15
CYCLE, SYSTEMS & COMPONENTS
HIGH WATER LEVEL SWITCH (CONT.)
Checking High Water Level Switch
• Checking continuity through the high water level switch is easier at the
control.
• Disconnect power to dishwasher.
• Gain access to electronic control and check for continuity between the L1
black wire and P3-6 (brown wire). This contact should be open.
• These wires are connected to center terminal # 1 and terminal to the right of
center # 3 on the switch.
• This contact will close when water inside the tub reaches the rails for the
lower wash rack.
WASH MOTOR
The wash motor, mounted to left side of the sump, and is connected to it by two
separate hoses. The permanent split capacitor motor operates on 120 VAC, 1.8
amp 60 Hz.
The motor speed varies as needed for different wash cycles. The speed varies by
changes made to the voltage sine wave, as power is applied to the motor. At full
speed the wash motor runs at approximately 2800 RPM.
The motor speed varies at the beginning of the wash cycle
as the tub fills with water. After the wash motor starts at 310
RPM, it increases speed at a rate of 100 RPM / second until
full speed is reached. The motor speed also varies during
Pulse Wash, where the motor speed is changed from 1600
RPM to 2800 RPM to aid in cleaning the filter, while reducing
noise.
The electronic control monitors the speed of the motor
through the tachometer mounted on the rear of the motor.
(See Figure 13) The tachometer is an AC generator, which
provides feedback information to the control for regulating
the motor speed.
Wash Motor
Figure 12
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