Test #8: Drum Led - Whirlpool WED99HEDW0 Technical Education

DANGER
Electrical Shock Hazard
Only authorized technicians should perform
diagnostic voltage measurements.
After performing voltage measurements,
disconnect power before servicing.
Failure to follow these instructions can result in
death or electrical shock.
DRUM LED STRIP CIRCUIT
USER INTERFACE
Figure 1 - Drum LED Connector on UI
For Service Technician Use Only
R R
J11-1
DRUM LED
J11-2
BK BK
Drum LED Connector

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).
¾ If the button indicator toggles on and off, go to step 2.
¾ If the button indicator does not turn on, go to TEST #6
– "Some buttons do not light," page 6-17.
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 diagram,
page 23) is securely connected to the UI.
5. Check harness and inline connections between the drum
LED and UI.
¾ If the harness and connections are good, go to step 6.
¾ If not, repair or replace as needed.
6. Unplug the drum LED connector J11 (see wiring diagram,
page 6-3 and strip circuit at left) 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.
¾ If the current is present, unplug dryer or disconnect
power and replace the drum LED.
¾ If the current is not present, unplug dryer or disconnect
power and replace the UI.
8. Reassemble all parts and panels.
Figure 2 - Drum LED
HybridCare™ Dryer with Heat Pump Technology
TESTING
n
6-19