Hoshizaki JWE-2400CUA-L-25B User manual

SERVICE MANUAL
HOSHIZAKI
DISHWASHER
JWE-2400CUA-L-25B
JWE-2400CUA-R-25B
NO. J002-794
ISSUED: APR. 1, 2011
REVISED: SEP. 6, 2011
MODEL

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, GA30269
Attn: Hoshizaki Technical Support Department
Phone: [phone] Technical Support
[phone]
Fax: [phone]
[phone]
E-mail: [email protected]
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 booklet
carefully as they give important information regarding safety. Please retain this
booklet for any further reference that may be necessary.
CONTENTS
I. Specifications ------------------------------------------------------------------------------------------------ 1
A. Specification Sheet ------------------------------------------------------------------------------------- 1
1. JWE-2400CUA-L-25B ------------------------------------------------------------------------------ 1
2. JWE-2400CUA-R-25B------------------------------------------------------------------------------ 2
B. Nameplate Rating--------------------------------------------------------------------------------------- 3
C. Dimensions/Connections------------------------------------------------------------------------------ 4
1. JWE-2400CUA-L-25B ------------------------------------------------------------------------------ 4
2. JWE-2400CUA-R-25B------------------------------------------------------------------------------ 5
II. General Information---------------------------------------------------------------------------------------- 6
A. Construction---------------------------------------------------------------------------------------------- 6
1. Dishwasher-------------------------------------------------------------------------------------------- 6
2. Booster Tank ------------------------------------------------------------------------------------------ 7
3. Control Box-------------------------------------------------------------------------------------------- 8
B. Functions-------------------------------------------------------------------------------------------------- 9
1. Increasing Rinse Water Flow Rate -------------------------------------------------------------- 9
C. Sequence of Operation-------------------------------------------------------------------------------- 9
1. Auto Fill Cycle----------------------------------------------------------------------------------------- 9
2. Ready Cycle (Unit Inactive) ----------------------------------------------------------------------10
3. Wash Cycle/Rinse Cycle--------------------------------------------------------------------------10
4. Table Limit Switch-----------------------------------------------------------------------------------11
5. Emergency Stop Button---------------------------------------------------------------------------11
6. Drain----------------------------------------------------------------------------------------------------11
D. Sequence of Operation Flow Chart----------------------------------------------------------------12
E. Timing Chart---------------------------------------------------------------------------------------------13
1. Auto Fill Cycle----------------------------------------------------------------------------------------13
2. Wash Cycle/Rinse Cycle--------------------------------------------------------------------------14
F. Control Board and Operation Board ---------------------------------------------------------------15
1. Control Board Location----------------------------------------------------------------------------15
2. Control Board Layout ------------------------------------------------------------------------------16
3. Control Board Diagram----------------------------------------------------------------------------17
4. Operation Panel Layout---------------------------------------------------------------------------18
5. Features-----------------------------------------------------------------------------------------------18
6. Controls, Adjustments, and Lamps-------------------------------------------------------------18
7. Service Menu and Error Log---------------------------------------------------------------------19
8. Temperature Display -------------------------------------------------------------------------------21
9. Error Codes ------------------------------------------------------------------------------------------21
10. Buzzer -------------------------------------------------------------------------------------------------21
11. Operation Time Display----------------------------------------------------------------------------22
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12. Special Modes---------------------------------------------------------------------------------------22
III. Service Diagnosis ----------------------------------------------------------------------------------------24
A. Diagnostic Procedure ---------------------------------------------------------------------------------24
B. Error Codes----------------------------------------------------------------------------------------------26
1. Error Code Table------------------------------------------------------------------------------------26
2. Error Code Log--------------------------------------------------------------------------------------27
3. Error Code Details----------------------------------------------------------------------------------28
C. Service Flow Charts-----------------------------------------------------------------------------------41
1. Unit Will Not Start-----------------------------------------------------------------------------------41
2. Dishes Not Clean -----------------------------------------------------------------------------------43
3. Inadequate Rinse-----------------------------------------------------------------------------------45
4. Dishwasher Will Not Start Wash/Rinse Cycle -----------------------------------------------46
5. No or Inadequate Detergent/Rinse Aid Supply----------------------------------------------47
6. Wash Tank Water Boils----------------------------------------------------------------------------47
7. Wash Tank Water Not Draining------------------------------------------------------------------48
D. Float Switch Check and Cleaning------------------------------------------------------------------49
1. Float Switch Check---------------------------------------------------------------------------------49
2. Float Switch Cleaning------------------------------------------------------------------------------49
E. Thermistor Check --------------------------------------------------------------------------------------50
IV. Removal and Replacement of Components-------------------------------------------------------51
A. Removal of Panels-------------------------------------------------------------------------------------51
B. Removal and Replacement of Wash Pump Motors -------------------------------------------51
C. Removal and Replacement of Rinse Pump Motor---------------------------------------------52
D. Removal and Replacement of Gear Motor ------------------------------------------------------55
E. Removal and Replacement of Conveyor---------------------------------------------------------56
F. Removal and Replacement of Crankshaft--------------------------------------------------------57
G. Removal and Replacement of Control Box------------------------------------------------------58
H. Removal and Replacement of Thermistor-------------------------------------------------------58
I. Removal and Replacement of Control Board or Operation Board--------------------------59
1. Control Board----------------------------------------------------------------------------------------59
2. Operation Board-------------------------------------------------------------------------------------60
J. Removal and Replacement of Heater-------------------------------------------------------------61
K. Removal and Replacement of Float Switch -----------------------------------------------------62
L. Removal and Replacement of Thermostat-------------------------------------------------------63
V. Cleaning and Maintenance Instructions -------------------------------------------------------------64
A. Daily Maintenance -------------------------------------------------------------------------------------64
B. Weekly Maintenance----------------------------------------------------------------------------------69
1. Heater--------------------------------------------------------------------------------------------------69
2. Exterior ------------------------------------------------------------------------------------------------69
C. Monthly Maintenance ---------------------------------------------------------------------------------69
1. Water Supply Line ----------------------------------------------------------------------------------69
D. Descaling (As Required) -----------------------------------------------------------------------------70
E. Shutdown-------------------------------------------------------------------------------------------------70
F. Long Storage, Relocation, Disposal, Transfer---------------------------------------------------72
VI. Operating Instructions-----------------------------------------------------------------------------------72
VII. Technical Information-----------------------------------------------------------------------------------73
A. Water Circuit---------------------------------------------------------------------------------------------73
B. Wiring Diagram -----------------------------------------------------------------------------------------74
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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.
WARNING Indicates a hazardous situation which could result in death or
serious injury.
NOTICE Indicates a situation which could result in damage to the unit or
property.
IMPORTANT Indicates important information about the use and care of the
unit. 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 death, 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 independent power supplies for the dishwasher and for the
booster tank. See the nameplate for proper voltage and breaker/fuse sizes.
Failure to use proper breakers or fuses can result in tripped breakers, blown
fuses, 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.
• Use the “ON/OFF” button on the operation panel to turn off the unit, then turn
off the dishwasher and booster tank power supplies before servicing. Lockout/
Tagout to prevent the power supplies from being turned back on inadvertently.
• Do 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 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.
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