi QNO ha Bu Lal i H ik l 104 1 C Performance Data 1 KMD 850MAH air cooled APPROXIMATE ICE AMBIENT TEMP PRODUCTION PER 24 HR CFPC 70 21 786 357 743 685 80 27 753 342 686 629 90 32 743 337 639 580 Ibs day kg day 100 38 732 332 625 526 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 em G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg em G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 13 200 BTU h AT 90 F 32 C WT 70 F 21 C Note 1 Pressure data is recorded at 5 minutes into freezing cycle The data not in bold should be use
41. me is a See chart 2 2 and check evaporator water supply line inlet water valve ambient and or water temperature liquid line valve if applicable thermistor control board and hot gas valve 4 Abnormal Ice Possible Cause 1 Small cubes a Ice Cube Guide 1 Out of position 1 Place in position Circulated water falls into bin b See chart 1 5 and check water supply line inlet water valve water system pump motor and control board 2 Cloudy or irregular a See chart 2 1 and 2 3 and check float switch inlet water valve control board cubes spray tubes water system refrigerant charge and thermostatic expansion valve b Spray Guids c Water Quality 1 High hardness or 1 Install a water softener or contains impurities filter 5 Other Possible Cause 1 icemaker will not stop a Bin Control 1 Defective 1 See II F 2 Bin Control when bin is filled with Check Procedure ice 2 Abnormal noise a Pump Motor 1 Bearings worn out 1 Replace b Fan Motor except 1 Bearings worn out 1 Replace water cooled model 5 Fan blade deformed 2 Replace 3 Fan blade does not 3 Replace move 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 1 Reposition lines or surfaces 3 Ice in storage bin a Drain Line s 1 Plugged often melts b Icemaker and Bin
42. nd the settings are flexible Check the S5 dip switch settings to assure that they are in the factory default positions For factory defaults see II C 3 a Default Dip Switch Settings As you go through the procedure check to assure the components energize and de energize correctly If not those components and controls are suspect Check for voltage at the 10 pin connector 1 Turn power off and access the control box 2 Turn power on and place the control switch in the ICE position A 5 second delay occurs The red POWER OK LED and the green BC CLOSED LED on the control board come on 3 One Minute Fill Cycle LED 4 is on The inlet water valve is energized After 1 minute the control board checks the float switch If the float switch is closed the unit cycles to harvest If closed continue to step 4 If the float switch is open the unit repeats the 1 minute fill cycle until water enters and the float switch closes low water safety protection during initial start up and at the end of each harvest Diagnosis If the inlet water valve does not open check for no supply voltage at water valve terminals bad coil or plugged screen or external filter no water flow If unit fails to start harvest check for open float switch or bad 1 minute timer in control board 4 Initial Harvest Cycle LEDs 1 4 and 2 are on The inlet water valve remains energized the contactor coil energizes to start the compressor and fan motor on a r
43. on Comp FMR and HGV remain energized and WV opens PM stops As the evaporator warms the thermistor reaches 48 F 9 C The control board then receives the thermistor s 3 9 kO signal and starts the harvest timer When the harvest timer completes its countdown the harvest cycle is complete The minimum total time allowed by the board for a complete harvest cycle is 2 minutes WV is energized during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds whichever is shorter LED 4 goes off when WV closes PM energizes and runs for the last 50 seconds of harvest LED 3 comes on when PM energizes At the end of harvest the control board checks the position of F S and proceeds to the freeze cycle if it is closed or calls for a 1 minute fill if it is open The unit continues to cycle through freeze and harvest cycles until the bin control activates opens and shuts the unit down Note To prevent incomplete batches of ice from forming on the evaporator the control board will only shut down the machine within the first 5 minutes of the freeze cycle If ice pushes the bin control actuator in open after the first five minutes of the freeze cycle the control board will allow the machine to complete the freeze cycle and the following harvest cycle before shutting down the machine Legend Comp compressor DV Drain Valve FMR remote fan motor FMS self contained fan motor F S float switch HGV hot gas valve LLV liquid line val
44. ply off or 1 Check and get pressure too low recommended pressure d Fuse Control Box 1 Blown 1 Check for short circuit and replace e Control Switch 1 OFF or WASH 1 Move to ICE position position 2 Bad contacts 2 Check for continuity and replace f Bin Control 1 Tripped with bin filled 1 Remove ice with ice 2 Defective 2 See II F 2 Bin Control Check Procedure 9 High Pressure Control 11 Bad contacts 1 Check for continuity and replace 2 Dirty air filter or 2 Clean condenser 3 Ambient or condenser 3 Reduce temperature water temperature too warm 4 Refrigerant 4 Recharge overcharged 5 Fan not operating 5 See chart 1 7 except water cooled model 6 Refrigerant line or 6 Clean and replace drier components plugged 7 Condenser water 7 Check and get pressure too low or recommended pressure off water cooled model only 41 1 The icemaker will not h Control Transformer 1 Coil winding opened 11 Replace start continued or shorted i Wiring to Control Board 1 Loose connections or 1 Check for continuity and open replace j Interlock Switch 1 Open position 1 Move to closed position Cleaning Valve 2 Bad contacts 2 Check for continuity and replace k Thermistor 1 Leads shorted or 1 See D Harvest Control opened and high Thermistor temperature or harvest backup timer safety operates 1 beep or 2 beep alarm Hot
45. position 3 Remove the insulation panel Remove cube guide B then remove cube guide A Remove the overflow cap overflow pipe and water shield See Fig 1 4 Remove the drain plug and drain the water tank Replace the drain plug in its correct position Be careful not to cross thread it 5 Replace the water shield overflow pipe overflow cap cube guide A and cube guide B in their correct positions Be careful not to cross thread the overflow pipe 6 Disconnect the vent tube and flush tube from the top of the float switch then remove the float switch and rubber boot 7 Remove the retainer rod from the bottom of the float switch assembly then remove the float Be careful not to bend the retainer rod excessively when removing it 8 Wipe down the float switch assembly s housing shaft float and retainer rod and clean the inside of the rubber boot and hose with a mixture of 1 part of Hoshizaki Scale Away 25 parts of warm water Rinse the parts thoroughly with clean water 9 Reassemble the float switch assembly and replace it and the rubber boot in their correct positions Reconnect the vent tube and the flush tube 10 Move the control switch to the ICE position 11 Replace the insulation panel and front panel in their correct positions 12 Turn on the power supply to start the automatic icemaking process 28 F Bin Control This machine uses a lever actuated proximity switch mechanical bin control to control the ice
46. r tripped f Control Board 1 No power to contactor a Water Pressure 1 Too high b Inlet Water Valve 1 Diaphragm does not close 4 Water continues to be supplied in freeze cycle c Control Board 1 Defective a Pump Motor 1 Motor winding opened 2 Bearing worn out 3 Wiring to pump motor 4 Defective capacitor 5 Defective or bound impeller a Pump Motor 6 Mechanical seal worn continued out b Control Board 1 Defective 5 Water pump will not start 6 Freeze cycle time is too short c Control Switch a Drain Valve 1 Leaking by c Control Board 1 Defective 1 Motor winding opened 2 Bearing worn out 3 Wiring to fan motor 7 Fan motor will not start or is not operating except water cooled model a Fan Motor b Float Switch 1 Dirty or erratic operation 4 Defective capacitor 5 Fan blade bound 8 All components run but no ice is produced a Refrigerant 1 Low charge 2 Air or moisture trapped 43 1 Refer to nameplate and correct 2 Check for loose connection or open and replace 3 Replace 4 Reduce temperature 1 See Il C 4 Control Board Check Procedure 1 Reduce 1 Check for water leaks with icemaker off 1 See II C 4 Control Board Check Procedure 1 Replace 2 Replace 3 Check for loose connection or open and replace 4 Replace 5 Replace and clean 6 Check and replace 1 See II C 4
47. ross the bin control leads The bin control proximity switch should be open If closed replace the bin control 7 Reconnect the red K4 connector Allow the machine to cycle into the freeze cycle In the first 5 minutes of the freeze cycle activate the bin control actuator press the actuator in The yellow BC OPEN LED should come on and the machine should turn off If not replace the control board Fig 2 Bin Control Switch Open bin full Bin Control Switch Closed calling for ice 29 Ill Technical Information A Water Circuit and Refrigeration Circuit 1 Air Cooled Model Condenser 2 Fan Spray Tube Drier Evaporator E Water Valve Water L Cars Supply d Strainer Hot Gas Valve Cleaning Valve Insulation Tube Valve gt Pressure Switch High Float Switch 11 Access Discharge Line Valve Compressor Access Vaive Refrigerant Circuit yanm Water Circuit Expansion Valve 30 2 Water Cooled Model Water Regulating Valve Condenser Drain Water Supply Spray Tube Water Valve Evaporator Strainer Water us ue 1 Hot Gas Valve amp Cleaning Valve Fioat Switch Refrigerant Circuit Ke mmmm Water Circuit Expansion Valve Pressure Switch High Suction Del Discharge Lin
48. s light in a different sequence the control board is bad and should be replaced 5 Control Board Replacement Adjust the dip switches to the factory default settings See II C 3 a Default Dip Switch Settings S4 dip switch 8 must remain off If there is a switch present between relay X3 amp X4 move it to the ALP position D Harvest Control Thermistor A thermistor is used as a harvest control sensor The therminstor s resistance varies depending on the suction line temperatures The control board monitors the resistance to start the harvest timer No adjustment is required 1 Thermistor Check Procedure If necessary check the resistance between thermistor leads and visually check the thermistor mounting located on the suction line next to the evaporator outlet To check the resistance between thermistor leads follow the steps below 1 Disconnect the connector K3 on the board 2 Remove the thermistor See V I Removal and Replacement of Thermistor 3 Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes 4 Check the resistance between thermistor leads Normal reading is within 4 7 to 6 2 kO Replace the thermistor if it is outside the normal reading E Float Switch The float switch is used to determine that there is sufficient water in the tank after the 1 minute fill cycle and after each harvest cycle The float switch is also used to determine that the appropriate volume of w
49. see II C 3 a Default Dip Switch Settings 2 Move the control switch to the ICE position The red POWER OK LED should come on If the red LED is on the control voltage is good and you can proceed to step 3 If the red LED is off check the control transformer secondary circuit The transformer secondary circuit includes the cleaning valve interlock switch Make sure the interlock switch is closed otherwise no control voltage is supplied to the K2 connector Transformer output is 10 5V at 115V primary input If the secondary circuit has proper voltage and the red LED is off the control board is bad and should be replaced If the secondary circuit does not have proper voltage check the control transformer primary circuit Check for 115V at the 10 pin connector Check the brown wire at pin 10 to a white neutral wire for 115V Always choose a white neutral wire to establish a good neutral connection when checking voltages For additional checks see IV B 1 1 The icemaker will not start 25 3 The OUTPUT TEST button provides a relay sequence test Make sure the control switch is in the ICE position then press the OUTPUT TEST button The correct lighting sequence should be 1 4 3 2 Some components e g the compressor will cycle during the test Note that the order of the relays from the outer edge of the board is 1 4 3 2 After checking the sequence the unit automatically starts at the 1 minute fill cycle If the LED
50. shown in the table below Dip Switch Setting Frequency every 5 cycles every 10 cycles ON 24 el S4 Dip Switch 7 amp 8 Factory set for optimum performance Do not adjust f Freeze Timer S4 dip switch 9 amp 10 CAUTION Adjust to proper specification or the unit may not operate correctly The freeze timer setting determines the maximum allowed freeze time to prevent possible freeze up issues Upon termination of freeze timer the control board initiates the harvest cycle After 2 consecutive timer terminations the control board shuts the machine down In this case see IV B 3 Low Ice Production for possible solutions The freeze timer is factory adjusted and no adjustment is required Time OFF oF 60 ON ON 60 g Float Switch Control S5 dip switch 1 through 5 Do not adjust These must be left in the factory default position or the unit will not operate properly 4 Control Board Check Procedure Before replacing a control board 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 1 Check the S4 dip switch settings to assure that 3 4 7 8 9 amp 10 are in the factory default position Switches 1 2 5 amp 6 are cleaning adjustments and the settings are flexible Check the S5 dip switch settings to assure that they are in the factory default positions For factory defaults
51. st Backup Timer and Freeze Tmer mim wwawa 21 c High Temperature Gatetv Auen 21 d Low YET S a dal t 21 e High Voltage and Low Voltage Cut Outs 21 f LED Lights and Audible Alarm Safeti S W 22 3 Controls and Ee E 23 a Default Dip Switch SOWIMGS scisicscsesciccecnsnsncasdaissasasasagnonsnonandsedacedsacqusngesaacheecataxes 23 b Harvest Timer S4 dip switch A2 23 c Pump Out Timer S4 dip switch 3 amp A 24 d Pump Out Frequency Control S4 dip switch 5 amp 6 24 LANA Nauru ku Runs 25 f Freeze Timer S4 dip switch 9 amp 0 25 g Float Switch Control S5 dip switch 1 through 5 25 3 4 Control Board Check Procedure 8 88 88888888828833383383 83 3122 25 5 Control Board Replacement ii 26 D Harvest e EN TEE 26 1 Thermistor Check e F A a ayba dan aaa aka asa 26 E dole MEET 26 1 Float Switch Check Procedure E 26 2 Float Switeh Cleaning EE 28 E BiN COMTO E 29 1 EE eieiei e EE 29 2 Bin Control Check PrOCBEURO LLL n n y b y a aaa A BANANI MANE a a aaa aa asi 29 lll Technical IMOrmMmat E 30 A Water Circuit and Refrigeration Circuit usui notata torture bua pe purdadu bal kapakabax a 30 TAirCooled MAA T 30 2 Water Cooled e TE 31 3 Remote Air Cooled Ee EE 32 laien E 33 1a KMD 850MAH
52. switch 3 amp 4 CAUTION Do not adjust Leave in the factory default position otherwise the drain valve and water valve will not operate at pump out When a freeze cycle is completed and a pump out is called for the pump motor stops for 2 seconds The pump motor then restarts and the drain valve and water valve open Water is taken from the sump and pumped through the drain valve and down the drain for 10 seconds The pump out timer also acts in place of the harvest timer during cycles with a pump out The pump out timer is factory adjusted Leave in the factory default position otherwise the drain valve and inlet water valve will not operate at pump out F 120 open 0 i 1 T1 Time to drain the water tank T2 Harvest timer at pump out Depending on the pump out frequency control setting dip switch 5 amp 6 pump out occurs every cycle or every 2nd 5th or 10th cycle d Pump Out Frequency Control S4 dip switch 5 amp 6 The pump motor drains the water tank at the frequency set by the pump out frequency control The pump out frequency control is factory adjusted to drain the water tank every 10 cycles and no adjustment is generally required With dip switches 5 and 6 in the factory default position the 1st pump out occurs after the 11th freeze cycle and every 10th cycle thereafter However where water quality is bad and the icemaker needs a pump out more often the pump out frequency can be adjusted as
53. t 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 drier by using a wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 F 121 C 1 Refrigerant Recovery The 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 47 2 Brazing WARNING 1 R 4044 itself is not flammable at atmospheric pressure and temperatures to 176 F 80 C 2 R 4044 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 4 Do not use silver alloy or copper alloy containing arsenic 1 Braze all fittings while purging with nitrogen gas flowing at a pressure of
54. tment of Water Regulating Valve Water Cooled Model Only The water regulating valve also called water regulator is factory adjusted No adjustment is required under normal use Adjust the water regulator if necessary using the following procedures 1 Prepare a thermometer to check the condenser drain temperature Attach a pressure gauge to the high side line of the system ENEE 2 Five minutes after a freeze cycle starts confirm that the thermometer reads 104 F owe to 115 F 40 C to 46 C If it does not CW Higher rotate the adjustment screw by using a flat blade screvvdriver until the temperature is in the proper range See Fig 3 Next check that the reference pressure is in the range indicated in the Head Pressure table in the Performance Data section If it is not in the Top View Fig 5 Y proper range verify the refrigerant charge 3 Check that the condenser drain temperature is stable 50 VI 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 A 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
55. to prevent a possible leak 49 B Component Service Information NOTICE When replacing a component listed below see the notes to help ensure proper operation Component Notes O 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 l Replace the strainer if applicable 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 e 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 KM 650MWH M Tighten the water regulating valve flare nut to a torque of 39 8 ft Ib 53 9 N m Water Regulating Valve C Adjus
56. 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 Filters Icemaker Exterior Wipe down with a clean soft cloth Use a damp cloth containing a 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 Unit Ice in the instruction manual or maintenance label on the icemaker Storage Bin Liner system Clean the water supply inlet screen frequent cleaning may be required depending on location As Needed Marine Model If contaminated seawater enters the system flush with clean seawater or Condenser fresh water as soon as possible to minimize damage to the condenser 5
57. urn off the power supply and remove the front panel 2 Close the icemaker water supply line shut off valve and open the icemaker water supply line drain valve 3 Allow the line to drain by gravity 4 Attach a compressed air or carbon dioxide supply to the icemaker water supply line drain valve 5 Make sure at least 3 minutes have elapsed since you turned off the power supply Make sure the control switch is in the ICE position Replace the front panel in its correct position and turn on the power supply 6 Blow the icemaker water supply line out using the compressed air or carbon dioxide supply 7 Close the icemaker water supply line drain valve 52 3 Drain the water tank 1 Turn off the power supply 2 Move the control switch to the OFF position 3 Remove the insulation panel Remove cube guide B then remove cube guide A Remove the overflow cap overflow pipe and water shield See Fig 7 4 Remove the drain plug 5 Remove all ice from the storage bin dispenser unit Clean the storage bin dispenser unit using a neutral cleaner Rinse thoroughly after cleaning 6 Replace the drain plug water shield overflow pipe overflow cap cube guide A cube guide B and insulation panel in their correct positions Be careful not to cross thread the drain plug or overflow pipe 7 Replace the front panel in its correct position 53 VIII Disposal The appliance contains refrigerant and must be disposed of in ac
58. ve 22 3 Controls and Adjustments a Default Dip Switch Settings The dip switches are factory adjusted to the following positions S4 Dip Switch Dip Switch No Auxiliary Coe 1 2 3 8 6 7 8 9 10 F KMD 850MRH C 1 and Later OFF ON OFF ON ON ON ON oFF OFF OF KMD 850MWH C 1 and Farer OFF OFF OFF ON ON ON ON OFF OFF OFF 6 2 and Later OFF ON OFF ON ON ON ON OFF OFF oF S5 Dip Switch Do Not Adjust Dip Swen 2 3 KMD asoMAH OFF OFF OFF OF Freeze Timer 9 amp 10 S4 Dip Switch Normally off 8 Do not adjust 7 Pump Out Frequency Control 5 amp 6 Pump Out Timer Do not adjust 3 amp 4 Harvest Timer 1 amp 2 b Harvest Timer S4 dip switch 1 amp 2 The harvest timer starts counting when the thermistor reads 48 F 9 C at the evaporator outlet No adjustment is required under normal use as the harvest timer is adjusted to the suitable position However a setting longer than the factory setting may be advised in cases where the flush provided at harvest needs to be prolonged for extra cleaning Before changing this setting call the Hoshizaki Technical Support Department at 1 800 233 1940 for recommendations Keep in mind that setting the harvest timer to a longer setting will decrease 24 hour production Dip Switch Setting Time seconds or e or 23 c Pump Out Timer S4 dip
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