Maytag FAV9800A, FAV7500A Technical Information

Page 1

Top Load Washer Technical Information FAV9800A*, FAV7500A*

• 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 16022808 for detailed installation, operating, testing, troubleshooting, and disassembly instructions.

CAUTION

All safety information must be followed as provided in Service Manual 16022808.

To avoid risk of electrical shock, personal injury or death; disconnect power before servicing, unless testing requires power.

WARNING

Page 2

Troubleshooting

WARNING

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

Will Not Start

• Plug cord into live electrical outlet.

• Check fuse or reset circuit breaker to outlet.

• Close lid and push the START/PAUSE button to start washer. The START/PAUSE LED should change from flashing to on continuously.

• Check to see if the washer is in a pause or soak period of the cycle. Wait briefly for cycle to advance.

• Check for restricted drain system.

• Check the lid, lid latch mechanism, and circuitry (see Will Not Lock).

Leaking

• Make sure supply hose connections are not

leaking. Check for rubber gasket damage due to over-tightening.

• Make sure end of drain hose is correctly inserted

and secured to drain facility.

• Check bottom of tub around the pulley. See

special instructions page 11.

• Check internal hose connections (fill & drain

systems, hoses & clamps).

• Check tub cover. Remove, reposition and reinstall

the tub cover seal. Seal seam must be at the top of the tub cover.

• Make sure water dispensing system on inner lid is

securely attached to lid.

• Make sure dispenser valve is securely attached to

mounting bracket.

• Check standpipe for leak. Wrap a dry rag around

the standpipe opening. If rag becomes wet leak is fault of home plumbing. Be sure the standpipe is capable of accepting the flow of water from the washer.

• Check the lid hinges if water is coming out behind

the lid.

• Check for bowing of lid where water enters

detergent dispenser.

Display Lights Up When Lid is Opened or Closed

• This is normal behavior.

No Tumble

• Start normal cycle with an empty machine and

allow a fill to check tumble.

• Fabric cycles such as NORMAL, DELICATES,

HAND WASH, & WRINKLE CONTROL only tumble periodically, every 60 seconds.

• Check for loose connections at machine control

board, motor control board and motor.

• Perform

Motor and Motor Control Test

• Washer does not tumble during most fills or during presoak.

• Washer with heat option does not tumble while heating.

• Check belt.

Will Not Spin

• During fill cycle – If machine tumbles and spins simultaneously replace clutch assembly.

• During spin cycle – If machine tumbles and spins simultaneously replace clutch assembly.

• Perform

Motor and Motor Control Test

• Check belt.

• Check that the machine control correctly senses that all 3 water levels are empty. See

Test

Board Input

• Tub Displacement Sensor disconnected, or loose wire.

No Water Fill

• Go to

No Fill Test

• Check to make sure water supply is turned on fully.

• Normal water level is 1 to 7 inches inside the spinner.

• Check electrical circuit and connections at the water valve, and pressure switch.

• Check for kinks in inlet hoses.

• Check for clogged inlet screens.

• Visually check hot and cold separately for fill.

• Check for low water pressure. May be dependent on pressure entering home. Variations may occur due to usage in the home at the time machine is used.

• Check for frozen pipes and hoses.

Tub Full of Suds

• Check for restricted drain system.

• Check for loose wire connections at control board and pump.

• Perform

Motor and Motor Control Test

• Use high efficiency or low sudsing detergent specially formulated for front load washers.

• Run the clothes washer through another complete cycle using the coldest water and no detergent.

• Reduce detergent amount for that specific load size and soil level. Towel loads have a minimal amount of soil present and typically create more suds.

• Check to see if belt is off motor and pulley.

Wet Clothes

• Very small clothes loads can cause unbalanced loads - add additional towels.

Page 3

Troubleshooting

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

• Excessive suds may have been present.

• Check Tub Displacement Sensor connection and main harness connector at machine control board.

• Check Tub Displacement Sensor for 0 to 3.0 Volts DC output voltage between ground and the board input. Check for 12 Volts DC input voltage between the ground and the board output. Only check for voltage at the Tub Displacement Sensor. Do not perform a continuity check. See Tub Displacement Sensor Diagnostics (pg 10).

• Excessive motion was detected in spin (dc or LL) Run Quick Spin Test with an empty tub to check Tub Displacement Sensor and Machine Control Board.

• Check for restricted drain system.

• Perform

Will Not Lock

• Lid not all the way closed or not properly aligned.

• Check electrical connections at lock assemblies, machine control board, and Motor Control Board.

• Magnet missing. (Located on the back side of dispenser assembly inner lid, front Left corner).

• Laundry load is too large to close lid.

• Check system relay for welded contacts.

(Diagnostic code 34) Disconnect power. Continuity between p.6 pin 1 to p.8. pin 1 at the Machine Control Board connector.

• Go to Lid Lock Test.

• Make sure inner lid is properly assembled to lid.

• Make sure door lock bumpers are fully seated to top cover.

Will Not Unlock

• Press Off. The motor control is not responding if it takes 4 minutes to unlock. The motor control is either bad or disconnected.

• Unplug and reconnect power cord. Wait 20 seconds for machine to unlock.

• Check lid locked switch circuit. Circuit should be closed at machine control.

input/output chart)

• Check for loose electrical connections at lid lock and at machine control board.

• Push lid closed to make sure nothing from inside is pressing against it, which may keep it from unlocking.

• Perform Motor and Motor Control Test section).

• If necessary, remove clothes by disconnecting power to washer, and open top cover with a putty knife.

Motor and Motor Control Test

(See board

Motor and Motor Control Test

. (see

WARNING

Will Not Drain

• Check for restricted drain system.

• Check low, medium, and high water fill completion. Go to

• Check for 120 VAC at the pump when a spin cycle is selected < 550 rpm.

• Go to test.

• In cold climates check for frozen Drain Hose.

• Too Hot/Too Cold: This washer uses a reduced amount of water, while the control board meters the incoming flow to regulate the actual temperature of the water in the tub. This may appear to be significantly warmer/cooler than expected.

• Check that both faucets are on fully.

• Make sure the temperature selection is correct.

• This washer will compensate for reversed fill hoses. See Hose Reversal Detection.

• Make sure water heater is set to deliver a minimum of 120°F (49°C) hot water at the tap. Also check water heater capacity and recovery rate.

• If the water heater is located a long distance from washer, the water line may need to be purged prior to starting wash cycle.

• Disconnect inlet hoses and clean screens.

• The washer will need to go through a Hot / Cold cycle if the fill hoses were previously installed incorrectly and then corrected.

• Check Water Valve Thermistor. Resistance at room temperature is 61700 ohms.

input/output chart)

Noise / Cabinet Hits

• Level the machine.

• Check sensor (refer to Tub Sensor Test).

• Check Strut and Strut Isolator for proper operation.

• Check for Diagnostic Code “10”.

No Fill Test

Board Output Test

Wrong Water Temperature

and perform pump out

(See board

Page 4

Troubleshooting

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

Remove A Favorite Cycle

If the consumer wants a favorite cycle removed, see below:

Service Mode

Service Mode enables service personnel to verify the operation of the washing machine and diagnose problems. Service Mode can be entered in the middle of any wash cycle without interrupting the cycle. While in Service Mode, the technician can cancel the current cycle, set a continuous running mode, start a variety of special service tests and view diagnostic displays.

Enter / Exit Service Mode

Help

and

To enter Service Mode press the for three seconds or until the control beeps. The motor speed will be displayed when started (motor not running display will be 0). Diagnostic codes will be shown and the

System Check

Service

Back

utility can be

WARNING

keys

started. The present state of the machine will not be changed. (i.e., the current cycle in progress will not be interrupted and only the display will change).

To exit: 1) Press or 3) unplug the machine.

The following steps summarize special tests and features available in Service Mode, along with methods of activation and cancellation.

Accessing Service Tests and Diagnostic Features while in Service Mode.

exit service mode

, or 2) press

Off

Page 5

Troubleshooting

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

User Interface Enter User Interface and follow the directions on screen. This test will check the Membrane Pads and Touch Screen. The Membrane Pad and Touch Screen Test must be completed in approximately 10 seconds or a failure will be shown on the display.

Quick Spin Test

While in Service Mode, select the option. Quick Spin test steps are as follows:

1) Lock the lid.

2) Spin to index speed 90 rpm and hold for 60 seconds. Pump drains machine.

3) Spin to index speed 150 rpm and hold for 6 seconds.

4) Spin to index speed 350 rpm and hold for 6 seconds.

5) Spin to index speed 550 rpm and hold for 6 seconds.

6) Spin to index speed 700 rpm and hold for 6 seconds.

7) Spin to index speed 850 rpm and hold for 6 seconds.

8) Spin to index speed 1000 rpm and hold for 6 seconds.

9) Coast down to 0 rpm.

10) Unlock lid.

Quick Spin Test

WARNING

Hold Quick Spin Test

If the

Hold at this step

Quick Spin test, the machine will hold at the next highest index speed for up to 30 minutes.

option is selected during the

Page 6

Troubleshooting

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

System Check

Select the desired output to test. The system relay must be on to test components. The highlighted area indicates the state of each output.

Note: When the Neptune TL is plugged in, the

Machine Control Board will check the lid latch mechanism every 20 seconds. If found to be locked with no cycle running, the Control Board will send a signal to the switch to unlock the lid.

WARNING

If motor does not run; Check for 120 VAC at the motor control board harness between L1 and Neutral.

Illustration

If voltage is present, then problem exists with the

motor and motor control system.

• Check for loose electrical connections at motor, and motor control board.

• Check phase windings of the motor.

Illustration.

motor control board.

If voltage is not present;

• Check for loose electrical connections at Machine

Control Board or broken wires in harness.

See

Ground Line 1 Neutral Harness

Motor Harness

JP4 Harness

Motor Control Board/JP4Connector

See

If motor windings are good, replace the

Page 7

Troubleshooting

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

Service Cycle This will be a quick check of all systems.

1. Lid locks.

2. Press Start\Pause.

3. Lid unlocks.

4. Open lid.

5. Close lid.

6. Press Start\Pause.

7. Lid locks.

8. Cold water bleach fill.

9. Bleach fill. Advance to next step if water is not connected to machine.

10. Tumble using 48 rpm tumble for 10 seconds.

11. Hot fill.

12. Fabric softener fill. Advance to next step if water is not connected to machine.

13. Drain.

14. Spin to 150 rpm.

15. Spin to 350 rpm.

16. Spin to 850 rpm.

17. Pump cycles on and off.

18. Coast to 0 rpm.

19. Lid unlocks.

If a failure occurs during the test, an error screen will appear. Select OK to continue. The test will continue depending on the nature of the failure.

WARNING

Display Diagnostic Codes

Enter Service Mode to display diagnostic codes. Diagnostic codes will be shown in the right pane as shown.

Access Other Features

To view details about the software version and the total cycle count, select the diagnostic code portion of the screen. You will also be able to view details about the number of cycles since a diagnostic code occurred, if a code is logged.

Page 8

Troubleshooting

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

Diagnostic Codes

Diag. Code

Description Trigger Action to be

1 No Drain

The lid fails

3 No Fill

to unlock

The lid fails

to lock

Continuous unbalanced circuit. Out

of balance

circuit

Locked Rotor forcing a shut down.

Water level

sensor fault.

Unbalance

or cabinet hit

detected

during final

spin, which

prevented

the spinner

from

exceeding

500 rpm

The water

level fails to

drop below the Low level before a spin

Lid failed to unlock after

multiple

attempts

Total fill 14

minutes

exceeded.

Lid failed to

lock after 11

attempts

See section

for unbal.

loads.

(During spin

only)

Locked rotor

is still locked

after 10

attempts.

Input signal

from water

level Sensor

is out of

range,

Washer will

beep and

pause the

wash cycle.

Less than 500 rpm due to an

unbalanced

load.

Go to "Will Not Drain" Troubleshooting Section

Go to "Will Not Unlock" Troubleshooting Section Go to "No Water Fill" Troubleshooting Section Go to "Will not unlock" Troubleshooting Section

Go to "Wet Clothes" Troubleshooting Section

Go to "Motor

Control Board Output Test"

Displays "LE" Go to

troubleshooting”.

Go to "Wet Clothes" Troubleshooting Section"

taken

“No water fill

WARNING

Diag. Code

15 Stuck Key

Description Trigger Action to be

Go to "Clear diagnostic codes"

Disconnect and

Will not

remember

machine

settings

High speed

not achieved

due to

torque.

The lid was not opened

after

completed

wash cycles.

Detected lid

lock switch

open during

cycle when

not

expected.

Detected lid switch open during cycle

(when not

paused).

Lid is locked

at start of

cycle

Difficulty in

reading

memory

Detected a

key pressed more than 75 seconds. The

key is

assumed to

be stuck.

Speed less

than 400 rpm

during a main

wash cycle.

Did not sense

lid open after the last three

completed

cycles.

Open lid lock

switch with

motor

running.

Detected lid

sensor switch

open and the

lid locked

switch locked.

Lid lock is

locked and a

user tries to

start a cycle.

reconnect the washer power cord at power supply outlet. If condition still exists, replace machine control board.

Go to "Membrane Pad Check" Check connection of keypad to control board. Replace console if necessary.

Go to "Wet Clothes" Troubleshooting Section"

Customer may have tried to repeat wash cycle without opening the lid. Go to "Lid Lock Test" Check for loose wire connections. Clear the dia code and recheck; if reoccurs, perform

Diagnostic Motor/Motor Control Board test

Check for faulty motor relay on the machine control board.

Go to "Lid Lock Test" Troubleshooting Section

Go to "Will Not Unlock" Troubleshooting Section

taken

nostic

Page 9

Troubleshooting

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

Diag. Code

Exit Service Mode

To exit: 1) Press or 3) unplug the machine.

After five (5) minutes of inactivity (user key presses) in Service Mode, the machine will exit the Service Mode and resume normal operations. Pressing the Off key will completely exit Service Mode. If a cycle is running, cancel the cycle. Pressing the Start/Pause key while running a test will pause the individual test, while remaining in Service Mode. A power loss during Service Mode will cancel this mode.

Hose Reversal Detection and Correction

The washing machine has diagnostic features that determine if the hoses are reversed on the first complete cycle after power up. The control board monitors water temperatures during the wash cycle.

Description Trigger Action to be

Motor high

RPM

detected two

times

Motor tach

signal exists

without

motor

running

Water valve

thermistor

failure

Welded

system relay

Washer not

operating

due to tumble not functioning

Motor tach

nal is seen

at maximum

speed.

Tach signal

exists without

torque input.

(Abnormal

condition

only)

Abnormal

h/low temp

or ohm

resistance

seen

Change of

state of the

relay

Load bound

up.

exit service mode

Replace motor control board.

Go to "Wrong

Water Temperature"

Troubleshooting Section Disconnect power. Continuity between p.6 pin 1 to p.8. pin 1 at the Machine Control Board connector. The washer is unable to complete its cycle. The paddles cannot move. To continue, separate and redistribute the load, then press “start/pause”.

, or 2) press

taken

WARNING

Off

The control system is capable of detecting hot and cold water intake hose reversal and will change the fill temperature as necessary after the first cycle. The control system stores and retains hot and cold water intake hose reversal information through a power-down.

The system reverts to factory defaults for the cold and hot water valves and cancels hose reversal detection if a diagnostic code 28 has been logged in a cycle. See “Wrong Water Temperature” in the trouble shooting tips, at the beginning of this document for more information.

Torque Specifications

Pulley clutch Bolt 96 in. lbs.

Clamp Ring 1520 ft. lbs.

Page 10

Troubleshooting

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

Spinner Support Shaft Nut 64-80 ft. lbs. Special wrench required.

Tub Displacement Sensor Diagnostics CAUTION: Do not perform continuity check directly on

Displacement Sensor due to the potential for damaging the microprocessor chip in the sensor.

1. Enter the Service Mode by pressing the

Back

keys for three seconds.

2. Press

3. Push tub to back right corner so sensor extends

4. Pull tub to front left corner and push down so

NOTE: Moving the sensor midway between mark #1

System Check

beyond the #2 mark molded on slider. Display will show “tub unbalance”.

sensor collapses to before the #1 mark molded on slider. Display will show “tub unbalance”.

and mark #2 represents normal operation. Display will show “no unbalance”.

on the display

#2 Mark

#1 Mark

Help

Tub Displacement Sensor

WARNING

Component Diagnostics NOTE: Unplug lower harness connector under

and

Insertion Side Lower Harness Connector

console and test from wire insertion side.

Component

Check

Drain Pump 2 and 11 WH

Pressure

Switch Low

Level

Pressure

Switch Med

Level

Pressure

Switch High

Level

Pin #8

Pin #14

Pin Wire

Color

and

RD/BK

4 and 13 BR and

RD/W

13 and 14 PU and

RD/W

1 and 9 GY/BK

and

YL/BL

Pin #1

Pin #9

Range

0 to 30

Ohms

0 to 20

Ohms (no

water in

machine)

0 to 20

Ohms (no

water in

machine)

0 to 20

Ohms (no

water in

machine)

Page 11

Troubleshooting

WARNING

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

Special Instructions Water Leak Around Pulley On Tub Bottom

3. If there was no water in the Transmission or around the top of the Input Shaft, it is likely the

Water leaking around the pulley on the bottom of the tub, check the following:

1. Remove the Transmission. The Transmission should be approx. 1/3 full of oil. The oil in the Transmission should be thick, similar to a high viscosity motor oil. Tip the Transmission slightly, the oil should move slowly. If the Transmission is nearly full or if the fluid is very thin and moves quickly, the Transmission has water in it. Replace the Transmission, O-Ring, Spinner Support, Tub Seal and Outer Tub.

2. If no water is inside the Transmission, check the integrity of the O-Ring. Look for signs of water or rust on and around the Input Shaft. If the O-Ring is bad or there are signs of water or rust around the input shaft, replace the spinner support, tub seal and the outer tub.

Titan LED Washer Control Board Inputs Table

Item

Water Valve Thermistor Power Cord

Neutral 120 VAC Input to some relays

Ground Chassis

Lid Lock Switch

Lid Closed Switch This switch senses if the lid is

User Interface Membrane switch key pad 0 - 12 VDC Digital Input to Micro-

Tach from Variable Speed Motor Control

Pressure switch

Medium water level 0 - 12 VDC Digital Input to Micro-

High water level 120 VAC Input to Micro-

Description Voltage Input type Input to Where Comments

0 - 3.3 VDC Analog Input to Micro-

Line 120 VAC Input to some relays

This switch senses if the lid is locked

closed

Tach signal 0 - 12 VDC Digital Input to Micro-

Low water level 0 - 12 VDC Digital Input to Micro-

ground 0 - 12 VDC Digital Input to Micro-

0 - 12 VDC Digital Input to Micro-

water was leaking through the Tub Seal. Replace the Outer Tub and Tub Seal. Inspect the Spinner Support for damage around the Tub Seal area. Replace the Spinner Support if it is damaged.

4. The Clutch Assembly should be inspected for signs of water or oil contamination. Clean Clutch Assembly as needed. Replace Clutch Assembly when water or oil contaminates the roller clutches.

Note: Oil in a new Transmission is clear. During operation, the oil will turn a dark color caused by the special compounds in some of the bushings.

processor

processor and safety circuitry

processor and system relay coil

processor

processor and safety circuitry

processor

processor and some relays

Closed when lid is locked

Closed when lid is closed

Open when key is not pressed

Closed when not satisfied Closed when not satisfied Closed when not satisfied

Page 12

Component Testing Information

To avoid risk of electrical shock, personal injury or death; disconnect power before servicing, unless testing requires power.

Membrane Pad Continuity Checks

Unplug ribbon connector from display board. Touch probe of meter to the appropriate pin numbers listed in the chart. Meter will show infinite unless the appropriate key is pressed.

Button Pin Number

Home 5 & 3 Favorites 6 & 3 Back 5 & 4 Off 5 & 7 Start/Pause 6 & 7 Help 6 & 4 Stain Brain 5 & 8 Cycle Library 6 & 8

Note: When the Neptune TL is plugged in, the Machine Control Board will check the lid latch mechanism every 20 seconds. If found to be locked with no cycle running, the Control Board will send a signal to the switch to unlock the lid.

Pin # 2

WARNING

Page 13

Wiring Schematic

To avoid risk of electrical shock, personal injury, or death, disconnect power before servicing, unless testing requires it.

9800

WARNING

Page 14

Wiring Schematic

To avoid risk of electrical shock, personal injury, or death, disconnect power to washer before servicing, unless testing requires it.

7500

WARNING