MG.60.C4.02 – VLT is a registered Danfoss trademark
1
VLT
®
6000 HVAC
Warning:
Touching the electrical parts may be fatal - even after the
equipment has been disconnected from mains.
Using VLT 6002-6005: wait at least 4 minutes
Using VLT 6006-6275: wait at least 15 minutes
The voltage of the frequency converter
is dangerous whenever the equipment
is connected to mains. Incorrect instal-
lation of the motor or the frequency
converter may cause damage to the
equipment, serious personal injury or death.
Consequently, the instructions in this manual,
as well as national and local rules and safety
regulations, must be complied with.
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Safety regulations
1.
The VLT frequency converter must be
disconnected from mains if repair work is
to be carried out.
Check that the mains supply has been
disconnected and that the necessary time
has passed before removing motor and
mains plugs.
2.
The [OFF/STOP] key on the control panel
of the VLT frequency converter does not
disconnect the equipment from mains and
is thus not to be used as a safety switch.
3.
Correct protective earthing of the
equipment must be established, the user
must be protected against supply voltage,
and the motor must be protected against
overload in accordance with applicable
national and local regulations.
4.
The earth leakage currents are higher than
3.5 mA.
5.
Protection against motor overload is
included in the factory setting. Parameter
117,
Motor thermal protection
, default
value is ETR trip 1.
NB!
The function is initialised at 1.0 x rated
motor current and rated motor frequency
(See parameter 117,
Motor thermal
protection
).
For the North American market: The ETR
functions ensure overload protection of
the motor, Class 20, in accordance with
NEC.
6.
Do not remove the plugs for the motor and
mains supply while the VLT frequency
converter is connected to mains. Check that
the mains supply has been disconnected
and that the necessary time has passed
before removing motor and mains plugs.
7.
Reliable galvanic isolation (PELV) is not
complied with if the RFI switch is placed in
OFF position.
This means that all control in- and outputs
can only be considered low-voltage terminals
with basic galvanic isolation.
8.
Please note that the VLT frequency
converter has more voltage inputs than L1,
L2, L3 when the DC-bus terminals are used.
Check that all voltage inputs have been
disconnected and that the necessary time
has passed before repair work is
commenced.
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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
[OFF/STOP] must always be activated,
following which data can be modified.
3.
A stopped motor may start if a fault occurs in
the electronics of the VLT frequency
converter, or if a temporary overload or a fault
in the supply mains or the motor connection
ceases.
