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This section contains safety instructions which you must follow when installing, operating and servicing the drive . If
ignored, physical injury or death may follow, or damage may occur to the drive, motor or driven equipment . Read the
safety instructions before you work on the drive .
Use of Warnings
Warnings caution you about conditions which can result in
serious injury or death and/or damage to the equipment, and
advise on how to avoid the danger . The following warning
symbols are used in this manual:
DANGER
Electricity warning warns of hazards from electricity which
can cause physical injury or death and/or damage to the
equipment .
WARNING
General warning warns about conditions, other than those
caused by electricity, which can result in physical injury and/
or damage to the equipment .
Safety in Installation and
Maintenance
These warnings are intended for all who work on the drive,
motor cable or motor .
Electrical safety
DANGER
Ignoring the following instructions can cause physical injury or
death, or damage to the equipment .
Only qualified electricians are allowed to install and
maintain the drive!
• Never work on the drive, motor cable or motor when input
power is applied . After disconnecting the input power,
always wait for 5 minutes to let the intermediate circuit
capacitors discharge before you start working on the
drive, motor or motor cable .
Always ensure by measuring with a multimeter
(impedance at least 1 Mohm) that there is no voltage
between the drive input phases U1, V1 and W1 and the
ground .
• Do not work on the control cables when power is applied
to the drive or to the external control circuits . Externally
supplied control circuits may carry dangerous voltage
even when the input power of the drive is switched off .
• Do not make any insulation or voltage withstand tests on
the drive .
•
If a drive whose EMC filter is not disconnected is installed
on an IT system (an ungrounded power system or a high
resistance-grounded [over 30 ohms] power system), the
system will be connected to ground potential through the
EMC filter capacitors of the drive. This may cause danger
or damage the drive .
•
If a drive whose EMC filter is not disconnected is installed
on a corner grounded TN system, the drive will be
damaged .
• All ACS320 Drive End Grounding screws are removed at
the factory . See Product Overview for location details .
OM 1190-1 • MD4 VFD
4 www .DaikinApplied .com
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Summary of Contents for ACS320
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