IM-240ANE-HC Service Manual
Contents
1. 20 1 ERROR CODE ene 20 2 NO ERROR CODE INDICATION se ace 21 ADJUSTMENT EEN 23 1 EXPANSION VALVE eegene ehre 23 24 SUE 24 VIII REMOVAL AND 25 1 SERVICE FOR REFRIGERANT LINES 25 a SERVICE INFORMATION tet tes 25 b REFRIGERANT RECOVERY 26 REFRIGERANT REMOVAL 26 d EVACUATION AND BREEDE Eechelen 27 2 WELDING REPAIR FOR R290 REFRIGERATION CIRCUIT 28 EE Eeer 28 Weiz c 30 5 EXPANSION VALVE 30 6 EVAPORATOR 32 HOT CAS i e 33 WATER PAN ASSEMBLY eebe 34 PUMP WA te 36 10 WATER VALY E 36 MOTOR a 37 12 CAM 37 ARM A ACTUATOR MOTOR 5 37 BI CAM ARM B REAR SIDE see 37 i8 CONTROLLER BOARD 40 14 THERMISTOR FOR CUBE2. AC Low Voltage Lm DC Circuit AC High beem Voltage Circuit x1 5 x7 3 CN3 CNS 9 3 F1 Actuator Drive Output VH Connector 3P 220 240V AC Input Pump Motor Hot Gas Valve Fan Motor Water Valve VYH Connector 3P Compressor AC Relay Drive Output VH Connector 9P Fuse P01992 01 6 3A c BEFORE CHECKING CONTROLLER BOARD Check the power source voltage and the components as shown in the table below 1 Thermistor CAUTION 5 7 kilohms on evaporator Thermistor sensor part is fragile glass sealed Handle with care Holder Disconnect the connector CN13 on the board Remove the screw and the thermistor holder on the evaporator Immerse the sensor part in a glass containing ice and water for 5 minutes Check the resistance between CN13 connector pins Replace the thermistor in its correct position Connect CN13 Evaporator Thermistor 2 Bin Control Switch Manually set the micro switch in the Approx TRIP and RESET positions and TRIP Closed 10 sec check the period RESET Open 80 sec Ill OPERATING INSTRUCTIONS WARNING 1 This icemaker is designed to produce and store edible ice To keep the icemaker hygienic Wash your hands before removing ice Use the plastic scoop provided accessory The storage bin is for ice use only Do not store anything else in the bin Clean the storage bin before use see IV 1
3. osjo buioods AUD 199 9115 94 eopds PUD eui ut suonoeuuoo PUD suonoeuuoo 48 0M uo suononujsu 3y 22 y 0 6 EI Il GENERAL INFORMATION 1 CONSTRUCTION Top Panel Nameplate Louver Air Filter Power Cord Bin Door Handle Water Valve Hot Gas Valve lt L Air Cooled Condenser Control Box Actuator Motor Evaporator Water Plate Water Tank Gas Sensor prin Switch 2 CONTROLLER BOARD Note Refer to the controller board service manual IMPORTANT If receiving a service call ask the user to turn off the power to the icemaker and turn it on again while watching the icemaker This will reset the controller and in some cases normal operation will resume CAUTION Check that the icemaker has been earthed properly If not the controller board will not work properly Do not change wiring and connections or the controller board will not work properly Do not touch the reverse side of the controller board and tiny electronic devices on it Do not repair the el
4. 41 15 FAN MOTOR 42 16 GAS SENSOR 42 SPECIFICATIONS 1 DIMENSIONS SPECIFICATIONS Joud U 5 M x 0298 2 0 0 0 eunssejg Ajddng 1940M 2 55 5 duet Ajddng 1340M 2 09 dusel juetquy SNO 91nu 201 y 0464 0005 531 055322 90 39vMOvd 646g sso19 b g JON 509 0123130 5 9 2 01211098 eunsseJg eur 9snj 55010 JAWIL Tromm pipog Dia WIISAS 1041402 NB 29100009 403s u449u Jeuut 201s 0J49U 67v1 0623 Tou Wow SAJDA 19100 Mm 199 pub 19945 uo 1989900 241014 2 19 MOSES adh 0185 35 30 02 55344 35090 509 WAISAS INISINI 2945 180 Ti
5. HOSHIZAKI MODULAR CUBER MODEL 1 240 SERVICE MANUAL CONTENTS PAGE We e d 1 DIMENSIONS SPEGIFICATIONS ee 1 ii GENERAL INFORMATION sd uou rata a eae 2 1 CONSTRUCTION nanan nna 2 2 CONTROLLER BOARD 3 ja CONTROLLER BOARD LAYOUT 4 b INPUT OUTPUT 1 5 c BEFORE CHECKING CONTROLLER BOARD 6 jii OPERATING INSTRUCTION at 7 1 7 2 PREPARING THE ICEMAKER FOR LONG STORAGE 8 3 BIN CONTROL 9 BIN CONTROL SWITCH ASSEMBLY 9 DI REMOVAL P 10 J REASSEMBLING 10 V MAINTENANCE INSTRUCTIONS 11 1 PERIODICAL CLEANING eege 11 BEE 13 3 IGEMAKING WATER ee 14 TECHNICAL INFORMATION dee ier aea ors cient nae rui i ancor 17 1 WATER CIRCUIT AND REFRIGERANT CIRCUIT 17 2 WIRING DIAGRAM e MEM NM 18 esisi 19 Vi SERVICE DIAGNOSIS
6. RELAY X 2 di AY WATER dun VALVE 1 1 BR e d AgF CAP TT LaF CAP CN5 w RELAY RELAY LBU LIGHT BLUE DBU DARK BLUE GY GRAY GR Y GRERN YELLOV 3114901014 18 3 PERFORMANCE DATA Ice Production Capacity when shipped from factory Ambient Temp C Model Water Temp C Cube Hole Diameter 5mm 15mm 5mm 15mm 5mm 15mm 5mm 15mm IM 240ANE HC Ice Production kg d 210 235 195 210 170 190 130 140 Freeze Cycle Time min 18 5 15 5 20 5 17 5 24 5 20 5 32 1 28 5 Defrost Cycle Time min 3 5 2 5 3 0 2 5 2 5 2 0 1 9 1 5 Water Consumption lit h 27 5 32 6 13 0 15 8 11 8 14 3 9 6 10 9 Electric Consumption W 780 855 930 995 Head Pressure peak MPa bar 1 00 7 10 0 1 30 13 0 1 75 17 5 2 05 20 5 Suction Pressure and Evaporator Temp 50 60Hz Ambient Temp C 10 21 38 Water Temp C Suction Pressure Peak 240 kPa bar 250 2 5 300 3 0 350 3 5 400 4 0 Ee Inlet Temp C 16 15 15 15 Note The above data are only for reference in servicing Actual readings may be slightly different for each product Suction Pressure Peak readings in freezing cycle Evaporator Inlet Temp 5 minutes before completion of freezing cycle 19 VI SERVICE DIAGNOSIS 1 ERROR CODE INDICATION See the controller board service manual for detailed diagno
7. 2 Push the reset switch on the control box to open the water pan 3 Unplug the icemaker or disconnect the power source 4 Disconnect the pump motor leads in the wiring channel 5 Remove the two extension springs from the cam arms 6 Remove the water plate bracket and the water pan assembly 7 Remove the two spring hook screws from the water tank 8 Remove the screws and the water plate bracket 9 Remove the pump suction and discharge tubings 10 Remove the pump motor bracket from the water plate 11 Install the new water plate or water tank in the reverse order of the removal procedure 12 Replace the panels in their correct positions 13 Plug in the icemaker or connect the power source 34 INDEX gt OO JO Om P ON 51 4 55 DESCRIPTION Water Tank Water Plate Bracket Bracket Spring Hook Screw Pump Tubing Suction Pump Tubing Discharge Pump Motor Bracket Water Plate Overflow Pipe Thumbscrew for Overflow Pipe Nylon Tie O ring Pump Motor Assembly Tapping Screw Machine Screw Fig 11 35 9 PUMP MOTOR 1 Unplug the icemaker or disconnect the power source 2 Remove the top panel and front panel 3 Disconnect the pump motor leads in the wiring channel 4 Unscrew and remove the pump motor from the bracket 5 Disconnect the pump suction and discharge tubings 6 Install the new motor in the reverse order of the removal procedure 7 Plug in
8. 3 ICEMAKING WATER SYSTEM To keep the icemaker hygienic clean and sanitize the icemaking water system at least once every six months More frequent cleaning and sanitizing may be required depending on the water quality CAUTION Always wear rubber gloves eye protectors apron etc for safe handling of the cleaner and sanitizer Use the cleaners and sanitizers recommended by Hoshizaki Contact your local Hoshizaki office for further details The instructions below give an example of those recommended cleaners and sanitizers Never mix cleaning and sanitizing solutions in an attempt to shorten cleaning time Wipe off any splashed or spilt cleaner sanitizer immediately Do not use any ammonia type cleaners on any part of the icemaker When the ambient and water temperatures are 10 C or below the water pan may remain open Warm the icemaking compartment up to 20 C around the thermistor Be sure to follow the cleaning and sanitizing instructions below 1 Use a suitable container to dilute 236 ml of the cleaner Nickel Gate Ice Machine Cleaner by The Rectorseal Corporation with 11 4 lit of water 2 Open the storage bin door and remove all the ice to avoid contaminating by the cleaner 3 Remove the front and top panels 4 If the icemaker is in a defrost cycle wait until a freeze cycle starts 5 Close the water supply tap 6 Remove the screw and move the tank drain pipe to the drain position See Fi
9. PERIODICAL CLEANING Keep the scoop clean Clean it by using a neutral cleaner and rinse thoroughly Close the door after removing ice to prevent entrance of dirt dust or insects into the storage bin The use of any electrical equipment involves the observance of some fundamental rules In particular Instances of high humidity and moisture increase the risk of electrical short circuits and potential electrical shocks If in doubt disconnect the icemaker Do not pull the power cord in order to disconnect the icemaker from the feed network This appliance is not suitable for unsupervised use by young children or aged or infirm persons All parts are factory adjusted Improper adjustments may result in failure If the unit is turned off wait for at least 3 minutes before restarting the icemaker to prevent damage to the compressor Do not put your hands into the back of the storage bin or the ice chute on top of the storage bin Ice may drop off the icemaker a hard block of ice may suddenly break down or the icemaking mechanism may suddenly move resulting in injury 1 START UP 1 Disconnect the power supply 2 Open the water tap 3 Connect the power supply and energise 4 The following should occur sequence a Hot gas valve will open b Compressor will start Water pan will fully open d Water valve will open Water pan will start to close hot gas valve closed f Water pan fully
10. Stuck on other parts e g ice Remove ice guide Short circuit display shows Replace on Slab does not Extension spring Over extended Replace break into Water plate Obstacle caught between Remove obstacle separate cubes evaporator and water plate Icemaker will Bin control switch Out of position Place in position not stop when actuator Broken Replace bin is filled with Bin control switch Out of position Place in position ice Broken Replace Bin control switch Out of position Place in position detector Broken Replace Bin control micro Disconnected from switch box Reconnect switch Seizing with open contacts Replace Controller board Defective Replace Cloudy cubes Water quality High hardness Set hard water control Switch to full drain flush see note below Ice condition Slush ice Set slush ice control Note Full drain flush After a freeze cycle ends the unit drains all the remaining water in the tank and refills the tank in the next freeze cycle Partial drain flush default setting After a freeze cycle ends the unit leaves the remaining water in the tank and adds some water to fill the tank in the next freeze cycle 21 Problem Check Possible Cause Remedy Abnormal noise Pump motor Bearing worn out Replace Vapor lock Clean water valve filter Check water supply cycle time setting Fan motor Bear
11. any gas left inside the circuit WARNING It is recommended to use a pipe cutter when disconnecting the pipes to prevent accidents that can be caused by the flammable refrigerant in the oil left inside the pipes Note Attach an access valve for recharging the unit charged by a lock ring 3 COMPRESSOR 1 Unplug the icemaker or disconnect the power source 2 Remove the top front and right side panels 3 Remove the refrigerant from the unit and then any residual refrigerant still existing in the unit to allow welding process See 2 WELDING REPAIR FOR R290 REFRIGERATION CIRCUIT 4 Remove the terminal cover on the compressor and disconnect solderless terminals 28 5 Disconnect discharge and suction pipes using a pipe cutter near the compressor to keep the pipe length as much as possible If needed expand the end of disconnected pipes using a pipe expander to connect with the new compressor WARNING When it is required to disconnect the pipes using brazing equipment be careful that the refrigerant in the oil left inside the pipes may burn 6 Remove the hold down bolts washers and rubber grommets 7 Slide and remove the compressor Unpack the new compressor package 8 Attach the rubber grommets of the previous compressor 9 Clean the suction and discharge pipes with an abrasive cloth paper 10 Place the compressor in position and secure it using the bolts and washers 11 Remove plugs from the co
12. be careful that the refrigerant in the oil left inside the pipes may burn 6 Braze or solder the new drier with the arrow on the drier in the direction of the refrigerant flow Adjust the pipes to fit the drier Use nitrogen gas at the pressure of 0 2 0 3 bar when brazing tubings 7 Check for leaks using nitrogen gas 10 bar and soap bubbles 8 Evacuate the system and charge it with refrigerant See 1 d EVACUATION AND RECHARGE 9 Replace the panels in their correct positions 10 Plug in the icemaker or connect the power source Note Always use a drier of the correct capacity and refrigerant type 5 EXPANSION VALVE 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 30 1 Unplug the icemaker or disconnect power source 2 Remove the top front and right side panels 3 Remove the refrigerant from the unit and then any residual refrigerant still existing in the unit to allow welding process See 2 WELDING REPAIR FOR R290 REFRIGERATION CIRCUIT 4 Disconnect the outlet and inlet of expansion valve using a pipe cutter Disconnect the inlet side near the expansion valve to keep the pipe length as much as possible Disconnect the outlet side at the broken line in Fig 10 If needed expand the end of disconnected pipes using a pipe expander to connect with the new expansion
13. closed pump motor will start Water valve will close 2 PREPARING THE ICEMAKER FOR LONG STORAGE WARNING Drain the icemaker to prevent damage to the water supply line at subfreezing temperatures using air or carbon dioxide Shut off the icemaker until proper air temperature is resumed Normal Position 1 Close the water supply tap and remove the inlet hose 2 Remove the front panel 3 Remove the screw located on the front of the water tank Tank Drain Pipe 4 Move the tank drain pipe to the drain position See Fig 1 Drain Position 5 Push the reset switch The water pan will start to open 6 Blow out the water supply line immediately after the water pan has opened Note This procedure is necessary to protect the icemaker from freezing up at subfreezing temperature 7 Unplug the icemaker or disconnect the power source when the water pan has fully opened 8 Move the tank drain pipe to the normal position and secure it with the screw 9 Remove all ice from the storage bin and clean the bin 10 Replace the panels in their correct positions 11 Replace the inlet hose in its correct position 3 BIN CONTROL Bin control switch is mounted on the upper side of the storage bin This switch will turn off the unit automatically when the storage bin is full of ice Handle the bin control switch carefully because the switch assembly is fragile TUM Running Bin full Fragi
14. valve WARNING When it is required to disconnect the pipes using brazing equipment be careful that the refrigerant in the oil left inside the pipes may burn Protect the evaporator and pipes from excessive heat with damp cloths or similar 5 Remove the expansion valve sensor bulb 6 Remove the drier See 4 DRIER 7 Braze in the new expansion valve Adjust the pipes to fit the expansion valve Protect the body of the valve from excessive heat and use nitrogen at a pressure of 0 2 0 3 bar when brazing 8 Braze or solder the new drier See 4 DRIER 9 Check for leaks using nitrogen gas 10 bar and soap bubbles 10 Evacuate the system and charge it with refrigerant See 1 d EVACUATION AND RECHARGE 11 Attach the bulb to the suction line position Be sure to secure it using a wire or clamp and replace the insulation 12 Replace the panels in their correct positions Cap Nut Adjust Screw inside 13 Plug in the icemaker or connect the M power source High Side Fig 10 31 Capillary Tube 6 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 Unplug the icemaker or disconnect the power source 2 Remove the top front right and left side panels 3 Remove the refrigerant from the unit and then an
15. 5 1 Unplug the or disconnect the power source 2 Remove the top front and right side panels 3 Disconnect the connector of the fan motor 4 Remove the fan motor bracket and the fan motor 5 Cut the leads of the fan motor allowing enough lead length to reconnect using closed end connectors 6 Install the new fan motor in the reverse order of the removal procedure 7 Refit the panels in their correct positions 8 Plug in the icemaker or connect the power source 16 GAS SENSOR 1 Unplug the icemaker or disconnect the power source 2 Remove the front left side and bottom rear panels 3 Disconnect the connector at the back of the control box 4 Remove the screws securing the control box and front cover Pass the connector removed in 3 to the gas sensor inside the icemaking compartment 5 Remove the bracket from the frame and disconnect the gas sensor from the bracket 6 Attach the new gas sensor to the bracket and reattach the bracket to the frame 7 Connect the gas sensor leads to the connector at the back of the control box and tighten the screws of the control box and front cover 8 Refit the panels in their correct positions 9 Plug in the icemaker or connect the power source 42 Gas Sensor Screw Bracket Screw Fig 15 43
16. AM ARM A ACTUATOR MOTOR SIDE Refer to 11 ACTUATOR MOTOR b CAM ARM B REAR SIDE 1 Remove the top panel and front panel 2 Push the reset switch on the control box to open the water pan 3 Unplug the icemaker or disconnect the power source 4 Remove the extension spring from the cam arm B 5 Remove the split pin from the cam shaft 6 Remove the cam arm B 37 7 Install the new in the reverse order of the removal procedure 8 Replace the panels in their correct positions 9 Plug in the icemaker or connect the power source Fig 12 38 ICEMAKING ASSEMBLY AND CAM MECHANISM INDEX NO DESCRIPTION Water Pan Assembly Evaporator Bolt Collar Spacer Bearing Actuator Motor Shaft Actuator Motor Bracket Cam Shaft Bearing Spring Pin Cam Arm B Cam Shaft Snap Pin Split Pin Spring Washer A Washer B Washer C Thermistor Holder Label for Overflow Pipe Thermistor Cube Control Frame Frame Wire Saddle Washer Cam Arm A Change Lever Machine Screw 39 13 CONTROLLER BOARD IMPORTANT Some adjustment will be required for the controller board to fit the icemaker models Do not repair any parts and electronic devices on the controller board in the field Replace the whole board with a new service board 1 Unplug the icemaker or disconnect the power source 2 Remove the front panel 3 Unscrew and remove the control box cover 4 Disconnect a
17. ak a clean sponge or cloth with the solution and wipe the bin liner ice deflector and door inner surface 5 Rinse thoroughly with fresh water and a clean cloth to wipe off the solution Close the bin door Note Some solutions may cause damage to the bin liner surfaces or corrosion on the metal parts Always rinse the sanitiser unless directed otherwise by Hoshizaki guidelines 4 Air Filter Plastic mesh air filters remove dirt or dust from the air and keep the condenser from getting clogged If the filters get clogged the icemaker s performance will be reduced Remove and clean the air filters at least twice per month 1 Slide the air filter off the louver 2 Clean the air filter by using a vacuum cleaner When severely clogged use warm water and a neutral cleaner to wash the air filter 3 Rinse and dry the air filter thoroughly and place it in position Air Filter 12 2 WATER VALVE 1 Unplug the icemaker or disconnect the power source 2 Close the water supply tap 3 Remove the top panel and front panel 4 Disconnect the inlet hose from the water valve 5 Remove the mesh filter from the water valve 6 Clean the mesh using a brush 7 Replace the mesh and inlet hose in their correct positions 8 Open the shut off valve 9 Plug in the icemaker or connect the power source 10 Check for leaks 11 Replace the panels in their correct positions Do not remove Filter Inlet Hose Fig 6 13
18. at least once a year This appliance must not be cleaned by use of a water jet 1 PERIODICAL CLEANING 1 Machine and Bin Exterior Wipe the exterior at least once per week with a clean soft cloth Use a damp cloth containing a neutral cleaner to wipe off grease or dirt 2 Scoop and Storage Bin Handle Cleaning Sanitisation Daily 1 Either mix 3 litres of water with 11 ml of 5 2596 sodium hypochlorite solution in a suitable container or the recommended Hoshizaki sanitiser as directed 2 Soak the scoop in the solution for more than 3 minutes Rinse thoroughly and shake to remove surplus liquid Note Using a cloth to dry may re contaminate 3 Use a neutral cleaner to wash the storage bin handle Rinse thoroughly 4 Soak a clean cloth with the sanitising solution and wipe the handle Use fresh water and a clean cloth to rinse dry 3 Storage Bin Interior Cleaning Sanitisation Weekly 1 Open the storage bin door and remove all ice Note Hoshizaki recommends various types of storage bin for the icemaker which vary in size and design The following instructions are therefore for general guidance only 11 2 Wash the bin liner ice deflector and door inner surface with neutral non abrasive cleaner Rinse thoroughly with a clean cloth and fresh water 3 Either mix 5 litres of water with 18 ml of 5 2596 sodium hypochlorite solution in a suitable container or the recommended Hoshizaki sanitiser as directed 4 So
19. de manifold valve Any remaining liquid in the line can be charged into the low side 7 Do not charge more than 150 g of R290 8 Turn on the icemaker Release the high side access connector and allow pressure in the charging line to slowly enter the low side of the system Cap off the high side access valve When pressure reduces on the low side disconnect the low side charging 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 into the low side in case of damage to the compressor Depressed Cap Access Valve OPEN Fig 9 27 2 WELDING REPAIR FOR R290 REFRIGERATION CIRCUIT 1 Make sure the surrounding area of the unit to be repaired is free from ignition sources 2 Open the window or operate the ventilator to make the surrounding area well ventilated 3 Connect the piercing valve Recover the refrigerant in the specified manner or discharge it into the atmosphere 4 The refrigeration circuit pressure is back to atmospheric pressure Pressurize the circuit using nitrogen 5 Discharge the pressurized nitrogen and recover the refrigeration circuit to atmospheric pressure 6 Repeat 4 and 5 above Use a gas detector at the open end of refrigeration circuit to detect any gas left inside the circuit 7 Evacuate the refrigeration circuit for 30 minutes to remove
20. e been used for other refrigerants Otherwise wax and chlorine remaining on the parts may adversely affect the R290 25 6 Replacement Copper Tubing R290 The copper tubes currently in use are suitable for R290 But do not use them if oily inside The residual oil in copper tubes should be as little as possible Low residual oil type copper tubes are used in the shipped units 7 Evacuation Vacuum Pump and Refrigerant Charge R290 Never allow the oil in the vacuum pump to flow backward The vacuum level and vacuum pump may be the same as those for the current refrigerants However the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for R290 8 Refrigerant Leak Check Refrigerant leaks can be detected by charging the unit with a little refrigerant raising the pressure with nitrogen and using an electronic detector Do not use air or oxygen instead of nitrogen for this purpose or rise in pressure as well as in temperature may cause R290 to suddenly react with oxygen and explode Be sure to use nitrogen to prevent explosion b REFRIGERANT RECOVERY WARNING Do not recover the R290 refrigerant in a refrigerant recovery cylinder for R404A or R134a The R290 refrigerant has almost no effect on global warming so can be released to outdoors atmosphere without risk to the environment Recovery should only be considered if the unit cannot be taken outdoors to evacuate th
21. e circuit If R290 is recovered in a refrigerant recovery cylinder for R404A or R134a there is risk of ignition and a refrigerant destruction operator may reject collection c REFRIGERANT REMOVAL WARNING Remove the R290 refrigerant from the unit in an area well ventilated and free from open flames When removing the refrigerant from the unit be sure the surrounding area is well ventilated and free from open flames Discharge refrigerant in small amounts into the 26 atmosphere If the surrounding area is not well ventilated and exposed to open flames recover the refrigerant in a refrigerant recovery cylinder and discharge it in small amounts into the atmosphere outdoors d EVACUATION AND RECHARGE 1 Attach charging hoses service manifold and vacuum pump to the low side and high side to be fitted by service engineer access valves 2 Turn on the vacuum pump 3 Allow the vacuum pump to pull down to a 760 mmHg vacuum Evacuating period depends on the pump capacity 4 Close the low side and high side valves on the service manifold 5 Disconnect the vacuum pump and attach a refrigerant charging cylinder to accurately weigh in the liquid charge Remember to purge any air from the charging hose See the nameplate for the required refrigerant charge 6 Open the high side valve on the gauge manifold and accurately measure in the liquid charge Close the valve on the charging cylinder before closing the high si
22. e icemaker or disconnect the power source when the water pan has fully opened SANITIZING INSTRUCTIONS Note Sanitizing should always be completed after cleaning or alternately as an individual procedure if conditions exist to make it necessary 16 Use a suitable container to dilute 44 ml of 5 2596 sodium hypochlorite solution with 11 4 lit of water Alternatively use the Hoshizaki recommended sanitizer as directed by the relevant instructions 17 Close the water supply tap Plug in the icemaker or connect the power source When the 7 segment display on the controller board turns on press SW1 on the controller board for 3 seconds to start the flush mode 18 When the flush mode has started pour the cleaning solution prepared in 16 carefully into the water tank within 60 seconds before the pump motor starts Do not splash or spill the solution onto the other parts 15 19 Circulate the sanitizing solution for 15 minutes Push the reset switch to open the water pan Unplug the icemaker or disconnect the power source when the water pan has fully opened Wait until the sanitizing solution has completely drained out 20 Open the water supply tap and repeat the above step 9 Since the water supply tap is open this time water is supplied as in the normal freeze cycle 21 When the water pan closes again pour clean water into the water pan until it floods from the overflow pipe and circulate the water for 5 minutes 22 Pus
23. ectronic devices and parts on the controller board in the field except for fuse replacement Replace the whole board assembly when it fails To get static free always touch the metal part of the icemaker before servicing Electrostatic discharge will cause severe damage to the controller board The signal ground wire must be connected to the control box when replacing the controller board after service The controller board is fragile Handle with care Do not drop the board on the floor Make sure that the board is placed correctly into the guides in the control box Mis alignment could cause breakage when replacing the control box cover Handle the board by the edges only Do not touch the electric parts and devices CONTROLLER BOARD LAYOUT Main Board Sub Board Combination b INPUT OUTPUT LAYOUT 7 Segment Double Digit Display Reset Button L CN16 H 4 2 Hall IC Input XA Connector 4P Gas Sensor Signal Input Bin Control Switch Pressure Switch Input XA Connector 6P Gas Sensor Power Output 5V DC PA Connector 4P CN15 Cube Control Thermistor Input XA Connector 2P gt Data Input Output PA Connector 8P CN10 4 4 T 10 5V AC Input VH Connector 2P Close Button m 8
24. emove the refrigerant from the unit and then any residual refrigerant still existing in the unit to allow welding process See 2 WELDING REPAIR FOR R290 REFRIGERATION CIRCUIT 4 Disconnect the hot gas valve leads 5 Remove the screw and the solenoid coil 6 Disconnect the outlet and inlet of hot gas valve using a pipe cutter near the hot gas valve to keep the pipe length as much as possible If needed expand the end of disconnected pipes using a pipe expander to connect with the new hot gas valve WARNING When it is required to disconnect the pipes using brazing equipment be careful that the refrigerant in the oil left inside the pipes may burn 7 Adjust the pipes to fit the solenoid valve Braze the new hot gas valve with nitrogen gas flowing at the pressure of 0 2 0 3 bar 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 120 C 8 Install the new drier See 4 DRIER 9 Check for leaks using nitrogen gas 10 bar and soap bubbles 10 Evacuate the system and charge it with refrigerant See 1 d EVACUATION AND RECHARGE 33 11 Attach the solenoid to the valve body and secure it with the screw 12 Connect the leads 13 Replace the panels in their correct positions 14 Plug in the icemaker or connect the power source 8 WATER PAN ASSEMBLY 1 Remove the top front and left side panels
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26. g 1 7 Push the reset switch to open the water pan 8 Unplug the icemaker or disconnect the power source when the water pan has fully opened 14 9 After the water has completely drained out plug in the icemaker connect the power source When the 7 segment display on the controller board turns on press SW1 on the controller board for 3 seconds to start the flush mode See the controller board service manual for further details 10 When the flush mode has started pour the cleaning solution prepared in 1 carefully into the water tank within 60 seconds before the pump motor starts Do not splash or spill the solution onto the other parts 11 Circulate the cleaning solution for 30 minutes Push the reset switch to open the water pan Unplug the icemaker or disconnect the power source when the water pan has fully opened Wait until the cleaning solution has completely drained out 12 Open the water supply tap and repeat the above step 9 Since the water supply tap is open this time water is supplied as in the normal freeze cycle 13 When the water pan closes again pour clean water into the water pan until it floods from the overflow pipe and circulate the water for 5 minutes 14 Push the reset switch to open the water pan and drain the water This time the water does not drain out completely 15 Repeat the above steps 13 and 14 at least three times to rinse thoroughly To drain the rinse water completely unplug th
27. h the reset switch to open the water pan and drain the water This time the water does not drain out completely 23 Repeat the above steps 21 and 22 at least three times to rinse thoroughly To drain the rinse water completely unplug the icemaker or disconnect the power source when the water pan has fully opened 24 Move the tank drain pipe to the normal position and secure it with the screw See Fig 1 25 Plug in the icemaker or connect the power source Check for proper icemaking operation 26 Replace the front panel and top panel in their correct positions 27 Complete storage bin cleaning as detailed in IV 1 3 V TECHNICAL INFORMATION 1 WATER CIRCUIT AND REFRIGERANT CIRCUIT Water Controller Board Expansion Valve Bulb Water Pan Water Pump l HotGas X Valve Straine Pressure Switch Fan Motor Compressor Water Circuit Refrigerant Circuit 17 2 WIRING DIAGRAM WIRING DIAGRAM GAS SENSOR BR BIN CONTROL SWICTH At MUT BOARD 21 R T CONTROLLER BOARD POWER SUPPLY SEB NAMEPLATE FOR POWER VOLTAGE REQ GROUND LIVE GR Y Ww i 15 N1 DAE 4 FUSE 5 24 3121 SURGE ABSORBER GR Y TARISTOR CD aom 2 RELAY CNO PUMP MOTOR 2 PROTECTOR 15 43 fe DBU E RELAY m SOLENOID VALVE X4 DBU RELAY X3
28. horted for 2 seconds Replace Shut down thermistor Water regulator error Cooling water cannot stop by water regulator error and thermistor senses set point or lower temperature Press reset Continue switch Caution EE C2 Gas leakage High pressure Gas sensor detects gas leakage and error occurs in icemaking performance E1 or E2 Description Pressure switch senses 2 26MPa or higher pressure 20 Fan motor runs continuously and unit shuts down Press reset switch Operation Reset After 5 minutes pressure 1 52MPa or lower Compressor stops Description Operation Fan motor runs continuously and icemaking operation continues Fan motor runs continuously and icemaking operation continues Sensor sensitivity abnormal Sensor has abnormal sensitivity and sends false signal Replace sensor Sensor circuit open Sensor circuit is open and cannot detect gas leakage Replace sensor 2 NO ERROR CODE INDICATION Problem Check Possible Cause Remedy Icemaker will Power source Turned off Turn on not start Supply voltage too low Remove cause Power failure Wait until power is resumed Transformer Defective Replace Power cord Not connected properly Reconnect Open circuit damaged Replace Controller board Defective Replace Fuse Blown out Check for cause Replace Bin control switch
29. ing worn out Replace Fan touching obstacle Remove obstacle Actuator motor Gear worn out Replace Cubes drop Refrigeration Gas leaks long defrost cycle Repair separately circuit Cam arm Worn out Replace Imperfect ice Insufficient water Water valve filter clogged Clean production supply Water supply cycle too short Extend Water supply pressure too low Remove cause Water leaks from Water tank broken Replace water tank or Water plate broken Replace water plate Icemaker not level Adjust Water valve Water leaks from valve body Replace Water leaks from water supply Check hose clamp pipe joint Replace connection hose Water plate Spray holes clogged Unclog Pump motor Defective Replace Large hole Refrigeration Gas leaks low refrigeration Repair cubes circuit capacity Condenser Not clean low condensing Clean capacity Filter clogged Clean Fan motor Defective Replace Installation site No clearance at right side and rear Ensure clearance Ambient temperature above 40 C Ensure ventilation to lower temperature Power supply Supply voltage too low low refrigeration capacity Remove cause Water valve Water leaks Replace Insufficient water Water supply pressure too low Remove cause supply Freeze cycle time is too long Installation site Ambient temperature too high Ensure ventilation to lower
30. le Especially on removing ice do not touch ripped com or poke with a scoop water plate or Keep away from the water plate or drain Fia 2 drain pan pan to prevent jamming Ig a BIN CONTROL SWITCH ASSEMBLY Bracket Microswitch A Bracket Cover Switch Actuator Detector Fig 3 b REMOVAL BRACKET COVER Push the two pawls and remove the bracket e cover e SWITCH Pull out the switch holding the rubber leads cap Handle with care SWITCH ACTUATOR Insert a flat blade screwdriver and wrench it slightly to pull out the switch actuator Handle with care to prevent damage to the cam surface of the actuator DETECTOR Push out the detector holding the switch actuator c REASSEMBLING SWITCH ACTUATOR Insert the lower shaft and push it along the U notch Check that the switch actuator moves free SWITCH amp BRACKET COVER Place the switch lever first and then attach the switch in position Insert the guide and push the bracket cover to lock IV MAINTENANCE INSTRUCTIONS WARNING Before carrying out any cleaning or maintenance operations unplug the icemaker from the electrical supply network Before handling or using cleaning solutions check the guidelines on the product for advice on suitable personal protective clothing gloves goggles etc Clean and sanitize the icemaker water system at least twice a year and check and clean the condenser
31. ll the connectors from the controller board 5 Remove the controller board from the four board supports for connection to the control box 6 Install the new controller board in the reverse order of the removal procedure 7 Replace the front panel in its correct position 8 Plug in the icemaker or connect the power source 9 The icemaker restarts in the model setting mode Set the model code according to the controller board service manual Board __ Controller Board 4 Screw Control Box Cover Fig 13 40 14 THERMISTOR FOR CONTROL 1 Unplug the icemaker or disconnect the power source 2 Remove the top and front panels 3 Remove the connector CN13 on the controller board referring to 413 CONTROLLER BOARD 4 Unscrew and remove the thermistor holder and thermistor located on the evaporator front side 5 Install the new thermistor in the reverse order of the removal procedure by using a sealant high thermal conduct type See Fig 14 Note Recommended sealant is KE4560RTV manufactured by Shin Etsu Silicones When other type of sealant used the cube size and performance will be changed Do not use silicone sealant as this will insulate the thermistor Sealant Insert aluminum tape or foil between holder and sealant Sealant Aluminum Tape Holder Holder Thermistor and leads are FRAGILE HANDLE WITH CARE Evaporator Leads Thermistor Fig 14 41 1
32. mpressor suction and discharge pipes 12 Adjust the pipes to fit the compressor Braze or solder the access suction and discharge lines Do not change this order with nitrogen gas flowing at the pressure of 0 2 0 3 bar 13 Install the new drier See 4 DRIER 14 Check for leaks using nitrogen gas 10 bar and soap bubbles 15 Evacuate the system and charge it with refrigerant See 1 d EVACUATION AND RECHARGE 16 Connect the solderless terminals and replace the terminal cover in its correct position 17 Replace the panels in their correct positions 18 Plug in the icemaker or connect the power source Note Hoshizaki recommends that compressor starting electrics are always replaced at the same time as the compressor 29 4 DRIER 1 Unplug the icemaker disconnect power source 2 Remove the top front and right side panels 3 Remove the refrigerant from the unit and then any residual refrigerant still existing in the unit to allow welding process See 2 WELDING REPAIR FOR R290 REFRIGERATION CIRCUIT 4 Remove the drier holder if any and pull the drier toward you for easy service 5 Disconnect the outlet and inlet of drier using a pipe cutter near the drier to keep the pipe length as much as possible If needed expand the end of disconnected pipes using a pipe expander to connect with the new drier WARNING When it is required to disconnect the pipes using brazing equipment
33. nit drains all the remaining water in the tank and refills the tank in the next freeze cycle Partial drain flush default setting After a freeze cycle ends the unit leaves the remaining water in the tank and adds some water to fill the tank in the next freeze cycle 1 Remove the screw located on the front of the water tank Move the tank drain pipe to the drain position see Fig 8 Secure the tank drain pipe with the screw Normal Position Drain Position Tank Drain Pipe Fig 8 2 Change the following controller board settings from partial drain flush to full drain flush referring to 3 b MAINTENANCE in the IMN series controller board service manual E1CK 811 Full partial drain flush selection Maintenance mode No 14 0 full 1 partial Icemaking water supply time Maintenance mode No 12 Additional icemaking water supply time Maintenance mode No 15 3 DIMPLE DIAMETER See 2 i DIMPLE DIAMETER SETTING in the IMN series controller board service manual E1CK 811 24 REMOVAL AND REPLACEMENT WARNING Only trained service engineer can service the R290 refrigeration unit 1 SERVICE FOR REFRIGERANT LINES a SERVICE INFORMATION 1 Allowable Compressor Opening Time and Prevention of Lubricant Mixture R290 The compressor must not be opened more than 30 minutes in replacement or service Do not mix lubricants of different compressors even if both are cha
34. rged with the same refrigerant except when they use the same lubricant 2 Treatment for Refrigerant Leak R290 If a refrigerant leak occurs in the low side of an ice maker air may be drawn in Even if the low side pressure is higher than the atmospheric pressure in normal operation a continuous refrigerant leak will eventually reduce the low side pressure below the atmospheric pressure and will cause air suction Air contains a large amount of moisture and ester oil easily absorbs a lot of moisture If an ice maker charged with R290 has possibly drawn in air the drier must be replaced Be sure to use a drier 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 refrigerants However its entrance into the refrigerant circuit should be avoided as much as possible 4 Oil for Processing of Copper Tubing R290 When processing the copper tubing for service wipe off oil if any used by using alcohol or the like Do not use too much oil or let it into the tubing as wax contained in the oil will clog the capillary tubing 5 Service Parts for R290 Some parts used for refrigerants other than R290 are similar to those for R290 But never use any parts unless they are specified for R290 because their endurance against the refrigerant has not been evaluated Also for R290 do not use any parts that hav
35. sis and remedies error and caution codes other than E1 and 2 are indicated as in the 7 segment display at the time of occurrence But the error history is recorded as the actual error codes in parenthesis and a maximum of five errors are indicated from the latest entry Freeze error Description Freeze backup timer 45 60 minutes counts up before freeze cycle completes and evaporator temperature is 0 C or higher Operation Press reset Shut down switch Defrost error Defrost backup timer 30 minutes counts up before defrost cycle completes Press reset Shut down ewitch Water pan opening error Water pan has not fully opened within 60 seconds and 3 minutes have passed even with opening failure control Halt Press reset switch Unit resumes operation after 60 minutes and repeats the above error Shut down Water pan closing error Water pan has not fully closed within 60 seconds and 3 minutes have passed even with closing failure control Halt Press reset Unit resumes operation after 60 minutes and repeats the above error switch Shut down High temperature error Evaporator temperature stays 60 C or higher for 5 seconds or more Press reset Shut down switch Data error Model setting data memory IC is defective Replace Shut down controller board Cube control thermistor error Cube control thermistor circuit is open or s
36. temperature Condenser Not clean low condensing Clean capacity Filter clogged Clean Fan motor Defective Replace Refrigeration Gas leaks low refrigeration Repair circuit capacity 22 Vil ADJUSTMENT 1 EXPANSION VALVE WARNING To prevent possible refrigerant leakage do not make adjustments while the unit is running Stop the unit before making adjustments The expansion valve is factory adjusted Do not adjust it except at replacement or service Adjust the valve setting if necessary as follows 1 Remove the cap nut 2 Rotate the adjust screw by using a flat blade screwdriver 3 Watch holes of ice cubes produced Standard setting is that evaporator inlet side and outlet side cubes have almost the same diameters To make the inlet side larger rotate 90 180 clockwise Smaller counterclockwise Do not rotate more than 180 at a time CAUTION Over adjustment of the valve may result in liquid refrigerant return causing freezing to the suction line and severe damage to the compressor Bulb Adjust Screw Bottom View Cap Nut Capillary Tube Solder Connection Fig 7 23 2 FULL DRAIN FLUSH In some hard water areas white ice and scaling can be caused In such case install a filter or softener and change the flush mode from partial drain flush to full drain flush according to the following instructions Full drain flush After a freeze cycle ends the u
37. the icemaker or connect the power source and check for leaks 8 Replace the panels in their correct positions 10 WATER VALVE 1 Close the water supply tap 2 Unplug the icemaker or disconnect the power source 3 Remove the top panel and front panel 4 Disconnect the receptacle leads from the water valve 5 Remove the valve outlet tubing by releasing the clamp 6 Remove the inlet hose and water valve 7 Install the new valve in the reverse order of the removal procedure 8 Open the water supply tap 9 Plug in the icemaker or connect the power source 10 Check for leaks 11 Replace the panels in their correct positions Note When replacing parts disassemble as shown in Fig 6 and replace the defective parts 36 11 ACTUATOR MOTOR 1 Remove the top panel and front panel 2 Push the reset switch on the control box to open the water pan 3 Unplug the icemaker or disconnect the power source 4 Remove the extension spring actuator motor side from the cam arm 5 Disconnect the actuator motor leads in the wiring channel 6 Remove the actuator motor bracket 7 Remove the spring pin securing the shaft to the cam arm 8 Remove the actuator motor 9 Install the new actuator motor in the reverse order of the removal procedure 10 Check that the cam arm can move in the proper range 11 Replace the panels in their correct positions 12 Plug in the icemaker or connect the power source 12 CAM ARM C
38. y residual refrigerant still existing in the unit to allow welding process See 2 WELDING REPAIR FOR R290 REFRIGERATION CIRCUIT 4 Remove the water pan assembly referring to 8 WATER PAN ASSEMBLY 5 Disconnect the evaporator pipe using a pipe cutter WARNING When it is required to disconnect the pipes using brazing equipment be careful that the refrigerant in the oil left inside the pipes may burn Protect the expansion valve from excessive heat 6 Remove four nuts holding the evaporator 7 Install the new evaporator and secure it with the bolts collars spacer and nuts Adjust the length of the new evaporator pipe to fit the pipe disconnected in 5 If needed expand the pipe using a pipe expander 8 Install the new drier See 4 DRIER 9 Braze pipes with nitrogen gas flowing at the pressure of 0 2 0 3 bar 10 Check for leaks using nitrogen gas 10 bar and soap bubbles 11 Evacuate the system and charge it with refrigerant See 1 d EVACUATION AND RECHARGE 12 Replace the removed panels in their correct positions 13 Plug in the icemaker or connect the power source 32 7 HOT GAS VALVE 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 Unplug the icemaker or disconnect the power source 2 Remove the top front and right side panels 3 R
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