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Bosch SHI 4302 Troubleshooting Tips

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FOR MODELS:
SHI
4302
4306
6802
6805
6806
SHU 3032
3035
3036
3302
3305
3306
3322
3326
3336
4302
4306
4312
4316
4322
4326
5302
5304
5305
5306
5307
5312
5314
5315
5316
5317
6802
6805
6806
9902
9905
9906
9912
9915
9916
9922
9925
9926
SHV
4303
4803
H
SHU/SHI/SHV Dishwasher

Troubleshooting Tips

For:
B
Effective May 18, 2001
BSH Home Appliances
5551 McFadden Avenue
Huntington Beach, California 92649
CL
B
1st Edition/Rev. 2

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  Summary of Contents for Bosch SHI 4302

  • Page 1: Troubleshooting Tips

    FOR MODELS: 4302 4306 SHU/SHI/SHV Dishwasher 6802 6805 6806 Troubleshooting Tips SHU 3032 3035 3036 For: 3302 3305 3306 3322 3326 3336 Effective May 18, 2001 1st Edition/Rev. 2 4302 4306 4312 4316 4322 4326 5302 5304 5305 5306 5307 5312 5314 5315...
  • Page 3: Table Of Contents

    Page 1 TABLE OF CONTENTS Measuring resistances from the front of SHU/SHI 43/53/68 dishwashers…… A-1 Measuring resistances from the front of SHU 99 & SHV 43/48 dishwashers.. A-2 Measuring resistances from the front of SHU 33 dishwashers…..…………. A-3 Measuring resistances from the front of SHU 303x dishwashers.……………. A-4 Installing jumper for control modules for SHU 53x dishwashers.……………..A-5 Using the test program to troubleshoot the heater, flow switch and Hi-Limit thermostat from the front of SHI/U 43/53/68 dishwashers……….……………...B-1...
  • Page 4: Measuring Resistances From The Front Of Shu/Shi 43/53/68 Dishwashers

    Page A-1 Measuring resistances from the front of SHU/SHI 43/53/68 dishwashers Control Module -- I2 4 3 2 (SHU/I 43/53) measure measure measure rinse top rack (~ 55 kW @ measure agent sensor only 72ºF ) dispenser (SHU/I 53/68) actuator actuator (~.4 W) (SHU/I 68--...
  • Page 5: Measuring Resistances From The Front Of Shu 99 & Shv 43/48 Dishwashers

    Page A-2 Measuring resistances from the front of SHU 99 & SHV 43/48 dishwashers Control Module -- I2 measure dispenser actuator measure (~2150 W) rinse agent measure sensor measure circulation (SHV 48) motor (with (~.4 W) (~ 55 kW door closed) @ 72ºF) (~10 W) measure...
  • Page 6: Measuring Resistances From The Front Of Shu 33 Dishwashers

    Page A-3 Measuring resistances from the front of SHU 33 dishwashers Control Module -- I2 measure dispenser actuator (~2150 W) measure water measure level switch (open circuit) (~ 55 kW @ 72ºF) measure drain to neutral motor measure (~16.5 W) circulation motor (~10 W)
  • Page 7: Measuring Resistances From The Front Of Shu 303X Dishwashers

    Page A-4 Measuring resistances from the front of SHU 303x dishwashers Timer -- u to thermostats f3 & f4 to water level switch & inlet valve to float switch to flow switch to flow switch to hot line Timer motor m1 to neutral measure measure...
  • Page 8 Page A-5 Installing jumper for control modules for SHU/I 53 series dishwashers Control Module Part # 266746 4 3 2 NOTE: Remove existing jumper from old SHU/I 53 control module and install onto new module. This part # 266746 control module is used for all SHU/I 53 series & SHU/I 68 series dishwashers.
  • Page 9: Using The Test Program To Troubleshoot The Heater, Flow Switch And Hi-Limit Thermostat From The Front Of Shi/U 43/53/68 Dishwashers

    Page B-1 Using the test program to troubleshoot the heater, flow switch and Hi-Limit thermostat from the front of SHU/I 43/53/68 dishwashers TEST TIME NOTES On/Off Entering test program ----- Press button at the same time you Power Scrub Plus Regular press both the &...
  • Page 10 Page B-2 K e y f u n c t i o n a l p a r t s c h a n g e s f o r S H U /S H V /S H I d i s h w a s h e r s f o r “ s o f t e r b e a r i n g ” i n d e x U C /1 1 Key SHU/SHV/SHI dishwasher parts have been changed for the “softer bearing”...
  • Page 11 SHI 6802/6805/6806 UC/11 - UC/12. 263832 -- SHU 5302/5304/5305/5306/5312/5314/5315/5316/6802/6805/6806 UC 06 and SHI 6802/6805/6806 UC/06. 264461 -- SHU 4302/4306/4312/4316 UC 06 - UC/11 - UC/12 and SHI 4302/4306 UC/06 - UC/11 - UC/12. 1st Edition/Revision 3 Wednesday, May 9, 2001...
  • Page 12 Service Bulletin Page B-4 Soldering # 266746, 263832 or 264461 Control Modules for SHU/I 43/53/68 & GM 915-710 Dishwashers (excepting SHU 4322/4326) Occasionally, a heater relay terminal soldered to a # 266746, 263832 or 264461 control module pc board can burn. Heater relays can be resoldered to save customers time and money.
  • Page 13 Page C-1 SHU/SHI/SHV Dishwasher Quick Check Chart Use this chart to quickly identify problems from front of dishwasher without removing it. For a complete troubleshooting chart when symptoms are known, please refer to the SHU/SHI/SHV Dishwasher Troubleshooting Chart. Use a multimeter with temperature, voltage/resistance and current (ampere) probes. NOTE: Do all resistance checks with power turned off.
  • Page 14 Page C-2 SHU/SHI/SHV Dishwasher Quick Check Chart To check Measure If yes If no ü ü ü ü Current through hot ü ü ü ü Heater/flow switch/Hi- Test each part, turn off ü ü ü ü Heater flow ü ü ü ü wire into dishwasher –...
  • Page 15 Page C-3 SHU/SHI/SHV Dishwasher Quick Check Chart To check Measure If yes If no ü ü ü ü Float switch HINT: Any debris (e.g. a HINT: Must pull out (cont.). cable tie) in dishwasher base dishwasher and remove left can move under float and turn side panel to access float on float switch.
  • Page 16 Page C-4 SHU/SHI/SHV Dishwasher Quick Check Chart To check Measure If yes If no ü ü ü ü Control ü ü ü ü Run test program ü ü ü ü Module may be OK – ü ü ü ü Go to troubleshooting module (SHU/I models) and more testing may be...
  • Page 17 Page C-5 SHU/SHI/SHV Dishwasher Quick Check Chart To cancel/drain dishwasher while it's cycling, press and hold the following NOTE: buttons (until dishwasher starts to drain): Press and hold "Regular Wash" & "Power SHU/I 43-- & SHV 43/48 Scrub Plus" buttons Press hold "Scrub...
  • Page 18: Circulation Pump

    Page D-1 SHU/SHI/SHV Dishwasher Troubleshooting Chart NOTE: For minor problems from improper usage or lack of maintenance, please refer customer to the Self-Help chart in their Use and Care Manual. Problem Possible Cause Suggested Action ü ü ü ü Inappropriate dishwasher ü...
  • Page 19 Page D-2 SHU/SHI/SHV Dishwasher Troubleshooting Chart Problem Possible Cause Suggested Action ü ü ü ü Washability HINT: Must pull out dishwasher and HINT: One "wax" motor operates both the problems remove left side panel to access float detergent and rinse aid dispensers through a (dishwasher switch.
  • Page 20 Page D-3 SHU/SHI/SHV Dishwasher Troubleshooting Chart Problem Possible Cause Suggested Action ü ü ü ü Water in dishwasher base ü ü ü ü Turn off dishwasher, drain water ü ü ü ü Dishwasher from leaky or loose hose. manually from dishwasher base and won't stop filling reinstall or replace hose.
  • Page 21 Page D-4 SHU/SHI/SHV Dishwasher Troubleshooting Chart Problem Possible Cause Suggested Action ü ü ü ü Customer water supply ü ü ü ü Reconnect and turn on customer water ü ü ü ü Water won't fill. turned off or disconnected. supply. ü...
  • Page 22 Page D-5 SHU/SHI/SHV Dishwasher Troubleshooting Chart Problem Possible Cause Suggested Action ü ü ü ü Heater (r 1) failed. ü ü ü ü Run test program (SHU/I 43/53/68 ü ü ü ü Water doesn’t models – see page B-1) – measure heat up properly (cont.).
  • Page 23 Page D-6 SHU/SHI/SHV Dishwasher Troubleshooting Chart You will need a T20 Torx screwdriver and may need #1/ #2 flat blade screwdrivers NOTE: and a pair of needlenose pliers. Many parts can be snapped out without using tools. Symbols for parts (e.g. " f3" or refer to schematic diagram #36 on page E-1 "...
  • Page 24 Page D-7 SHU/SHI/SHV Dishwasher Troubleshooting Chart The customer hot water supply should meet or exceed the minimum requirements NOTE: below for the dishwasher to operate efficiently. Installations not meeting these requirements should be reinstalled according to local codes. 20-60 psi (1.4 - 4.1 bars) water pressure •...
  • Page 25 Page E–1 DIAGRAM #36 1 739 911 198...
  • Page 26 Page E–2 DIAGRAM #48...
  • Page 27: Shu 43/53/68 Dishwasher Test Programs

    Page F-1A SHI/U 43/53/68 Dishwasher Test Programs TEST* TIME NOTES Draining 30 seconds Aqua Sensor 65 seconds Not on SHI/U 43-- models Calibration ("Sensotronic") Filling Until Water Level Switch (f1) closes Can't skip this test º º Heating & Circulating Until water temperature reaches 150 F (65 Dispenser actuator comes on...
  • Page 28 Page F-1B SHI/U 43/53/68 Dishwasher Test Programs TEST* TIME NOTES Draining 30 seconds Aqua Sensor 65 seconds Not on SHI/U 43-- models Calibration ("Sensotronic") Filling Until Water Level Switch (f1) closes Can't skip this test º º Heating & Circulating Until water temperature reaches 150 F (65 Dispenser actuator comes on...
  • Page 29 Page F-1C SHI/U 43/53/68 Dishwasher Test Programs TEST* TIME NOTES Draining 30 seconds Aqua Sensor 65 seconds Not on SHI/U 43-- models Calibration ("Sensotronic") Filling Until Water Level Switch (f1) closes Can't skip this test º º Heating & Circulating Until water temperature reaches 150 F (65 Dispenser actuator comes on...
  • Page 30 Page F-1D SHI/U 43/53/68 Dishwasher Test Programs TEST* TIME NOTES Draining 30 seconds Aqua Sensor 65 seconds Not on SHI/U 43-- models Calibration ("Sensotronic") Filling Until Water Level Switch (f1) closes Can't skip this test º º Heating & Circulating Until water temperature reaches 150 F (65 Dispenser actuator comes on...
  • Page 31: Shv 43/48 Dishwasher Test Program

    Page F-2 SHV 43/48 Dishwasher Test Program TEST* TIME NOTES Draining 30 seconds Filling Until Water Level Switch (f1) closes Input current < 1 A Heating & Circulating Until water temperature reaches Input current ~ 11 A and º º (water circulates before unit stops filling) F (65 dispenser actuator comes on...
  • Page 32: Shu 99 Dishwasher Test Programs

    Page F-3A SHU 99 Dishwasher Test Program TEST* TIME NOTES Draining 30 seconds Filling Until Water Level Switch (f1) closes Input current < 1 A Heating & Circulating Until water temperature reaches Input current ~ 11 A and º º (water circulates before unit stops filling) F (65 dispenser actuator comes on...
  • Page 33 Page F-3B SHU 99 Dishwasher Test Program TEST* TIME NOTES Draining 30 seconds Filling Until Water Level Switch (f1) closes Input current < 1 A Heating & Circulating Until water temperature reaches Input current ~ 11 A and º º (water circulates before unit stops filling) F (65 dispenser actuator comes on...
  • Page 34 Page F-3C SHU 99 Dishwasher Test Program TEST* TIME NOTES Draining 30 seconds Filling Until Water Level Switch (f1) closes Input current < 1 A Heating & Circulating Until water temperature reaches Input current ~ 11 A and º º (water circulates before unit stops filling) F (65 dispenser actuator comes on...
  • Page 35 Page F-3D SHU 99 Dishwasher Test Program TEST* TIME NOTES Draining 30 seconds Filling Until Water Level Switch (f1) closes Input current < 1 A Heating & Circulating Until water temperature reaches Input current ~ 11 A and º º (water circulates before unit stops filling) F (65 dispenser actuator comes on...
  • Page 36: Shu 33 Dishwasher Test Program

    Page F-4 SHU 33 Dishwasher Test Program TEST* TIME NOTES Draining 30 seconds Filling Until Water Level Switch (f1) closes Input current < 1 A Heating & Circulating Until water temperature reaches Input current ~ 11 A and º º (water circulates before unit stops filling) F (65 dispenser actuator comes on...
  • Page 37: Using Dishwasher Serial Number To Find Date Of Manufacture

    Page G-1 Using Dishwasher Serial Number to find Date of Manufacture The dishwasher serial number can be used to check if the dishwasher is covered under warranty and to check for product changes. Best way to confirm warranty status is to have customer show paperwork with NOTE: installation date.
  • Page 38: Dishwasher Notes

    Page H-1 DISHWASHER NOTES Edition/Revision 0-A Tuesday, May 11, 1999...