CEMB USA C72 (B) - Manual (Page 27)

I 0307_0308 - 27
GB
7 - ERRORS
During machine operation, various causes of faulty operation could occur. If detected by the
microprocessor, they appear on the display as follows:
ERRORS CAUSES CONTROLS
Err. 1 No rotation signal. 1. Verify belt tautness.
2. Verify the function of the phase pick-up board and, in particular,
the reset signal.
3. Replace the phase pick-up board.
4. Replace the computer board.
Err. 2 Speed too low during detection.
During unbalance measurement rotation, wheel speed
is less than 42 rpm. 1. Make sure that a vehicle wheel is mounted on the wheel balancer.
2. Verify belt tautness.
3. Verify the function of the phase pick-up board and, in particular,
the reset signal.
4. Replace the computer board.
Err. 3 Unbalance too high. 1. Verify wheel dimension settings.
2. Check detection unit connections.
3. Perform machine calibration.
4. Mount a wheel with more or less known unbalance (less than 100
grammes) and verify the response of the machine.
5. Replace the computer board.
Err. 4 Rotation in opposite direction.
After pressing [START], the wheel begins to rotate in
the opposite direction (anticlockwise). 1. Verify the connection of the UP/DOWN – RESET signals on the
phase pick-up board.
Err. 5 Guard open
The [START] pushbutton was pressed without fi rst
closing the guard. 1. Reset the error by pressing pushbutton [7]=End.
2. Close the guard.
3. Verify the function of the protection uSwitch.
4. Press the [START] pushbutton.
Err. 7 /
Err. 8 NOVRAM parameter read error 1. Repeat machine calibration
2. Shut down the machine.
3. Wait for a minimum time of ~ 1 Min.
4. Re-start the machine and verify correct operation.
5. Replace the computer board.
Err. 9 NOVRAM parameter write error. Replace the computer board.
Err. 10 Measured width too small.
N.B.: Minimum width accepted by the
wheel balancer is 1.5” or 40 mm. 1. Repeat the distance measurement.
2. Repeat the width measurement.
3. Verify the calibration of the distance gauge and replace the
distance gauge potentiometer as necessary.
4. Verify the calibration of the width gauge and replace the width
gauge potentiometer as necessary.
5. Replace the computer board.
Err. 11 Speed too high error.
During unbalance measurement rotation, wheel speed
is more than 270 rpm. 1. Check if there is any damage or dirt on the timing disc.
2. Verify the function of the phase pick-up board and, in particular,
the reset signal.
3. Replace the computer board.
Err. 12 Unbalance measuring cycle error. 1. Verify phase pick-up board function.
2. Verify correct motor operation.
3. Verify belt tautness.
4. Replace the computer board.
Err.13/
Err.14/
Err.15/
Err.16/
Err.17/
Err.18 Unbalance measurement error. 1. Verify phase pick-up board function.
2. Check detection unit connections.
3. Verify machine earth/ground connection.
4. Mount a wheel with more or less known unbalance (less than 100
grammes) and verify the response of the machine.
5. Replace the computer board.