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W10216189A

 

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TECH SHEET - DO NOT DISCARD

PAGE 4

TROUBLESHOOTING TESTS

NOTE:

These checks are done with the dryer

unplugged or disconnected from power.

TEST #1

Supply Connections

This test assumes that proper voltage is present at

the outlet, and visual inspection indicates that the

power cord is securely fastened to the terminal

block (electric dryer) or wire harness connection

(gas dryer).

ELECTRIC DRYER:

1.

Unplug dryer or disconnect power.

2.

Remove the cover plate from the top right

corner of the back of the dryer. See figure 3.

3.

With an ohmmeter, check for continuity

between the neutral (N) terminal of the plug

and the center contact on the terminal block.

See figure 4.

If there is no continuity, replace the power

cord and test the dryer.
If there is continuity, go to step 4.

4.

In a similar way, check which terminal of the

plug is connected to the left-most contact on

the terminal block and make a note of it. This

will be L1 (black wire) in the wiring diagram.

See figure 4.

When this is found, go to step 5.
If neither of the plug terminals have

continuity with the left-most contact of the

terminal block, replace the power cord and

test the dryer.

5.

Access the machine control electronics without

disconnecting any wiring to the control board.

See Accessing & Removing the Electronic

Assemblies, page 9.

6.

With an ohmmeter, check for continuity

between the L1 terminal of the plug (found in

step 4) and P9-2 (black wire) on the machine

control board. See figure 17, page 10.

If there is continuity, go to step 7.
If there is no continuity, check that wires to

the terminal block are mechanically secure.

If so, replace the main wire harness and test

the dryer.

7.

Check for continuity between the neutral (N)

terminal of the plug and P8-3 (white wire) on

the machine control board.

If there is continuity, go to step 8.
If there is no continuity and the mechanical

connections of the wire are secure, replace

the main wire harness.

8.

Visually check that the P5 connector is

inserted all the way into the machine control

electronics.

9.

Visually check that the console electronics and

housing assembly are properly inserted into the

front console.

10.

If both visual checks pass, replace the

console electronics and housing assembly.

11.

Plug in dryer or reconnect power.

12.

Perform steps under DIAGNOSTIC: Console

Buttons and Indicators, page 1, to verify

repair.

13.

If indicators still do not light, perform

TEST #2, page 5.

GAS DRYER:

1.

Unplug dryer or disconnect power.

2.

Remove the cover plate from the top right

corner of the back of the dryer. See figure 3.

3.

Check that the power cord is firmly connected

to the dryer’s wire harness. See figure 5.

4.

Access the machine control electronics without

disconnecting any wiring to the control board.

See figure 16, page 9.

5.

With an ohmmeter, check for continuity

between the neutral (N) terminal of the plug

and P8-3 (white wire) on the machine control

board. The left-hand side of figure 6 shows the

position of the neutral terminal (N) on the

power cord plug. Also see figure 17, page 10.

If there is continuity, go to step 6.

Problem

Possible Cause / Test

NOTE:

Possible Cause/Tests MUST be performed

in the sequence shown for each problem.

Won’t power up.

(No response when buttons are pressed.)

1. Supply connections. See TEST #1, at right.
2. Check harness connections.
3. Console electronics and housing assembly.

See TEST #6, page 8.

Won’t start cycle when Start button is pressed.

1. If number display flashes, check to be sure the

door is completely shut, and press and hold

down Start for about 1 second.

2. See TEST #3, page 5.
3. See TEST #7, page 9.

Won’t shut off when expected.

1. Check Stop button.
2. Console electronics and housing assembly.

See TEST #6, page 8.

3. Moisture sensor. See TEST #5, page 8.

Control won’t accept selections.

Console electronics and housing assembly. 

See TEST #6, page 8.

Won’t heat.

1. Heater. See TEST #4, page 6.
2. Check harness connections.
3. See DIAGNOSTIC: Displaying Line Voltage,

page 2.

4. Check installation.

Heats in air cycle.

Heater. See TEST #4, page 6.

Shuts off before clothes are dry.

1. Check the dryness setting for auto cycles.
2. Check for full lint screen.
3. See DIAGNOSTIC: Displaying Inlet Air Flow,

page 2.

4. Check for clogged vent.
5. Moisture sensor. See TEST #5, page 8.
6. Dryness level adjust. See TEST #5a, page 8.

Pushing Power button causes dryer to beep,

but no indicators light.

1. Check console electronics harness connections

to the machine control.

2. Replace machine control electronics. 

See Accessing & Removing the Electronic

Assemblies, page 9.

TROUBLESHOOTING GUIDE

Some tests will require accessing components.

See figure 2, page 3, for component locations.

Figure 5.

Power cord-to-wire harness

connection for gas dryer.

COM

N

L1

Figure 4.

Plug-to-terminal connections for

electric dryer.

Figure 3.

Remove the cover plate.

Remove

Screw

Cover Plate

Wire

Harness

Power Cord

Power Cord

Plug

Terminal Block

Содержание Maytag NED7500VM0

Страница 1: ... off then stay on with displayed Continue with diagnostics 4 If entry into Diagnostic Test Mode is unsuccessful choose a different button except Stop and Cycle Signal and repeat step 2 If no indicators come on after repeating step 2 using a different button go to TEST 1 page 4 DIAGNOSTIC Active Fault Codes If there is an active fault code it will be flashing in the display Review the Display Fault...

Страница 2: ... to indicate the air flow range corresponding to the number displayed The More Dry LED will be illuminated for air flow readings above 40 cfm The Normal LED will be illuminated for air flow readings between 29 and 40 cfm The Less Dry LED will be illuminated for air flow readings less than 29 cfm If air flow value is low Less Dry LED is lit check to make sure the lint screen is clean the door seal ...

Страница 3: ... ONLY when in the Diagnostic Test Mode See TEST 4a page 7 Motor Drive System Failure F 26 flashes if there is a motor drive system failure See TEST 3 page 5 Moisture Sensor Open F 28 flashes if the moisture sensor strip is open This fault code appears ONLY when in the Diagnostic Test Mode See TEST 5 page 8 Moisture Sensor Shorted F 29 flashes if the moisture sensor strip has shorted This fault cod...

Страница 4: ...IAGNOSTIC Console Buttons and Indicators page 1 to verify repair 13 If indicators still do not light perform TEST 2 page 5 GAS DRYER 1 Unplug dryer or disconnect power 2 Remove the cover plate from the top right corner of the back of the dryer See figure 3 3 Check that the power cord is firmly connected to the dryer s wire harness See figure 5 4 Access the machine control electronics without disco...

Страница 5: ...n Thermal fuse no Belt belt switch Drive motor Centrifugal switch Door switch Machine control electronics See ESD information page 1 1 Unplug dryer or disconnect power 2 Access the machine control electronics and measure the resistance across P8 4 and P9 1 See Accessing Removing the Electronic Assemblies page 9 If resistance across P8 4 and P9 1 is in the range of 1 to 6 Ω replace the machine cont...

Страница 6: ... cut off high limit thermostat and heater If connections look good check for continuity across each of these components Replace the heater if it is electrically open Replace both the thermal cut off and inlet thermistor high limit thermostat assembly if either the thermal cut off or the high limit thermostat is electrically open 5 If no open circuit is detected remove the P4 connector then measure...

Страница 7: ...rature using an inlet thermistor that is part of the high limit thermostat assembly 1 Activate the Diagnostic Test Mode See procedure on page 1 2 If or is a displayed error in the Diagnostic Test Mode the inlet thermistor or wire harness is either open or shorted Unplug dryer or disconnect power Check wire connections at the machine control electronics and inlet thermistor See Accessing Removing t...

Страница 8: ...rness If a small resistance is not measured continue with step 8 8 Measure the resistance across each of the outermost contacts and the center terminal ground connection If a resistance less than infinity is measured replace the sensor harness 9 If moisture sensor diagnostic test passes check the thermistor Perform TEST 4a page 7 If the problem persists after replacing the moisture sensor and ther...

Страница 9: ... number appears in the display If any of the preceding conditions are not met 1 Unplug dryer or disconnect power 2 Check that the wires between the door switch and machine control electronics are connected See figure 13 for switch location and see Accessing Removing the Electronic Assemblies at right If the connections are OK replace the wire and door switch assembly and retest If wire and door sw...

Страница 10: ...r Accessing Removing the Electronic Assemblies page 9 and disconnect the P2 and P5 harnesses from the machine control 4 The console mounting bracket is fastened to the console front panel with two latches at both sides of the console assembly Unlatch the bracket gently with a screwdriver while pulling the mounting bracket assembly out See figure 18 5 The console electronics is split into two assem...

Страница 11: ...9828 6020698 6047486 6199300 6446357 6597144 6604298 6685241 6732447 6784673 6819255 D314261 D314262 D457991 D457992 D495453 REMOVING THE BACK PANEL 1 Unplug dryer or disconnect power 2 Remove the two rear screws from the top panel and slide the top panel to the rear to remove 3 Remove the cover plate disconnect the power cord and remove ground screw 4 Remove the metal spring clip between the back...

Страница 12: ... 196 F 91 C 4M DRIVE MOTOR 1 3 H P MAIN 3 3 3 6 START 2 7 3 0 SENSOR DOOR NEUTRAL MOTOR MTR CS MOIST MOIST RTN MODEL MODEL RTN OUTLET TEMP OUTLET TEMP RTN MACHINE CONTROL ELECTRONICS Y R P13 1 P13 2 P4 4 P4 5 P4 3 P4 6 R OUTLET THERMISTOR 10 k P9 2 L1 BR L1 LINE BK HEATER V HEATER RTN N O COM BK BK BK R R W NC HIGH LIMIT THERMOSTAT 295 F 146 C THERMAL CUT OFF 352 F 178 C HEATER 7 8 11 8 DRUM LAMP ...

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