Question about Whirlpool Duet GHW9150P Front Load Washer

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Mcu burned out motor tests good

Can the mcu short itself out?

Posted by Anonymous on

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Anything with an IC can quit working. Also a motor that quits working can still have continuity if it isn't tested right giving false readings. I wonder if you can prove that the motor works by giving it power through test leads and if it needs temporary power to a start winding do so. If it has a centrifugal switch i would suspect it. Open the centrifugal switch and clean the contacts and verify that it opens and closes.

Posted on Nov 25, 2013

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Posted on Jan 02, 2017

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SOURCE: My front load washer has

yes a shorted motor winding will destroy the M.C.U.remove the motor and with a multi-meter check the 3 windings,there are 3 motor connections due to the motor being a 3 phase motor(operated by the inverter board) M.C.U. each connection should read between 7.8 and 11.6 ohms,if one connection is shorted it will ruin the triacs on the inverter board and destroy it

Posted on Apr 11, 2011

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My front load washer has burned up the MCU. Do I need to replace the motor and the MCU at the same time? Does the motor burn up the Mcu?


yes a shorted motor winding will destroy the M.C.U.remove the motor and with a multi-meter check the 3 windings,there are 3 motor connections due to the motor being a 3 phase motor(operated by the inverter board) M.C.U. each connection should read between 7.8 and 11.6 ohms,if one connection is shorted it will ruin the triacs on the inverter board and destroy it

Apr 11, 2011 | Whirlpool Duet GHW9150P Front Load Washer

2 Answers

Failure F7


Hello there and thank you for choosing fixya
Normally this error code is due to a bad motor controller that is shorted out and needs to be replaced
I have provided a list of things to check for you ok
Motor Control Unit Error
The Central Control Unit has detected a short in the motor control unit. If a failure occurs during high-speed spin, the door will be unlocked after 3 minutes.
  • Check wire harness connections between the Drive Motor and the Motor Control Unit (MCU), and between the MCU and the Central Control Unit (CCU)
  • Check the MCU
  • Check the Drive Motor
  • Check the Wire Harness checking for burned or stripped wires

Mar 28, 2011 | Whirlpool Washing Machines

1 Answer

F11 code on a whirlpoos duet washer model GHW9150PW1. I replaced the CCU and still have the same problem. When I run a diagnostic test at the C01 stage is when the F11 error appears. Any help would be...


Might be a wire broken from vibrations or the MCU itself.
I have a service manual for you. Use the manual to reference repairs and your machine's tech sheet for error codes. This is your F-11 error from your tech sheet:
F11 Serial communication error
Communication between the Central Control Unit (CCU) and the
Motor Control Unit (MCU) cannot be sent correctly.
Possible causes/procedure:
1. Unplug washer or disconnect power.
2. Check wire harness connections to the MCU, the motor, and
Central Control Unit (CCU).
3. Check the drive system for any worn or failed components.
4. Plug in washer or reconnect power.
5. Verify CCU operation by running a Diagnostic test or any
cycle.
6. Check the MCU by looking for operations of the drive motor.
7. Check the drive motor for powered rotations.
8. Check that the serial harness at the MCU is not mounted
upside down. The wires should be to the left when facing the
MCU connectors.
themobilian_1436.jpg

I have some more photos and repair manual for duet sport model HERE

themobilian_1437.jpg

Feb 11, 2011 | Whirlpool Duet GHW9150P Front Load Washer

1 Answer

Our whirlpool elite washer keeps F11 erroring and FDL locking the door.


Hi.

FDL is door lock. This is the first part to be tested, since it can be symptom of a wiring problem.

The door lock is tested by reading impedance on the door latch contacts.
If the door lock is OK, do the following troubleshooting for F11. The problem is usually CCU.

F11 is communication error between CCU (main control unit) and MCU (motor control unit - additional control module connected to motor and to CCU, located in a sealed box inside the washer).

This usually means that either CCU or MCU is defective. In some case the connectors or the wiring harness connecting the two modules is the problem.

The tech sheet says:

F11:Serial Communication Error
Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.
Solution:
* Check Wire Harness connectors to the MCU, the motor, and Central Control Unit (CCU)
* Check the Drive system for any worn or failed components
* Check MCU
* Check CCU
* Check Motor
* Check Wire Harness

The wiring harness is tested using a multimeter to ensure that there is continuity between the MCU and CCU connectors. If a single wire is good it will read zero Ohms (closed) from contact to contact.
Motor is tested reading Ohms, it must be read about 6 Ohms on three different pairs of contacts.
Drive system in motor is checked observing if any of the parts are broken.
MCU and CCU are tested reading volts during operation and testing at component level. The testing must be done by a tech. Check CCU to see if there is any sign of failure (eg burnt spots).

Most of the time the problem is CCU. Trick to repair it include testing and eventually reheating the solder joint of the two on-board relays, cleaning connector contacts with circuit cleaner solution. This in case that the problem is CCU.

Disconnect the unit from power for five minutes as first test. This will reset CCU.

Jan 20, 2011 | Kenmore Elite 45986 Front Load Washer

1 Answer

Whirlpool 9400 frontload washer displaying F11 code. Is there a diagnostic that I can run?


Hi.

F11 is communication error between CCU (main control unit) and MCU (motor control unit - additional control module connected to motor and to CCU, located in a sealed box inside the washer).

This usually means that either CCU or MCU is defective. In some case the connectors or the wiring harness connecting the two modules is the problem.

The tech sheet says:

F11:Serial Communication Error
Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.
Solution:
* Check Wire Harness connectors to the MCU, the motor, and Central Control Unit (CCU)
* Check the Drive system for any worn or failed components
* Check MCU
* Check CCU
* Check Motor
* Check Wire Harness

The wiring harness is tested using a multimeter to ensure that there is continuity between the MCU and CCU connectors. If a single wire is good it will read zero Ohms (closed) from contact to contact.
Motor is tested reading Ohms, it must be read about 6 Ohms on three different pairs of contacts.
Drive system in motor is checked observing if any of the parts are broken.
MCU and CCU are tested reading volts during operation and testing at component level. The testing must be done by a tech. Check CCU to see if there is any sign of failure (eg burnt spots).

Most of the time the problem is CCU. Trick to repair it include testing and eventually reheating the solder joint of the two on-board relays, cleaning connector contacts with circuit cleaner solution. This in case that the problem is CCU.

Disconnect the unit from power for five minutes as first test. This will reset CCU.

The diagnostic is different depending on the model. The diagnostic is illustrated in the machine tech sheet, which is tucked inside the control panel assembly. Open control assembly and check. By the way, if you have f11 the diagnostic won't help. Machine must be tested.

Regards.

Ginko.

Jan 17, 2011 | Whirlpool WFW9400S

1 Answer

Washer displays an F11 error code. I replaced the MCU but still the F11 code. Wire harness is good.


Hi.

It is probably the CCU (main control). Wiring harness, motor and drive train must be checked before replacing the CCU.

Here full troubleshooting for F11.

F11 is communication error between CCU (main control unit) and MCU (motor control unit - additional control module connected to motor and to CCU, located in a sealed box inside the washer).

This usually means that either CCU or MCU is defective. In some case the connectors or the wiring harness connecting the two modules is the problem.

The tech sheet says:

F11:Serial Communication Error
Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.
Solution:
* Check Wire Harness connectors to the MCU, the motor, and Central Control Unit (CCU)
* Check the Drive system for any worn or failed components
* Check MCU
* Check CCU
* Check Motor
* Check Wire Harness

The wiring harness is tested using a multimeter to ensure that there is continuity between the MCU and CCU connectors. If a single wire is good it will read zero Ohms (closed) from contact to contact.
Motor is tested reading Ohms, it must be read about 6 Ohms on three different pairs of contacts.
Drive system in motor is checked observing if any of the parts are broken.
MCU and CCU are tested reading volts during operation and testing at component level. The testing must be done by a tech. Check CCU to see if there is any sign of failure (eg burnt spots).

Most of the time the problem is CCU. Trick to repair it include testing and eventually reheating the solder joint of the two on-board relays, cleaning connector contacts with circuit cleaner solution. This in case that the problem is CCU.

Disconnect the unit from power for five minutes as first test. This will reset CCU.

Nov 21, 2010 | Whirlpool Duet GHW9150P Front Load Washer

1 Answer

Trouble code f11 or fdl for whirlpool duet front load wash machine.


Hi.

FDL is door lock. This is the first part to be tested, since it can be symptom of a wiring problem.

The door lock is tested by reading impedance on the door latch contacts.
If the door lock is OK, do the following troubleshooting for F11. The problem is usually CCU.

F11 is communication error between CCU (main control unit) and MCU (motor control unit - additional control module connected to motor and to CCU, located in a sealed box inside the washer).

This usually means that either CCU or MCU is defective. In some case the connectors or the wiring harness connecting the two modules is the problem.

The tech sheet says:

F11:Serial Communication Error
Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.
Solution:
* Check Wire Harness connectors to the MCU, the motor, and Central Control Unit (CCU)
* Check the Drive system for any worn or failed components
* Check MCU
* Check CCU
* Check Motor
* Check Wire Harness

The wiring harness is tested using a multimeter to ensure that there is continuity between the MCU and CCU connectors. If a single wire is good it will read zero Ohms (closed) from contact to contact.
Motor is tested reading Ohms, it must be read about 6 Ohms on three different pairs of contacts.
Drive system in motor is checked observing if any of the parts are broken.
MCU and CCU are tested reading volts during operation and testing at component level. The testing must be done by a tech. Check CCU to see if there is any sign of failure (eg burnt spots).

Most of the time the problem is CCU. Trick to repair it include testing and eventually reheating the solder joint of the two on-board relays, cleaning connector contacts with circuit cleaner solution. This in case that the problem is CCU.

Disconnect the unit from power for five minutes as first test. This will reset CCU.

Nov 07, 2010 | Whirlpool Duet GHW9150P Front Load Washer

1 Answer

My whirlpool Duet washer keeps stopping in the middle of a cycle with the code F11. It doesn't go through the spin cycle. Any suggestions? Thanks!


Hi.

F11 is communication error between CCU (main control unit) and MCU (motor control unit - additional control module connected to motor and to CCU, located in a sealed box inside the washer).

This usually means that either CCU or MCU is defective. In some case the connectors or the wiring harness connecting the two modules is the problem.

The tech sheet says:

F11:Serial Communication Error
Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.
Solution:
* Check Wire Harness connectors to the MCU, the motor, and Central Control Unit (CCU)
* Check the Drive system for any worn or failed components
* Check MCU
* Check CCU
* Check Motor
* Check Wire Harness

The wiring harness is tested using a multimeter to ensure that there is continuity between the MCU and CCU connectors. If a single wire is good it will read zero Ohms (closed) from contact to contact.
Motor is tested reading Ohms, it must be read about 6 Ohms on three different pairs of contacts.
Drive system in motor is checked observing if any of the parts are broken.
MCU and CCU are tested reading volts during operation and testing at component level. The testing must be done by a tech. Check CCU to see if there is any sign of failure (eg burnt spots).

Most of the time the problem is CCU. Trick to repair it include testing and eventually reheating the solder joint of the two on-board relays, cleaning connector contacts with circuit cleaner solution. This in case that the problem is CCU.

Disconnect the unit from power for five minutes as first test. This will reset CCU.

Oct 25, 2010 | Whirlpool Duet GHW9150P Front Load Washer

2 Answers

My kEnmore front load he2 plus washer is flashing f-28 does anyone know what this means?


Hi,

F-28 refers to Communication Error.

Possible Causes/Procedure

1. Unplug washer or disconnect power.

2. Check wire harness connections to the MCU, the motor, and

Central Control Unit (CCU).

- Check connections of the CCU board within the housing.

- Make sure all grounding switches are engaged.

3. Check the drive system for any worn or failed components.

4. Plug in washer or reconnect power.

5. Verify CCU operation by running a Diagnostic Test
or any

cycle.

6. Check the MCU by looking for operations of the drive motor.

7. Check the drive motor for powered rotations.

8. Check that the serial harness at the MCU is not mounted

upside down. The wires should be to the left when facing

the MCU connectors.

Note - The cost of CCU and MCU is more than $200 each. You cannot replace a part of CCU and MCU. The complete Set needs to be changed. If the Washer is more than 4 years ( which i assume, as this Error is usually after 4-5 Years ), it is better to Invest in new one than Repair.

Let me know, if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Dec 06, 2009 | Washing Machines

2 Answers

Washer has an F11 code what does that mean?


F11 means Serial communication error
Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.

Potential Causes

• Check Wire Harness connections to the MCU, the motor, and Central Control Unit (CCU)
• Check the Drive system for any worn or failed components
• Check MCU
• Check CCU
• Check Motor
• Check Wire Harness
(Refer manual to test the components)
Replace failed component.

Preferred to be done by a technician unless you are handy.Good luck with the machine.Hope I answered your question.

Apr 12, 2009 | Whirlpool Duet GHW9150P Front Load Washer

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