Symptom
Probable Cause
Suggested Remedy
Machine
starts but
will not
advance in
cycle (cont.)
CPU Board, Ribbon
Cable, or Input/Out-
put Board
Check Input/Output PCB for red output LED will not light for water
valve and drain valve #4,5,6,7,8 .If no output lights illuminated,
check single red light on CPU board. Single red light should be illu-
minated. If light is flashing or not on, remove power from washer
for 2 minutes to reset board. Reapply power to washer and check
red CPU light. If on solid, CPU okay. If still flashing or not on,
replace CPU board. If CPU tests okay, change Ribbon Cables be-
tween CPU and input/output board. (Check GREEN input LED #14
tub empty has lit in a drain mode of formula.) (Make sure
Green input #13 or #14 are lit if fill portion of formula is being
called for.) If red drain valve or water valve output light on Input/
Output PCB is lit, check to insure that 120VAC is going from the
Input/Output PCB to the drain valve or water valve. If no voltage,
replace I/O PCB.
Machine
tumbles in
only one
direction
Variable Frequency
Drive
Check blue and orange wires on variable frequency drive for al-
ternating 0V to 24 VDC for forward and reverse direction from the
Input/Output PCB. If no voltage, see CPU board, Ribbon Cable or
Input/Output PCB below. Be sure to check wire connec
tions at drive.
CPU Board, Ribbon
Cable, or Input/Out-
put Board
Check Input/Output PCB for alternating or Input/Output PCB red
output lights for forward #13 and reverse #14. If no red output
lights illuminated, check single red light on CPU board. Single red
light should be illuminated. If light is flashing or not on, remove
power from washer for 2 minutes to reset board. Reapply power
to washer and check red CPU light. If on solid, CPU okay. If still
flashing or not on, replace CPU board. If CPU tests okay, change
Ribbon Cables between CPU and Input/Output PCB. (If red
forward #13 and reverse #14 output lights on the Input/Output
PCB are illuminated, check to insure that 24VDC is going from the
Input/Output PCB to the variable frequency drive. (SEE WASHER
SCHEMATIC FOR TROUBLESHOOTING VFD.) If no
voltage, replace I/O PCB.
Washes but
does not give
intermediate
spin
Pressure Switch
Pressure switch must be in the empty position to give close the
circuit to the Input/0utput PCB. The green input tub empty light
#14 on the Input/Output PCB must be lighted. Check pressure
switch for continuity across terminals indicating pressure switch
has reset to empty.
Variable Frequency
Drive
Check Variable Frequency Drive
Check all wires on drive to insure a good connection.
Check LED display at VFD before powering down
1) Disconnect power to washer for 2 minutes to reset motor
drive. Reconnect to power and check for LED display on VFD
2) Check incoming power to washer for correct voltage. Line volt-
age out of the specified operating range will cause the drive to
fault.
Washes But
does not give
intermediate
spin (cont.)
CPU board, Ribbon
Cable Input/Output
PCB
Check Input/Output PCB for illuminated red output light for
intermediate spin (Speed 1) #15 and #14 FOR REVERSE. If no
red output light illuminated, check single red light on CPU board.
Single red light should be illuminated. If light is flashing or not on,
remove power from washer for 2 minutes to reset board. Reap-
ply power to washer and check red CPU light. If on solid, CPU
okay. If still flashing or not on, replace CPU board. If CPU tests
okay, change Ribbon Cables between CPU and Input/ Output PCB.
(Check with factory for latest testing procedures for I/O PCB). If
red speed 1# output light #15 on the Input/Output PCB is illumi-
nated.
Machine
starts and
advances
through
cycle but
motor does
not operate
Variable Frequency
Drive and Motor
Check small green, blue, orange, black, white, red wires (shielded
cable) from the VFD to insure a good connection at each termina-
tion point at drive or at relays and including all molex connectors.
1. Disconnect power to washer for 2 minutes to reset motor drive.
2. Check incoming power to washer for correct voltage. Line volt-
age out of the specified operating range will cause the drive to
fault, lighting the red fault light.
3. Check motor. Disconnect from power. Disconnect the three
wires that operate the motor from terminals T-1, T-2, T-3 in the
drive. Reconnect power to the washer.
CPU board, Ribbon
Cable Input/Output
PCB
Check Input/Output PCB for illuminated red motor output lights.
If no red output lights illuminated, check single red light on CPU
board. Single red light should be illuminated. If light is flashing or
not on, remove power from washer for 2 minutes to reset board.
Reapply power to washer and check red CPU light. If on solid,
CPU okay. If still flashing or not on, replace CPU board. If CPU
tests okay, change Ribbon Cables between CPU and Input/Output
PCB. (Check with factory for latest testing procedures for I/O PCB)
If red motor output lights on Input/Output PCB are illuminated.
Run Relay
Check to see if 12VDC to relay coil. If not check I/O PCB.for
12VDC output. Check if 0VDC through contacts (white wire) to I/O
PCB.
Symptom
Probable Cause
Suggested Remedy
Part # 8533-096-001 11/16
Part # 8533-096-001 11/16
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