Maytag | ADB3500AW | Dishwasher — Technical Information

Dishwasher — Technical Information
Dishwasher — Technical Information
ADB3500AW*, MDBM755AW*, MDB7751AW*, MDB8751AW*,
MDB8951AW*
•
Due to possibility of personal injury or property damage, always contact an authorized technician for servicing or
repair of this unit.
•
Refer to Service Manual 16021814 for detailed installation, operating, testing, troubleshooting, and disassembly
instructions
!
CAUTION
All safety information must be followed as provided in Service Manual 16021814.
!
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing.
Benefits
ADB3500AW*
MDBM755AW*
MDB7751AW*
MDB8751AW*
MDB8951AW*
Wash cycles
Heavy Wash
Normal Wash
Quick Wash
Light Wash
Insta Wash
Auto Clean
Rinse Only
Features
Sound package
5
X
X
X
4
X
X
6
X
X
5
X
X
X
X
X
X
X
High Temp
Wash
Electronic
Controls
Sanitizer
Sensor clean
Water Filtration
Delay Start
Energy Star
Hard Food
Disposer
Child lockout
Touch Pad
Controls
Silverware
Location
Low rinse aid
indicator
X
X
X
X
X
X
Sofsound III™
QuietSeries™
200
QuietSeries™
300
QuietSeries™
400
X
X
X
X
X
X
X
X
X
100% Filtered wash
water
2,4 or 6 Hour Delay
Start
X
X
X
Micro-Fine Plus
Filtration
2,4 or 6 Hour
Delay Start
X
X
X
Micro-Fine Plus
Filtration
1-9 Hour Delay
Start
X
X
X
Micro-Fine Plus
Filtration
1-9 Hour Delay
Start
X
X
X
X
X
X
X
X
X
10
7
12
13
In door
Wash
Compartment
Wash
Compartment
Wash
Compartment
July 2005
©2005 Maytag Services
X
1
16026394
Component Specifications
!
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing.
Specifications
Power Source
Voltage AC
Amperage (Single Unit)
Frequency
Motor horsepower
Height−overall
Weight
Illustration
Value
120 VAC
15 A
60 Hz
1/3
Dimensions
33 ½” to 35 ¼”
71
Component
Dishwasher Motor
CCW rotation only
viewed from shaft
end.
1/3HP
120V/60hz, 3.2 amps,
3250 RPM
Main Wattage, 285
watts
Start Wattage, 1115
watts
Control Panel
Water valve
120V/60hz, 7 watts
1.13 ± .10 gpm at 20120 psi
Vent wax motor
120V with 1/4"
actuation stroke
within 90 seconds
16026394
Test Procedure
Measure resistance from
ST5 (Motor Common – blue) to ST8
(Motor Main - yellow) .........................
See Component Specifications/Motor
Connections for details.
Results
3 to 4 Ω
See Component Specifications/
Membrane Readings for
troubleshooting/pin-out instructions.
Measure resistance from
J6 Pin 4 Aqua (Float switch) to ST4
Black (Common) ...............................
Measure resistance from J6 Pin 1
Purple (Vent) to ST4 Black (Common)
...........................................................
2
1.1 k Ω
(This value assumes the float switch is
closed).
1.2 k Ω
July 2005
©2005 Maytag Services
Component Specifications
!
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing.
Illustration
Component
Dispenser wax motor
120V with 1/4"
actuation stroke
within 90 seconds
Limit Thermostat
Sensor/Thermistor
Test Procedure
Measure resistance from J6 Pin 3
Tan (Dispenser) to ST4 Black
(Common) .........................................
Close on Temperature drop @ 149°F
± 7°F (Temp) .......................................
Open on Temperature drop @ 164°F
± 4°F (Temp) .......................................
Measure resistance from ST1
Red/Black (Heater) to ST11 White
(Common) ...........................................
120v/60hz, 650 watts
± 5% in air, 830 watts
± 5% in 90°F water
Drain Motor
120v/60hz
45 watts
July 2005
©2005 Maytag Services
2kΩ
0Ω
= Closed
Infinite Ω = Open
10KΩ ± 3% at 77°F and 2.4 k Ω ±
6.5% at 140°F
J5 pin 1 - Orange (Temp) to J5 Pin 4 Red (Neutral) .......................................
Heater/Heating
Element
Results
Measure resistance from
ST6 Gray (Drain) to ST4 Black
(Common) ...........................................
3
Infinite Ω = Open
0Ω
= Closed
16 Ω
(This value assumes the high limit
thermostat is closed).
25 Ω
16026394
Component Readings/Testing
!
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing.
Manual Function Test
Field Service Test
A Manual Function Test may be started by pressing the Heated Dry key
5 times followed by the Start key within 8 seconds.
A Field Service Test may be started by pressing the Heated Dry key 6 times
followed by the Start key within 8 seconds. This test must be performed with
clean water to insure proper sensor performance.
The Normal Wash LED will Flash 3 times indicating manual test mode is
active. Specific keypads will turn on or off a component as follows:
KEY
Hi Temp Wash
Delay
Heated Dry
Cycles Select / Normal
First Press
Second Press
Third Press
Function
Wash Motor
Water Inlet Valve
Heating Element
LED
Hi Temp Wash
Delay
Heated Dry
No Action
Dispenser
Drain Pump
Heavy Wash
Normal Wash
Light Wash / China Crystal
“88” will appear in the display (if available*) and the following sequence of
events will occur:
SECONDS
106
5
120
180
120
4
The test will cancel 120 seconds after the last keypad is pressed. The display
(if available) will show ‘99’ until the remaining timeout period is less than 99
seconds. At this point it will countdown until the mode times out, is cancelled,
or another key is pressed. To cancel test, press the Start / Cancel keypad.
The time for the Thermistor check / Turbidy Sensor check & calibration may
vary slightly.
The Field Service Test will not repeat. The Heavy Wash LED will Flash during
the test mode. All Indicator lights (except Heavy Wash) will illuminate. If the
dishwasher door is opened during the test, the test sequence will pause, and
resume when the door is closed. To cancel the test, press the Start / Cancel
keypad.
Diagnostic Tips
To check control, LED’s and components, enter Field Service Test. If control
fails to perform sequence as described, and a fault is detected, determine
failure as described in the Field Service Test. If a load component failure has
been diagnosed, proceed to the Manual Function Test . To check individual
load components for proper operation, enter Manual Function Test. Follow
test procedure as described. Repair or replace component as needed.
The control has been designed to test the Sensor, Memory, and Motor. During
the Field Service Test, if a fault has been detected, the test will abort any time
after the motor current has been checked and 2 or more LED's will begin to
Flash. A Memory / Software Check will occur immediately after the test is
started. The (Delay / Delay 2 hr) LED and one of the following:
Note: The High Current or Low Current Motor Error may be detected during
a wash cycle selected by a consumer. If this happens, the control will go into a
30 second auto restart mode and shut down if the unit is not able to restart the
motor.
Turbidity Sensor - failure - Hi Temp Wash LED
Thermistor - failure - Heavy Wash LED
Motor - high current - Normal Wash LED
Motor - low current - Light Wash LED
Memory Failure - Heated Dry LED
Membrane Readings
(All Models)
Heavy Wash *
Normal Wash *
Light Wash / China Crystal / Gentle Wash /
Quick *
Rinse Only *
Auto Clean / Sensor Clean *
Heated Dry
Sanitize *
Hi Temp Wash
* On select models
Connector
J1
J1
Measure Between
Pin 9 - Pin 5
Pin 9 - Pin 6
J1
J1
J1
J1
J1
J1
Pin 9 - Pin 7
Pin 9 - Pin 8
Pin 10 - Pin 5
Pin 11 - Pin 5
Pin 11 - Pin 6
Pin 11 - Pin 8
Membrane Readings
(Front & Top Controls)
Connector
Insta Wash *
J1
Tough Scrub Plus / Super Scrub / Power Scrub * J1
160° Wash *
J1
Tough Scrub / Extra Wash / Hi Temp *
J1
Model ID Jumper *
J1
Start / Cancel
J3
Delay
J3
(Front Only Controls)
Connector
Cycle Select *
J1
Start / Cancel
J1
Delay
J1
Tough Scrub Plus / Super Scrub / Power Scrub * J1
Tough Scrub / Extra Wash / Hi Temp *
J1
Insta Wash *
J1
Model ID Jumper *
J1
FUNCTIONS / ACTIVE LOADS
Vent Wax Motor / Water Valve
Thermistor check / Turbidity Sensor check &
calibration - no loads active.
Wash Motor / Vent Wax Motor / Dispenser
Wax Motor
Wash Motor / Heater / Vent Wax Motor
Drain Pump
Water Valve
Measure Between
Pin 9 - Pin 5
Pin 10 - Pin 6
Pin 10 - Pin 7
Pin 10 - Pin 8
Pin 11 - Pin 7
Pin 12 - Pin 5
Pin 12 - Pin 7
Measure Between
Pin 10 - Pin 6
Pin 10 - Pin 7
Pin 10 - Pin 8
Pin 11 - Pin 7
Pin 12 - Pin 8
Pin 9 - Pin 5
Pin 9 - Pin 6
(Top Only Controls)
Insta Wash *
Tough Scrub Plus / Super Scrub *
160° Option
Tough Scrub / Extra Wash / Hi Temp *
Model ID Jumper *
Start Cancel
Delay
An unpressed switch will read as an open circuit.
A pressed switch will read as 10k .
* On select models
Connector
J1
J1
J1
J1
J1
J1
J1
Measure Between
Pin 10 - Pin 6
Pin 10 - Pin 7
Pin 10 - Pin 8
Pin 11 - Pin 7
Pin 12 - Pin 6
Pin 13 - Pin 12
Pin 13 - Pin 14
Load Readings
Measure Between
Result
Heater¹
ST1 (Heater) - ST11 (Dlb Neutral)
16
Wash Motor
ST5 (Motor Common) - ST8 (Motor Main)
3 to 4
Drain Motor
ST6 (Drain) - ST4 (Dlb Line)
25
Dispenser Wax Motor
J6 Pin 3 (Disp) - ST4 (Dlb Line)
2k
Water Valve²
J6 Pin 4 (Inlt) - ST4 (Dlb Line)
1.1k
Thermistor
J5 Pin 1 (Temp) - J5 Pin 4 (Neutral) See Component Info
Notes:
1. This value assumes the high limit thermostat is closed.
2. This value assumes the float switch is closed.
3. Results are approximated values.
16026394
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July 2005
©2005 Maytag Services
Electrical Diagnostics
7
8
BK
Pin # 1
PU
*Vent WM
(1.2K**)
Resistance Check Points and Values
2
3 4 5
6
RD RD AQ PU
Thermistor (thru harness only with
connector unplugged)***
10K* +/- 3% @ 77oF
o
2.4K* +/- 6.5% @ 140 F
Pin # 1
OR
Disp. WM
(2K**)
2
3 4
TN AQ
Water Valve
(1.1K**)
(float switch
must be closed)
8
YL
Drain Motor
(25**)
7
6
GY
Wash Motor
(3 - 4**)
5 4 3
BU BK BK
Heater
(14.5 - 16.5**)
(High limit t'stat must
be closed)
2
1
RD
BK
Always remove power to the unit
before performing any resistance or
continuity checks.
Stake Lug 11 10 9
WH WH
Use the "Manual Function Test" as described on the electrical schematic sheet to
check components before opening the door to perform continuity testing or replacing parts.
J6
1
To check continuity from ends of power leads to control board through door switches
(A white plastic latch must be inserted in the latch assembly for this test.)
> With one ohm meter lead connected to the white (neutral) power lead, you should have continuity at
stake lugs 10 & 11.
> With one ohm meter lead connected to the black (line) power lead, you should have continuity at
stake lugs 3 & 4, and pin # 8 on connector J5.
J5
2
Perform the resistance checks on the component(s) in question at the locations shown on the chart.
Circuit Board
3
* Select Models Only.
** Nominal value for ohms of electrical resistance of component only. These values will vary slightly
due to the additional resistance of the wire harness. Greater variation can occur if the component is
still warm from being energized during testing.
*** A resistor in the control board wired in parallel will result in an approximate reading of 4.0 k ohms
with connector J5 plugged in.
16026394
5
July 2005
©2005 Maytag Services
WARNING
!
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing.
Control Definition
!
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing.
Designed to provide a
longer cycle for
washing items with
heavy food soils.
water usage is 8
gallons.
Designed to wash
loads containing
dishes with normal
amounts of food
soils. Water usage
ranges from 3 to
6 gallons.
Designed for light
food soils. The
cycle ends with
a rinse and does
not include drying.
water usage is 4
gallons.
Designed to auto
select the number
of fills and length
of wash times
based on soil
level of dish
load. Water
usage ranges
from 3 to 8
gallons.
Delays the start of
the dishwasher
based on user
selection.
This option improves drying
results by turning the heating
element on and off during the
dry portion of the cycle.
Rinses dishes being
held until the dishwasher
is full, and another cycle
is selected. This cycle
helps reduce the
potential for developing
odors. Water usage
is 2 gallons.
This option monitors
cycles for sanitization.
This option raises
Temperature in the
Final rinse to 160° F
Light WashInsta WashAuto Clean-
Designed to wash loads containing dishes that are lightly soiled Water usage is 5 gallons.
Designed to wash loads containing dishes that are lightly soiled Water usage is 5 gallons.
Designed to auto select the number of fills and length of wash times based on soil level of dish load.
Water usage ranges from 3 to 8 gallons.
Tough Scrub- This option adds fills, heat and/or wash time to the wash cycle.
16026394
6
July 2005
©2005 Maytag Services
Control Definition/Motor Connectivity
!
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing.
(Start)
Wire harness
Connection plug
Green (Ground)
Yellow (Main)
Blue (Common)
1/3HP
120V/60hz, 3.2 amps, 3250 RPM
July 2005
©2005 Maytag Services
7
16026394
Cycle Chart
9 Minutes
RINSE ONLY CYCLE
DET
DISP
FILL
RINSE
1:36 min
5:00
1:46 max
FILL
1:36 min
1:46 max
Available Options:
No options are available with the Rinse Only cycle.
INSTA WASH CYCLE
20 Minutes - Min
51 Minutes - Max
FILL
1:36 min
1:46 max
DET
DISP
DRAIN
2:00
FILL
0:02
DET
DISP
DET
DISP
HEATED TEMP
WASH CHECK
22:00
140°F
DRY CYCLE (Front Only Display Models)
FILL
0:02
RINSE
AID
DISP
FILL
PRE
DRAIN
1:36 min RINSE
2:00
1:46 max 10:00
Note:
If Heated Dry is not selected, the heater will not be activated during the dry cycle.
DRY CYCLE (Front Top / Top Only Display Models)
FILL
0:02
DRY
CYCLE
30:00
DRAIN
2:00
FILL
0:02
RINSE
5:00
DRAIN
2:00
DRY
CYCLE
30:00
FILL
0:02
DRY
CYCLE
30:00
RINSE
AID
DISP
FILL
0:02
DRY
CYCLE
30:00
HEATER
HEATER
HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER OFF
ON
3:00
ON
ON
ON
OFF
ON
7:00
OFF
OFF
OFF
OFF
ON
or
or
1:00
1:00
1:00
3:00
1:00
3:00
3:00
3:00
3:00
1:00
1:00
9:00
Notes: If Heated Dry is not selected, the heater will not be activated during the dry cycle.
If 160° Option is selected, the first two minutes of heating is changed to 2 minutes of unheated at the end of
the dry cycle.
DRAIN
2:00
RINSE
5:00
HEATED
FILL
FILL HEATED TEMP
PRE
DRAIN
DRAIN
1:36 min
1:36 min RINSE CHECK
RINSE
2:00
2:00
1:46 max
1:46 max 20:00
145°F
10:00
DRAIN
2:00
HEATED
HEATED
FILL
FILL
PRE
DRAIN
DRAIN
PRE
FILL HEATED TEMP
1:36 min
DRAIN 1:36 min
2:00
2:00 1:36 min RINSE CHECK
RINSE
RINSE
1:46 max
2:00 1:46 max 10:00
10:00
1:46 max 20:00
145°F
SKIP?
RINSE
5:00
TC 1: If sensor detects lighter soil, the temp check will be 128 ° F
If sensor detects heavier soil, the temp check will be 140 ° F
TC 2: If sensor detects lighter soil, the temp check will be 140 ° F
If sensor detects heavier soil, the temp check will be 145 ° F
HEATED
FILL
HEATED TEMP
TEMP
PRE
DRAIN
RINSE
HEATED
FILL
HEATED WASH
1:36 min
DRAIN
CHECK
RINSE
2:00 1:36 min RINSE CHECK
AID
WASH
2:00 SEE NOTE 2:00 1:46 max
SEE NOTE
10:00
DISP
1:46 max 20:00
26:00
TC 1
TC 2
SKIP?
SKIP?
RINSE
5:00
HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER HEATER
ON
OFF
ON
OFF
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
3:00
1:30
1:00
1:30
1:00
1:00
1:00
1:00
1:00
1:00
1:30
1:30
1:30
1:30
1:30
9:30
FILL HEATED
FILL HEATED
HEATED
DRAIN
DRAIN
DRAIN
1:36 min RINSE
1:36 min RINSE
WASH
2:00
2:00
2:00
1:46 max 3:00
1:46 max 2:00
4:00
HEATED
FILL HEATED
FILL HEATED TEMP
DRAIN
DRAIN
WASH
1:36 min RINSE
1:36 min RINSE CHECK
2:00
2:00
140°F
10:00
1:46 max 10:00
1:46 max 15:00
Available Options:
Only the Heated Dry option is available with the Insta Wash cycle.
LIGHT WASH CYCLE/
CHINA/CRYSTAL CYCLE/
GENTLE WASH/QUICK WASH
81 Minutes - Min
82 Minutes - Max
FILL
HEATED DRAIN
FILL
1:36 min
PRE
2:20
1:36 min
1:46 max
WASH
1:46 max
8:00
SKIP?
Available Options:
Hi Temp Wash - This option boosts the final rinse temp check to 145°F.
Tough Scrub/Extra Wash/Hi Temp - This option adds an 8 minute pre-wash and 5 minutes of heated wash to the main wash.
Tough Scrub Plus/Super Scrub/Power Scrub - This option is the same as Tough Scrub but the main wash temp check is boosted to 145°F.
NORMAL WASH CYCLE
(97 Minutes - min)
(117 Minutes - max)
HEATED
FILL HEATED
FILL
PRE
DRAIN
1:36 min WASH
1:36 min
WASH
2:20
1:46 max 8:00
1:46 max
8:00
HEATED TEMP
WASH CHECK
140°F
25:00
This represents the portion of a cycle that MAY be
omitted. The determination of whether a segment
is skipped or not is made by input from the sensor.
SKIP?
RINSE
AID
DISP
Available Options:
Hi Temp Wash - Overrides the sensor’s decision to modify the temp checks and skip a rinse.
Tough Scrub/Extra Wash/Hi Temp - This option overrides the sensor’s decision to skip cycle functions / modify temp checks and adds an additional 5 minutes of heated wash to the main wash.
Tough Scrub Plus/Super Scrub/Power Scrub - This option is the same as Tough Scrub but the main wash temp check is boosted to 145°F.
HEAVY WASH CYCLE
(132 Minutes - min)
(133 Minutes - max)
DET
DISP
Available Options:
Hi Temp Wash - This option has no effect on this cycle.
Tough Scrub/Extra Wash/Hi Temp - This option adds an additional 5 minutes of heated wash to the main wash and a 10 minute heated pre- rinse.
Tough Scrub Plus/Super Scrub/Power Scrub - This option is the same as Tough Scrub but the main wash temp check is boosted to 145°F.
FILL
HEATED DRAIN
FILL
1:36 min
PRE
2:20
1:36 min
1:46 max
WASH
1:46 max
8:00
SKIP?
Notes
1. All times are approximate.
2. Temperature checks force a maximum 20 minute heating delay to reach the desired temperature.
3. The Auto Clean/Sensor Clean cycle definition gives the minimum and maximum possible cycle lengths. Actual cycle length and executed cycle functions will vary based on the sensor input.
4. Fill length varies between different models.
Temperature Options (Available on select models)
Sanitize: If the Sanitize option is available for a given cycle, it forces a 140°F temp check at the end of the main wash for the Light Wash, a 154°F temp check prior to the rinse aid dispense in the final rinse, and
adds 5 minutes unheated circulation prior to rinse aid dispense.
160° Option: If the 160° Option is available for a given cycle, it forces a 160°F temp check prior to the rinse aid dispense in the final rinse.
AUTO CLEAN CYCLE/
SENSOR CLEAN CYCLE
(94 Minutes - min)
(128 Minutes - max)
July 2005
©2005 Maytag Services
8
16026394
WARNING
!
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing.
Wiring Diagram
BK
DOOR SWITCH
(LI)
BK
WH
WH
WH
WH
RD
BK
RD
BK
WH
RD
BK
THERMOSTAT
WH
HEATER
BU
BU
BK BK BU
BK
BK
BK
BK
OVERLOAD
BK
BK
LI
GR
N
WH
DOOR SWITCH
(N)
KEY
W I R E S N OT C O N N E C T E D
WIRE S C ONNE CTED
YL
YL
GROUND
GY
GY
MOTOR
CAPACITOR
GR RD
YL
YL
YL
GR
GY
GY
AQ
BK
TN
AQ
FLOAT
SWITCH
AQ
TN
AQ TN
J6
CIRCUIT BOARD
WH WH
WH
WH WH
WH
RD
GR
PIN
1
AQ
WATER
VALVE
BK
BK
TN
TN
BK
BK
BK
BK
BK
DISPENSER
EXAMPLE: A RED WIRE WITH A
BLACK STRIPE WOULD BE
LABELED
RD
RD
DRAIN
MOTOR
GR
(HINGE)
(TUB SHIELD)
GR
(TERMINAL
BOX)
RD
NOTE: SOME WIRES HAVE
STRIPES. STRIPED WIRES ARE
LABELED WITH THE SOLID
COLOR FIRST AND THE STRIPE
COLOR SECOND.
WASH MOTOR
START
AQ
PU
J5
AQ
BK
RD
BK
OR
PU AQ RD RD
PU
BK
BK
RD
PIN
1
PU
PU
OR
OR
OR
AQ
AQ
RD
RD
SENSOR & THERMISTOR
AQUA
BLACK
BLUE
BROWN
GRAY
GREEN
ORANGE
PINK
PURPLE
RED
TAN
WHITE
YELLOW
COLOR CODE
AQ
BK
BU
BR
GY
GN
OR
PK
PU
RD
TN
WH
YL
OR
OR
BK
BK
16026394
9
July 2005
©2005 Maytag Services
MAIN
WARNING
!
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing.
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