Problem Check List - Maytag MFS Series Programming Manual

8.7. PROBLEM CHECK LIST

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 power board (Flash Memory with
software must be implemented)
The display is illuminated, but it's
difficult to read the text on the display.
The machine is not responding on
pressing the keyboard buttons
The machine is not behaving 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
Wrong water level
(the water level sensor must not be
calibrated)
The drum is not turning
(No error message will be generated)
46
Cause
• no external power
• the power connector is not connected
on the board
• the power connector is inverse
connected
• the fuse on the MCG wash computer
has blown
• disconnect the input connector
• check if the flash memory that
contains the software is plugged
in it's socket on the wash computer
• the brightness is not Ok
• no button is functional and the key
switch is in the right position
• if the wrong machine type is selected
the wrong 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 right 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
PROGRAMMING MANUAL
Solving the problem
• Switch on the external power supply
• verify the external power to the machine
• connect the power connector
• check the wiring and connect
the connector as it must be
• if the transformer is broken replace
the MCG wash 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 if the input signals or the +16Vdc
Supply Signal are touching the cabinet
• if there is no Flash Memory plugged in it's
socket at the wash computer, put the right
software on the wash computer
• Change the value for Brightness in the
Configuration Menu until you get a bright
display.
• check if the connector „K" of the keyboard
is well connected
• check if the right 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 right water levels
• select the right 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 info to the
manufacturer
516532 B PUBLICATION DATE 1 JUN 2007.DOC