Service Access Code; Diagnostic Test - Maytag Commercial MHN30PD Manual

FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
Critical errors are indicated as part of the scrolling 'out of order'
message. NOTE: Errors d5, d13, and d16 will not stop the ongoing
cycle, although they will not allow another cycle to begin until the
error is addressed or is self-corrected.

SERVICE ACCESS CODE

This code can be entered to access service mode without removing
the console. It only functions on washers set up for 0 vend price
without any Special Pricing set-up, and the Coin/Debit Option must
be set to "J._d". If the washer is not in failure mode, the door must
be opened to proceed. Service Access Code contains 6 steps and
some are timed. Using only the three bottom buttons (numbered 1,
2, and 3 from left to right):
1. Press 2 for longer than 2 seconds but less than 10 seconds.
2. Press 1 & 3 together for 2 seconds, then release. Displays S 3.
3. Press 1 & 2 together, then release. Displays S 4.
4. Press 2 & 3 together, then release. Displays S 5.
5. Press 2, then release. Display shows "codE".
6. Wait at least 2 seconds, but not more than 15 seconds, then
press in succession: 3, 2, 1, 3.
NOTE: If the Service Access Code procedure is not completed
properly, as noted above, there is a 15 second delay before it can
be attempted again.
There are 3 options to exit from the Service Mode:
1. From Set-up Code 8, press button #1 for 4 seconds.
2. Wait 2 minutes without touching any buttons
(without diagnostic modes running).
3. Power down the washer, then reapply power.

DIAGNOSTIC TEST

The washer has two different modes of diagnostics:
The Manual Keypad Function in Diagnostic Sub-Modes allows
running of diagnostic cycles. This allows a more thorough analysis
of washer operation, running of a Quick Drain and Spin, and
crediting of free cycles to the user. A Washer Cleanout Cycle may
also be run from this mode.
The Help Mode allows verification of the help codes that are
currently present on the washer, and to check the software revision
of the CCU and UIC. It also gives feedback of the current state
of the valves, actuators, sensors, and general state of the washer.
KEYPAD FUNCTION IN DIAGNOSTIC SUB-MODES
The washer is capable of assuming three sub-modes:
1. Code Display
2. Flashing Mode
3. Special Cycle Mode
Code Display
a) Accessing the Code Display Mode:
This mode can be accessed only when the washer is in error state.
For PD Models:
Open the service door.
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The current F code or d code will be displayed.
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If the washer is showing an error code, consult "FAILURE/ERROR
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DISPLAY CODES", page 5.
PART NO. W10340707A
For PN Models:
Remove the AA1 connector from the UIC board or insert a manual
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diagnostic card.
Enter the Service Access Code (see Service Access Code section,
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this page) for PN washer models without a key switch installed.
Insert key and turn, if diagnostic key switch is installed.
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The current F code or d code will be displayed.
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If the washer is showing an error code, consult "FAILURE/ERROR
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DISPLAY CODES", page 5. Displayed error codes that are not
listed in this manual are most likely caused by a card reader
device. Please contact the card reader manufacturer for
explanation of these codes.
b) Functions of the Code Display Mode:
Display of the current failure code.
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To erase the current error code and access Flashing Mode,
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press and hold QUICK CYCLE button until display is flashing.
To access Set-up Mode, without erasing the current error, press
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DELICATES AND KNITS button for 1 second.
Flashing Mode
This mode allows starting of special diagnostic cycles, running of
a Quick Drain and Spin, crediting of free cycles, and access to the
Washer Cleanout Cycle.
a) Accessing the Flashing Mode:
For PD Models:
Open the service door.
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Press and hold QUICK CYCLE button until display is flashing.
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For PN Models:
Remove the AA1 connector or insert a manual diagnostic card.
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The Service Access Code may be used.
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Insert key and turn, if diagnostic key switch is installed.
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When dAS is displayed, press and hold QUICK CYCLE button
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until display is flashing.
When accessing in flashing mode, the display will be blinking,
turning all the segments on and off. Any cycle in process is
cancelled, any money in customer escrow is cleared, and existing
diagnostic codes are cleared.
b) Functions of the Flashing Mode:
To access the Quick Overview Test, press the DELICATES AND
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KNITS button (description on page 11).
To access the Manual Overview Test, press the WHITES button
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(description on page 11).
To run a Quick Drain and Spin, press the COLORS button.
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To access the Washer Cleanout Cycle, press the BRIGHTS button.
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To Credit a Free Cycle, press the PERMANENT PRESS button.
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To Exit the Flashing Mode and return to Set-up Mode, press the
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QUICK CYCLE button.
Special Cycle Mode
This describes the diagnostic cycles accessed through
the Flashing Mode.
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