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Hoshizaki JWE-620UA-6B User's Manual

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2. 10 d 11 C Sequence of Operation Flow Chart 12 D Control Board and Operation Board 14 1 Control Board Location 14 2 Control Board Layout 15 Control Board Diagram 16 4 Operation Panel Layout 18 ee eee eee 18 6 Controls Adjustments and Lamps 18 7 Service Menu and Error Log 19 8 Temperature Display 22 9 Error Codes 23 10 Buzzer 23 11 Special Modes 23 Service Diagnosis 26
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9. Operation Panel Cable Operation Connector Tube B Operation Board Tube A 62 V Cleaning and Maintenance Instructions A Daily Maintenance IMPORTANT Be sure to clean the dishwasher after closing time every day It is difficult to remove heavy soils left overnight In high temperature conditions food scraps will rot and affect sanitary operation 1 Take out scraps from the removed tank filters and wash them clean with a scourer IMPORTANT To prevent damage do not hit the filters on the sink to drop scraps or to drain the filters 2 Turn and loosen the upper spray arm nut Upper Wash Spray Arm in the direction of the arrow Support the upper rinse spray arm and remove it together with the upper wash spray arm Spray Arm Nut Upper Rinse Spray Arm 3 Turn and loosen the lower spray arm nut in the direction of the arrow Lift off the lower rinse spray arm and remove the lower wash spray arm Spray Arm Nut 4 If the wash spray arm and rinse spray arm nozzles are clogged use a wire or brush to unclog and wash them clean 9 Clean the wash compartment by lifting off the separator toward you Remove any scraps from inside the wash compartment and wash tank Use a scourer to wash off heavy soils oeparator IMPORTANT To prevent damage do not hit the separator on the sink to drop scraps or to drain the separator 63 Pump Filter 6 Check the pump filt
10. gt U Packing U Packing Water Supply Pipe Correct Installation Incorrect Installation 2 Rinse Water Line Connection Inside Double Pipe he pipe is under pressure inside and outside Inner Pipe of Double Pipe LE duo j Rinse Water gt Wash Pump Inner Pipe Correct Installation Incorrect Installation 59 3 Header Rinse Spray Arm and Double Pipe Connection Inner Pipe of Double Pipe Rinse Shaft Inner Pipe of Double Pipe inse Shaft Lower Spray Arm Upper Spray Arm Correct Installation Correct Installation M Removal and Replacement of Thermistor CAUTION The thermistors are fragile handle very carefully Always use the recommended sealant high thermal conductive type Model KE4560RTV manufactured by SHINETSU SILICONE Part Code 60Y000 11 or Part Code 4A0683 01 or equivalent 3 Do not shorten or cut the thermistor leads 1 Move the power switch to the OFF position then turn the power supply Lockout Tagout to prevent the power from being turned back on inadvertently 2 Remove the front panel 3 Remove the plastic bag covering the thermistor connector then disconnect the thermistor connector If replacing the wash tank thermistor disconnect the leads from the wash tank electrode If replacing the internal booster tank thermistor disconnect the closed end connectors for the internal booster tank water level float switch and the internal booster ta
11. Control Box Control Box Cover B Control Box Cover A Control Board The illustration shows relay X13 provided only for Auxiliary Code A 1 and later Transformer Buzzer Bushing 14 2 Control Board Layout Inputs and outputs are laid out on the control board as illustrated below Signal Input XA Connector 6P Buzzer Output XA Connector 2P Signal Input XA Connector 10P Power Input VH Connector 4P Thermistor Signal Input XA Connector 4P V V V CN2 Power Input VH Connector 6P CN8 CN9 CN10 lt High CN1 1 CN7 e 6 Lxi Low VR1 1 Buzzer LX2 X3 sd Output VH Connector 7P CN6 1 XA _ wes 7 X5 4 CN3 CNS XB gt _ CN13 CN12 1 Output VH Connector 5 _ 2 4 Operation Board XA Connector 5 XH Connector 3P not in use XH Connector 2P not in use XA Connector 3P not in use Heater Control Signal Input XA Connector 8P 15 3 Control Board Diagram a Auxiliary Code U 1 U 2 U 3 V 0 0 200V from Transformer Communication Operation Panel Board Shielded Wire Transformer 11V 7 7 1 O 1 Buzzer Output 9 2 JWE 620UA 6B Pins 1 4 shorted 3 phase control Pins 1 4 open Booster Tank control CN10 e 1 4 CN6 CN1 CN13 1 2 3 2 1 2 1 CN1 4 JOJO9UUOD vx Joj euuo 506000 rg External
12. Water Level Float Switch Open circuit Repair or replace Defective Replace Check and clean See Float Switch Internal Booster Tank Sticking Backup Water Level Float Switch Check and Cleaning Defective Replace Connector not properly Control Board connected Defective Reconnect Replace Note See III D Float Switch Check and Cleaning f Wash Tank Thermistor Error H1 H2 If the wash tank thermistor senses a temperature at or above 231 F 111 C 2 4kQ the thermistor leads are considered shorted and the wash tank heaters de energize H1 appears in the display and the buzzer sounds If the wash tank thermistor senses a temperature at or below 6 F 21 C 517 the thermistor leads are considered open and the wash tank heaters de energize H2 appears in the display and the buzzer sounds After replacing the failed component the alarm resets See the chart below for possible causes and remedies Note When this error occurs the auto fill cycle will not start Operation Code Error Continues wash tank heater off Thermistor senses abnormal temperature H1 H2 Item Possible Cause Remedy Connector not properly Thermistor connected Open circuit H2 Reconnect Replace Short circuit H1 Replace Defective Replace Connector not properly Reconnect Control Board connected Defective Replace Note
13. have remained closed for 1 minute Item Possible Cause Remedy Control relay contacts Replace Water Valve fused 7 Sticking Check and clean See Float Switch Internal Booster Tank Water Level Float Switch Check and Cleaning Defective Replace Check and clean See Float Switch Internal Booster Tank Backup Water Level Float Switch Sticking Check and Cleaning Defective Replace Control Board Note See III D Float Switch Check and Cleaning 33 e Internal Booster Tank Water Level Error 2 Internal Booster Tank Water Level Float Switch Open 02 If the internal booster tank water level float switch is open and the internal booster tank backup water level float switch has remained closed for 1 minute the internal booster tank heaters de energize o2 appears in the display and the buzzer sounds The error resets if the internal booster tank backup water level float switch opens or when the ON OFF button is used to turn the unit off and then back on See the chart below for possible causes and remedies Operation Error Internal booster tank water level float switch is Continues internal booster tank heater off open and internal booster tank backup water level switch has remained closed for 1 minute Item Possible Cause Remedy Check and clean See Float Switch Check and Cleaning Internal Booster Tank Sticking
14. 1 CN2 6 Relay X1 1 i l Booster Tank Heater X2 O Wash Tank Heater X3 5 Rinse Pump e Wash Pump CN3 X5 4 2144 X6 i i pmo 1 XT Q CN4 JOJOBUUOD vx 1 O Wash Tank Electrode 2 Water Level Sensor 5 Door Switch 6 kg ince NR Internal Booster Tank Water Level Float Switch 1 O Internal Booster Tank Backup Water Level Float Switch 4 5 6 T 8 9 Phase Reversal Input 0 1 Connectors CN 1 4 are VH Connectors 16 b Auxiliary Code 1 and Later q 200V from Transformer Transformer 11V 7 7V p 000000 1 CN1 4 1 CN2 6 X1 I 1 Booster Tank Heater Panel x2 i Shielded Wire LI Wash Tank Heater 5 I Wash Pump I eo Water Valve X6 O X7 5 CN11 9 e External Rinse Agent Feeder 214 8 Buzzer Output 1 0 DI S Wash Tank Electrode 210 Water Level Sensor CN10 JWE 620UA 6B 1 Pins 1 4 shorted 3 phase control 5 Door Switch O 4 epe x 610 _ S CN9 Internal Booster Tank Water Level Float Switch 1 CN6 B 0 Internal Booster Tank Backup Water Level Float Switch 1 2 4 B gt lt 3 X 6 CN12 gt 8 1 E 9 CY C Phase Reversal Input
15. HOSHIZAKI DISHWASHER MODEL JWE 620UA 6B SERVICE MANUAL IMPORTANT Only qualified service technicians should install service and maintain the unit No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual Failure to service and maintain the equipment in accordance with this manual may adversely affect safety performance component life and warranty coverage Hoshizaki provides this manual primarily to assist qualified service technicians in the maintenance and service of the unit Should the reader have any questions or concerns which have not been satisfactorily addressed please call write or send an e mail message to the Hoshizaki Technical Support Department for assistance HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Attn Hoshizaki Technical Support Department Phone 1 800 233 1940 Technical Support 770 487 2331 Fax 1 800 843 1056 770 487 3360 E mail techsupport hoshizaki com Web Site www hoshizaki com NOTE To expedite assistance all correspondence communication MUST include the following information Model Number Serial Number Complete and detailed explanation of the problem IMPORTANT This manual should be read carefully before the unit is serviced or maintenance operations are performed Only qualified service technicians should install service and maintain the unit Read the warnings contained in this boo
16. Alert function OFF Wash Tank Refill Alert factory default ON Total Operation Time Before Alert 1 to 99 Ch goes off after 10 minutes Display Hold Function factory default ON Beep stops and Ch goes off when ON OFF button is switched off factory default Power Supply Lock OFF Function ON Ch keeps flashing even if service menu 22 is set to OFF 25 Service Diagnosis A WARNING 1 This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire 2 Risk of electric shock Use extreme caution and exercise safe electrical practices 3 Moving parts e g fan blade can crush and cut Keep hands clear 4 Do not make any alterations to the unit This could cause water leak electric shock or fire 5 To help reduce the risk of electric shock do not touch switches with damp hands A Diagnostic Procedure The diagnostic procedure is a sequence check of the switches and sensors while operating the unit by using the switch open closed display mode Switch Open Closed Display Mode The switch open closed display mode indicates when the door switch wash tank water level sensor internal booster tank water level float switch and internal booster tank backup water level float switch are open or closed To enter the switch open closed display mode use the ON OFF button to turn on the unit
17. Control Box 2 Internal Booster Tank IE Inlet Water Valve Thermal Protector heater Mo boil dry protection J U Packing TH4 TH6 am Groove must face backward For details see IV L U Packing Installation Instructions Thermistor hot water temperature control TH2 Sheathed Heater Internal Booster Tank Thermostat Plate E Water Level Float Switch F S1 T a H4 6 Internal Booster Tank Backup Water Level Float Switch sr 0 5 12 7mm LLL F S2 Internal Booster as wp Tank Drain Hose JG 7 E dU Legend F S float switch H heater TH thermistor 9 3 Control Box a Auxiliary Code U 1 U 2 U 3 V 0 0 Wash Tank Heater Control Wash PM Control Internal Booster Tank Heater Control Legend CB control board GFCl ground fault circuit interrupter MC magnetic contactor PM pump motor RX phase reversal relay TR transformer X relay b Auxiliary Code 1 and Later Wash Tank Heater Control Wash PM Control Internal Booster Tank Heater Control Legend CB control board GFCl ground fault circuit interrupter contactor PM pump motor RX phase reversal relay TR transformer X relay Sequence of Operation The steps in the sequence are as outlined below 1 Auto Fill Cycle a Auxiliary Code U 1 U 2 U 3 V 0 0 AUTO FILL lamp flashing and
18. IN EE _ 949 9 T E 4078 fg a 0115813 5 d i E 46 9919009 14477108 _ rg aM E RC SQQ NOILVSEJO YOVIE Xd 0081400 HSVM YOOTS TYNIHWER 380874 1009 30709 TAIM MS 1907 NY 394500 SCRITTE INVI HS ISNIN ONY INFOWALAC Y MEAD 14 COW WON 1 D M ma M 7 GCHEN 4I ATAVTIVAY 108105 CIV 909 40 x ccs AL EIN B 91 SERRE _ i WOES IV ISNT NE xe ao Mx0 9 YELVEH M6 9 VALVAH IN qe ea YNVL 4915009 YNVI YALM yd x gg vg ag vg l U 8 i er 1 J T org 7 COND 1 a d 02 a 0 1400 2 ou us E ME AIONA 45 x 1 o ME CIN ANANI CON bredis TON Feud gt 3000 9 i 1 L 16 y 1 L G 41 1 a x 4 g O 96V P 1199 9p 9 90V iu 997 vc oV jon 9 ep 9 00 esee QD E tol gl all PAR UO yg 27E IE yg 8 5 ih Qo A 5148 50 TW Ww habits fe d T c AVIAN IX OIX 01 61111 YOLOVINOD LR y OLLSNOVW EN Ta Ad TSVHd t ug LNV t n HA eA A eT A802 J Md Lo 0T 09 080 800 40
19. Press and hold the up and down buttons for 3 seconds The following appears in the display Close the door and start a cycle The display indicates whether a switch is open or closed When a switch is closed its corresponding segment is illuminated in the display See the illustration below To resume the normal display press the down button A Internal Booster Tank Backup Water Level Float Switch Door Switch Internal Booster Tank Water Level Float Switch Wash Tank Water Level Sensor 26 It is recommended to conduct this sequence check in the auto fill cycle after draining the wash tank and internal booster tank See Sequence of Operation for further details 1 Move the power switch GFCI to the OFF position 2 Pull out the overflow pipe to drain the wash tank 3 Drain the internal booster tank through the drain hose 4 Replace the overflow pipe and drain hose in their correct positions 5 Enter the switch open closed display mode according to the above procedure 6 Auto Fill Cycle When the door is closed and the door switch closes segment B in the display comes on and the inlet water valve opens to start water supply After a while the internal booster tank water level float switch closes segment C in the display comes on and the inlet water valve closes to stop water supply The rinse pump starts to feed water to the wash tank When the internal booster tan
20. RINSE STANDARD or LONG lamp on If WT WLS is open when power is supplied and the ON OFF button is pressed the AUTO FILL lamp flashes and the auto fill cycle starts WV energizes When BT WLF S closes WV de energizes RPM energizes and power is supplied to RFT RPM energizes and power is supplied to RFT for length of time set by the rinse cycle time setting For details see Rinse Cycle Time service menu item 03 in I D 7 b Service Menu Chart RPM then de energizes for 10 seconds and power is cut to RFT for 10 seconds RPM energizes de energizes and power is supplied to and cut to RFT the number of times set by the auto fill cycle setting For details see Auto Fill Cycle service menu item 07 in II D 7 b Service Menu Chart During the auto fill cycle BT WLF S opens closes to energize de energize WV At the end of the auto fill cycle there is a 5 second dwell time CB checks WT WLS If WT WLS is closed BZ beeps the AUTO FILL lamp goes off and the READY lamp comes on If WT WLS is open BZ beeps continuously the AUTO FILL lamp goes off and A1 flashes in the display For details see III B 3 a Auto Fill Error A1 Note 1 If DS opens during the auto fill cycle the AUTO FILL lamp goes off RPM de energizes and power is cut to RFT When DS closes again the AUTO FILL lamp starts flashing and the unit resumes cycling RPM and power to RFT for the remaining number of times determine
21. Rack Excessively dirty Prewash Dishes Continue 41 No supply See 5 No or Inadequate Detergent Rinse Aid Supply Detergent Insufficient supply Refill or adjust detergent feeder Unspecified detergent Use specified used detergent only Dirty Drain wash tank and Wash Tank Water supply fresh hot water Temperature too low Raise setting or see Heater Not Energized Temperature will not Reset overheat rise thermostat Defective Replace Heater Not Energized Control output error Check input output and repair or replace Magnetic contactor Replace defective Overheat thermostat Reset manually tripped Too short Adjust longer Wash Cycle Time Too low Call electrician Voltage 42 3 Inadequate Rinse Inadequate rinse Problem Possible Cause Remedy Clean Clogged with foreign matter Low Rinse Pump Output Rinse water line Clean scaled Voltage drop Remove cause Rinse pump defective Replace Obstructed by cutlery Reposition the cutlery Rinse Spray Arms or other item or other item Clogged Clean Out of position not Set in position rotating evenly Low pump output See Low Rinse Pump Output Improperly loaded Load correctly Dish Rack Temperature too low Raise setting Rinse Internal Booster Tank Water Too short Adjust longer Rinse Cycle Time Too low Call elect
22. Vinyl Hose Strainer 6 Wash Tank Water Boils Wash tank water boils Problem Possible Cause Remedy Out of position Set in position See 1 0 2 Thermistor Check MN Check for continuity Thermistor Defective Magnetic Contactor Bad contacts Heater Control Relay and replace v Note See Thermistor Check and Removal and Replacement of Thermistor Control Board 45 7 Wash Tank Water Not Draining Wash tank water not draining Problem Drain Hose Drain Pipe Overflow Pipe Possible Cause Clogged Pinched Raised Clogged Remedy Unclog Correct Correct Unclog Float Switch Check and Cleaning If an abnormal input signal is found by Diagnostic Procedure the error code o1 02 is displayed check and clean replace the float switch according to the procedure below 1 Float Switch Check To check the float switch follow the steps below 1 Remove the internal booster tank according to IV C Removal and Replacement of Internal Booster Tank 2 Remove the control box cover and disconnect CN8 connector from the control board see 1 0 2 Control Board Layout 3 To check the internal booster tank water level float switch check for continuity across the red wires 1 and 2 on the CN8 connector Confirm that the float switch is open when the float is down and closed
23. be careful not to damage the wiring and fan at the rear 5 The wires coming out of the bushing at the front of the control box must be sloped downward to prevent entrance of water into the control box Use the wire retainer in front of the rinse pump motor to secure the wiring 6 Make a trial run to check for proper operation 49 Control Box Control Box Cover B Control Box Cover A Control Board The illustration shows relay X13 provided only for Auxiliary Code 1 and later Transformer Buzzer Bushing 50 Removal and Replacement of Internal Booster Tank 1 Move the power switch GFCI to the OFF position then turn off the power supply Lockout Tagout to prevent the power from being turned back on inadvertently 2 Close the water supply line shut off valve 3 Use the internal booster tank drain hose to drain the internal booster tank WARNING To avoid possible burns allow the internal booster tank water temperature to fall below 104 F 40 C before draining 4 Move the power switch GFCI to the ON position Press the ON OFF button to turn on the unit Leave the unit on for 3 to 5 seconds to operate the water valve and remove any water inside the water supply pipe Move the power switch GFCI to the OFF position then turn off the power supply Lockout Tagout to prevent the power from being turned back on inadvertently 5 Loosen and disco
24. board identifies the issue with an error code For further service information see III C Service Flow Charts 1 Error Code Table Wash Tank Auto Fill Error Water level in wash tank does not reach water level sensor after rinse pump has run preset number of cycles Internal Booster Tank Auto Fill Error In auto fill cycle internal booster tank water level float switch does not close within 10 minutes after inlet water valve is opened Wash Tank Water Level Error Water level in wash tank goes below water level sensor in READY mode or in STANDBY Internal Booster Tank Water Level Error 1 Internal Booster Tank Water Level Float Switch Closed Both internal booster tank water level float switch and internal booster tank backup water level float switch have remained closed for 1 minute Internal Booster Tank Water Level Error 2 Internal Booster Tank Water Level Float Switch Open Internal booster tank water level float switch is open and internal booster tank backup water level float switch has remained closed for 1 minute Wash Tank Thermistor Error short Thermistor senses abnormal temperature at or above 231 F 110 C Wash Tank Thermistor Error open Thermistor senses abnormal temperature at or below 6 F 21 C Internal Booster Tank Thermistor Error short Thermistor senses abnormal temperature at or above 231 F 110 C Unit stops Use ON OFF button to turn the unit off an
25. feeder back on If this is not practical consult with an authorized Hoshizaki service company 1 Turn on the gas and water supplies and water heater 2 Pull out the drain pipe 3 Install the upper and lower rinse spray arms only and lower the rack rail With the rack rail Upper Rinse Spray Arm lifted up the door cannot be closed and the unit will not operate L 4 With the door open move the power switch Rack Rail JENNE GFCI to the ON position then press and 22055 hold the STANDBY CLEANING button for 3 SZ seconds SC appears in the display Lower Rinse Spray Arm 65 5 Close the door SC and the AUTO FILL lamp start flashing and the self cleaning cycle begins The buzzer sounds and the operation panel turns off when the cycle ends Move the power switch to the OFF position Turn off the water heater and the gas and water supplies 6 Open the door and remove the upper and lower rinse spray arms Go on to step 8 of V A Daily Maintenance C Weekly Maintenance 1 Heater A WARNING To prevent burns wait for 10 minutes after draining the unit to clean the interior Soft Brush Remove any scraps from the heater and use a soft brush to wash off residue Do not use a metal brush which may damage the surface 2 Exterior 1 Wipe the exterior with a soft cloth 2 Use a damp cloth containing a neutral cleaner to wipe off dirt Then wipe
26. scroll to service menu items 21 through 25 Auxiliary Code U 1 U 2 U 3 0 0 or 26 through 30 Auxiliary Code 1 and later 21 Auxiliary Code U 1 U 2 U 3 V 0 0 or 26 Auxiliary Code A 1 and later is the most recent error Press the MODE button to view the selected service menu item Press the MODE button once again to return to the main service menu list If no errors exist in the log is displayed Press the STANDBY CLEANING button to exit the service menu The display goes blank To erase the log press and hold the up and down buttons for 3 seconds with one of the error codes displayed The unit beeps once and the entire log clears 29 3 Error Code Details a Auto Fill Error A1 If the water level sensor in the wash tank is not closed at the end of the auto fill cycle the unit shuts down A1 appears in the display and the buzzer sounds reset use the ON OFF button to turn the unit off and then back on e See the chart below for possible causes and remedies Code Error Wash tank water level sensor is open at the end of the auto fill cycle Item Overflow Pipe Wash Tank Water Level Sensor Rinse Pump Control Board Operation Unit stops Possible Cause Remedy Out of position Set in position Heavy scale or soil Clean buildup Connector not properly Reconnect connected Open circuit Repair or replace Defective Replace Open circ
27. tank or internal booster tank thermistor Indicates wash tank water temperature in wash cycle rinse internal booster tank water temperature in rinse cycle Press the down button to indicate rinse internal booster tank water temperature instead of wash tank water temperature while the dishwasher Is in READY mode To change the normal temperature display to the rinse internal booster tank water temperature see Water Temperature Display Service menu item 12 in Il 0 7 6 Service Menu Chart The temperature display range is 32 F to 199 F 0 to 99 C To change the display scale see Temperature Display Scale service menu item 13 in II D 7 b Service Menu Chart The temperature display updates every 30 seconds for the wash tank and every 5 seconds for the internal booster tank 22 9 Error Codes In the event of operation outside of normal parameters the control board identifies the issue with an error code and beeps If more than one error occurs the display cycles through the relevant error codes For service corrections see III B Error Codes Wash Tank Auto Fill Error Internal Booster Tank Auto Fill Error M A2 AS _ Wash Tank Water Level Error pce E ee Internal Booster Tank Water Level Float Switch Closed Internal Booster Tank Water Level Float Switch Open H1 _ Wash Tank Thermistor Error short ____ H2 WashTankThermistorEmor open __________ H3 internal Boos
28. the failed component the alarm resets See the chart below for possible causes and remedies Operation Code Error ROM RAM on control board fails Unit stops Item Possible Cause Remedy Defective Replace Control Board i EEPROM Error H6 If an EEPROM error is detected the unit shuts down H6 appears in the display and the buzzer sounds After replacing the failed component the alarm resets See the chart below for possible causes and remedies Operation Code Error EEPROM on control board fails Unit stops Item Possible Cause Remedy Defective Replace Control Board Note See IV N Removal and Replacement of Control Board or Operation Board 37 J Phase Reversal Error H7 If a phase reversal error is detected the unit shuts down H7 appears in the display and the buzzer sounds After correcting the connection the alarm resets See the chart below for possible causes and remedies Operation Code Error Power supply phase is reversed Unit stops Item Possible Case Remedy Connected wrong Swap two of three Electrical Connection positions wires at power switch GFCI connection 38 Service Flow Charts 1 Unit Will Not Start Unit will not start Problem Possible Cause Remedy Off blown fuse or Turn on replace or tripped or defective check and reset Call Main Power Supply circuit breaker electrician if breaker trips rep
29. the handle by hand to prevent it from springing back remove the link arms and related parts from the shaft A WARNING Be sure to hold the handle or it may spring back and cause injury 2 Remove the screws securing the handle to the arms and pull off the handle Note A plastic hammer or other tools may be required to pull off the handle 3 To replace reverse the above procedure 4 Check the door for proper movement Arm Handle Hose A Collar A Handle Collar B Handle Cap Shaft B 54 Removal and Replacement of Door To remove 1 Open the door Remove the lower screws securing the roller units from inside the wash compartment then loosen the upper screws CAUTION Never remove the upper screws or the roller units will fall into the rails and the door cannot be removed If the roller units should fall into the rails use a piece of sheet metal with a hooked end or a wire 2 mm dia with a v shaped end to pick up the roller units 2 Remove the water guard secured with the lower roller unit mounting screws 3 Remove the handle WARNING To reduce the risk of injury follow the instructions in IV F Removal and Replacement of Handle 4 Lift off the door To replace 1 Fit the roller units into the rails with the upper mounting screws held in place 2 Position the door into the rails and fit the door into place The roller unit and screw positions should be aligned 3 Attach
30. x 1 Installation manual x 1 Maintenance sheet English and Spanish x 1 Inlet water strainer amp Packing x 1 Ambient Temperature 41 95 F 5 C 35 C Voltage Range Rated Voltage 10 Recommends Water Hardness 4gpg grains per gallon 68 5ppm or less Water Supply Temperature 110 167 F 43 C 75 C Recommends 140 F 60 C Water Supply Pressure Gauge Static Pressure 10 7OPSIG 0 07 0 48 MPa The rated properties are based on measurements at ambient temperature of 86 F 30 C according to the Technical Requirements for Electrical Appliances We reserve the right to make changes in specifications and design without prior to notice Nameplate Rating HOSHIZAKI DISHWASHER MODEL NUMBER JWE 620UA 6B SERIAL NUMBER AC SUPPLY VOLTAGE 208 230V 60Hz 3PH CAPACITY 15 8kVA 39 7 TOTAL 14 3kW 36 6A WASH PUMP AC230V 4 2AMPS 1HP RINSE PUMP AC230V 0 7AMPS 0 13HP WASH HEATER AC230V 2 3kW RINSE HEATER AC230V 2kW x3 HOSHIZAKI ELECTRIC CO LTD MADE IN SHIMANE JAPAN For certification marks see the nameplate on the dishwasher We reserve the right to make changes in specifications and design without prior notice C Dimensions Connections 922626 S22 176 g az 669 NOLLVTIVISNI YANYOO amp 5 0 9 8 0 6 12 NOISN3MIO 3QISNI T IVLSNI 8 5 LNOAV TVs 5 0VM spun I TIVS 90Ves 1 2
31. 0 to 85 85 pee cen m 5 to 30 times cpm ew qe Standard Mode Long Mode 11 Wash Rinse Cycle Start ON start initiated by closing or oF on Initiation door OFF start initiated by pressing STANDBY CLEANING button 12 Water Temperature Display JON wash water temperature or oF on displayed in ready mode or standby OFF rinse water temperature displayed in ready mode or standb 13 Temperature Display Scale _ Fahrenheit or Celsius Saving Mode Internal Booster Tank Energy Setpoint minus 0 to 22 C 0 to 22 8 Saving Mode Booster Tank Energy Saving Mode Begins 17 Minimum Internal Booster 180 to 185 F Tank Water Temperature 82 to 85 C Start Rinse Cycle Stop Wash Cycle when Internal Booster Tank Energy Saving Mode is 21 Most Recent through Errors 25 Note To erase the log press 21 is most and hold the up and down recent buttons for 3 seconds with one 15 displayed of the error codes displayed if the log is The unit beeps once and the empty entire log clears 20 Service Menu Chart Auxiliary Code 1 and Later Cycle Time 1 to 99 seconds Standard Mode see no 08 for multiplier 41 seconds Long Mode see no 09 for multiplier 11 seconds 03 RinseCycleTime _____ _ 5 to 60 seconds 6 ____ Oto 75 C Oto 75 T3 0 to 85 C 0 to 85 85 __06 INA 5 to 30 times e Standard Mode Long Mode 11 Wash Rinse Cycle Start ON start in
32. 2 10 CN13 1 Connectors CN 1 4 are VH Connectors 17 4 Operation Panel Layout The operation panel is mounted on the side of the unit and is connected to the CN5 connector on the control board Up Button READY Lamp 4 READY Down Button AUTO FILL Wash Tank150 F 66 C Minimum AUTO FILL Lamp Final Rinse 180 F 82 C Minimum RINSE Display WASH B STANDARD MODE EN onc Mode Lamps MODE Button STANDBY STANDBY CLEANING abr STAN DBY CLEANING Lamp CLEANING Button ON OFF Button ON OFF 5 Features a Display This operation board uses an LED display to show system details and diagnostic information b Service Menu and Error Log A service menu 01 to 17 and 21 to 25 Auxiliary Code U 1 U 2 U 3 0 0 or 01 to 23 and 26 to 30 Auxiliary Code A 1 and later allows for viewing and setting of system operating details and parameters See II D 7 Service Menu and Error Log c Error Codes Error codes 1 to A3 H1 to 01 02 designed to protect the unit These codes give information or warnings in the event the unit is operating out of acceptable parameters see III B Error Codes 6 Controls Adjustments and Lamps a HEADY Lamp Comes on when the auto fill cycle completes and the dishwasher is ready to wash b AUTO FILL Lamp Flashes during the auto fill cycle and goes off at the end of the cycle c Mode Lamp
33. 2 5 095 2 08 2 6202 2 8212 6661 2 64 2 102 8 0 02 g cz 659 v iz e vs m 7 8 2 709 9 vz9 OIlN3dO YOOd 2 12 2 156 2 14 2 0281 81 2 LSF Z 9 OZL 5 09 1 6 1 6 LL No Loy N a r3 En ES SUM NOLLNG 440 TANVd 3 0 9 1 lov SLL Co A D L 8 amp S Zv1 9 01 JOZZ 12 279 4008 6 61676 SN N v NL m Er en 8 1002 561 88 6 1 167 CO CA A 1939 HOLIMS M3MOd S9NIN3dO VIG 28 0 SNOILO3NNOO 1 3SNIM NV ONIMIM 430334 IN3933130 ONINAdO VIQ L L L NOLLO3NNOO AlddNS M3MOd 51 68 L ee ISOH 3388n3 4315008 73344 SLOAId l1dd v 137 YSLVM I1dN Z Li 1 131100 General Information A Construction i Tank Filter N Flush Pipe NS ALL Separator 4 Lower Rinse Spray Arm 1 Dishwasher Upper Wash Spray Arm Upper Rinse Spray Arm Lower Wash Spray Arm Adjustable Leg Door Operation Panel Handle Door Switch Voltage Tap Switch Wash Pump Wash Tank Detergent Rinse Aid Feeder Terminal Block Internal Booster Tank Rinse Pump
34. 54 f qu Y L yl a9gl10A z 1949 NIYI MS 4004 AVTHMN ZIX MS HSVM AVTHN TIX 3SNIS 01 S lt ei 9
35. A Diagnostic Procedure n meme 26 B Error Codes nnn nnn nnn oe 28 1 Error Code Table 28 2 Error Code Log 29 Error Code Details 30 C Service Flow Charts 39 1 Unit Will Not Start 39 2 Dishes Not Clean 41 3 Inadequate Rinse 43 4 Dishwasher Will Not Start When Door Closed 24 5 or Inadequate Detergent Rinse Aid Supply 45 6 Wash Tank Water Boils 45 7 Wash Tank Water Not Draining 46 D Float Switch Check and Cleaning 47 1 Float Swi
36. C Removal and Replacement of Internal Booster Tank 47 E Thermistor Check If the error code H1 H2 H3 H4 or an abnormal temperature above 231 F 111 C or below 6 F 21 appears in the display or the wash tank water boils check the thermistor s according to the procedure below If replacement is required see IV M Removal and Replacement of Thermistor 1 Move the power switch GFCI to the OFF position then turn off the power supply Lockout Tagout to prevent the power from being turned back on inadvertently 2 Remove the control box cover then disconnect the CN7 connector from the control board see 1 0 2 Control Board Layout 3 To check the wash tank thermistor check the resistance across the brown wires 1 and 2 To check the internal booster tank thermistor check the resistance across the purple wires 3 and 4 the table below el proper resistance and temperature relations 4 Ifany problem is found replace the thermistor according to Removal and Replacement of Thermistor 48 IV Removal and Replacement of Components A WARNING 1 This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire 2 Move the power switch to the OFF position and turn off the power supply before servicing Lockout Tagout to prevent the power from being turned back on inadverte
37. NING 1 Carefully follow any instructions provided with the descaler 2 Always wear liquid proof gloves and goggles to prevent the descaler from coming into contact with skin or eyes 3 To prevent generation of toxic chlorine gas do not mix a descaler with a chlorinated cleaner 1 Pull out the drain pipe to drain water from the wash tank Start the auto fill cycle to fill the wash tank with hot water 2 Use the ON OFF button to turn off the unit Refer to the descaler s directions and add the proper amount of descaler to the wash tank The wash tank holds 14 3 gallons of water 3 Keep the door open Press and hold the up and down buttons and the MODE button then press the ON OFF button to select the PC Preventative Cleaning mode 4 Close the door to start preventative cleaning 5 Refer to the descaler s directions for the proper duration of cleaning When the proper amount of time has passed press the ON OFF button to stop cleaning 6 Open the door then check the wash tank interior Repeat steps 1 through 5 if necessary A WARNING Be careful not to burn yourself with the hot water or parts in the wash tank 7 Drain the wash tank then start the auto fill cycle Run the dishwasher to rinse the wash tank thoroughly Drain the wash tank 67 F Shutdown CAUTION If there is a possibility that the ambient p temperature may fall below 32 F 0 IUE UN C and freeze the unit be sure to
38. See Thermistor Check and Removal and Replacement of Thermistor 35 g Internal Booster Tank Thermistor Error H4 If the internal booster tank thermistor senses a temperature at or above 231 F 111 C 2 4kQ the thermistor leads are considered shorted and the internal booster tank heaters de energize H3 appears in the display and the buzzer sounds e Ifthe internal booster tank thermistor senses a temperature at or below 6 F 21 C 51 7kQ the thermistor leads are considered open and the internal booster tank heaters de energize H4 appears in the display and the buzzer sounds After replacing the failed component the alarm resets See the chart below for possible causes and remedies Note When this error occurs the auto fill cycle will not start Operation Code Error Thermistor senses abnormal temperature Continues internal H3 H4 booster tank heater off Item Possible Cause Remedy Connector not properly Reconnect Thermistor connected Open circuit H4 Replace Short circuit H3 Replace Defective Replace Connector not properly Reconnect Control Board connected Defective Replace Note See Thermistor Check and Removal and Replacement of Thermistor 6 ROM RAM Error 5 error is detected the unit shuts down H5 appears in the display and the buzzer sounds After replacing
39. To drain BT first move the power switch GFCI to the OFF position Turn off the power supply Lockout Tagout to prevent the power from being turned back on inadvertently Use BT drain hose to drain BT WARNING To avoid possible burns allow BT water temperature to fall below 104 F 40 C before draining Legend BT internal booster tank BTH internal booster tank heater BUWLF S backup water level float switch BZ buzzer CB control board DFT detergent feeder terminals detergent feeder not provided by Hoshizaki DS door switch RFT rinse aid feeder terminals rinse aid feeder not provided by Hoshizaki RPM rinse pump motor WLF S water level float switch WLS water level sensor WPM wash pump motor WT wash tank WTH wash tank heater WV inlet water valve 11 Sequence of Operation Flow Chart JO UI AM Jojeau yue YSeM HLM YSEM LM Jo ow JOSUSS 9 9 JOJEM S 1M BAB JOJEM G 4ATM Jojouu duund J9po9J ple esuu JH U9JIMS J00p Sq jueBJejop 1 4d pJeoq jouo2 g25 p9joeJes ul MOU Syejs yun y JO UI yun Dunes 2 y Aq peuruuejep s w Jequinu OU yun y j one Burusej 5
40. allation Instructions 59 M Removal and Replacement of Thermistor 60 N Removal and Replacement of Control Board or Operation Board 61 1 Control Board sii 61 2 Operation n ne nnn nnn nnn nnn nnn emen 61 V Cleaning and Maintenance Instructions 63 A Daily Maintenance 63 B Self Cleaning 65 C Weekly Maintenance 66 1 LE 66 2 EXIONOT eea 66 Wash Compartment eomm nem 66 D Monthly Maintenance 66 1 Power Switch Ground Fault Circuit Interrupter 66 2 Water Supply Line 66 E Descaling As Required emm 67 _______ ____ _ ____ _ ____ _______ ncnnnnn 68 G Long Storage Reloc
41. ation Disposal Transfer 69 VI Operating InstructionS 70 VII Technical Information 71 A Water CilCuit n ne nnn nnn nnn nnn nn nnn nnn nnn nnn nnn nnn nnn 71 B Wiring Diagram 72 1 Auxiliary Code U 1 U 2 U 3 V 0 0 72 2 Auxiliary Code 1 and Later 73 Important Safety Information Throughout this manual notices appear to bring your attention to situations which could result in death serious injury or damage to the unit A WARNING Indicates a hazardous situation which could result in death or serious injury CAUTION Indicates a situation which could result in damage to the unit IMPORTANT Indicates important information about the use and care of the unit A WARNING This product should be destined only to the use for which it has been expressly conceived Any other use should be considered improper and therefore dangerous The manufacturer cannot be held responsible for injury or damage resulting from improper incorrect and unreasonable use To reduce the risk of dea
42. away the residue with a clean cloth LN Y LY A 3 Wash Compartment 1 Tilt back the rack rail and lift it off the notch TEN 2 Remove any scraps from the wash tank 1 Monthly Inspection 1 Power Switch Ground Fault Circuit Interrupter 1 Open the cover at the front and move the power switch i to the position OFF 7 2 Press the test switch The power switch GFCI should switch Test Switch from ON to OFF 3 If not move the power switch GFCI to the OFF position and contact an authorized Hoshizaki service company 2 Water Supply Line Check the water supply line for damage deformation or water leak marks stains If any of these conditions are found contact an authorized Hoshizaki service company Damage deformation or water leaks 66 Recommendation of safety inspection by service personnel Even if there is no problem with its use a product out of warranty may have a risk of electric shock fire or water leak due to insulation degradation or aging of the electrical parts Ask an authorized Hoshizaki service company for the following inspections charged Dust and dirt build up or water leak inside the unit Aging conditions of the unit and its components Scale silica lime or other foreign matter in the water circuit E Descaling As Required Use descaler according to the supplier s instructions A WAR
43. cle 4 Rinse Cycle The rinse cycle starts automatically after the wash cycle When the mode is set to RINSE the rinse cycle can also be started by either the door switch or the STANDBY CLEANING button For details see Wash Rinse Cycle Start Initiation service menu item 11 in Il 0 7 6 Service Menu Chart Door Switch Start When the READY lamp is on the unit starts operation in the selected mode when DS closes Note If the STANDBY CLEANING button is pressed when the READY lamp is on the READY lamp goes off and the STANDBY lamp comes on When the STANDBY lamp is on the unit will not operate even if DS closes To cancel standby press the STANDBY CLEANING button STANDBY CLEANING Button Start When the READY lamp is on the unit starts operation in the selected mode when the STANDBY CLEANING button is pressed 10 RINSE lamp flashing RPM energizes and power is supplied to RFT for length of time set by the rinse cycle time setting For details see Rinse Cycle Time service menu item 03 in II D 7 b Service Menu Chart RPM draws water from BT and sends it through the rinse spray arms Rinse aid is fed into the rinse water line and sprayed from the rinse spray arms together with rinse water Any excess water in WT drains through the overflow pipe After RPM de energizes the unit enters a 1 second dwell time After the dwell time CB checks BT WLF S If BT WLF S is open the lights in the displa
44. d by the auto fill cycle setting 2 BTH and WTH are de energized during the auto fill cycle 3 If BT WLF S fails BT BUWLF S assumes control If BT BUWLF S remains closed for 1 minute 01 or 02 error appears in the display For details see IIl B Error Codes 4 STANDBY CLEANING button is inactive during the auto fill cycle b Auxiliary Code A 1 and Later AUTO FILL lamp flashing and RINSE STANDARD or LONG lamp on If WT WLS is open when power is supplied and the ON OFF button is pressed the AUTO FILL lamp flashes and the auto fill cycle starts WV energizes When BT WLF S closes WV de energizes and RPM energizes RPM energizes for length of time set by the rinse cycle time setting For details see Rinse Cycle Time service menu item 03 in II D 7 b Service Menu Chart RPM then de energizes for 10 seconds RPM energizes de energizes the number of times set by the auto fill cycle setting For details see Auto Fill Cycle service menu item 07 in II D 7 b Service Menu Chart During the auto fill cycle BT WLF S opens closes to energize de energize WV At the end of the auto fill cycle there is a 5 second dwell time CB checks WT WLS If WT WLS is closed BZ beeps the AUTO FILL lamp goes off and the READY lamp comes on If WT WLS is open BZ beeps continuously the AUTO FILL lamp goes off and 1 flashes in the display For details see III B 3 a Auto Fill Error A1 Note 1 If DS opens duri
45. d then back on Whole unit Use ON OFF button to turn the unit stops off and then back on Auto fill cycle starts After auto fill cycle ends alarm resets Use ON OFF button to turn the unit off and then back on Normal internal booster tank heaters off Use ON OFF button to turn the unit off and then back on Normal internal booster tank heaters off Normal wash tank heaters off After replacing failed component alarm resets Normal wash tank heaters off After replacing failed component alarm resets Normal internal booster tank heaters off After replacing failed component alarm resets 28 Error Internal Booster Tank Thermistor Error Normal After replacing failed component open internal alarm resets booster tank Thermistor senses abnormal temperature heaters off at heater off or below 6 F 21 C ROM RAM Error Unit stops After replacing control board alarm resets Control board ROM RAM fails EEPROM Error Unit stops After replacing control board alarm resets EEPROM fails Phase Reversal Error Unit stops After correcting the connection by swapping two of three wires at the Power supply phase is reversed power switch GFCI connection alarm resets 2 Error Code Log Use the ON OFF button to turn off the unit Press and hold the MODE button then press the ON OFF button 01 should appear on the display Use the down arrow button to
46. drain the unit The water supply line could be damaged and leak water resulting in damage to the surrounding property Water Heater Gas Supply Line Shut off Valve To drain out the water heater close the water supply line shut off valve and water Supply Valve open the drain valve and water supply valve 1 Press the ON OFF button on the operation panel The display and lamps go off 2 Open the cover in the front panel then move the power switch GFCI to the OFF position 3 Turn off the water heater 4 Turn off the gas and water supplies IMPORTANT To operate the water heater follow its instruction manual 5 Tilt back the rack rail IMPORTANT The rack rail may fall down if tilted more than 10 Do not hang anything from it or hit it hard 6 Pull out the drain pipe to drain water from the wash tank A WARNING When pulling out the drain pipe be careful not to touch the wash water It may cause burns or skin irritation Turn the drain pipe if it is hard to pull out 68 7 Remove the right tank filter and then the left tank filter without spilling scraps inside G Long Storage Relocation Disposal Transfer When preparing the unit for long storage shut down and clean the unit according to sections F Move the power switch to the OFF position and turn off the power supply If something seems wrong when restarting the unit after long storage tu
47. eatedly Loose connection Tighten Not within Refer to nameplate specifications and correct OFF position Move to ON position Bad contacts Check for continuity and replace OFF position Move to ON position Power Switch GFCI ON OFF Button Wait for recovery Power Failure Water failure Wait for recovery No Water Supply Shut off valve closed Open Strainer clogged Clean Not fully closed Close Door Out of adjustment and or open Adjust and or replace Door Switch Continue 39 Transformer Open coil winding Check continuity and replace Loose connections or Check continuity and open replace In alarm See III B Error Control Board Codes Defective Replace Wiring to Control Board 40 2 Dishes Not Clean Dishes not clean Problem Possible Cause Remedy Clogged with foreign Clean matter m Vapor lock due to Clean tank filter clogged tank filter Low Wash Pump Output Vapor lock due to use Stop using neutral of neutral cleaner cleaner Wash pump defective Replace Obstructed by cutlery or other item Reposition the cutlery Wash Spray Arms or other item Clogged Clean Out of position not Set in position rotating evenly Low pump output See Low Wash Pump Output Out of position Place in position Filter Clogged Clean Improperly loaded Load correctly Dish
48. er inside the wash tank If it is clogged clean it with a scourer 7 Check the water level sensor If it is dirty clean it with a soft brush Water Level Sensor Location IMPORTANT Do not use a metal brush to clean the water level sensor The surfaces may be damaged or metal particles attached to the sensor may cause malfunction 8 Replace the separator in its correct position 9 Install the left and right tank filters 10 Use one hand to hold the upper wash spray arm on the upper spray arm shaft and use the other hand to tighten the upper spray arm nut in the direction of the arrow 64 11 Place the lower wash spray arm on the lower spray arm shaft and tighten the lower spray arm nut in the direction of the arrow 12 Check that the wash spray arms and rinse spray arms can be turned easily by hand 13 Insert the drain pipe securely Insert Drain Pipe pr Pus i securely 14 Lower the rack rail With the rack rail lifted up the door cannot be closed and the unit Will not operate B Self Cleaning The self cleaning function is to rinse the wash compartment with hot water Use this function after step 7 of V A Daily Maintenance CAUTION If a portion control detergent feeder other than concentration sensitive type is used turn off the power to the detergent feeder Otherwise the detergent may be supplied during the self cleaning cycle After the cycle completes turn the detergent
49. gloves and goggles Before starting disassembly thoroughly read the detergent safety instructions Contact with skin may cause Irritation and contact with eyes may cause blindness When using an acidic descaling cleaner wear rubber gloves and goggles Contact with skin may cause Irritation and contact with eyes may cause blindness Do not use or mix with a dishwashing detergent Some detergents may generate toxic chlorine gas Specifications A Specification Sheet eee WASH TANK SIDE BOOSTER TANK SIDE AC SUPPLY VOLTAGE POWER SUPPLY CAPACITY AMPERAGE STARTING AMPERAGE ELECTRICAL CONSUMPTION HEATER RACK SIZE NUMBER OF LARGE DISHES RACK CYCLE TIME WATER CONSUMPTION OUTSIDE DIMENSIONS EXTERIOR DOOR WASH SYSTEM RINSE SYSTEM PUMP DRAIN SYSTEM START DRY SYSTEM REFUSE DISPOSAL DETERGENT DISPLAY TANK CAPACITY HOT WATER SUPPLY TEMPERATURE CONTROL CONNECTION WATER SUPPLY DRAIN WASH TIME CONTROL RINSE TIME END BUZZER VOLUME ELECTRIC CIRCUIT PROTECTION BOIL DRY PROTECTION SAFETY SYSTEM Ground Fault Circuit Interrupter with Overcurrent Protector Door Switch Emergency Stop by Microprocessor Control phase 3 wire 208 230V 60Hz 410 15 8kVA 39 7A Max Running 36 6A Rated Motor 4 2A 26 0A Rated Motor 1 40kW Power Factor 85 Max 14 30kW 19 3 4 x 19 3 4 500 x 500mm 16 plates 9 1 DIA 53 sec wash 41 sec dwell 5 sec rinse 6 sec dwel
50. he tank and clog the piping and wash pump resulting in reduction of washing performance or pump failure Insert the drain pipe overflow pipe after installing the separator The separator may rise up to create a large gap at the tank overlap Leftovers and other foreign matter may enter the tank and clog the piping and wash pump resulting in reduction of washing performance or pump failure After closing time always clean the tank filters wash rinse spray arms and water level sensor When disassembling the spray arms check and remove any leftovers clogging the pipe joints Otherwise the leftovers may become hard to remove or spoil Read the instruction manual carefully to ensure safe and proper operation 70 Vil Technical Information A Water Circuit Water Circuit in Connection with Electric Booster Upper Wash Spray Arm d Upper Rinse Spray Arm Lower Rinse Spray Arm Backup Water Level Lower Wash Spray Arm Float Switch Detergent Outlet Option Water Level Float Switch Water Level Sensor Internal Booster Tank Heater Water Tank Heater Booster built in Inlet Water Valve Me Hot Water Detergent Feeder not provided Rinse Aid Feeder not provided Filter LA Rinse Aid Detergent Strainer The wash water is sprayed by the wash pump from the upper and lower wash spray arms into the wash com
51. ion factory default OFF 2 Set service menu item 21 to the desired total operation cycles before alert number in display x 10 cycles factory default 2 20 cycles Change this setting according to the advice of the relevant health department and customer demands 24 3 Set service menu item 22 to either OFF Ch goes off after 10 minutes or ON Ch keeps flashing factory default OFF Even if set to ON Ch goes off when the ON OFF button on the operation panel is switched off 4 Set service menu item 23 to ON to stop the beep when the ON OFF button is switched off but to resume flashing Ch when the ON OFF button is switched back on unless the wash tank is refilled factory default OFF Press the power switch GFCI or turn off the external power supply to stop both the beep and Ch indication Set service menu item 23 to OFF to stop both the beep and Ch indication once the ON OFF button is switched off If service menu item 23 is set to ON Ch keeps flashing even if service menu item 22 is set to OFF Alert Function Setting Flow Service Menu 20 Set service menus 21 to 23 Service Menu 21 Alert starts after number in display 1 to 99 x 10 cycles factory default 2 20 cycles Service Menu 22 Ch keeps flashing until ON OFF button is switched off Service Menu 23 Switching off ON OFF button cancels beep but not Ch until wash tank is refilled OFF
52. is closed if service menu item 11 is set for door start press the STANDBY CLEANING button The READY lamp goes off and the STANDBY CLEANING lamp comes on Press the STANDBY CLEANING button again to return to READY For details on start initiation see Wash Rinse Cycle Start Initiation service menu item 11 in II D 7 b Service Menu Chart 3 Wash Cycle The wash cycle can be started by either the door switch or the STANDBY CLEANING button For details see Wash Rinse Cycle Start Initiation service menu item 11 in Il 0 7 6 Service Menu Chart Door Switch Start When the READY lamp is on the unit starts operation in the selected mode when DS closes Note If the STANDBY CLEANING button is pressed when the READY lamp is on the READY lamp goes off and the STANDBY lamp comes on When the STANDBY lamp is on the unit will not operate even if DS closes To cancel standby press the STANDBY CLEANING button TANDBY CLEANING Button Start When the READY lamp is on the unit starts operation in the selected mode when the STANDBY CLEANING button is pressed STANDARD or LONG lamp flashing depending on the wash mode selected WPM energizes and power is supplied to DFT for the length of time set by the wash cycle time setting For details see Wash Cycle Time Standard Mode or Wash Cycle Time Long Mode service menu item 01 or 02 in II D 7 b Service Menu Chart WPM draws water from WT and
53. itiated by closing or oF Initiation door OFF start initiated by pressing STANDBY CLEANING button 12 Temperature Display JON wash water temperature jon or oF displayed in ready mode or standby OFF rinse water temperature displayed in ready mode or standb Temperature Display Scale _ or Celsius Saving Mode Internal Booster Tank Energy Setpoint minus 0 to 22 C 0 to 22 Saving Mode Booster Tank Energy Saving Mode Begins Minimum Internal Booster 180 to 185 F Tank Water Temperature to 82 to 85 C Start Rinse Cycle Stop Wash 13 14 15 6 5 1 Co NO Cycle when Internal Booster Tank Energy Saving Mode is On 18 Wash Tank Heater Pre 0 to 199 seconds 0 to 199 energizing Time N Function OFF lock function off pee OFF alert off 21 OF 2 Alert 20 cycles OFF goes off after 10 minutes 23 Power Supply Lock Function JON Ch keeps flashing until electrode is turned off OFF Ch goes off when ON OFF button is switched off Most Recent Errors Note To erase the log press 26 is most and hold the up and down recent buttons for 3 seconds with one is displayed of the error codes displayed if the log is The unit beeps once and the empty entire log clears 8 Temperature Display Indicates the average water temperature read by the wash
54. k water level goes down the water level float switch opens segment C in the display goes off and the inlet water valve opens to start water supply After the rinse pump is energized for a preset number of times to fill the wash tank the wash tank water level sensor closes and segment D in the display comes on In normal operation the internal booster tank backup water level float switch does not close and segment A in the display stays off If the internal booster tank water level float switch fails or the internal booster tank water level reaches the overflow level segment A comes on 7 Wash Cycle a When the door is opened and closed again and the door switch closes the wash pump starts the wash cycle for a preset time Segments B and D in the display stay on If the internal booster tank is below the predetermined water level segment C in the display stays off The inlet water valve stays open until segment comes When the wash cycle ends and the rinse cycle starts the internal booster tank water level goes down and segment C in the display goes off The inlet water valve stays open until segment C comes on Diagnosis If any problem is found by the above sequence check refer to Error Codes III C Service Flow Charts D Float Switch Check and Cleaning and Thermistor Check 27 Error Codes In the event of operation outside of normal parameters the control
55. klet carefully as they give important information regarding safety Please retain this booklet for any further reference that may be necessary CONTENTS ______ ___________ __ _____ ______ ____ A Specification Sheet 1 B Nameplate Rating 2 C Dimensions ConnectionS 3 General Information 4 Construction eoe ener 4 1 Dishwasher 4 2 Internal Booster Tank D 3 6 Sequence of Operation 8 1 Auto Fill Cycle 8 2 Ready Cycle Unit Inactive 9 Wash Cycle nnn nnn nnn nnn nnn nennen ooo nnn nnn 9 4 Rinse Cycle
56. l 1 sec 0 53Gal cycle 2 0L cycle W25 2 x D25 8 x H60 5 W640 x D655 x H1 537mm Stainless Steel Vertical Sliding Door opening height 18 0 457mm Upper and Lower Triple Spray Arms common arms on top and bottom Upper and Lower Wide Angle Spray Arms Wash 1HP Rinse 0 134HP Draw Out Overflow Pipe Overflow Drain Door Switch start switch mode also available Residual Heat Drying Filter Collection Not Provided Ready Auto Fill Rinse Wash Standard Wash Long Pause Wash Water Temperature Rinse Water Temperature Error 14 3Gal 54L Automatic Hot Water Supply by Microprocessor Control Wash 150 F 66 C min Thermistor Control 168 76 F Inlet 4 Outlet 1 1 2 MPT Standard 1 99 sec in 1 sec steps Long 10 990 sec in 10 sec steps 5 12 sec Adjustable in 1 sec steps 0 Max Adjustable 1 9Gal 7 3L Automatic Hot Water Supply by Water Valve Rinse 180 F 82 C min 163 F 73 F Thermistor Control 182 F 83 C 185 F 85 Microprocessor control Float Switch Bimetal Thermostat Manual Reset Thermistor Auto Reset Water Level Switch Bimetal Thermostat Manual Reset Thermistor Auto Reset WEIGHT Net 24716 112kg Gross 34416 156kg PACKAGE Carton Crate W32 1 xD34 6 xH68 0 815mm x 880mm x 1 726mm CERTIFICATION NSF ANSI 3 ETL Energy Star ACCESSORIES OPERATION CONDITIONS Universal rack 19 3 4 x 19 3 4 x 1 Instruction manual
57. losing Force U Nut Spring Adjuster spring Frame Spring Casing Collar spring Rod Arm Holder Spring Casing Shaft Spring Guide Spring Unit Internal Structure J Adjustment of Door Opening Closing Force Frame Cover The door opening closing force is easily Frame Cover Mounting Screw adjustable as follows 1 Remove the frame cover 2 Remove the U nut 3 Rotate the door opening closing force adjustment screw with a flat blade screwdriver to adjust the S spring tension 7 Door Opening Closing Force Adjustment Screw 57 Removal and Replacement of Flush Pipe 1 Remove the rack rails upper lower wash and rinse spray arms tank filters overflow pipe and separator 2 Remove the rack guide 3 Remove the band 4 Remove the upper and lower headers 5 Unscrew the joint to the pump discharge outlet then remove the flush pipe 6 To replace reverse the above procedure Note Be sure to use new O rings and gaskets 7 Make a trial run and check for water leaks O Ring Header Mounting Screw Header Rack Guide Mounting Screw O Ring Flush Pipe Rack Guide gt gt Mounting Scre 58 L U Packing Installation Instructions CAUTION Incorrect installation of the U packings will cause water leaks 1 Water Supply Pipe and Rinse Pump Connection The pipe is under pressure inside and under atmospheric conditions outside Rinse Pump
58. ly slide the control box into its proper position 9 Replace the front panel 10 Make atrial run and check for water leaks E Removal and Replacement of Rinse Pump Motor 1 Move the power switch to the OFF position then turn off the power supply Lockout Tagout to prevent the power from being turned back on inadvertently 2 Remove the front panel 3 Use the internal booster tank drain hose to drain the internal booster tank WARNING To avoid possible burns allow the internal booster tank water temperature to fall below 104 F 40 C before draining 4 Disconnect the rinse pump motor wiring at the closed end connectors 5 Unscrew the internal booster tank rinse pipe and remove the band from the pipe joint to release the internal booster tank rinse pipe 6 Disconnect the flexible pipe from the rinse pump motor 7 Remove the rinse pump motor 8 To replace reverse the above procedure Note 1 Be careful not to mix up the wire colors Miswiring will cause reversal of the pump motor resulting in improper operation 2 Cover the connections with the original plastic sheet cover and secure with a nylon tie Make sure the connections are situated so that water and condensation cannot reach the connections 3 Be sure to use new O rings and gaskets 9 Make atrial run and check for water leaks 5 F Removal and Replacement of Handle 1 Unscrew the door link shaft with the door closed While holding
59. ng the auto fill cycle the AUTO FILL lamp goes off and RPM de energizes When DS closes again the AUTO FILL lamp starts flashing and the unit resumes cycling RPM for the remaining number of times determined by the auto fill cycle setting 2 BTH is de energized during the auto fill cycle WTH is energized if WT WLS closes during the auto fill cycle 3 If BT WLF S fails BT BUWLF S assumes control If BT BUWLF S remains closed for 1 minute 01 or 02 error appears the display For details see III B Error Codes 4 STANDBY CLEANING button is inactive during the auto fill cycle 2 Ready Cycle Unit Inactive READY lamp and RINSE STANDARD or LONG lamp on WT WLS closed After a rinse cycle RPM de energizes and except Auxiliary Code A 1 and later power is cut to RFT WTH energizes when WT water temperature is at the wash temperature setpoint or lower For details see Wash Temperature Setpoint service menu item 04 in II D 7 b Service Menu Chart WTH de energizes when WT water temperature is 5 F 3 C above the setpoint BTH energizes when BT water temperature is 3 F 2 C below the rinse temperature setpoint or lower For details see Rinse Temperature Setpoint service menu item 05 in II D 7 b Service Menu Chart BTH de energizes when BT water temperature reaches the setpoint WV energizes de energizes when BT WLF S opens closes Note To prevent the wash or rinse cycle from starting when the door
60. nk backup water level float switch 4 Remove the tape or ties securing the thermistor leads then pull out the thermistor from the wash tank or internal booster tank straight towards you 5 Clean out all old sealant from inside the thermistor hole 6 Route the wires from the new thermistor connector through the existing black plastic sleeve 7 Apply the recommended sealant KE4560RTV Part Code 607000 11 4A0683 01 to the end of the new thermistor then insert the thermistor quickly and securely 8 Use tape or ties to secure the thermistor leads in their correct position 9 Reconnect the thermistor connector and the wash tank electrode leads or the internal booster tank water level float switch and internal booster tank backup water level float switch leads then bag and tie them 10 Replace the front panel in its correct position 60 Removal and Replacement of Control Board or Operation Board When replacing a control board or operation board follow the precautions below CAUTION 1 The control board and operation board are fragile handle very carefully 2 The control board and operation board contain integrated circuits which are susceptible to failure due to static discharge It is especially important to touch the metal part of the unit when handling or replacing the control board or operation board 3 Do not touch the electronic devices on the control board or operation board or the back of the control board or o
61. nnect the rinse pump discharge line 6 Remove the band clip connecting the rinse pump and internal booster tank 7 Unscrew and remove the rinse pump from the internal booster tank 8 Loosen and remove the nut connecting the water valve and water supply pipe 9 Remove the screw securing the internal booster tank and the connector for the water valve Pull out the internal booster tank 10 Unscrew the internal booster tank cover 11 To replace reverse the above procedure Internal Booster Tank Cover Mounting Screw Water Supply Pipe SSS 4 Discharge Line Wash Pump Motor Water Valve Internal Booster Tank Drain Hose Internal Booster Tank Cover Control Box S SSSsssss 7 ____ _____ Internal Booster Tank SS Internal Booster Tank Rinse Pump Motor Power Switch Mounting Screw VTL Rinse Pump Motor Removal and Replacement of Wash Pump Motor To remove 1 Move the power switch to the OFF position then turn off the power supply Lockout Tagout to prevent the power from being turned back on inadvertently 2 Drain the wash tank 3 Remove the front panel 4 Carefully pull out the control box 5 Disconnect the wash pump motor wiring at the closed end connectors 6 Disconnect the flexible pipe from the pipe joint 7 Remove the bands and disconnect the wash pump motor from the tank discharge outlet and suction inlet 8 Remove
62. ntly 3 When draining the internal booster tank wait until the water temperature falls below 104 F 40 C to avoid possible burns 4 To avoid possible burns and spills be sure to drain the wash tank and internal booster tank and let the components cool before servicing 5 When disassembling components that have been in contact with detergent wear rubber gloves and goggles Before starting disassembly thoroughly read the detergent safety instructions Contact with skin may cause irritation and contact with eyes may cause blindness 6 When reassembling components be sure to use new O rings and gaskets A Removal of Panels 1 The front panel and side panels L and R are inserted inside the tank rim at the top and secured with 2 screws at the bottom Unscrew and pull down to remove 2 To replace reverse the above procedure B Accessing the Control Box 1 Remove the front panel 2 Remove the screw securing the control box then pull it straight towards you 3 Remove the 1 screw at the front 3 screws at the left side and 1 screw at the right side of the control box securing control box covers A and B Pull control box cover A towards you to avoid the GFCI switch then lift off Next remove control box cover 4 To replace reverse the above procedure Insert control box cover B under the rear hook of the control box Place control box cover A over control box cover B Note When sliding in the control box
63. partment The rinse water is sprayed by the rinse pump from the upper and lower rinse spray arms into the wash compartment The detergent 15 fed by the detergent feeder not provided by Hoshizaki through the detergent outlet not provided by Hoshizaki into the wash tank The rinse aid is fed by the rinse aid feeder not provided by Hoshizaki into the rinse water line and sprayed from the upper and lower rinse spray arms into the wash compartment 71 1 Auxiliary Code U 1 U 2 U 3 V 0 0 B Wiring Diagram TOXLNOD amma LIT 1 Tdd fld Nam 5 e gt o MOTTHA A ____ VM EM 4078 Wid Jd le q q A 9 du J KV _ 19 0 084 4 0 THAT s p AS 0019008 15481 055 TATT 8009 30100 9915000 INV SA 430 9 NVI 99150089 36 9 SHLVaH a M gt otf AUS OT us a me SHANSHOJSSNVAU ANVLIOA OL G1 0 MS S 72
64. peration board 4 Do not change wiring and connections 5 Always replace the whole control board or operation board assembly if it goes bad 6 Do not short out power supply to test for voltage 1 Control Board 1 Move the power switch GFCI to the OFF position then turn off the power supply Lockout Tagout to prevent the power from being turned back on inadvertently 2 Remove the front panel and the control box cover 3 Disconnect the control board connectors from the control board 4 Remove the 2 screws and the control board 5 Install the new control board 6 To replace reverse the above procedure 2 Operation Board 1 Move the power switch GFCI to the OFF position then turn off the power supply Lockout Tagout to prevent the power from being turned back on inadvertently 2 Loosen the 2 mounting screws on the unit frame then remove the operation panel assembly 3 Remove the screw securing the stay OP joint operation B and operation panel B 4 Disconnect the connector for the operation board cable and the cable operation 5 Install the new operation board Note Remove the 2 0 mm dia tube A from the inside groove of the old board and attach the tube A to the new board 6 To replace reverse the above procedure Note Make sure the tubes are snug inside the joint operation B and operation panel B 61 Stay OP Unit Frame Carew Joint Operation
65. r in STANDBY the auto fill cycle starts appears in the display and the buzzer sounds The error resets if the water level sensor is closed at the end of the auto fill cycle See the chart below for possible causes and remedies Operation Code Error Wash tank water level sensor opens in Auto fill cycle starts A3 READY mode or STANDBY Item Possible Cause Remedy Out of position Set in position Overflow Pipe Heavy scale or soil Clean buildup Connector not properly Reconnect connected Open circuit Repair or replace v Connector not properly Reconnect Control Board connected v Wash Tank Water Level Sensor Wash Tank Electrode 32 Internal Booster Tank Water Level Error 1 Internal Booster Tank Water Level Float Switch Closed 01 If both the internal booster tank water level float switch and the internal booster tank backup water level float switch have remained closed for 1 minute the internal booster tank heaters de energize 01 appears in the display and the buzzer sounds The error resets if the internal booster tank backup water level float switch opens or when the ON OFF button is used to turn the unit off and then back on See the chart below for possible causes and remedies Operation Error Internal booster tank water level float switch and Continues internal internal booster tank backup water level switch booster tank heater off
66. rician Voltage 43 4 Dishwasher Will Not Start When Door Closed Dishwater will not start when door closed Problem Setting error Wash Pump Inoperative Rinse Pump Inoperative Door Magnet Detection Error Possible Cause Unit in STANDBY Wash Rinse cycle start initiation Service menu item 11 set to STANDBY CLEANING button Protector tripped Locked with foreign matter Controller input output error Magnetic contactor defective Protector tripped Locked with foreign matter Controller input output error Relay defective Door not fully closed Magnet out of position Door switch out of position Magnetic material caught between door and tank 44 Press STANDBY CLEANING button to cancel STANDBY Change to door switch start Wait until wash pump cools Remove obstacles Check input output and repair or replace Replace Wait until Rinse Pump cools Remove obstacles Check input output and repair or replace Replace Close completely Set in position Set in position Remove 5 No or Inadequate Detergent Rinse Aid Supply No or inadequate detergent rinse aid supply Problem Possible Cause Remedy Refill Detergent Rinse Aid Clogged or kinked Clean or straighten 7 Supply volume too Set to proper volume Detergent Pump low v Supply Line Injector
67. rn off the power supply and immediately contact an authorized Hoshizaki service company WARNING 1 When restarting the unit after long storage contact an authorized Hoshizaki service company To prevent electric shock do not restart the unit by yourself 2 In case of relocation contact an authorized Hoshizaki service company Improper installation may cause water leak electric shock or fire 3 When disposing of the unit contact an authorized Hoshizaki service company Leaving the unit may violate laws or cause an unexpected accident CAUTION When selling or transferring this product tape the instruction manual and the installation manual to the exterior to provide the new owner with information on safe and proper use of the product 69 VI Operating Instructions CAUTION Do not stack racks Otherwise this will cause reduction in the washing effect Door or failure Rack Before loading dishes in the rack be sure to remove any leftovers ex meat fish vegetables chopsticks toothpicks sticks straws paper products and plastics from the dishes They may clog the piping and wash pump resulting in reduction of washing performance or pump failure Install the separator and tank filters without creating a large gap at the tank overlap Do not bang the tank filters and separator to clean or drain or they may be deformed Leftovers and other foreign matter may enter t
68. s Comes on to indicate the selected operation mode and flash during operation 18 Standby Lamp Comes on when the dishwasher 15 in the standby mode The unit will not start even when the door is closed with this lamp on See II D 6 h STANDBY CLEANING button e Up Button Down Button Press to scroll through the service menu and adjust settings Can also be used as follows A Press to display the total number of operations Displays in six digits two digits at a time Example 123 456 times is indicated by Id gt 56 Press to indicate rinse internal booster tank water temperature instead of wash tank water temperature while the dishwasher is in READY mode f Display Indicates wash tank water temperature in wash cycle rinse internal booster tank water temperature in rinse cycle and error codes g MODE Button Press to change the selected operation mode h STANDBY CLEANING Button Press to make the dishwasher inoperable even when the door is closed service menu item 11 set for door start or press to start the selected mode service menu item 11 set for STANDBY CLEANING button start For details see Wash Rinse Cycle Start Initiation service menu item 11 in Il D 7 b Service Menu Chart Press and hold to start self cleaning when the unit has been turned off using the ON OFF button i ON OFF Button Turns the power on and off for operation Note The power switch GFCI supplies power to the
69. s euun pezibJeue S 41M Ld Aq pezibiaue ap pezibsieue AM 9 o 2 9 9u 05 STM LM 99849 SIM LM 999 dnyejs Jelu SIM LM U9UM peziDJeue e o 2 11 Buunp peziDJeue ep si 0 92lAJ8s junoo pezibD1eue ep peziDJeue 5 Ad ues 0 2 15 Sq epjoA2 in 1 sdeis 215 13 Control Board and Operation Board A Hoshizaki exclusive solid state control board and operation board are employed in Hoshizaki dishwasher units All models are pretested and factory set CAUTION 1 The control board and operation board are fragile handle very carefully 2 The control board and operation board contain integrated circuits which are susceptible to failure due to static discharge It is especially important to touch the metal part of the unit when handling or replacing the control board or operation board 3 Do not touch the electronic devices on the control board or operation board or the back of the control board or operation board 4 Do not attempt to repair the control board or operation board 5 Do not short out power supply to test for voltage 1 Control Board Location The control box is located behind the front panel Follow the instructions and warnings for safe and efficient operation of the unit
70. sends it through the wash spray arms When the wash cycle time has expired CB checks BT WLF S If BT WLF S is open the wash cycle is extended and the lights in the display rotate If BT WLF S is closed the unit enters a 5 dwell time and then proceeds to the rinse cycle If BT WLF S does not close within 10 minutes after the auto fill cycle starts A2 appears in the display and the unit shuts down During the 5 second dwell time detergent containing wash water on the door liner and inside the wash spray arms flows back into WT During the wash cycle WTH energizes when WT water temperature is at the wash temperature setpoint or lower For details see Wash Temperature Setpoint service menu item 04 in II D 7 b Service Menu Chart WTH de energizes when WT water temperature is 5 F 3 C above the setpoint BTH energizes when BT water temperature is 3 F 2 C below the rinse temperature setpoint or lower For details see Rinse Temperature Setpoint service menu item 05 in II D 7 b Service Menu Chart BTH de energizes when BT water temperature reaches the setpoint WV energizes de energizes when BT WLF S opens closes Note If DS opens during the wash cycle BZ beeps the STANDARD or LONG lamp goes off the READY lamp comes on WPM de energizes and power is cut to DFT When DS closes again if service menu item 11 is set for door start the STANDARD or LONG lamp starts flashing and the unit starts a new wash cy
71. so used in self cleaning allows the unit to run through 5 consecutive rinse cycles To enter the consecutive rinse mode use the ON OFF button to turn off the unit With the door switch closed press and hold the STANDBY CLEANING button for 3 seconds SC self cleaning appears in the display and the RINSE lamp is on After running through 5 consecutive cycles the buzzer beeps then the unit turns off d Low Water Temperature Lock Function Auxiliary Code A 1 and Later To ensure the NSF specified minimum wash water temperature of 150 F and rinse water temperature of 180 F this unit is provided with a function to lock the washing operation until water in the wash tank reaches 150 F and to extend the washing operation for a maximum of 1 minute until water in the internal booster tank reaches 180 F factory default OFF To activate this function set service menu item 19 to ON referring to II D 7 a Service Menu Access The minimum temperature of 150 F cannot be changed e Alert Function Auxiliary Code A 1 and Later To keep water in the wash tank clean this unit is provided with functions to beep and flash Ch Change in the display when wash water should be changed and to continue this alert until the wash tank is refilled factory default OFF To activate this function set service menu items 20 21 22 and 23 referring to Il D 7 a Service Menu Access 1 Set service menu item 20 to ON to activate this funct
72. t from 180 F to 185 82 to 85 service menu item 17 If the minimum temperature has not been reached at the end of the preset wash cycle time service menu item 01 or 02 the wash cycle is extended up to 60 seconds 23 until the temperature is reached If the temperature is not reached in 60 seconds the unit goes into ready mode This setting only applies when the energy saving mode 15 activated Note The default water temperature drop of setpoint minus 15 F 8 C was based on test results under the following conditions Supply Voltage 230V Water Supply Temperature 109 F 43 C Rinse Cycle Time 6 seconds 0 53 gal rack Dwell Time 5 seconds Ambient Temperature 77 F 25 C b Continuous Wash Mode The continuous wash mode also used when descaling allows the wash pump motor to run continuously In this mode the wash tank heaters and internal booster tank heaters remain de energized To enter the continuous wash mode use the ON OFF button to turn off the unit Press and hold the up and down buttons and the MODE button for 3 seconds and press the ON OFF button As long as the door switch and wash tank water level sensor are closed the wash pump motor runs and power is supplied to the detergent feeder terminals PC preventative cleaning appears in the display and the lamps are off To cancel the continuous wash mode press the ON OFF button c Consecutive Rinse Mode The consecutive rinse mode al
73. tch Check meme 47 2 Float Switch Cleaning 47 Thermistor Check 48 IV Removal and Replacement of Components 49 A Removal of Panels eem emen nme nnn mme 49 B Accessing the Control Box enne 49 C Removal and Replacement of Internal Booster Tank 91 D Removal and Replacement of Wash Pump 52 E Removal and Replacement of Rinse Pump 53 Removal and Replacement of Handle 54 G Removal and Replacement of 59 Removal and Replacement of Spring Unit 96 Removal and Replacement of Spring 56 J Adjustment of Door Opening Closing Force 57 K Removal and Replacement of Flush Pipe 58 L U Packing Inst
74. ter Tank Thermistor Error short H4 internal Booster Tank Thermistor Error open _ 5 ROMRAMEmo _____ EEPROM Error Phase Reversal Error 10 Buzzer At the end of an auto fill cycle or other mode operation the buzzer turns on for 0 1 second and off for 0 1 second 10 times In case of an error the buzzer turns on for 0 1 second and off for 0 9 second repeatedly until the error is reset To turn off the beep press the down button When a button is pressed the buzzer turns on for 0 1 second To adjust the buzzer volume use the volume control on the control board 11 Special Modes a Internal Booster Tank Energy Saving Mode The internal booster tank energy saving mode allows the internal booster tank temperature to drop during periods of inactivity To activate or deactivate the internal booster tank energy saving mode see Internal Booster Tank Energy Saving Mode service menu item 14 in Il D 7 b Service Menu Chart After a period of inactivity from O to 99 minutes service menu item 16 the temperature to maintain is dropped to the setpoint minus O F to 40 F 0 C to 22 C service menu item 15 Adjust the water temperature drop so that the rinse internal booster tank water temperature rises enough to be at least 180 F 82 C after the wash cycle The minimum rinse internal booster tank water temperature for the unit to switch out of the wash cycle and into the rinse cycle can be se
75. th electric shock serious injury or fire follow basic precautions including the following Only qualified service technicians should install service and maintain the unit Electrical connection must be hard wired and must meet national state and local electrical code requirements Failure to meet these code requirements could result in death electric shock serious injury fire or severe damage to equipment This unit requires an independent power supply See the nameplate for proper voltage and breaker fuse size Failure to use a proper breaker or fuse can result in a tripped breaker blown fuse or damage to existing wiring This could lead to heat generation or fire THIS UNIT MUST BE GROUNDED Failure to properly ground this unit could result in death or serious injury Move the power switch to the OFF position then turn off the power supply before servicing Lockout Tagout to prevent the power supply from being turned back on inadvertently not make any alterations to the unit Alterations could result in electric shock injury fire or damage to the unit To avoid possible burns and spills be sure to drain the wash tank and internal booster tank and let the components cool before servicing When draining the internal booster tank wait until the water temperature falls below 104 F 40 C When disassembling components that have been in contact with detergent wear rubber
76. the handle 4 Open the door reinstall the water guard and screw the roller units from inside the wash compartment 5 Check the door for proper movement Water Guard Roller Unit Door Handle Removal and Replacement of Spring Unit 1 Remove the handle WARNING To reduce the risk of injury follow the instructions in IV F Removal and Replacement of Handle 2 Remove the frame covers 3 Loosen the spring unit mounting screws and remove the operation panel 4 Remove the spring unit mounting screws and lift off the spring units 5 To replace reverse the above procedure 6 Adjust the door opening closing force See IV J Adjustment of Door Opening Closing Force Cover Mounting Screw Frame Cover Cover Mounting Screw Frame Cover T S AL Spring Unit Mounting Screw spring Unit Door Lx Operation Panel Handle l Removal and Replacement of Spring 1 Remove the spring units See IV H Removal and Replacement of Spring Unit 2 Remove the U nut 3 Use a flat blade screwdriver to turn the spring rod end in the direction for stretching the spring When the screwdriver cannot turn any more use a wrench 8 to turn the spring rod in the same direction as above to remove the arm 4 Remove the casing shaft and take the spring out of the spring casing 5 To replace reverse the above procedure 56 6 Adjust the door opening closing force See IV J Adjustment of Door Opening C
77. the lower panel mounting screws loosen the upper screws and disconnect the wiring from the panel to remove the wash pump motor together with the panel 9 Remove the wash pump motor from the panel 10 Remove the pipe joint from the wash pump motor To replace Note Be sure to use new O rings and gaskets 1 Attach the pipe joint to the wash pump motor 2 Secure the wash pump motor to the panel and reconnect the wiring 3 Hook the panel on the upper panel mounting screws 4 Make sure the O rings are in place and attach the wash pump motor to the tank discharge outlet and suction inlet Secure the connections with the bands 5 Connect the flexible pipe Discharge Outlet Suction Inlet o O Wash Pump Motor Mounting Bolt Pipe Joint Rinse Pump Flexible Pipe Motor 52 6 Fill the tank with water then check for water leaks from the joints If there is a water leak check the connections and retighten the bands If there are no water leaks drain the tank This inspection cannot detect water leaks from the flexible pipe and pipe joint connection 7 Connect the wiring When finished cover the connections with the original plastic sheet cover and secure with a nylon tie Make sure the connections are situated so that water and condensation cannot reach the connections Note Be careful not to mix up the wire colors Miswiring will cause reversal of the pump motor resulting in improper operation 8 Careful
78. uit Repair or replace Control relay Replace defective Defective Replace Connector not properly Reconnect connected Improper setting Readjust Defective Replace 30 b Internal Booster Tank Auto Fill Error A2 In the auto fill cycle if the internal booster tank water level float switch does not close within 10 minutes after the cycle starts the unit shuts down A2 appears in the display and the buzzer sounds To reset use the ON OFF button to turn the unit off and then back on See the chart below for possible causes and remedies Operation Code Error Internal booster tank water level float switch Unit stops does not close within 10 minutes after the auto fill cycle starts Item Possible Cause Remedy Not ready for operation Get it ready Booster Water supply pressure too low Readjust Filter clogged Clean Strainer Open circuit Repair or replace Water Valve Filter clogged Clean Defective Replace Reconnect Internal Booster Tank Connector not properly Water Level Float connected Switch Open circuit Repair or replace Sticking Check and clean See Float Switch Connector not properly Control Board connected 31 Check and Cleaning Reconnect Wash Tank Water Level Error If the water level in the wash tank goes below the water level sensor in READY mode o
79. unit The unit including heaters is inoperative until the ON OFF button on the operation panel is pressed to turn the unit on 7 Service Menu and Error Log The service menu 01 to 17 and 21 to 25 Auxiliary Code U 1 U 2 U 3 0 0 01 to 23 and 26 to 30 Auxiliary Code 1 and later may be used to change settings acquire diagnostic information and to view error history a Service Menu Access Enter Service Menu Use the ON OFF button to turn off the unit Press and hold the MODE button then press the ON OFF button 01 should appear on the display Scroll Use the up and down arrow buttons to scroll through the service menu list settings and data View Service Menu Setting Press the MODE button to view the selected menu setting Change Setting Use the up and down arrow buttons to change the setting value Return to Service Menu List Press the MODE button once again to return to the main service menu list e Exit Service Menu and Save Settings Press the STANDBY CLEANING button to exit the service menu and save the settings The display goes blank 19 b Service Menu Chart Auxiliary Code U 1 U 2 U 3 V 0 0 Cycle Time 1 to 99 seconds Standard Mode see no 08 for multiplier 41 seconds Long Mode see no 09 for multiplier 11 seconds 03 RinseCycleTime St to 60 seconds ______ 51060 o ____ to 75 C 0 to 75 73 0 to 85 C
80. when the float is up 4 To check the internal booster tank backup water level float switch check for continuity across the blue wires 3 and 4 on the CN8 connector Confirm that the float switch is open when the float is down and closed when the float is up 5 If any problem is found repair or replace the float switch 6 If the float switch is scaled up or dirty clean it according to 2 Float Switch Cleaning 2 Float Switch Cleaning Depending on local water conditions scale may build up on the float switch Scale on the switch can cause the float to stick In this case the float switch should be cleaned 1 Remove the internal booster tank according to IV C Removal and Replacement of Internal Booster Tank 2 Use a soft brush to remove scale or soil on the float swtich or wipe down the float switch with a mixture of 1 part of recommended cleaner Hoshizaki Scale Away or LIME A WAY Economics Laboratory Inc and 25 parts of warm water 3 Rinse the parts thoroughly with clean water 4 If the float switch is removed replace it in its correct position Be careful not to confuse the positions and directions of the internal booster tank water level float switch and the internal booster tank backup water level float switch Make sure the floats can move freely in the vertical directions see 2 Internal Booster Tank 5 Replace the internal booster tank in the reverse order of the removal procedure see IV
81. y rotate until BT WLF S closes If BT WLF S is closed BZ beeps for 2 seconds the READY lamp comes on and the unit returns to the ready cycle If BT WLF S does not close within 10 minutes after the auto fill cycle starts A2 appears in the display and the unit shuts down During the 1 second dwell time hot rinse water on the door liner and inside the rinse spray arms flows back into WT The RINSE lamp keeps flashing During the rinse cycle WTH energizes when WT water temperature is at the wash temperature setpoint or lower For details see Wash Temperature Setpoint service menu item 04 in II D 7 b Service Menu Chart WTH de energizes when WT water temperature is 5 F 3 C above the setpoint BTH energizes when BT water temperature is 3 F 2 C below the rinse temperature setpoint or lower For details see Rinse Temperature Setpoint service menu item 05 in II D 7 b Service Menu Chart BTH de energizes when BT water temperature reaches the setpoint WV energizes de energizes when BT WLF S opens closes Note If DS opens during the rinse cycle BZ beeps the RINSE lamp goes off the READY lamp comes on RPM de energizes and power is cut to RFT When DS closes again if service menu item 11 is set for door start the unit starts a new cycle in the selected mode 5 Drain This unit does not have a drain valve The overflow pipe in WT drains excess water from WT To completely drain WT remove the overflow pipe

Hoshizaki JWE-620UA-6B User's Manual

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