TECH SHEET - DO NOT DISCARD
PAGE 5
FOR SERVICE TECHNICIAN’S USE ONLY
PART NO. W10177459A
➔
If there is no continuity, disconnect the white
wire of the harness from the power cord at
the location illustrated in figure 5. Test the
continuity of the power cord neutral wire as
illustrated in figure 6. If an open circuit is
found, replace the power cord. Otherwise,
go to step 6.
6.
In a similar way, check the continuity between
the L1 terminal of the plug and P9-2 (black
wire) on the control board.
➔
If there is continuity, go to step 8.
➔
If there is no continuity, check the continuity
of the power cord in a similar way to that
illustrated in figure 6, but for power cord’s
L1 wire.
➔
If an open circuit is found, replace the power
cord. Otherwise, replace the main harness.
7.
Visually check that the P5 connector is
inserted all the way into the machine control
electronics.
8.
Visually check that the console electronics and
housing assembly is properly inserted into the
front console.
9.
If both visual checks pass, replace the console
electronics and housing assembly.
10.
Plug in dryer or reconnect power.
11.
Perform steps under DIAGNOSTIC: Console
Buttons and Indicators, page 1, to verify repair.
12.
If indicators still do not light, perform
TEST #2.
TEST #2
Machine Control Power
Check
This test is used to determine if power is present
at the machine control electronics. This test
assumes that TEST #1 has been completed.
NOTE:
The drum light is controlled by the machine
control on all models.
1.
Plug in dryer or reconnect power.
2.
Open the door.
➔
If the drum light illuminates, then power is
present at the machine control. Go to
step 3.
➔
If the drum light fails to illuminate, the
problem may be as simple as a bad bulb.
Replace bulb with a working bulb. If drum
light still fails to illuminate, continue with
step 3.
3.
Unplug dryer or disconnect power.
4.
Replace the machine control electronics.
5.
Plug in dryer or reconnect power.
6.
Perform steps under DIAGNOSTIC: Console
Buttons and Indicators, page 1, to verify repair.
TEST #3
Motor Circuit
This test will check the wiring to the motor and the
motor itself. The following items are part of this
motor system:
Part of Motor System
Electric
Dryer
Gas
Dryer
Harness/connection
✔
✔
Thermal fuse
✔
no
Belt/belt switch
✔
✔
Drive Motor
✔
✔
Centrifugal switch
✔
✔
Door switch
✔
✔
Machine control electronics. See
ESD information, page 1.
✔
✔
1.
Unplug dryer or disconnect power.
2.
Access the machine control electronics and
measure the resistance across P8-4 and P9-1.
See Accessing & Removing the Electronic
Assemblies, page 9.
➔
If resistance across P8-4 and P9-1 is in the
range of 1 to 6
Ω
, replace the machine
control electronics.
➔
Otherwise, go to step 3.
3.
Check the wiring and components in the path
between these measurement points by
referring to the appropriate wiring diagram (gas
or electric) on page 12.
ELECTRIC DRYER ONLY:
Check the thermal
fuse. See TEST #4b, page 7.
ALL DRYERS:
Continue with step 4 below to
test the remaining components in the motor
circuit.
4.
Check the belt switch and drive motor. Access
the belt switch and drive motor by removing
the back panel. See Removing the Back Panel,
page 11. Slowly remove the drum belt from the
spring-loaded belt switch pulley, gently letting
the belt switch pulley down. See figure 7.
5.
Remove the white connector from the drive
motor switch. See figure 8.
6.
Remove the bare copper wire terminal from
pin 5 of black drive motor switch. See figure 9.
7.
Using figure 9, check for the resistance values
of the motor’s Main and Start winding coils as
shown in the following table.
NOTE:
Main and Start winding coils must be
checked at the motor.
Winding
Resistance
Contact Points
of Measurement
MAIN
3.3–3.6
Lt. blue wire in back at pin 4
and bare copper wire
terminal removed from pin 5
of black drive motor switch
START
2.7–3.0
Lt. blue wire in back at pin 4
and bare copper wire
terminal on pin 3 of black
drive motor switch
➔
If the resistance at the motor is correct,
there is an open circuit between the motor
and machine control electronics. Check for
failed belt switch.
➔
If the Start winding resistance is much
greater than 3
Ω
, replace the motor.
8.
Check the belt switch by measuring resistance
between the two light blue wires, as shown in
figure 10, page 6, while pushing up the belt
switch pulley.
Main Winding:
Lt.
and Bare Copper Wire
Blue Wire in Back
Start
Winding:
Lt.
and
Bare Copper
Wire
Blue Wire
in Back
1
5
3
4
6
2
Figure 9.
Main and start winding measure
points.
COM
G
L1
L1
Power Cord
Plug
N
N
G
Figure 6.
Power cord terminals, gas dryer.
White
Connector
Drive Motor
Switch
1
5
3
4
6
2
Figure 8.
Remove white connector.
Drum
Belt
Belt Switch Pulley
Figure 7.
Slowly remove drum belt.
