Maytag WU100 User manual

INDEX
SUBJECT
SECTION
1
. ELECTRICAL
TESTEQUIPMENT PAGE
1-1
ElectricalComponentTesting ......1-1
38559
Maytag
Appliance
TestMeter ...... 1-2
38519Volt-Wattmeter.. .....1-6
SECTION
2 . ELECTRICAL
- MECHANICAL
TROUBLESHOOTING
(See
Sectton2lor
DetatledIndex)
SECTION
3 . SERVICE
PROCEDURES
O Control
Panel
Assembly
.
Timer
Timer
Motor
RapidAdvance
Motor
Knoband
Dial.. .
ControlSwitches
IndicatorLights
MicroprocessorBoard ..3-5
TouchPad.. .... 3-6
38186
Clamp-On
Ammeter
38133
Motor
Test
Cord
Water
ValveTest ... 1-11
RinseDispenserTest. .....1-12
38206
Circuit
TestBoard ... 1-13
1-9
2-1
3-1
3-1
3-2
3-3
3-3
3-3
3-4
3-4
Transformer
....
Varistor
Relavs
@ ruuAssembly
Tub..
Tublnsulation...
BaseFrame
TubSupport
Front
& RearL
HingePins eveling
Legs
Terminal
Box.. 3-14
Drip
Flange
andShield ... ... 3-14
HeatingElement
Heater
Hook .
Thermostat
DoorStrike
TopFlange
andChannel
(9 Front, Access
and
ToePanels
Front
and
AccessPanel
3-7
3-8
3-9
3-10
3-1
1
3-11
3-12
3-12
3-13
3-13
3-15
3-16
3-16
3-17
3-17
3-18
@ tnnerDoor . .. 3-22
DoorAdjustmeni
.:..::..:. ......s-2s
DoorSprings.... .....3-23
DoorHinge ....3-24
Door
VentAssembly .. 3'24
DoorPlug ....^ 3-25
DoorGasket.... .....3-25
@ OoorLatchMechanismandDoor
Switch .. 3-27
Door
Switch .
... 3-28
@ OetergentCup
Assembly ... 3-29

SUBJECT PAGE
/=\
!JRinseConditionerDispenser ......3-32
fil fittSvstem ... 3-34
v WaterValve ...3-35
24VDCWaterValve
(Diode) .. 3-36
FloatAssembly... ....3-37
Vent
Cover .... 3-39
(f WashSystem ......3-40
WaterCirculation .....3-41
UpperWashArm. ....3-42
UpperWashArmHose ......3-42
LowerWashArm
andCenter
Spray
Nozzle . 3-42
Strainer . 3-43
Filter. ...3-43
BackFlushArm
andSealRings ..... 3-44
LowerWashArmBearing
.... ......3-44
LowerWashArmSupport 3-44
PowerModule ..3-45
PumpOover .....3-47
Circulatinglmpeller .....3-47
Baffle ... .. 3-47
Drainlmpeller
and
"0"
Ring ..
.
. 3-48
Boot
Seal 3-48
BearingAssembly
andPulley .
.. 3-48
(p Drive
Motor .. 3-50
Belt.. ...3-52
@AtowerAssembly ....3-53
AirlnletAssembly ....3-55
@ nacts andUpperRackTrackAssembly .. 3-56
LowerDishRack .....3-56
UpperDishRack .....3-56
Rack
TrackRemoval .. 3-56
Rack
Track
Shaftand
Roller .. 3-57
DishRackRoller ......3-57
CupRack ......3-57
AdjustableUpperRack
. .....3-57
(p Cabinet,
Woodtop
and
BaseFrame ...... 3-59
WoodTop. ....3-60
Cabinet 3-60
Casters 3-60
Front
CasterSupport .. 3-60
BaseFrame ....3-60
RetainerforFaucet
Coupler .. 3-61
[! Faucet
CouplerandPower
Cord
(WC) .... 3-62
Faucet
Coupler
Disconnect
Lever
an
Fill
andDrainHoses
Nipple
for
Coupler
d ThumbRelease 3-62
3-63
3-63
3-64
Faucet
Coupler . 3-64
GasketforCouplerlnlet .....3-64
PowerCord. ...3-64
SECTION4-SCHEMATICS .......4-1
"OO"Models ........4-2
"O1"Models ...4-24
"02"
Models ...4-36
WU1000Model ......4-48

SUBJECT PAGE
SECTION5.GENERALINFORMATION ......5-1
Specifications "....' 5'2
UndercounterModels '..5-2
Convertible
Models ' ' .. 5-4
WaterOonsumption
.... ...' 5-4
CycleCharts ..5-7
Special
WashCycles ......5-15
lnstallation
Installation
Reouirements
...
Built-in
Models
Convertible
Models
50HzOperatton
Installation
- Built-in
Models
Installation
- Convertible
Models
Installation
Accessories
....
Dishwasher
Warranty
Loading
Procedures
Common
Washability
Problems .. .. 5-33
WhatToDolf
. .....5-38
DoorSpring
Adjustment
Odor
from
NewDishwasher
Oversudsing
WinterizingDishwasher ......5-38
RustStains-Racks&Tub ...5-39
Dish
RackDamaged .. 5-39
WoodTop-Warpage.. ......5-39
5-18
5-18
5-18
5-19
5-20
5-21
5-24
5-25
5-28
5-30
5-38
5-38
5-38

COMPONENT
INDEX
SUBJECT PAGE
AdjustableUpperRack ...3-57
AirInletAssembly .
. 3-55
BackFlushArmandSeal
Rings .. 3-44
Baffle ......3-47
Base
Frame
(WC) .. 3-60
BaseFrame
(WU) .. 3-12
BearingAssemblyandPulley ....3-48
Belt.. ......3-52
BlowerAssembly ..3-53
BootSeal ... 3-48
Cabinet ....3-60
Cabinet,
WoodTop
and
Base
Frame .. .. 3-59
Casters ....3-60
Circulatinglmpeller ......3-47
Control
PanelAssembly ...3-1
ControlSwitches ....3-4
CupRack ...3-57
DetergentCupAssembly... .....3-29
Disconnect
Lever
and
ThumbRelease .
. 3-63
DishRackRoller ...3-57
DoorAdjustment ...3-23
DoorGasket
.... ..3-25
DoorHinge . 3-24
DoorLatch
Mechanism
andDoor Switch ... 3-27,3-28
DoorPlug ..3-25
DoorSprings.... ..3-23
Door
Strike . 3-17
DoorVentAssembly ......3-24
Drainlmpellerand"O"Ring .....3-48
DripFlange
and
Shield ... 3-14
DriveMotor.... ...3-50
Faucet
CouplerandPower Cord
(WC) ... 3-62,3-64
Fill
and
DrainHoses
(WC) 3-63
Fill
System ..3-34
Filter. ......3-43
FloatAssembly.. 3-37
Front,AccessandToePanels .....3-18,3-19
FronlCasterSupport .....3-60
Front
and
RearLevelingLegs .... 3-13
Gasket
for
Coupler
Inlet.. 3-64
HeaterHook. ..... 3-16
HeatingElement ... 3-15
HingePins. 3-13
fndicatorlights .....3-4
fnnerDoor .. 3-22
KnobandDial.. ....3-3
LowerDish
Rack .. 3-56
LowerWashArmBearing.... ...3-44
LowerWashArm
andCenterSpray
Nozzle .... 3-42
LowerWashArmSupport.... ...3-44
MicroprocessorBoard .....3-5
Nipplefor
Coupler 3-64
PowerCord. ......3-64
PowerModule .....3-45
Pumo
Cover ..... . 3-47

SUBJECT PAGE
RackTrackRemoval .....3-56
RackTrackShaftandRoller .....3-57
RacksandUpperRackTrackAssembly ......3-56
Rapid
AdvanceTimerMotor ... ... 3-3
Relays ......3-9
RetainerforFaucetCoupler .....3-61
Rinse
ConditionerDispenser ... .. 3-32
Strainer .. .. 3-43
Terminal
Box.. ....3-14
Thermostat 3-16
Timer ....... 3-2
TimerMotor ..3-3
TopFlangeandChannel
... .....3-17
TouchPad .. 3-6
Transformer..... ...3-7
Tub.. ......3-11
TubAssembly
... .. 3-10
Tublnsulation.. ...3-11
TubSupport ......3-12
Upper
DishRack
Upper
WashArm 3-56
3-42
UpperWashArmHose ... 3-42
Varistor .....3-8
Vent
Cover 3-39
WashSystem .....3-40
WaterCirculation ..3-41
Water
Valve .. 3-35.3-36
WoodTop
. .3-60

This service manual is intended fo assisf you in diagnosing inoperative conditions which may
develop in the "00", "0l"and "02" Jetclean model dishwasher.Electricalcomponenttesting is,
for themostpart, made withan appliance testmeter and consistsof checkingforopenor closed
circuits. Mechanical checks are made through sight and sound, along with the use of a volt-
wattmeter
andclamp-onammeter.
This manual is designed for the
construction of Maytag products. technician who is familiar with the operation and
The first and most importantstep of any
service
callis to accuratelydetermine
what
thecomplaint
is.Thisis best accomplished
by questioning
the customer,
findingout
what
the product
is or isn'tdoingand why
they feel a problem exists. Once the
complaint
is understood,using thismanual
becomes
relativelyeasy.
,;o
id.
..itt.
,t tY f-
rA\
til'l'l
ll
Thismanualcoversservice
procedures
andtroubleshooting
checks
for
the
following
models.
Many
of
theservice
procedures
andtroubleshooting
theydiffer,
itwillbe
noted.
"Microprocessor"
wu1000
thesameonall
models.
When
"00"
WUlOO
wu-wc300
WU5OO
WU-WC70O
WU9OO
"01"
WU1O1
wu-wc301
WU501
wu-wc701
WU901
"02"
wu202
WU-WC3O2
WU5O2
WU-WC702
WU9O2
checksare

Section1
covers
Electrical
TestEquipmentwhichis
available
fromThe
Maytag
Company
for
use
onthedishwasher.This
sectionalsocovers
general
useofthe
equipment,
in
addition
to
providing
specific
information
onamperage,
wattage
andresistancereadings
which
shouldbeseen.
Section 2 covers Electrical-Mechanical
Troubleshooting
and provides a list of possible
complaints.Find
thecomplaintwhich
you
feel
bestmatches
that
provided
bythecustomerand
turntotheappropriate
page(s).
You
willfind
alist
of
possible
electricalandmechanical
problems
for
thecomplaint,whichhave
been
listedin
their
orderof:
1. Easein
checking.
2. Probability.
Systematicallyeliminating
these
possibilities
will
allow
you
to
find
andcorrect
the
problem.
Section 3 coversService Procedures.
This sectionwill provide
information
on location of
components,
disassembly
and/or
reassembly
procedures,
the
purpose
and/orfunction
ofthe
part
and
in
some
instances
specific
checksto
be
made.
Section4
covers
Electrical
Schematics
and
Electrical
Flow
Charts.
Section5 coversGenerallnformation
suchasspecifications,
installationrequirements,
cycle
charts,
etc.

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Subject Page
OControl
PanelAssembly ...3-1
@fuUAsembly ..3-10
@Front
Access
and
ToePanels...3-18
@lnnerDoor ....3-22
@Door
Latch
and
Door
Switch
....3-27
@Detergent
Cup
Assembly ..3-29
ORinse
ConditionerDispenser...3-32
@rill
system ....3-34
@Wastr
System .
3-40
@Drive
Motor ...3.50
@BlowerAssembly ...3-53
@Racks
and
RackTrack ....3-56
-OCaOinet,
Wood
TopandBase Frame
...3-59
GD
Faucet
Coupler
and
Power
Cord
.
3-62
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MAYTAG
The equipment required
to service
Maytag
products
depends
largely
uponthecondition
encountered.
Locatinga malfunctionwill
often require the use of electricaltesting
equipment.
Thefollowingis
acomplete
list
of
electricaltestingequipment
made
available
by The MaytagCompany
for use on the
dishwasher.
ApplianceTestMeter
Volt-Wattmeter
Clamp-on
Ammeter
Motor
Test
Cord
CircuitTestboard
(D/W)
ELECTRICAL
COMPONENT
TESTING
Probably the easiest means of testing
electricalcomponents
is "continuity
testing"
with
aMaytag appliance
testmeter.
Continuity
isa completeor continuous
path
from one point in an electrical
circuit
to
another.Continuitytesting,as related to an
electrical
component,
is the checking of a
part for an "open"
or "closed" circuit.
A
continuity
checkcanbe performed
oncethe
product
beingtested
has
beendisconnected
f
rom its electrical supply and after
appropriatewireshavebeen removedfrom
the terminalsof the part being checked.
Following
manual
activation
of the part (if
required)
the
prods
ofthetest
meter
should
be placed on the respective terminals.
PARTNO.
38559
38519
38186
38183
38206
Sectfion1
Eilectrficoil
TestEquf,pnncnt
Needlemovementof the test meterwould
indicate
a completed
(closed)
circuit.
No
needlemovementwouldindicatea broken
(open)
circuitand a probable
inoperative
part.
Continuitytesting
is
a process ofeliminating
thoseelectricalcomponentsused
ina given
function
ofthe
product,
untilthe
inoperative
part
isfound.By
reviewing
the
list
of
possible
electrical
problems
underagiven condition,
and then performing appropriate
continuity
checksonthe
parts
involved,
you
should
be
ableto
locate
theelectricalcomponent
which
isinoperative.
Electrical
components
fallinto
two general
categories.
1. Loads
- Devices
that
use or consume
electricity.Examples
wouldinc!udedrive
motor,heating
elements,
lamps,timer
drive
motors
andsolenoid
coils.
2. Switches - Devicesthat control the
supplyofelectricitytothe
load
or
loadsin
a circuit. Examples include door
switches,timercontacts,selectorswitch
and
relay
contacts.
Continuitytestsof "load" devices
will
show varyinglevels of resistance
from
verylowfor
sometransformerand
motor
windings
to very high for some timer
motors and componentson electronic
control boards. Usually it is more
important
to knowif thereis a path
for
1-1

current
flow througha device
(continuity)
thanto know theexact
resistance
(ohms)
of
the
device.
Resistancevalues
are
includedin
this
guide
for
your
information.
Forthe most
part,
"loads"can be powered
byusinga motor
testcordto confirmopera-
tionor failure.Themotor
testcord,used
in
conjunctionwith a volt-wattmeterwill also
show
power
required
tooperatethedevice.
Continuitytestsof switcheswill
show
virtu-
ally no resistance
acrossclosedcontacts.
Resistance,
even low values indicates
burnedordirtycontacts
in
aswitch.
DRIVE
MOTOR
CHECKS
_
ELECTRICAL
Testing
of the drive
motorin this
guide
is
accomplished
throughtheuseofa
motor
test
38559
APPLIANCETESTMETER
TheMaytagAppliance
TestMeteris
purpose
tester
combininganAC-DC
testerwith
amulti-range ohmmeter.
The obviousadvantagesof being
check electrical
components
and
1-2
a multi-
voltage
able to
circuits
cord. The Maytag Company
makesa test
cordavailable
(Part
No.
38183)or onecan
beconstructed
in
ordertoperform
necessary
motor
checks.
MECHANICAL
CHECKS
Mechanical
problems
are
most
often
located
through
sightandsound.
Nevertheless,The
Maytag
Company
doesmake available
two
fine
pieces
oftestequipment
which
can
be
of
great
helpin
bothestablishingthe
presence
of a mechanical
problem
such
as
drag,bind
orslippage,and
provideyou
with
a general
idea
ofareas
tocheck.
Volt-Wattmeter
Clamp-on
Ammeter
PARTNO.
38s1I
38186
without
power
applied
isoneofthefeatures
oftheohmmeter.Multipleranges
allowaccu-
rate determination
of resistances of both
single components
(such as water valve
coils)
andentirecircuit
paths.
Resistanceis
measured
in
"ohms".
For
themost
part,
wewill
onlybeconcerned
with
continuity.
ls
there
apath or
not?Refer-
ences are made between
a "closed"
(con-
tinuity)
reading
andan
"open"
(no
continuity)
reading.
One
note,
when
youget
an"open"
reading,
try a higherresistancerange
(set-
ting).A veryhighresistance
appearsas an
"open"
on the lowerranges.Forbestaccu-
racy
always
"re-zero"
meterwhenchanging
ranges and/orthe physicalposition
of an
ohmmeter.

linevoltage.Theresistance
issolow
(about
114
ot
1
ohm)that
itwill
appear
tobeadirect
short.
CAUT|ON:
Always
besurethe
power
hasbeen
disconnected before making resistance
measurements. Failure to do so will result in
damage to
your meter!lnternalbafteriesprovide
all the power needed to make resistance
checks. Theyshould be checkedat leastonce
ayearandreplacedasneeded.
When checkingcomponents, external
wiring
should be disconnectedto eliminatefalse
readingsthroughexternal
paths.
SET
METERFORUSE ASFOLLOWS:
Calibrate
meter by touching test probes
togetherand turningadjustingdial until
meter reads "0" on green (top) scale.
Recheckcalibration
wheneveradjusting
dial
for
ohmssetting
is
changed.
(Replace
battery
if adjustment will not bringmeter
reading
to
"0".)
Selectthescale
mosteasily
read
and
place
test
probes
on respectiveterminals.
When
checking a switch the reading would
normally
beeither
openorclosed.
Areading
of70
onthe
Rx10scale
wouldfor
example
be
700
ohms
resistance.
The following chart shows typical
resistance values for some of the
components
found
on
Maytagdishwashers.
DISHWASHERS
Heatingelements
-
750watt 18
Ohms
Detergentcupba-metal
release
In
power
modulemodels,
thebi-metal
itselfis
the heater.Do not test theseunitswith
Timer
Motor
Kingston
timers
Advancerelay
coil
Advancemotor
Kingston
120VAC
Watervalve
solenoidcoil
24VDC
Watervalve
solenoidcoi
I
(wU1000
Only)
Rinse
cond.dispensersolenoid
Dishwasherdrive
motor
Main
winding
WhitetoBlue
Wash
-
White
to
White/Black
Drain
-
White
to
Red
Ohms
2700-3000
350
140-1
60
200
3000
900
2
4
4
1.
Theseresistances
are
notmeant
tobeusedas
the exact values to determinewhether a
component
is
good
orbad.
They
are
provided
so
that
you
mayhave
an
idea
ofthe
resistance
that
you
cansee
in
testingcomponents.
VOLTAGE
CHECKS
For
the most
part
thesechecks
will
consistof
taking
readings
at
thewallreceptacle
in
orderto
determinethe availability
of voltageto the
product. Voltage checks on individual
componentsofaproduct are
not
recommended
due to the possibility of electricalshock.
Component
parttesting
is bestaccomplished
throughcontinuitychecks
with
a38559
Maytag
appliancetest
meter.
NOTE:
Useofthe
meter
on
voltagehigherthan
the indicatedrange may cause permanent
damagetothemeter.Toprevent damage,
first
select
highestrange
andthen
lowertherange
forreadings
which
fallwithin
the
lower
scale.
SETUP
METER
FORUSE ASFOLLOWS:
1. Turn selector
knob
todesired
meterfunction
andappropriate
range.
2. Plug black lead into socket marked (-)
(black).
2.
1-3

3. Plug red lead into socket marked
(+
)(red).
GROUNDING
&POLARITY
The receptacle
used
for
allMaytag
products
operating
on 120VAC must be properly
grounded
and
polarized.
The power
cord
usedon the appliances
is
equipped
with a three
(3) prongpolarized
groundingplug
forprotection
againstshock
hazard
andshouldbe
plugged
directly
into
a
properlygrounded
and
polarized
receptacle.
Do not cut or remove the grounding prong
from this plug.
Itis
theresponsibility
ofthe
person
installing
the applianceto assure it is adequately
grounded
and
polarized
atthe
point
of
instal-
lation
taking
into
consideration
local
condi-
tionsand
requirements.In
cases
where
only
a two (2)prong
receptacleis available, it is
the
personal
responsibility
ofthecustomerto
have it replacedwith a properlygrounded
and
polarized
3
prong
receptacle.Allground-
ing
and
wiring
shouldbedone
in
accordance
with national
and local codes. USE OF
ADAPTERSIS NOTRECOMMENDED
BY
THE
MAYTAG
COMPANY.
lnsure That the Wall Outlet is Properly
Polarized and Grounded.
4. Place
test
leadsinto
receptacle
in
order
to
determinevoltage
available.
aaaooooooooaoooooooooaooo
't-4
=@.'
:E
=-@
120VOLTSAC 120VOLTS
AC
O
VOLTS
AC

USING
VOLTMETER
AS
A
CONTINUITY
TESTER
While
wenormally
thinkofcontinuity
testing
as onlyan ohmmeter
function,a voltmeter
canalso
beused.
The
primary
difference
is
that
power
isapplied
tothecircuit
under
test
andappropriate
caution
mustbeexercised.
The voltmeter is connected across the
component
terminals
with
the wiresstill
in
place and with power disconnected.
The
meterisset
forthe300
voltrangeand
power
isreconnected.
Avoltagereading
indicatesa
voltagedrop across
the component.
There
shouldbe no voltage drop acrossclosed
switch
contacts
or
fuses.
The voltmeterconnected
across
thermostat
terminals,
as an example,
will show no
reading
whenthe thermostat
is calling
for
heat and will show linevoltage
when the
thermostat
cycles.
Thistypeof
continuity
testing
is
anexcellent
method at locating questionable switch
contacts.
Any voltagedrop across closed
switch contacts indicates poor electrical
contact.
The resultant
internal
heatingcan
shorten
component
life.
USING
METER
-
TEMPERATURE
READINGS
(50"F.
TO
300"F.)
Dishwasher - Watertemperature
readings
are generally made by placing the
temperature
probe
under
hotrunning
water
from the faucet.(Allow
water to run for a
period
of time for accurate
reading.)For
actual reading of the water temperature
insidetheunit,
place
thetemperature
probe
in
thebottomofthetub,
following
the
initial
fiil.
SET
UPMETERFORUSE
AS FOLLOWS:
1. Turnselector
knobto
TEMP.
2. Insertblack
negative
leadoftemperature
probe into black socket marked (-)
(negative).
3. Insertred positive
lead of temperature
probe into red socket marked (+ )
(positive).
4. To calibrate
meter,
touch
black
plug
from
red positive
leadto blacknegative
lead
and turn calibration
dial until needle
aligns
withCAL.
Probe
isreadytouse
- readblue
scaleon
meter
facemarked
TEMP.
5.
1-5

38519
MAYTAG
Volt. Waltmeter
Since
the Maytagvolt-wattmeter
reads
true
power
consumed
and
line
voltage,itis
espe-
cially
useful
in pinpointing
appliance
mal-
functions.
Servicediagnosis
can often be
made
withoutremoving
so much
asthefirst
screw.
Each
product
hasa "normal"
wattage
rating
andthisnormalvalue
is usedas a basis
for
comparisonwith wattage readings being
taken
on a unit
undertest.Readingswhich
areabove
thenormal range
ofwattage
con-
sumptionindicate
anelectrical
problem
or
in-
creasedmechanical
load
onthemechanism
being
drivenby the motor.
Suchthingsas
wornparts
or bearingswill
showup as high
wattage
draw.
Wattage
readings
which
arelower thannor-
mal indicate
the unit beingcheckedis not
doing
theproper
amount
ofworkfor whichit
is designed.As an example,a beltwhich
slipsexcessively
willnotrequire
the
normal
power
from
themotor,resulting
in
a low wat-
tagereading.
1-6
Of equal importance is the abilityof the
power
line
to
supply
power
without
anexces-
sive voltage
drop. With the volt-wattmeter
bothvoltage
and wattage
drawcan be ob-
served
at the sametime,
duringthe initial
start
phase
oftheunit.Voltage
drops
of 10"/"
orlessfrom theratedvoltage
areconsidered
acceptableforproper
unitoperation.A line
voltage
dropin
excess
of 10"/"wouldindicate
a wiring
problem.
Larger
wiring
totheoutlet
mayhelp
solve
this
problem.
Where
power
to
themain
circuit
panel
also
dropsduringthe
start
phase,
thelocal
power
companyshould
be consulted.
A voltage
drop is oftenindi-
cated
by dimminglights
or slowstarting
of
motors.
SETUPMETERFOR USE
AS FOLLOWS:
Step 1. Before
connecting
the meter
to the
power source and with instrument
in its
operating
position,
zero both meters.
The
zero
adjusting
screwis located
at the lower
center
of eachmeter
cover.Turn
thisscrew
eitherleft
or right until
theneedle rests
over
zero on the leftedgeof each meter
scale.
NOTE:
Back
off
slightly
from
thefinal
setting
to minimize
pressure
on the zero adjusting
mechanism.
This
willextend
long
termstabil-
ity
ofthesetting.

Step 2. Setmeterrange
toggleswitchesfor
expected voltage and wattage to be
measured.You may want to refer to the
normalwattagereading
chartsfora general
ideaof wattage
switchsettings.
lf in doubt
set switch to highest range and reset if
voltage
or wattage levelsfallwithin
a lower
range.
lmportant:When
set
for
the300
volt
range
the wattmeterwillnot operateon the
0-500watt
setting.
Thisisfortheprotection
ofthemeter.
Step3.
Plug
thethree
(3)
wire
polarized
cord
into
a three
(3)
wire
polarized
andproperly
grounded
receptacle.
Step 4. To check wattage readings for
circulate
(wash)
or drainon undercounter
(WU)models,
connecta motor testcord to
the black and white leads of the wire
harness,
attheterminal
box.
Plug
the
motor
test cord into the receptacle
on the volt-
wattmeter. NOTE: On convertible (WC)
models,
simply
plug
the power cordof the
unit
into
the
volt-wattmeter
receptacle.
Wattage readingsfor "dry" may also be
checkedas aboveor if desired,the motor
test cord can be connected
directlyto the
heating
elementterminalsand
the
motor
test
cord plugged into the volt-wattmeter
receptacle.
Power surgessuch as that used in the
startingofamotorwillreadhigh
onthe
watts
scaleorpossibly even
"peg"
the
meter.This
momentary
surge
isnormal
andthe
meteris
designedtowithstand
thistypeof overload.
After
the initial starting
surge
is over,the
meterreadingwill decrease
as the power
consumedisreduced.
The currentcapacity
of the wattmeteris as
follows:
40
amps
momentary
(starting
surge)
20
amps
intermittent
(long
enoughto
get
a
stablereading)
10
amps
continuous
Avoid
overloading
themeter bydisconnect-
ing it immediatelyif wattagereadings
are
abovesafe levels. Loads
up to 1200watts
may
beconnectedthroughtheinstrument
for
anextended
length
oftime.Loads
measuring
between
1200
and
2000watts
shouldbedis-
connected
as soon as a readingcan be
made.
WATTAGE
READINGSINEXCESS
OF
2000wATTs
Wattage
beyondthe rangeof the 38519
Maytagvolt-wattmeter
canbe calculatedby
takinga current
(amps)
readingwith the
38186Maytag
clamp-onammeterandthen
1-7

multiplying
this
readingby
measured
applied
voltagetothe
load.
A
simple
formula
is
usedtocalculate
wattage
(Watts: AmpsxVolts).
NOTE: This formuladoes not take into
consideration
the
power
factorwhichwill
be
a number of one or less and indicatesthe
resistancevs. reactivenature
of the circuit.
Fortunately,in mostinstances
the loadwill
be mainlyresistive so that the calculated
valuewill
be
meaningful.
WATTAGES
DISHWASHERS
..OO''
JETCLEAN'"
DISHWASHER
Circulate
(wash) 7OO
-750
Drain
Dry*
Drain
Dry*
Sani
(Scrub)
Cycle
(wue00) 1560
-
1600
"01
" AND
"02"JETCLEAN'"
DISHWASHERS
(includes
wU1
000)
Circulate
(wash) 500
-
600
Each
circuit
inan appliance has
a "normal"
currentdrawwhichis an indicationof the
performance
of that circuit.Currentdraw
levels,
less
thanor more than
normal,
give
clues to malfunctions.
The clamp-on
ammeter
measures
thesecurrents
without
breaking the circuit by measuringthe
strength of the magneticfield developed
aroundeachconductor.Current
is readby
separatingtheconductorsandclampingthe
jaws
ofthe
ammeteraround
eachconductor
on which current is to be read. Low
amperage
readingsindicate
problems
such
as damaged
heating
elements,excessbelt
slippage, etc. High amperage readings
indicate
the unitbeingtested
is operating
underan increasedmechanical orelectrical
load.Worn
parts,
bearing
problems
or low
voltage will show up as low amperage
readings.
NOTE:
Overloadsonacircuitbreakeror
fuse
canbetracedtothe product beingtested
or
thecircuitbreaker
(or
fuse)
bycheckingthe
product's
currentdraw. lf the amperage
readingisless
thanthebreaker
reading,
the
breakeror
fuse
box
is
at
fault.
820droppingto300
750- 825
600droppingto300
750
Sani
(Scrub)
Cycle
(wu901
,9o2,1000)
1300
-
13s0
.Addan averageof 39wattswhen
blower
is
operating.Range
35
-
42.
1-8

USEOF
AMMETER
ON
DISHWASHER
1. Motor Current - The reading can be
takenat the leads on the motor start
relay
oratthetimer.
2. HeatingElement
Current
-Thereading
can be taken usingeither
leadto the
element.
3. Bi-Metal Switch
(Detergent
Cup)
- The
reading
can be takenat the detergent
cup
(BL5
or
27WH-OR)
AMPERAGE
CHART
canbedroppeddownto0-150VAC
range
by
depressingthe
redbuttononthesideofthe
meter.
MAYTAGJETCLEANTM
DISHWASHER
Wash*
Drain
(Start)
Circulate
Heat
Heat
Only
Heater
and
Blower
*Motor
currentlower
than
opendetergentdispenser.
}t
,rF
B
/.*a --,* _\
\
N:-.... a\
i,, \\
,r rr
,. ;\
t's
6.5amps
7.5
amps
12.5
amps
6.0amps
6.4amps
6 amps
willnol
The motor test cord may be used to
electricallycheckoperationof the various
electricalcomponentswhilestill
installedin
the unit.Testingin this mannermerely
determineswhetheror not the part will
f
unctionindependentlv
of other electrical
components.
In order to make accuratetests, proper
connectionof the motor test cord is very
important.With the aid of the following
drawings,
installation
of themotor testcord
may
bedone
quickly
andaccurately.
NOTE:Always
plug
testcord
into
a
grounded
receptacle.
VOLTAGE
CHECKS
WITH
AMMETER
Voltagereadingsmay
betakenbyusingthe
leads
supplied
with
themeter. Themeteris
preset
to read on the 0-300VAC
scalebut
1-9

DRIVE
MOTOR
TEST
Themotormay
bechecked
in
thedishwasheror
removed
andcheckedonthebench
Three
testleads
are
requiredtocheckoperationofthedrive
motor.
To
checkthe
motorforwash,hook
upthetestcordasshown.
To
checkthe
motorfordrain,hookupthetestcordas
shown.
DRIVE
\. MoroR
CENTRIFUGAL
:--o / START
SWITCH
/ w
START WINDINGS
a *o j DRAIN
--\
.WASH \
STARTWINDINGS
DRAIN
DRIVE
'\ MOTOR
I
l
aol
CENTRIFUGAL
--o uSTART
SWITCH
..MA;N
,Y,,
1-10