Whirlpool WED99HEDC0, Technical Education

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5-8
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HybridCare™ Dryer with Heat Pump Technology
DIAGNOSTICS & TROUBLESHOOTING
For Service Technician Use Only
Problem Possible Cause Checks & Tests
Won’t Power Up
• No operation
• No keypad
response
• No LEDs or display
No power to dryer. Check power at outlet, check circuit breaker, fuses, or junction
box connections.
Connection problem between AC
plug and dryer.
See Test #2: Supply Connections, page 6-6.
Connections between CCU and UI. Check connections and harness continuity between CCU and UI.
Power supplies not present at
machine electronics.
See Test #1: CCU Power Check, page 6-4.
User Interface problem. See Test #6: Buttons & Indicators, page 6-17.
Will Not Start Cycle
(No response when
START button is
pressed.)
Door not fully closed or striking the
door latch.
Be sure the door is completely closed, then press and hold the
START button.
Door Switch problem. See Test #7: Door Switch, page 6-18.
Drive Belt problem. See Test #3: Motor Circuit, page 6-8.
Motor problem. See Test #3: Motor Circuit, page 6-8.
User Interface problem. See Test #6: Buttons & Indicators, page 6-17.
CCU problem. See Test #1: CCU Power Check, page 6-4.
Lint filter not present (“LF” is
displayed).
Place the filter back into running position, and verify that it is
properly seated.
Will Not Shut Off
When Expected
Poor airflow. Check lint screens and fan. Clean if necessary.
Check the Start/Pause button. Perform UI Component Test under Component Activation.
Moisture Sensor problem. See Test #5: Moisture Sensor, page 6-15.
Thermistor problem. See Test #4c: Thermistors, page 6-14.
User Interface problem. See Test #6: Buttons & Indicators, page 6-17.
CCU problem. See Test #1: CCU Power Check, page 6-4.
Console Won’t Accept
Selections
User selects invalid option. Refer customer to “Use and Care Guide”.
User Interface problem. See Test #6: Buttons & Indicators, page 6-17.
Drum Will Not Spin Drive Belt problem. See Test #3: Motor Circuit, page 6-8.
Door switch problem. See Test #7: Door Switch, page 6-18.
Motor problem. See Test #3: Motor Circuit, page 6-8.
CCU problem. See Test #1: CCU Power Check, page 6-4.
Will Not Heat Check Installation. Verify proper dryer installation.
Check for L1 and L2. Perform CCU L1 and L2 tests under Install Diagnostics.
Heater system malfunction. See Test #4: Heat System, page 6-10
CCU problem. See Test #1: CCU Power Check, page 6-4.
Heats in Air Cycle Heater coil shorted. See Test #4: Heat System, page 6-10
Heater relay shorted. See Test #4: Heat System, page 6-10
Heater system problem. See Test #4: Heat System, page 6-10
Shuts Off Before
Clothes Are Dry
Dryness setting for auto cycle. Increase drying times for one or more auto cycles.
Lint screens full. Clean if necessary. Refer customer to “Use and Care Guide”.
Moisture Sensor problem. See Test #5: Moisture Sensor, page 6-15.
Adjust Customer Focused Dryness
Level.
See Test #5a: Adj. Cust. Focused Dryness Check, page 6-16.
Troubleshooting Guide
NOTE: Always check for error codes first (page 5-7)