Test #3: Motor Circuit - Whirlpool WED9500E SERIES Service Manual

COMPONENT TESTING
WARNING
9. Reassemble all parts and panels.
9. Reassemble all parts and panels. Electrical Shock Hazard
Disconnect power before servicing.
10. Plug in dryer or reconnect power.
10. Plug in dryer or reconnect power.
Replace all parts and panels before operating.
11. Perform steps under "Service Test Mode",
11. Perform steps under "Service Test Mode",
page 3, to verify repair.
Failure to do so can result in death or
page 3, to verify repair.
electrical shock.

TEST #3: Motor Circuit

TEST #3: Motor Circuit
This test will check the wiring to the motor
This test will check the wiring to the motor
and the motor itself. The following items are
and the motor itself. The following items are
part of this motor system:
TEST #3: Motor Circuit
part of this motor system:
Part of Motor System
Part of Motor System
This test will check the wiring to the motor and the motor
Drum belt
itself. The following items are part of this motor system:
Drum belt
Door switch
Door switch
Part of Motor System
Harness/connection
Harness/connection
Drum belt
Thermal fuse
Door switch Thermal fuse
Drive motor
Harness/connection
Drive motor
Centrifugal switch
Thermal fuse
Centrifugal switch
Machine control electronics
Drive motor
Machine control electronics
NOTE: Refer to strip circuit on page 25
Motor capacitors (Maytag)
NOTE: Refer to strip circuit on page 25
to diagnose drive motor.
to diagnose drive motor.
Centrifugal switch
1. Unplug dryer or disconnect power.
Machine control electronics 1. Unplug dryer or disconnect power.
2. Remove console to access the machine
2. Remove console to access the machine
electronics.
NOTE: Refer to strip circuit on page 3-11 to diagnose the drive
electronics.
motor.
3. Check for loose, worn, or damaged drum
3. Check for loose, worn, or damaged drum
1. Unplug dryer or disconnect power. belt—repair as necessary.
belt—repair as necessary.
2. Remove console to access the machine electronics.
4. Door Switch problems can be uncovered
4. Door Switch problems can be uncovered
3. Check for loose, worn, or damaged drum belt—repair as
by following procedure under TEST #7:
by following procedure under TEST #7:
necessary.
Door Switch, page 22; however, if this was
Door Switch, page 22; however, if this was
4. Door Switch problems can be uncovered by following
not done, the following can be performed
not done, the following can be performed
procedure under TEST #7: Door Switch, page 3-20;
without applying power to the dryer. Connect
however, if this was not done, the following can be
without applying power to the dryer. Connect
an ohmmeter across ACU J8-3 (neutral, white
performed without applying power to the dryer. Connect
an ohmmeter across ACU J8-3 (neutral, white
wire) and J8-4 (door, tan wire).
an ohmmeter across ACU J8-3 (neutral, white wire) and
wire) and J8-4 (door, tan wire).
J8-4 (door, tan wire).
With the door properly closed, the ohmmeter
With the door properly closed, the ohmmeter
¾ With the door properly closed, the ohmmeter should
should indicate a closed circuit (0–2 ).
indicate a closed circuit (0–2 Ω).
should indicate a closed circuit (0–2 ).
If not, check harnesses and connections
¾ If not, check harnesses and connections between
If not, check harnesses and connections
between ACU and door switch. If good,
ACU and door switch. If good, replace the door switch
between ACU and door switch. If good,
replace the door switch assembly.
assembly.
replace the door switch assembly.
5. Motor Circuit Check - Access the ACU and
5. Motor Circuit Check - Access the ACU and
measure the resistance across J8-4 and J9-1.
measure the resistance across J8-4 and J9-1.
If resistance across J8-4 and J9-1 is in
If resistance across J8-4 and J9-1 is in
the range of 1 to 6 , the motor circuit is
the range of 1 to 6 , the motor circuit is
acceptable. Replace the ACU.
3-10 Whirlpool & Maytag 9.2 Cu. Ft. Steam Dryer
n
acceptable. Replace the ACU.
Otherwise, continue to step 6.
Otherwise, continue to step 6.
6. Check the wiring and components in the path
For Service Technician Use Only
FOR SERVICE TECHNICIAN'S USE ONLY
FOR SERVICE TECHNICIAN'S USE ONLY
Electric
Electric
Dryer
Dryer
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Electric Dryer Gas Dryer
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ü
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ü ü
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5. Motor Circuit Check - Access the ACU and measure the
resistance across J8-4 and J9-1.
¾ If resistance across J8-4 and J9-1 is in the range of 1 to
6 Ω, the motor circuit is acceptable. Replace the ACU.
¾ Otherwise, continue to step 6.
6. Check the wiring and components in the path between
these measurement points by referring to the appropriate
wiring diagram (gas or electric) on pages 3-4 or 3-5.
NOTE: To access motor system components, slide the top
ALL DRYERS: Check the thermal fuse. See TEST
ALL DRYERS: Check the thermal fuse. See TEST
back and remove the front panel.
#4b: Thermal Fuse, page 20.
#4b: Thermal Fuse, page 20.
ALL DRYERS: Check the thermal fuse. See TEST #4b: Thermal
Continue with step 7 below to test the remaining
Continue with step 7 below to test the remaining
Fuse, page 3-15.
components in the motor circuit.
components in the motor circuit.
Continue with step 7 below to test the remaining components
in the motor circuit.
7. Check the drive motor. Slowly remove the
7. Check the drive motor. Slowly remove the
7. Check the drive motor. Slowly remove the drum belt from
drum belt from the spring-loaded pulley, gently
drum belt from the spring-loaded pulley, gently
the spring-loaded pulley, gently letting the pulley down.
letting the pulley down. See figure 7.
letting the pulley down. See figure 7.
See figure 1.
Gas
Gas
Dryer
Dryer
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
Drum
Drum
ü
ü
ü
ü
Figure 7 - Slowly remove drum belt.
Figure 7 - Slowly remove drum belt. Figure 1 - Slowly remove drum belt.
8. Remove the white connector from the drive
8. Remove the white connector from the drive motor switch.
8. Remove the white connector from the drive
motor switch. See figure 8.
See figure 2.
motor switch. See figure 8.
Drive Motor Switch
White Drive Motor Switch
White
Connector
Connector
Figure 2 - Remove white connector
Figure 8 - Remove white connector.
Figure 8 - Remove white connector.
Pulley
Pulley
Belt
Belt