Maytag Commercial Neptune MAH14PD User manual

Maytag
Commercial
MAHl4PD
MAHl4PN
MAHl4PR
MAHl4PS
MAH2OPD
MAH2OPN
MAH2OPR
MAH2OPS
MAHzlPD
MAH21
PS
MAH2I
PN
MAH2IPR
Neptune
Gommercial
High
Efficiency
Washer
Service
Manual
nilAw
16022162
This
manualreplaces
(16010276)

GEN
ERAL
SAFEry
PRECAUTIONS
Information
contained
inthis
manual
is intended
forusebya qualified
service
technician
familiar
with
proper
andsafe
procedures
to befollowed
when
iepairing
an electrical
ap-
pliance.
Alltests
andrepairs
should
beperformed
byqualified
servicJ
technicians
equipped
withproper
tools
andmeasuring
devices.
All component
replacements
should
be made
by a qualified
service
technician
using
onlyfactory
approved
replacementparts.
lmproper
assembly
or adjustment
may
occur
if service
or repair
is attempted
bypersons
other
than
qualified
service
technicians
or if parts
other
than
approved
replacementparts
areused. lmproper
assembly
oradjustment
cancreate
hazardous
conditions.
There
canberisk
of injury
orelectrical
shock
while
performing
services
or repairs.
Injury
or electrical
shock
canbeserious
oreven
fatal. Consequently,
extreme
caution
should
be
taken
when
performing
voltage
checks
onindividual
components
of a product.pLEASE
NOTE: Except
as necessary
toperform
a particular
step
inservicing
a product,
the
elec-
trical
power
supply
should
ALWAYS
bedisconnected
when
servicirig
a product.
Further,
this
appliance
MUST
beproperly
grounded.
Never
plug
inordirect
wire
anap-
pliance
unless
it is properly
grounded
and
inaccordance
with
alllocal
andnational
codes.
Seeinstallation
instructions
that
accompany
theproduct
forgrounding
thisappliance.
16022162 02003
Maytag
Appliance
Sales
Company SAFETYPRECAUTIONS

INTRODUCTION
The
information
containedin
thismanual
pertains
totheservice
procedures
involvedin
maintaining
and/orservicing
theMaytag
horizontalwashers
"MAH14
,MAH20andMAH21"
models.
These
modelsarehorizontal
washers
intended
for
useincommerciallaundryfacilities.
_,.,,
, i- _ , tlr .,.*_r..L.',
:._!' r , :;. i
This
manual'can
beused
asaguide'to
assiit'inperformance,
instaildtion,
andlervicing
ofthe
product.
As
onotherfront
washer
models,
theimportance
ofproper
installation
cannot
beover
emphasized.For
additional
information,
refer
totheinstallationinstructions
that
accompanies
each
front
loadwasher.
This
manualis
dividedinto sections
covering
thewasher.Refertothose
sectionsfor
general
information.
lfadditional
information
isrequired,
contact
your
commercial
distributor.
Section1
- Covers
general
information
and
electricaltestequipment.
Section 2- Provides
information
onthelocation
ofcomponents
andservice
procedures.
The
purpose
andfunctions
of specific
componentswillbecovered.
Section3
- Providesinformation
onprogramming
andset-up
procedures.
Section
4- Covers
general
troubleshooting
using
alistof
general
complaints.
Section5
- Provides
specifications,
and wiring
diagraminformation.
Section6- Product
Definition:
Models
MAH21PD,
PN,PR,
PS
MODELS
COVERED
INTHIS
MANUAL
MAHl4PD
MAH14PN
MAHl4PR
MAHl4PS
MAH2OPD
MAH2OPN
MAHzOPR
MAH2OPS
MAH21PD
MAH21PS
MAH21PN
MAH21PR
16022162 @2003
MaytagAppliancesSalesCompany

CONTENTS
GENERAL
SAFEry
PRECAUTIONS
.........
\ INTRODUCTION
........ ...............ii
CONTENTS .............
iii
SECTION
1.
GENERAL
INFORMATION 1-1
HOWTO
ORDERPARTS ....................
1_1
REQUIREMENTS ................1_1
UNCRATING
INSTRUCTIONS ...........,..1-2
WASHER
INSTALLATION ...................1_2
TESTEQUTPMENT
............. ................14
ELECTRICALTESTS ...........1-5
Grounded
Components
.............. ....................1-5
Voltage
Checks ........:........ .............1-s
Wax
MotorCheck
- Door
LockMechanism ....1-5
WaterValve
Test.......... ...................1-5
Electrical
Test
Chart .....1-6
PLACEMENTOF
COMPONENTS .........1-7
(MAH14
Original
Modets) .............1-7
(MAH20
Models) .........1-9
(MAH20PN
Models) ..1-10
SECTION
2.SERVICE
PROCEDURES
CoNTRO1S.............. .........
2-1
Control
Console ..........2-1
\-- Microprocessor ..........2-1
TOUCH
PADASSEMBLY ..........,......2-2
WATER
LEVEL
SWTTCH ...................
2_2
AlRDOME
HOSE .............2_3
METER
CASE ...................
24
SERVICE
DOOR
&COIN
BOX
MONITOR
SWITCHES .......24
corNDRopAccEpToR
.............. .....24
FRONTPANEL .................2_5
TOPCOVER
.............. ........2_6
DOOR
ASSEMB1Y.............. ..............
2_6
CabinetVibration
Absorber ............2-7
Door
Latch
Loop........ ..................2-7
DOOR
LOCKMECHANISM............ ...2_7
DISPENSER
ASSEMB1Y............ .......2-8
(MAH14
Models) .........2-g
(MAH20
Models) .........2-8
DISPENSER
ASSEMBLY
FUNCTTON(MAH20
Modets) .....2-9
WATER
VALVE
(MAH14
Modets) .....2-10
WATERVALVE
(MAH20
Modets) .....2-10
FRONTWATER
FLUME
INJECTOR.............. .....2-11
REARACCESS
PANEL ....2-11
puMp
ASSEMB1Y.............. .............2_12
INSTALLATION
- PUMP
ACCESSORY
KIT .......2-12
16022162 @2003
Maytag
Appliances
SalesCompany Contents !il

RECIRCULATION
PUMP
(MAH20
Modets) ......2-j3
DETERGENTHOSE ........2-14
Drain
Hose......... .........2_16
SHROUD
ASSEM81Y............. ........2_16
BAFFLES ........2_17
DOOR
BOOT ..................2_17
OUTERTUB
COVER.............. .........2_18
'SPfN
BASKET
ASSEMBLY
w/BALANCE
RING ..........:..............:.::.....2-19
DRIVEPULLEY.... ............2_20
SPINNER
TUB
SUPPORT......... .......2-20
SEALSYSTEM ................2_21
oUTER
TUB
ASSEMBLY ................2_22
BEARTNGS .....2_22
couNTER
WETGHTS .....2_22
STRUTASSEM81Y.............. ...........2_23
BELT ...............2_23
MOTOR ..........2_24
DRIVE
MOTOR
MOTOR
CONTROL
BOARD
&TESTING ..........2-25
Motor
Phase
Test......... ................2-26
MOTOR
WINDINGS
CHECK ............2-27
Tachometer
Circuit
Diagnostics.............. ....2-29
UNBALANCE
CONTROL
SYSTEM
........... .......2.29
Tub
Displacement
Switch ..........2-30
StrutDisplacement
Switch ........2-30
lnertial
Unbalance
Switch ....,....2-30
Lower
Weight
Unbalance
Switch ................2-31
CabinetVibration
Sensor ..........2-31
MAH20PN
Enhancements......... .....2-32
RelayBoard ................2-32
SECTION
3. PROGRAMMING
AND
SET-UP
PROCEDURES
CoNTROLSET-UP
PROCEDURES
......... ...........
3_1
How
To
ReadThe
Display ............
3-1
HowTo
UseThe
Key
Pads
To
Program
TheContro1s.............. ......
3-1
STARTOPERATING
SET-UP ,............3-2
SET-UPCODES ................3-2
(Original
MAH14PD,
PS)........ .....3-2
(Enhanced
MAH14PD,
PS,
and
MAH14PN,
pR,
MAH20PD,
pS) ....
3-g
spEclALpRtctNG
DAYS ..................3_13
DfAGNOSTTC
MODE ......3_14
FieldDiagnostic
Cycte ................3-1b
Cycle
Credit ................3-15
Operational
Dibgnostic
Cycle ....3-15
Quick
Spin
Cycle
(MAH20
Models) ............3-15
DIAGNOSTIC
CODES .....3-16
HELPMODES .................3_17
HELPMODE
SYMBOLS ,3-17
HELPCODES ..3-18
GENERALUSER
INFORMATION ....3-19
tv
16022't62 @2003
Maytag
Appliances
SalesCompany Contents

TO
OPERATE
WASHER
............................ .......3_20
PROGRAMMING
INSTRUCTIONS
FOR
MAH2OPN
MODELS ...........3-20
Quick
Reference .........3-21
Flow
Chart ..................3-23
Slates ........3-24
Diagnostics
Mode ...:...................3-26
sEcTloN
4. TROUBLESHOOTTNG
.......... .........4_1
GENERALINFORMATION........... ......4_1
CoMPoNENTS.......... .......4_1
TROUBLESHOOTING
FLOW
CHARTS .............
4-2
FrELD
DTAGNOSTTC
CHARTS.............. ............4_15
DIAGNOST]C
CODE
GUIDES ..........4-17
SECTION5.
SPEC|F|CAT|ONS&SCHEMAT|CS....... ..........
$,1
WATTAGES
.............. .........5_1
MAH14WfRING
SCHEMATTC(Originat)
.............. ................5-2
WIRING
SCHEMATIC
MAHl4PD
MAHl4pS
(1st
Revision) ..................5-3
WIRING
SCHEMATIC
MAH14PD
MAH14pS
(2nd
Revision) ................54
wrRrNG
SCHEMAT|C
MAHl4pR
.............. ...........5_s
wrRtNG
SCHEMAT|C
MAHl4pN
.............. ............5_6
wtRrNG
SCHEMATIC
MAH2OPD
MAH20PS.............. ..........5_7
wlRtNG
SCHEMATIC
MAH20PR.............. ........
5_8
wtRtNG
SCHEMATICMAH20PN
.............. .........
5_9
SECTION
6.
MODELS
MAH21PD,
PN,PR,PS ...........6-1
PRODUCT
DEF|N|T|ON.............. ,......
6_1
PRESSURE
SWITCH ......6-1
DOOR
LOCK
SOLENOTD .................
6_2
DOOR
LATCH
HOOP ......
6-3
DOORLOCK
MECHAN|SM.............. .................
6_3
REARACCESS
PANEL ....6-3
PRESSURE
SWITCH .......6-4
suMP
covER .................
64
D|SPENSER.............. .......
6_5
MOTORAND
MOTOR
CONTROL
TEST ..........
6-6
TROUBLE
SHOOTING
GUIDE ..........
6-7
wtRtNG
TNFORMATTON
.......... .........
6_9
16022162 @2003
Maytag
AppliancesSalesCompany Contents

SECTION1. GENERALINFORMATION
\! HOW TO ORDERPARTS
, Replacement
parts
canbeorderedfromtheauthorizedMaytag
commercial
distributor
who
i sold
therncffne or from acommercialdistributor
designated
servicefirm.
IT
ISSTRONGLY
RECOMMENDEDTHAT
GENUINE
FACTOBY
REPAIR
PARTS
BE
USED.USE
OF
OTHER
PARTS
MAY
HARMUNITOR
CAUSEOPERATIONALPROBLEMS.
Whenordering
parts
fromyourdistributoror youare
contacting
him regarding
machinesafety
or service,
always
have
thefollowinginformationready:
Machine
Model
Number:
Machine
SerialNumber:
Installadon
Date:
Consult
the partscatalogfor correctpartsandfurther informationif necessarycanbe obtained
from your authorized
Mafitag
commercial
distributor. Parts
aresubject
to change
without
notice.
ttty Distributor is:
Installation
Date:
Distributol's
Name:
Address:
City,State,Zip Code:
Person
ToContact
I
Telephone
Number:
REOUIREMENTS
NOTE: Proper
installation is the responsibih . Standpipe
DrainSystemmustbeableto
tty of thepurchaser. accept11/2"
o.D. drain hose. Standpipe
heightof36'is recommended.
Checkpoints
for proper installation: NOTE: lf drain standpipe is in excegsof 5
' Properly
grounded electrical
oudetis feet above
floorlevel, instatlpump accessoty
required.Use
l5ampfuseorcomparable kit, partnumber22@2136.
circuit
breaker
for electrical
service.
16022162 @2003Maytag
Appliances
SalesCompany Ssction 1. Gonerallnformation 1-1

These
unitsarenot equipped
witha
siphonbreak,
andthe drainhose
mustbe
efevated
to aminimumheight
of 24,.A
36"high
standpipeisrecommended.
For
allinstallations,
thedrain
hose
must
be
supported
bythe drainhose
strap
onthe
back
oftheWbsher.
HotandCold
waterfaucets
should
be
within four (4)
feetof the back
ofthe
washer.This
allows
for quiix access
for
immediate
shut
off ofthewater.
Waterheater
should
beset
to deliver
a
minimumof 1200
(49oC)
hotwater
tothe
washer.
Do notstore
oroperate
washer
intem-
peratures
belowfreezing.This
can
cause
damage
to thepump,hoses
and
other
components.
Water
pressure
of20- 120PS.l.
isre-
quiredto fillthe washer
intheappropri-
ate
timeftame. Pressures
of less
than
20
PS.l.
may.cause
anextended
orexcep-
tionallylong
fill time. Refer
to the
troubleshootingsectionfor more infor-
mationregarding
a solution
for slowfill
situations.
Bestperformance
is obtainedwith the
washerinstalled
on asolid
floor. Wood
floor constructions
may needto be
reinforced
to minimize
vibration
from
unbalanced
loadsituations.Garpets
and
soft tile surfaces
are also contributing
factors
invibration
and/ormovement
duringthespincycle. Never
install
washer on platform orweak support
strusture.
UNCRATING
INSTRUCTTONS
NOTE: Thefollowingsfeps must
beper-
formed in the correct order to ease
uncrating.
1. Remove
thecarton
bycutting
only
marked
areas
ofthecarton.
CAUTION:
Hoses
are connected to the washez
2. Carefullyremove
anypackaging
materials
fromtheoutside
ofthewasher.lMpOR.
TANT DONOT ctrtthe red straos sccur-
ing the power cord and inlet hosesat
thistime. Theywill be removed later
during
installation.
3. Remove
theaccessory package
from
insidethetub.
4. Remove
thecratebottom from the
washer
WASHER INSIAL]ATION
1. Two
separateredshipping
straps
are
used
to secure
the machine
for shipping
purposes
andsecure
the power cord with
thewater inlet
hoses.Removal
ofthe
strapsmust beperformedin thefollow-
ing
sequence:
a. Locatethemetal
buckles
securingthered
straps
extending
throughslotsinthe rear
wall of the cabinet. The bucklesare
positionedinthe centerof the red straps.
Carefully
cut the red straps,
completely
removingthe metalbuckles.NOTE: Cut
the stnps as closeto the bucklesas
possible. Discard
the metalbuckles
(Figurel-ll:
b. Graspeachloose strap individually and
pull the strapto remove it from the cabi-
net. Discard
the strap(Figure l-2).
16022162 @2003Maytag
Appliance
Sales
Company Scaion 1. Generultnformation 1-2

Figure l-l
Figun l-2
2. Tipwasher slightly
forward. Loosen
rear
leveling
leglocknuts. Tipwasherback
slightlyto loosen
front leveling
leglock
nuts(Figure l-3).
3. Locatethe two l2l y2"
hex-head
shipping
bolts extendingup throughthe bottom of
the base
(Figure l4). Theshipping bolts
arenearthe centerof the base
toward
the front of thewasher. Remove
both
bolts,
freeing
the tub andsuspension.
Donotbealarmed
shouldthetub assem-
blyshift
whenthe lastbohisremoved.
Someshifting
ofthetub isnormal.
Figurel-3
Slide
thewasher into position
andcheck
the levelness
andstability of the washer.
lfnecessary
slide
thewasherout of
positionto eitherraiseor lower the
leveling
leg asrequired
to leveland
stabilizethe washer
securely
onallfour
legs. Slidethewasher
backintoposition
to confirm levelness
to the floor. When
satisfied
the washeris level,tightenthe
locking
nutsup against
the base
ofthe
washer.Thiswillsecure
the levelinglegs
in place.
4.
5.
6.
Figurc14
Install
the rubber
feeLfound inthe
instaflation
package,
on all4legs (Figure
,-:3).
Pullthedrainhose vertically
to thedrain
strap. Routethe drain hosethrough the
drainhosestrapon the backof the
washerandsnap intothe plastic hookof
the strap.
Install
gooseneck
endofthe drainhose
into
thedrainstandpipe.Besure the
connectionis not airtight betweenthe
drain
hoseandthestandpipe.Standpipe
must
beatleast24' high. 36' height
is
recommended.
Section1. Generallnformation 1-3
7.
't6022162
@2003Maytag Appliance Sales Company

Warning - Always shut off
elestrical power to tte unit
'
befor€begrnnng
p
nyservice
repairprocedures. '
ELECTRICAL
TESTS
Grounded Gomponents
Whenperforming
service
diagnostics,
re-
placements
andrepairs,
always
check
to
deterrnine
whether
allground
wireslinking
panel
andcomponents
arereattached
if
removed.
Voltage Checks
Generally,
these
checks
willconsist
oftaking
readings
atthewall receptaclb
to determine
the availability
of voltageto $e product.
Voltage
checks
on individual
components
of
aproduct
arenotrecommended
due
tothe
possibility
of electrical
shock.Component
part
testing
is best
accomplished
through
continuitychecks
with anAppliance
Test
Meter (SeeElectrical Test
Equipmem).
NOTE: Use
of the meter on voftagehigher
than the indicated range may cause
penna-
nent damage to the meter. To
preverrt
damage, first select the highe* rangeand
then lowerthe range for readingswhich falt
within the lowerscale.
Set uo meterfor useas
follows:
1. Turnselector
knob
to desired
meter
function
andappropriate
range.
2. Plug
blacklead
intosocket
marked
black
(-).
Plugredlead
intosocketmarked
red(+).
Placetestleads
intoreceptacle
to deter-
minevoltage
available.
Wax Motor Gheck- Door Lock
Mechanism
Check
thewaxmotorfor proper
ohms
resis-
tance.
Thischeck
should
be
madewith
the
elrctrfualsupply diseonrected
from the
washer.'
Remove
thewireharness
fromthe
waxmotorterminals
and
place
theohm
meter
probes
ontheterminals
ofthewax
motor.The
waxmotorshould
have
aresis-
tanceofapproximately
950-1100
ohms
at
room
temperature.
Water Valve Test
Check
thewatervalve
for electrical
continu-
ity. Thischeck
should bemade
with the
electrical
supplydisconneeted
from the
washer.Remove
thewireharness
fromthe
watervalve
terminals
andplace
theohm
meterprobes
on theterminals
of thewater
valve. The
water
valve
solenoid
coilshould
have
aresistance
between
500
- 1000ohms.
lfnoohms
are
shown
onthedisplay
ofthe
electricaltest
meter,
thesolenoid
coilhasan
openwinding
and
thevalve
should
bere-
placed.
ilr
3.
4.
16022162
@2003
Maytag
Appliance
SalesCompany Section
1. General
Intormstion 1-5