Kenmore HE4t. history of F11 error code on spin cycle usually. i ordered this replacement CCU and installed it. now i get the error code (F11) right away just as the cycle starts to work.
Answer Hello John. The Motor Control Unit has internal failure. If failure occurs during high-speed spin the
door unlocks after 3 minutes. This error code is only shown in Diagnostic test. Possible Causes/Procedure
- Verify the shipping system including shipping bolts and spacers are removed,
and power cord out of the unit.
- Check if washer is on a dedicated circuit. Other devices on same circuit can create
line noise and cause this issue.
- Unplug washer or disconnect power
- Check the neutral feed to the MCU and CCU from the AC line filter.
- Check all wire harness connections between the Motor & MCU, and MCU to CCU,
are not broken or wires detached and connector internal pins are visible.
- Make sure that all the connectors are fully seated.
- Plug in washer or reconnect power cord.
- Verify the unit operation by running the Diagnostic Test cycle. See page 5.
- After the diagnostic test has finished, unplug washer or disconnect power cord
and wait for 15 seconds.
I am getting F06 and want to perform the resistance checks. It's not clear to me what needs to be disconnected and exactly where the test points 1,2 & 3 are located. Do you have a video for this or more detailed instructions? The wiring connectors all seem to be snapped in place so I suspect it is a failed MCU. I have read that the fuse on that board can be the culprit but it is not replaceable. Is there a check for that?
Answer Hello Paul,
As per the tech sheet: This is a drive motor tachometer error. The control is unable to properly detect motor speed and the machine will shut down. If a failure occurs during high-speed spin, the door will be unlocked after three minutes.
Possible Causes / Procedure
1. Verify the shipping system including shipping bolts, spacers and cables are removed.
2. Unplug washer or disconnect power.
3. Check wire harness connections between the drive motor and the Motor Control Unit (MCU), and between the MCU and the Central Control Unit (CCU).
4. Plug in washer or reconnect power.
5. Check the MCU by looking for operations of the drive motor.
6. Check the drive motor for powered rotations.
If you refer to page 13 of the tech sheet, the top left part of the wiring diagram, you will see the terminals labeled GND, In/Out, and Vcc. If there is a fuse on the board, you can check that with an ohm meter. If it is submerged in an epoxy type substance, the board will have to be replaced.
I've been getting 2 different error codes. One is an F1 E2 and the other is an F6 E2. I get the F1E2 more often. I've cycled the power and checked all of the connections that I can. Do you think it is the CCU or the MCU? If I by one and it doesn't work, can I return it to get the other?
The F1 E2 error is a MCU Error with multiple resets. Motor Control Unit (MCU) has an internal malfunction, repeating under or over voltage, or over current conditions. Can also be caused by momentary loss of neutral feed to MCU during the spin cycle. If the error occurs during a high-speed spin, the door will remain locked for 3 minutes.
TEST #3: Motor Circuit
This test checks the motor, motor control unit (MCU), and wiring. IMPORTANT: A guide (W10271535) is required to assemble the rotor onto the shaft. The guide is inserted into the threaded hole, and then the rotor is slid on over the guide.
NOTE: If the harness between the CCU and MCU is removed or communications are interrupted during operation, the MCU puts the motor into a braking mode, resulting in a significant drag on the drum when turned by hand. This mode can be cleared by removing power from the washer for a few seconds.
1. Check the motor and electrical connections by performing the “Quick Diagnostic Test” on page 6. The following steps assume that this
step was unsuccessful.
2. Unplug washer or disconnect power.
3. Check to see if basket will turn freely. If basket turns freely, go to step 4. If basket does not turn freely, determine what is causing the mechanical friction or lockup.
4. Remove the top and rear panels to access the machine electronics and motor components.
5. Visually check that connectors MS2 and MI3 are inserted all the way into the CCU. If visual checks pass, go to step 6. If visual checks fail, reconnect MS2 and MI3, and repeat step 1.
6. Visually check that all connectors are inserted all the way into the MCU (see Figure 6, at left). If visual checks pass, go to step 7. If visual checks fail, reconnect the MCU connectors and repeat step 1.
7. Check the motor windings. Disconnect the motor harness from the MCU. With an ohmmeter, verify the resistance values as shown below:
Motor Harness Winding
Pin 1 & 3 8.5 - 14.0 ohms
Pin 2 & 3 8.5 - 14.0 ohms
Pin 1 & 2 8.5 - 14.0 ohms
If the values are outside the range or open, replace stator assembly; otherwise, reconnect the motor harness and go to step 8.
8. Check the two harnesses between the CCU and MCU for continuity. If there is continuity, go to step 9. If there is no continuity, replace the main lower harness.
9. With a voltmeter set to AC, connect the leads across pins 1 and 2 of connector MS2.
10. Plug in washer or reconnect power.