Whirlpool WED90HEFC W10240504 - Page 22

FOR SERVICE TECHNICIAN'S USE ONLY  If wire and door switch assembly have been replaced and dryer still does not start, replace the CCU. 4. Reassemble all parts and panels. 5. Plug in dryer or reconnect power. 6. Perform the steps under "Diagnostic: Door Switch/Drum LED" to verify repair. TEST #8: Drum LED (on some models) This test is performed if the drum LED does not light. 1. Pressing the DRUM LIGHT button on the console should toggle the button indicator on and off (and the drum LED on and off).  If the button indicator toggles on and off, go to step 2.  If the button indicator does not turn on, go to TEST #6 - "Some buttons do not light," page 21. 2. Unplug dryer or disconnect power. 3. Remove the top panel to access CCU and user interface (UI). 4. Verify the drum LED connector J11 (see wiring diagrams, pages 26 and 27) is securely connected to the UI. 5. Check harness and inline connections between the drum LED and UI.  If the harness and connections are good, go to step 6.  If not, repair or replace as needed. 6. Unplug the drum LED connector J11 (see wiring diagrams, pages 26 and 27) from the UI. 7. With a multimeter set to milliamps, connect multimeter to UI connector J11, pins 1 and 3. Plug in dryer or reconnect power. Press the DRUM LIGHT button on the console until the button indicator is on. Measure the current across UI connector J11, pins 1 and 3. If the drum LED driver is working properly, there should be a measurement of 150-370 mA.  If the current is present, unplug dryer or disconnect power and replace the drum LED.  If the current is not present, unplug dryer or disconnect power and replace the UI. 8. Reassemble all parts and panels. TEST #9: Water Valve (on some models) Activate the Loads Test (see page 5). Perform the diagnostic test "Console ID, Motor, Heater, and Water Valve." Verify that water is being sprayed into the drum. See figure 13. NOTE: The motor and heater are also activated during this test. Refer to strip circuit on page 23 to diagnose water valve. If water leaks from the dryer/too much water being sprayed into the drum: 1. Inside the drum, unscrew the water nozzle. 2. Inspect nozzle opening for residue buildup; clean and replace it. If no water is sprayed in the drum: 1. Verify that water is hooked up and turned on. 2. Unplug dryer or disconnect power. 3. Remove top panel to access the machine electronics. 4. Verify that the red wire coming from the water valve is connected to the CCU, P8-1. Refer to wiring diagrams on pages 26 and 27. Water Nozzle Water Valve Wires Water Valve Assembly Figure 13 - Water System Components. 5. Check Water Valve & Harness-using an ohmmeter, measure the resistance between the CCU P8-1 (red wire) and P9-2 (black wire).  If the resistance is 510-590 Ω, go to step 6; if not, replace the water valve.  If an open circuit is detected, go to step 7. 6. Inside the drum, unscrew and replace the water nozzle using a 7/16" wrench or socket. Retest water valve.  If water does not dispense, go to step 7. 7. Access the water valve by removing back panel; see page 24.  Check that the hose and wires are connected to the water valve assembly (see figure 13). PAGE 22 DO NOT REMOVE OR DESTROY