SERVICE MANUAL Model AM-50BAE AM-50BAE-AD
Contents
1. ad 36 VII Removal and Replacement of Components 39 1 Service for Refrigerant LINES soos et 39 a Service Information 39 b Refrigerant f BcoMBEYe ds dene Rh 40 c Evacuation and Recharge enne 41 2 SD 42 Si DSN PTUS 43 A EV ADO ALOU ee ME 44 45 BUMP disons eds 46 FE ales ee ezek PEE 46 Baer Males ies OU Du 47 9 COMmOller re iaa 47 10 Thermistor for Cube Control 48 11 Bin Control 49 4 U1VA6060209 U1VA6060209 I Specifications 1 Dimensions Connections a AM 50BAE Units mm AIRM CD AIR OUT 750 EP AIR QUT 60 gt r WATER INLET 3 4 184 4 80 DRAIN HOSE 92 1mm 0 38 CONTROL SWITCH2. 5 5 sik 5 B AM OBAE AD aate fa Pep pc repe Di eon abo UHR PR 6 2 Sp cifications TETTE 7 AMEBOBAE 7 D AM 50BAE A D 8 I General Into rel OP rM pL abu asma 9 LLL TP E 9 2 lcemaking Compartment ie Dm IRSE DU Pin 10 III Installation and Operating Instructions teta ec 11 1 Checks Before Installation 11 Pe NOC AMON PM TT T ETE 11 SOLU mec HOM 12 Bun Installation ou EE 12 Reversing the Door Hiriges eene Eoo oot ELLE URL LR Reve Fev Le U PU 14 4 Electrical Connections oiu uet DA MPH DEOR ORC REB CR CRUNCH 16 5 Water Supply and Drain 17 Oy Final Check bise ceca pH E QM DU toe HERBA E E NEA E HEN DP GR 18 E PUES 18 8 Preparing the Icemaker for Long 19 IV Cleaning sngMalntenatlga
3. Reliability is a beautiful thing HOSHIZAKI SELF CONTAINED OPEN CELL TYPE Model AM 50BAE AM 50BAE AD SERVICE MANUAL NUMBER 73126 ISSUED December 22 2004 IMPORTANT Only qualified service technicians should attempt to service or maintain this icemaker No such service or maintenance should be undertaken until the technician has thoroughly read this Service Manual HOSHIZAKI provides this manual primarily to assist qualified service technicians in the service and maintenance of the icemaker Should the reader have any questions or concerns which have not been satisfactorily addressed please call or write to the HOSHIZAKI Technical Support Department for assistance HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Attn HOSHIZAKI Technical Support Department Phone 1 800 233 1940 Technical Service 770 487 2331 Fax 770 487 3360 NOTE To expedite assistance all correspondence communication MUST include the following information Model Number Serial Number Complete and detailed explanation of the problem U1VA6060209 U1VA6060209 Please review this manual It should be read carefully before the icemaker is serviced or maintenance operations performed Only qualified service technicians should service and maintain the icemaker This manual should be made available to the technician prior to service or maintenance CONTENTS l Specifications
4. OR POWER ab NEUTRAL GROUNDED B amp BLACK BR BROWN BU BLUE GR GREEN LBU iLIGHT BLUE O ORANG oes TE HOTGAS R RED SOLENOID V VIDLET VALVE W WHITE 29 3 Controls a lcemaking Control The freeze and defrost cycles are controlled by the combination of a thermistor and an electronic controller When the evaporator cools down to a specific temperature around 28 F 2 C the thermistor attached to the evaporator senses the temperature and signals to the electronic controller After the built in timer counts 10 minutes from the signal input the controller switches the contact of the built in relays X1 and X2 to stop the pump motor and fan motor and to open the hot gas valve and water valve This completes the freeze cycle and starts the defrost cycle b Defrost Control The ice cubes formed inside the icemaking cells are released by hot gas warming the evaporator When small portion of the ice melts on the icemaking cell interior the ice drops by its own weight and slides down the ice guide into the storage bin When the evaporator is warmed further to around 45 F 7 C the thermistor senses the temperature rise and signals to the electronic controller After the built in timer counts 50 seconds from the signal input the controller switches the contact of the built in relays to start the pump motor and fan motor and to close the hot gas valve and water valve This completes the defrost cycle
5. 20 1 Cleaning and Sanitizing Instructions ssec uci by neget 20 a Cleaning pam oda iei Aoi 20 b Cleaning 21 Sanitizing 22 d Sanitizing e 22 2 Malrtenaliee uon trap bv rte oO dr OO S ignis uA 27 WAI mE TEE 27 LAXE egejeinigieldg iipeec 28 1 Water Circuit and Refrigerant CIECUID t Nd ub E M ite e 28 2 NV ING mme 29 PL IET LTD 30 a Icemaking Control nnn 30 b Defrost OTIO 30 c Np Adjustment Required Rid RETE CH RU FRED rx SOR RON EHE oett 30 d Before Checking the Electronic 6 4 4 31 e Adjustment at Part Replacement 32 A 33 34 cta 34 b AM 50BA EAD 35 VI Service Diagnosis eae
6. Fan Motor 1 Unplug the icemaker or disconnect the power source 2 Remove the louver and front panel 3 Disconnect the connector of the fan motor 4 Remove the fan motor bracket and the fan motor 5 Cut the leads of the fan motor allowing enough lead length to reconnect using closed end connectors 6 Install the new fan motor in the reverse order of the removal procedure 7 Refit the panels in their correct positions 9 Plug in the icemaker or connect the power source 4 6 U1VA6060209 U1VA6060209 8 Water Valve 1 Close the water supply shut off valve 2 Unplug the icemaker or disconnect the power source 3 Remove the door and top panel 4 Disconnect the receptacle leads from the water valve 5 Remove the valve outlet tubing 6 Remove the water supply inlet and water valve by releasing the two retaining screws 7 Install the new valve in the reverse order of the removal procedure 8 Open the water supply shut off valve 9 Plug in the icemaker or connect the power source 10 Check for leaks 11 Refit the panels in their correct positions Note When replacing parts disassemble as shown in Fig 7 page 25 and replace the defective parts 9 Controller Board 1 Unplug the icemaker or disconnect the power source 2 Remove the louver and door 3 Remove screws and the control box cover 4 Pull out the control box from the machine compartment and disconnect the connectors on the controller board 5 Pul
7. WATER TEMP F i 55 25 49 22 46 21 20 x H27mm 0 65 Ibs 0 29 kg 24 pcs 2716 12 5 Bin Control Setting 22 Ibs 10 0 Column 90 70 70 50 238 16 8 227 9 9 22 0 63 9 30 0 53 7 EXTERIOR DIMENSIONS WxDxH EXTERIOR FINISH WEIGHT CONNECTIONS ELECTRIC WATER SUPPLY DRAIN CUBE CONTROL SYSTEM HARVESTING CONTROL SYSTEM ICE MAKING WATER CONTROL COOLING WATER CONTROL BIN CONTROL SYSTEM COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE 14 9 x 22 6 x 31 5 378 x 575 x 800mm Stainless steel Galvanized Steel Rear Net 88 Ibs 40 kg Shipping 99 Ibs 45 kg without pallet Cord Connection Inlet 3 4 BSP Outlet HOSE 1 0 15 5 Thermistor Timer Hot gas Thermistor Thermistor Timer N A Thermostat Hermetic Model QA51K13GAU6 Air cooled Fin and tube type Tin plated copper tube on sheet and cups Capillary Tube R134a 4 20z 1209 High 240 PSIG Low 120 PSIG P C BOARD CIRCUIT PROTECTION COMPRESSOR PROTECTION ICE MAKER PROTECTION ACCESSORIES SUPPLIED REQUIRED OPERATING CONDITIONS AGENCY N A Auto reset Overload Protector N A Ice Scoop 3 8 male flare Water Inlet fitting N A VOLTAGE RANGE 104 127 V 45 100 F WATER SUPPLY TEMP 45 95 F WATER SUPPLY PRESSURE 7 113 PSIC UL OUTDOOR APPROVED cUL NSF We reserve the righ
8. min 100 38 HARVEST min HEAD PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 HEAT REJECTION FROM CONDENSER 18508TU AT 90 F 32 C WT 70 F 21 C Note Pressure data is recorded at 5 minutes into freezing cycle The data not in bold should be used for reference only We reserve the right to make changes in specifications and design without prior notice 34 U1VA6060209 U1VA6060209 b AM 50BAE AD APPROXIMATE ICE WATER TEMP F C PRODUCTION PER 24 HR AMBIEN EME EPC 50 10 55 25 70 21 80 27 90 32 lbs day kg day 100 38 APPROXIMATE ELECTRIC 70 21 CONSUMPTION 80 27 90 32 dads 100 38 APPROXIMATE WATER 70 21 CONSUMPTION PER 24 HR 80 27 90 32 gal day m day 100 38 FREEZING CYCLE TIME 70 21 80 27 90 32 100 38 HARVEST CYCLE TIME 70 21 80 27 90 32 100 38 HEAD PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 kg cm G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 1850 BTU h AT 90 F 32 C WT 70 F 21 C Note Pressure data is recorded at 5 minutes into freezing cycle The data not in bold should be used for reference only We reserve the right to make changes in specifications and design without prior notice 35 VI Service Diagnosis PROBLEM CHECK POSSIBLE CAUSE REMEDY 1 The icemaker will not a Power Cord 1 Loose c
9. recharge 1 See 3 T 1 Clogged 1 Clean when bin is filled with ice 14 Abnormal ice a Nozzle foe See IV 1 Cleaning and Sanitizing Instructions Place correct position water tank b Pump Motor 1 Bearing worn out 1 Replace c Pump Motor Impeller 1 Replace and clean d Compressor 1 Replace cylinder valve broken position other surfaces 15 Some cells on the a Nozzle See IV 1 Cleaning and evaporator form no ice Sanitizing Instructions e mE Place in correct position water tank 38 U1VA6060209 U1VA6060209 Vil Removal and Replacement of Components IMPORTANT Ensure all components fasteners and thumbscrews are securely in place after the equipment is serviced 1 Service for Refrigerant Lines a Service Information 1 Allowable Compressor Opening Time and Prevention of Lubricant Mixture R134a The compressor must not be opened more than 30 minutes in replacement or service Do not mix lubricants of different compressors even if both are charged with the same refrigerant except when they use the same lubricant 2 Treatment for Refrigerant Leak R134a If a refrigerant leak occurs in the low side of an ice maker air be drawn in Even if the low side pressure is higher than the atmospheric pressure in normal operation a continuous refrigerant leak will eventually reduce the low side pressure below the atmospheric pressure and will cause air suction Air
10. 1 400 JL 20 POWER SUPPLY CORD 30 ols 2m LONG OUTSIDE b AM 50BAE AD Units mm 358 515 960 Li 31 504 J7 AIR CIN gt AIR QUT x 4 E on 5 285 800 316 DOOR PANEL 30 CONTROL SWITCH BEHIND DOOR 100 211001 AIR OUT 30 WATER INLET 3 4 BSP DRAIN HOSE 7 2m POWER SUPPLY CORD LONG OUTSIDE U1VA6060209 U1VA6060209 2 Specifications a AM 50BAE AC SUPPLY VOLTAGE 115 60 1 3 4 A 5 Min Freeze 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 15 A MAXIMUM FUSE SIZE 15A APPROXIMATE ICE PRODUCTION PER 24 HR Ibs day kg day Reference without marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC amp WATER CONSUMPTION ELECTRIC W KWH 100 tbs WATER gal 24HR gal 100 Ibs EXTERIOR DIMENSIONS WxDxH WATER TEMP F Temp CF 850 J 70 70 51 23 46 21 43 19 80 40 18 90 46 21 535 16 100 40 18 34 15 29 13 Column 20 x H 27mm 0 595 ibs 0 27 24 pcs 27 ibs 12 5 kg Bin Control Setting 22 Ibs 10 0 kg 90 70 F 70 50 F 244 17 0 222 10 4 24 0 71 0 44 0 85 0 14 9 x 22 6 x 33 57 378 x 575 x 850mm EXTERIOR FINISH Stainless steel Galvanized Steel Re
11. 9 Hg 760 mm Hg vacuum Evacuating period depends on the pump capacity 4 Close the low side and high side valves on the service manifold 5 Disconnect the and attach refrigerant charging cylinder to accurately weigh in the liguid charge Remember to purge any air from the charging hose See the nameplate for the required refrigerant charge 6 Open the high side valve on the gauge manifold and accurately measure in the liquid charge Close the valve on the charging cylinder before closing the high side manifold valve Any remaining liquid in the line can be charged into the low side Note Always charge in the liquid stage as many refrigerants are blends and vapor charging will affect the blend consistency 404 7 Turn on the icemaker Release the high side access connector and allow pressure in the charging line to slowly enter the low side of the system Cap off the high side access valve When pressure reduces on the low side disconnect the low side charging line and cap off the access valve 8 Always cap the access valves to prevent a refrigerant leak 9 Always thoroughly leak test all joints and valve caps 10 Avoid charging large quantities of liquid into the low side in case of damage to the compressor Depressed Cap Access Valve OPEN Fig 9 U1VA6060209 41 2 Compressor 1 Unplug the icemaker or disconnect the power source 2 Remove the rear panel louver and front
12. 8 I of warm water Using a chlorine test strip or other method confirm that you have a concentration of about 200 ppm IMPORTANT For safety and maximum effectiveness use the solution immediately after dilution d Sanitizing Procedure The sanitizing process will sanitize the icemaker 1 Move the control switch to the OFF position 2 Open the bin door and remove ice from the storage bin 3 Remove the slope by bending its center carefully and releasing it from the two slope shafts Remove the slope from the storage bin 4 Thoroughly clean and sanitize the storage bin slope scoop and any parts normally accessible from the storage bin 5 Remove each separator by lifting it to the horizontal position and pushing it hard inward Remove all separators in the same way and clean and sanitize them 22 U1VA6060209 Water Tank 6 Disconnect the suction tube by compressing both plastic tabs to unlock the joint in the direction of the black arrows and pulling the tube clear to drain the tank Suction Tube 7 Spread out the tabs on both sides to unlock the water tank and pull it out toward you Unlock Unlock Soak the water tank in the sanitizing S B solution for 10 minutes Frame Pipe 8 Lift off the ice chute from the front frame pipe and then from the rear frame pipe Soak the ice chute in the sanitizing solution for 10 minutes 9 Pull the discharge tub
13. Controller Variable resistor for adjustment of freeze cycle completion temperature Fig 8 Variable resistor for adjustment of defrost cycle completion temperature Does not need adjustment The variable resistor VR1 is for a fine adjustment of the defrost cycle completion temperature It needs no adjustment at part replacement The variable resistor VR2 is for a fine adjustment of the freeze cycle completion temperature Turn VR2 clockwise for a higher temperature WARM i e ice cubes with larger diameter holes and counterclockwise for a lower temperature COLD i e ice cubes with smaller diameter holes Note Do not adjust VR2 to the lowest temperature It will cause excessive ice production resulting in defrost failure 32 U1VA6060209 chart iming C 4 T 9 BAJBA JOJOW JOJOW 1e1souueu m 427 pJ02 ezee14lsoujeg jsoJjeg 33 U1VA6060209 5 Performance Data a APPROXNATE CE 51 23 46 21 43 47 22 46 21 18 38 32 ibs day kg day 29 APPROXIMATE ELECTRIC 70 21 222 235 CONSUMPTION 80 27 227 242 90 32 228 250 watts 100 38 237 255 APPROXIMATE WATER 70 21 CONSUMPTION PER 24 HR 80 27 90 32 gal day 100 38 FREEZING CYCLE TIME 70 21 80 27 90 32
14. V 1 Cleaning and Sanitizing Instructions 5 Remove the thermistor holder and thermistor from the evaporator 6 Disconnect the solder connections on the evaporator using brazing equipment Protect the surrounding components from heat damage 7 Remove the four screws holding the evaporator 8 Install the new evaporator and secure it with the four original screws 9 Remove and replace the drier See 3 10 Braze pipes with nitrogen gas flowing at a pressure of 3 to 4 psig 21 to 28 bar 11 Check for leaks using nitrogen gas at 140 psig 9 65 bar and soap bubbles 12 Refit the thermistor See 10 Thermistor for Cube Control 13 Evacuate the system and charge it with refrigerant See 1 Evacuation and Recharge 14 Refit the panels in their correct positions 15 Plug in the icemaker or connect the power source 44 U1VA6060209 U1VA6060209 5 Hot Gas Valve IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Unplug the icemaker or disconnect the power source 2 Remove the rear panel louver and front panel 3 Recover the refrigerant and store it in a proper container if required by an applicable law See 1 b Refrigerant Recovery 4 Disconnect the hot gas valve leads 5 Remove the screw and the solenoid coil 6 Remove the valve and drier using brazi
15. and starts the freeze cycle At low temperature conditions where the defrost cycle exceeds minutes the water valve will close after 3 minutes In the initial cycle at startup or after shutdown for bin control water is supplied for 80 seconds This means the water valve closes approx 30 seconds after the freeze cycle starts c No Adjustment Required The thermistor and electronic controller are factory adjusted to produce constant ice all the year around not affected by changes in the ambient and water temperatures No adjustment is required for any frequency 50 60Hz or ambient temperature 30 U1VA6060209 d Before Checking the Electronic Controller Check the power source voltage and the thermistor as shown the table below Thermistor on evaporator CAUTION Thermistor sensor part is fragile glass sealed Handle with care Disconnect the thermistor on the board Remove the screw and the thermistor holder on the evaporator Immerse the sensor part a glass containing ice and water for 5 minutes Check the resistance between terminals of the thermistor Replace the thermistor in its correct position Connect the thermistor 5 5 6 5 Thermistor EVOpOIaDr U1VA6060209 31 Adjustment at Part Replacement The thermistor and electronic controller are designed for optimum ice production If adjustment is desired at part replacement follow the instructions below Electronic
16. ar WEIGHT Net 88 Ibs 40 Shipping 97 ibs 44 CONNECTIONS ELECTRIC Cord Connection WATER SUPPLY inlet 3 4 MPT DRAIN Outlet HOSE ID 15 5mm CUBE CONTROL SYSTEM Thermistor Timer HARVESTING CONTROL SYSTEM Hot gas Thermistor ICE MAKING WATER CONTROL Thermistor Timer COOLING WATER CONTROL N A BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic Model QA51K13GAU6 CONDENSER Air cooled Fin and tube type EVAPORATOR Tin plated copper tube on sheet and cups REFRIGERANT CONTROL Capillary Tube REFRIGERANT CHARGE Ri34a 4 202 120g DESIGN PRESSURE High 240 PSIG Low 120 PSIG BOARD CIRCUIT PROTECTION COMPRESSOR PROTECTION Auto reset Overload Protector ICE MAKER PROTECTION NIA ACCESSORIES SUPPLIED Scoop REQUIRED OPERATING CONDITIONS VOLTAGE RANGE 104 127 V AMBIENT TEMP 45 100 WATER SUPPLY TEMP 45 96 F WATER SUPPLY PRESSURE 7 113 PSIG AGENCY UL OUTDOOR APPROVED cUL NSF We reserve the right to make changes in specifications and design without prior notice b AM 50BAE AD AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE ICE PRODUCTION PER 24 HR Ibs day kg day Reference without marks SHAPE OF ICE ICE PRODUCTION PER CYCLE STORAGE CAPACITY ELECTRIC amp WATER CONSUMPTION ELECTRIC W kWH 100 lbs WATER gal 24HR gal 100 Ibs 115 60 1 3 4 A 5 Min Freeze AT 104 F WT 80 F 15A
17. contains a large amount of moisture and ester oil easily absorbs alot of moisture If an icemaker charged with R134a has possibly drawn in air the drier must be replaced Be sure to use a drier designed for R134a 3 Handling of Handy Flux R134a Repair of the refrigerant circuit requires brazing It is no problem to use the same handy flux that is used for the current refrigerants However its entrance into the refrigerant circuit should be avoided as much as possible 4 Oil for Processing of Copper Tubing R134a When processing the copper tubing for service wipe off oil if any used by using alcohol or the like Do not use too much oil or let it into the tubing as wax contained in the oil will clog the capillary tubing 5 Service Parts for R134a Some parts used for refrigerants other than R134a are similar to those for R134a But never use any parts unless they are specified for R134a because their endurance against the refrigerant have not been evaluated Also for R134a do not use any parts that have been used for other refrigerants Otherwise wax and chlorine remaining on the parts may adversely affect R134a 39 6 Replacement Copper Tubing R134a The copper tubes currently in use are suitable for R134a But do not use them if oily inside The residual oil in copper tubes should be as little as possible Low residual oil type copper tubes are used in the shipped units 7 Evacuation Vacuum Pump and Refrigerant Cha
18. e 1 Continues to open in 1 Check and replace freeze cycle d Water Valve 1 Stuck open 1 Clean or replace 10 Large hole cubes 5 Ambient temperature 1 Low 1 No problem Low ambient temperature results in ice cubes with slightly larger diameter holes b Electronic Controller 1 Built in timer does not 1 Replace count 10 min 37 f Water Supply Line PROBLEM CHECK POSSIBLE CAUSE REMEDY 11 Cloudy cubes a Water Quality 1 High hardness or 1 Install a water filter or contains impurities scale treatment b Nozzle Pee tk See IV 1 Cleaning and Sanitizing Instructions Per dia Place in correct position water tank c Water System 1 Clean or remove scale 2 Check connections for water leaks and repair 12 Freeze cycle time is too Ambient temperature 1 Too high freeze cycle 1 Check for recommended will be extremely long at ambient temperature more than 40 C b Air Inlet Outlet bottom 11 Blocked Bad air 1 Unblock See III 2 front circulation greatly reduces Location ice production capacity of built in condenser types 1 Out of position or loose 1 See 10 Thermistor attachment for Cube Control C Thermistor 2 Leads short circuit 2 V 3 d Before Checking Electronic Controller d Refrigerant Circuit 1 Gas leak 1 Check with a leak detector Weld vacuum and recharge Replace the refrigerant drier 2 Undercharged 2 Check for leaks and
19. e from the spray assembly Remove the assembly by pulling it toward you Discharge Tube Assembly 10 Remove the two caps Soak the caps and the spray assembly in the sanitizing solution for 10 minutes If the nozzles are clogged clean them with a wire ora suitable brush 11 Refit the two caps in their correct positions Make sure the reducing pipe is in place in the center U1VA6060209 2 3 12 Slide in the spray assembly along the rails on the right and left brackets Refit the discharge tube securely on the spray assembly A loose fitting may cause a water leak 13 Position and lock the ice chute onto the front and rear frame pipes by pushing the chute down until it clicks onto both pipes 14 Slide in the water tank along the rails at the bottom of the right and left brackets until it clicks into place 15 Refit the suction tube onto the water tank inlet by pushing the joint to lock it securely in the direction of the arrows A loose fitting may cause a water leak 16 Hook each separator onto the rail and pull it hard toward you until it locks in place with a click Refit all the separators in the same way 17 Refit the slope in its correct position 18 Close the water supply line shut off valve 19 Discard the sanitizing solution 24 Bracket Qu U1VA6060209 20 Mix a new batch of the sanitizing solution and slow
20. ear 5 Cut off heater wires and splice new heater wires 6 Install the new bin control thermostat in the reverse order of the removal procedure 7 Refit the panels in their correct positions 8 Plug in the icemaker or connect the power source U1VA6060209 49 HOSHIZAKI HOSHIZAKI AMERICA INC 618 HIGHWAY 74 SOUTH PEACHTREE CITY GA 30269 U S A PHONE 770 487 2331
21. emaker or disconnect the power source 2 Remove the rear panel louver and front panel 3 Recover the refrigerant and store it in a proper container if required by an applicable law See 1 b Refrigerant Recovery 4 Remove the drier holder if any and pull the drier towards you for easy service 5 Remove the drier using brazing equipment 6 Braze or solder the new drier with the arrow on the drier in the direction of the refrigerant flow Use nitrogen gas flowing at a pressure of 3 to 4 psig 21 to 28 bar when brazing tubings Braze in an access valve using a tee if necessary 7 Check for leaks using nitrogen gas at 140 psig 9 65 bar and soap bubbles 8 Evacuate the system and charge it with refrigerant See 1 Evacuation and Recharge 9 Refit the panels in their correct positions 10 Plug in the icemaker or connect the power source Note Always use a drier of the correct capacity and refrigerant type 43 4 Evaporator IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Unplug the icemaker or disconnect the power source 2 Remove the rear panel door louver top and front panels 3 Recover the refrigerant and store it in a proper container if reguired by an applicable law See 1 b Refrigerant Recovery 4 Remove the water tank assembly referring to I
22. emove hinge A and brace top from g Turn the top panel 180 hookits rear on h Attach hinge B on the left 5 6 j Insert the door into hinge k Screw the hinge stop pin into hinge B U1VA6060209 the body Attach brace top to body gt right Flip A over as shown Hinge A the illustration below and fasten to body as left the body secure its front with screws Hinge B Hinge A Body Left Body Right Remove the handle from the front left and i reattach it to the front right of the door until it is tight 15 Hinge Stop Pin Brace Top 7 Left hinged door 4 Electrical Connections THIS APPLIANCE MUST BE GROUNDED This icemaker reguires a ground that meets national and local electrical code reguirements To prevent possible severe electrical shock injury to individuals or extensive damage to equipment install a proper ground wire to this icemaker Remove the plug from the mains socket before any maintenance repairs or cleaning is undertaken This icemaker must be plugged into a separated power receptacle which has enough capacity The maximum allowable voltage variation should not exceed 10 percent of the nameplate rating See the nameplate Usually an electrical permit and services of a licensed electrician are required 1 6 U1VA6060209 U1VA6060209 5 Water Supply and Drain Connections WARNING To p
23. etween a unit and a wall or a tall unit e Secure Fig 2 Secure the counter to the wall with a bracket or the like Ensure 15 381 mm wide min 34 864 mm high space for the icemaker For the AM 50BAE AD ensure a min 32 814 mm high space for the icemaker IMPORTANT Do not let the weight of the counter rest on the icemaker 12 U1VA6060209 3 To build in between a unit and an open 4 To build into a corner space Cabinet 25 50 Fig 4 Cabinet eet Do not build the corner where the door will hit other equipment such as oven handle or where the icemaker cannot be pulled out for service AM 50BAE AD Fig 3 Use a cabinet or the like to support the counter before building in the icemaker b Building in the Icemaker 1 Make water supply and drain connections 2 Plug in the icemaker 3 Build in the icemaker Slowly push the lower part of the icemaker into place Beware of adjacent equipment IMPORTANT While building in the icemaker do not damage the water supply and drain connections or the power cord U1VA6060209 1 3 Reversing the Door Hinges 1 Right hinged door 2 a Remove the hinge stop pin from hinge B b Remove the door from hinge A 3 c Remove the two screws securing the top panel d Remove hinge A and brace top e Remove hinge B Hinge 1 4 U1VA6060209 4 f R
24. icemaker 1 Clean inside the storage bin and door 2 Open the water supply line shut off valve and plug in the icemaker 3 Move the control switch to the ICE position The freezing cycle will start automatically 18 U1VA6060209 U1VA6060209 8 Preparing the Icemaker for Long Storage WARNING Drain the icemaker to prevent damage to the water supply line at subfreezing temperatures using air or carbon dioxide Shut off the icemaker until proper air temperature is resumed 1 Close the water supply line shut off valve and open the drain valve 2 Move the control switch to the OFF position 3 Blow out the water supply line and the internal water circuit Note This procedure is necessary to protect the icemaker from freezing up at subfreezing temperatures 4 Unplug the icemaker 5 Remove all ice from the storage bin and clean the bin 6 Close the drain valve Icemaker Shut off Valve Drain Valve Air CO2 Fig 6 IV Cleaning and Maintenance IMPORTANT 1 Ensure all components fasteners and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment Wash your hands before removing ice Use the scoop provided to remove ice Keep the scoop clean Clean it by using a neutral cleaner at least once a day and rinse thoroughly Close the bin door after removing ice to prevent entrance of dirt dust or insects into the bin Clean the bin liner at lea
25. l and labels provided with the icemaker 1 Exterior To keep the exterior clean wipe occasionally with a clean and soft cloth Use a damp cloth containing a neutral cleaner to wipe off all oil or dirt build up 2 Condenser Check the condenser once a year and clean if required by using a brush or vacuum cleaner More frequent cleaning may be required depending on the location of the icemaker 3 Water Valve 1 Unplug the icemaker or disconnect the power source 2 Close the water supply shut off valve 3 Remove the door and top panel 4 Disconnect the water supply inlet from the water valve 5 Remove the mesh filter from the water valve 6 Clean the mesh using a brush 7 Refit the mesh and water supply inlet in their correct positions 8 Open the water supply shut off valve 9 Plug in the icemaker or connect the power source Do not remove 10 Check for leaks Filter 11 Refit the panels in their correct positions Fig 7 U1VAG060209 27 V Technical Information 1 Water Circuit and Refrigerant Circuit Capillary Tube Accumulator E Chute Spray Assembly Water Tank Insulation Insulation Controller Drier Condenser Compressor Water Circuit Refrigeration Circuit 2 8 U1VA6060209 U1VA6060209 2 Wiring Diagram BK LIVE CONTROL SWITCH POWER SUPPLY aaa NAMEPLATE VOLTAGE
26. l not be a Water Supply 1 Cut off 1 Turn off power supply and supplied wait for recovery 2 Shut off Valve or water 2 Open closed b Water Valve 1 Filter cogged 3 Water Valve 2 Coil winding opened 2 Replace 71 Water continues to be 1 Check for water leaks supplied in freeze cycle cose with icemaker off lb Electronic Controller 1 Defective 1 Replace 8 No water comes from gt Wiig to Pump Motor 7 Loose connectors or 1 Repair or replace water tank broken wire b Pump Motor 1 Coil winding opened 1 Replace c Pump Motor Impeller 1 Defective or bound 1 Replace and clean 1 Replace S WEE System 1 Check connections for water leaks and repair Fer 1 See IV 1 Cleaning and Sanitizing Instructions 1 Water pressure toolow 1 Check for recommended and water level in water tank pressure too low 9 All components run but a Water System 1 Check connections for no ice is produced water leaks and repair See 1 Cleaning and Sanitizing Instructions b Nozzle 1 1 Cleaning and Sanitizing Instructions Place correct position water tank a Refrigerant Circuit 1 Gas leak 1 Check with a leak detector Weld vacuum and recharge Replace the refrigerant drier 2 Undercharged 2 Check for leaks and recharge 3 Air or moisture trapped 3 Replace drier amp recharge 1 Defective valve 1 Replace compressor Het Gas Valv
27. l out and 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 Refit the panels in their correct positions 8 Plug in the icemaker or connect the power source 47 10 Thermistor for Cube Control 1 Unplug the icemaker or disconnect the power source 2 Remove the top and front panels door louver pipe cover rear and control box cover 3 Remove the connectors on the controller board referring to 9 Controller Board 4 Unscrew and remove the thermistor holder and thermistor located on the evaporator 5 Install the new thermistor in the reverse order of the removal procedure by using a sealant high thermal conductive type See Fig 10 Note Recommended sealant is KE4560RTV manufactured by Shinetsu Silicon When other type of sealant used the cube size and performance will be changed Do not use silicone sealant as this will insulate the thermistor Sealant Holder Thermistor and Leads are FRAGILE Holder HANDLE WITH CARE Evaporator Leads Thermistor Fig 10 48 U1VA6060209 11 Bin Control Thermostat 1 Unplug the icemaker or disconnect the power source 2 Remove the top panel door and pipe cover rear 3 Remove the thermostat holder from the storage bin and disconnect the the bin control thermostat bulb 4 Remove the bin control thermostat from the icemaker body r
28. ld be within 45 F 7 C to 95 F 35 C Operation of the icemaker for extended periods outside of these normal temperature ranges may affect production capacity For best operating results The icemaker should not be located next to ovens grills or other high heat producing equipment The location should provide a firm foundation for the equipment Level the icemaker from side to side and front to rear Avoid a site where dripping is not allowed This icemaker will not work at subfreezing temperatures To prevent damage to the water supply line drain the icemaker when air temperature is below freezing This icemaker requires no clearance on either side But allow enough space at rear for water supply and drain connections and at least 15 approx 38 cm clearance at front 3 Setup 1 Unpack the icemaker and remove all shipping cartons tapes and packing BEFORE operating the unit Be careful not to damage the exterior panels when handling the icemaker 2 Position the a selected site Clean the interior with soap and water and rinse thoroughly 3 Level the icemaker in both the left to right and the front to rear directions 4 The perimeter where the machine touches the floor should be sealed with silicone for sanitation Built In Installation a Checking the Installation Site Ensure a 15 381 mm wide space for building in the icemaker 1 To build in between two units 2 To build in b
29. ly pour it into the water tank 21 Move the control switch to the WASH position 22 After circulating the sanitizing solution for about 15 minutes move the control switch to the OFF position 23 Disconnect the suction tube by compressing both plastic tabs to unlock the joint in the Suction Tube direction of the black arrows and pulling the tube clear 24 Spread out the tabs on both sides of the water tank to unlock it then pull it out toward you Drain the tank 25 After draining slide in the water tank along the rails at the bottom of the right and left brackets until it clicks into place 26 Refit the suction tube onto the water tank inlet by pushing the joint to lock it securely in the direction of the arrows A loose fitting may cause a water leak 27 Repeat 20 through 26 one time 28 Open the water supply line shut off valve U1VA6060209 25 Water Tank Unlock Unlock 29 Move the control switch to the WASH position to circulate clean water for about 5 minutes 30 Move the control switch to the OFF position then remove the water tank drain it and replace it as described in 23 through 26 31 Repeat 29 and 30 two more times to rinse thoroughly 32 Move the control switch to the ICE position and start the automatic icemaking process 2 6 U1VA6060209 2 Maintenance IMPORTANT This icemaker must be maintained individually referring to the instruction manua
30. ng equipment 7 Braze the new hot gas valve with nitrogen gas flowing at a pressure of 3 to 4 psig 21 to 28 bar WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating Do not braze with the valve body exceeding 250 F 120 C 8 Install the new drier See 3 Drier 9 Check for leaks using nitrogen gas at 140 psig 9 65 bar and soap bubbles 10 Evacuate the system and charge it with refrigerant See 1 c Evacuation and Recharge 11 Attach the solenoid coil to the valve body and secure it with the screw 12 Connect the leads 13 Refit the panels in their correct positions 14 Plug in the icemaker or connect the power source 45 6 Pump Motor 1 Unplug the icemaker or disconnect the power source 2 Remove the top panel door and pipe cover rear 3 Disconnect the pump motor leads inside the pipe cover rear 4 Drain the water tank by compressing the plastic tabs on the suction tube to release the joint 5 Spread the tabs on both sides of the water tank and pull it toward you 6 Carefully remove the plastic housing by releasing the retaining screws 7 Disconnectthe pump suction and discharge tubings 8 Release the pump retaining screws to remove the pump 9 Install the new motor in the reverse order of the removal procedure 10 Plug in the icemaker or connect the power source and check for leaks 11 Refit the panels in their correct positions 7
31. ng to Water Supply Inlet Fitting size is a 1 2 FPT Shut off Valve 1 4 fall ao Drain Valve Bin Drain Outlet Hose 5 8 ID To approved floor drain 6 Final Check List 1 Is the icemaker level 2 Is the icemaker in a site where the ambient temperature is within 45 F 7 to 100 F 38 C and the water temperature within 45 F 7 C to 95 F 35 C all year around 3 Have all shipping tape s string and packing been removed from the icemaker 4 Are components fasteners and thumbscrews securely in place 5 Have all electrical and piping connections been made 6 Has the power supply voltage been tested or checked against the nameplate rating Has a proper ground been installed to the icemaker 7 Are the water supply line shut off valve and drain valve installed Has the water supply pressure been checked to ensure a minimum of 10 PSIG 0 7 bar and a maximum of 113 PSIG 7 5 bar 8 Have the compressor hold down bolts and all refrigerant lines been checked against vibration and possible failure 9 Has the bin control thermostat been checked for correct operation 10 Has the user been given the Instruction Manual and instructed on how to operate the icemaker and the importance of the recommended periodic maintenance 11 Has the user been given the name and telephone number of an authorized service agent 7 Startup Check that shipping tape s string and packing are removed before starting the
32. onnections 1 Tighten start 2 Open circuit damaged 2 Repair or replace b Power Switch 1 OFF position 1 Move to ICE position 2 Loose connections 22 Tighten 3 Bad contacts 3 Check for continuity and replace Supply Voltage 1 Too low 1 Rearrange power supply connection to get enough capacity 2 Power supply shared with 2 Rearrange power supply other equipment connection to get enough capacity d Bin Control Thermostat 1 Ambient temperature too cool temperature bulb replace low ambient temperature replace e a 2 Compressor will not start Compressor 1 Wiring to compressor 1 Check for loose connection or open and replace 2 Coil winding opened 2 Check for continuity between terminals and replace replace replace motor will not run broken wire b Fan Motor Pump Motor 1 Coil winding opened 1 Replace c Fan Blade 1 Fan blade bound 1 Check and replace d Pump Motor Impeller 1 Defective or bound 1 Replace and clean impeller e Pump Motor Capacitor 1 Defective 1 Replace f Electronic Controller 1 Defective 1 Replace 4 Defrost cycle time is too a Thermistor 1 See VII 10 Thermistor long attachment for Cube Control 5 Hot gas valve will not a Wiring 1 Loose connectors or 1 Repair or replace open broken wire b Hot Gas Valve 1 Coil winding opened 1 Replace 36 U1VA6060209 U1VA6060209 PROBLEM CHECK POSSIBLE CAUSE REMEDY 6 Water wil
33. osition Close the water supply line shut off valve Water Tank 3 Disconnect the suction tube by compressing both plastic tabs to unlock the joint inthe Suction Tube direction of the black arrows and pulling the tube clear 4 Spread out the tabs on both sides of the water tank to unlock it then pull it out toward you Drain the tank Unlock Unlock 5 After draining slide in the water tank along the rails at the bottom of the right and left brackets until it clicks into place 6 Refit the suction tube onto the water tank inlet by pushing the joint to lock it securely in the direction of the arrows A loose fitting may cause a water leak 7 Slowly pour the cleaning solution into the water tank 8 Move the control switch to the WASH position 9 After circulating the cleaning solution for about 30 minutes move the control switch to the OFF position 21 10 Remove the water tank drain it and replace it as described in 3 through 6 11 Open the water supply line shut off valve 12 Move the control switch to the WASH position to circulate clean water for about 5 minutes 13 Move the control switch to the OFF position then remove the water tank it and replace it as described in 3 through 6 14 Repeat 12 and 13 three more times to rinse thoroughly c Sanitizing Solution Dilute 0 5 fl oz 14 8 ml or 1 tbs of 5 25 sodium hypochlorite solution chlorine bleach with 1 gallon 3
34. panel 3 Recover the refrigerant and store it in a proper container if reguired by an applicable law See 1 b Refrigerant Recovery 4 Remove the terminal cover on the compressor and disconnect solderless terminals 5 Disconnect the discharge and suction pipes using brazing equipment 6 Remove the hold down bolts washers and rubber grommets 7 Slide and remove the compressor Unpack the new compressor package 8 Attach the rubber grommets of the previous compressor 9 Clean the suction and discharge pipes with an abrasive cloth paper 10 Place the compressor in position and secure it using the bolts and washers 11 Remove plugs from the compressor suction and discharge pipes 12 Braze or solder the access suction and discharge lines Do not change this order with nitrogen gas flowing at a pressure of 3 to 4 psig 21 to 28 bar 13 Install the new drier See 3 Drier 14 Check for leaks using nitrogen gas at 140 psig 9 65 bar and soap bubbles 15 Evacuate the system and charge it with refrigerant See 1 Evacuation and Recharge 16 Connect the solderless terminals and replace the terminal cover in its correct position 17 Refit the panels in their correct positions 18 Plug in the icemaker or connect the power source Note Hoshizaki recommends that compressor starting components are always replaced at the same time as the compressor 4 2 U1VA6060209 016060209 3 Drier 1 Unplug the ic
35. revent damage to the freezer mechanism do not operate this icemaker when the water supply is OFF or if the pressure is below the recommended minimum water pressure of 10 PSIG 0 7 bar Stop the icemaker until proper water pressure is resumed Attach the brass fitting included in the accessory bag as shown in Fig 5 The brass fitting size is 1 2 FPT and must be connected only to a potable water supply Awater supply line shut off valve and drain valve must be installed Water supply pressure should be a minimum of 10 PSIG 0 7 bar and a maximum of 113 PSIG 7 5 bar If the pressure exceeds 113 PSIG 7 5 bar use a pressure reducing valve Drain outlet hose is 5 8 16 mm ID and internally connected to a 2 3 17 mm OD drain outlet For gravity drain installation drain must be 1 4 fall per foot 2 cm fall per meter on horizontal runs to get good flow Keep a more than 2 vertical inch 5 vertical cm air gap between the drain pipe end and the drain Icemaker The drain pipe must be so laid as to prevent a backflow into the storage bin For condensate pump installation for exiting drain refer to condensate pump instruction manual Aplumbing permit and services of a licensed plumber may be required in some areas This icemaker should be installed in accordance with applicable national state and local regulations 17 Fig 5 Water Supply Inlet 3 4 BSP Threads Attach brass fitti
36. rge R134a Never allow the oil in the vacuum pump to flow backward 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 R134a 8 Refrigerant Leak Check Refrigerant leaks can be detected by charging the unit with a little refrigerant raising the pressure with nitrogen and using an electronic detector Do not use air or oxygen instead of nitrogen for this purpose or rise in pressure as well as in temperature may cause R134a to suddenly react with oxygen and explode Be sure to use nitrogen to prevent explosion b Refrigerant Recovery The refrigerant must be recovered if required by an applicable law No refrigerant access valve is provided in the unit Install a proper access valve on the low side line ex compressor process pipe Recover the refrigerant from the access valve and store it in proper container Do not discharge the refrigerant into the atmosphere When replacing the drier take the opportunity to also fit a high side access valve for ease of charging liquid refrigerant 40 U1VA6060209 c Evacuation and Recharge 1 Attach charging hoses a service manifold and a vacuum to the system If possible use guick release connectors onto the access valves especially on the high side 2 Turn on the vacuum pump 3 Allow the vacuum pump to pull down to a 29
37. st once a month by using a neutral cleaner Rinse thoroughly after cleaning The storage bin is for ice use only Do not store anything else in the bin Keep the area around the icemaker clean Dirt dust or insects in the icemaker could cause electrical damage to the equipment or harm to individuals 1 Cleaning and Sanitizing Instructions WARNING 1 HOSHIZAKI recommends cleaning this unit at least once a year More frequent cleaning however may be required in some existing water conditions 2 To prevent injury to individuals and damage to the icemaker do not use ammonia type cleaners 3 Always wear liquid proof gloves to prevent the cleaning and sanitizing solutions from coming into contact with skin a Cleaning Solution Dilute 5 fl oz 148 ml of recommended cleaner Hoshizaki Scale Away or LIME A WAY Economics Laboratory Inc with 1 gallon 3 8 I of warm water IMPORTANT For safety and maximum effectiveness use the solution immediately after dilution 2 0 U1VA6060209 U1VA6060209 b Cleaning Procedure The cleaning process will remove lime deposits from the water system 1 Remove all ice from the evaporator and the storage bin Note To remove cubes on the evaporator move the control switch to the OFF position and move it back to the ICE position after 3 minutes The defrost cycle starts and the cubes will be removed from the evaporator 2 Move the control switch to the OFF p
38. t to make changes in specifications and design without prior notice 8 U1VA6060209 U1VA6060209 II General Information 1 Construction Top Panel Ice Making Mechanism Bin Control Scoop Holder Thermostat Slope Front Panel Magnet Catch Door Control Switch Louver 2 Compartment Bracket Evaporator O Separator Ice Chute Pump Motor Nozzle Water Tank Hose Joint 10 U1VA6060209 U1VA6060209 lll Installation and Operating Instructions 1 Checks Before Installation Visually inspect the exterior of the shipping container and report any severe damage to the carrier WARNING Remove shipping tape s and packing as follows If any are left in the icemaker it will not work properly IMPORTANT 1 Remove shipping tape holding the door 2 Ensure all components fasteners and thumbscrews are securely in place Remove the package containing accessories Remove shipping tape holding the separator Check that refrigerant lines do not rub or touch lines or other surfaces Check that the compressor is snug on all mounting pads See the nameplate on the upper right part of the left side panel and check that your voltage supplied corresponds with the voltage specified on the nameplate 2 Location WARNING Normal operating ambient temperature should be within 45 F 7 C to 100 F 38 C Normal operating water temperature shou
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