BOSCH SHU5302 TECHSHEET PDF

HINT: Water valve and drain motor can be measured from front of dishwasher without accessing control module wire harnesses. Resistances are: n n Tech Manual. HINT: Water valve and drain motor can be measured from front of dishwasher without accessing timer wire harnesses. Indicating lights will flash.

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HINT: Water valve and drain motor can be measured from front of dishwasher without accessing control module wire harnesses. Resistances are: n n Tech Manual. HINT: Water valve and drain motor can be measured from front of dishwasher without accessing timer wire harnesses. Indicating lights will flash. Allow dishwasher to drain. Skip this test. Cant skip this test Dont run entire test to save time -- when water starts circulating, measure current in main power line to dishwasher.

Skip test once current has been measured. NOTE: Once its found one of these parts is faulty from incoming current being 1. A spring loaded plunger closes microswitch when water is flowing. Since each control module is shipped without a jumper, existing jumper must be used or jumper must be ordered separately.

Do all resistance checks with power turned off. Identify each wire color and location at the control module before looking at this chart.

For a quick reference for measuring resistances from the front of the dishwasher, please refer to the one page diagram Measuring Resistances from the Front of any SHU or SHI Dishwasher. To access wire harnesses, open door and remove outer door panel by removing three T20 Torx screws on each side of inner door, starting from bottom -- the top six screws hold the fascia panel to the door.

Once screws are out, close door, lift outer door panel up and pull bottom of panel out door panel will drop out. The fault code can't be reset manually it will reset itself 15 minutes after the dishwasher has been turned on after testing how it fills. Measure Resistance through water valve terminals Lift plastic terminal cover and measure resistance through drain motor terminals HINT: Locking type terminals are used push a small 1 blade screwdriver into each terminal notch and slide terminal off at same time.

HINT: Start test program, start any wash cycle or reset dishwasher to run drain motor -- see if water drains. If yes Valve may be OK more testing may be needed. Drain motor may be OK more testing may be needed. If no Turn off dishwasher and replace water valve. Turn off dishwasher and replace drain motor. Measure Current through hot wire into dishwasher should be Must pull out dishwasher and remove or block up tub to replace it.

HINT: Don't pull out dishwasher and remove tub for initial checking only when you're certain one of these parts has failed. When heater comes on, measure current. Bring all three parts before disassembling dishwasher and test each part separately. At control module, measure resistance between two brown wires at left of right harness 55 k at room temperature 72oF. Water level switch is OK. Turn off dishwasher and replace water level switch.

HINT: Must pull out dishwasher and remove left side panel to access water level switch. Clean all debris from dishwasher base. Find three brown wires at far right of control module. Measure resistance between middle wire and left preferred or right wire 1 M. HINT: Don't check this unless customer has brought up long wash times and has measured them.

HINT: The aqua sensor does not affect washability and should not be replaced unless a leak has occurred around it. HINT: Can also measure resistance between inner terminal light and either outer terminal sensor of sensor itself.

HINT: Due to nature of sensor, resistance readings can be inconsistent. HINT: Must pull out dishwasher and remove left side panel to access sensor for measuring or replacing. Sensor can be pulled out of sensor assembly at rear of sump. HINT: Debris can get in if filter basket wasn't properly screwed in and locked.

Resistance through "wax" motor terminals Actuator motor may be OK more testing may be needed. Turn off dishwasher and replace actuator "wax" motor. At control module, measure resistance between two yellow nd wires 2 harness from right Check to see if rinse aid dispenser is empty. If not, turn off dishwasher and replace level switch. Many parts can be snapped out without using tools. The test can run more than one hour to get temperature up to oF , but tests can be cancelled to greatly shorten testing time.

The test program allows draining, filling, circulating and heating to be checked more quickly than running a standard wash cycle. For example, run heating test and measure current coming into dishwasher if current 11A, Hi-Limit, heater and flow switch are OK.

If not, check each part to see which one failed. This test saves time since you can't get to these parts without removing the tank and can't run resistance checks from front of dishwasher because flow switch stays open. Please see page B-1 on using test program to troubleshoot heater, flow switch and Hi-Limit. Problem Washability problems dishwasher won't clean properly.

Possible Cause Inappropriate dishwasher detergent used. Water doesn't circulate properly due to debris in circulation motor impeller. Suggested Action Instruct customer to use a powdered dishwasher detergent e. Cascade powder. Check spray arms clean or replace as needed. Twist and remove filter, then remove debris from right side of sump where water enters circulation pump impeller. If debris has jammed impeller, turn off and pull out dishwasher, remove tank, remove circulation motor and unscrew and clean out impeller.

HINT: If impeller is damaged, replace entire impeller assembly or it won't seal adequately. Filter not locked down securely, allowing debris to enter sump. Twist and remove filter, then remove debris from sump. Instruct customer to twist and lock filter cylinder securely into sump. HINT: Due to high temperature rinse F breaking down food debris and triple filtering system trapping food debris, filters shouldn't normally clog up.

Problem often caused by filter not being securely locked down. Instruct customer to twist and lock filter cylinder securely into dishwasher sump.

HINT: Water level will not affect washability as water fill is measured by pressure, not time water level cannot be adjusted. Drain hose behind dishwasher doesn't have an adequate loop.

Partially clogged air gap, allowing wastewater from prior washes to circulate in dishwasher. Water doesn't drain properly Soap doesn't enter dishwasher due to dispenser actuator A 2 failure. Loop drain hose behind the dishwasher with the top of the loop at least 20" above the floor.

Unclog sink air gap. NOTE: Cleaning sink air gaps is not covered under warranty. See Water doesn't drain properly on page D Turn off dishwasher and test actuator replace if faulty.

Suds or foam remains in dishwasher. Suggested Action HINT: One "wax" motor operates both the detergent and rinse aid dispensers through a mechanical linkage. The system always resets when door closes. Check linkage by moving it manually. Check "wax" motor by running a continuity check on its terminals.

Too much detergent used. Improper detergent used other than powdered dishwasher detergent. Dishwasher doesn't drain properly.

Instruct customer to use less. Instruct customer to use a powdered dishwasher detergent e. Instruct customer on using rinse aid dishes won't dry without it.

Unclog air gap. Make sure top of drain hose loop behind dishwasher is at least 20" above floor add a loop in hose if there isn't one. Standing water in dishwasher base. Minerals in customer water supply. Food debris in dishwasher filters. Dishwasher won't run or indicator lights won't come on. Dishwasher not turned on.

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