Section 1. Product Definition; Section 2. Input Modifications Defined - Maytag MAH21PD Supplemental Service Instructions

SECTION 1. PRODUCT DEFINITION:

The model MAH21 is similar to the MAH20 washer, with the following exceptions:
• The door locking mechanism was updated
from a wax motor drive system to a sole-
noid, resulting in faster locking and unlock-
ing of the door. However, a wax motor is
installed in the door lock mechanism for
the sole purpose of unlocking the door in
the event of a power failure. Figure 2
• The water level pressure switch was
relocated from the console to the top of the
pump, thus eliminating the airdome hose.
Figure 6

SECTION 2. INPUT MODIFICATIONS DEFINED

PRESSURE SWITCH INPUT
The pressure switch is a two level pressure
switch. (Figure 1) The low level contacts
provide a path for a 24 VDC sensing circuit,
the high level contacts provide an electrical
path for 120 VAC to the water valve relays
on the board. Another sensor on the board
monitors the high level circuit to determine
when the high level is reached and the
circuit is opened.
During wash fill, the low level of the
pressure switch is sensed (with 24 VDC)
and provides an indication to the control
board that
16008203-03
•
A special sump cap is placed directly above
the sump area which catches the detergent
and allows for a better mixing of the deter-
gent and the wash water. This eliminates
the need for a separate recirculation pump.
Figure 8
•
Mid 2002 will introduce a different drive
motor system called an electronically
commustatic induction motor. The operation
will be similar but the controls will be differ-
ent.
the water level has satisfied the low level
setting. Once satisfied, the 24 VDC circuit is
opened. The board then opens the water
valve relays and shuts off the water valves.
During rinse fill, the high level provides an
indication to the machine control as to
whether the high water level has been
reached. When the water level switch is
satisfied, the pressure switch circuit is
opened and power for the water valves is no
longer passed through the machine control.
Figure 1
©2002 Maytag Appliances
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