IKA A 11 basic Mode D'emploi page 17

The motor is locked after the On/Off key has been pressed, or
the mill switches off shortly after it has started.
Causes:
- Too much grinding material in the grinding container (filling hight
exceeded)
- The feed granularity is too coarse
- Motor circuit breaker is tripped because of lock (overload)
Remedy:
- Release the On/Off switch and remove the grinding container. If
fragments of the grinding material have become stuck between
the grinding tool and the guard ring, do not remove them until
after you have disconnected the power cord.
- Fill the grinding container with a sufficient amount of pre-redu-
ced grinding material.
- Do not exceed the maximum filling hight in any case.
- In the case of hard or tough grinding material, reduce the maxi-
mum filling hight by 50%.
- If the motor circuit breaker has been tripped, you must wait until
it switches back off.
The motor speed falls sharply or the mill is locked during ope-
ration:
Causes:
The feed granularity is too coarse, ≥1cm
-
- There is too much feed material in the grinding container
- The grinding material is too tough
- The pulverization tool is being lowerded down into the grinding
material too quickly
Remedy:
- The speed can be kept at a constant level if the grinding tool is
moved slowly into the grinding material. If the speed drops off, you
should not lower the tool any further. Instead you should raise it
again and try to move the tool slowly into the grinding material at
the nominal motor speed.
Remedy:
- Release the On/Off switch and remove the grinding container. If
fragments of the grinding material have become stuck between the
A 11 022000
grinding tool and the guard ring, do not remove them until after you
have disconnected the power cord.
PLEASE NOTE: The shaft of the grinding container and
the pulverization tools may not be hot. If necessary, allow
the mill to cool off.
- Fill the grinding container with a sufficient amount of pre-redu-
ced grinding material.
- Do not exceed the maximum filling hight in any case.
- In the case of hard or tough grinding material, reduce the maxi-
mum filling height by 50%.
- If you do not release the On/Off key and the motor is locked, the
motor circuit breaker will be tripped. Before continuing with ope-
ration allow the mill to cool off.
The drive suddenly cuts out during the grinding procedure:
Causes:
- Overheating of the drive (malfunction display lights up when the
On/Off key is pressed, parts of the housing are warm).
- The grinding container has rotated itself loose and has triggered
the circuit breaker (malfunktion display lights up when you push
the On/Off switch).
- The power supply has been interrupted.
Remedy:
- If the mill has overheated, wait a few minutes.,
- Screw in the grinding container up to the stop.
- Check the power supply.
The lifting motion is blocked:
Causes:
- The middle section is dirty.
Remedy:
- Clean the middle section (see the section entitled „Maintenance
and cleaning").
If the occurs quite often, you should check the seal Item 20 (if
necessary, replace the seal as described in the section
„Maintenance and cleaning").
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