Whirlpool MVWC450XW4 Manual page 3

FOR SERVICE TECHNICIAN'S USE ONLY
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.
DIAGNOSTIC TEST MODES
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
Dry Factory Diagnostics
Factory Cal Test Cycle
Life Test Mode 1
Life Test Mode 2
AATCC Cycle
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*

LIFE TEST MODE 1 & 2: NOT FOR SERVICE USE*

AATCC CYCLE: NOT FOR SERVICE USE*

* Press and hold the START key 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.
 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.
 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.
DO NOT REMOVE OR
STATUS LEDs DISPLAY
(Only on models
with a display)
01
02
03
04
05
06
07
08
09
10
1 1
12
13
14
DESTROY
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
Fill Wash Rinse
Press the START button to enter Fault Code
Display Mode. The status LEDs flash on and off.
1. To view last 4 fault codes:
 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:
 Turn cycle selector knob until the status LEDs
flash ON and OFF (see figure 2, page 2).
 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 Fill or Sensing LED is ON, the Fault
Number is represented; if OFF, the Error Number
is represented (see example below). The
remaining LEDs (Wash, Rinse, Spin, and Done)
represent the fault and error code in binary. (See
Fault/Error Code Charts on pages 6 & 7 for more
information.)
STATUS LEDs
1 F 8 4
2
3 E 8 4
4
Repeat...
LED names may vary between makes and models.
Spin Done
= ON.
2 1 F2 0.5
0.5
2 1 E3 0.5
1.0
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