Whirlpool WED6200SW0 Troubleshooting Guide download pdf (Page 7)

TECH SHEET - DO NOT DISCARD PAGE 7

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10054150

TEST #3 Drive Motor Circuit

This test will check the wiring to the motor

and the motor itself. The following items are

part of this motor system:

–

Harness/

connection

–

Thermal fuse

–

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 11.

➔

If resistance across P8-4 and P9-1 is in

the range of 1 to 6 ohms, replace the

machine control electronics.

➔

Otherwise, go to step 3.

3. Check the wiring and components in the

path between these measurement points

by referring to the appropriate wiring

diagram and strip circuit, pages 4 and 5.

4. Check the thermal fuse. See TEST #4b,

page 9.

5. Check the belt switch and drive motor.

Access the belt switch and drive motor by

removing the front panel/drum assembly.

See Removing the Front Panel/Drum

Assembly, page 11. Slowly remove the

drum belt from the spring-loaded belt

switch tension pulley, gently letting the

pulley down. See figure 5.

6. Remove the white connector from the

drive motor switch. See figure 6.

7. Using figure 7, check for the resistance

values of the motor’s Main and Start

winding coils as shown in the following

table.

NOTE: Main and Start winding coils must

be checked at the motor.

WINDING RESISTANCE

Ω

CONTACT POINTS OF

MEASUREMENT

MAIN

1.4–2.6

Blue wire in back at

pin 4 and bare copper

wire on pin 5 of black

drive motor switch

START

1.4–2.8

Blue wire in back at

pin 4 and bare copper

wire on pin 3 of black

drive motor switch

➔

If the resistance at the motor is correct,

there is an open circuit between the

motor and machine control

electronics. Check for failed belt

switch.

➔

If the Start winding resistance is much

greater than 4 ohms, replace the motor.

8. Check the belt switch by measuring

resistance between the two blue wires as

shown in figure 8, while pushing up the

belt switch tension pulley.

➔ If the resistance reading goes from

infinity to a few ohms as pulley arm

closes the switch, belt switch is OK.

If not, replace the belt switch.

➔ If belt switch is OK and there is still an

open circuit, check and repair the

wiring harness.

9. Door switch problems can be uncovered

in the Door Switch Diagnostic Test, page 1;

however, if this was not done, the

following can be done without applying

power to the dryer. Connect an ohmmeter

across P8-3 (neutral, white wire) and P8-4

(door, tan wire).

➔

With the door properly closed, the

ohmmeter should indicate a closed

circuit (0–2 ohms).

➔

If not, replace the door switch

assembly. See figure 11, page 10; and

Removing the Front Panel/Drum

Assembly, page 11.

Belt Switch

Tension Pulley

Belt Switch

Drum Belt

Figure 5. Slowly remove drum belt.

Main Winding:

Blue Wire in Back and Bare

Copper Wire (5 Position)

Start Winding:

Blue Wire in Back and Bare

Copper Wire (3 Position)

Figure 7. Main and start winding

measure points.

Belt Switch

Tension Pulley

Blue Wires

(Back and 4 Position)

Figure 8. Checking the belt switch.

Drive Motor

Switch

White

Connector

Figure 6. Remove white connector.

1 2 3 4 5 6 7 8 9 10 11 12

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