Fan not rotating - Compaq Computers & Internet

Fan motors have rotations, clockwise and counter clockwise, lead end and opposite lead end. If you are looking at the motor from the fan blade side and the wires are on the back (opposite) side of the motor then you are looking at opposite lead end. Then you need to determine the rotation of the blade. It will scoop the air, so turning the blade that direction will give you the rotation. They also sell motors that you can change rotation by changing certain wires they have added.
When you replace a motor you need to notice the rotation and order that rotation. which end of the motor you are looking at to determine it. Then order the same rotation when buying the new one.

some of these have a expansion pin that holds the fan blade assembly onto the shaft, this may have fallen out or ? broke,,,

the direction of fan rotation will be on the motor body but check that th curved edge ( leading edge) of the fan blade is facing the radiator and that air is being pulled through th radiator. THe motors are dc operation and can spin in both directions and the fans themselves are made to fit in front of the radiator( a/c fan) and blow air through the radiator. So checking these points is necessary

Laser scanner motor cooling fan 2 (FM6)

The fan motor does not
rotate at a specific speed 5
sec after it has started to
rotate.

The fan motor rotation
deviates from a specific
value for 5 sec or more
while it is rotating at a
specific speed.

The problem is power supply change the power supply

sounds like the fan needs replaced . .

• The operation of a fan (indicated
by detail code) is faulty.
• The CPU PCB is faulty.
• The DC driver PCB is faulty.


0001 The electrical unit fan (FM8)
has stopped to rotate in error.
0002 The IP cooling fan (FM7) has
stopped to rotate in error.
0003 The exhaust fan (FM2) has
stopped to rotate in error.
0004 The ozone suction fan (FM5)
has stopped to rotate in error.
0005 The toner suction fan (FM6)
has stopped to rotate in error.
0006 The laser scanner motor
cooling fan (FM4) has
stopped to rotate in error.
0008 The primary charging
assembly fan (FM3) has
stopped to rotate in error.

it should be a simple slide switch on the side of the housing that moves up and down to change the direction of rotation of the fan motor and blades. look at the manual that came with the fan to make sure it has this feature but i personally have never seen a fan without one.

some fan models will only spin one way!! If there is not a switch on the side cover of fan.

This might happen when it detects a non-functioning fan (to preserve all other components).
We've had the same problem on one of our server, one fan wouldn't start (needed more current to start it)

We had to replace the motherboard on server to make it work, since this one got it power from the MB.
A temporarily fix was: Pop fan 4 out, give it a push so it rotated and quickly insert it before it stopped, hope it won't be stopping until you receive a new motherboard.