Washer Controls - Maytag Neptune MAH3000 Service Manual

WASHER CONTROLS

The control system in the Neptune horizontal axis washer generally consists of a timer and
microprocessor-based machine control. These receive input signals and send output signals to
other equipment in the washer, including the motor and motor control, user input switches,
user indicator lights, the door latch and lock assembly, water valves, drain pump, unbalance
switches, dispenser actuator wax motors, a pressure switch, and a tub light.
The machine control has direct control of these items:
- Motor speed and direction, through signals to the motor control.
- Door lock wax motor.
- Hot and cold water valves, with an input signal from the timer and pressure switch.
- Timer motor.
- On Light.
In general, the timer dial is rotated to a desired setting, selects the cycles options using the
option switches, and starts the washer. The machine control reads the inputs from the timer,
option switches and pressure switch then send output signals to the motor control and other
components based upon those inputs. When the machine control has completed its set of
instructions for the specific timer setting, it energizes the timer motor output to advance the
timer to the next increment, reads a new set of input signals from the timer, and acts upon
them. This continues until the cycle is complete. (See Figure 1-7 & 1-8 for a generic representa-
tion of the Neptune washer control system.)
Figure 1-7
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© 1998 Maytag Corporation
Prior To Series 17
SECTION 1. GENERAL INFORMATION
1-5