IKA A 11 basic Mode D'emploi page 23

On/Off -switch has not been pressed. This may be after only a few
seconds in the case of a short-term overload. If the mill has hea-
ted up a great deal after an extended period of operation, it may
take up to 30 minutes to cool off.
You should not press the On/Off - switch repeatedly during the
cooling off - phase, because the motor circuit breaker is equipped
with an auto - hold function that prevents the mill from starting up
again if the On/Off - switch is pressed repeatedly. To determine
whether the mill is ready to start up again, you should press the
On/Off - switch at intervals of from 5 to 10 minutes. If the malfun-
ction display lights up again while the grinding container is screwed
on, the temperature is still too hot (maximum cooling - off time 30
minutes at an ambient temperature of about 25 °C).
Eliminating malfunctions:
The mill does not start up:
Causes:
- Power cord is not plugged into the socket correctly.
- You did not push the On/Off - switch down far enough.
- The grinding container is not screwed in up to the stop (when you
press the On/Off - switch the malfunction display lights up).
- The mill has been heated up by the previous grinding procedure
(the malfunction display lights up when you press the On/Off -
switch).
- After disassembling the middle section (for example to clean it) the
switch block is not completely engaged.
Remedy:
- If necessary, check the power supply and the power cord.
- Push the On/Off - switch down until a „click" is audible.
If the malfunction display lights up when you push the
On/Off - switch:
- Screw the grinding container up to the stop (a soft „Click" is
audible) and if necessary remove any dirt from the threading.
- Check to make sure the switch block is engaged in place.
- If the mill has overheated, wait a few minutes for it to cool down.
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The motor is locked after the On/Off - switch 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-reduced
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
operation:
Causes:
- The feed granularity is too coarse, ≥ 10 mm.
- 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 (motor speed falls):
- 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.
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