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Diagnostic LED is off, Control failure? What does this mean and how is it fixed. Unit is GMH95 and is 3 years old.

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First check the on board fuse then check that you are getting 24 volts to the board
if both are good the replace the control board. still under warranty

Posted on Apr 04, 2011

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Chamberlain whisper drive residential door opener model LW3500 stops after perhaps 2 seconds, lights flash and door will not open or close


Page 36 owners manual.

35
Operation
Diagnostic Chart
Your garage door opener is programmed with
self-diagnostic capabilities. The "Learn"
button/diagnostic LED will flash a number of times
then pause signifying it has found a potential issue.
Consult Diagnostic Chart below.
Installed
Safety Reversing
Sensor
"Learn"
Button
Safety Reversing
Sensor
Bell Wire
Diagnostics Located
on Motor Unit
LED or
Diagnostic
LED
1 Flash
Safetyreversing
sensorswire open
(broken or
disconnected).
OR
2 Flashes
Safetyreversing
sensorswire shorted
or black/white wire
reversed.
Symptom:
One orbothof the Indicatorlights onthe safety
reversingsensors donot glow steady.
l
Inspectsensor wiresfor a short(staple in wire),correctwiring
polarity(black/white wiresreversed),broken or disconnected
wires,replace/attach asneeded.
l
Disconnectall wiresfrombackofmotor unit.
l
Remove sensorsfrombracketsand shorten sensor wiresto
1-2 ft.(30-60 cm) frombackeach ofsensor.
l
Reattach sending eye to motor unitusing shortened wires.If
sending eye indicator lightglowssteadily,attach the receiving
eye.
l
Align sensors,ifthe indicator lightsglowreplace the wiresfor
the sensors.Ifthe sensor indicator lightsdo notlight,replace
the safetyreversing sensors.
3 Flashes
Door control or wire
shorted.
Symptom:
LEDis not lit ondoorcontrol.
l
Inspectdoor control/wiresfor a short(staple in wire),replace
asneeded.
l
Disconnectwiresatdoor control,touch wirestogether.If
motor unitactivates,replace door control.
l
Ifmotor unitdoesnotactivate,disconnectdoor control wires
frommotor unit.Momentarilyshortacrossred and white
terminalswith jumper wire.Ifmotor unitactivates,replace
door control wires.
4 Flashes
Safetyreversing
sensorsslightly
misaligned (dimor
flashing LED).
Symptom:
Sendingindicatorlight glows steadily,receiving
indicatorlight is dim orflashing.
l
Realign receiving eye sensor,clean lensand secure
brackets.
l
Verifydoor trackisfirmlysecured to wall and doesnotmove.
5 Flashes
Motor overheated or
possible RPMsensor
failure.Unplug to
reset.
Symptom:
Motorhas overheated; the motorunit does not
operate ortrolley is stuck onstopbolt =Motorunit hums briefly;
RPMSensor=Short travel6-8"(15-20 cm).
l
Unplug unitto reset.Tryto operate motor unit,check
diagnosticcode.
l
Ifitisstill flashing 5 timesand motor unitmoves6-8"(15-20
cm),replace RPMsensor.
l
Ifmotor unitdoesn'toperate,motor unitisoverheated.Wait
30 minutesand retry.Ifmotor unitstill will notoperate replace
logicboard.
6 Flashes
Motor CircuitFailure.
Replace Receiver
LogicBoard.
Symptom:
Motorunit doesn't operate.
l
Replace logicboard because motor rarelyfails. https://www.chamberlain.com/CatalogResourcesV3/en-us/shared/files/tucmanuals/114A4252.pdf

Jun 30, 2017 | Building Materials

1 Answer

Code F11 appears about 10 minutes into cycle or at the end when the door should open. Kitchen aid front load washer six years old


Hi

F11 is a motor control unit error which means that the motor control unit has repeating under or over voltage or over current conditions due to internal failure. You can check the wire harness connections between the motor and the MCU (motor control unit) and also between the central control unit & MCU. If the motor is working then replace the motor control unit. Hope this helps...please post back for further assistance.

Daniel

Aug 07, 2011 | Whirlpool Duet GHW9150P Front Load Washer

1 Answer

10 year old sears kenmore elite dryer, PF light will not stop flashing even after holding start for 10 seconds or after holding stop button for 10 seconds


Hello & Welcome to FixYa


PF error means power failure which is generally caused when the control board inside the unit goes bad. You can try unplugging the unit for 15-30 minutes, if the issue returns then the control board needs replacement. Please get back to me if you have any other questions.


Kevin

May 12, 2011 | Dryers

1 Answer

I have a Panasonic TH-42PX600U that will not turn on


Normally the event that you saw is the power supply. Sometimes it can be a failure on one of the boards that caused the power supply to go in to protect, or be damaged.

You must consider that after about 40,000 to 50,000 hours most electronic devices reach their expected life. There is something called MTBF (mean time between failure). This spec for consumer products is evaluated at normal room temperature of about 72F. A warmer operating environment will reduce the expected MTBF.

As you stated your set is about 2.5 years old. This is before the average MTBF period. Your set must have maybe 25,000 hours at most. I would expect to have a few years more with it.

From my experience when a TV, or appliance, or moist any electronic device has about 5 years of age it should be at its end of life period. At this age of a device investing money to service it has risk something else can fail.

Mar 11, 2017 | Panasonic TH-42PD50U 42 in. Plasma EDTV

1 Answer

Whirlpool Duet Sport ~ E28 Error Code


serial communication error between central control and motor control.
Check connections at ccu (top front right corner) and mcu (bottom by motor), check belt drive for wear.
Did motor run ? Any other codes in diagnostic? (any one modifier button 4 sec on 4 secs off 5 times.) F codes are failures and C codes are portions of test cycle(automaticly run)

Apr 28, 2009 | Whirlpool Duet GHW9150P Front Load Washer

1 Answer

Furnace won't turn on....


jump out thermostat or try jumping out the pressure switch

Feb 23, 2009 | Goodman GMS90703BXA Heater

1 Answer

It gives a f-11 code but diagnostic always works fine


http://www.applianceaid.com/duet_washer.html
just click the given link
F-11 MEANS================
Serial Communication Error
Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.============== 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

Dec 17, 2008 | Whirlpool Duet GHW9150P Front Load Washer

1 Answer

I have a Mitsubishi WD-62525. This morning my TV would not turn on so I pressed the rest button. After the Timer light stopped blinking I pressed power. I could hear the fans start than a somewhat loud...


the status light blinking red means a fan (the unit hs 4 of them) has failed. you need to determine which one. use the self diagnostic function:
Error Code Operational Check
Note:
The TV must be in “Shut Down” and not manually switched Off, to perform the Error Code Operational
Check. When the TV is switched Off, the code automatically resets to “12” No Error.
Press the front panel “DEVICE” and “MENU” buttons at the same time, and hold for 5 seconds to
activate the Error Code Operational Check. The LED will then flash denoting a two digit Code.
Note: The front panel buttons must be used, NOT those on the Remote Control.
• The number of flashes indicates the value of the MSD (tens digit) of the Error Code.
• The flashing then pauses for approximately 1/2 second.
• The LED then flashes indicating the value of the LSD (ones digit) of the Error Code.
Example: If the Error Code is “32”, the LED will flash three times, pause, and then flash two times.
• The Error Code is repeated a total of 5 times.


and read the code.
35= Chassis Fan failure
36 =Exhaust (Back Cover) or Lamp Ballast Fan failure
37= Engine (DMD or Lamp) Fan failure

Nov 15, 2008 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Coleman 15k will not come on


Here is the troubleshooting guide for your unit. Hope this helps.

TROUBLE SHOOTING GUIDE
TROUBLESHOOTING
Symptom Remedy
1. Remote does not turn on system
- Check and replace remote batteries if the display fades while
any button is activated or no display is present. - Point remote towards IR receiver during transmission. 2. System does not turn on, no green LED & no beep
- Check wiring. (see "installation instruction")
- Check modular cable to receiver.
- Check diagnostic LED status in the upper unit control box.
3. System does not turn on even when receiver green LED is on.
- Low or over voltage condition, check diagnostic LED status in the upper unit control box.

4. Fan runs but no cold air.
- Evaporator temperature sensor reaches low limit, defrost mode.
- Check diagnostic LED status in the upper unit control box.
5. System runs continuously in the cool mode
- Remote was set for "I feel" mode and is left in a heated environment (sun etc.)
6. System runs continuously in the heat mode
- Remote was set for "I feel" mode and is left in a cool environment

1. Diagnostic LED (green)
(Note: Located on the control board in the upper unit control box.)
a) The LED is on when the 12VDC is adequate and communications are
present.
b) The LED is flashing fast and steady when in the freeze mode. Evaporator has frozen and the freeze proctection switch is engaged.
c) The LED is flashing slow and steady when the delay on break timer is
activated.
d) The LED is flashing 1 cycle on and off for one second with high or low
12VDC. Check the incoming 12VDC power for OK.
e) The LED is flashing 2 cycles on and off for one second with a
communication problem. Problem with the control board in the unit and the remote.

Hope this helps.

Jeff

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Jul 29, 2008 | Coleman Mach 15 Air Conditioner

1 Answer

30.1.7 error on a hp lj4100


This code means: Flatbed optical-unit-motor failure


Steps to check this failure
1. Verify that the optical-unit lock is in the unlocked position.

2. Verify that the flatbed optical unit moves during initialization when the power is turned on.

-Or-

Use the control-panel diagnostic menu to test the scanner motor. See "Diagnostic tests below.

3. Contact HP Customer Care for further assistance.

Mar 24, 2008 | Computers & Internet

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