Whirlpool WGD9500E SERIES, Service Manual

Page: 14 / 64

2-4
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Whirlpool & Maytag 9.2 Cu. Ft. Steam Dryer
DIAGNOSTICS & TROUBLESHOOTING
For Service Technician Use Only
Diagnostic Guide
Before servicing, check the following:
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Make sure there is power at the wall outlet.
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Make sure control lock is not enabled.
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Has a household fuse blown or circuit breaker tripped? Was
a regular fuse used? Inform customer that a time-delay
fuse is required.
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Is dryer vent properly installed and clear of lint or
obstructions?
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All tests/checks should be made with a VOM (volt-
ohm-milliammeter) or DVM (digital-voltmeter) having a
sensitivity of 20,000 Ω per volt DC or greater.
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Resistance checks must be made with dryer unplugged or
power disconnected.
n
IMPORTANT: Avoid using large diameter probes when
checking harness connectors as the probes may damage
the connectors upon insertion.
n
Check all harnesses and connections before replacing
components. Look for connectors not fully seated, broken
or loose wires and terminals, pin insertion, or wires not
pressed into connectors far enough to engage metal barbs.
n
A potential cause of a control not functioning is corrosion
or contamination on connections. Use an ohmmeter to
check for continuity across suspected connections.
Service Diagnostic Mode
These tests allow service personnel to test and verify all inputs
to the machine control electronics. You may want to do a quick
and overall checkup of the dryer with these tests before going
to specific troubleshooting tests.
Activating Service Diagnostic Mode
1. Be sure the dryer is in standby mode (plugged in with all
indicators off).
2. Select any three (3) buttons (except POWER) and follow
the steps below, using the same buttons (remember the
buttons and the order that the buttons were pressed):
Within 8 seconds,
• Press and Release the 1st selected button,
• Press and Release the
2nd
selected button,
• Press and Release the 3rd selected button;
• Repeat this 3 button sequence 2 more times.
3. If this test mode has been entered successfully, all
indicators on the console will be illuminated for 5 seconds
with “ 888 ” showing in the three-digit display and a tone
will sound. If there are no saved fault codes, all indicators
on the console will turn off, and only the seven segment
display will remain on.
NOTE
: The Service Diagnostic mode will time out after
10 minutes of user inactivity, or shut down if AC power is
removed from the dryer.
Unsuccessful Activation
If entry into diagnostic mode is unsuccessful, refer to the
following indications and actions:
Indication 1
: None of the indicators or display turn on.
Action: Select any cycle.
¾
If indicators come on, try to change the function for the
three buttons used to activate the diagnostic test mode. If
any button is unable to change the function, something is
faulty with the button, and it will not be possible to enter
the diagnostic mode using that button. Replace the user
interface and housing assembly.
¾
If no indicators come on after selecting the cycle, go to
TEST #1, ACU Power Check, page 3-6.
Indication 2:
Console indicators begin flashing immediately.
Action: If console indicators begin flashing on and off
immediately, replace the user interface.
Activation with Saved Fault Codes
If there is a saved fault code, it will be flashing in the display.
Review the Fault/Error Codes table on page 2-8 for the
recommended procedure. If there is no saved fault code,
“ 888 ” will be displayed.
• See “Activating Service Diagnostic Mode” to activate these buttons. Make sure all of step 3 is complete before activation.
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
DIAGNOSTIC GUIDE
Before servicing, check the following:
„
Make sure there is power at the wall outlet.
„
Make sure control lock is not enabled.
„
Has a household fuse blown or circuit breaker
tripped? Was a regular fuse used? Inform
customer that a time-delay fuse is required.
„
Is dryer vent properly installed and clear
of lint or obstructions?
„
All tests/checks should be made with a
VOM (volt-ohm-milliammeter) or DVM
(digital-voltmeter) having a sensitivity of
20,000
1
per volt DC or greater.
„
Resistance checks must be made with
dryer unplugged or power disconnected.
„
IMPORTANT: Avoid using large
diameter probes when checking harness
connectors as the probes may damage
the connectors upon insertion.
„
Check all harnesses and connections
before replacing components. Look for
connectors not fully seated, broken or
loose wires and terminals, pin insertion,
or wires not pressed into connectors
far enough to engage metal barbs.
„
A potential cause of a control not
functioning is corrosion or contamination on
connections. Use an ohmmeter to check for
continuity across suspected connections.
SERVICE DIAGNOSTIC MODE
These tests allow service personnel to test
and verify all inputs to the machine control
electronics. You may want to do a quick and
overall checkup of the dryer with these tests
before going to specific troubleshooting tests.
ACTIVATING SERVICE DIAGNOSTIC MODE
1. Be sure the dryer is in standby mode
(plugged in with all indicators off).
2. Select any three (3) buttons (except
POWER) and follow the steps below, using
the same buttons (remember the buttons and
the order that the buttons were pressed):
Within 8 seconds,
• Press and Release the 1st selected button,
• Press and Release the 2nd selected button,
• Press and Release the 3rd selected button;
• Repeat this 3 button sequence 2 more times.
3. If this test mode has been entered
successfully, all indicators on the console
will be illuminated for 5 seconds with “ ”
showing in the three-digit display and a tone
will sound. If there are no saved fault codes,
all indicators on the console will turn off,
and only the seven segment display will
remain on.
NOTE: The Service Diagnostic mode will time
out after 10 minutes of user inactivity, or shut
down if AC power is removed from the dryer.
Button Press Function Behavior
1st Button - Momentary press
- Press and hold for 5 secs.
- Activates Key Activation
- Exits Service Diagnostics
2nd Button - Momentary press
- Press and hold for 5 secs. - Activates Service Test Mode
- Software Version Display
3rd Button - Momentary press
- Press and hold for 5 secs. - Displays Next Error Code
- Clears the Error Codes
SERVICE DIAGNOSTIC MENU TABLE
& Encoder Test
• See “Activating Service Diagnostic Mode” to activate these buttons. Make sure all of step 3 is complete before
activation.