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Bosch SHI4302 Manual

Bosch dishwashers manual
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BOSCH DISHWASHERS
SHI4302/4306/66A05/6802/6805/6806
SHU3002/3006/3012/3016
SHU3026/3032/3035/3036
SHU33A02/06, 3302/3305/3306/3307
SHU3322/3326/3336, 4322/4326
SHU4002/4006/4016/4022/4026/4036
SHU43C02/05/06/07, 43E02/05/06/07
SHU4302/4304/4306/4312/4314/4316
SHU53A02/05/06, 53E02/05/06
SHU5302/5304/5305/5306/5307
SHU5312/5314/5315/5316/5317
SHU66C02/05/06/07, 66E02/05/06/07
SHU6802/6805/6806
SHU8802/8805/8806/8812/8815/8816
SHU9902/9905/9906
SHU9912/9915/9916/9922/9925/9926
SHU9952/9955/9956
SHV4303/46C03/4803/66A03/6803/99A03
SHX33A02/05/06, 43E02/05/06
SHX46A02/05/06/07, 46B02/05/06/07
SHX56B02/05/06, 99B05/06
SHY56A02/05/06, 66C02/05/06, 99A02/05/06
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  Summary of Contents for Bosch SHI4302

  • Page 1 BOSCH DISHWASHERS SHI4302/4306/66A05/6802/6805/6806 SHU3002/3006/3012/3016 SHU3026/3032/3035/3036 SHU33A02/06, 3302/3305/3306/3307 SHU3322/3326/3336, 4322/4326 SHU4002/4006/4016/4022/4026/4036 SHU43C02/05/06/07, 43E02/05/06/07 SHU4302/4304/4306/4312/4314/4316 SHU53A02/05/06, 53E02/05/06 SHU5302/5304/5305/5306/5307 SHU5312/5314/5315/5316/5317 SHU66C02/05/06/07, 66E02/05/06/07 SHU6802/6805/6806 SHU8802/8805/8806/8812/8815/8816 SHU9902/9905/9906 SHU9912/9915/9916/9922/9925/9926 SHU9952/9955/9956 SHV4303/46C03/4803/66A03/6803/99A03 SHX33A02/05/06, 43E02/05/06 SHX46A02/05/06/07, 46B02/05/06/07 SHX56B02/05/06, 99B05/06 SHY56A02/05/06, 66C02/05/06, 99A02/05/06...
  • Page 3: Table Of Contents

    Table of Contents Table of Contents Safety Concerns………………………..……….…..…………... 2 Product Line Related…………………………………..……….. 2 III. Product Specific………………………………………………… 3 Installation Issues…………………….………………..…….…. 6 Theory of Operation…………………………………..………. 22 Component Access/Replacement………………..………… 31 VII. Component Testing/Test Procedures……………..………. 59 VIII. Troubleshooting…………………………………….………… 62 Wiring Diagrams/Tech Sheet…………………….………….. 96...
  • Page 4: Safety Concerns

    I. Safety Concerns I. Safety Concerns IA. Safety Symbol Explanation m = Warning symbol included in Installation Instructions and on this page. It includes serious warnings such as injury or death, electric shock & dishwasher damage. IB. Identify Potential Hazards There are few hazards associated with dishwashers.
  • Page 5: Product Specific

    III. Product Specific III. Product Specific IIIA. Product Specification Chart Rated 120V, 60 Hz, 15A, 1450W (max.). Maximum amp draw when heaters running ~ 11A. Water connection 3/8” NPT female. Inlet water pressure range 5 - 120 psi (0.3 – 8.27 bars). Circulation pump motor rated 120V, 60 Hz, 160W, insulation class A.
  • Page 6 III. Product Specific III. Product Specific IIIC. Model Number Location Located on right edge of inner door. See below. The serial label is fastened to the right edge of the inner door. Understanding FD Serial # FD8303 00011 (used for warranty) The FD # shows the Fabrication Date •...
  • Page 7 Lifetime Limited Warranty Against Stainless Steel Rust-Through Bosch will replace your dishwasher, free of charge, with the same model or a current model that is equivalent or better in functionality if the inner liner should rust through under conditions of normal home use, labor charges excluded.
  • Page 8: Installation Issues

    IV. Installation Issues IV. Installation Issues IVA. Location Requirements See attached installation instructions. IVB. Electrical Requirements See attached installation instructions. IVC. Water/Drain Requirements See attached installation instructions. IVD. Shipping/Packaging Removal See attached installation instructions. IVE. Installation Related Process See attached installation instructions. Leveling cabinet –...
  • Page 9 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 10 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 11 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 12 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 13 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 14 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 15 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 16 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 17 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 18 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 19 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 20 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 21 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 22 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 23 IV. Installation Issues: Installation Instructions IV. Installation Issues: Installation Instructions...
  • Page 24: Product View

    Flow-through heaters prevent dishware damage from exposed elements and allow water to be continuously filtered and heated. Bosch flow-through heaters heat water by two degrees (ºF) per minute. All heaters are protected by a 185ºF Hi-limit (high temperature cutout) and by a flow switch which prevents heaters from operating when no water is flowing.
  • Page 25 V. Theory of Operation VA. Description of Operation/Cycle (continued) Bosch dishwashers continuously filter all water using a triple filter method. A filter screen above the sump filters out larger particles. A two-stage microfilter in the sump filters out finer particles. This microfilter can easily be removed by customers for cleaning and should be cleaned regularly.
  • Page 26 V. Theory of Operation V. Theory of Operation VA. Description of Operation/Cycle (continued) Bosch dishwashers fill with water as shown below. Normal fill: Water rises to proper level, pushing air in pressure chamber which operates diaphragm. Overfill: Water rises too high &...
  • Page 27 (I.e. the drain pump isn’t a base bilge pump). Condensation drying – This feature saves energy and enables Bosch dishwashers to have Tall Tubs – the tallest tubs in the industry, allowing full-sized plate to be placed in both upper and lower racks.
  • Page 28 V. Theory of Operation V. Theory of Operation Dispensers Dispensers During each wash program, the wax motor opens twice -- once to dispense detergent and again to dispense rinse-aid. The wax motor opens the same way -- the linkages make the separate compartments open.
  • Page 29 V. Theory of Operation V. Theory of Operation Top Rack Only Top Rack Only Models with the Top Rack Only feature have separate actuators mounted underneath heater assemblies. The actuator moves a magnetic plunger in the lower rack heater port, diverting water to the top rack. Plunger Heater with top rack actuator Both racks...
  • Page 30 V. Theory of Operation V. Theory of Operation Door Latches Door Latches SHU & SHI dishwashers have door latches linked mechanically to door switches. All other dishwashers (SHV, SHX & SHY) use electronic door switches (microswitches activated by door latches). 187184 ball bearing door latch with microswitch 419827 door latch for SHI/SHU...
  • Page 31 V. Theory of Operation V. Theory of Operation Aqua Sensors Aqua Sensors The aqua sensor only affects energy usage, eliminating a pre-wash and/or pre-rinse cycle if water is clean. Most customers won’t notice the difference if an aqua sensor fails. Aqua sensors NOTE: provide ~ 20% energy...
  • Page 32 V. Theory of Operation V. Theory of Operation Water Fill Assemblies Water Fill Assemblies Water fill assemblies insure dishwashers fill properly at various incoming pressures. Diaphragm Water fill switch Switch lever Float switch Float Newer water fill assembly without gasket Older water fill NOTE: assemblies...
  • Page 33: Component Access/Replacement

    Component Access/Replacement Component Access/Replacement Water Valves (1) Water Valves (1) The water valve is accessed from the front of the dishwasher base by removing the toe kick. To remove water valve: Remove two (2) T-20 Torx screws from toe kick and tilt toe kick out from under dishwasher.
  • Page 34 Component Access/Replacement Component Access/Replacement Water Valves (2) Water Valves (2) 580009 167081 189533 NOTE: Water valves have been upgraded several times since 1st 1/4 of 1999. All valves with upgraded solenoids have yellow solenoid stems. All old valves have white solenoid stems.
  • Page 35 Component Access/Replacement Component Access/Replacement Circulation Pumps Access (1) Circulation Pumps Access (1) The circulation pump & capacitor are accessed from the right side of the dishwasher by removing the right side panel and blocking the tank. To remove outer door: Remove six T-20 Torx inner door screws below fascia panel -- three per side (1).
  • Page 36 Component Access/Replacement Component Access/Replacement Circulation Pumps Access (2) Circulation Pumps Access (2) To remove toe kick To remove toe kick Remove two T-20 Torx screws from toe kick (1). Tilt kick from under dishwasher (2). To remove right & left side panels To remove right &...
  • Page 37 Component Access/Replacement Component Access/Replacement Circulation Pumps Access (3) Circulation Pumps Access (3) To raise right side of tank for circulation pump access To raise right side of tank for circulation pump access Remove one T-20 Torx screw from both rear corners holding tank to base (1) -- removing screw from both sides allows tank to be blocked upward.
  • Page 38 Component Access/Replacement Component Access/Replacement Circulation Pumps Disassembly Circulation Pumps Disassembly To remove motor to access impeller or change complete pump To remove motor to access impeller or change complete pump Disconnect wire harness from motor after carefully noting connections (1). For UC/11 &...
  • Page 39 Component Access/Replacement Component Access/Replacement Circulation Pumps Reassembly Circulation Pumps Reassembly To remove & install impeller (using kit # 167085) To remove & install impeller (using kit # 167085) While holding motor fan so shaft won’t spin (1a), unscrew impeller counterclockwise (1b). Rotate pump housing counterclockwise until tabs clear, then lift housing from motor (2).
  • Page 40 Component Access/Replacement Component Access/Replacement Control Modules Disassembly (1) Control Modules Disassembly (1) Control modules are easily removed from fascia panels by bending console tabs. (SHU 9922 shown) Remove fascia panel by removing T-20 Torx inner door screws. Disconnect wire harnesses from module after noting connector locations.
  • Page 41 Component Access/Replacement Component Access/Replacement Control Modules Disassembly (2) Control Modules Disassembly (2) SHY56A/66C, SHU 995x & SHV 68 control modules are different than other models and are removed differently. Remove fascia panel by removing six (6)T-20 (SHU 995x shown) Torx inner door screws. Disconnect wire harnesses from module after noting connector locations.
  • Page 42 Component Access/Replacement Component Access/Replacement Control Modules SHY56A/66C Control Modules with Displays Control Modules SHY56A/66C Control Modules with Displays control modules have separate display SHY56A/66C modules mounted on the front of fascia panels. To remove/install display module: Remove outer door & fascia panel. Confirm the (4) pushbutton carrier display latches are intact.
  • Page 43 Component Access/Replacement Component Access/Replacement Control Modules – Apexx Control Module Disassembly (1) Control Modules – Apexx Control Module Disassembly (1) (SHV99A/SHX99B/SHY99A) control Apexx modules are different than other models and are removed differently. Modules are mounted on the base (where base wiring connectors were), not behind fascia panels.
  • Page 44 Component Access/Replacement Component Access/Replacement Control Modules – Apexx Control Module Disassembly (2) Control Modules – Apexx Control Module Disassembly (2) To remove right & left side panels (where necessary) Remove two T-20 Torx side panel screws through holes in left & right trim strips (1).
  • Page 45 Component Access/Replacement Component Access/Replacement Control Modules – Apexx Control Module Disassembly (3) Control Modules – Apexx Control Module Disassembly (3) To raise right side of tank for Apexx module access (where necessary) Remove one T-20 Torx screw from both rear corners holding tank to base (1) -- removing screw from both sides allows tank to be blocked upward.
  • Page 46 Component Access/Replacement Component Access/Replacement Control Modules – Apexx Control Module Disassembly (4) Control Modules – Apexx Control Module Disassembly (4) Locating module in base Opening module cover Disconnecting module terminals Pushing back module latch Note latch Sliding module out Align module tabs when reassembling HINT: Apexx control modules cannot be checked or have resistances measured from the front of dishwashers.
  • Page 47 Component Access/Replacement Component Access/Replacement Control Modules – Apexx Display Module Disassembly Control Modules – Apexx Display Module Disassembly Apexx (SHV99A/SHX99B/SHY99A) display modules are mounted on fascia panels (where control modules are mounted on other models). These instructions apply to SHV/SHX/SHY99A models. front Removing wire harness Removing...
  • Page 48 Component Access/Replacement Component Access/Replacement Heater s & NTC’s – Access (1) Heater s & NTC’s – Access (1) The heater & NTC can be accessed or measured from the right side of the dishwasher, but can only be removed by dropping the entire base (by flipping the dishwasher on its back) since they are wedged underneath the tank.
  • Page 49 Component Access/Replacement Component Access/Replacement Heaters & NTC’s – Access (2) Heaters & NTC’s – Access (2) To remove toe kick: Remove two (2) T-20 Torx screws from toe kick. Tilt toe kick out from under dishwasher. HINT: The fascia panel and door don’t need to be removed to access the heater &...
  • Page 50 Component Access/Replacement Component Access/Replacement Heaters & NTC’s – Access (3) Heaters & NTC’s – Access (3) To separate base from tank (1): Carefully lay dishwasher on its back. Carefully pull door springs out from base. Remove terminal blocks from base. Separate water valve from base by removing two (2) T-20 Torx screws, then move water valve out of the way.
  • Page 51 Component Access/Replacement Component Access/Replacement Heaters & NTC’s – Access (4) Heaters & NTC’s – Access (4) To separate base from tank (2): Disconnect J-box ground wire, then pull wires out of J-box. Pull out inlet hose from sump. Carefully pull base away from tank and sump.
  • Page 52 Component Access/Replacement Component Access/Replacement Heaters & NTC’s – Removal & Installation (1) Heaters & NTC’s – Removal & Installation (1) Removing & Installing Heater & NTC: Remove two (2) T-20 Torx screws holding heater assembly to sump. Disconnect wires from heater, flow switch, NTC &...
  • Page 53 Component Access/Replacement Component Access/Replacement Heaters & NTC’s – Removal & Installation (1) Heaters & NTC’s – Removal & Installation (1) Removing & Installing NTC: Remove heater assembly -- NTC is located on top of heater assembly. Disconnect wires after noting connections (since NTC &...
  • Page 54 Component Access/Replacement Component Access/Replacement Drain Pumps – Removal & Installation Drain Pumps – Removal & Installation Drain pumps are mounted to sumps in the front of dishwashers -- they’re easily accessible from the front of dishwashers by removing toe kicks. Removing &...
  • Page 55 Component Access/Replacement Component Access/Replacement Dispensers – Removal & Installation (1) Dispensers – Removal & Installation (1) To remove/install dispensers: Remove outer door, remove fascia panel & disconnect wire harness from fascia panel. Disconnect wire harness from above dispenser, then remove wires to wax motor &...
  • Page 56 Component Access/Replacement Component Access/Replacement Dispensers – Removal & Installation (2) Dispensers – Removal & Installation (2) For UC/12 and later dishwashers, condensation tubes were moved (from dispensers) to the right side of tanks. This required a change from vented dispensers to unvented dispensers.
  • Page 57 Component Access/Replacement Component Access/Replacement Door Latches – Removal & Installation (1) Door Latches – Removal & Installation (1) Usually the only door latch repairs will be replacing microswitches on fully integrated models (e.g. SHV, SHU 88/99). To disassemble door latches for integrated models: Remove T-20 Torx fascia panel screws from inner door.
  • Page 58 Component Access/Replacement Component Access/Replacement Door Latches – Removal & Installation (2) Door Latches – Removal & Installation (2) To remove & install door latches for integrated models (continued): Remove door latch from console. Disconnect wire harness, then remove microswitch & cover. Disconnect wires, then remove microswitch from cover.
  • Page 59 Component Access/Replacement Component Access/Replacement Aqua Sensors Aqua Sensors The aqua sensor is located on the rear of the sump. It can be reached through the left side of the dishwasher (after the left side panel is removed). Its not necessary to block up the tank to reach the aqua sensor.
  • Page 60 Component Access/Replacement Component Access/Replacement Water Fill Assemblies Water Fill Assemblies The water fill assembly is easily accessed from the left side by just removing the left side panel. HINT: Most water fill assembly repairs will involve replacing microswitches. Occasionally tank insulation or other debris can prevent the diaphragm switch lever from operating, allowing overfilling.
  • Page 61: Component Testing/Test Procedures

    VII. Component Testing/Test Procedures VII. Component Testing/Test Procedures Using Test Programs Using Test Programs Using test programs for various models (UC/06 - UC/14) Models Buttons to Enter Test Program Power Scrub Plus + Regular Wash SHU/SHI430x, SHU431x Power Scrub Plus + Rinse & Hold SHU33/DLX Regular Wash + Rinse &...
  • Page 62 VII. Component Testing/Test Procedures VII. Component Testing/Test Procedures (continued) (continued) Fault Codes Fault Codes DISHWASHER TEST PROGRAM ERROR CODES (on 2-digit digital displays): 0 – No faults 1 – Aqua Sensor (Sensotronic) fault 2 – Heating system fault (heater, Hi-Limit, flow switch, NTC, control module heater relay) 4 –...
  • Page 63 VII. Component Testing/Test Procedures VII. Component Testing/Test Procedures (continued) (continued) Using Test Programs to Measure Heater/NTC Resistances Using Test Programs to Measure Heater/NTC Resistances Because the flow HINT: switch only closes when water is flowing, the heater resistance can only be measured at the heater terminals (not at the control module).
  • Page 64: Troubleshooting

    VIII. Troubleshooting VIII. Troubleshooting Basic Dishwasher Troubleshooting Basic Dishwasher Troubleshooting Problem Possible Cause Suggested Action Inappropriate dishwasher Instruct customer to use a powdered Washability detergent used. dishwasher detergent (e.g. Cascade powder). problems (dishwasher won't clean properly) Blocked or clogged upper/ lower Check spray arms –...
  • Page 65 VIII. Troubleshooting VIII. Troubleshooting (continued) (continued) Problem Possible Cause Suggested Action Rinse aid not used. Instruct customer on using rinse aid – Dishes won't dry dishes won't dry without it. properly. Standing water in dishwasher Unclog air gap. Make sure top of drain Dishwasher has sump.
  • Page 66 VIII. Troubleshooting VIII. Troubleshooting (continued) (continued) Problem Possible Cause Suggested Action Water in dishwasher base from Turn off dishwasher, drain water manually Dishwasher won't leaky or loose hose. from dishwasher base and reinstall or replace stop filling or won't hose. stop draining.
  • Page 67 VIII. Troubleshooting VIII. Troubleshooting (continued) (continued) Problem Possible Cause Suggested Action Circulation motor (m2 ) failed. Turn off dishwasher and replace motor. Water doesn't Timer (SHU 30/40 models ) or Check voltage at and wiring to timer or circulate. module (all other models ) failed. module.
  • Page 68 VIII. Troubleshooting VIII. Troubleshooting (continued) (continued) The following parts can't be serviced from the front of the dishwasher (the NOTE: dishwasher must be pulled out and the tank removed or tilted/blocked up to replace them): •· Heater •· Circulation motor •·...
  • Page 69 VIII. Troubleshooting VIII. Troubleshooting Dishwasher Parts Issues Dishwasher Parts Issues Water valves…. Most damaged valves occur from being cracked by fittings being overtightened -- some valves are damaged from hard water or debris from customer pipes clogging them so they can’t close securely. A damaged valve can allow some water onto kitchen floors.
  • Page 70 VIII. Troubleshooting VIII. Troubleshooting Control Module Modules Displaying “1” Control Module Modules Displaying “1” Occasionally dishwashers will run for hours, not finish washing & show a “1” in the display. This means the module has timed out due to an unidentified heating problem -- all heating related parts must be checked until the problem is found.
  • Page 71 VIII. Troubleshooting VIII. Troubleshooting Heater Troubleshooting Flowchart Heater Troubleshooting Flowchart NOTE: Flow through heaters heat water ~ 2ºF / minute. Can also measure heater current @ module red heater wire (~ 9.5A). If ~ 1.5A, START heater circuit has With heater on failed.
  • Page 72 VIII. Troubleshooting VIII. Troubleshooting Water Leaking Past Doors Water Leaking Past Doors Water seldom leaks out of bottom of Make sure dishwasher doors. Usually it’s a condensation tubes aren’t customer installation issue. START connected to Occasionally temporary blockages of drains or air Water occasionally condensation tubes by air pockets gaps!
  • Page 73 VIII. Troubleshooting VIII. Troubleshooting Circulation Pump Checking PTC Pump Motor Starter (1) Circulation Pump Checking PTC Pump Motor Starter (1) The (PTC) circulation pump motor starter (# 182318) is used on SHX99B / SHV99A / SHY99A (“Apexx”), & SHX56B / SHV66A / SHY56A-66C (“ExactWash”) models with water switches.
  • Page 74 VIII. Troubleshooting VIII. Troubleshooting Circulation Pump Checking PTC Pump Motor Starter (2) Circulation Pump Checking PTC Pump Motor Starter (2) Resistance TECH TIPS: measurements: Between terminals 1 - 2 is ~ 7 Ω (one of the main run windings). Won’t help between 3 2 4...
  • Page 75 VIII. Troubleshooting VIII. Troubleshooting Circulation Pump Water Switch Pump Nuisance Tripping (1) Circulation Pump Water Switch Pump Nuisance Tripping (1) There have been some nuisance tripping of thermal motor protectors on three-winding circulation pumps for use with water switches (# 239129). To prevent nuisance tripping, use pumps with upgraded thermal protectors (# 437345).
  • Page 76 VIII. Troubleshooting VIII. Troubleshooting Circulation Pump Water Switch Pump Nuisance Tripping (2) Circulation Pump Water Switch Pump Nuisance Tripping (2) HINTS: Identifying new & original pumps & motor starters: • “New" circulation pump # 437345 – look for # “5600 060022” stamped on housing. •...
  • Page 77 VIII. Troubleshooting VIII. Troubleshooting Circulation Pump – Replacing Impellers (1) Circulation Pump – Replacing Impellers (1) Occasionally, a circulation pump impeller can stick if a dishwasher hasn’t been used for a long time. Impeller ceramic rings and carbon rings had been changed (during January, 2001) to reduce or eliminate impeller sticking (ceramic rings are located around shaft on rear of impeller).
  • Page 78 VIII. Troubleshooting VIII. Troubleshooting Circulation Pump – Replacing Impellers (2) Circulation Pump – Replacing Impellers (2) Occasionally, a circulation pump will jam when debris gets caught inside (when the sump filter wasn’t tightened down) or when a dishwasher hasn’t been used for months. Often circulation pumps are replaced when merely changing the impeller (kit # 167085, item # 24) will solve the problem.
  • Page 79 VIII. Troubleshooting VIII. Troubleshooting Circulation Pump – Replacing Impellers (3) Circulation Pump – Replacing Impellers (3) Replacement impellers will have a green tint compared to older impellers. The impeller ceramic ring should be pink or bright white. HINT: To remove an impeller, place a 8mm nut driver (or similar tool) on 8mm stud in center of...
  • Page 80 VIII. Troubleshooting VIII. Troubleshooting Circulation Pump – Service Index UC/06, UC/11 & UC/12 Parts Circulation Pump – Service Index UC/06, UC/11 & UC/12 Parts Changes Changes Softer bearing Part description Old part # Models used on Models used on part # 491434 (pum p) All models (index #’s...
  • Page 81 VIII. Troubleshooting VIII. Troubleshooting Circulation Pump – Service Index UC/14 Water Switch Parts Circulation Pump – Service Index UC/14 Water Switch Parts Changes Changes Water switch Part description Old part # Models used on Models used on part # 491434 (pum p) All models (index #’s All ExactWash &...
  • Page 82 VIII. Troubleshooting VIII. Troubleshooting Circulation Pump – Pump & Motor Part # Changes Circulation Pump – Pump & Motor Part # Changes The softer bearing (UC/07, UC/11 & UC/12 index) circulation pump and motor only part #’s for all & models have been changed to make parts ordering more consistent throughout the world.
  • Page 83 VIII. Troubleshooting VIII. Troubleshooting Control Module – Heater Relays Control Module – Heater Relays HINT: Occasionally, a heater relay HINT: Faulty heater terminal soldered to a # 266746, relays cause 263832 or 264461 control module pc modules to count down or have insufficient board can burn to “1”...
  • Page 84 VIII. Troubleshooting VIII. Troubleshooting Control Module – Using # 264946 Front Cover to Replace Control Module – Using # 264946 Front Cover to Replace Broken # 266746, # 263832 or # 264461 Control Module Buttons Broken # 266746, # 263832 or # 264461 Control Module Buttons # 266746, # 263832 or # 264461 control modules are often replaced when buttons break, not for electronic failures.
  • Page 85 VIII. Troubleshooting VIII. Troubleshooting Control Module – Using # 481055 Control Modules in Older Control Module – Using # 481055 Control Modules in Older SHU 99 and SHV 43/48 Dishwashers (1) SHU 99 and SHV 43/48 Dishwashers (1) Control module # 265401 used on older SHV 43/48 and SHU 990x/991x UC/06, UC/07 &...
  • Page 86 VIII. Troubleshooting VIII. Troubleshooting Control Module – Using # 481055 Control Modules in Older Control Module – Using # 481055 Control Modules in Older SHU 99 and SHV 43/48 Dishwashers (2) SHU 99 and SHV 43/48 Dishwashers (2) button pushbutton pad # 182600 used on SHV 48 button pushbutton pad # 182600 used on SHV 48 UC/06, UC/07, UC/11 &...
  • Page 87 VIII. Troubleshooting VIII. Troubleshooting Control Module – Using # 481055 Control Modules in Older Control Module – Using # 481055 Control Modules in Older SHU 99 and SHV 43/48 Dishwashers (3) SHU 99 and SHV 43/48 Dishwashers (3) Comparison of old and new pushbutton pads: SHV 4303 UC/06 &...
  • Page 88 VIII. Troubleshooting VIII. Troubleshooting Heater – Replacing Older UC/06 NLA Heaters Heater – Replacing Older UC/06 NLA Heaters Some heater assemblies for old index UC/06 models aren’t available -- # 264463 (for SHU 3000/4000 models) & # 269255 (for SHU 3030/3130 models). Similar heater assemblies for other index UC/06 models can be used when thermostats are installed, flow switches are replaced and...
  • Page 89 VIII. Troubleshooting VIII. Troubleshooting Heater – Water Switch (“Flow Control”) (1) Heater – Water Switch (“Flow Control”) (1) All Apexx (SH_99) and ExactWash (SHX/Y56 & SHV/Y66) model heater assemblies have motor operated water switches inside them, with motors attached where Top Rack Only housings have been traditionally mounted (underneath heater assemblies).
  • Page 90 VIII. Troubleshooting VIII. Troubleshooting Heater – Water Switch (“Flow Control”) (2) Heater – Water Switch (“Flow Control”) (2) Water switch Part description Old part # Models used on Models used on part # 491434 (pum p) All models (index #’s All ExactWash &...
  • Page 91 VIII. Troubleshooting VIII. Troubleshooting Drain Pump – Sump Improvements to aid Draining Drain Pump – Sump Improvements to aid Draining Two improvements have been made in sump parts during mid 2003 to improve draining. Drain pump performance can be optimized if these parts are replaced when drain pumps are replaced.
  • Page 92 VIII. Troubleshooting VIII. Troubleshooting Dispenser – Replacing Dispenser Doors Dispenser – Replacing Dispenser Doors Most dispenser problems occur from dispenser doors being damaged or pulled off (due to misuse). Please follow the instructions below when replacing doors. Connect spring to Door door &...
  • Page 93 VIII. Troubleshooting VIII. Troubleshooting Dispenser – Top Load Dispenser (1) Dispenser – Top Load Dispenser (1) Many high-end models (with digital displays) have top- load dispensers, enabling detergent and rinse-aid to be added while doors are partially open (preferably @ 45º). Rinse-aid dosage is shown on the digital display and is changed...
  • Page 94 VIII. Troubleshooting VIII. Troubleshooting Dispenser – Top Load Dispenser (2) Dispenser – Top Load Dispenser (2) Top-load dispensers measure rinse-aid levels, but not with removable reed switches as with traditional dispensers. The dispensing mechanism also operates differently from traditional dispensers. All top-load dispensers are unvented. Rinse-aid reservoir Detergent...
  • Page 95 VIII. Troubleshooting VIII. Troubleshooting Door Latch – Misaligned Latches Door Latch – Misaligned Latches Occasionally integrated dishwasher door latches can be misaligned, causing doors to not close properly or dishwashers to run with doors open (when latches don’t reset). Follow these steps to realign door latches. Fascia frame (console) Fascia frame (console)
  • Page 96 VIII. Troubleshooting VIII. Troubleshooting Door Latch – Miswired Latches Door Latch – Miswired Latches If replacement SHV46/66, SHX33/43/46 or SHY56/66 door latches/wire harnesses are miswired (with door latch terminals backwards), dishwashers run with doors open and lights won’t turn on when doors are open. Control modules can be irreversibly damaged.
  • Page 97 VIII. Troubleshooting VIII. Troubleshooting All Dishwashers – Terminal Box Covers All Dishwashers – Terminal Box Covers Since September, 2003, all dishwashers have included larger terminal boxes (junction boxes/J- boxes) with covers. New terminal boxes Old terminal boxes New box New box with cover with cover Conduit exit shown...
  • Page 98: Wiring Diagrams/Tech Sheet

    Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHU43C/53A Resistances @ Modules Measuring SHU43C/53A Resistances @ Modules Control Module – I2 Measure To Aqua Measure rinse-aid Sensor sensor (~ 55kΩ (~ .4Ω) @ 72ºF) To water fill val e Measure dispenser actuator To water level switch (~ 2150Ω)
  • Page 99 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHX33A/43E/46A/B, SHV46C Resistances @ Modules Measuring SHX33A/43E/46A/B, SHV46C Resistances @ Modules Control Module – I2 Not used on these models To Aqua Measure Sensor rinse-aid sensor (~ .4Ω) To heater, Hi-Limit & flow switch Measure Measure dispenser drain motor...
  • Page 100 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHU66C, SHI66A Resistances @ Modules Measuring SHU66C, SHI66A Resistances @ Modules Control Module – I2 display module To Aqua To water Sensor fill valve Measure NTC To water (~ 55kΩ @ level 72ºF) switch Resets control...
  • Page 101 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHX56B, SHV66A, SHY56/66 Resistances @ Modules Measuring SHX56B, SHV66A, SHY56/66 Resistances @ Modules Control Module – I2 To water switch display water module fill valve To Aqua Sensor To water level switch Measure To door switch To rinse- Hot line to water switch, water...
  • Page 102 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHV99, SHX99, SHY99 Resistances @ Modules Measuring SHV99, SHX99, SHY99 Resistances @ Modules Measure (~ 55kΩ Control Module – I2 @ 72ºF) To Aqua Sensor Hot line to water switch & float switch To water level .10-...
  • Page 103 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHU/SHI43/53/68 Resistances @ Modules Measuring SHU/SHI43/53/68 Resistances @ Modules Wire color codes: BK = Black BN = Brown BU = Blue GY = Gray RD = Red WH = White YE = Yellow...
  • Page 104 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHU995X, SHV68 Resistances @ Modules Measuring SHU995X, SHV68 Resistances @ Modules Control Module -- I2 Measure Top Rack Only Measure rinse actuator (SHV 68 only) agent sensor (~ .4 Ω) (~ .4 Ω) Measure Measure dispenser Circulation...
  • Page 105 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHU88/99 , SHV43/48 Resistances @ Modules Measuring SHU88/99 (not 995x) , SHV43/48 Resistances @ Modules (not 995x) Wire color codes: BK = Black BN = Brown BU = Blue GY = Gray RD = Red WH = White YE = Yellow...
  • Page 106 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHU33/432x Resistances @ Modules Measuring SHU33/432x Resistances @ Modules Wire color codes: BK = Black BN = Brown BU = Blue GY = Gray RD = Red WH = White YE = Yellow...
  • Page 107 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHU303x/313x Resistances @ Modules Measuring SHU303x/313x Resistances @ Modules diagram selector switches Wire color codes: BK = Black BN = Brown BU = Blue GN = Green GY = Gray RD = Red WH = White YE = Yellow...
  • Page 108 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHU303x/313x/33/430x/432x/53/68/88/99, SHV43/48 Measuring SHU303x/313x/33/430x/432x/53/68/88/99, SHV43/48 Circulation Pump Resistances @ Modules Circulation Pump Resistances @ Modules SHU 430x/53/68 ~ 10Ω CAUTION: Disconnect dishwasher power before measuring circulation pump motor resistance. Not SHU 995x SHU 303x/313x SHU 88/99, SHV 4 HINT: To measure integrated ~ 10Ω...
  • Page 109 Wiring Diagrams/Tech Sheet Wiring Diagrams/Tech Sheet Measuring SHU995x, SHV68 Circulation Pump Resistances @ Measuring SHU995x, SHV68 Circulation Pump Resistances @ Modules Modules SHU 995x/SHV 68 WH/RD ~ 10Ω (with door closed) To measure integrated model HINT: resistances while door is open, use a screwdriver to trip door latch closed.
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  • Page 131 Wiring Diagram IX. Wiring Diagrams/Tech Sheet SHU 43C SHU 53A...
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