Technical information

Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
16022843 Rev 0 December 2003
12
TROUBLESHOOTING CONTROL BOARD FLOW CHART
Display is
Blank
Make sure washer
is plugged in to
live power source
Enter operator mode
using service switch.
Does display contain a
diagnostic code?
Enter diagnostic
code trouble
shooting guide
Yes
Unplug washer and check
wiring and termination
between transformer, service
switch and control board
No
Plug in washer. Does 25
VDC appear between W on
the control board edge
connector and a control
board mounting nut.
Does 115 VAC
appear across the
primary of the
transformer?
Initiate the manual
reset sequence
Check wiring to
transformer and
power at outlet
No
If problem still
exists replace
control board
Replace the transformer.
Inspect control board for
burned components and
replace it if damaged.
Shorted diodes will
damage new transformer.
Yes
Abnormal
display or
function
Initiate the manual
reset sequence
Clean lint off of
control board
display wires.
No
Does 3.8 VAC
appear between S
on O on the
control board edge
connector?
Yes
If problem still
exists replace
control board