Whirlpool WED90HEFC W10240504 - Page 14

FOR SERVICE TECHNICIAN'S USE ONLY 7. Visually check that ALL connectors are fully inserted into the CCU. 8. Visually check that ALL connectors are fully inserted into the UI. 9. Reassemble all parts and panels. 10. Plug in dryer or reconnect power. 11. Perform steps under "Install Diagnostics", page 7, to verify repair. TEST #3: Motor Circuit This test will check the wiring to the motor and the motor itself. The following items are part of this motor system: Part of Motor System Drum belt Door switch Harness/connection Thermal fuse Drive motor Belt switch Centrifugal switch Machine control electronics Electric Dryer no ü ü Gas Dryer ü ü ü no ü ü ü ü  If resistance across P8-4 and P9-1 is in the range of 1 to 6 Ω, the motor circuit is acceptable. Replace the CCU.  Otherwise, continue to step 6. 6. Check the wiring and components in the path between these measurement points by referring to the appropriate wiring diagram (gas or electric) on pages 26 or 27. NOTE: To access motor system components, refer to Dryer Disassembly Instructions, page 24. ELECTRIC DRYER ONLY: Check the thermal fuse. See TEST #4b: Thermal Fuse, page 19. ALL DRYERS: Continue with step 7 below to test the remaining components in the motor circuit. 7. Check the drive motor and belt switch (gas dryer only). Slowly remove the drum belt from the spring-loaded belt switch pulley, gently letting the belt switch pulley down. See figure 7. Belt Switch Pulley NOTE: Refer to strip circuit on page 23 to diagnose drive motor. 1. Unplug dryer or disconnect power. 2. Remove top panel to access the machine electronics. 3. Check for loose, worn, or damaged drum belt-repair as necessary. 4. Door Switch problems can be uncovered by following procedure under TEST #7: Door Switch, page 21; however, if this was not done, the following can be performed without applying power to the dryer. Connect an ohmmeter across CCU 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 Ω).  If not, check harnesses and connections between CCU and door switch. If good, replace the door switch assembly. 5. Motor Circuit Check - Access the CCU and measure the resistance across P8-4 and P9-1. Drum Belt Figure 7 - Slowly remove drum belt. 8. Remove the white connector from the drive motor switch. See figure 8. Drive Motor Switch White Connector Figure 8 - Remove white connector. 264 3 5 1 PAGE 14 DO NOT REMOVE OR DESTROY