Service Manual
Contents
1. 35 B Component Service MMO 38 1 Upper Bearing Wear Check 39 2 Removal and Replacement of Extruding 39 3 Removal and Replacement of 40 4 Removal and Replacement of 40 5 Removal and Replacement of Mechanical Seal and Lower Housing 42 6 Removal and Replacement of Gear 43 V MOUS MAN IO sah 44 VI Preparing the Icemaker for Periods of 46 VIII DISpOS Al P 48 VIN Technical OM e 49 A Specification and Performance 49 1 FD 650MAH C air cooled aan a sa tonii bitu 49 2 FD 650MWH C water cooled P sna dab ros Proud DU ND E UEME DP Mae 50 3 FD 650MRH C remiole allscOO Bd 51 e 52 Important Safety Information Throughout this manual2. Test Lead SSS yellow Y V 1 J r N pis E 1 Compressor Delay Relay Ly 4 4 7 white orange W O Control Board K9 Connector Fig 1 d Float Switch See Fig 2 5VDC is present at CB K5 pin closest to K4 connector to CB K8 5 BK If 5VDC is not present replace CB When UFS and LFS are open 5VDC is present at CB K8 5 BK to K8 6 R UFS and K8 47 DBU LFS When UFS and LFS are closed OVDC is present at CB K8 5 BK to K8 6 R UFS and K8 7 DBU LFS For further float switch diagnostics see Float Switch Check and Cleaning CB K8 Connector B Multimeter Red positive test lead to VD 5 pin closest to Black Negative K4 connector Test Lead Red Positive Test Lead Control Board K8 Connector Float Switch BK Fig 2 4 CB 20VDC Output Bin Control Check that the BC green LED is on If not confirm that BC yellow LED is not flashing or steady If BC green or yellow LED is not on check for 20VDC at CB K6 1 to CB K6 3 BR See Fig 3 If 20VDC is not present replace CB If BC yellow LED is on or flashing move ice away from BC lens If no ice is present clean the lens with a warm clean damp cloth If BC green LED is not on see Bin Control Check Bin Control Sensor 20VDC Closed green LED on Brown BR 20VDC DBU to
3. When storing the icemaker for an extended time or in sub freezing temperatures follow the instructions below to prevent damage When the icemaker is not used for two or three days under normal conditions it is sufficient to only move the power switch to the OFF position When storing the appliance for extended time or in sub freezing temperatures follow the instructions below 1 Remove the water from the icemaker water supply line 1 Turn off the power supply then remove the front panel 2 Move the power switch to the OFF position 3 Close the icemaker water supply line shut off valve then open the icemaker water supply line drain valve 4 Allow the line to drain by gravity 5 Attach a compressed air or carbon dioxide supply to the icemaker water supply line drain valve 6 Move the control switch to the ICE position then move the power switch to the ON position Replace the front panel in its correct position then turn on the power supply 7 Blow the icemaker water line out using the compressed air or carbon dioxide supply 8 Close the icemaker water supply line drain valve 2 Drain the evaporator 1 Turn off the power supply then remove the front panel 2 Move the control switch to the DRAIN position then replace the front panel in its correct position 3 Turn on the power supply and allow the water system to drain for 5 minutes 4 Turn off the power supply then remove the front panel Move
4. P 9 W R Inlet Water Valve 8 O Control Transformer Input T SERVICE Button NIVHG 1 1 AWLL dst LLA 7 WIR L ovacii t ae i Purge Cycle Bypass K8 Connector 24VAC and 5VDC Control Transformer 24VAC Input 1 Control Transformer 24VAC Neutral 2 LBU Bin Control Mechanical or Jumper 3 to 4 GY Open 5VDC Closed OVDC gt Float Switch 5 dig eee Float Switch 6 R Open 5VDC to 5 BK Closed OVDC to 5 BK Lower Float Switch 7 DBU Open 5VDC to 5 BK Closed OVDC to 5 BK K7 Connector open POWER OK LED S1 Dip Switch C e K6 Connector 20VDC J2 Connector Open 5VDC Ground GND Terminals Fig 4 22 Bin Control Infrared Sensor dark blue DBU white W signal common brown BR ground Closed Open yellow LED off yellow LED flashing 20VDC DBU to BR or steady 20VDC DBU to W OVDC W to BR 20VDC DBU to
5. in the extruding head and the lower bearing in the housing should be replaced Instructions for removing the extruding head and housing are located later in this Fig 11 procedure Note Replacing the bearing requires a bearing press adaptor If one is not available replace the whole extruding head and housing 6 Replace the cutter and spout in their correct positions 7 Replace the panels in their correct positions 8 Turn on the power supply 2 Removal and Replacement of Extruding Head 1 Remove the front and top panels 2 Move the control switch to the DRAIN position and drain the water from the evaporator After the water has drained move the power switch to the OFF position then turn off the power supply 3 Remove the strap connecting the spout to the chute assembly then remove the spout 4 Remove the cutter 5 Remove the extruding head seal bolts and discard NOTICE The seal bolts are not reusable New seal bolts must be used 6 Lift off the extruding head 7 Place the new extruding head in place and tighten down with new seal bolts 8 Replace the cutter and spout in their correct positions 9 Move the power switch to the ON position 10 Replace the panels in their correct positions then turn on the power supply to start the automatic icemaking process 39 3 Removal and Replacement of Auger 1 Remove the front and top panels 2 Move the control switch to the DRAIN po
6. to neutral W If 115VAC is present and CDR contacts 3 W O and 5 W O do not close replace CDR See II C 3 c Compressor Delay Relay 5 min Ice Purge Timer Circuit Diagnosis FM FMR If 115VAC is present at CB K1 3 R to neutral W and FM FMR does not energize check FM FMR capacitor windings and bearings 16 6 Freeze Cycle COMP LED is on 5 min ice purge timer terminates CB SERVICE button pressed COMP LED is on GM LED remains on Comp energizes GM FM FMR and CDR continue Ice production begins 4 to 6 minutes after Comp energizes depending on ambient and water conditions Diagnosis Comp Check that COMP LED is on and that Comp energizes If COMP LED is off confirm 5 min ice purge timer has terminated Check for OVDC across CB K9 3 Y and CB 4 Y If 5VDC is present HPS contacts are open If high pressure switch is open CB sounds a 3 beep alarm See III B LED Lights and Alarm Safeties If HPS is closed check for 115VAC at CDR 7 O to CDR 8 W If 115VAC is present check CDR continuity between CDR 3 W O and CDR 5 W O If open replace CDR If closed and COMP LED remains off replace CB If COMP LED is on and Comp is off check for 115VAC at CB X1 BR wires to neutral W If 115VAC is present on one and not the other replace CB If 115VAC is present on both check Comp windings start relay and capacitors Note If CDR de energizes CB 9 5 W O and 9 6 W O cir
7. BR OVDC DBU to W 20VDC W to BR D Bin Control Check 1 Bin Control Sensor Check infrared IMPORTANT Make sure CB S1 dip switch 7 is in the ON position This allows the control board to monitor the bin control sensor 1 Turn off the power supply 2 Remove the front panel top panel and control box cover 3 Confirm that CB S1 dip switch 1 2 3 are in the proper position for your application See III C b Bin Control Shutdown Delay infrared sensor S1 dip switch 1 2 3 4 Confirm that BC is connected to CB K6 connector on the control board Wipe down BC sensor lens with a clean warm damp cloth 5 Move the control switch to the ICE position then move the power switch to the ON position 6 Turn on the power supply to start the automatic icemaking process Green LED confirms 20VDC power from CB K6 to BC and remains on constantly Diagnosis Confirm BC green LED is on If not and BC yellow LED is on or flashing move ice away from BC sensor If no ice is present and BC green LED is off check DC voltage at CB 1 to CB 3 BR If 20VDC is not present replace CB If 20VDC is present and BC green LED is off replace BC 7 Make sure CB GM LED is on There is a delay of at least 30 seconds before GM LED turns on after power up After GM LED turns on press CB SERVICE button to bypass the 5 minute ice purge cycle WARNING Risk of electric shock Care should be taken not to touch live te
8. Selector S1 dip switch 7 FD 650M_H C is factory set for bin control infrared sensor operation No adjustment is required WARNING Do not place S1 dip switch 7 in the OFF position or the unit will not shut down by bin control 51 Dip Switch Setting Bin Control Application Gear Motor Delay Mechanical Bin Control N A for these models Infrared Sensor 6 Bin Control Shutdown Delay mechanical S1 dip switch 8 N A for FD 650M_H C Do not adjust S1 Dip Switch Bin Control Shutdown Delay 9 Ne8 0 25 Seconds 6 7 Seconds 7 Factory Use S1 dip switch 9 amp 10 Factory set for optimum performance Do not adjust 33 D Switches The power switch and the control switch are used to control the icemaker They are located on the control box 1 Power Switch The power switch has 2 positions OFF and ON 2 Control Switch The control switch has 2 positions ICE and DRAIN 34 IV Refrigeration Circuit and Component Service Information A WARNING This appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire Move the power switch to the OFF position and turn off the power supply before servicing Place the disconnect if applicable in the off position Lockout Tagout to prevent the power supply from being turned back on inadvertently Power switch in OFF position does not de energize all loa
9. position and secure it with the thumbscrew 10 Move the power switch to the OFF position Turn off the power supply Legend BC bin control CB control board COMP compressor FM fan motor FMR fan motor remote GM gear motor Infrared Sensor LED Infrared Sensor Infrared Sensor Housing p Infrared Sensor LED Lens Fig 6 24 E Float Switch Check and Cleaning 1 Float Switch Check 1 Remove the front top and left side panels then move the control switch to the DRAIN position 2 After 3 min move the power switch to the OFF position and turn off the power supply 4 Remove the bell connectors from FS black BK dark blue DBU and red R wires Check for open continuity between black BK common and red R UFS and between black BK common and dark blue DBU LFS If both are open continue to step 5 If either are closed follow the steps in II E 2 Float Switch Cleaning After cleaning FS check UFS and LFS again Replace if necessary See Fig 7 5 Cap the FS BK R and DBU wires from the control box 6 Move the control switch to the ICE position and the power switch to the ON position then turn on the power supply 7 Once reservoir fills move the power switch to the OFF position then turn off the power supply 8 Check FS continuity again Both UFS and LFS should be closed Check for closed continuity between black BK common and red R UFS a
10. sure the lower mechanical seal is in place then place the evaporator in position Secure the evaporator to the lower housing using the allen head cap screws 13 Remove the drier then place the new drier in position 14 Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG 15 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 16 Evacuate the system and charge it with refrigerant For air cooled and water cooled models see the nameplate for the required refrigerant charge For remote models see the rating label inside the icemaker 17 Install the auger assembly with the upper part of the mechanical seal attached Secure the auger assembly using new seal bolts 18 Reconnect the water hoses spout and strap 19 Move the control switch to the ICE position and the power switch to the ON position 20 Turn on the power supply to start the automatic icemaking process 21 Check for water leaks 22 no water leaks are detected replace the panels in their correct positions 41 5 Removal and Replacement of Mechanical Seal and Lower Housing 5a Mechanical Seal 1 Remove the front and top panels 2 Move the control switch to the DRAIN position and drain the wat
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12. 5VDC is present and control switch is closed replace CB If DV energizes 24VAC present at CB K2 10 W BU to neutral LBU and water does not drain check for restricted DV and DV solenoid continuity Clean or replace as needed Diagnosis BC Confirm green LED is on If not and yellow LED is on or flashing move ice away from BC sensor If no ice is present clean the BC sensor lens with a warm clean damp cloth If cleaning the lens does not work see Bin Control Check 3 After all of the water has drained move control switch to the ICE position CB POWER OK LED and BC green LED are on 4 Fill Cycle WTRIN LED is on WV energizes 90 sec low water safety timer begins LFS closes Nothing occurs at this time Reservoir continues to fill until UFS closes Once UFS closes 90 sec low water safety timer terminates and 30 min freeze timer starts WV de energizes Diagnosis Check that WTRIN LED turns on and water fills the reservoir If not check for water supply line shut off valve closed restricted water filters and restricted WV screen Next check for 24VAC at CB K2 8 O to neutral LBU If 24VAC 15 not present replace CB If 24VAC is present turn off the power switch disconnect the WV wires and check WV solenoid continuity If open replace WV Reconnect WV wires move the power switch to the ON position then check that DV is not leaking by Confirm that WV shuts off when UFS closes Note Low Water Safet
13. BR 20VDC DBU to W OVDC W to BR White W Multimeter Red Positive Test Lead Bin Control Sensor 20VDC Open yellow LED flashing or steady 20VDC DBU to BR Dark Blue DBU OVDC DBU to W 20VDC W to BR Black Negative Test Lead Fig 3 K6 Connector Bin Control Sensor 20 5 24VAC Output Inlet Water Valve and Drain Valve a Inlet Water Valve When the control switch is in the ICE position WTRIN LED turns on and inlet water valve energizes If not check for 24VAC at CB K2 7 W R to a neutral LBU If 24VAC is present check for 24VAC at CB K2 8 O to neutral LBU If 24VAC is not present replace CB If 24VAC is present and inlet water valve does not energize turn off the power supply and check continuity across the inlet water valve solenoid If open replace inlet water valve b Drain Valve When the control switch is in the DRAIN position FLUSH drain LED turns on and drain valve energizes If not check for 24VAC at CB K2 7 W R to neutral LBU If 24VAC is present check for 24VAC at CB K2 10 W BU to neutral LBU If 24VAC is not present replace CB If 24VAC is present and drain valve does not energize turn off the power supply and check continuity across the drain valve solenoid If open replace drain valve 6 CB 115VAC Output Gear Motor and Compressor X1 Relay a Gear Motor When UFS closes GM LED turns on and gear motor energizes energizing compr
14. Hoshizaki America Inc Modular Flaker Models FD 650MAH C MWH C MRH C SERVICE MANUAL A Superior Degree of Reliability www hoshizaki com Number 73199 Issued 1 3 2014 A WARNING Only qualified service technicians should install and service the appliance To obtain the name and phone number of your local Hoshizaki Certified Service Representative visit www hoshizaki com No service should be undertaken until the technician has thoroughly read this Service Manual Failure to service and maintain the appliance in accordance with this manual will adversely affect safety performance component life and warranty coverage and may result in costly water damage Proper installation is the responsibility of the installer Product failure or property damage due to improper installation is not covered under warranty Hoshizaki provides this manual primarily to assist qualified service technicians in the service of the appliance Should the reader have any questions or concerns which have not been satisfactorily addressed please call send an e mail message or write to the Hoshizaki Technical Support Department for assistance Phone 1 800 233 1940 770 487 2331 Fax 1 800 843 1056 770 487 3360 E mail techsupport hoshizaki com HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Attn Hoshizaki Technical Support Department NOTE To expedite assistance all correspondence commu
15. Inspect for leakage around seal bolts Tighten see torque values below or replace as necessary Seal bolts must be replaced once removed because seal material is one time use only If new seal bolts do not have preapplied threadlocker apply Loctite 243 or equivalent threadlocker to seal bolt threads Torque for F 1001 and Smaller 11 1 ft Ib 15 Torque for F 1500 and Larger 25 8 ft lb 35 N m Tighten 2 times Allow at least 5 sec in between each tightening Close the water supply line shut off valve and drain the water system Clean the inlet water valve screen and clean and inspect the drain valve Water Hoses Inspect the water hoses and clean replace if necessary Condenser Inspect Clean if necessary by using a brush or vacuum cleaner Icemaker Inspect for oil spots loose components fasteners and wires Upper Bearing extruding head Upper Bearing extruding head Lower Bearing and O Ring lower housing Mechanical Seal Evaporator Cylinder Auger Check for wear using 02 round stock or pin gauge Replace both upper bearing and lower bearing if wear exceeds factory recommendations See the Service Manual for details Inspect Replace both upper bearing and lower bearing if wear exceeds factory recommendations Replace the mechanical seal if the seal s contact surfaces are worn cracked or scratched See the Service Manual for details 45 VI Preparing the Icemaker for Periods of Non Use NOTICE
16. J Thermostatic Expansion Valve Overflow Hose To Drain Drain Hose joe Drier i Cond Water il NM Inlet Water Cooled Cond lt lt _ Water High Pressure Switch Water Regulating Valve HORE Compressor Water Circuit Refrigerant Circuit 12 3 Remote Models MRH C Inlet Water Valve Water Supply Switch KJ v_Water Level JP N Reservoir Thermostatic Expansion Z Overflow Hose To Drain Drain Hose Remote Condenser Unit Air Cooled Condenser Coupling Headmaster Accumulator Condenser Fan Motor High Pressure Switch Coupling Compressor Water Circuit Refrigerant Circuit lagnosis Il Sequence of Operation and Service D Jojouu Ayoyes 0 14 ejouJ8J 10 0UJ ueJ HIN JO OW uej IN4 UIEJp AG ureJp 1a W9 youms yeoy Jeddn san Jossedujoo duio5 senunuoo sown 1 9 LA N peziBieue ep dwog 1 0349 uiq 58 Ajuo pezi amp jeue ep pezi amp ieue ep HIW WA
17. control switch is in the DRAIN position and check control switch continuity closed If OVDC is still not present replace CB b High Pressure Switch When the high pressure switch is closed OVDC is present at CB K5 pin closest to CB connector to CB K9 3 Y and CB K9 4 Y If OVDC is not present and high pressure switch is closed replace CB If high pressure switch is open CB sounds a 3 beep alarm See LED Lights and Alarm Safeties c Compressor Delay Relay 5 min Ice Purge Timer Circuit Gear motor energizes energizing compressor delay relay and starting 5 min ice purge timer When de energized 5VDC is present at CB K5 pin closest to CB K4 connector to CB K9 5 W O If 5VDC is not present replace CB When compressor delay relay energizes compressor delay relay 3 W O and 5 W O close and OVDC is present at CB K5 pin closest to CB K4 connector to CB K9 5 W O If 5VDC is present compressor control relay 3 W O and 5 W O are open If compressor delay relay de energizes after gear motor starts an 8 beep alarm occurs See III B LED Lights and Alarm Safeties CB K9 Connector Multimeter L Red positive test lead to m amp n pin closest to K4 connector Control Switch white black W BK Black Negative Test Lead c T T Red Positive gIIC ll High Pressure Switch m QJ Sc
18. cuit opens Comp de energizes and an 8 beep alarm occurs See LED Lights and Alarm Safeties 7 Refill Cycle Low Water Safety Cycle As ice is produced the water level in the reservoir drops UFS opens Nothing occurs at this time When LFS opens WV energizes 90 sec low water safety timer fill timer starts Comp GM and FM FMR continue When UFS closes WV de energizes 90 sec low water safety timer fill timer terminates and 30 min freeze timer resets If UFS remains open 90 sec after WV energizes fill timer exceeded a 90 sec shutdown cycle starts Comp de energizes and CB signals a 1 beep alarm every 5 sec 90 sec ice purge timer starts GM and FM FMR continue 90 sec purge timer terminates GM and FM FMR de energize WV and 1 beep alarm continue until UFS closes Diagnosis Check that WTRIN LED is on If not check LFS See Float Switch Check and Cleaning If LFS is open and WTRIN LED is off replace CB If WTRIN LED is on check that the reservoir fills If not check the water supply line restricted water filters WV solenoid restricted WV screen If WV is energized and refill exceeds 90 sec low water safety timer fill timer check DV leaking by UFS open See Float Switch Check and Cleaning Note Each time UFS closes 30 min freeze timer starts The 30 min freeze timer resets when UFS closes again If UFS does not close again within 30 min CB shuts down the unit and sounds a 5 b
19. d CNECK WR cH ER 18 D Bim ORO CROCK OT RE TU 23 E Float Switch Check og 25 25 Z Elat SWiteh Cleaning mee m 25 F Diagnostic TRD BS tah E EE 27 lll Controls A a 29 A E e eee 30 B LED Lights aid Alarmi Sane Rm 31 C Settings AdjJUStMEN S 32 Default DID Settings iouis e koI PIRE ERU cated ICH ERE Id P PRESE RE CHAR CEN UMS 32 2 Bin Control Shutdown Delay infrared sensor S1 dip switch 1 2 3 32 3 Drain Frequency Control 51 dip switch 4 33 4 Continuous Dispensing Timer 51 dip switch 5 4 6 33 5 Bin Control Selector S1 dip switch 7 33 6 Bin Control Shutdown Delay mechanical 51 dip switch 8 33 7 Factory Use S1 dip switch 9 amp LEFRU 33 MEME 34 de ele cee 34 2 OME oe WN Ue 34 IV Refrigeration Circuit and Component Service Information 35 A Refrigeration Circuit Service Information
20. ds CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after the appliance is serviced Make sure that none have fallen into the dispenser unit ice storage bin Make sure all food zones in the icemaker and dispenser unit ice storage bin are clean after service A Refrigeration Circuit Service Information A WARNING Repairs requiring the refrigeration circuit to be opened must be performed by properly trained and EPA certified service personnel Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG Do not use R 404A as a mixture with pressurized air for leak testing NOTICE Always recover the refrigerant and store it in an approved container Do not discharge the refrigerant into the atmosphere Do not leave the system open for longer than 15 min when replacing or servicing parts The Polyol Ester POE oils used in R 404A applications can absorb moisture quickly Therefore it is important to prevent moisture from entering the system when replacing or servicing parts Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made Install the new drier with the arrow on the drier in the direction of the refrigerant flow Wh
21. e Models Inlet Water Valve EE aly TE EI Pre Spout Hp Evaporator E LA perm aim IE Expansion Valve SM 1 D i rain Valve Gear Motor Ice Chute Bin Control Infrared Sensor Control Box 4 En Compressor _ Accumulator Reciever 4 Ice Making Unit Cutter Extruding Head Upper Bearing Seal Bolt ___ 5 Auger Cylinder Insulation Mechanical Seal O Ring Socket Head Cap Screw Housing Lower Bearing Hex Bolt Spline Coupling Gear Motor B Water Refrigeration Circuit Diagram 1 Air Cooled Models MAH C Inlet Water Valve Water Suppl ater Supply Float Switch Water Level pm z Reservoir A MEN 4 Thermostatic Overflow Hose Gear Motor Drain Pan To Drain Condenser Fan Motor Air Cooled Condenser 11 High Pressure Switch Compressor Water Circuit Refrigerant Circuit Expansion Valve 2 Water Cooled Models MWH C Inlet Water Valve Water Supply Float Switch A Water Level Reservoir
22. e left side and top panels in their correct positions 25 7 Turn on the power supply then move the power switch to the ON position to start teh automatic icemaking process 8 Replace the front panel in its correct position Legend FS float switch LFS lower float switch UFS upper float switch Red 8 upper float switch Black BK cm common Dark Blue DBU lower float switch Magnet towards top Upper Float blue Spring Retainer Clip Magnet towards top Lower Float white Plastic Retainer Clip Float Switch Assembly Reservoir Cover E Fig 8 26 Diagnostic Tables Before consulting the diagnostic charts check for correct installation proper voltage per appliance nameplate and adequate water supply Check control board using the steps in Control Board Check 1 No Ice Production No Ice Production Possible Cause b Not within specifications 1 Power Supply Off blown fuse or tripped breaker b External water filters restricted 2 Water Supply a Water supply off or improper water pressure 10 to 113 PSIG 3 Power Switch 4 Control Transformer 115VAC 24VAC 5 Fuse 1A 6 Control Board See Control Board Check 7 Control Switch OFF position Defective Coil winding open or shorted 2 a Blown a Defective In DRAIN position Defective Control board defective C l
23. e spline coupling from the old gear motor and attach to the new gear motor 8 Install the new gear motor and connect the electrical wires 9 Lower the evaporator down and secure it to the gear motor 10 11 Replace the spout and strap in their correct positions Move the control switch to the ICE position then move the power switch to the ON position 12 Turn on the power supply to start the automatic icemaking process 13 Check for water leaks 14 If no water leaks are detected replace the panels in their correct positions 43 V Maintenance The maintenance schedule below is a guideline More frequent maintenance may be required depending on water quality the appliance s environment and local sanitation regulations WARNING Only qualified service technicians should service the appliance To reduce the risk of electric shock do not touch the icemaker power switch or control switch with damp hands Before Servicing Move the icemaker s power switch to the OFF position Turn off the power supply Place the disconnect if applicable 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 appliance Make sure that none have fallen into the dispenser unit ice storage bin Do not place fingers or any other objects into the ice di
24. earing Wear Check Replace if Lower Bearings necessary When replacing the upper bearing it is advised to also change the lower bearing at the same time Evaporator Install a new drier Inspect the mechanical seal and O ring prior to installing the new evaporator If worn cracked or scratched the mechanical seal should also be replaced Gear Motor Install a new gear motor capacitor Evaporator Assembly cee Cutter Extruding Head Upper Bearing Auger pem Seal Bolt of fo Evaporator mE Socket Head Cap Screw with Washer Fig 10 e ES Mechanical Seal Housing Barrier Lower Bearing Spline Coupling Gear Motor 1 Upper Bearing Wear Check To ensure that the bearing inside the extruding head does not exceed the wear tolerance of 02 follow the instructions below See Fig 11 1 Turn off the power supply 2 Remove the front and top panels 3 Remove the strap connecting the spout to the chute assembly then remove the spout 4 Remove the cutter from the auger 02 Round Stock 5 Grasp the top of the auger and move the auger towards you and then try to insert a 02 round stock or pin gauge in between the back side of the auger shaft and the bearing surface Check several locations around the auger shaft If the gauge goes between the shaft and the bearing at any point or if the bearing is scratched or cracked both the top bearing
25. eep alarm every 5 sec See III B LED Lights and Alarm Safeties 10 Shutdown Use an object to cover BC sensor at the bottom of the icemaker If the bottom of the icemaker is not accessible in your application remove the thumbscrew securing BC housing remove the housing from the base then cover BC sensor The yellow LED on BC sensor turns on flashing or steady The yellow LED flashes when ice is at the outer limit of its range and turns steady as ice nears After the yellow LED turns on flashing or steady BC shutdown delay timer starts When the BC shutdown delay timer terminates CB shuts down icemaker See Bin Control Check Legend BC bin control CB control board CDR compressor delay relay Comp compressor DV drain valve FM fan motor FMR fan motor remote GM gear motor LFS lower float switch UFS upper float switch WV inlet water valve 17 Control Board Check 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 Before diagnosing the control board drain the reservoir 1 Check 51 dip switch settings to assure that they are in the factory default position For factory default settings see Default Dip Switch Settings 2 Move the power switch to the ON position and move the control switch to the ICE position The POWER OK LED turns on Diagno
26. eezing Normal operating ambient temperature must be within 45 F to 100 F 7 C to 38 C Do not leave the icemaker on during extended periods of non use extended absences or in sub freezing temperatures To properly prepare the icemaker for these occasions follow the instructions in VI Preparing the Icemaker for Periods of Non Use Do not place objects on top of the appliance The dispenser unit ice storage bin is for ice use only Do not store anything else in the dispenser unit ice storage bin I Construction and Water Refrigeration Circuit Diagram A Construction 1 Air Cooled Models MAH C Inlet Water Valve Spout Control Box a 21 Thermostatic M Ha Expansion Air Cooled Valve 5 4 Condenser Drain Valve _LL_ LURE L7 e Fan Motor Gear Motor Ice Chute Drier Bin Control Infrared Sensor Compressor 2 Water Cooled Models MWH C Inlet Water Valve Spout Control Box Evaporator Thermostatic 4 NUS Water Expansion OG Fi 5929 Regulating Valve Ne 6 we Valve n E sien e H Water Cooled Drain Valve 2 5 sp H Condenser Gear Motor Drier Ice Chute Bin Control Infrared Sensor Compressor 3 Remot
27. en 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 Using proper refrigerant practices recover the refrigerant Recover via the access valves Store the refrigerant in an approved container Do not discharge the refrigerant into the atmosphere 35 2 Brazing WARNING R 404A itself is not flammable at atmospheric pressure and temperatures up to 176 F 80 C e R 404A itself is not explosive or poisonous However when exposed to high temperatures open flames R 404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous Do not use silver alloy or copper alloy containing arsenic 1 Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG 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 250 121 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 ni
28. er from the evaporator After the water has drained move the power switch to the OFF position then turn off the power supply 3 Remove the strap connecting the spout to the chute assembly then remove the spout 4 Loosen the cutter Do not remove at this time 5 Remove the extruding head seal bolts and discard NOTICE The seal bolts are not reusable New seal bolts must be used 6 Using the cutter lift out the auger assembly 7 The mechanical seal consists of two parts One moves along with the auger and the other is fixed on the lower housing NOTICE If the contact surfaces of these two parts are worn cracked or scratched the mechanical seal may cause water leaks and should be replaced 8 Remove the allen head cap screws securing the evaporator to the lower housing 9 Raise the evaporator up to access the lower housing 10 Remove the mechanical seal from the housing If only replacing the mechanical seal proceed to step 12 NOTICE To help prevent water leaks be careful not to damage the surfaces of the O ring or mechanical seal 5b Lower Housing 11 Remove the O ring and the bolts securing the housing to the gear motor and remove the housing from the gear motor If inspection of the upper bearing inside the extruding head see IV B 1 Upper Bearing Wear Check indicates that it is out of tolerance replace both it and the bearing inside the lower housing Note Replacing the bearing requires a bearing press adapt
29. essor delay relay closing 5 min ice purge timer 5VDC circuit and starting 5 min ice purge timer Confirm 115VAC at CB K1 2 BR to neutral W If 115VAC is not present check for loose connection from power switch If 115VAC is present check for 115VAC at CB K1 3 R to neutral W If 115VAC is not present replace CB b Compressor X1 Relay When 5 min ice purge timer terminates CDR energized for 5 min or SERVICE button is pressed COMP LED turns on and X1 relay energizes energizing compressor Confirm 115VAC at X1 BR wire to neutral W If 115VAC is not present check for loose connection If 115VAC is present check for 115VAC at X1 BK to neutral W If 115VAC is not present and COMP LED is on replace CB Note If CDR de energizes CB K9 5 W O and CB K9 6 W O circuit opens Comp de energizes and an 8 beep alarm occurs See III B LED Lights and Alarm Safeties Legend CB control board CT control transformer 21 Control Switch 1 to 2 W BK ICE Open 5VDC DRAIN Closed OVDC High Pressure Switch 3 to 4 Y Open 5VDC Closed OVDC Compressor Delay Relay Circuit 5 to 6 W O Relay De Energized Open 5VDC Relay Energized Closed OVDC K9 Connector X1 Relay O _ 115VAC input BR Comp BR K1 Connector 115VAC 3 GM FM FMR R 322 Input BR K2 Connector 24VAC Drain Valve 10 W BU Control
30. gerant 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 Remove the front and top panels 2 Move the control switch to the DRAIN position and drain the water from the evaporator After the water has drained move the power switch to the OFF position then turn off the power supply 3 Recover the refrigerant and store it in an approved container 4 5 6 Remove the seal bolts securing the extruding head Using the cutter lift out the auger assembly NOTICE The seal bolts are not reusable New seal bolts must be used Remove the strap connecting the spout to the chute assembly then remove the spout Disconnect the water hoses 40 7 Remove the insulation and the thermostatic expansion valve bulb on the suction line 8 Disconnect the inlet and outlet tubing 9 Remove the allen head cap screws securing the evaporator to the lower housing 10 Lift off the evaporator 11 Inspect the mechanical seal and O ring prior to installing the new evaporator The mechanical seal consists of two parts One moves along with the auger and the other is fixed on the lower housing NOTICE If the contact surfaces of these two parts are worn cracked or scratched the mechanical seal may cause water leaks and should be replaced Instructions for removing the mechanical seal and lower housing are located later in this procedure 12 Make
31. heet APPROXIMATE Ambient Water Temp F C ICE PRODUCTION Temp F 50 10 21 90 32 PER 24 HR Ibs day kg day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR gal day l day EVAPORATOR OUTLET TEMP HEAD PRESSURE PSIG kg cm G SUCTION PRESSURE PSIG kg cm G TOTAL HEAT OF REJECTION 6800 BTU h AT 90 F WT 70 F 2 FD 650MWH C water cooled AWAITING DATA 50 3 FD 650MRH C remote air cooled AWAITING DATA 51 B Wiring Diagrams FD 650MAH C FD 650MWH C FD 650MRH C BR 8 115 60 CRANKCASE sho BR HEATER BR REMOTE REMOTE POWER P P BIO BIO Ln SWITCH 3 INTERNAL DI P BR w PROTECTOR START CAP W SIT BR c Wo um RUN CAP 29 i 35MrD 5 BR H 127 0 1 8 GY BR BR BR COMPRESSOR GEAR MOTOR INTERNAL DELAY RELAY FUSE 20MFD Gy 2A R BR y 0 0 FIELD WIRING iube as
32. ide FAN MOTOR ATR i i BR BR up FIELD EE gn W WIRING m ey CONTROL TRANSFORMER aso FUSE LBU QUU LBU usu LBU INLET DRAIN 2 WIR mis e VALVE R R VALVE BR BR BR BR BR W BU T 0 0 R BR WR W R W R W R WR W BU on CONTROL SWITCH 3 o 0 o COM 2345676910 23 7 RELAY OPEN ICE Litsvacl 24 40 2 CLOSED DRAIN M ig i W BK 8 CONTROL BOAR INFRARED sensor ks KT K8 5VDC3 v 2 HI PRESS SWITCH KB 5VDC 24146 4 7 Jioc 98765432 8765432 f Ho 4 00000000 9 09 9 9 6 BU R BK DBU WR LBU LBU UPPER ei FLOAT LOWER switcy wo Mo 0 W O S DIP SWITCH SETTING 2 3 4 5 6 1 8 9 FD 650M_H C ON OFF OFF OFF OFF OFF ON ON OFF es
33. inder then place it on the scales Open the high side valve on the gauge manifold 7 Allow the system to charge with liquid until the proper charge weight is met 8 If necessary add any remaining charge to the system through the low side NOTICE To prevent compressor damage use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low side refrigerant access valve with the icemaker running 9 Close the high and low side gauge manifold valves then disconnect the gauge manifold hoses 10 Cap the refrigerant access valves to prevent a possible leak 37 B Component Service Information NOTICE When replacing a component listed below see the notes to help ensure proper operation When replacing evaporator assembly and water circuit components make sure there are no water leaks after the repair is complete Seal bolts must be replaced once removed because seal material is one time use only If new seal bolts do not have preapplied threadlocker apply Loctite 243 or equivalent threadlocker to seal bolt threads Tighten to the torque values listed below Torque for F 1001 and Smaller 11 1 ft lb 15 N m Torque for F 1500 and Larger 25 8 ft Ib 35 N m Tighten 2 times Allow at least 5 sec in between each tightening Component Install a new drier start capacitor and start relay Upper and Inspect the upper bearing for wear See IV B 1 Upper B
34. itch 3 amp 4 Y Open 5VDC Closed OVDC Compressor Delay Relay Circuit 5 amp 6 W O Relay De Energized Open 5VDC Relay Energized Closed OVDC K9 Connector NIVHG t 52 SERVICE Button Ice Purge Cycle Bypass K8 Connector 24VAC and 5VDC Control Transformer 24VAC Input 1 W R Control Transformer 24VAC Neutral 2 LBU Bin Control Mechanical or Jumper 3 to 4 GY Open 5VDC Closed OVDC oT TT T Float Switch T NIDA TOM UT Tu 55 BK _ Upper Float Switch 6 R to 5 Closed OVDC to 5 LEA Lower Float Switch 7 Open 5VDC to 5 BK Closed OVDC to 5 BK K7 Connector Open TO POWER LED 51 Dip Switch HITE J2 Connector Open 5VDC Ground GND Terminals Fig 9 30 K6 Connector 20VDC Bin Control Infrared Sensor dark blue DBU white W signal common brown BR ground Closed Open yellow LED off yellow LED flashing 20VDC DBU to BR or steady 20VDC DBU
35. ldren should be properly supervised around the appliance Do not climb stand or hang on the appliance or allow children or animals to do so Serious injury could occur or the appliance could be damaged Do not use combustible spray or place volatile or flammable substances near the appliance They might catch fire Keep the area around the appliance clean Dirt dust or insects in the appliance could cause harm to individuals or damage to the appliance Additional Warning for Remote Models THE REMOTE CONDENSER UNIT MUST BE GROUNDED The power supply and ground connection to the remote condenser unit are supplied from the icemaker Failure to properly ground the remote condenser unit could result in death or serious injury Wire routing conduit and disconnect if required must meet national state and local electrical code requirements Failure to meet these code requirements could result in death electric shock serious injury fire or damage Move the icemaker power switch to the OFF position and turn off the power supply to the icemaker before servicing the remote condenser unit Lockout Tagout to prevent the power supply from being turned back on inadvertently NOTICE Follow the instructions in this manual carefully to reduce the risk of costly water damage In areas where water damage is a concern install in a contained area with a floor drain Install the appliance in a location that stays above fr
36. nd between black BK common and dark blue DBU LFS If either are open follow the steps in 2 Float Switch Cleaning After cleaning FS check UFS and LFS again Replace if necessary 9 Reconnect the FS wires to the appropriate appliance wires BK to BK R to R and DBU to DBU 10 Replace the left side and top panels in their correct positions 11 Turn on the power supply then move the power switch to the ON position to start the automatic icemaking process 12 Replace the front panel in its correct position 2 Float Switch Cleaning Depending on water conditions scale may build up on FS Scale on the switch can cause inconsistent operation of UFS and LFS In this case FS should be cleaned and checked 1 Remove the front top and left side panels Move the power switch to the OFF position then turn off the power supply 2 Remove FS assembly from the reservoir cover See Fig 8 3 Wipe down FS assembly with a mixture of 1 part Hoshizaki Scale Away and 25 parts warm water 4 While not necessary the floats can be removed from the shaft during cleaning If you remove them note that the blue float is on top The floats must be installed with the magnets inside them towards the top of the switch See Fig 7 Installing the floats upside down will affect the timing of the float switch operation 5 Rinse FS assembly thoroughly with clean water and replace in its original position 6 Replace th
37. nication MUST include the following information Model Number Serial Number Complete and detailed explanation of the problem IMPORTANT This manual should be read carefully before the appliance is service Read the warnings and guidelines contained in this manual carefully as they provide essential information for the continued safe use service and maintenance of the appliance Retain this manual for any further reference that may be necessary CONTENTS Important Satety T 5 I Construction and Water Refrigeration Circuit Diagram 7 SUG RE M NN T 1 Air Cooled Models 7 2 Water Cooled Models 8 3 Remote Models 9 21 166 Making fT H 10 Water Refrigeration Circuit DISOESITI 11 1 Air Cooled Models isses nen Exp n ER FEE EERXRR SEE RERME 11 2 Water Cooled Models MWH O 12 3 Remote Models 13 Sequence of Operation and Service 14 Sequence of Operation Flow ete eee 14 LM a ME 15 C Control Boar
38. notices appear to bring your attention to situations which could result in death serious injury damage to the appliance or damage to property A WARNING Indicates a hazardous situation which could result in death or serious injury NOTICE Indicates a situation which could result in damage to the appliance or property IMPORTANT Indicates important information about the use and care of the appliance WARNING The appliance should be destined only to the use for which it has been expressly conceived Any other use should be considered improper and therefore dangerous The manufacturer cannot be held responsible for injury or damage resulting from improper incorrect and unreasonable use Failure to service and maintain the appliance in accordance with this manual will adversely affect safety performance component life and warranty coverage and may result in costly water damage To reduce the risk of death electric shock serious injury or fire follow basic precautions including the following Only qualified service technicians should install and service the appliance The appliance must be installed in accordance with applicable national state and local codes and regulations Failure to meet these code requirements could result in death electric shock serious injury fire or damage to the appliance Electrical connection must be hard wired and must meet national state and local electrical code requirements Fail
39. ontrol a Dirty or misaligned See Bin Control Check b Defective c Control board defective 2 Control Board a Defective See Control Board Check 1 Drain Water Valve 2 Control Board a Defective See Control Board Check 28 Controls and Adjustments A Hoshizaki exclusive control board is employed in Hoshizaki icemakers All models are pretested and factory adjusted e For a control board check procedure see Control Board Check NOTICE Fragile handle very carefully The control board contains integrated circuits which are susceptible to failure due to static discharge It is especially important to touch the metal part of the icemaker when handling or replacing the control board Do not touch the electronic devices on the control board or the back of the control board Do not change wiring and connections Do not misconnect terminals Do not short out power supply to test for voltage Always replace the whole control board assembly if it goes bad 29 A Control Board Layout X1 Relay 115VAC input BR Comp BR K1 Connector X2 Relay 3 GM FM FMR R 2 Input BR K2 Connector Drain Valve 10 W BU Control Transformer Input 9 W R Inlet Water Valve 8 O Conrol Transformer Input 37 W R F A Control Board Control Switch 1 amp 2 W BK ICE OPEN 5VDC DRAIN Closed 0VDC High Pressure Sw
40. or If one is not available replace the whole extruding head and housing 12 Install the O ring and mount the lower housing on the gear motor 13 Install the lower part of the mechanical seal on the lower housing 14 Lower the evaporator down and secure it to the lower housing 15 Install the auger assembly with the upper part of the mechanical seal attached Secure the auger assembly using new seal bolts 16 Replace the spout and strap in their correct positions 17 Move the control switch to the ICE position then move the power switch to the ON position 18 Turn on the power supply to start the automatic icemaking process 19 Check for water leaks 20 If no water leaks are detected replace the panels in their correct positions 42 6 Removal and Replacement of Gear Motor NOTICE Hoshizaki recommends that the gear motor capacitor be replaced at the same time as the gear motor 1 Remove the front and top panels 2 Move the control switch to the DRAIN position and drain the water from the evaporator After the water has drained move the power switch to the OFF position then turn off the power supply 3 Remove the strap connecting the spout to the chute assembly then remove the spout 4 Remove the bolts securing the lower housing to the gear motor Lift the evaporator up slightly 5 Remove the bolts securing the gear motor 6 Disconnect the gear motor wiring then remove the gear motor 7 Remove th
41. penser agitation or dispense method Increasing the shutdown delay setting allows for a higher level of ice in the bin before the icemaker shuts down For a typical dispenser unit application a 100 second shutdown delay is recommended When used with a standard Hoshizaki ice storage bin any shutdown delay setting is acceptable WARNING Increasing the shutdown delay allows a higher level of ice in the dispenser unit ice storage bin before shutdown This could lead to icemaker movement or ice overflow 51 Dip Switch Setting No 1 No 2 No 3 Bin Control Shutdown Delay infrared sensor OFF OFF 100 Seconds 1 6 minutes Factory Default 1100 Seconds 18 3 minutes 32 3 Drain Frequency Control 51 dip switch 4 This unit is factory set for optimum performance with the 1 in 1 drain cycle S1 dip switch 4 in the OFF position This setting allows for removal of sediment from the evaporator without interrupting the icemaking process An optional 1 in 12 drain cycle is 51 Dip Switch Settin Drain Timer Interval Drain Valve Open available OFF 1 in 1 2 Seconds ON 1 12 11 Hours 45 Minutes 4 Continuous Dispensing Timer S1 dip switch 5 amp 6 DCM models only The dispense mode switch on DCMs must be in the CONTINUOUS position for this setting to apply The factory setting allows ice to be dispensed continuously as long as the dispense solenoid is activated S1 Dip Switch Settin 5 Bin Control
42. rminals CB COMP LED turns on Bin Control Sensor 20VDC Closed green LED on Brown BR 20VDC DBU to BR 20VDC DBU to W OVDC W to BR White W Multimeter Red Positive Test Lead 20VDC Bin Control Sensor 20VDC Open yellow LED flashing or steady 20VDC DBU to BR Dark Blue DBU OVDC DBU to W 20VDC W to BR Black Negative Test Lead Connector Bin Control Sensor Fig 5 23 8 and COMP LEDs are Use object to cover BC sensor lens at the bottom of the icemaker If the bottom of the icemaker is not accessible in your application remove the thumbscrew securing BC housing remove BC from the base then cover BC sensor See Fig 6 BC yellow LED turns on flashing or steady BC yellow LED flashes when ice is at the outer limit of its range and turns steady as ice nears After BC yellow LED turns on flashing or steady BC shutdown delay timer starts See Bin Control Shutdown Delay infrared sensor 51 dip switch 1 2 3 Comp should de energize immediately after BC shutdown delay timer terminates 5 min later GM and FM FMR de energize Diagnosis If BC yellow LED is not on after covering the BC sensor replace BC If unit remains on after BC shutdown delay timer terminates and the 5 minute ice purge timer terminates replace CB 9 Remove the object covering BC sensor If you removed BC housing from the base replace it in its correct
43. scharge opening Maintenance Schedule Clean the ice scoop using a neutral cleaner Rinse thoroughly after cleaning Bi Weekly Air Filters Inspect Wash with warm water and neutral cleaner if dirty Monthly External Water Check for proper pressure and change if necessary Icemaker Exterior Wipe down with a clean soft cloth Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up Clean any chlorine staining rust colored spots using a non abrasive cleanser Infrared Sensor Wipe down with a clean cloth and warm water Lens Underside of Icemaker and Top Kits Bin Door and Snout 44 Maintenance Schedule continued Every 6 Months Yearly After 3 Years then Yearly Icemaker and Dispenser Unit Ice Storage Bin Evaporator Condensate Drain Pan and Gear Motor Drain Pan Icemaker and Dispenser Unit Ice Storage Bin Drains Extruding Head Seal Bolts Inlet Water Valve and Drain Valve Clean and sanitize per the cleaning and sanitizing instructions provided in the instruction manual or maintenance label on the icemaker Wipe down with a clean cloth and warm water Slowly pour one cup of sanitizing solution prepare as outlined in the sanitizing instructions in this manual into the evaporator condensate drain pan and then slowly pour one cup into the gear motor drain pan Be careful not to overflow the pans Repeat with a cup of clean water to rinse Check to make sure they are clear
44. sis POWER OK LED Off Check for 115VAC at control transformer brown BR wire to neutral W If 115VAC is not present check the power switch and breaker If 115VAC is present check for 24VAC at control transformer red R wire to neutral LBU If 24VAC is not present check control transformer continuity Replace as needed If 24VAC is present check 24VAC 14A fuse If fuse is good check for 24VAC at CB K8 1 W R to CB K8 2 If 24VAC is present and POWER OK LED is off replace CB 3 5VDC Output Control Switch High Pressure Switch Compressor Delay Relay and Float Switch When checking 5VDC voltage always place the red positive test lead from the multimeter to CB K5 pin closest to CB K4 connector See Fig 1 Then place the black negative test lead from the multimeter to the corresponding pin to complete the 5VDC check If the icemaker is in alarm beeping see III B LED Lights and Alarm Safeties a Control Switch When in the ICE position control switch contacts are open and 5VDC is present at CB K5 pin closest to K4 connector to CB 9 1 W Bk If 5VDC is not present confirm the control switch is in the ICE position then check control switch continuity open If 5VDC is still not present replace CB When the control switch is in the DRAIN position the control switch contacts are closed and OVDC is present at K5 pin closest to CB K4 connector to CB 9 2 W Bk If 5VDC is present confirm the
45. sition and drain the water from the evaporator After the water has drained move the power switch to the OFF position then turn off the power supply 3 Remove the strap connecting the spout to the chute assembly then remove the spout 4 Loosen the cutter Do not remove at this time 5 Remove the extruding head seal bolts and discard NOTICE The seal bolts are not reusable New seal bolts must be used 6 Using the cutter lift out the auger assembly 7 Remove the cutter extruding head and upper part of the mechanical seal from the auger and place on the new auger NOTICE To help prevent water leaks be careful not to damage the surfaces of the O ring or mechanical seal 8 Install the new auger assembly with the upper part of the mechanical seal attached Secure the auger assembly using new seal bolts 9 Replace the spout and strap in their correct positions 10 Move the control switch to the ICE position and the power switch to the ON position 11 Turn on the power supply to start the automatic icemaking process 12 Check for water leaks 13 If no water leaks are detected replace the panels in their correct positions 4 Removal and Replacement of Evaporator 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 refri
46. spuooes 06 5 95 06 06 Sejnuiui wnwIxe 91015 Ld 06 Y liben 19 jou seop 5 5 sueis WO 2 Spunos ft 7 YMS LS uonna 3914838 puesjeseiuueje 14 995 06 Alana spuooes 2 suado 82 sseid ssed q 59502 SAN ueuM 1 Ayayes 1942M 9 o 2 2 9 2 2 eBung 921 2 1114 1 TS y i ul f40j9ej 1 zL ur L p youms dip LS 159 O8 4 11311 Og u 19 99 uo q31 6819 99 99 2 pue s s uue e ueuM senuguoo AM senunuoo W9 IND senunuoo WD spunos 4 1 29506 lt 1115 uedo s4n gt 29 06 Suels 14 AM uo G37 H3MOd 1301 Ul U9IIMS U9IIMS JOMOd dnueis 1 14 lt p B Service Diagnosis A WARNING The appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serio
47. t 8 High Pressure Switch Dirty air filter or condenser z s Condenser fan motor defective wm Refrigerant overcharge Refrigerant lines or components plugged Control board defective 9 Bin Control Dirty or misaligned See II D Bin Control Check 2 b Defective c Control board defective Startup Fill Cycle reservoir empty 1 Control Board a Defective See Control Board Check 2 Inlet Water Valve a Screen or orifice clogged b Defective c Control board defective Startup Fill Cycle reservoir full 1 Float Switch See Float Switch Check and Cleaning 2 Gear Motor 3 Compressor Delay Relay a Float does not move freely b Defective c Control board defective a Fuse blown Internal protector open Gear motor winding open Mechanical failure e Control board defective a Not energized b Defective 4 Fan Motor ee ee 7 1 Compressor Delay Relay gt Compressor SENE b Damaged or defective Refrigerant Lin Kono e f 5 Thermostatic Expansion Valve 6 Drain Valve 8 Water Regulating Valve a Set too high MWH Models b Defective 9 Headmaster Valve a Defective MRH Models _ _ i Float Switch See ILE Float Switch Check 2 niet Water Vale 3 Water Supply Se pete 4 Control Board a Defective See Control Board Check 1 Bin C
48. the condenser using the compressed air or carbon dioxide supply until water stops coming out 6 Close the drain valve s 7 Replace the panels in their correct positions 47 VII Disposal The appliance contains refrigerant and must be disposed of in accordance with applicable national state and local codes and regulations Refrigerant must be recovered by properly certified service personnel 48 VIII Technical Information We reserve the right to make changes in specifications and design without prior notice A Specification and Performance Data Pressure data is recorded at 5 min into freezing cycle The data not in bold should be used for reference only 1 FD 650MAH C air cooled Specification Sheet AC SUPPLY VOLTAGE 115 60 1 COMPRESSOR 115V 7 9 RLA 54 5 LRA GEAR MOTOR 120 V 2 3 FLA 1 4 HP FAN MOTOR 115 V 1 0 FLA 1 15 HP OTHER 115V 0 03A MAXIMUM FUSE SIZE 20A MAX HACR BREAKER USA ONLY 20A MAX CIRC BREAKER CANADA ONLY 20 MINIMUM CIRCUIT AMPACITY APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day a ME ME MEC Reference without marks a0 22 430 423 192 418 189 380_ 172 SHAPE OF ICE Cubelet ICE QUALITY Approx 86 Ice 90 70 F Conductivity 200 ELECTRIC amp WATER CONSUMPTION 90 70 F 70 50 F ELECTRIC W kWH 100 lbs 1036 5 35 971 3 64 POTABLE WATER 57 12 0 78 12 0 gal 24HR gal 100 Ibs Performance Data S
49. the power switch to the OFF position 5 Remove the evaporator drain line hose from the evaporator and attach a compressed air or carbon dioxide supply to the hose 6 Turn on the power supply then move the power switch to the ON position Blow out the evaporator drain line using the compressed air or carbon dioxide supply until water stops coming out 7 Move the power switch to the OFF position then turn off the power supply Reconnect the evaporator drain line hose 8 Move the control switch to the ICE position Replace the front panel in its correct position 9 Remove all ice from the dispenser unit ice storage bin Clean the dispenser unit ice storage bin liner using a neutral cleaner Rinse thoroughly after cleaning 46 3 On water cooled models remove the water from the water cooled condenser 1 Make sure the power supply is off then remove the front top and right side panels 2 Close the condenser water supply line shut off valve If connected to a closed loop system also close the condenser return line shut off valve 3 Open the condenser water supply line drain valve If connected to a closed loop system also open the condenser return line drain valve 4 Attach a compressed air or carbon dioxide supply to the condenser water supply line drain valve 5 Open the water regulating valve by using a screwdriver to pry up on the spring retainer underneath the spring While holding the valve open blow out
50. tically reset 147Vac 5 or more when voltage is corrected Gear Motor Manual reset Turn power off and on again CDR contacts fail to close p Bin Control Mechanical Backup to Infrared Manual reset Turn power off and on again Sensor 51 dip switch 7 Not used this model Legend Comp compressor CDR compressor delay relay DV drain valve FM fan motor FMR fan motor remote GM gear motor UFS float switch WV inlet water valve 31 C Settings and Adjustments NOTICE Dip switches are factory set Failure to maintain factory settings may adversely affect performance and warranty coverage For more information contact your Hoshizaki Certified Service Representative 1 Default Dip Switch Settings The 51 dip switch settings are factory set to the following positions Dip SwitchNo 1 2 3 4 5 6 7 8 9 10 Normally off factory use Bin Control Mechanical Shutdown Delay N A FD 650M_H C Models Bin Control Selector Do not adjust Continuous Dispensing Timer DCM models only do not adjust on modular icemakers Drain Frequency Control Bin Control Shutdown Delay Infrared Sensor 2 Bin Control Shutdown Delay infrared sensor S1 dip switch 1 2 3 BC shutdown delay is the delay between the sensor detecting ice yellow LED flashing or steady and the start of the shutdown sequence For dispenser unit applications the ice level at shutoff may need to be adjusted depending on the dis
51. to BR OVDC DBU to W 20VDC W to BR 20VDC DBU to W OVDC W to BR B LED Lights and Alarm Safeties The POWER Ok LED indicates proper control voltage and will remain on unless a control voltage problem occurs For further details see Service Diagnosis Energized Fill Cycle WTRIN wo o 7 Ice Purge Cycle FM FMR Freeze Cycle with refill GM WTRIN refill GM Comp On until UF S closes COMP FM FMR WV Alarm sounds after refill 90 sec The built in alarm safeties shut down the unit No of Beeps Low Water Safety Automatic reset once water supply is restored UFS open 90 seconds after WV energized UF S closes 2 Control Switch Automatic reset once the control switch is In DRAIN position longer than 15 minutes moved to the ICE position 3 High Pressure Switch Automatic reset once pressure drops below the First and second activation in 1 hour high pressure threshold and the high pressure switch closes High Pressure Switch Call for service To avoid possible catastrophic Third activation in 1 hour failure it is recommended to leave the icemaker off until this alarm is resolved Manual reset Turn power off and on again 5 Freeze Timer Manual reset Turn power off and on again WV gt 30 minutes since last WV activation Low Voltage POWER OK LED turns off if voltage 92Vac 5 or less protection operates 7 High Voltage The control voltage safeties automa
52. trogen 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 the charging hoses to both high and low side refrigerant access valves IMPORTANT The vacuum level and vacuum pump may be the same as those for current refrigerants However the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for POE oils 2 Turn on the vacuum pump then open the gauge manifold valves Never allow the oil in the vacuum pump to flow backwards 3 Allow the vacuum pump to pull down to a 29 9 Hg vacuum Evacuating period depends on pump capacity 4 Close the low side valve and high side valve on the gauge manifold 5 Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder Remember to loosen the connection and purge the air from the hose For air cooled and water cooled models see the nameplate for the required refrigerant charge For remote models see the rating label inside the icemaker Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 latest edition be used 36 6 A liquid charge is required when charging 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 cyl
53. ure to meet these code requirements could result in death electric shock serious injury fire or damage The icemaker requires an independent power supply of proper capacity See the nameplate for electrical specifications Failure to use an independent power supply of proper capacity can result in a tripped breaker blown fuse damage to existing wiring or component failure This could lead to heat generation or fire THE ICEMAKER MUST BE GROUNDED Failure to properly ground the icemaker could result in death or serious injury To reduce the risk of electric shock do not touch the power switch or control switch with damp hands Move the power switch to the OFF position and turn off the power supply before servicing Place the disconnect if applicable in the off position Lockout Tagout to prevent the power supply from being turned back on inadvertently Power switch in OFF position does not de energize all loads Do not place fingers or any other objects into the ice discharge opening Do not make any alterations to the appliance Alterations could result in electric shock injury fire or damage A WARNING continued The appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety Chi
54. us injury or fire Risk of electric shock Use extreme caution and exercise safe electrical practices Power switch in OFF position does not de energize all loads Moving parts e g fan blade can crush and cut Keep hands clear CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after the appliance is serviced Make sure that none have fallen into the storage bin Make sure all food zones in the icemaker and dispensing unit ice storage bin are clean after service 1 Ice Production Check To check production prepare a bucket or pan to catch the ice and a set of scales to weigh the ice After the appliance has operated for 10 to 20 minutes catch the ice production for 10 minutes Weigh the ice to establish the batch weight Multiply the batch weight by 144 for the total production in 24 hours When confirming production or diagnosing low production reference production information found in VIII A Specification and Performance Data 2 Diagnostic Procedure This diagnostic procedure is a sequence check that allows you to diagnose the electrical system and components Before proceeding check for correct installation proper voltage per appliance nameplate and adequate water pressure 10 to 113 PSIG Note When checking high voltage 115VAC always choose a neutral W wire to establish a good neutral connection When checking low voltage 24VAC always choose a neutral LBU
55. wire When checking control board DC voltage 5VDC always place the red positive test lead from the multimeter to CB K5 pin closest to CB K4 connector See Control Board Check To speed up the diagnostic process the 5 min ice purge cycle may be bypassed by pressing the SERVICE button on the control board after the gear motor starts WARNING Risk of electric shock Care should be taken not to touch live terminals 1 Confirm power supply is on and power switch is in the ON position 2 Move the control switch to the DRAIN position Diagnosis POWER OK LED Check that CB POWER LED is on If not check for 115VAC at control transformer brown BR wire to neutral W If 115VAC is not present check the power switch and breaker If 115VAC is present check control transformer continuity Replace as needed Next check for 24VAC at control transformer red R wire to neutral LBU If 24VAC is not present check control transformer continuity Replace as needed If 24VAC is present check 24VAC 1A fuse If fuse is good check for 24VAC at CB K8 1 to CB K8 2 If 24VAC is present and POWER LED is off replace CB 15 Diagnosis DV If DV does not energize check for 24VAC at CB K2 10 W BU to neutral If 24VAC is not present check control switch continuity If open while in the DRAIN position replace control switch If closed check for OVDC at CB 9 1 W BK to K9 2 W BK If
56. y If UFS remains open 90 sec after WV energizes a 1 beep alarm sounds This alarm resets automatically once UFS closes 5 Ice Purge Cycle GM LED is on 30 sec GM delay timer starts WV de energizes and WTRIN LED turns off Once the 30 sec GM delay timer terminates GM FM FMR and CDR energize CDR cannot energize unless GM circuit is complete fuse internal protector and motor windings Once CDR energizes CB 9 5 W O and CB K9 6 W O 5VDC circuit closes and 5 min ice purge timer starts See II C 3 c Compressor Delay Relay 5 min Ice Purge Timer Circuit If CDR de energizes CB 5 W O and CB 6 W O circuit opens an 8 beep alarm occurs See LED Lights and Alarm Safeties Note To bypass ice purge cycle and go straight to freeze cycle press CB SERVICE button during 30 sec GM delay time Diagnosis CB Check that UFS closed WV LED turned off and WV de energized If UFS is closed WV LED is off and GM LED is off replace CB If GM LED is on and GM is off confirm 115VAC at CB K1 2 BR to neutral W If 115VAC is not present check for loose connection from power switch If 115VAC is present check for 115VAC at CB K1 3 R to neutral W If 115VAC is not present replace CB Diagnosis GM If 115VAC is present at K1 3 R to neutral W check GM fuse GM capacitor GM windings and GM coupling between auger and GM Diagnosis CDR Once GM energizes check for 115VAC at CDR 7 O
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