Motor Protection - Weka SR 25 Notice D'utilisation

5.2 Soft Turn Feature
By pressing the + and - button at the same time, the soft turn feature is selected, which is shown by
alternating displaying the figures 000 and 999. After pressing the start button the machine turns with the
low speed of 40 rpm and a very low torque. With this selection the drill bit can be assembled
automatically safely.
5.3

Motor protection

The electronic motor protection controls the motor current and limits it to the maximum value. Thus the
speeds drops remarkably in case of an overload. If you relieve the motor then, the speed increases again
to the nominal speed. If you overload the motor further until the speed is dropped to zero, the electronic
switches the motor off after a few seconds.
If the motor is operated with too less cooling water, it is switched off by the integrated over temperature
protection. Immediately care for sufficient supply of cooling water (at least 1l/min) for quick cooling down
the motor.
In general care for sufficient supply of cooling water as otherwise the motor and the power
electronic can be damaged.
5.4 Error report
If a fault appears, the red LED* flashes below the start button and the error code is shown on the display in
terms of a double figure. The meaning of these figures is described in the following
Error Meaning
code
1 Over current
2 Over temperature
3 Overload
4 Interrupt
5 Watchdog
6 Brown out
8 Maintenance rate exceeded
10 Intermediate voltage missing
11 Mains voltage too high
12 Mains voltage too low
13 Operation voltage too high
14 Operations voltage too low
The errors 10 - 14 must be accepted by pressing the red STOP button.
The errors 04 - 06 can not be accepted. It must be assumed that the motor control is damaged.
If the machine is connected to the electric mains, at first the data of the micro controller are transferred to the
display controller. This takes a few seconds. In this time the green LED* below the start button flashes. As
soon as the LED switches off, the machine is ready for operation.
5.5 Error analysis
The error analysis is mainly intended for the service of SR-machines. For getting into the service menu, press
the start button while connecting the machines to the electric mains (plugging in) Hold the start button until
the green LED starts flashing.
With the + and - buttons you can navigate through the service menu.
By again pressing the start button, you quit the service menu.
The single menu selections are listed in the following:
Procedure
The motor has been overloaded abruptly (jam)
The cooling of the motor is too less. Water temperature is
too high or too less flow.
The motor has been blocked for a longer time period, or
has been used in the overload range (loss of speed).
Serious fault in controller
Serious fault in controller
Serious fault in controller
After 250 operation hours the machine has to be
maintenanced. For restarting the machine, the start
button has to be pressed three times.
Charging circuit for uzw damaged
The machines is connected to too high voltage
(generator)
The machines is connected to too low voltage (generator)
The voltage is steady or momentary too high (generator,
or interference potential)
The voltage is steady or momentary too low (too long
extension cord, too low cross section, generator too
weak, or phase failure)
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