Bosch 4302 - Manual

4 H Warranty / Technical Specifications Warranty 1 st Year Parts & Labor. 2 nd Year Parts only. 3 rd – 5 th Year Electronic Boards, parts only. 3 rd – 5 th Year Racks, parts only.This does not include rack wheels; silverware baskets or plastic shelving. Lifetime Stainless Steel. Must receive a s...

H 5 Model / Serial Number Location Fig. 1-1 Fig. 1-2 Located on the right hand side of the Inner Door is the Model and Serial number tag, Fig. 1-1. The Model and Serial numbers can be found on the left side of the tag within the black outline box, Fig. 1-2.The Model Number for this unit is SH U 5312...

6 H Product Overview Drain Motor Lower Spray Arm Upper Spray Arm Aqua Sensor NTC Flow Switch Circulation Motor / Pump Flow Through Heater Impeller Cover Fig. 2-1 The Bosch dishwasher utilizes a two motor system with separate Circulation and Drain Motors, and a Flow Through Heater controlled by a Flo...

H 9 Section 2 Description Page Operation, SH U 3002 / 3006 / 3012 / 3016 / 4002 / 4006 / 4016 / 4022 / 4026 / 4036 . 10 Cycle Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Operation, SH I 4302 / 4306 S...

10 H Fig. 3-1 Fig. 3-2 Operation SH U 3002/3006/3012/3016/4002/4006/4016/4022/4026/4036 The SH U 30** and 40** are both mechanical units that operate using a basic Timer and Selector Switch. TO OPERATE EITHE R MODE L, (a SH U 4006 is shown): Fig. 3-2. First select a cycle by pushing the correspondin...

H 11 Cycle Chart SHU 3002/3006/3012/3016/4002/4006/4016/4022/4026/4036 Delicate cycle not used on SHU 3002/3006/3012/3016 Drying 85 6.55 24.75 78 6.55 24.75 10 1.19 4.5 Rinse-aid 161˚F Rinse Wash 161˚F Pre-wash 70 5.36 20.25 Type of dishware e.g. china, pots/pans,cutlery,glasses,etc. Wash cycle Cycl...

12 H Fig. 3-3 Fig. 3-4 Operation SH I 4302/4306 S HU 4302/4306/4312/4316 The SHI or SHU 43** series operates using an electronic Control Unit. TO OPERATE: Fig. 3-3. First depress the On/Off Button until it locks in place. Fig. 3-4. Once the On/Off Button is depressed the LED above the previously use...

H 19 Section 3 Description Page Rack System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 – 21 Interior Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

20 H Fig. 4-1 Fig. 4-2 Fig. 4-3 Rack System Rack configurations for individual dishwasher models will vary. However, all Racks areconstructed from a steel wire grid with a graynylon outer covering. Note: Racks may discolor due to the watersupply or types of food remaining onthe dishes. We recommend ...

H 21 Rack System Fig. 4-4 Fig. 4-5 Attached to the Upper Rack is the Upper Spray Arm Assembly. The Upper Spray Arm can be removed from the Upper Spray Arm Assembly for cleaning or replacement by turning the Arm Nut counter-clockwise, Fig. 4-4. And then bringing the Arm down and off the Arm Assembly,...

22 H Fig. 5-1 Interior Features 1 2 3 7 2 4 6 5 Interior features for all model dishwasher covered in this repair manual are identical. Those features include: 1. Strike Plate. The Strike Plate is in a fixed position and cannot be adjusted. 2. Upper Rack Rails and Guide Rollers.3. Door Gasket4. Lowe...

H 25 Interior Features Fig. 5-7 The operating water level of the dishwasher is at approximately the upper edge of the filter basket. Fig. 5-8 The Lower Spray Arm is press fit into the Feeder Tube Socket. To remove the Arm, grasp the Arm Hub and pull up until the Arm disengages from the Socket. The A...

H 27 Washability / Drying WASHAB ILITY There are four factors that play a critical role in Washability: Time, Temperature, Water and Detergent. It is important when attempting to determine the cause of a Washability complaint that all four factors beconsidered and tested. Time: The duration of the p...

28 H Service Reminder From this point in the manual only the technical features and components of the SHU 5312 will be demonstrated. However, due to the overwhelming similarities between the model SHU 5312 and the remaining Bosch Dishwasher line, you will be able to easily diagnose and repair allcur...

H 29 Section 4 Description Page Outer Door Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Door Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

30 H Outer Door Removal Fig. 7-1 Fig. 7-2 Fig. 7-4 Fig. 7-3 To remove the Outer Door, open the door and remove the six T-20 Torx screws located three on each side of the InnerStainless Door, Fig. 7-1. Return the door back to its upright position, and bring the bottom of the Door Panel out toward you...

H 31 Door Compoments 4 9 8 4 9 1 7 6 2 3 5 Fig. 7-5 Once the Outer Door has been removed the following components become visible. 1. Dispenser Assembly 2. Condensation Tube 3. Upper Wiring Harness 4. Door Guards 5. Door Seal 6. Bituminious Insulation 7. Cloth Fiber Insulation Also note the Toe Kick,...

32 H Dispenser Operation Fig. 8-1 Fig. 8-2 Fig. 8-3 Fig. 8-4 2 1 1 When the Dispenser requires Rinse Agent a Magnetic Float, Fig. 8-3, item 1, will lower and draw the contacts of a Reed Switch, Fig. 8-3, item 2, together. This completes the circuit, and activates the RefillRinse Agent LED located on...

H 33 Dispenser Removal Fig. 8-5 Fig. 8-6 If required, the Dispenser Assembly can be replaced as a complete unit. TO RE MOVE: First remove the: Upper Rack (Section 3, Fig. 4-3). Wiring Connectors for the PTC Actuator, Reed Switch and Condensation Tube. The Condensation Tube is inserted into the right...

34 H Facia Assembly Fig. 9-2 Fig. 9-3 Fig. 9-1 IMPORTANT SE RVICE NOTE: The Facia Assembly cannot beremoved unless the Outer Door isremoved first. See section 4, Fig. 7-1. FACIA ASSEM B LY R EMOVAL: After removing the Outer Door, removethe six T-20 Torx screws securing theFacia Assembly to the Inner...

H 37 Section 5 Description Page Base Components – Front Accessible: Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . 38Circulation Motor Capacitor . . . . . . . . . . . . . . . . . . . 38Leveling Legs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Water Valve ...

38 H Base Components – Front Accessible Fig. 10-2 Fig. 10-1 7 = 6 5 4 8 3 3 1 2 9 = 1 The electrical connection, item 1, is a three wire hook-up that is secured with wire-nuts. The color code is as follows: Black = Hot White = Neutral Green = Ground The Circulation Motor Capacitor, item 2, is a 10uf...

40 H Base Components – Front Accessible Fig. 10-7 Fig. 10-8 1 1 2 Service note: To provide the required access that will allow theDrain Motor to be replaced,the Lower Access Panelmust be removed, and aspreviously mentioned theOuter Door Panel shouldalso be removed. As demonstrated in Figs. 10-7 and ...

H 43 Section 6 Description Page Left Side Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Left Side Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

44 H Left Side Access Fig. 11-2 Fig. 11-3 Fig. 11-1 A B LEFT SI DE PANEL REMOVAL: Remove the two T-20 Torx screws locatedon the top and bottom of the Left Trim Strip,Fig. 11-1, and then slide the Trim Strip upand off the unit. Figs. 11-2 and 11-3 The Side Panel is press fit onto the Frontand Rear Co...

H 45 Left Side Components Fig. 11-4 2 3 5 6 7 4 1 1 8 With the Left Side Panel removed you now have access to the following components: 1. Corner Blocks. 2. Cloth Fiber Insulation Panel.3. Drain Hoses.4. Water Chamber.5. Inlet Water Line.6. Water Level Housing Assembly.7. Sump Fill Hose.8. Left Hing...

46 H Fig. 12-2 Fig. 12-3 Fig. 12-4 Normal Fill Over Fill Base Float Water Inlet / Discharge System – Operation Fig. 12-1 1 2 3 4 5 8 6 7 9

H 47 Water Inlet / Discharge System – Operation WATER SYSTEM OPERATION: Fig. 12-1 is a close up view of the complete Water Systems. FI LLING NORMAL OPE RATION (Fig. 12-2) Fresh water is brought in by the Water Valve and through the Inlet Water Line, item 3. Theincoming water is then directed into th...

48 H Water Inlet / Discharge System – Removal Fig. 12-7 Fig. 12-8 Fig. 12-9 Fig. 12-10 The Water Level Switch and Diaphragm are replace as one assembly. To replace, bend thesmall retaining tab out away from the assembly. Then remove the wiring connector and slide theassembly up and out from the Wate...

H 49 Section 7 Description Page Right Side Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Right Side Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

50 H Right Side Access Fig. 13-1 Fig. 13-2 RIG HT SIDE PANE L RE MOVAL: Remove the two T-20 Torx screws located on the top and bottom of the Left Trim Strip, Fig. 13-1,and then slide the Trim Strip up and off the unit. To remove the panel, refer to Section 6, Figs. 11-2 and 11-3.

H 51 Right Side Components Fig. 13-3 1 2 4 5 3 With the Right Side Panel removed, you now have access to the following components. 1. Circulation Pump / Motor. 2. Base Wiring Connectors. 3. Flow Switch. 4. Heater Assembly. 5. NTC. COMPONENT EXPLANATION: Circulation Pump / Motor. The Circulation Pump...

52 H NTC Operation Fig. 14-1 Located on top of the Heater Assembly is the NTC (Negative Temperature Coefficient), Fig. 14-1. The NTC uses resistance to control wash and rinse water temperature and is connected with two green leads. As water temperature increases, the NTC records the decrease in resi...

H 53 NTC Removal Fig. 14-2 Fig. 14-3 Fig. 14-4 To replace the NTC, first remove the Right SidePanel, Outer Door and Toe Kick, Fig. 14-2. Then, remove the two Front Base MountingScrews, Fig. 14-3. And the single Rear Base Mounting Screw,Fig. 14-4.

54 H NTC Removal Fig. 14-7 Fig. 14-6 Fig. 14-5 Next, remove the Hinge Cover… and, unhook the Pulley Arm from the Hinge by lifting it up… and then off the Hinge.

H 55 NTC Removal Now, from inside the dishwasher remove theLower Spray Arm, Filter Basket and Screen, thenremove the two screws that attach the FeederTube to the Sump, item 1. And the two SumpClamps, item 2. With the block in place you now have the requiredaccess to replace the NTC. Service note: Th...

56 H NTC Removal Fig. 14-11 Fig. 14-12 As demonstrated in Figs. 14-11 and 14-12, raising the Tank provides the necessary access space required to remove either the NTC or the Circulation Pump / Motor. Service note: When re-seating the Tank make sure to check that it is inserted squarely back into th...

H 59 Section 8 Description Page Tank Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 – 62 Base Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

60 H Tank Removal Fig. 15-1 Fig. 15-2 Fig. 15-3 1 2 In order to gain full access to the Circulation Pump / Motor, Heater Assembly and AquaSensor the Tank must be removed. To remove the Tank, start by removing the Outer Door, Left and Right Side Panels, and Toe Kick,leaving the unit as shown in Fig. ...

H 61 Tank Removal Fig. 15-6 Fig. 15-4 Fig. 15-5 Then on both the left and right sides, remove theHinge Covers… and then off the Hinges. and unhook the Pulley Arms from both Hinges bylifting them up…

62 H Tank Removal Fig. 15-9 Fig. 15-7 Fig. 15-8 2 1 1 Fig. 15-7 Now on both the left and right sides removethe T-20 Torx Tank Mounting Screws, item 1,and the Door Hinge Pivot tab, item 2. Fig. 15-8 To remove the Door Hinge Pivot Tab, insertyour T-20 Torx bit into the Tab and bring thescrewdriver dow...

H 63 Base Components Fig. 16-1 4 3 2 1 The Tank can now be removed from the Base. Service note: Once removed, lay the Tank on its back so as not to damage the tank bottom. When re- seating the Tank make sure to check that it’s inserted squarely back into the Sump andseated properly. With the Tank re...

64 H 2 1 Circulation Pump / Motor Removal Fig. 16-4 Fig. 16-2 Fig. 16-3 Fig. 16-5 3 2 4 1

H 65 Circulation Pump / Motor Assembly Fig. 16-6 Fig. 16-7 CIRCULATION PUM P / MOTOR REMOVAL: Disconnect the four wire leads, then grasp the Circulation Motor and turn clockwise a quarter turn until the Motor stops, Fig. 16-2. Now, remove the Motor / Rear Pump Assembly from the Front PumpHousing, Fi...

66 H Drain Motor Lower Spray Arm Upper Spray Arm Aqua Sensor NTC Flow Switch Circulation Motor / Pump Flow Through Heater Impeller Cover Heater Assembly Removal Fig. 16-8 Fig. 16-9 Fig. 16-10 3 1 4 2

H 67 Heater Assembly Fig. 16-11 Fig. 16-12 1 2 3 4 6 7 The Heater Assembly, Fig. 16-8 is a flow through design, taking water in from the Circulation Pump and then sending it out the two discharge outlets to the Upper and Lower Spray Arms, Fig. 16-10. HEATER ASSEM B LY RE MOVAL: See Fig. 16-9, first ...

68 H Aqua Sensor Fig. 16-13 Fig. 16-14 The Aqua Sensor turbidity measuring device, Fig. 16-13, which is available only on select models, evaluates the pre-wash water using a beam of light and a pick-up sensor. If the beam passes easily through the pre-wash water then no additional wash water is adde...

H 69 Door Spring Removal Fig. 16-18 Fig. 16-15 Fig. 16-16 Fig. 16-17 The Door Springs are located on thebottom of the Base, Fig. 16-15, andoperate via a Spring Cable and Reelthat counter balances the weight ofthe Outer Door, Fig. 16-16. If a Door Panel Kit is applied to thedishwasher, the factory sp...

H 71 Section 9 Description Page Wiring Diagrams / Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 72 — 84 Description Diagrams Test Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

72 H Diagram 1 SH I /U 43— MODELS To begin the test program, press the POWER SCR UB PLUS and R EG ULAR WASH buttons both in at the same time as you turn the unit on by pressing the ON/OFF button. When released the LE D’s for the two programs will begin flashing. To check all LED indicator lamps pres...

H 73 Diagram 2 M F 1 M 1 M 1 M 1 u6 u8 161˚F e6 e5 PTC L permanent split capacitor motor N u4 b3 12 11 10 9 8 7 6 5 4 4 3 1 2 2 1 2 4 4 3 a a 1 b b 2 4 1 3 b a a a b b b 5 6 1 2 a 2 4 1 r1 m2 m3 m1 A2 s2 e0 N L1 a1 u5 u3 f4 f1 h1 b2 140˚F f3 b1 u2 185˚F f5 current path Symbol Key current path a1 MAI...

74 H Diagram 3 e0 Selector Switch – b WH G N-u-4b WH-f4 G Y R D-u-6b VT -u-8b G N-u-6a VTB K -u-2a 1 2 3 4 5 6 b. b. b. b. b. b. On / Off Switch – a1 Door Switch – e0 WH R D-l6-9 B K -l1-L1 WH R D-A2 WH-l1-N WHVT -u-4 R D-l6-5 2 1 3 4 5 6 h1 a1 Timer – u YE-f4 RD-A2 BK-m2-1WHGN-b-1VTBK-b-5GYBK-e5-1 ...

H 75 Diagram 4 WASH STALL RINSE STALL 1 2 3 4 5 16 6 18 7 8 9 10 11 12 13 14 15 17 19 20 21 42 22 23 24 25 26 37 47 27 28 35 32 29 30 31 33 34 36 38 39 40 41 43 44 45 46 48 49 50 51 52 53 54 55 56 57 60 58 59 60 60 60 60 24 0 24 0 24 0 60 5 5 45 U U f4+5 60 55 f3+5 60 60 f1+55 f1+5 30 30 24 0 f1+55 ...

76 H Diagram 5 M F 1 M 1 M 1 M 1 u6 u8 161˚F e6 e5 PTC L N u4 b3 12 11 10 9 8 7 6 5 4 4 3 1 2 2 1 2 4 4 3 a a 1 b b 2 4 1 3 b a a a b b b 5 6 1 2 a 2 4 1 r1 m2 m3 m1 A2 s2 e0 N L1 a1 u5 u3 f4 f1 h1 b2 140˚F f3 b1 u2 185˚F f5 current path Symbol Key current path a1 MAIN SWITCH 2 e0 DOOR SWITCH 3 A2 A...

H 77 Diagram 6 e0 Selector Switch – b WH G N-u-4b WH-f4 G Y R D-u-6b BNBK -u-8b G N-u-6a VTB K -u-2a 1 2 3 4 5 6 b. b. b. b. b. b. On / Off Switch – a1 Door Switch – e0 WH R D-l6-9 B K -l1-L1 WH R D-A2 WH-l1-N WHVT -u-4 R D-l6-5 2 1 3 4 5 6 h1 a1 Timer – u BKBU-f4 RD-A2 BK-m2-1WHGN-b-1VTBK-b-5GYBK-e...

78 H Diagram 7 WASH STALL RINSE STALL 1 2 3 4 5 16 6 18 7 8 9 10 11 12 13 14 15 17 19 20 21 42 22 23 24 25 26 37 47 27 28 35 32 29 30 31 33 34 36 38 39 40 41 43 44 45 46 48 49 50 51 52 53 54 55 56 57 60 58 59 60 60 60 60 24 0 24 0 24 0 60 5 5 45 U U f4+5 60 55 f3+5 60 60 f1+55 f1+5 30 30 24 0 f1+55 ...

H 79 1 1 1 1 1 1 1M 1M 1 M 1 X1 X2 l4 7 6 3 2 1 1 3 4 5 6 2 e0 12.7-1 f2-f4 12.6-1/2 12.5 12.9 12.8 A1 12.2 12.4 12.4-1 12.7-2 12.4-2 185˚F A2 1 2 8 7 3 NTC 4 2 1 1 4 4 e3 e5 F N L1 a1 Control Unit m2 m3 e6 s2 f1 f5 r1 12.1-1 12.1-2 12.1-3 dependent on equipment 1 Symbol Key a1 ON/OFF SWITCH e0 DOOR...

80 H Control Unit – l2 On/Off Switch – a1 Door Switch – e0 Float switch – e6 Electrical Supply – l1 Heating Element – r1 Flow Switch – e5 Drain Motor – m3 Ground – PE Actuator – A2 Circulation Motor – m2 Water Solenoid – s2 Water Level Switch – f1 NTC – f2 & f4 / Thermostat – f5 Wiring Connector...

BS H Home Appliances 2800 South 25th AvenueBroadview, Illinois 60153