Hoshizaki KMD-210AB-HC Service Manual Download

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F138-1074 (072020)

SERVICE MANUAL

MODULAR CRESCENT CUBER

KMD-210AB-HC

Summary of Contents for KMD-210AB-HC

Page 1: ...F138 1074 072020 SERVICE MANUAL MODULAR CRESCENT CUBER KMD 210AB HC...

Page 2: ...CHECK PROCEDURE 16 6 BIN CONTROL 17 a EXPLANATION OF OPERATION 17 b BIN CONTROL CHECK PROCEDURE 17 7 SWITCHES 18 a CONTROL SWITCH 18 b SERVICE SWITCH 18 III TECHNICAL INFORMATION 19 1 WATER CIRCUIT A...

Page 3: ...NTROL SERVICE SWITCH 48 b FUSE 48 c FUSE HOLDER 48 d CONTROL BOARD 48 e MAGNETIC CONTACTOR 48 f CONTROL BOARD TRANSFORMER 48 g STARTER 49 h RUN CAPACITOR 49 i START CAPACITOR 49 j CAPACITOR FOR PUMP M...

Page 4: ...1 I SPECIFICATIONS 1 DIMENSIONS SPECIFICATIONS...

Page 5: ...Water Supply Inlet Water Tank Cube Guide Pump Motor Float Switch Condenser Fan Motor Hot Gas Valve Compressor Control Box Expansion Valve Harvest Water Valve Fill Water Valve Control Switch Service Sw...

Page 6: ...30 or 50 seconds of harvest depending on S1 dip switch 7 8 setting LED 7 comes on when PM energizes At the end of harvest the control board checks the position of LF S and proceeds to the freeze cycl...

Page 7: ...le if it is closed or calls for a 1 minute fill if it is open The unit continues to cycle through c d and e sequence until the bin control is activated and shuts the unit down When the bin control is...

Page 8: ...dip Switch 5 6 Pump motor stops for 2 sec and then runs for 10 20 sec S1 dip switch 3 4 0 0 30 or 50 sec HWV energized COMP energized HGV energized HWV continues FWV de energized DV de energized COMP...

Page 9: ...ed 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 3 Do not touch the electronic d...

Page 10: ...7 a CONTROL BOARD LAYOUT 4 Harvest Water Valve 5 Freeze Water Valve 1 2 3 Float Switch P01771 02 Control Board Model KMD 210AB HC Part Number P01771 02 Type HKM2006V003...

Page 11: ...ater Safety The control board checks the position of the lower float switch at the end of the initial one minute water fill cycle and at the end of each harvest cycle If the lower float switch is in t...

Page 12: ...sec factory default setting Note The refill counter is deactivated before shipping The built in safeties shut down the unit and have alarms as listed below No of Beeps every 3 sec Type of Alarm Notes...

Page 13: ...d on program version S2 Dip Switch No 1 2 3 4 5 6 KMD 210AB HC ON OFF OFF OFF ON OFF Do not adjust the S2 dip switch These must be left in the factory default position or the unit will not operate pro...

Page 14: ...rol The drain 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 drain more often t...

Page 15: ...Motor Delay S2 dip switch 1 The pump out pump motor delay determines whether or not the pump motor de energizes for 2 seconds before restarting at the beginning of a drain cycle The pump out pump mot...

Page 16: ...he thermistor detects the temperature of the evaporator outlet to find overfreeze in a harvest cycle and at the beginning of a freeze cycle If the difference between the maximum temperature after the...

Page 17: ...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 dip switch s...

Page 18: ...ing located on the suction line next to the evaporator outlet Temperature F Temperature C Resistance k 0 18 14 401 10 12 10 613 32 0 6 000 50 10 3 871 70 21 2 474 90 32 1 633 Check a thermistor for re...

Page 19: ...solution See VI CLEANING AND MAINTENANCE INSTRUCTIONS c FLOAT SWITCH CHECK PROCEDURE Before replacing a float switch that you suspect is bad make sure the float switch has been cleaned This procedure...

Page 20: ...the machine to complete the freeze cycle and the following harvest cycle before shutting down the machine b BIN CONTROL CHECK PROCEDURE 1 Clear any ice away from the bin control 2 Make sure the contro...

Page 21: ...m two functions draining the tank DRAIN lower position and washing the icemaking compartment WASH or CIRCULATE upper or center position Both the WASH and CIRCULATE positions activate the same function...

Page 22: ...19 III TECHNICAL INFORMATION 1 WATER CIRCUIT AND REFRIGERANT CIRCUIT...

Page 23: ...20 2 WIRING DIAGRAM...

Page 24: ...E HARVEST CYCLE INCLUDING DRAIN BIN FULL FREEZE CYCLE FREEZE CYCLE FREEZE CYCLE HARVEST CYCLE INITIAL ON OFF 9 C 5 C Program Ver3 1 THERMISTOR COMPRESSOR ON OFF ON HARVEST CYCLE Thermistor senses 9 C...

Page 25: ...t fails to start harvest check for open float switch or bad 1 minute timer in board 4 Initial Harvest Cycle The harvest water valve remains energized contactor coil energizes to start the compressor a...

Page 26: ...tch connector from the control box 15 seconds after disconnecting the 3 pin float switch connector LED 5 comes on and refill begins Connect the 3 pin float switch connector back on the control box Whe...

Page 27: ...re f High Pressure Control 1 Bad contacts 1 Check for continuity and replace 2 Dirty air filter or condenser 2 Clean 3 Ambient or condenser water temperature too warm 3 Reduce temperature 4 Refrigeran...

Page 28: ...d through f below 1 Loose terminal 1 Tighten or replace 2 Voltage 2 Check and correct 3 Dirty condenser 3 Clean d Starter 1 Bad contacts 1 Check and replace 2 Coil winding opened 2 Replace e Compresso...

Page 29: ...l or Harvest Water Valve 1 Water valve is wide open during freeze 1 Check for water leaks with icemaker off f Expansion Valve 1 Operating erratically 1 Check and replace g Headmaster C P R remote air...

Page 30: ...f position 2 Place in position b Water System 1 Dirty 1 Clean 2 Water supply line too small requires 3 8 OD line dedicated per machine 2 Increase water line size 3 Water filter flow rate too small 3 R...

Page 31: ...irty 1 Clean c Water Quality 1 High hardness or contains impurities 1 Install a water filter or softener e OTHER PROBLEM POSSIBLE CAUSE REMEDY 1 Icemaker will not stop when bin is filled with ice a Bi...

Page 32: ...rier designed for R290 3 Handling of Handy Flux R290 Brazing is needed to connect the refrigeration circuit pipes It is no problem to use the same handy flux that has been used for the current refrige...

Page 33: ...to outdoors atmosphere without risk to the environment Recovery should only be considered if the unit cannot be taken outdoors to evacuate the circuit If R290 is recovered in a refrigerant recovery c...

Page 34: ...g line and cap off the access valve 9 Always cap the access valves to prevent a refrigerant leak 10 Always thoroughly leak test all joints and valve caps 11 Avoid charging large quantities of liquid i...

Page 35: ...ier until after all other repair or replacement has been made 1 Turn off the power supply 2 Remove the panels and water tank See V 14 WATER TANK 3 Remove the refrigerant from the unit and then any res...

Page 36: ...ealed 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 Remove the refrigerant from th...

Page 37: ...CIRCUIT 4 Disconnect the hot gas valve leads 5 Remove the screw and the solenoid coil 6 Remove the valve and drier using brazing equipment 7 Braze the new hot gas valve with nitrogen gas flowing at a...

Page 38: ...ngs while purging with nitrogen gas flowing at a pressure of 20 to 30 kPa WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating Do not braze with the valve...

Page 39: ...pop rivets securing the evaporator then lift out the evaporator 7 Install the new evaporator 8 Remove the drier then place the new drier in position 9 Braze all fittings while purging with nitrogen ga...

Page 40: ...re it in an approved container 7 Disconnect the capillary tube at the condenser outlet 8 Disconnect the flare connections of the valve 9 Remove the screws and the valve from the bracket 10 Install the...

Page 41: ...er range See the figure below 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 proper range verify the re...

Page 42: ...f the pump motor lead 4 Remove the thumbscrew securing the pump motor 5 Remove the hose band connecting the discharge hose 6 Slide the pump motor at right slightly and lift it up towards you Screw Fan...

Page 43: ...lose the washer 5 Disconnect the terminals from the valve 6 Remove the bracket and valve from the unit 7 Install the new valve Replace the removed parts in the reverse order of which they were remove...

Page 44: ...2 Loosen the two thumbscrews securing the pump motor bracket 3 Move the control switch to the SERVICE position Move the service switch to the DRAIN position 4 Let the icemaker run for 2 minutes 5 Mov...

Page 45: ...the panels in their correct positions 11 Turn on the power supply 15 FLOAT SWITCH 1 Remove the pump motor bracket See V 14 WATER TANK 2 Pull up the pump motor bracket from the water tank 3 Flip over t...

Page 46: ...IN CONTROL SWITCH CAUTION Do not drop or impact the bin control switch The reed switch inside may be damaged 1 Remove the water tank See V 14 WATER TANK 2 Disconnect the connector of the bin control s...

Page 47: ...ise ice may get between gaps and damage the bin control 8 Pull up any slack in the bin control lead then put the bushing attached to the bin control lead back into the hole in the base 9 Connect the b...

Page 48: ...m the suction pipe surfaces 7 Press a tube of the sealant KE4560RTV manufactured by Shin Etsu Silicones to the recess of the thermistor holder Slowly squeeze the sealant out of the tube and spread it...

Page 49: ...l 3 Remove the one mounting screw and pull the control box cover 4 Remove the two mounting screws and pivot the control box to the left side slightly and pull the control box towards you if needed 5 R...

Page 50: ...ecially make sure that the harness does not press the push buttons on the control board Control Box Cover Control Box Screw Screws Control Board Control Switch Service Switch Fuse Fuse Holder Starter...

Page 51: ...e four board supports secured to the control box to release the control board 3 Install the new control board in the reverse order of the removal procedure 4 Check the dip switch for proper setting 5...

Page 52: ...in the reverse order of the removal procedure 3 To prevent miswiring check the terminal numbers and lead wire colors with the wiring label i START CAPACITOR 1 Disconnect the terminals on the starter...

Page 53: ...ay tube to release the spray tube 5 Pull the spray tube towards you 6 The spray tube is easily cleanable by removing the black rubber caps on the ends 7 Remove the hose band connecting the water suppl...

Page 54: ...n the reverse order of the removal procedure Check for water leaks IMPORTANT Fit the spray guide securely and tightly on the evaporator fin Otherwise cloudy or irregular ice cubes or performance reduc...

Page 55: ...RVICE position for extended periods of time when the water tank is empty a CLEANING PROCEDURE 1 Dilute approximately 9 5 fl oz 281 ml of recommended cleaner Hoshizaki Scale Away or LIME A WAY Economic...

Page 56: ...connector from the side of the control box d Keep pushing up the snap tab at the right side of the pump motor bracket e Pull out the water tank cube guide pump motor bracket pump motor and float swit...

Page 57: ...nutes 17 Turn off the power supply and remove the front panel 18 Move the control switch to the ICE position 19 Replace the front panel in its correct position 20 Turn on the power supply to fill the...

Page 58: ...nel in their correct positions 6 Turn on the power supply to start the sanitizing process 7 Turn off the power supply after 15 minutes 8 Remove the front panel 9 Move the service switch to the DRAIN p...

Page 59: ...icemaker s performance will be reduced Check the filters at least twice a month When clogged use warm water and a neutral cleaner to wash the filters d CONDENSER AIR COOLED MODEL ONLY Check the conden...

Page 60: ...drain valve 9 Allow the line to drain by gravity 10 Attach compressed air or carbon dioxide supply to the condenser water supply line drain valve 11 Blow the condenser out using compressed air or car...

Page 61: ...place the front panel in its correct position and turn on the power supply for 2 minutes 4 Turn off the power supply and remove the front panel 5 Move the control switch to the OFF position 6 Replace...

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