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© 2000 Maytag Appliances Sales Company
Section 9. Dryer Controls Overview
9-7
To aid the service technician, special software
was incorporated into the control boards of
the MDE/DG5500 & MDE/DG7500 dryers. The
software is used to monitor several functions
of the dryer during operation and identify any
abnormalities as they arise. These
abnormalities can be monitored in the
Service Mode and the board will list
previously identified failures as either a Help
or a Diagnostic code.
The Diagnostic codes are identified when the
severity level of the abnormality detected is
higher and service may be required.
Both code lists are stored in separate
permanent memories with a maximum of
nine codes per list.
NOTE: Due to the various differences
in the two dryer control systems, the
following pages will focus first on the
LED dryer then the LCD dryer.
LED DRYER
Accessing Service/Diagnostic Mode:
Pressing down the damp dry and time (-) keys
for 5 seconds places the machine in the
diagnostic mode.
SPECIAL TESTS
The following table lists the various tests
available while in the Service Mode, which
can be accessed by pressing the following
keys:
Press Keys Special Test/Function
wrinkle
release
Diagnostic Codes
dryer
temp(^)
Sequences up the
help/diagnostic code list
dryer temp(v)
Sequences down the
help/diagnostic code list
time (-)
Displays Software Revision
Number
very dry(<)
View current cycle
temperature (C
o
)
start/pause
Start or pause cycle running
but remain in Diagnostic
mode
Diagnostic Codes:
When a problem with the dry system is
detected a diagnostic code is assigned and
logged into the control board memory. An
assigned diagnostic code indicates the dryer
may need to be serviced. The control board
will not log mulitple same codes per cycle,
however, it will log as many diagnostics as
possible for the machine to continue running.
See the diagnostic code table for specific
actions or references to where the proper
action is defined. (See page 15)
Accessing Diagnostic Codes
After the machine is in the diagnostic mode,
a ‘d’ will display and let the technician know
they are in the diagnostic mode. Pressing the
wrinkle release key will access the diagnostic
codes.The diagnostic codes can be viewed by
using the temperature (^) & (v) keys.
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