Instruction/ maintenance manual of the product JWE-2400CUA-R-25B Hoshizaki
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SER VICE MANUAL HOSHIZAKI DISHWASHER JWE-2400CUA-L-25B JWE-2400CUA-R-25B NO. J002-794 ISSUED: APR. 1, 201 1 REVISED: SEP . 6, 201 1 MODEL.
IMPOR T ANT Only quali fi ed 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.
IMPOR T ANT This manual should be read carefully before the unit is serviced or maintenance operations are performed. Only quali fi ed service technicians should install, service, and maintain the unit. Read the warnings contained in this booklet carefully as they give important information regarding safety .
12. Special Modes ---------------------------------------------------------------------------------------22 III. Service Diagnosis ----------------------------------------------------------------------------------------24 A. Diagnostic Procedure ---------------------------------------------------------------------------------24 B.
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. W ARNING Indicates a hazardous situation which could result in death or serious injury .
1 I. Speci fi cations A. Speci fi cation Sheet 1. JWE-2400CUA-L-25B DISHW ASHER SIDE BOOSTER SIDE 3 phase 3-wire 208-230V/60Hz (±10%) / 2 power supply line s 㩷 208V : 18.4kVA(51.1A) 230V : 22.1kVA(55.5A) 208V : 20.6kVA(57.2A) 230V : 25.3kVA(63.5A) Max Running 51.
2 2. JWE-2400CUA-R-25B DISHW ASHER SIDE BOOSTER SIDE 3 phase 3-wire 208-230V/60Hz (±10%) / 2 power supply line s 㩷 208V : 18.4kVA(51.1A) 230V : 22.1kVA(55.5A) 208V : 20.6kVA(57.2A) 230V : 25.3kVA(63.5A) Max Running 51.2A Rated Motor 9.0A Max Running 63.
3 B. Nameplate Rating For certi fi cation marks, see the nameplate on the dishwasher . We reserve the right to make changes in speci fi cations and design without prior notice.
4 C. Dimensions/Connections 1. JWE-2400CUA-L-25B Units: mm [in.].
5 2. JWE-2400CUA-R-25B Units: mm [in.].
6 II. General Information A. Construction 1. Dishwasher The illustration below shows JWE-2400CUA-L-25B (left-to-right rack fl ow). Operation Panel Emergency Stop Button Rinse Spray Arm (stationary) R.
7 2. Booster T ank T op View Front View Sheathed Heater [H7 - 15] Hot W ater Outlet Pipe Over fl ow Pipe Thermostat Plate Inlet W ater V alve [WV] Inlet Pipe Thermal Protector [TH7 - 12] (heater boil.
8 3. Control Box Control Board Fan Motor Fan T erminal Block TB1: For Dishwasher TB2: For Booster T ank Conveyor Speed Switch Relay X10: Rinse PM Control X1 1: Service Panel Switch X12: Phase Reversal.
9 B. Functions 1. Increasing Rinse W ater Flow Rate Upper Rinse Spray Arm The rinse water fl ow rate is factory adjusted to 1.90 gal/min (7.2 L/min). To increase the fl ow rate to 3.17 gal/min (12 L/ min), follow the steps below. Hot water supply of at least 3.
10 4. 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 "III.B. Error Codes." 5. The wash/rinse start switch is inactive during the auto fi ll cycle.
11 WT. The conveyor does not start during the supplementary fi ll cycle. "A3" appears in the display and the "AUTO FILL" lamp fl ashes. BZ beeps three times only at the beginning. If WT WLS is still open after the supplementary fi ll cycle, another cycle starts.
12 D. Sequence of Operation Flow Chart Cycle Steps 1. Auto Fill Cycle 2. Ready Cycle (Unit Inactive) 3. Wash Cycle 4. Rinse Cycle • SPS must be closed for RPM to energize • Cycle started by wash s.
13 E. Timing Chart 1. Auto Fill Cycle "ON/OFF" Button ON OFF "AUTO FILL" Lamp ON OFF "READY" Lamp ON OFF "WASH" Lamp ON OFF Service Panel Switch CLOSED OPEN Rin.
14 2. Wash Cycle/Rinse Cycle "ON/OFF" Button ON OFF "AUTO FILL" Lamp ON OFF "READY" Lamp ON OFF "WASH" Lamp ON OFF Service Panel Switch CLOSED OPEN Water Level .
15 F . Control Board and Operation Board • A Hoshizaki exclusive solid-state control board and operation board are employed in all Hoshizaki dishwasher units. • All models are pretested and factory set. NOTICE 1. The control board and operation board are fragile; handle very carefully.
16 2. Control Board Layout Inputs and outputs are laid out on the control board as illustrated below. Bu.
17 3. Control Board Diagram Booster T ank Thermistor W ash T ank Thermistor Buzzer Output X5 X4 MC3 X10 MC1 X1 3 X2 X3 X6 X7 5 7 T able Limit Switch + Conveyor Overload Wash Ta.
18 4. Operation Panel Layout The operation panel is mounted on top of the unit (wash compartment exit side) and is connected to the CN5 connector on the control board. 5. Features a) Display This operation board uses an LED display to show system details and diagnostic information.
19 c) "READY" Lamp Lights up when the auto fi ll cycle completes and the dishwasher is ready to wash. d) "WASH" Lamp Lights up during washing operation. e) Up Button, Down Button Indicates the total hours of operations in six digits by two digits each time.
20 b) Service Menu Chart Service Menu Item and Details Setting Range Display Factory Default 01 Extended W ash Cycle T ime 1 to 99 seconds (in 10 second steps) 1 to 99 30 02 Extended Rinse Cycle T ime.
21 8. Temperature Display • Indicates the average water temperature read by the wash tank or booster tank thermistor. Indicates water temperature selected by the water temperature lamps beside the display . The factory default setting is to indicate wash water temperature and rinse water temperature alternately every 5 seconds.
22 11. Operation Time Display To indicate the total hours of operation in the display, press the up button on the operation panel. The number appears from the hundred-thousands place by two digits each for 1 second. The maximum number is 999,999 hours, and the display does not change for the higher numbers.
23 4) 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 the "ON/OFF" button is switched back on unless the wash water tank is re fi lled (factory default: OFF).
24 III. Service Diagnosis 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 fi re. 2 . Risk of electric shock. Use extreme caution and exercise safe electrical practices.
25 It 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 Operation” for further details. 1) Use the “ON/OFF” button on the operation panel to turn off the unit.
26 B. Error Codes In the event of operation outside of normal parameters, the control board identi fi es the issue with an error code. For further service information, see "III.
27 Error Code Problem Operation Reset H4 Booster Tank Thermistor Error (open) Thermistor senses abnormal temperature (at or below -6°F (-21°C)). Normal (Booster tank heaters off) After replacing failed component, alarm resets. H5 ROM/RAM Error Control board ROM/RAM fails.
28 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 fi ll cycle, the unit shuts down, "A1" appears in the display, and the buzzer sounds. • To reset, use the "ON/OFF" button to turn the unit off and then back on.
29 S ticking (with float in “ ON ” position). Check and clean. See “ III.D. Float Switch Check and Cleaning. ” Defective (with internal contacts in “ON” position).
30 b) 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 minutes in "READY" mode) after the cycle starts, the unit shuts down, "A2" appears in the display, and the buzzer sounds.
31 c) 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 operation, the supplementary fi ll cycle starts, "A3" appears in the display, the "AUTO FILL" lamp fl ashes, and the buzzer sounds three times only at the beginning.
32 d) 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 booster tank backup water level fl oat switch have remained closed for 1 minute, the booster tank heaters de-energize, "o1" appears in the display, and the buzzer sounds.
33 e) 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 booster tank backup water level fl oat switch has remained closed for 1 minute, the booster tank heaters de-energize, "o2" appears in the display, and the buzzer sounds.
34 f) Wash Tank Thermistor Error (H1, H2) • If the wash tank thermistor senses a temperature at or above 231°F (111°C) (2.4k Ω ), the thermistor leads are considered shorted and the wash tank heaters de-energize, "H1" appears in the display, and the buzzer sounds.
35 g) Booster Tank Thermistor Error (H3, H4) • If the booster tank thermistor senses a temperature at or above 231°F (111°C) (2.4k Ω ), the thermistor leads are considered shorted and the booster tank heaters de-energize, "H3" appears in the display, and the buzzer sounds.
36 h) 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 replacing the failed component, the alarm resets. • See the chart below for possible causes and remedies.
37 j) Conveyor Overload or T able Limit Error 1 (L1) • If the inverter sends an overload signal or the table limit switch closes, the unit shuts down, "L1" appears in the display, and the buzzer sounds.
38 k) Conveyor Overload or T able Limit Error 2 (L2) • If the unit shuts down with "L1" in the display and restarts in 3 seconds after the cause of the overload is removed, and the inverte.
39 l) Booster T ank Error (b1) • If the booster tank error input contacts stay open for more than 2 seconds, "b1" appears in the display, and the buzzer sounds. • If the booster tank error input contacts stay closed for more than 2 seconds, the alarm resets.
40 m) Booster T ank Water Level Safety Error (b2) • If the booster tank water level safety fl oat switch opens after the booster tank water level fl oat switch closes, the unit shuts down, "b2" appears in the display, and the buzzer sounds.
41 C. Service Flow Charts 1. Unit Will Not Start Main Power Supply Unit will not start Problem Possible Cause Remedy Emergency S top Button Pressed. T urn clockwise to reset. ON/OFF Button “OFF” position. Move to “ON” position. Power Failure W ait for recovery .
42 Continue T ransformer Open coil winding. Replace. Wiring to Control Board Loose connections or open. Check continuity and repair or replace. Control Board In alarm.
43 2. Dishes Not Clean Low W ash Pump Output Clogged with foreign matter . Clean. V oltage drop. Remove cause. V apor lock due to clogged tank filter . Clean tank filter . Clogged. Dishes not clean Problem Possible Cause Remedy W ash pump defective. Replace.
44 Conveyor S peed T oo high. Adjust to medium or low . Continue Detergent No supply . See “III.C.5. No or Inadequate Detergent/Rinse Aid Su pp l y .” Insufficient supply . Refill or adjust detergent feeder . Unspecified detergent used. Use specified detergent only .
45 3. Inadequate Rinse Low Rinse Pump Output Clogged with foreign matter . Clean. Rinse water line scaled. Clean. V oltage drop. Remove cause. Inadequate rinse Problem Possible Cause Remedy Rinse pump defective. Replace. Rinse S pray Arms Low pump output.
46 4. Dishwasher Will Not Start W ash/Rinse Cycle Dishwasher will not start wash/rinse cycle Problem Possible Cause Remedy W ash Pump Inoperative Protector tripped. W ait until wash pump cools. Locked with foreign matter . Remove obstacles. Controller input/output error .
47 5. No or Inadequate Detergent/Rinse Aid Supply 6. Wash Tank Water Boils Note: See “III.E. Thermistor Check” and “IV.H. Removal and Replacement of Thermistor.
48 7. Wash Tank Water Not Draining Drain Hose Clogged. Unclog. W ash tank water not draining Problem Possible Cause Remedy Pinched. Correct. Clogged. Unclog.
49 D. Float Switch Check and Cleaning (for Booster T ank W ater Level Float Switch and Backup W ater Level Float Switch) If an abnormal input signal is found by “III.A. Diagnostic Procedure” or the error code “o1” or “o2” is displayed, check and clean/replace the fl oat switches according to the procedure below.
50 E. Thermistor Check If 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 display, or the wash tank water boils, check the thermistor(s) according to the procedure below.
51 IV. Removal and Replacement of Components 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 fi re. 2. Use the “ON/OFF” button on the operation panel to turn off the unit, then turn off the dishwasher and booster tank power supplies.
52 4) 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 the bands. 5) T ighten the bracket mounting screws. 6) Fill the tank with water, then check for water leaks from the joints.
53 6) 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 outlet and the bolts securing the bracket to the unit base.
54 Band Booster T ank Discharge Pipe Rinse Pump Motor Rinse Pump Motor Suction Inlet Flexible T ube [JWE-2400CUA-L-25B] * View without rinse pump motor Booster T ank Discharge Pipe Band Rinse Pump Mot.
55 D. Removal and Replacement of Gear Motor 1) Use the “ON/OFF” button on the operation panel to turn off the unit, then turn off the dishwasher and booster tank power supplies. Lockout/Tagout to prevent the power supplies from being turned back on inadvertently.
56 E. Removal and Replacement of Conveyor 1) Remove the 4 bolts (2 at rear , 2 at both sides) securing the rear rack rail. 2) Hold the conveyor , and lift off the rear rack rail. 3) T ake out the conveyor . 4) Remove the left and right frames from the conveyor .
57 F . Removal and Replacement of Crankshaft To remove: 1) Remove the front panel. 2) Remove the conveyor . 3) Loosen the 6 hexagon socket set screws for the stopper and the coupling. 4) Lift off the crank together with the shaft. 5) Loosen the screw securing the crank to release the crank from the shaft.
58 G. Removal and Replacement of Control Box WARNING Do not touch the live parts during a trial run or servicing operations. NOTICE Be careful not to damage the wiring when handling the control box. 1) Use the “ON/OFF” button on the operation panel to turn off the unit, then turn off the dishwasher and booster tank power supplies.
59 2) Remove the front panel. 3) Slide out the control box. 4) 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.
60 Stay - OP Joint - Operation (B) Operation Panel (B) T ube (A) T ube (B) Operation Board Connector Cable - Operation 3) Disconnect the control board connectors from the control board. 4) Slide out the control board. 5) Install the new control board.
61 J. Removal and Replacement of Heater When replacing the wash tank heater or the booster tank heater , remove the nuts using a 7/8" crowfoot wrench. When replacing the booster tank heater , move the clean dishtable above the booster tank before following the procedure below .
62 * The illustration shows the boster tank heater Bolt Band Heater Nut W asher Heater Band Cross-section: band fi tting Square Hole K. Removal and Replacement of Float Switch When replacing the fl oat switch, move the clean dishtable above the booster tank before following the procedure below .
63 L. Removal and Replacement of Thermostat NOTICE 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.
64 V. Cleaning and Maintenance Instructions A. Daily Maintenance IMPOR T ANT Be sure to clean the dishwasher after closing time every day . It is dif fi cult to remove heavy soils left overnight. In high temperature conditions, food scraps will rot and affect sanitary operation.
65 6) T o 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 the rack rails. 7) Remove the separators. 8) T ake out scraps from the removed tank filters, drain pipe and separators, and wash them clean with a scouring pad.
66 12) Check the pump filters inside the wash tank. If they are clogged, clean them with a scouring pad. Silverware Pump Filter 1 1 ) Clean the wash compartment. Remove any scraps from inside the wash compartment and wash tank. Use a scouring pad to wash off heavy soils.
67 17) T o 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 compartment.
68 20) T o 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. Ring 21) Install the curtain (L) in the wash compartment. 22) Install the curtains (S) at the entrance and exit of the wash compartment.
69 23) Close the service panel. W ARNING T o prevent entrance of dust or insects and injuries by a sudden drop, do not leave the service panel open. B. W eekly Maintenance 1. Heater W ARNING T o prevent burns, wait for 10 minutes after draining the unit to clean the interior .
70 D. Descaling (As Required) Use a descaler according to the supplier’s instructions. WARNING 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.
71 1) Press the “ON/OFF” button on the operation panel. The display and lamps go of f. 2) T urn off the water heater . 3) T urn off the gas and water supplies. IMPOR T ANT T o operate the water heater , follow its instruction manual. 4) Open the service panel.
72 F . Long Storage, Relocation, Disposal, Transfer When preparing the unit for long storage, shut down and clean the unit according to sections A - E. If something seems wrong when restarting the unit after long storage, turn off the power supply , and immediately contact an authorized Hoshizaki service company .
73 VII. Technical Information A. Water Circuit • The wash water is sprayed by the two wash pumps from the upper and lower wash spray arms into the wash compartment. • The rinse water is sprayed by the rinse pump from the upper and lower rinse spray arms into the wash compartment.
74 B. Wiring Diagram.
An important point after buying a device Hoshizaki JWE-2400CUA-R-25B (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Hoshizaki JWE-2400CUA-R-25B yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Hoshizaki JWE-2400CUA-R-25B - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Hoshizaki JWE-2400CUA-R-25B you will learn all the available features of the product, as well as information on its operation. The information that you get Hoshizaki JWE-2400CUA-R-25B will certainly help you make a decision on the purchase.
If you already are a holder of Hoshizaki JWE-2400CUA-R-25B, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Hoshizaki JWE-2400CUA-R-25B.
However, one of the most important roles played by the user manual is to help in solving problems with Hoshizaki JWE-2400CUA-R-25B. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Hoshizaki JWE-2400CUA-R-25B along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
