Maytag MCE8000AY manual Troubleshooting the Sensor-Dry circuit, Noisy and/Or Vibration

Troubleshooting Procedures

!WARNING

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

•Clothes too wet due to insufficient spin out by washer.

•Faulty Sensor Bar. See Sensor Bar diagnostic section.

Troubleshooting the Sensor-Dry circuit:

•Check for incorrect wiring of the electrical connector at the electronic control board.

Dryer runs for 2 minutes, jumps to a 1-minute cool down and then stops. Open Sensor Dry circuit. Check Sensor Bar. Refer to Sensor Bar Diagnostics section.

•Dryer does not shut off. Check sensor for continuity. If found, replace sensor bar or clean with alcohol. Some fabric softener sheets will coat the sensor bars.

Noisy and/Or Vibration

•Thumping. Check for loose tumbler baffle, rear tumbler roller(s) worn or misaligned, out-of-round tumbler or high weld seam on tumbler.

•Ticking. Check for loose wire harness or object caught in blower wheel area.

•Scraping. Check for front or rear bulkhead felt seal out of position or worn tumbler front bearings.

•Roaring - Check for blower wheel rubbing on blower housing or bad motor bearings.

•Popping or squealing sound. Check for a sticky or frayed belt.

System Check Mode

The Diagnostic State provides a set of utilities not intended for use by the consumer. Diagnostic State utilities provide specialized functions for performance evaluation and service. Upon recovery from a power failure, the Drying Cabinet always returns to the Normal- program State. Any Diagnostic State utility active prior to the power failure is effectively cancelled.

Note: Pressing the Off button exits the Diagnostic State and places the control board in the Sleep State.

Diagnostic State Menu

Enter a menu item by using the Time Adjust ^or v arrows to see the letter code desired and press Signal

(+).

NOTE: * indicates a submenu with further explanation given below.

Menu	Description
dd	Beginning of Diagnostic State Menu
cc	Factory Use Only
cd	Clear Diagnostic Codes
ch	Clear Help Codes
******cS	View Cycle Counts
****dL	View Diagnostic Code List
FS	Factory Use Only
hL	View Help Code List
Lo	Logic Board Output Self-test (Display
	will show “PASS” “PASS” or “FAIL”
	“FAIL”
pc	Factory Use Only
*Pd	Membrane Key Pad Utility
**rd	Read Sensor Inputs
***Sc	Sub-system Check
SF	Software Version
rS	Reset to Factory Default Conditions

rd**Read Sensor Inputs

To enter the Diagnostic State from the Normal Program State on the upper or lower dryer half of the keypad, press the Signal (+) button and Time Adjust ^ simultaneously for five (5) seconds. Upon entry to the Diagnostic State, the corresponding 7-segment display shows “dd”. Attempts to enter the Diagnostic State while a dryer cycle is active causes the invalid selection chime to sound.

After 10 minutes of inactivity the diagnostic state will be canceled, and the machine will return to normal operation. To exit the Diagnostic State, press the Signal (-)button.

Either half of the keypad may be used to request the Diagnostic State. Once initiated, all key entries must be made from the same half of the keypad. The LED indicators and 7-segment displays on the remaining half of the keypad are extinguished. Any key presses to the unused portion of the keypad are ignored and sound the invalid selection chime.

This utility allows the user to enable or disable the display of sensor input values. Once enabled, the user exits the Diagnostic State and the 7-segment display used to make the selection alternates between the sensor value and the time remaining. All other features operate as normal. It is not necessary to start a cycle for the sensor value to begin displaying. The user may display lower dryer values on the upper dryer half of the keypad with the converse also allowed.

After exiting the Diagnostic State with the sensor display function enabled, the 7-segment display continuously cycles through a 4-step sequence. Each step lasts 1.5 seconds. The sequence consists of the following:

“n=” appears to indicate that the next value is the time remaining. The time remaining value appears on the display.

“xx=” appears to indicate that the next value is from the selected sensor. Where “xx.xx” is the item selected from the sensor display menu. The sensor value appears on

12 16022785 Rev. 0 ©2003 Maytag Appliances Company