Problem Check List - Maytag MXS20 Programming Manual

Problem
When the power is switched on:
the display is not illuminated
Remark:
The display must always light up when
the power connector is connected to
the wash computer (Flash memory with
software must be installed)
The display is illuminated, but it's
difficult to read the text on the display.
The display just shows "Bootloader" but
the application does not run.
The washer is not responding when
pressing the key pads.
The washer is not performing as
expected
A program is started, but the outputs
are not activated
Wait is displayed and a counter is
counting down
Unload is displayed and the Door is
Open
Incorrect water level (the water level
sensor must not be calibrated)
The drum is not turning (No error message
will be generated)

Problem Check List

Cause
• No external power
• The emergency button is activated
• The power connector is not connected
on the board
• The power connector is reversed
• The fuse on the washer computer has
blown
• Disconnect the input connector A and B
• Check if the Flash Memory that contains
the software is inserted in its socket
• The brightness is not Ok
• There is no SW loaded in the application
• No button is functional
• There is no beep signal when the buttons
are pressed
• If the incorrect Machine Type is selected
the incorrect outputs will be activated
• Check if connector "R" is connected
• This is a wait state caused by a power
interruption or a safety sequence at the
end of the process
• Check if the "Door Switch" is still closed
• Check if the programmed water levels
are the correct ones
• Check if the correct Machine Type is
selected in the Configuration Menu
• You have changed the Machine Type,
but the standard water levels do not
change
• Check if the belt is broken
• Check the applied motor voltage
• Check if the motor is still functional
• Check the Inverter
Solving the problem
• Switch on the external power supply
• Verify the external power to the
washer
• Deactivate the emergency button
• Connect the power connector
• Check the wiring and connect the
connector as it must be connected
• If the transformer is broken replace
the washer computer
• Check the wiring and the voltage at the
power connector
If the transformer is still OK change
the Fuse
• If the display is lighting up:
verify that the input signals or the +16Vdc
Supply Signal are not touching the cabinet
• If there is no Flash Memory inserted in its
socket on the wash computer, use the
correct software and Flash Memory
• Change the value for Brightness,
Viewing Angle in the Configuration
Menu until you get a bright display
• Load the application software from the USB
flash drive
• Check if the connector "K" of the keyboard
is well connected
• Check if the connector "K" of the keyboard
is well connected
• Check if the correct Machine Type is
selected in the Configuration Menu
• Connect the connector at the correct
position
• Wait until the counter has reached 0
• Do not switch off/on the power again as
you will restart the counter
• If the "Door Switch" is broken, replace the
"Door Switch"
• Set the correct water levels
• Select the correct Machine Type in the
Configuration Menu
• The standard water levels can only be
reinitialized by programming new values
or by loading the Standard Wash programs
again
• Check the tension of the belt or replace
the belt
• Repair the motor power supply circuit
• Change the motor if needed
• Send a request for more information
to Maytag
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