FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
PART NO. W10340707A
PAGE 5
DIAGNOSTIC GUIDE
Before servicing, check the following:
■
Make sure there is power at the wall outlet.
■
Are both hot and cold water faucets open and water supply
hoses unobstructed?
■
Check all connections before replacing components. Look for
broken or loose wires, failed terminals, or wires not pressed
into or onto connections far enough.
■
A potential cause of a control not functioning is corrosion on
connections. Observe connections and check for continuity
with an ohmmeter.
■
Connectors: Look at top of connector. Check for broken or loose
wires. Check for wires not pressed into connector far enough
to engage metal barbs.
■
Resistance checks must be made with power cord unplugged
from outlet, and with wiring harness or connectors disconnected.
FAILURE/ERROR DISPLAY CODES
ACCU
TRAC
®
WASHER
INDICATION DISPLAY
EXPLANATION AND RECOMMENDED PROCEDURE
CCU ERROR
The pump drive or one of the main relays in the CCU
fails to activate.
Possible Cause
– A power surge/drop.
Surge/drop procedure
1. Clear error code.
2. Unplug washer or disconnect power.
3. Wait 2 minutes before reconnecting power.
4. Verify CCU by running a short diagnostic test.
If this procedure does not correct the failure, replace
the CCU control.
MCU ERROR
Motor Control Unit (MCU) has a failure.
Possible Cause
– A repeating under or overvoltage condition. If the
failure occurs during a high-speed spin, the door
remains locked for 3 minutes.
Procedure
1. Clear error code.
2. Unplug the washer or disconnect power.
3. Using Ohm meter, check wire harness connections
for continuity between drive motor and the MCU.
4. Check the motor and do a continuity test (page 14).
5. The MCU is good if the motor operates in diagnostic
mode.
If the motor fails to turn on, replace the MCU.
d
6
F 0 1
d
1 1
F 1 1
WASHER DIAGNOSTIC MODE
To enter the ‘Washer Diagnostic Mode,’ first enter ‘Start Operating
Set-Up.’ Then press and hold the QUICK CYCLE button for
1 second while in set-up code 6xx, anytime a diagnostic code
is present, or while dAS displays if operating with Maytag Data
Acquisition set-up.
On entry to diagnostic mode, the entire display will flash, a cycle
in process is canceled, money in escrow is cleared, and diagnostic
codes are cleared. If a diagnostic code persists, it must be
corrected before the following cycle options are permitted.
There are five possible ways to initiate cycle activity from diagnostic
mode as follows:
1.
Washer Cleanout Cycle – With the entire display flashing,
this cycle is started by pressing the BRIGHTS button.
Use the Washer Cleanout Cycle once a month to keep the inside
of the washer fresh and clean. This cycle uses a higher water
level. Use with liquid chlorine bleach to thoroughly clean the
inside of the washer. This cycle should not be interrupted.
IMPORTANT:
Do not place garments or other items in the
washer during the Washer Cleanout Cycle. Use this cycle
with an empty wash drum.
2.
Cycle Credit – With the entire display flashing, a cycle may be
credited by pressing the PERMANENT PRESS button (CC will
display). When the service mode is exited, ‘SELECT CYCLE’ will
be displayed unless the end-of-cycle door opening is required.
3.
Manual Overview Test – With the entire display flashing,
this cycle is started by pressing the WHITES button. This cycle
provides more typical full length fills, tumbles, and drains, allowing
for a more thorough analysis of the washer operation, including
pressure switch behavior.
4.
Quick Spin Cycle – With the entire display flashing, this cycle is
started by pressing the COLORS button. This cycle provides a
method to quickly drain and spin (remove water from the washer),
if desired.
5.
Quick Overview Test – With the entire display flashing, this cycle
is started by pressing the DELICATES AND KNITS button. This
cycle provides a quick verification that the cold and hot water
valves and pump motor are working. It also includes door lock,
drain, and spin operations.
Pressing the QUICK CYCLE button will exit diagnostic mode
and cancel a diagnostic cycle in process.
