Maytag mde-mdg21pra ユーザーズマニュアル

14

16022904  Rev. 0

©2004 Maytag Appliances Company

To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing
requires power.

Continuity test of load devices will show varying levels of
resistance from very low for some transformer and motor
windings to very high for some timer motors and
components on control boards.  Usually it is more
important to know if there is a path for current flow through
a device (continuity ) that to know the exact resistance
(ohms) of the device.

Continuity tests of switches will show virtually no
resistance across a closed contacts. Resistance, even
low value indicate burned or dirty contacts in a switch.

When checking components or circuit paths for
continuity, external wiring should be disconnected to
eliminate false readings through external paths.  Isolate
what you want to test.

For the most part, we will only be concerned with
continuity.  Is there a path or not?  References are made
between a “closed” (Continuity) reading and an “open (No
continuity) reading.  One note, when you get and “open”
reading, try a higher resistance range (setting).  A very
high resistance appears as an “open” on the lower ranges.
For best accuracy always “rezero” meter when changing
ranges and/or the physical position of the meter.

Continuity testing, as related to an electrical component,
is the check of a part for an “open” or closed” circuit.

         

Electrical components fall into two general categories.

1. Loads - Devices that use or consume electricity.

Examples would include drive motor, timer and
solenoids coils.

2. Switches - Devices that control the supply of

electricity to the load or loads in a circuit.
Examples include lid switches, timer contacts
selector switch and relay contacts.

The malfunction of an electrical circuit cannot easily be
diagnosed unless you first understand how it functions
when operating normally.  The electrical schematic and
wiring diagram includes a cycle sequence chart keyed to
the contacts in the timer, relay and/or control switches.

Resistance or continuity testing is done with the product
disconnected from power.  Failure to do so can result in
damage to your meter.

The motor features a leadless motor connection,
comprised of a quick connector wire harness which
connects directly to the motor.   The connector has two
locking tabs securing the connector to the motor switch.
Press on both locking tabs to release the connector from
the motor switch.

With the wire harness connector removed, press inward
on the brown actuator disc in the motor.  The start and run
winding can now be checked for proper ohms.  Place the
leads from an ohm meter on the proper terminals as listed
in the following chart.

Using an ohm meter, you can also check the wiring
harness for continuity from the timer to the motor.