Technical Information- Dishwasher
MDB6600AWB MDB6600AWQ MDB6600AWS MDB6600AWW
MDB7600AWB MDB7600AWQ MDB7600AWS MDB7600AWW
MDB7650AWB MDB7650AWQ MDB7650AWS MDB7650AWW
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.
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, unless
testing requires power.
Specifications
MDB6600AW*
MDB7600AW*
MDB7650AW*
Benefits
MDB6600AW* MDB7600AW* MDB7650AW*
Wash cycles
Heavy Wash
Normal Wash
Light Wash
Rinse Only
Auto Clean
Drying System
Features
5
X
X
X
X
X
X
5
X
X
X
X
X
X
5
X
X
X
X
X
X
Power Source
Voltage AC
Amperage (Single Unit)
Frequency
Motor horsepower
Receptacle
Plug
Dimensions
Height−overall
Width
120 VAC
15 A
60 Hz
1/3
N/A
N/A
33 ½” to 35 ¼” QuietSeries 300™
X
X
23 7/8”
23 1/2”
QuietSeries 200™
*ToughScrub™
*Extra Rinse
*Sanitizer
2/4/6 Hour Delay
Start
X
X
X
X
X
Depth
Weight
Un-crated
X
X
X
X
X
X
65 lbs.
1-9 Hour Delay
Start
X
X
Control Lock
Energy Star
Active Vent Dry
Finer Filtration
Hard Food
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Disposer
Remaining Time
Countdown
Display
11 Touch Pad
Controls
X
X
X
X
*On selected models only
May 2004
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©2004 Maytag Services
Component Specifications
WARNING
!
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing,
unless testing requires power.
Illustration
Component
Limit Thermostat
Test Procedure
Results
= Closed
Close on Temperature drop @ 149°F
7°F (Temp) ......................................
Open on Temperature drop @ 164°F
4°F (Temp) ......................................
0 Ω
Infinite Ω = Open
Sensor/Thermistor
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) .....................................
Infinite Ω = Open
0 Ω
= Closed
Heater/Heating
Element
Measure resistance from ST1
Red/Black (Heater) to ST11 White
(Common) ..........................................
16 Ω
120v/60hz, 650 watts
5% in air, 830 watts
5% in coldwater
(This value assumes the high limit
thermostat is closed).
Drain Motor
120v/60hz
Measure resistance from
ST6 Gray (Drain) to ST4 Black
(Common) ..........................................
25 Ω
See section “Motor Connections and
Diagram” for wiring contacts.
May 2004
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Component Readings/Testing
WARNING
!
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing,
unless testing requires power.
Manual Function Test
Field Service Test
A Manual Function Test may be started by pressing the Normal Wash key
5 times followed by the Start key within 6 seconds.
A Field Service Test may be started by pressing the Heavy Wash key 5 times
followed by the Start key within 6 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:
“88” will appear in the display (if available*) and the following sequence of
events will occur:
Heavy Wash
Normal Wash
Light Wash
Rinse Only
Wash Motor
Drain Motor
Water Valve
Soap Dispenser (cycle once)
Rinse Aid (cycle twice)
Vent
SECONDS
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
106
5
120
180
120
4
Sanitize
Heated Dry
Heating Element
Water Valve
When a component is activated by pressing a specific keypad, the LED above
the keypad will be On. 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.
Time frame for Thermistor/Turbidity Sensor check & calibration may vary
slightly.
The Field Service Test will not repeat. The Heavy Wash LED will Flash during
the test mode. Indicator lights (except Heavy Wash and the Display) will
illuminate per Sales Floor Demo Mode. If the dishwasher door is opened
during the test, the test sequence will pause, and resume when the door is
closed. To the cancel test, press the Start / Cancel keypad.
Sales Floor Demo Mode
Press Extra Rinse keypad 5 times within 6 seconds. The LEDs will illuminate
in a progressive order until all are lit. All LED’s will stay on for 1 second then all
go off simultaneously. The display (if available) will begin at ‘50’ and sequence
down to ‘0’ at a 1 second interval and repeat until this mode is terminated. This
mode will repeat.
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
To cancel, press the Start / Cancel keypad.
Diagnostic Tips
started. The (See Note**) LED and one of the following:
To check control LEDs, enter Sales Floor Demo Mode. If control fails to
perform as described, replace control. To check control 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.
Turbidity Sensor - failure - Rinse Only LED
Thermistor - failure - Heavy Wash LED
Motor - high current - Normal Wash LED
Motor - low current - Light Wash LED
Memory Failure Heated Dry LED
-
* On select models
** On units with Front Controls only, this will be the Clean LED
,
on units with
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.
Top & Front Controls, this will be the Delay LED
Membrane Readings
(Front & Top Controls)
Membrane Readings
(Front Only Controls)
Connector
Measure Between
Pin 9 - Pin 5
Pin 9 - Pin 6
Pin 9 - Pin 7
Pin 9 - Pin 8
Pin 10 - Pin 5
Pin 10 - Pin 6
Pin 10 - Pin 7
Pin 11 - Pin 5
Pin 11 - Pin 6
Pin 11 - Pin 7
Pin 10 - Pin 8
Pin 11 - Pin 8
Pin 12 - Pin 7
Connector
Measure Between
Pin 10 - Pin 5
Pin 9 - Pin 5
Pin 9 - Pin 6
Pin 9 - Pin 7
Pin 9 - Pin 8
Pin 10 - Pin 6
Pin 11 - Pin 5
Pin 11 - Pin 6
Pin 11 - Pin 8
Pin 10 - Pin 7
Pin 10 - Pin 8
Pin 12 - Pin 8
Pin 9 - Pin 5
Pin 9 - Pin 6
Heavy Wash
Normal Wash
Light Wash
Rinse Only
Auto Clean
Start / Cancel
Delay
Heated Dry
Sanitize
Tough Scrub
Tough Scrub Plus
Extra Rinse
Model ID Jumper
J1
J1
J1
J1
J1
J1
J1
J1
J1
J1
J1
J1
J1
Auto Clean
Heavy Wash
Normal Wash
Light Wash
Rinse Only
Quick Wash
Heated Dry
Sanitize
Extra Rinse
Tough Scrub Plus
160° Wash
Model ID Jumper
Start / Cancel
Delay
J1
J1
J1
J1
J1
J1
J1
J1
J1
J1
J1
J1
J3
J3
*
*
An unpressed switch will read as an open circuit.
A pressed switch will read as 10 k ohms.
* On select models
An unpressed switch will read as an open circuit.
A pressed switch will read as 10 k ohms.
* On select models
Load Readings
Measure between:
ST1 (Heater) - ST11 (Dlb Neutral)
Result
16 ohms
Heater¹
Wash Motor
Drain Motor
Vent Wax Motor
Dispenser Wax Motor
Water Valve²
Thermistor
ST5 (Motor Common) - ST8 (Motor Main) 3 to 4 ohms
ST6 (Drain) - ST4 (Dlb Line)
25 ohms
1.2 k ohms
J6 Pin 1 (Vent) - ST4 (Dlb Line)
J6 Pin 3 (Disp) - ST4 (Dlb Line)
J6 Pin 4 (Inlt) - ST4 (Dlb Line)
J5 Pin 1 (Temp) - J5 Pin 4 (Neutral)
2 k ohms
1.1 k ohms
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 approximate values.
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May 2004
©2004 Maytag Services
Electrical Diagnostics
WARNING
!
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing,
unless testing requires power.
May 2004
5
16023212
©2004 Maytag Services
Motor Connectivity
WARNING
!
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing,
unless testing requires power.
Wire harness
Connection plug
Blue (Common)
Yellow
(Main)
Green (Ground)
(Start)
Red
1/3HP
120V/60hz, 3.2 amps, 3250 RPM
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©2004 Maytag Services
Wiring Diagram
WARNING
!
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing,
unless testing requires power.
BK
BK
DOOR SWITCH
(LI)
CIRCUIT BOARD
J6
PIN
1
J5
PIN
1
RD
BK
BK BK BU
GY
YL
WH WH
AQ TN
PU
BK
PU AQ RD RD
OR
BK
BK
RD
BK
AQ
AQ
PU
BK
BU
GY
YL
WH WH
TN
PU
BK
PU
OR
RD
BK
LI
OR
RD
RD
AQ
BK
BK
AQ
GY
WH
WH
BK
PU
WH
PU
TN
AQ
WH
TN
AQ
YL
YL
RD
RD
BK
RD
BK
OR PU AQ RD
MOTOR
CAPACITOR
BK
PU
FLOAT
SWITCH
GY
BK
GR
THERMOSTAT
BK
BU YL GR RD
GR
VENT
BK
RD
BK
BK
(TERMINAL
BOX)
N
BK
AQ
TN
DRAIN
MOTOR
SENSOR & THERMISTOR
OR
OR
WH
WH
GR
RD
BK
BK
RD
WH
BK
(TUB SHIELD)
GR
COLOR CODE
DISPENSER
BK
WATER
VALVE
BK
(HINGE)
AQ
BK
BU
BR
GY
GN
OR
PK
PU
RD
TN
WH
YL
AQUA
RD
RD
BLACK
BLUE
BROWN
GRAY
GREEN
ORANGE
PINK
PURPLE
RED
DOOR SWITCH
(N)
HEATER
WASH MOTOR
BK
BK
NOTE: SOME WIRES HAVE
STRIPES. STRIPED WIRES ARE
LABELED WITH THE SOLID
COLOR FIRST AND THE STRIPE
COLOR SECOND.
KEY
EXAMPLE: A RED WIRE WITH A
BLACK STRIPE WOULD BE
LABELED
WIRES NOT CONNECTED
WIRES CONNECTED
TAN
WHITE
YELLOW
Component Information
Wash Motor
Water Valve
1/3 HP motor,
120V / 60hz, 3.2 amps, 3250 RPM
Main wattage, 285 watts
Start wattage, 1115 watts
120V / 60hz, 7 watts
1.13 .10 gpm at 20 - 120 psi
Heating Element
Limit Thermostat
120V / 60hz, 650 watts 5% in air
830 watts 5% in cold water
SPST ¼” terminal switch
Close at 149° 7°F (65.0° 3.9°C)
Open at 164° 4°F (73.3° 2.3°C)
These parts are present on
models with 3 racks.
Thermistor
Resistance and tolerance:
10k ohms 3% at 77°F (25°C) and
2.4k ohms 6.5% at 140°F (60°C)
Wax Motors
Vent - 120V continuous duty ¼”
actuation stroke within 90 seconds
Detergent & Rinse Aid - 120V
incremental duty with ¼” actuation
stroke within 90 seconds
Capacitor
300V / 50 - 60hz
185°F(85°C), 15µf + 10% / -5%
Drain Motor
45 watts
May 2004
©2004 Maytag Services
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Cycle Chart
WARNING
!
To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing,
unless testing requires power.
16023212
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May 2004
©2004 Maytag Services
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