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Hoshizaki TM-500AAE, Service Manual

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Hoshizaki TM-500AAE Service Manual Download Page 23

19 

[c] TIMING CHART (Fixed Mounting) 
 
 

Stop button

Select SW

Operation SW

Ice button

Ice mode

Stop mode

Water level

Upper float SW

Drain mode

Lower float SW

Control WV

Flush WV

LV

FM

CM

GM

PS(HIGH)

Bin control

15s

15s

480s

5s

120s

Floor Mounting

Fixed Mounting

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

Upper

Lower

Bottom

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

5s

PS(LOW)

ON

OFF

480s

120s

30s

Summary of Contents for TM-500AAE

Page 1: ...NO E2TA 684 ISSUED SEP 23 2005 REVISED JUN 26 2007 HOSHIZAKI THIN GLASS ICE MAKER SERVICE MANUAL MODEL TM 500AAE...

Page 2: ...GREASE UP BEARING 6 5 PERIODICAL CLEANING 7 III TECHNICALINFORMATION 8 1 WATER CIRCUIT AND REFRIGERANT CIRCUIT 8 2 WIRING DIAGRAM 9 a WIRING DIAGRAM 9 b CONTROL BOX LAYOUT 10 3 ICEMAKING MECHANISM 11...

Page 3: ...Only 34 i SPOUT SWITCH Proximity Switch 34 j CRANKCASE HEATER 34 7 OPERATION BOARD 35 a USER OPERATION 35 b SERVICE OPERATION 36 8 PROTECTORS 37 a INDICATION 37 b PROTECTORS 37 9 ERROR CODES 39 10 PER...

Page 4: ...iii 8 FLUSH WATER VALVE 59 9 CONTROLLER BOARD 60 10 LINE VALVE 60...

Page 5: ...is condition the icemaker controls the Fan Motor rotation speed to keep the discharge pressure in the refrigeration circuit within a proper range d OVERLOAD PROTECTION Despite the above mentioned ice...

Page 6: ...7 OPERATION BOARD for details h CHANGE OF ICE TYPE The ice type is changeable by replacing the Pulleys provided on the Gear Motor and Gear Head driving the Evaporator Drum The icemaker is factory adju...

Page 7: ...3 2 DIMENSIONS CONNECTIONS...

Page 8: ...ntinuous ice making system COMPRESSOR CONDENSER HEAT REJECTION EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE Hermetic Compressor Model CS20K6E PFZ Fin and Tube type Air cooled Fan Motor output 30W...

Page 9: ...ve Float Switch Expansion Valve Gear Motor Receiver Tank Drier Fan Motor Line Valve Control Box Main Control Box Operation Pressure Switch Icemaking Unit Flush Water Valve Compressor Top View Front Vi...

Page 10: ...st from the air and keeps the Condenser from getting clogged As the Filter gets clogged the icemaker s performance will be reduced Remove and clean the Air Filter at least twice per month 1 Push down...

Page 11: ...aner Rinse thoroughly with a clean cloth and fresh water 3 Mix 5 litres of water with 18 mL of 5 25 sodium hypochlorite solution in a suitable container or the recommended Hoshizaki sanitiser as direc...

Page 12: ...8 III TECHNICAL INFORMATION 1 WATER CIRCUIT AND REFRIGERANT CIRCUIT Pressure Switch Low Side Cut out 0 03 0 02 MPa Cut in 0 1 0 02 MPa High Side Cut out 3 2 0 02 MPa Cut in 2 55 0 02 MPa...

Page 13: ...9 2 WIRING DIAGRAM a WIRING DIAGRAM...

Page 14: ...10 b CONTROL BOX LAYOUT...

Page 15: ...face b CUTTER The stainless steel Cutter is fixed on the Tank so that it can be repositioned against the Evaporator c BEARING The Bearing is installed on one side of the Tank to support the Evaporator...

Page 16: ...ing equipment 4 WATER CIRCUIT a FLOAT SWITCH The Tank holding the Evaporator is provided with a plastic Float Switch to detect the water level The floats move up and down along with the water level an...

Page 17: ...water circuit must be completely drained out or otherwise protected to prevent freeze up and damage before shutting down the icemaker at night 1 Close the Water Supply Line Shut off Valve to stop wat...

Page 18: ...cemaker for 30 minutes to produce ice check for impurities and discard c REFRIGERANT CONTROL Compressor Cooling See 1 WATER AND REFRIGERANT CIRCUIT Fan Cooling The Fan Motor blows air over the Compres...

Page 19: ...or The refrigerant flows through a very narrow path in the Expansion Valve with a sudden drop of pressure and evaporates by absorbing heat of vaporization from the Evaporator The water supplied inside...

Page 20: ...tion to regulate the superheat difference between evaporating temperature and suction gas temperature No superheat control is available from outside To check the Expansion Valve for proper operation r...

Page 21: ...lSwitchtrips fixedmountingonly theicemaker stops icemaking operation starts pumping down to drain water from the Tank and finally shuts down For fixed mounting only the icemaker automatically starts t...

Page 22: ...Upper float SW Drain mode Lower float SW Control WV Flush WV LV FM CM GM PS HIGH Bin control 15s 15s 480s 5s 120s Floor Mounting Fixed Mounting ON OFF ON OFF ON OFF ON OFF ON OFF Upper Lower Bottom O...

Page 23: ...l Upper float SW Drain mode Lower float SW Control WV Flush WV LV FM CM GM PS HIGH Bin control 15s 15s 480s 5s 120s Floor Mounting Fixed Mounting ON OFF ON OFF ON OFF ON OFF ON OFF Upper Lower Bottom...

Page 24: ...20 d SEQUENCE 1 Startup Water Supply Floor Mounting...

Page 25: ...21 1 Startup Water Supply Fixed Mounting...

Page 26: ...22 2 Startup After completion of water supply Fan Motor and Line Valve start in 2 min Floor Mounting...

Page 27: ...23 2 Startup After completion of water supply Fan Motor and Line Valve start in 2 min Fixed Mounting...

Page 28: ...24 3 Startup After Fan Motor and Line Valve start Compressor starts in 15 sec Floor Mounting...

Page 29: ...25 3 Startup After Fan Motor and Line Valve start Compressor starts in 15 sec Fixed Mounting...

Page 30: ...26 4 Startup Ice production starts Floor Mounting...

Page 31: ...27 4 Startup Ice production starts Fixed Mounting...

Page 32: ...28 5 Normal Operation Bin control and drain cycle 480 sec start Fixed Mounting...

Page 33: ...29 6 Shutdown After pump down and drain cycle 480 sec start Compressor stops in 5 sec Floor Mounting...

Page 34: ...30 6 Shutdown After pump down and drain cycle 480 sec start Compressor stops in 5 sec Fixed Mounting...

Page 35: ...31 7 Shutdown Drain Floor Mounting...

Page 36: ...32 7 Shutdown Drain Fixed Mounting...

Page 37: ...l and costly problems such as with the icemaking mechanism 3 Error Code Indication When the icemaker shuts down with a trouble an error code will be displayed immediately to notify the user To facilit...

Page 38: ...ole See I 2 DIMENSIONS CONNECTIONS for hole locations i SPOUT SWITCH Proximity Switch When the Bin Control Switch fails to operate ice clogs and deforms the Switch Plate to trip the Spout Switch and t...

Page 39: ...art icemaking operation Stop When pressed in ICE mode the unit will stop icemaking operation After stopping icemaking operation the unit will immediately drain and shut down Reset When pressed after t...

Page 40: ...t recent errors will be displayed in reverse order of occurrence including those not informed to the user not displayed shows the end of the error record Release the Option Button to return to the ori...

Page 41: ...r Internal Inherent Motor Protector Senses a temperature rise of the Compressor and internally shuts off the circuit Automatically resets when the temperature goes down If the Compressor takes a long...

Page 42: ...reset 5 Overcurrent Protector Trips to shut down the icemaker in case of overcurrent conditions Manual reset 6 Spout Switch If the Bin Control Switch fails to operate the Spout will be clogged with i...

Page 43: ...1 Abnormal Ice Production During Compressor operation Float Switch trips at upper float level for 10 minutes Whole unit stops Press Reset Button Float Switch Control Water Valve not closing Refrigerat...

Page 44: ...trips again for 2 seconds within 5 minutes after Gear Motor restarts count 2 EL appears on count 1 floor mounting or count 4 fixed mounting Whole unit stops Press Reset Button Ice Spout clogged Spout...

Page 45: ...e bar Suction Pressure bar 10 10 21 15 32 21 0 100 200 300 400 500 600 700 1 0 1 1 1 2 1 3 1 4 Ambient Temp Water Temp Ice Production Capacity kg day Thick 10 10 10 10 21 15 32 21 0 0 2 0 4 0 6 0 8 1...

Page 46: ...0 300 400 500 600 700 1 0 1 1 1 2 1 3 1 4 Ambient Temp Water Temp Ice Production Capacity kg day Thin 10 10 10 10 21 15 32 21 10 12 14 16 18 20 22 0 1 2 3 4 Ambient Temp Water Temp Head Pressure bar 1...

Page 47: ...till water is supplied 1 Disconnected 1 Connect g Plug and Receptacle Control Box 2 Terminal out of Plug or Receptacle 2 Insert Terminal back in position h Spout Switch Proximity Switch 1 Tripped 1 Se...

Page 48: ...Broken 1 Replace 1 Gas leaks 1 Check for leaks with a leak detector Reweld leak replace Drier and Mechanical Seal and charge with refrigerant The amount of refrigerant is marked on Nameplate or Label...

Page 49: ...e 1 Replace e Evaporator 1 Low side pressure too low 1 See if Expansion Valve Bulb is mounted properly and replace the valve if necessary f Gear Head 1 Damaged 1 Replace 1 Abnormal noise g Heater 1 Br...

Page 50: ...ndling of Handy Flux R404A Repair of the refrigerant circuit needs brazing It is no problem to use the same handy flux that has been used for the current refrigerants However its entrance into the ref...

Page 51: ...he atmosphere When replacing the Drier take the opportunity to also fit a High side Access Valve for ease of charging liquid refrigerant c EVACUATION AND RECHARGE 1 Attach Charging Hoses Service Manif...

Page 52: ...ints and valve caps 10 Avoid charging large quantities of liquid into the low side in case of damage to the Compressor Cap Access Valve Depressed OPEN 2 BRAZING DANGER 1 Refrigerant R404Aitself is not...

Page 53: ...G When repairing a refrigerant system be carefulnot tolet the burnerflame contact any electrical wires or insulation 6 Remove the Bolts and Rubber Grommets 7 Slide and remove the Compressor Unpack the...

Page 54: ...cement has been made 1 Disconnect the power source 2 Remove the panels 3 Recover the refrigerant and store it in a proper container if required by an applicable law See 1 b REFRIGERANT RECOVERY 4 Remo...

Page 55: ...or outlet 5 Disconnect the Expansion Valve using brazing equipment 6 Braze the new Expansion Valve with nitrogen gas flowing at the pressure of 0 2 0 3 bar WARNING Always protect the valve body by usi...

Page 56: ...removable with this part in place Belt Cover Sensor Cover After loosening the screws remove the Sensor Cover by sliding it toward the back of the unit Otherwise the Sensor attached to the Sensor Cover...

Page 57: ...53 Fig 1 Fig 2 Fig 3...

Page 58: ...tighten the adjusted screws a further 90 degrees and fix them by double nuts Note The following steps will require refrigerant gas recovery Skip them if not needed To facilitate servicing after refrig...

Page 59: ...out when the screws are loosened Prepare waste cloth under to receive the oil 16 Remove the Mechanical Seal Gasket Housing Seal and O ring in this order Note The Bearing side of the Housing Seal is f...

Page 60: ...hanical Seal Gasket C ring O ring Oil Seal Cord Seal V ring Plug and Label Ban REASSEMBLY 23 Fit the V ring with its rip facing the side of the Tank Apply petrolatum vaseline on the rip side of the as...

Page 61: ...when assembling the Mechanical Seals 32 After finishing assembly fill the Bearing with grease Dow Corning G 4500 from the grease nipple Remove the screw at the bottom of the Housing and apply the gre...

Page 62: ...cuate the system and charge it with refrigerant See the Nameplate for the required refrigerant charge See 1 c EVACUATIONAND RECHARGE IMPORTANT The following parts should be handled with care to protec...

Page 63: ...r Valve Note Water may still remain inside the Evaporator Be sure to drain the water into the Drain Pan 6 Disconnect the Terminals from the Flush Water Valve 7 Remove the Flush Water Valve 8 Remove th...

Page 64: ...m the Controller Board 5 Remove the Controller Board from the Control Box 6 Install the new Controller Board and reassemble the Control Box in the reverse order of the removal procedure 7 Replace the...

Page 65: ...prevent the valve from overheating Do not braze with the valve body exceeding 120 C 7 Install the new Drier See 4 DRIER 8 Check for leaks using nitrogen gas 10 bar and soap bubbles 9 Evacuate the syst...

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