Hoshizaki Dishwasher JWE-24000CUA-L-25B User Manual

SERVICE MANUALHOSHIZAKIDISHWASHERJWE-2400CUA-L-25BJWE-2400CUA-R-25BNO. J002-794ISSUED: APR. 1, 2011REVISED: SEP. 6, 2011MODEL

52. JWE-2400CUA-R-25BUnits: mm [in.]

6II. General InformationA. Construction1. DishwasherThe illustration below shows JWE-2400CUA-L-25B (left-to-right rack fl ow).Operation PanelEmergency

72. Booster TankTop ViewFront ViewSheathed Heater [H7 - 15]Hot Water Outlet PipeOverfl ow PipeThermostat PlateInlet Water Valve [WV]Inlet PipeThermal P

83. Control BoxControl BoardFan MotorFanTerminal BlockTB1: For DishwasherTB2: For Booster TankConveyor Speed SwitchRelayX10: Rinse PM ControlX11: Serv

9B. Functions1. Increasing Rinse Water Flow RateUpper Rinse Spray ArmThe rinse water fl ow rate is factory adjusted to 1.90 gal/min (7.2 L/min). To inc

104. If BT WLF/S fails, BT BUWLF/S assumes control. If BT BUWLF/S remains closed for 1 minute, o1 or o2 error appears in the display. For details, see

11WT. The conveyor does not start during the supplementary fi ll cycle. "A3" appears in the display and the "AUTO FILL" lamp fl ashe

12D. Sequence of Operation Flow ChartCycle Steps 1. Auto Fill Cycle 2. Ready Cycle (Unit Inactive) 3. Wash Cycle 4. Rinse Cycle • SPS must be clos

13E. Timing Chart1. Auto Fill Cycle"ON/OFF" Button ONOFF"AUTO FILL" Lamp ONOFF"READY" Lamp ONOFF"WASH" Lamp ON

142. Wash Cycle/Rinse Cycle"ON/OFF" Button ONOFF"AUTO FILL" Lamp ONOFF"READY" Lamp ONOFF"WASH" Lamp ONOFFServi

IMPORTANTOnly qualifi ed service technicians should install, service, and maintain the unit. No service or maintenance should be undertaken until the t

15F. Control Board and Operation Board• A Hoshizaki exclusive solid-state control board and operation board are employed in all Hoshizaki dishwasher

162. Control Board LayoutInputs and outputs are laid out on the control board as illustrated below.Buzzer Output XA Connector

173. Control Board Diagram Booster Tank Thermistor Wash Tank Thermistor Buzzer Output X5X4MC3X10MC1X13X2X3X6X757Table Limit S

184. Operation Panel LayoutThe operation panel is mounted on top of the unit (wash compartment exit side) and is connected to the CN5 connector on the

19c) "READY" LampLights up when the auto fi ll cycle completes and the dishwasher is ready to wash.d) "WASH" LampLights up during w

20b) Service Menu ChartService MenuItem and Details Setting Range DisplayFactory Default01 Extended Wash Cycle Time 1 to 99 seconds(in 10 second steps

218. Temperature Display• Indicates the average water temperature read by the wash tank or booster tank thermistor. Indicates water temperature select

2211. Operation Time DisplayTo indicate the total hours of operation in the display, press the up button on the operation panel. The number appears fr

234) Set service menu item 19 to ON to stop the beep when the "ON/OFF" button is switched off but to resume fl ashing "Ch" when th

24III. Service Diagnosis WARNING1. This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, el

IMPORTANTThis manual should be read carefully before the unit is serviced or maintenance operations are performed. Only qualifi ed service technicians

25It is recommended to conduct this sequence check in the auto fi ll cycle after draining the wash tank and booster tank. See “II.C. Sequence of Operat

26B. Error CodesIn the event of operation outside of normal parameters, the control board identifi es the issue with an error code. For further service

27Error CodeProblem Operation ResetH4Booster Tank Thermistor Error (open)Thermistor senses abnormal temperature (at or below -6°F (-21°C)).Normal (Boo

283. Error Code Detailsa) Auto Fill Error (A1)• If the water level sensor in the wash tank is not closed at the end of the auto fi ll cycle, the unit s

29Sticking (with float in “ON” position). Check and clean. See “III.D. Float Switch Check and Cleaning.”Defective (with internal contacts in “ON” posi

30b) Booster Tank Auto Fill Error (A2)• In the auto fi ll cycle, if the booster tank water level fl oat switch does not close within 10 minutes (or 20

31c) Wash Tank Water Level Error (A3)• If the water level in the wash tank goes below the water level sensor in "READY" mode or during opera

32d) Booster Tank Water Level Error 1 (Booster Tank Water Level Float Switch Closed) (o1)• If both the booster tank water level fl oat switch and the b

33e) Booster Tank Water Level Error 2 (Booster Tank Water Level Float Switch Open) (o2)• If the booster tank water level fl oat switch is open and the

34f) Wash Tank Thermistor Error (H1, H2)• If the wash tank thermistor senses a temperature at or above 231°F (111°C) (2.4kΩ), the thermistor leads are

12. Special Modes ---------------------------------------------------------------------------------------22III. Service Diagnosis --------------------

35g) Booster Tank Thermistor Error (H3, H4)• If the booster tank thermistor senses a temperature at or above 231°F (111°C) (2.4kΩ), the thermistor lea

36h) ROM/RAM Error (H5)• If a ROM/RAM error is detected, the unit shuts down, "H5" appears in the display, and the buzzer sounds.• After rep

37j) Conveyor Overload or Table Limit Error 1 (L1)• If the inverter sends an overload signal or the table limit switch closes, the unit shuts down, &q

38k) Conveyor Overload or Table Limit Error 2 (L2)• If the unit shuts down with "L1" in the display and restarts in 3 seconds after the caus

39l) Booster Tank Error (b1)• If the booster tank error input contacts stay open for more than 2 seconds, "b1" appears in the display, and t

40m) Booster Tank Water Level Safety Error (b2)• If the booster tank water level safety fl oat switch opens after the booster tank water level fl oat sw

41C. Service Flow Charts1. Unit Will Not StartMain Power Supply Unit will not start Problem Possible Cause Remedy Emergency Stop ButtonPressed.Turn cl

42ContinueTransformerOpen coil winding. Replace.Wiring to Control BoardLoose connections or open.Check continuity and repair or replace. Control Boar

432. Dishes Not CleanLow Wash Pump OutputClogged with foreign matter. Clean.Voltage drop. Remove cause. Vapor lock due to clogged tank filter. Clean

44 Conveyor Speed Too high. Adjust to medium or low. ContinueDetergent No supply. See “III.C.5. No or Inadequate Detergent/Rinse Aid Supply.”Insuffici

Important Safety InformationThroughout this manual, notices appear to bring your attention to situations which could result in death, serious injury,

453. Inadequate RinseLow Rinse Pump OutputClogged with foreign matter. Clean.Rinse water line scaled.Clean.Voltage drop. Remove cause. Inadequate rin

464. Dishwasher Will Not Start Wash/Rinse CycleDishwasher will not start wash/rinse cycle Problem Possible Cause Remedy Wash Pump InoperativeProtector

475. No or Inadequate Detergent/Rinse Aid Supply6. Wash Tank Water BoilsNote: See “III.E. Thermistor Check” and “IV.H. Removal and Replacement of The

487. Wash Tank Water Not DrainingDrain Hose Clogged. Unclog.Wash tank water not drainingProblem Possible Cause Remedy Pinched. Correct.Clogged. Uncl

49D. Float Switch Check and Cleaning (for Booster Tank Water Level Float Switch and Backup Water Level Float Switch)If an abnormal input signal is fo

50E. Thermistor CheckIf the error code “H1” “H2” “H3” or “H4” or an abnormal temperature [above 231°F (111°C) or below -6°F (-21°C)] appears in the di

51IV. Removal and Replacement of Components WARNING1. This unit should be diagnosed and repaired only by qualified service personnel to reduce the

524) Make sure the O-rings are in place, and attach the wash pump motors to the tank discharge outlets and suction inlets. Secure the connections with

536) Disconnect the rinse pump motor wiring at the closed end connectors.7) Remove the nut from the fl exible tube at the rinse pump motor discharge

54BandBooster Tank Discharge PipeRinse Pump MotorRinse Pump Motor Suction Inlet Flexible Tube[JWE-2400CUA-L-25B]* View without rinse pump motorBooster

1I. Specifi cationsA. Specifi cation Sheet1. JWE-2400CUA-L-25BDISHWASHER SIDE BOOSTER SIDE 3 phase 3-wire 208-230V/60Hz (±10%) / 2 power supply lines㩷2

55D. Removal and Replacement of Gear Motor1) Use the “ON/OFF” button on the operation panel to turn off the unit, then turn off the dishwasher and bo

56E. Removal and Replacement of Conveyor1) Remove the 4 bolts (2 at rear, 2 at both sides) securing the rear rack rail.2) Hold the conveyor, and lif

57F. Removal and Replacement of CrankshaftTo remove:1) Remove the front panel.2) Remove the conveyor.3) Loosen the 6 hexagon socket set screws for

58G. Removal and Replacement of Control Box WARNINGDo not touch the live parts during a trial run or servicing operations.NOTICEBe careful not to

592) Remove the front panel.3) Slide out the control box.4) Remove the plastic bag covering the thermistor connector, then disconnect the thermistor

60Stay - OPJoint - Operation (B)Operation Panel (B)Tube (A)Tube (B)Operation BoardConnectorCable - Operation3) Disconnect the control board connectors

61J. Removal and Replacement of HeaterWhen replacing the wash tank heater or the booster tank heater, remove the nuts using a 7/8" crowfoot wrenc

62* The illustration shows the boster tank heaterBoltBandHeaterNutWasherHeaterBandCross-section: band fi ttingSquare HoleK. Removal and Replacement of

63L. Removal and Replacement of ThermostatNOTICEAlways use the recommended sealant (high thermal conductive type), Model KE4560RTV manufactured by SHI

64V. Cleaning and Maintenance InstructionsA. Daily MaintenanceIMPORTANTBe sure to clean the dishwasher after closing time every day. It is diffi cult

22. JWE-2400CUA-R-25BDISHWASHER SIDE BOOSTER SIDE 3 phase 3-wire 208-230V/60Hz (±10%) / 2 power supply lines㩷208V : 18.4kVA(51.1A) 230V : 22.1kVA(5

656) To remove the lower rinse spray arm, push down the rising part to unhook, pull off the end of the pipe towards you, then take it out from between

6612) Check the pump filters inside the wash tank. If they are clogged, clean them with a scouring pad.SilverwarePump Filter11) Clean the wash compart

6717) To replace the upper wash spray arm, hold it with the nozzles facing down, and insert the joint into the pipe located at the back of the wash co

6820) To replace the lower rinse spray arm, put it between the rack rails, insert the end of the pipe into the joint, then turn and hook the front.Rin

6923) Close the service panel.WARNINGTo prevent entrance of dust or insects and injuries by a sudden drop, do not leave the service panel open.B. Week

70D. Descaling (As Required)Use a descaler according to the supplier’s instructions. WARNING1. Carefully follow any instructions provided with the

711) Press the “ON/OFF” button on the operation panel. The display and lamps go off.2) Turn off the water heater.3) Turn off the gas and water supplie

72F. Long Storage, Relocation, Disposal, TransferWhen preparing the unit for long storage, shut down and clean the unit according to sections A - E.If

73VII. Technical InformationA. Water Circuit• The wash water is sprayed by the two wash pumps from the upper and lower wash spray arms into the wash

74B. Wiring Diagram

3B. Nameplate RatingFor certifi cation marks, see the nameplate on the dishwasher.We reserve the right to make changes in specifi cations and design wit

4C. Dimensions/Connections1. JWE-2400CUA-L-25BUnits: mm [in.]