Service Manual

3-22
n
Whirlpool & Maytag Front-Load Dryers
COMPONENT TESTING
For Service Technician Use Only
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.
TEST #8: Drum LED
NOTE: Refer to the Drum LED circuit at right (Figure 2) to
diagnose the drum LED.
This test is performed if the drum LED does not light when the
dryer door is rst opened.
1. Unplug dryer or disconnect power.
2. Remove the top panel to access ACU and HMI.
3. Verify that the drum LED connector J6 is securely
connected to the ACU (see Figure 1).
4. Check harness and inline connecons between the drum
LED and ACU.
DRUM LED CIRCUIT
ACU
DRUM LED CIRCUIT
J6-1
R
BK
R
J6-2
BK
DRUM LED
¾ If the harness and connecons are good, go to step 5.
¾ If not, repair or replace as needed.
5. Unplug the drum LED connector J6 from the ACU.
6. With a mulmeter set to milliamps, connect mulmeter to
ACU connector J6, pins 1 and 3. Plug in dryer or reconnect
power. Open the door. Measure the current across ACU
connector J6, 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 ACU.
7. Reassemble all parts and panels.
Figure 1 - Drum LED Connector
Figure 2 - Drum LED Strip Circuit
ACU BOARD
J13
J23
J2
J14
J6
J8
J9
Motor Relay
Heater-RED
L1-BLK
Heater Relay #1
(Gas & Electric)
• = Pin 1
K1
K2
K3