Safety; Safety Symbols; Qualified Personnel; Safety Precautions - Danfoss VLT Midi Drive FC 280 Instruction Manual

Safety

2 Safety

2.1 Safety Symbols

The following symbols are used in this document:
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 transport, storage, installation,
operation and maintenance are required for the trouble-
free and safe operation of the frequency converter. Only
qualified personnel are allowed to install or operate this
equipment.
Qualified personnel are defined as trained staff who are
authorized to install, commission and maintain equipment,
systems and circuits in accordance with pertinent laws and
regulations. Also, personnel must be familiar with the
instructions and safety measures described in this guide.

2.3 Safety Precautions

WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply or load sharing.
Failure to perform installation, start-up and maintenance
by qualified personnel can result in death or serious
injury.
•
Only qualified personnel must perform instal-
lation, start-up and maintenance.
MG07A122
Instruction Manual
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
DC supply or load sharing, the motor may 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 with an external
switch, a serial communication bus command, an input
reference signal from the LCP, via remote operation using
MCT 10 Set-up Software or after a cleared fault
condition.
To prevent unintended motor start:
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•
•
WARNING
DISCHARGE TIME
The adjustable frequency drive contains DC link
capacitors that can remain charged even when the
adjustable frequency drive is not powered. High voltage
can be present even when the warning LED indicator
lights are off. Failure to wait the specified time after
power has been removed before performing service or
repair work can result in death or serious injury.
•
•
•
•
•
Danfoss A/S © 11/2015 All rights reserved.
Disconnect the adjustable frequency drive from
line power.
Press [Off/Reset] on the LCP before
programming parameters.
Completely wire and assemble the frequency
converter, motor and any driven equipment
before connecting the frequency converter to
AC mains, DC supply or load sharing.
Stop the motor.
Disconnect AC line power and remote DC link
supplies, including battery backups, UPS and
DC link connections to other adjustable
frequency drives.
Disconnect or lock PM motor.
Wait for the capacitors to discharge fully. The
minimum waiting time is specified in Table 2.1.
Before performing any service or repair work,
use an appropriate voltage measuring device to
make sure that the capacitors are fully
discharged.
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