Hoshizaki IM-500SAA User's Manual
Contents
1. WASH Power is supplied to water pump this allows for cleaning and or sanitizing RESET If the reset is pushed after the unit is turned to ICE the soft start 1s skipped after 3 seconds the water pan starts to open in the initial cycle If pressed and released during operation water pan opening or closing defrost or freeze cycle the machine will return to the initial cycle within 3 seconds and the water pan starts opening If pressed and released while the machine is in the off or bin control cycle the machine will return to initial cycle within 3 seconds the bin control cycle ends and the water pan starts to open If pressed and released while machine 1s in the off on an error the machine will return to the initial cycle within 3 seconds the error 1s reset and the water pan starts to open NOTE When the machine returns to the initial cycle by the reset switch the water temperature is assumed to be 32 F 0 C below 48 F 9 C the freeze backup timer is extended Hall IC input XA Connector 4P En Control Swich 4 dii 1 11 L T Segment Double Th Digit Display outs od ons a SEA See DE Relay y Deiva Gna Coneco 3 b Data InpubDuipui PA Cannet Ao BP Resat Butan m i S G BD BN AC Inout VH Cannector 2P Close Button Lier La RUE Orive Output VH Connector SP Pump kioto Het Gas Vabe Fan Mega Wader Yaba I C Input YTH Connector 3P Compia AC Relay Orive2. AM SERVICE TRAINING Featuring the IM S00SAA 80047 9 10 13 2 All IM models have similar sequence of operation This manual is designed as a generic IM Training manual The Hoshizaki IM series ice machine uses a horizontal evaporator design which forms a square cube shape with a small dimple _ IM CUBE DIMENSIONS e approximate size image not to scale ELECTRICAL CONNECTION r Rr HE E Rr A standard 120 volt power cord field Failure to properly ground or wire supplied provides the electrical this unit could result in death connection The unit is designed to serious injury or severe damage operate on a separate 20 amp circuit to the icemaker The white lead Z basysrl aimless The water supply connection is 1 2 FPT See diagram i l fitting and is located at the top right side of the unit A minimum 1 4 water line 115 120 60 1 is required for proper operation JUNCTION BOX The drain connection is 3 4 FPT fitting L located on the right rear of the unit A SERIER standard 3 4 MPT fitting can be used to connect this drain f 7 The ABS water plate sprays water up into the evaporator cells to form the square IM cube The moveable water pan assembly includes the water plate reservoir pan and pump motor assembly Tension springs connect two cam arms to the water plate assembly An actuator motor rotates the cam arms to raise and lower the water pan during the ice
3. Oulipul VH Cornmnecio WF mfi 4 v i Cube Corina Thenmisior Input XA Conner 2P 10 CONTROL BOARD A solid state board controls the IM operation The control board is factory adjusted to produce consistent ice in all ambient conditions NO SEASONAL ADJUSTMENTS ARE REQUIRED If it becomes necessary to install a new IM 500SAA control board part number P01873 01 the model code must be programmed into the board before the unit will operate properly Follow the steps below for programing 1 Once the board has been installed apply power to the unit and turn the switch on 2 00 will appear on the display of the new board 3 For the IM 500SAA set the model code to 0g 4 Press service button 1 to increase the first digit and service button 2 to increase the second Note It should only be necessary to adjust service button 2 in order to get the IM SOOSAA model code of 08 displayed 5 Digits will appear in the following order 0 1 2 3 4 5 6 7 8 9 A B C D E F 6 When a valid model code is displayed the dot in the bottom right of the display turns on 7 When the desired model code 08 is displayed press the reset button to save the setting ON will appear in the display Preventative maintenance Follow these steps to allow the unit to operate efficiently Clean the condenser once a year using a brush or vacuum Check and clean the inl
4. leads follow the steps below 1 Disconnect the connector CN13 on the board 2 Remove the screw and the thermistor holder on the evaporator 3 Immerse the sensor part in a glass containing ice and water for 2 or 3 minutes 4 Check the resistance between thermistor leads Normal reading is within 5 to 7 KQ Replace the thermistor 1f it 1s outside the normal reading A Water Circuit and Refrigerant Circuit Waber WATER PAN CLOSES FREEZE When the water pan closes and the hall IC turns on the water valve opens to supply ice making water for a specific time The supply time varies between startup reset and end of bin control cycle between partial flush and full drain NOTE Full drain flush After a freeze cycle ends the unit drains all remaining water out of the tank and refills for the next freeze cycle Partial drain flush default setting After a freeze cycle ends the unit leaves remaining water in tank and adds water for the next cycle After water has been supplied the pump motor starts after 30 seconds the thermistor senses the temperature that will be added with a predetermined offset value and used as the water temperature for the freeze cycle pan opening defrost and pan closing cycle The freeze cycle is considered to be 100 complete when the predetermined target and the integrated values are reached To reduce ice forming on the water pan when the freeze completion rate reaches 100 with an amb
5. Motor Valve LU Strainer Compressor Water Circuit Refrigerant Circuit 19 A Error Codes Caution Codes e When the control board detects an error the display shows one of the following error and caution codes in the display mode Operation depends on the type of error s The error and caution codes other than E1 and E2 are indicated as EE in the 7 segment display at the time of occurrence The error log is indicated up to five errors from the latest entry Freeze backup timer 45 minutes after water pan starts to close counts up before freeze cycle completes and switch evaporator temperature is 0 C or higher Defrost backup timer 30 minutes counts up before defrost cycle Press reset completes Water pan has not fully opened within 60 seconds and 3 minutes have passed Halt Press reset even with opening failure control switch Unit resumes operation after 60 minutes Binn and repeats the above error seconds and 3 minutes have passed Pies rassi even with closing failure control Water pan has not fully closed within 60 Unit resumes operation after 60 minutes ill Shut down and repeats the above error Press reset Freeze error Shut down E2 Defrost error Water pan opening error Water pan closing error High temperature error Condenser thermistor Condenser thermistor circuit is open or ee Replace shorted for 2 seconds thermistor error note Model setting data memory IC is Te
6. 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 B Wiring Diagram EE 1157 60 1 NTROLLER ISE COPPER E VY WIRRFSC CORAL TURE CONTROL SR COPPER SUPPLY WIRES Pc ea apa npes pegeri l oH RK fay L aP air HT a C COMPRESSOR Jou A 7 RUSE 3 WH Lol 9 SA Soll DEU A BO V CONTROL 7 E Sat SWITCH lop _ 8l_ J 3 mal Tar et LACT MOTOR Hof o SNLO gon DBU BU EGARD w IY I gol BK BK o iP ae eal f 90l perl TRANS TSS i L A FORM R Tk LRS wd PCS WC WR RCS a lo oro t t GNI 7 wk wm U c CN2 tol PUMP MOTO R ym a BRI 7 ol Sor me til HOTGAS VALVE op R B i CAP _ Gol eS wn b EJ 16 1 PAN KOTOR gol WATER VALVE 45 TSO ear 1 n 9 op ey IA zel OR m POWER RELAY NS 2ol fei I i PE J G W Bade 0 uF 3 EEEN TECTUATOR MOTOR GY QY Electrical Specifications The unit is 115 volt 60 hz 1 ph The IM SOOSAA should be connected to a separate 20 Amp circuit 18 A Water Circuit and Refrigerant Circuit Water Valve Valve Thermistor 5 Controller HL Board Expansion Valve Bulb ee on gt Water Pump Condenser THM UT ED Hot Gas L W lt Fan
7. e Replace control defective board E9 Cube control thermistor error EE E3 EE E4 EE ES EA EC a Water Ed regulator error Evaporator temperature stays 60 C or i iinn Press reset higher for seconds or more switch Cube control thermistor circuit is open or Replace shorted for 2 seconds Shut down thermistor Cooling water cannot stop by water regulator error and thermistor senses set point or lower temperature Gais Press reset switch Note No condenser thermistor is provided on IM 500SAA so EE E9 error will not occur B Service Diagnosis Refrigeration circuit E1 LE componente _ components Replace sd Fan Motor Hot gas valve l Closing failure Replace Hotgas valve T Opening failure Replace Defective Replace EE Control board Ed Water regulator Clogged with foreign matter Corroded spring Replace o Note No condenser thermistor is provided on IM 500SAA so E9 error will not occur 20 C No Error Code Indication Possible Cause Icemaker will T Power source Turned off Tumon not start Supply voltage too low T banni resumed Not connected properly Reconnect Open circuit damaged Replace Replace Fuse Blown out Check for cause Replace Bin control switch Stuck on other parts e g ice Remove ice quide Short circuit display shows Replace on Fan motor Replace Low RPM Replace Broken fan Ss Re
8. econds True False 8 The water valve will remain energized for the entire harvest cycle regardless of how long True False 9 The IM SOOSAA makes a square cube True False NOTE Quiz answers are at the bottom of next page NOTES Quiz answers 1 False 2 False 3 Open 4 R 404A 5 True 6 True 7 False 8 False 9 True 24
9. et water valve screen as needed to assure proper water flow Clean and sanitize the water distribution system annually using the recommended cleaner See below for detailed information on cleaning the Filter water system Do not remove Wipe down the exterior using a soft cloth and neutral cleaner Cleaning tips e A detailed cleaning label is located on the back of the ice maker front panel More detailed instructions are included in the customers Instruction Manual or in the product Service Manual SV WN e Always follow the cleaning instructions and use the recommended ice machine cleaner 12 1 Dilute approximately 7 2 fl oz 214 ml of recommended cleaner Hoshizaki Scale Away with 0 8 gal 3 0 lit of water 2 Turn off the power supply 3 Remove all ice from the storage bin 4 Remove the front panel 5 Remove the screw and then move the water tank drain pipe to the drain position See Fig 5 Use the screw to secure the water tank drain pipe in the Normal Position drain position 6 Make sure the control switch is in the ICE position and then replace the front panel Py Tank Drain 7 Close the icemaker water supply line shutoff valve rire 8 Turn on the power supply for 3 minutes The water tank drains and cubes Drain Position are removed from the evaporator 9 Turn off the power supply 10 Remove the front panel and top panel 11 Move the control s
10. he tank in the next freeze cycle Imperfect ice Insufficient water production supply Water supply pressure too low Remove cause Water leaks from water tank or water plate Water valve Water leaks from water supply pipe joint Replace connection hose Water plate Spray Noles onan Large hole Refrigeration Gas leaks low refrigeration Repair cubes circuit capacity Condenser Not clean low condensing Filter clogged Installation site No clearance at right side and rear Ambient temperature above lower temperature Water leaks Insufficient water Water supply pressure too low supply Freeze cycle Ambient temperature too high time is too long lower temperature Condenser Not clean low condensing capacity Air filter clogged Refrigeration Gas leaks low refrigeration Repair circuit Capacity 22 23 IM SERIES REVIEW QUIZ Choose the best answer for each question below 1 The IM control board is located in the rear or the unit True False 2 The IM unit uses a thermostatic bin control True False 3 The bin control switch must OPEN or CLOSE to shut the unit down 4 The IM series uses R 404A or R 134A refrigerant 5 The IM 500SAA only uses one thermistor located on the evaporator True False 6 The freeze cycle is temperature and time terminated True False 7 On the initial freeze cycle the water valve will remain open for 30 s
11. ient temperature below 86 F 30 C the hot gas valve opens and closes two times to raise the water pan temperature and the actuator motor starts to open the water pan The freeze cycle is not considered complete and the pump motor and fan motor continue The unit will continue to cycle between freeze and harvest until the bin control opens signaling a full bin or until power is interrupted Thumscrew Bin Control Switch Bracket Bin Control Switch The IM 500SAA uses a mechanical bin control located on the right rear side of the ice drop zone This control will open when ice pushes against the switch if the switch stays open for more than 10 seconds the machine will start the bin control cycle starts and the machine will shut down after the next defrost cycle After the bin control stays closed for more than 80 seconds the bin control cycle will end and the machine will restart the hot gas valve opens 30 seconds before the icemaker restarts After the bin control cycle ends or when the power supply is turned on the water pan starts to open When the water pan opens and the hall IC turns on the bin control cycle starts after 10 seconds and the ice maker stops g7 SERVICE SERVICE 9 The control switch is marked ICE OFF WASH and is located on the upper right front of the unit OFF No power supplied to unit ICE Starts the automatic Ice making process
12. making cycle The horizontal evaporator and water distribution system are unique to the Hoshizaki IM series The IM 500 makes ice on a horizontal evaporator and uses R 404a refrigerant The IM S500SSA sequence of operation will be explained in the following pages The IM 500SAA unit uses a mmm combination thermistor and control seme board to control the sequence of A operation a SOFT START When the toggle switch is placed in the x ON position and the bin control calls T VU for ice the unit will begin in the soft J start the display will say on and the hot gas valve will open after 30 seconds the initial harvest cycle begins if the reset switch is pressed during the 30 sec standby time the unit will skip soft start and immediately starts operation Starting the unit in harvest allows the compressor to start up in basically an unloaded condition greatly extending the life of the compressor This Operation is common among all Hoshizaki cube icemakers WATER PAN OPENS HARVEST During the initial harvest the compressor hot gas valve and the actuator motor starts to open after 20 seconds the water valve will energize to supply defrosting water for a specified time The time varies depending on the incoming water temperature above or below 48 F 9 C also in initial cycle the water temp is not detected and assumed to be below 48 F 9 C resulting in a longer defrosting water supply time The ope
13. ning backup timer starts counting when the water pan starts to open if the hall IC magnetic switch does not turn on within 3 min the display will show EE and the unit stops for 60 minutes if it reoccurs after the unit resumes display will show EE and the unit shuts down and records as E3 in the error history Thermistor As soon as the pan starts to open the defrost backup timer starts if the thermistor mounted on the evaporator does not reach the defrost completion temperature before the timer times out at 30 min the display will show E2 and the unit stops if the HGV does not open this could also give you an E2 error The harvest cycle is controlled by thermistor when the defrost completion temperature of 18 5 C or more is reached the HGV closes the fan motor starts and the water pan starts closing As before there is a timer that starts as soon as the water pan starts to close If the hall IC magnetic Switch does not turn on within 3 min the machine will stop and give a EE error and the machine shuts down for 60 minutes if the error reoccurs after restart the unit will shut down again and again shows EE recorded as E4 in the error history NOTE in the initial cycle or when the water is below 48 F 9 C the water valve will open to supply defrosting water for 10 second after the water pan starts to close To check the resistance between thermistor
14. place OFF or WASH position Move to ICE position Air filter Dirty air filter or condenser Clean Temperature Ambient temperature too Reduce temperature Warm Slab does not Over extended break into Water plate Obstacle caught between Remove obstacle separate cubes evaporator and water plate lcemaker will Bin control switch Out of position Place in position not stop when actuator Broken Replace bin is filled with Bin control switch Out of position T Place in position ice Broken T Replace Bin control switch Out of position detector Broken Replaces Bin control micro Disconnected from switch box switch Seizing with open contacts Control board Defective Replace _ Cloudy cubes Water quality High hardness Switch to full drain flush see note below Abnormal noise Pump motor Bearing worn out T Replace Vapor lock Clean water valve filter Check water supply cycle time setting Fan touching obstacle Remove obstacle Cubes drop Refrigeration Gas leaks long defrost cycle Repair separately circuit Cam arm Worn out Replace Note Full drain flush After a freeze cycle ends the unit drains all the remaining water in the tank and refills the tank in the next freeze cycle Partial drain flush default setting After a freeze cycle ends the unit leaves the remaining water in the tank and adds some water to fill t
15. wer supply after 15 minutes 11 Open the icemaker water supply line shut off valve 12 Remove the front panel 13 Move the control switch to the ICE position 14 Replace the front panel 15 Turn on the power supply for 3 minutes The water tank drains 16 Turn off the power supply 17 Repeat steps 15 and 16 three more times to rinse thoroughly 18 Repeat steps 1 through 17 one more time 19 Remove the front panel 20 Remove the screw then move the water tank drain pipe to the normal position See Fig 5 Use the screw to secure the water tank drain pipe in the normal position 21 Replace the front panel 22 Clean the storage bin liner using a neutral cleaner Rinse thoroughly after cleaning 23 Turn on the power supply to start the automatic ice making process D Performance Data APPROXIMATE ICE aan PRODUCTION PER 24 HR TEMP F C 50 10 70 21 ee 70 21 80 27 90 32 100 38 APPROXIMATE ELECTRIC 70 21 CONSUMPTION adrar 90 32 100 38 APPROXIMATE WATER 70 21 CONSUMPTION PER 24 Bae 90 32 100 38 FREEZING CYCLE TIME 70 21 80 27 90 32 10038 HARVEST CYCLE TIME 70 21 80 27 90 32 fa 100 38 HEAD PRESSURE 70 21 80 27 90 32 ps 100 38 SUCTION PRESSURE 70 21 80 27 90 32 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 4500 BTU h AT 90 F 32 C WT 70 F 21 C TOTAL HEAT OF REJECTION FROM CONDENSER 1 000 BTU h AT 90 F 32 C WT 70 F 21 C
16. witch to the WASH position 12 Slowly pour the cleaning solution over the top of the evaporator and into the water tank Do not splash or spill the solution onto other parts 13 Replace the front panel and top panel in their correct positions 13 14 Turn on the power supply to start the washing process 15 Turn off the power supply after 30 minutes 16 Open the icemaker water supply line shut off valve See Fig 4 17 Remove the front panel 18 Move the control switch to the ICE position 19 Replace the front panel 20 Turn on the power supply for 3 minutes The water tank drains 21 Turn off the power supply 22 Repeat steps 20 and 21 three more times to rinse thoroughly SANITIZING 1 Dilute a 5 25 sodium hypochlorite solution chlorine bleach with water add approximately 0 4 fl oz 12 ml to 0 8 gal 3 0 lit of water 2 Close the icemaker water supply line shut off valve 3 Turn on the power supply for 3 minutes The water tank drains 4 Turn off the power supply 5 Remove the front panel and top panel 6 Move the control switch to the W ASH position 7 Slowly pour the sanitizing solution over the top of the evaporator and into the water tank Do not splash or spill the solution onto other parts 8 Replace the front panel and top panel in their correct positions 9 Turn on the power supply to start the sanitizing process 10 Turn off the po
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