Troubleshooting guide

PAGE 20
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
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
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 19.
2. Unplug dryer or disconnect power.
3. Remove the top panel to access CCU
and user interface (UI).
4. Verify the drum LED connector P13
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 P13
from the UI.
7. Plug in dryer or reconnect power.
8. Press the DRUM LIGHT button on the
console until the button indicator is on.
9. With a multimeter set to milliamps, measure
the current across UI connector P13, pins
1 and 3. If the drum LED driver is working
properly, you should measure 150–370 mA.
If the current is present, replace the drum LED.
If the current is not present, replace the UI.
10. Unplug dryer or disconnect power.
11. Reassemble all parts and panels.
TEST #9: Water Valve
Activate the Service Diagnostic Mode and then
select the User Interface/Control System Test (see
page 4). 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 21
to diagnose water valve.
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 24 and 25.
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 22.
Check that the hose and wires are connected
to the water valve assembly (see figure 13).
Water Nozzle
Water Valve Wires
Water Valve Assembly
Figure 13 - Water System Components.