Efficiency Of Balancing Accessories; Troubleshooting - Corghi EM 7240 Manuel D'utilisation

EFFICIENCY OF BALANCING ACCESSORIES

Checking balancing accessories allows the operator to make sure that wear has not al-
tered the mechanical specifications of flanges, cones, etc. beyond the specified limits.
A perfectly balanced wheel, which has been disassembled and reassembled in a different
position, should not show an unbalance value greater than 10 grams.
When a higher unbalance is found, check all the accessories carefully and replace the
components that are not in perfect condition (e.g. showing dents, abnormal wear, flange
unbalance, etc.).
Anyhow it is necessary to bear in mind that, if the cone is used to centre the wheel,
satisfactory balancing results cannot be achieved if the central hole of the wheel is out-
of-round or incorrectly centred; Better results can be achieved by centring the wheel
using the securing holes.
Bear in mind that any re-centring error made when the wheel is mounted on the car can
be removed only removed with an "on-the-vehicle balancing" of the wheel, using an on-
the-vehicle wheel balancer to complement the work of the wheel balancer.
Below is a list of faults that may occur and that the user can solve if the cause is found
among those indicated.
For any other malfunction or fault call in the technical support centre.
The machine does not switch on
No power at the socket.
Check the mains voltage is present.
➥
Check the electrical power circuit in the workshop.
➥
The machine plug is defective.
Check that the plug is undamaged.
➥
One of the FU1-FU2 fuses of the rear electrical panel has blown
Replace the blown fuse.
➥
The diameters and width values measured with the automatic
measuring devices do not match the rated values of the rims.
The sensors have not been positioned correctly during measurement
Bring the sensors to the position shown in the manual and follow the instructions in
➥
the WHEEL DATA ENTRY section.
The external sensor has not been calibrated.
Carry out the sensor calibration procedure. See warning instructions at the end of
➥
the SENSOR CALIBRATION section.
The automatic measuring devices are not working
The sensor was not in the rest position at switch-on (A 10) and the
been pressed to enter the wheel geometric data with the keypad, disabling control
of the automatic sensor.
➥ Return the sensors to the correct position.
98

TROUBLESHOOTING

(the displays remain switched off)
EM 7240 Operator's manual
key has