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C. Control Buttons

The control board features RESET, SERVICE 1, and SERVICE 2 Buttons

1. RESET Button

• Press briefly to go to initial harvest cycle.
• Press and hold for 3 seconds to enter control board setting mode. For details about

control board settings, see "III.D. Control Board Settings."

2. SERVICE 1 and SERVICE 2 Buttons

• Press the "SERVICE 1" or "SERVICE 2" button to select the desired setting number.
• Press the "SERVICE 1" button to increase the number and the "SERVICE 2" button to

decrease the number.

• Press the "RESET" button to flash the set value on the display.
• Press the "SERVICE 1" or "SERVICE 2" button to select the desired value.
• Press the "RESET" button to memorize the set value and return to the setting number.
• Leave the buttons untouched for 30 seconds to shift to the normal mode.

Fig. 2

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Содержание IM-50BAA-Q

Страница 1: ...Model IM 50BAA Q Self Contained Cuber Service Manual Number M041 1092 Issued 05 01 2020 hoshizakiamerica com ...

Страница 2: ...age due to improper installation is not covered under warranty Hoshizaki provides this manual primarily to assist qualified service technicians in the maintenance and service of the product Should the reader have any questions or concerns which have not been satisfactorily addressed please call write or send an e mail message to the Hoshizaki Technical Support Department for assistance Phone 1 800...

Страница 3: ...e Cycle 10 4 Shutdown 10 C Service Diagnosis Table 12 D Bin Control Check and Cleaning 14 1 Bin Control Check 14 2 Bin Control Cleaning 15 E Evaporator Thermistor Check 16 III Controls and Adjustments 17 A Control Switch 17 B Control Board 17 1 Control Board Layout 18 C Control Buttons 19 1 RESET Button 19 2 SERVICE 1 and SERVICE 2 Buttons 19 D Control Board Settings 20 E Control Board Information...

Страница 4: ...echanism 39 a Actuator Motor Assembly 39 b Cam Shaft Assembly 39 c Water Plate Switch 40 d Cam Switch 40 e Water Tank Assembly 40 f Lower Evaporator 40 g Evaporator Base 40 h Pump Motor 40 i Water Tank 40 j Ice Guide 43 V Maintenance 45 VI Preparing the Appliance for Periods of Non Use 46 VII Disposal 48 VIII Technical Information 49 A Specification Data 49 B Performance Data 50 C Wiring Diagram 5...

Страница 5: ...ires 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 APPLIANCE MUST BE GROUNDED The appliance is equipped with a NEMA 5 15 three prong grounding plug to r...

Страница 6: ...uals or damage to the appliance NOTICE Protect the floor when moving the appliance to prevent damage to the floor Follow the water supply drain connection and maintenance instructions 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 freezing Normal operati...

Страница 7: ...Water Refrigeration Circuit Diagram A Construction Power Supply Cord Rear Panel Rear View Outside Screw Screw Screw Top Insulation Top Panel Bracket Top Panel Front Panel Lower Bracket Top Panel Top Cover Front View Outside ...

Страница 8: ...porator Thermistor Water Plate Switch Evaporator Pump Motor Drain Pan Inlet Water Valve Bin Control Control Box Cam Switch Scoop Holder Ice Guide Water Plate Water Tank Actuator Motor Condenser Drier Fan Motor Hot Gas valve Compressor ...

Страница 9: ...8 B Water Refrigeration Circuit Diagram Inlet Water Valve Water Pump Drier Condenser Heat Exchanger Strainer Hot Gas Valve Compressor Water Tank Accumulator Evaporator Fan Motor ...

Страница 10: ...rgizes and AMD starts opening water tank fully 2 No ice formed on evaporator or ice formed on evaporator and high AT Either water plate switch or cam switch turns off AMD does not stop opening water tank and Comp stays energized 3 Water tank opening by WT WT 55 4 F 13 C Water tank starts opening again after 1 min WT 55 4 F 13 C Water tank starts opening again after 5 min WT is lower than 55 4 F 13...

Страница 11: ...xt page 4 Shutdown When BC is engaged open for more than 10 seconds the icemaker shuts down after harvest cycle When BC is disengaged closed for more than 80 seconds icemaker restarts at startup cycle If BC is engaged open while the water tank is opening after the power supply is turned on or after the RESET button is pressed shutdown does not start Shutdown occurs 10 seconds after actuator motor ...

Страница 12: ...ition sensor indicates water tank is fully closed pump motor energizes and inlet water valve and hot gas valve energizes for 15 seconds State 7 After 15 seconds inlet water valve and hot gas valve de energizes to start freeze cycle State 8 When evaporator thermistor reaches target integrated value State 1 starts see details Harvest Cycle Bin Control 1 Bin control while water tank is closing State ...

Страница 13: ... open 8 Compressor a Compressor relay magnetic contactor contacts bad or coil winding open b Start capacitor or run capacitor defective single phase c Internal protector open d Start relay contacts bad or coil winding open single phase e Defective 9 Hot Gas Valve a Defective 10 Evaporator Cube Control Thermistor See II E Evaporator Thermistor Check a Loose disconnected or defective 11 Pump Motor a...

Страница 14: ...Supply a Improper water pressure b External water filters restricted c Water leaks from water tank or water plate due to broken tank or plate or icemaker out of level 2 Inlet Water Valve a Water leaks from valve body or water supply pipe joint 3 Water Plate a Spray holes restricted 4 Pump Motor a Defective Large Hole Cubes Possible Cause 1 Refrigerant Charge a Low 2 Condenser a Dirty condenser or ...

Страница 15: ...Press and hold the actuator paddle check for continuity across the wires of BC wire harness connector When the actuator paddle is engaged BC switch is open If closed check that the actuator paddle is not restricted Clean if necessary See II D 2 Bin Control Cleaning If BC switch still reads closed replace BC 8 Reconnect BC wire harness connector to CB CN3 connector then move the control switch to t...

Страница 16: ... from the bin control bracket and move to the front of the icemaker for cleaning 5 Remove the actuator paddle from the switch mount See Fig 1 6 Wipe down BC with a mixture of 1 part of Hoshizaki Scale Away and 25 parts of warm water Rinse the parts thoroughly with clean water 7 Reassemble BC and replace it in its correct position Note If the magnet was removed for cleaning be sure to replace it in...

Страница 17: ...r 2 or 3 min 6 Disconnect the thermistor connector from CB CN13 connector and check the resistance between thermistor leads Normal range is 4 7 to 6 2 kΩ If outside the normal range replace the thermistor If within the normal range continue to the next step 7 Replace the thermistor in its correct position 8 Reconnect the thermistor connector to CB CN13 connector 9 Replace the control box cover in ...

Страница 18: ...actory adjusted 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 n...

Страница 19: ...put VH Connector 2P 7 Segment Double Digit Display CN12 Connector Hall IC XA Connector 4P CN13 Connector Evaporator Cube Control Thermistor XA Connector 2P CN11 Connector 5 VDC Input XMP Connector 6P CN15 Connector Inlet water valve Compressor Drive Relay XA Connector 7P Fuse 3A AC Circuit DC Circuit CN4 Connector 100VAC Input VYH Connector 3P CN14 Connector XA Connector 3P Unused CN2 Connector Pu...

Страница 20: ...VICE 1 and SERVICE 2 Buttons Press the SERVICE 1 or SERVICE 2 button to select the desired setting number Press the SERVICE 1 button to increase the number and the SERVICE 2 button to decrease the number Press the RESET button to flash the set value on the display Press the SERVICE 1 or SERVICE 2 button to select the desired value Press the RESET button to memorize the set value and return to the ...

Страница 21: ...he RESET button for 3 seconds Display changes to 1 2 Use the SERVICE 1 and SERVICE 2 buttons to choose a control board setting 3 Press the RESET button to view the setting s value Current value flashes in display 4 Use the SERVICE 1 and SERVICE 2 buttons to change value 5 Press the RESET button to select value Display returns to control board setting number 6 Once display returns to on 30 seconds ...

Страница 22: ...for Freeze Cycle Termination Upper temperature limit to trip control to ensure minimum dimple size in low temp conditions like at 1 C wt 5 C 10 to 50 C 1 C increments 25 5 Ambient Temperature Correction Rate for Freeze Cycle Termination Percentage of integrated value in low temp conditions against target integrated value to ensure minimum dimple size in low temp conditions like at 1 C wt 5 C based...

Страница 23: ... actual water supply temperature 0 to 20K 1K increments 4 14 Partial Full Drain Flush Selection Selection between full and partial drain flush of icemaking water plate in case of cloudy ice production even after hard water control Icemaking water supply time and water plate overflow pipe direction need to be changed Partial 1 Full 0 0 15 Freeze Cycle Water Supply Time Time to supply additional ice...

Страница 24: ...s 100 34 High Speed Rotation Temperature Condition to increase target fan motor rotation speed When ambient temperature reaches up to high speed rotation temperature CB Setting 34 target rotation speed is increased by high speed rotation rate CB Setting 35 50 to 60 C 1 C increments 60 35 High Speed Rotation Rate Percentage against target rotation speed CB Setting 31 100 to 120 00 to 20 displayed 1...

Страница 25: ...ed value After icemaking water supply starts ice begins to form and freeze cycle integrated value reaches a certain level Then additional water is supplied to dilute concentrated icemaking water in water tank 10 to 100 00 100 1 increments 10 61 Hard Water Control Water Supply Time Time to supply water for hard water control 0 to 90 sec 0 ignore 1 sec increments 0 Water Plate Ice Control 70 Operati...

Страница 26: ...1 Freeze cycle time count up min 21 min or 21 100 last 2 digits only n2 Freeze cycle completion rate n3 Current evaporator cube control thermistor temp 2 F 19 C 75 F 24 C n4 Current control board thermistor temp n5 Water temp presumed Water temp 55 F 13 C or more Water temp less than 55 F 13 C n6 Current fan motor rotation speed If actual rotation speed is 1560 r min The first two digits after act...

Страница 27: ... Remove the old control board and install the new control board 5 Connect the connectors to the new control board 6 Replace the control box cover in its correct position 7 Plug in the appliance and then move the control switch to the ICE position 8 Replace the front panel in its correct position G Error Codes 1 Error Codes When the control board detects an error the display shows one of the follow...

Страница 28: ... Unit resumes operation after 60 minutes and repeats the above error Shut down EE E4 Water tank assebmly closing error Water tank assembly has not fully closed within 50 seconds opened and started to close again but failed to close fully within 50 seconds Halt Press RESET button Unit resumes operation after 60 minutes and repeats the above error Shut down EE E5 High temperature error Evaporator te...

Страница 29: ...thermistor Disconnected Reconnect E2 Hot gas valve Opening failure Replace Control board Blown fuse Replace fuse EE E3 Actuator motor Defective Replace Control board Relay contact failure Replace Blown fuse Replace fuse EE E4 Actuator motor Defective Replace Control board Relay contact failure Replace Blown fuse Replace fuse EE E5 Hot gas valve Closing failure Replace Control board Relay contact f...

Страница 30: ...tector andthenraisethepressure using nitrogen gas 140 PSIG Do not use R 134a 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 134a applications can...

Страница 31: ...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 2 Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG Do not use R 134a as a mixture with pressurized ai...

Страница 32: ... valve on the gauge manifold then close the refrigerant access valve if applicable Disconnect the gauge manifold hose 9 Cap the access valve to prevent a possible leak B Component Service Information 1 Cabinet Rear Panel Top Insulation Top Panel Top Panel Bracket Front Panel Lower Bracket Top Cover Drain Pan Tab Slope Front Frame Front Frame Top Panel Bracket Door Assy a Top Panel Top Insulation T...

Страница 33: ...the hinge bolts 4 Pull off the door assembly towards you to remove it from the hinges Then remove the hinges from the body 5 Pull off the door stopper and door hook fitted to the door assembly from the slotted hole in the front of the body The door stopper can be removed from the door assembly before it is pulled off 6 Replace the removed parts in the reverse order of the removal procedure B C D E...

Страница 34: ...d start capacitor 5 Remove the ground wire from the compressor ground terminal 6 Remove the compressor fixing snap pins 7 Remove the discharge suction and access pipes from the compressor using brazing equipment 8 Pull out the compressor from the rear side 9 Replace the compressor and braze the access suction and discharge pipes 10 Replace the removed parts in the reverse order of the removal proc...

Страница 35: ...orrect position be sure to insert the bottom of the shroud into the base hook c Hot Gas Valve 1 Remove the front panel lower and rear panel move the control switch to the OFF position and then unplug the appliance 2 Remove the control box and air guide from the machine compartment 3 Remove the hot gas valve coil from the hot gas valve body 4 Remove the access valve from the condenser shroud and re...

Страница 36: ...he flange nuts fixed to the evaporator bracket to release the evaporator from the bottom side 9 Remove the collars evaporator bolts and flange nuts from the upper evaporator 10 Replace the upper evaporator and braze the copper tubes 11 Replace the removed parts in the reverse order of the removal procedure 12 Open the water supply line shut off valve B C D E F G 1 2 3 4 5 6 50 0 50 DRAWING No 30 T...

Страница 37: ...50 0 50 DRAWING No 30 TITLE 20 メイショウ図番 DRAWN DESIGNED CHECKED APPROVED DATE SCALE UNIT mm ホシザキ株 HOSHIZAKI CORPORATION 井上メカニズムAY 野津石富 1H6248A 2019 09 13 石富 1 3 No PARTS CODE NAME SPEC Q TY Z 0 1H6248A01 メカニズムAY 0 寸法区分普通寸法公差単位mm 角度差指示なき取付穴のピッチとその累積公差は O 4以下 0 05 0 1 0 2 0 3 0 5 1 3 6 4をこえ 16 0 1 0 2 0 3 0 5 0 7 1 2 3 16 63 0 2 0 3 0 5 0 7 1 2 20 1 2 63 250 0 3 0 5 0 7 1 2 2 0 10 20 1 250 10...

Страница 38: ...ise the upper evaporator 7 When the upper evaporator is vertically positioned screw in the flange nut under the evaporator bracket Use the flange nut to fix the evaporator bolt to the evaporator bracket 8 With the upper evaporator fixed to the evaporator bracket move the evaporator bracket to fit the upper and lower evaporators from front to back and left to right When the exterior surfaces of the...

Страница 39: ...spring washer and washer to release the fan from the fan motor 7 Remove the bolts to release the fan motor from the shroud The fan motor fixing nuts are fit in the shroud 8 Replace the fan motor and fan 9 Replace the removed parts in the reverse order of the removal procedure Note When replacing the condenser in its correct position be sure to insert the bottom of the shroud into the base hook C D...

Страница 40: ...pring from the cam shaft assembly 2 Remove the bolts and nuts fixing the bearing in the cam shaft assembly to the mechanism base 3 Pull out the cam shaft assembly from the bottom Shroud Screw Hole for Condenser Nut Spring Washer Washer Fan Nut Fan Motor Insertion to Base Hook Be sure to insert to replace the condenser in its correct position Bolt 3D prt B C D E F G A 6 5 3 4 2 1 A B C D E F G H 1 ...

Страница 41: ...he bottom 3 Remove the bearing plate and spring from the water tank assembly f Lower Evaporator 1 Remove the flange nuts spring washers washers evaporator screws and plastic washers under the water plate to release the lower evaporator from the water plate g Evaporator Base 1 Remove the screws fixing the evaporator base on the water plate h Pump Motor 1 Remove the screws fixing the pump motor to t...

Страница 42: ...er Tank Assy Actuator Motor Assy Screw Cam Switch Bracket Spacer Spring Spring Switch Bracket Cam A Discharge Hose Suction Hose Pump Motor Screw Lower Evaporator Water Tank Evaporator Base Evaporator Screw Plastic Washer Flange Nut Cam Shaft Assy ...

Страница 43: ... water plate switch opens 5 When the water plate switch does not open within a specific time the control board operates the actuator motor and the cam forcibly separates the lower evaporator from ice which opens the water tank assembly and water plate switch 6 When the water plate switch opens the actuator motor operates to open the water tank assembly and stop it at a specific angle 7 Hot gas flo...

Страница 44: ...Cam Contact when cam opens 85 Lever Water Plate Switch Bolt Cam Switch j Ice Guide 1 Remove the bolts fixing the ice guide assembly to the actuator motor and the rear of the bin 2 Remove the screws fixing the ice guide shaft 3 Remove the plate from the ice guide 4 Replace the ice guide 5 Replace the removed parts in the reverse order of the removal procedure Switch Bracket Frame Plate Ice Guide Ic...

Страница 45: ...ly opens the plastic hex head bolt fixing the spring presses the plate fitted to the ice guide which in turn covers the top of the lower evaporator Spherical ice balls separated from the upper evaporator roll on the ice guide and are led to the bin 3 When the water tank assembly closes the ice guide is pushed up and returns to its vertical position Plastic Hex Head Bolt Plate Frame Ice Guide ...

Страница 46: ...a Task Daily Scoop 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 Filters 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 chl...

Страница 47: ...ns below When the appliance is not used for two or three days under normal conditions it is sufficient to move the control switch to the OFF position 1 Remove the water from the icemaker water supply line 1 Remove the front panel 2 Move the control switch to the OFF position 3 Close the icemaker water supply line shut off valve and open the icemaker water supply line drain valve See Fig 3 4 Allow ...

Страница 48: ...appliance to be pulled out for service Separate piping to approved drain Leave a 2 inch 5 cm vertical air gap between the end of each pipe and the drain Drain Valve Shut off Valve Minimum 1 4 Nominal ID Copper Water Tubing or Equivalent To approved floor drain 1 4 fall per foot Minimum 3 4 Nominal ID Hard Pipe or Equivalent Vent Tube 2 inch 5 cm air gap Drain Floor ...

Страница 49: ...ance with applicable national state and local codes and regulations Refrigerant must be recovered by properly certified service personnel IMPORTANT The insulation foaming agent used for the unit body contains flammable gas cyclopentane With this in mind dispose of the product properly ...

Страница 50: ...RIOR DIMENSIONS W x D x H 24 8 x 20 7 x 33 5 630 525 850mm EXTERIOR FINISH Stainless Steel Galvanized Steel Rear WEIGHT Net 139 Ibs 63kg Shipping 150 Ibs 68kg CONNECTIONS ELECTRIC Cord Connection WATER SUPPLY Inlet R 1 2 connected at rear side DRAIN Outlet Rc3 4 connected at rear side CUBE CONTROL SYSTEM Thermistor and Timer HARVESTING CONTROL SYSTEM Hot gas Thermistor and Timer ICE MAKING WATER C...

Страница 51: ... HR 80 254 0 96 72 0 27 67 0 25 90 242 0 92 69 0 26 65 0 25 gal day m3 day 100 227 0 86 64 0 24 61 0 23 FREEZING CYCLE TIME 70 30 7 34 2 36 9 80 33 7 36 7 40 0 90 36 1 39 0 42 2 min 100 39 5 43 3 46 1 HARVEST CYCLE TIME 70 9 7 10 2 10 4 80 9 3 9 6 9 6 90 9 0 9 2 9 2 min 100 8 6 8 7 8 7 HEAD PRESSURE 70 110 0 75 119 0 82 126 0 87 80 131 0 90 141 0 97 149 1 03 90 152 1 05 165 1 14 171 1 18 PSIG MPa ...

Страница 52: ...51 C Wiring Diagram ...

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