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Hoshizaki TM-500AAE, Руководство по обслуживанию

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13

[c] FLUSH WATER VALVE

The Flush Water Valve is energized to open and flush out the Tank (100V AC) after the icemaker
shuts down and every 12 hours when the Storage Bin is used.

[d] DRAINING ICEMAKER IN SUBFREEZING CONDITIONS

In winter, the 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 water supply.
2) Open the Air Shut-off Valve.
3) Press the Stop Button, and drain the Float Tank and Evaporator.
4) Turn off the icemaker.

Before restarting the icemaker:
1. Close the Air Shut-off Valve.
2. Open the Water Supply Line Shut-off Valve.

Содержание TM-500AAE

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

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 7: ...3 2 DIMENSIONS CONNECTIONS...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

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

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

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

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

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

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

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

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

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

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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