Bosch Appliances 6806, TRUE, 6805, 4306, 4302, 6802 manual Filling, Code, Draining

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Water Inlet / Discharge System – Operation

WATER SYSTEM OPERATION: Fig. 12-1 is a close up view of the complete Water Systems.

FILLING

NORMAL OPERATION (Fig. 12-2)

Fresh water is brought in by the Water Valve and through the Inlet Water Line, item 3. The incoming water is then directed into the Water Level Housing Assembly, item 4, and then on to the Sump via the Sump Fill Hose, item 8.

As the unit fills with water the Diaphragm on the Water Level Housing Assembly expands due to the pressure of air forced up by the incoming water. When the correct water level is reached the Diaphragm moves the Switch Lever, which in turn closes the Water Level Switch.

When the Water Level Switch closes the Water Valve shuts and the Circulation Motor is activated, and the program advances.

Note: Once the Circulation Motor is activated the water level will drop slightly, the unit then calls for a small amount of additional water to be added.

OVER FILL (Fig. 12-3)

As a safety feature, if the Diaphragm were to malfunction the water level would rise and activate the Safety Float, item 5. As the Safety Float rises it in turn closes the Float Switch, item 6. When the Float Switch closes it activates the Drain Motor.

Service tip: If the dishwasher repeatedly fills and drains the cause is most likely a faulty Diaphragm.

BASE FLOAT (Fig. 12-4)

As an additional safety feature, if the Base were to fill with water due to a hose or pump leak the Base Float, item 9, will rise and via a Float Lever and Pushrod, item 8, would close the Float Switch, which in turn activates the Drain Motor.

Service tip: If there is water in the base the Drain Motor will run continually, but will not drain water from the base.

“F” CODE

Dishwashers with a Countdown Display will show an “F” in the display window when a filling fault occurs. Filling faults can be: Water in the base; overfill; and under or no fill.

Live Dealer Display Models with “F” codes:

Since display models are hand filled, achieving the correct water level is difficult, (see Section 3, Fig. 5-7) so the unit will perceive a filling fault and display the “F” code. This is normal, do not attempt a repair.

DRAINING

When the Drain Motor is activated gray water flows from the Sump through the Sump Drain Hose, item 2, around the Water Chamber and out through the Main Drain Line, item 1.

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Contents Bosch Introduction Table of Contents SHI Service Reminder DescriptionSHV Section Customer Service Technical Service Warranty / Technical SpecificationsModel / Serial Number Location NTC Product OverviewProduct Overview Page Section Operation 24.75 20.25 Cycle ChartTo Operate To Cancel a CycleType of dishware China Pots/pans SHU 5302/5304/5305/5306/5312/5314/5315/5316 3.8 2.5 26.9/18.9 22.7/15.9 20.4/14.4 13.5/9.5 0.8 3.2 7Fig Power Scrub Regular Delicate Page Section Rack System Rack System Interior Features Interior Features Water Level Interior Features Detergent / Rinse-Agent Dispenser Washability Washability / DryingDrying HOW this System FunctionsService Reminder Outer Door Removal Door Components Dispenser Operation Outer Door Removal Door Compoments Dispenser Operation Dispenser Removal To InstallTo Remove Important Service Note Facia AssemblyFacia Assembly Removal Door Latch Assembly Removal ON/OFF Switch RemovalControl Unit Removal Page Section = 7 8 2 9 = Base Components Front AccessibleBase Components Front Accessible Base Components Front Accessible Cut Away View Service Reminder Section Left Side Panel Removal Left Side AccessLeft Side Components Water Inlet / Discharge System Operation Code FillingDraining Water Inlet / Discharge System Removal Section Right Side Panel Removal Right Side AccessComponent Explanation Right Side ComponentsNTC Operation NTC Removal NTC Removal NTC Removal NTC Removal NTC is held in place by two locking tabs, items 1 Page Section Tank Removal Tank Removal Tank Removal Base Components Circulation Pump / Motor Removal Circulation Pump / Motor Removal Circulation Pump / Motor AssemblyHeater Assembly Removal Heater Assembly Removal Heater AssemblyAqua Sensor To Replace the Springs Door Spring RemovalPage Section SHI/U 43- Models DiagramDiagram Timer u Power Scrub Flow Switch Circulation Motor Economy BKBU-f4 BU-l6-4 GY-l6-1 BNBK-b-3 Economy NTC Control Unit l2 Ground PE Wiring Connectors I5 Control Unit Reed Switch e3 185˚F On/Off Switch a1 Door Switch e0 BSH Home Appliances