Maytag mat12prs ユーザーズマニュアル
©2003 Maytag Appliances Company
16022842 Rev. 0
13
Troubleshooting Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing
requires power.
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.
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 values indicate burned or dirty contacts in a switch.
resistance across a closed contacts. Resistance, even
low values 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.
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. 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.
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
solenoid coils.
solenoid 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.
Examples include lid switches, timer contacts
selector switch and relay contacts.
ELECTRICAL TROUBLESHOOTING
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.
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.
CAUTION
!
Resistance or continuity testing is done with the product
disconnected from power. Failure to do so can result in
damage to your meter.
disconnected from power. Failure to do so can result in
damage to your meter.