2 Safety
2.1 Safety Symbols
The following symbols are used in this manual:
WARNING
Indicates a potentially hazardous situation that could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that could
result in minor or moderate injury. It can also be used to
alert against unsafe practices.
NOTICE
Indicates important information, including situations that
can result in damage to equipment or property.
2.2 Qualified Personnel
Correct and reliable operation and maintenance are
required for the trouble-free and safe operation of the
drive system. Only qualified personnel are allowed to
operate and maintain this equipment.
Qualified personnel are defined as persons who are trained
and authorized to commission, operate, and maintain
equipment, systems, and circuits in accordance with
pertinent laws and regulations. Also, the personnel must
be familiar with the instructions and safety measures
described in this manual.
2.3 Safety Precautions
WARNING
HIGH VOLTAGE
The drive system contains high voltage when connected
to AC mains input. Failure to ensure that only qualified
personnel are allowed to operate and maintain the
system can result in death or serious injury.
WARNING
UNINTENDED START
When the drive system is connected to AC mains, the
motor can start at any time. Unintended start during
programming, service, or repair work can result in death,
serious injury, or property damage.
The motor can start via any of the following:
•
An external switch.
•
A fieldbus command.
•
An input reference signal from the LCP.
•
A cleared fault condition.
•
Remote operation using MCT 10 software.
To prevent unintended motor start:
•
Disconnect the drive system from AC mains.
•
Press [Off/Reset] on the LCP, before
programming parameters.
•
The drive system, motor, and any driven
equipment must be fully wired and assembled
when the drive is connected to AC mains.
WARNING
DISCHARGE TIME
The drive system contains DC-link capacitors. Once mains
power has been applied to the drive system, these
capacitors can remain charged even after the power has
been removed. High voltage can be present even when
the warning indicator lights are off. Failure to wait 20
minutes after power has been removed before
performing service or repair work can result in death or
serious injury.
•
Stop the motor.
•
Disconnect AC mains and remote DC-link power
supplies, including battery back-ups, UPS, and
DC-link connections to other drives.
•
Disconnect or lock the PM motor.
•
Check the system for an installed external
discharge resistor. If a discharge resistor is
installed, activate its associated contactor.
Before servicing the drive system, use a
multimeter to verify that the DC voltage on
each drive module is fully discharged.
•
If an external discharge resistor is not installed,
wait 20 minutes for the capacitors to discharge
fully before performing any service or repair
work.
Safety
User Guide
MG37L202
Danfoss A/S © 08/2017 All rights reserved.
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