PRECAUTIONS/SAFETY
NOTICES
Service Manual M4 - M10
29.12.1999
Page 2
1.
PRECAUTIONS
/
SAFETY
NOTICES
Do not use this manual unless you are familiar with safety regulations in
electric and safe electrical workshop practices. Only a competent, factory
trained service technician is authorised to attempt to service and repair
works, where internal circuitry of the drive is subjected to be under measures.
Note, that it is not possible for manufacturer to anticipate all of the ways or
conditions under which drive may be serviced or to provide cautions as to all
of the possible hazards that may result.
Producer as a manufacturer will continue to issue service information
updates after the first release of this manual. Updates will be informed and
distributed to the contact person in Service Centre. Version of documents can
be identified from the date placed in the header of chapters. All updates will
be informed / distributed by Service Bulletins distribution via email, internet
or mail.
Always when you are attempting to service/repair measures, make sure that
unit at repair is not powered up, if not intended to be. Make sure there are no
remaining dangerous voltages in circuitry and there is no other voltage source
for life threatening dangerous potentials.
Make sure, environment you are working at is safe and won’t cause increased
risk for personal injury, damages for unit, or environment. Remember also to
follow local / national safety rules and regulation.
Internal components and circuits are at potential of mains, when unit is
connected to the line. Level of the voltage is extremely life threatening, or may
cause severe injuries and damages.
Terminals for the process control (I/O terminals) are normally potential free
and isolated from the main circuit but this must be always confirmed. Relay
outputs may carry high energies entering from the external control devices,
even if unit is unpowered.
When the unit is connected to the line, all power terminals are a live, including
output terminals even if the drive is not enabled by the start command.
Note, that drive has some amount of leakage capacitance from the main
circuit to ground due to protection capacitors for input rectifier and due to
parasitic capacitance.
