Xylem HV 1.1 - 1.2 - Manual (Page 5)

5
1 Important safety instructions
Read and follow the operating instructions
and safety instructions carefully before
starting operations! All modifications must be
done by qualified technicians!
In addition to the instructions contained in these operating instructions please pay
attention to universal safety and accident prevention regulations.
The HYDROVAR drive head must be disconnected from the power supply before any work
can be carried out in the electrical or mechanical part of the system.
Installation, maintenance and repair work may only be carried out by trained, skilled and
qualified personnel.
Unauthorised modifications or changes to the system make all guarantees null and void.
When in operation the motor can be stopped by remote control, whereby the drive head
and the motor remain under voltage. For safety reasons, the unit must be disconnected
from the power supply when carrying out work on the machinery as locking out the
equipment by switching off the release mechanism or set value cannot prevent accidental
starting of the motor.
When the drive head is connected to power supply, the components of the
power unit as well as certain components of the master control unit are also
connected to the power supply.
Touching these components seriously endangers life !
Before removing the frequency inverter cover the system must be
disconnected from the power supply. After switching off the power supply
wait at least 5 minutes before starting work on or in the HYDROVAR drive
head (the capacitors in the intermediate circuit have to be discharged by the
installed discharge resistors first).
Voltages of up to 400 volts are possible (if there are faults it can be higher).
All work carried out when the frequency inverter is open may only be
performed by qualified authorised staff.
Furthermore, care must be taken not to short circuit the neighbouring
components when connecting the external control wires and that open
cable ends which are not in use are insulated.