Controls Transformer
This transformer is mounted at the back of the control trough and steps a range of 208 to 240 volts
down to 115 volts for the controls. There are two terminals on the controls transformer for incoming
power. One terminal is for 208 to 220 volts and the other is for 221 to 240 volts.
Note: All 60 Hz. 551b. washers have a controls transformer. Always check the incoming voltage and use
the appropriate transformer terminal when installing these washers.
Pressure Switch
The pressure switch sets the water level in the washer and is located in the left rear corner of the con-
trol trough. As the water level rises, it compresses the air in the pressure switch hose. When the washer
reaches the desired water level, the compressed air in the pressure switch hose opens the contacts in
the.switch, shutting off the water. When at the empty level, the pressure switch contacts are closed
allowing the machine to either spin or fill with water. At low level the water will be approximately 1/2”
up from the bottom of the door glass. On high level the water will be approximately 3”-4” up from the
bottom of the door. The pressure switch is sealed and is not adjustable.
Power Connection Terminal Block
This terminal block sets in the right rear corner of the washer and is accessed from the back. Incoming
power to the washer should connect here. (see Electrical under Installation and Operation Section for
exact connections)
Cycle Indicator lights
The 120VAC indicator lights are mounted to the back of the control panel and are held in place with two
tabs. They are removed by squeezing the tabs with a screwdriver. The lights are replaced as a complete
unit.
Temperature Selector Switch
The push-button temperature selector switch is mounted in the center of the control panel and is held in
place with two nuts. It allows the selection of hot, warm or cold water temperatures.
Note: Do not over tighten on reinstallation as the switch can be damaged.
Cycle Selector Switch
The rotary cycle selector switch is mounted to the left of the temperature selector switch and is held in
place with two phillip screws. It allows the selection of 4 different wash cycles.
Rocker Switches
These switches can be replaced individually by squeezing the tabs on the back side and pressing them
out the front of the panel.
A.
Top switch is red and controls Off and On. This switch must be in the On position for the washer
to operate. The off position will cause the washer to stop in the cycle and drain the water.
B.
Middle switch is white and controls Advance and Start. This switch must be held in the start
position momentarily to start a cycle. Wash and rinse baths can be advanced through by holding
the switch in the advance position.
C.
Bottom switch is blue and controls Pause and Run. This switch must be in the Run position for
the washer to advance through the cycle. The washer can be stalled at any point during the
cycle for extended soaks by selecting pause. The door will remain locked and the drain valve will
remain closed keeping the water in the tub.
Lower Service Panel Removal
Remove 2 screws and pull forward to disengage from the locator studs.
Drive Belt Removal
Turn the drive belt(s) off the basket pulley first and
then remove from the motor pulley.
Reverse this procedure for installation.
Circuit Breaker
The circuit breaker mounts to the rear channel. It
carries all of the controls in the machine but does
not include the motor. To reset the circuit breaker
just push in the button.
Control Mounting Trough
Remove top panel to access control trough. (see
Removing Top Panel) It sets on the right side of the
machine and holds many of the controls.
Reversing Timer
The reversing timer operates the variable frequency
drive directly in wash and operates the spin relay
for spin. It is mounted on the left side of the
control trough with two screws. It has three cam
operated switches. Two switches operate the wash
cycle by alternately engaging and sending a 24VDC
signal to the FW and RV terminals of the variable
frequency drive to tumble counter clockwise for 19
seconds, stop for 3 seconds, reverse direction and
tumble clockwise for 19 seconds. The third switch
engages the spin relay for the inter- mediate and
high speed spin portions of the cycle.
Drive Belt
40
41
Part # 8533-031-001 6/22
Part # 8533-031-001 6/22
Machine
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