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Motor will not rotate when restarting, it powers up but seems to be locked

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Check the blow down. The pipe from the pump going to the reciever should vent down when it stops. If it doesn't the unit will attempt to start against a pressure which will stall it. There is a check valve on the tank stopping air coming back and a small pipe should go from this to the pressure swich. The pressure switch when the unit stops opens the line to atmosphere and as long as the non return valve works it will vent down the line so the pump can start freely. If you have a constant his of air from the pressure switch when it stops it meant the non return valve is passing back. You can test this theroy by manualy venting the line when the unit stops.

Posted on Sep 05, 2014

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Since you have not listed the make or model compressor, I'll try to answer your question........ Is the compressor wired up correctley?
If the compressor is out of phase, it won't be able to perform at its peak level. Most 60-80 gallon compressores require at least 220-240 volts to operate creectly. Make sur all your presure switches are calibrated to the correct unit and the compressor should run wirtth no problems. Hope this helps.......................

Posted on Mar 19, 2014


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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Hello I found this for your error code.




Polygon motor lock trouble
The polygon motor does not rotate. The motor lock signal is detected for 6sec or more after the polygon motor rotates. The motor lock signal is detected for 1sec during rotation of the polygon motor.


Polygon motor unit failure Polygon motor connection, harness trouble or disconnection MCU PWB failure

I would unplug the unit for a minute and let it cool, then restart it and see if it was a temporary glitch or if the polygon motor has ceased to funtion. You might try to see if the wiring harness has come loose, otherwise you are looking for a new polygon motor.
Here is a copy of the service manual.It also suggests running a SIM 61-1.
I found a replacement motor for the machine, to give you an idea what it will cost to replace, keep in mind if you don't have the ability to replace this yourself you will have to call a repair tech to come in and do it and you may expect the cost for that to be at least the same as the motor.
Hopefully it isn't a motor failure. Good luck.

Oct 18, 2017 | Sharp Office Equipment & Supplies

1 Answer


  • Code: L4 01
  • Description:Main motor lock detection. The main motor does not rotate. After rotation of the main motor, the motor lock signal is detected for 1 sec or more. During rotation of the main motor, the motor lock signal is detected for 1 sec. When the main motor is stopped, the motor lock signal is not detected for 5sec or more. (Though the motor is stationary, it is judged as stable rotation.)
  • Causes:Main motor unit abnormality Improper connection or disconnection the main motor and the harness. MCU PWB abnormality
  • Remedy:Use SIM 25-01 to check the main motor operations. Check connection of the main motor harness/connector. Replace the main motor. Replace the MCU PWB.

Sep 08, 2017 | Sharp Office Equipment & Supplies

2 Answers

Remove c-24 errorminolta di450/500


C0F24 Code is the code for the sensor that monitors the drum. I would remove the drum cartridge two black screws pull out the drum assy. Remove the drum be careful do not nick or harm the drum the sensor is located on the left side of the to the rear of the of the drum looks like to little eye of a bug. Dust with a brush NO VACUUM static could destroy it. Re-install drum and re-install cartridge. When the last time a PM was done Developer replaced and Drum replaced?

Dec 14, 2014 | Minolta Office Equipment & Supplies

1 Answer

The indoor unit of my split system has a flashing timer light on the dispaly and will not turn on.

Check blower motor mechanism locked. rotate manually, if hard to rotate, replace bearing or motor. If easy rotate, check power to motor. If no power, replace PCB.Thanks.

Jan 31, 2011 | Heating & Cooling

1 Answer

Ac is automaticaly stop and desply message in screen E 3

E-3. Indoor fan motor mechanism locked or no power to blower motor. Check manually by rotating. If rotate freely, check power to motor. If no power PCB defective. Replace it. If hard to rotate motor, replace bearings or motor. Helpful?

Jan 28, 2011 | Samsung Heating & Cooling

1 Answer

All the sudden 3 Lights started blinking all together (Green,Yellow,Red) and the vents wont open aswell

Check indoor motor mechanism locked. Rotate manually. If hard to rotate, replace motor. If free to rotate, check for power to motor. If no power to motor,PCB problem. Helpful?

Jan 19, 2011 | Sharp CV10NH Air Conditioner

1 Answer

When I started to make the azimuth motor rotate, it rotate, suddenly it stopped and warned me.. motor stalled.. With a message of what cold be the causes, but I can restart all the process without moving...

First, always use a seperate 12 volt power pack and NOT the internal batteries. Do a Calibrate Motors -- first thing whenever you turn on the telescope.

Sep 30, 2010 | Meade LX200GPS Telescope

1 Answer

My 4 year old high efficiency front load washer set code "LE" (Overload in Motor). I unplugged and plugged back in and set to quick rinse and spin. Washer started adding water and trying to balance itself....


• The connector (3-pin, male, white) in the MOTOR HARNESS is not connected to the connector (3-pin, female, white) of STATOR ASSEMBLY. • The electric contact between the connectors (3-pin, male, white) in the MOTOR HARNESS and 4-pin, female, white connector in the MAIN PWB ASSEMBLY is bad or unstable. • The MOTOR HARNESS between the STATOR ASSEMBLY and MAIN PWB ASSEMBLY is cut (open circuited). • The hall sensor is out of order/defective.

Jun 23, 2009 | LG WM-2277HW Front Load Washer

1 Answer

Hoover Washer only agitates in one direction

Check the paw. It is a plastic somewhat u shaped piece that sits on the bottom of the machine and is connected by a plastic lever and a solenoid. It usually breaks on the end and as such won't lock the gearbox in. If you keep running it like that there is every chance you will probably burn the motor out.

Oct 08, 2008 | Washing Machines

1 Answer

Random electrical problems, sometimes it works beautifully, sometimes not!

F11 = Communication between the Central Control Unit (CCU) and the
Motor Control Unit (MCU) cannot be sent correctly.
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
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.

A Door Lock Error occurs if the door cannot be locked. It will try to lock
it six times before displaying the error code.
Le code d’erreur “Verrouillage porte” apparaît s’il n’est pas possible de verrouiller la
porte. Le système effectue six tentatives de verrouillage avant d’afficher le code d’erreur.
■ Door lock mechanism is broken or removed from door.
■ Door switch/lock unit failure.
1. Unplug washer or disconnect power.
2. Check door switch/lock unit.
3. Check the wire harness connections to the door
switch/lock unit and Central Control Unit (CCU).

Feb 12, 2008 | Whirlpool Duet GHW9150P Front Load Washer

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