High Voltage Warning; These Rules Concern Your Safety; Warning Against Unintended Start - Danfoss VLT FCD 303 Operating Instructions Manual

High voltage warning

The voltage of the frequency converter
is dangerous whenever the converter
is connected to mains. Incorrect fitting
of the motor or frequency converter may cause
damage to the equipment, serious injury or death.
Consequently, it is essential to comply with the
instructions in this manual as well as local and
national rules and safety regulations.

These rules concern your safety

1. The frequency converter must be disconnected from
the mains if repair work is to be carried out. Check
that the mains supply has been disconnected
and that the prescribed time has passed before
removing the inverter part from the installation.
2. The [STOP/RESET] key on the optional control
panel does not disconnect the equipment from
mains and is thus not to be used as a safety switch.
3. The unit must be properly connected to the
earth, the user must be protected against the
supply voltage and the motor must be protected
against overloading pursuant to prevailing
national and local regulations.
4. The earth leakage currents are higher than 3.5 mA.
5. Protection against motor overload is not included
in the factory setting. If this function is required,
It can be extremely dangerous to touch the electrical parts
even when the AC line supply has been disconnected.
For FCD 300: wait at least 4 minutes.
195NA194.10
4
set parameter 128 Motor thermal protection to
data value ETR trip or data value ETR warning. For
the North American market: The ETR functions
provide overload protection of the motor, class
20, in accordance with NEC.

Warning against unintended start

1. The motor can be brought to a stop by
means of digital commands, bus commands,
references or a local stop, while the frequency
converter is connected to mains. If personal
safety considerations make it necessary to
ensure that no unintended start occurs, these
stop functions are not sufficient.
2. While parameters are being changed, the
motor may start. Consequently, the stop
key [STOP/RESET] on the optional control
panel must always be acti v ated, following
which data can be modified.
3. A motor that has been stopped may start if faults
occur in the electronics of the frequency converter,
or if a temporary overload or a fault in the supply
mains or the motor connection ceases.
Warning:
MG.04.B7.02 - VLT is a registered Danfoss trademark
®
VLT FCD Series