Crown CT23007HX Manual Original página 24

Switching the power tool on / off
Switching on:
Press the back part of on / off switch 5 and while
holding it in this position, move on / off switch 5 for-
ward� Press the front part of on / off switch 5 to fix it in
pressed position�
Switching off:
Press and release the back part of the on / off switch 5�
Design features of the power tool
Brushless motor
Power tool equipped with a brushless motor that pro-
vides the following advantages (compared to the pow-
er tool having a brush motor):
• high reliability due to the lack of wearing parts (car-
bon brushes, commutator);
• increased operating time on a single charge, com-
pared to power tools with carbon brushes;
• compact design and light weight�
Temperature protection (see fig. 4)
The temperature protection system enables to auto-
matically deactivate the power tool in case of excess
load or when the temperature of the battery 8 is ex-
ceeding 80°C� The system guarantees protection of
the power tool from damage in case of noncompliance
with the operation conditions�
When this protection system is activated indicators 11
will blink as shown onto fig. 4 during 3 seconds.
Overheating protection (see fig. 4)
Overheating protection system of the engine automati-
cally switches off the power tool in case of overheat-
ing� In this situation, let the tool cool before turning the
power tool on again� To switch on the power tool, first
turn it off as described above�
When this protection system is activated indicators 11
will blink as shown onto fig. 4 during 3 seconds.
Overdischarge protection
The battery 8 is protected by the safety system against
deep discharge� In case of complete discharge, the
power tool is automatically switched off� Attention:
do not try to switch on the power tool when the
protection system is activated the battery 8 can be
damaged.
Indicators of the state of battery charge (see fig. 5)
With the push of the button 10 the indicators 11 show
the state of charge of the battery 8 (see fig. 5).
Multifunction indicator
Multifunction indicator 4 signals about activation of
various protective systems of the power tool:
• signal about the need to charge the battery 8;
• activation of the restart protection system;
• activation of the overload protection system�
Overload protection
Overload protection system of the engine automatically
switches off the power tool when it is operated in a man-
ner that causes it to draw an abnormally high current�
When the power tool is overloaded, the multifunction
indicator 4 lights up� When the load on the power tool
is reduced, the multifunction indicator 4 goes out�
If the power tool continues to be overloaded, it will stop�
This prevents the motor and its related parts from being
damaged� After activation of the overload protection
system the multifunction indicator 4 will start blinking
quickly: 5 times - pause - 5 times - pause - 5 times�
To switch on the power tool, first turn it off as described
above�
Restart protection
Even if the battery 8 is installed on the power tool when
it switched on still, the power tool does not start� At this
time, the multifunction indicator 4 blinking during 20
seconds and this shows that restart protection system
was activated�
To switch on the power tool, first turn it off as described
above�
Soft start
Soft start enables smooth start of power tools - the
spindle is being run up gradually with no jerks and
kickbacks; no jump-like load is imposed on the motor
upon switching�
Break rundown
Break rundown stops the spindle of the power tool
within 2 seconds after the power tool is turned off�
Rotation speed stabilization system
The stabilization system maintains the preset RPM
both at an idle speed and under load� This allows for
the smooth advance of the power tool during operation�
Speed selector thumbwheel
Using speed selector thumbwheel 7, you may select
the required spindle speed (also during operation)�
The required speed is dependent on the material and
can be determined with practical trials�
When operating your power tool at a low speed for a
long time, it has to be cooled down for 3 minutes� To
do it, set a maximum speed and leave your power tool
to run idle�
Recommendations on the power tool op-
eration
Before starting operation switch on your
tool for testing, if the grinding attach-
ments are well fixed and to make sure,
that there is no radial grinding attachment
run - out. If the radial run - out is detected, switch your
power tool off and replace the faulty attachment.
• Switch your power tool on, wait for the spindle to
reach maximum speed and only then start getting the
grinding surface close to the blank treated�
English
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