Whirlpool WET4027HW0, Service Manual

Page: 42 / 82

3-12
n
27” Stacked Laundry Center
TESTING – WASHER
For Service Technician Use Only
TEST #4: Console and Indicators
Console and Indicators Check:
This test is performed when any of the following situations
occurs during “UI Test Mode” on page 2-4.
n
None of the LEDs light up
n One or more Status LEDs are flashing
n
Turning rotary switch does not toggle LED
None of the LEDs light up:
1. Unplug washer/dryer or disconnect power.
2. Access the main control and visually check that ALL
connectors are inserted all the way into their respective
headers. See Figure 1.
3. Visually check that the main control assembly is properly
inserted in the console.
4. If both visual checks pass, follow procedure under TEST
#1, “Main Control” on page 3-5 to verify supply voltages.
5. To verify repair, activate the Service Diagnostic Mode, and
then perform UI Test Mode on page 2-4.
One or more Status LEDs are flashing:
If one or more of the status LEDs are flashing (on and off in 0.5
second intervals), refer to the following notes to identify the
switch(es) in question. Reference the wiring diagram on page
3-4 when performing the following procedures.
a. Verify the switch connector is inserted all the way into the
main control.
b. Check the harness between the switch and main control
for continuity. Check for shorts.
c. Replace the switch.
NOTE 1: The number and location of rotary switches varies
between makes and models.
NOTE 2: Regardless of location, switches are read from left to
right, the left-most switch being #1.
NOTE 3: Each rotary switch and the cycle selector knob is
represented by the following status LEDs:
• Rotary Switch #1 – toggles (1) Sense/Fill LED
• Rotary Switch #2 – toggles (2) Wash LED
• Rotary Switch #3 – toggles (3) Rinse LED
• Rotary Switch #4 – toggles (4) Drain/Spin LED
• Cycle Select Knob – toggles (5) Done LED
NOTE 4: Status LED names may vary between makes and
models. Use LED # identification.
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DES TROY
FAULT CODE DISPLAY MODE (Pgs 6–7)
To access fault/error codes, perform steps 1
and 2 of Activating the Service Diagnostic Test
Modes. Turn the cycle selector knob until the
status LEDs correspond as follows:
„
“Done” LED On
Press the START button to enter Fault Code
Display Mode. The status LEDs flash on and off.
1. To view last four fault codes:
¾
Turn cycle selector knob clockwise
to view fault codes in the order of most
recent to oldest. (Refer to Fault/Error
Code charts on pages 6 & 7.)
NOTE: A fault/error code will be removed
from memory if it does not reoccur after
10 consecutive wash cycles.
2. To clear fault codes:
¾
Turn cycle selector knob until the status LEDs
flash ON and OFF (see figure 2, page 2).
¾
Press and hold the START button
for 3 seconds to clear all fault codes
and exit Fault Code Display Mode.
Fault/Error Code Display Method
Fault/error codes are displayed by alternating the
state of the Status LEDs in one second intervals.
All fault/error codes have an F# and an E#. The
F# indicates the suspect System/Category and
the E# indicates the suspect Component system.
If the Sense/Fill LED is
ON , the Fault Number
is represented; if OFF, the Error Number is
represented (see example below). The remaining
LEDs (Wash, Rinse, Drain/Spin, and Done)
represent the fault and error code in binary. (See
Fault/Error Code Charts on pages 6 & 7 for more
information.) = ON.
LED names may vary between makes and models.
3. There are several accessible Diagnostic
Test Modes shown in the chart below. To
select the desired Mode of Operation, turn
the cycle selector knob until the status LEDs
match the mode desired to enter.
4. Press the START button to enter desired
mode of operation.
Refer to the following pages for detailed
information on each mode of operation:
„
FAULT CODE DISPLAY MODE: Page 3
„
AUTOMATIC TEST MODE: Page 4
„
MANUAL TEST MODE: Page 4
„
CALIBRATION MODE: Page 4
„
SALES DEMO: NOT FOR SERVICE USE*
„
UI TEST MODE: Page 4
„
SW VERSION DISPLAY MODE: Page 5
„
FACTORY DIAGNOSTICS: NOT FOR SERVICE USE.*
If accessed, washer must be recalibrated (see
Calibration Mode)
„
TACHOMETER VERIFICATION MODE: Page 5
„
DRY FACTORY DIAGNOSTICS: NOT FOR SERVICE
USE*
„
FACTORY CAL TEST CYCLE: NOT FOR SERVICE USE*
„
AATCC CYCLE: NOT FOR SERVICE USE*
„
NVH CYCLE: NOT FOR SERVICE USE*
*Press and hold START for 3 seconds to exit.
Unsuccessful Entry
If entry into diagnostic test mode is unsuccessful,
refer to the following indication and action:
Indication : None of the LEDs turn on.
Action: Press START button to enter setting mode.
¾
If indicators come on, repeat steps
1 through 4 of Activating the Service
Diagnostic Modes. NOTE: Rotating the
dial too fast or too slow will affect entry.
¾
If no indicators come on after pressing the
START button, go to TEST #1, page 12.
EXITING THE SERVICE
DIAGNOSTIC TEST MODES
Press and hold the START button for 3 seconds
at any time to exit diagnostic test modes.
Washer will exit diagnostic test modes after 5
minutes of inactivity or unplugging the power cord.
MODE
(Status LED names may vary
between makes and models)
Fault Code Display Mode
Automatic Test Mode
Manual Test Mode
Calibration Mode
Sales Demo Mode
UI Test Mode
SW Version Display Mode
Factory Diagnostics Mode
Tachometer Verification
STATUS LEDs
DIAGNOSTIC TEST MODES
W
ASH
RINSE DRAIN SPIN DONE
Dry Factory Diagnostics
Factory Cal Test Cycle
AATCC Cycle
NVH Cycle
DISPLAY
(Only on models
with a display)
02
03
04
05
06
07
08
09
0 1
10
1 1
14
15
1 F 8 4 2 1 F2
0.5
2 0.5
3 E 8 4 2 1 E3 0.5
4 1.0
Repeat…
STATUS LEDs
Frame Numbe
r
SENSE FILL W
ASH
RINSE SPIN DONE Fault / Error Code Frame
Ti
ming (sec.)
DRAIN
Sense Wash Rinse Drain Done
Fill Spin
Turning rotary switch does not toggle LED:
Perform the procedures under “One or more Status LEDs are
flashing.”
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Failure to do so can result in death or
electrical shock.
Replace all parts and panels before operating.
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
WASHER TROUBLESHOOTING TESTS
TEST #1: Main Control
This test checks for incoming and outgoing supplies
to and from the main control. This test assumes
that proper voltage is present at the outlet.
1. Unplug washer/dryer or disconnect power.
2. Remove console to access main control.
3. Verify that ALL connectors are inserted
all the way into the main control.
4. Plug in washer/dryer or reconnect power.
5. With a voltmeter set to AC , connect black
probe to J5-2 (Neutral) and red probe to J5-1 (L1).
¾
If 120VAC is present, go to step 6.
¾
If 120VAC is not present, check the AC
power cord and power harness for continuity
(See Figure 9).
Main Control Board Connectors & Pinouts (Figure 3)
J12-4 GRY –5VDC (CIRCUIT GND)
J12-3 BLU SHIFTER POSITION INPUT
J12-2 PNK RPM INPUT
J12-1 BLK +12VDC
J9-8 OPEN
J9-7 OPEN
J9-6 OPEN
J9-5 BLU COLD VALVE (N)
J9-4 BK/W COMMON (L1)
J9-3 OPEN
J9-2 OPEN
J9-1 RED HOT VALVE (N)
J5-2 BLK NEUTRAL
J5-1 BLK L1
J12
J9
J5
J3
J2
J6
SHIF
TER
VA
LVES
POWER
HARNES
S
ROT
ARY ENCODERS
LID L
OCK
DR
AIN MOTOR
J3-6 BLK ROW 2
J3-5 BLK ROW 3
J3-4 BLK COLUMN 0
J3-3 RED COLUMN 1
J3-2 RED COLUMN 2
J3-1 RED COLUMN 3
J6-3 RED LOCK SWITCH
J6-2 WHT L1
J6-1 BLU LID SWITCH/LOCK SOLENOID
J2-6 RED MOTOR CW WINDING (N)
J2-5 ORN MOTOR CCW WINDING (N)
J2-4 BK/W MOTOR (L1 COMMON)
J2-3 LT BLU DRAIN PUMP MOTOR (N)
J2-2 BK/W L1 COMMON
J2-1 BRN SHIFTER MOTOR (N)
e
e
e
e
e
6. Is the “Diagnostic LED” ON or OFF?
(See Figure 3 below for LED location.)
¾
ON: (+5VDC present) continue to step 7.
¾
OFF: (+5VDC missing) proceed to step 8.
7. With a voltmeter set to DC , connect black
probe to J12-4 (Circuit Gnd) and red probe to
J12-1 (+12VDC).
¾
If +12VDC is present, main control
supplies are good.
¾
If +12VDC is not present, go to step 8.
8. Check if shifter assembly is affecting the
main control DC supplies.
a. Unplug washer/dryer or disconnect power.
b. Remove connector J12 from main control.
c. Plug in washer/dryer or reconnect power.
d. Repeat steps 6 and 7. Perform the +12VDC
check inside header J12 on the board – do not
short pins together .
e
J12 Shifter
e
J9 Valves
e
J5 Power Harness
e
J3 Rotary
Encoders
e
J6 Lid
Lock
J2 Drain/
Motor
e
e
e
= represents
pin 1
Diagnostic LED
Figure 1