5.
2
ABNORMAL NOISE OR OPERATION
• Metallic noise
- Tool out of shape, rubbing or rotating backwards
(see § 2-3).
- Bowl damaged or not in place (see § 3.3).
- Lack of lubrication at planetary gear (see § 6-2 for
how to dismantle).
• Harsh noise
- Faulty belt (see § 6-1 for how to replace it or for the tension).
• Noisy motor
- Motor running on 2 phases. Check the connection and the
electrical circuit (see electrical diagram §6.4).
• Lack of power at the variator
- The electronic variator may limit the power automatically and
remain at a speed below that displayed on the potentiometer
button if:
. The speed selected is too high: risk of the belt slipping and
excessive wear
. There is too much product.
. The tool is not suitable for the work
- Depending on the case, do the following:
. Reduce the speed displayed (see §3.3).
. Reduce the quantity of products (see §3.4).
. If appropriate, change the tool.
• Speed does not vary
- Faulty control card or wires disconnected or cut.
• If the direction of rotation is inverted:
- Disconnect the machine: obligatory.
- Remove the rear plate.
- Check that the green display lamp on the variator is not lit and
unclip the terminal cover.
- Invert the wires on terminals U and V: an insulated screwdriver
must be used.
- Refi t the terminal cover and the rear plate.
- Connect the machine and the check the direction of rotation.
Wait for about a minute for effective discharge of the
condensers before intervening inside the variator.
DANGEROUS VOLTAGE.
5.
3
TOOL JAMMED ON THE TOOL HOLDER SPINDLE
- By tapping the tool with a mallet after clearing the pin from the
bayonet.
- Rub down the distorted part where necessary.
• Generally due to poor cleaning or a distorted tool caused by a
blow.
• If the tool is starting to seize, do not force it. Apply oil or pe-
netrating fl uid and wait a few minutes for the product to work.
• Work it gradually, applying measured force:
- Turning it, using a to-and-fro movement.
- Per rotazione, con un movimento di «andata e ritorno».
If the problem persists, contact your local dealer’s service
department.
Maintenance
6.
1
MECHANICAL PARTS
• This beater requires only minimum maintenance (the bearings,
motor and mechanical parts are greased for life).
• At least once a year it is recommended to:
- Clear the ventilation slots if required, they can cause overheating.
- Lubricate the planetary gears with a high adhesive grease
(see § 6.4).
- Clean out the belt dust and fl our from inside the machine using
a vacuum cleaner.
ATTENTION!!
Unplug the machine before carrying out any operation.
Maintenance may only be carried out by a qualifi ed, trained and authorised person.
6.
2
6.2 CHECK OR CHANGE OF BELT
• Check the belt tension and degree of wear. To check it, pro-
ceed as follows:
- Disconnect the machine.
- Remove the upper casing to access the transmission.
• If the belt is faulty:
- Loosen by 2 turns the 4 screws fi xing the motor onto the
column (size 13 mm spanner).
- Fit a new belt if required and check that the teeth are properly
engaged in the pulley grooves.
- Using a small piece of timber apply leverage between the head
and motor support until the device lifts slightly.
- Tighten the 4 screws while maintaining tension on the belt.
- Check that the tension is correct by pressing with the thumb
and forefi nger.
Note: It is absolutely essential to ensure the belt is
properly tensioned. If there is insuffi cient or excessive
tension, this may cause abnormal functioning of the
transmission or even premature wear to the belt or bearings.
XBB20/30 GB 07 07
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