Safety; Safety Symbols; Qualified Personnel; Safety Precautions - Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual

Safety

2 Safety

2.1 Safety Symbols

The following symbols are used in this document:
WARNING
Indicates a potentially hazardous situation which could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which could
result in minor or moderate injury. It may also be used
to alert against unsafe practices.
NOTICE
Indicates important information, including situations that
may result in damage to equipment or property.

2.2 Qualified Personnel

Correct and reliable transport, storage, installation,
operation and maintenance are required for the safe
operation of the frequency converter. Only qualified
personnel are allowed to install or operate this equipment.
Qualified personnel is defined as trained staff, who are
authorised to install, commission, and maintain equipment,
systems and circuits in accordance with pertinent laws and
regulations. Additionally, qualified personnel are familiar
with the instructions and safety measures described in this
document.
MG21B202
Operating Instructions

2.3 Safety Precautions

WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input power. Qualified personnel
only should perform installation, start up, and
maintenance. Failure to perform installation, start up,
and maintenance by qualified personnel could result in
death or serious injury.
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
the motor may start at any time. The frequency
converter, motor, and any driven equipment must be in
operational readiness. Failure to be in operational
readiness when the frequency converter is connected to
AC mains could result in death, serious injury,
equipment, or property damage.
WARNING
DISCHARGE TIME
Frequency converters contain DC-link capacitors that can
remain charged even when the frequency converter is
not powered. To avoid electrical hazards, disconnect AC
mains, any permanent magnet type motors, and any
remote DC-link power supplies, including battery back-
ups, UPS, and DC-link connections to other frequency
converters. Wait for the capacitors to fully discharge
before performing any service or repair work. The
amount of wait time is listed in the Discharge Time table.
Failure to wait the specified time after power has been
removed before doing service or repair could result in
death or serious injury.
Voltage [V] Power range [kW]
380-500
Table 2.1 Discharge Times
*Power ranges are for normal overload operation.
Danfoss A/S © Rev. 2014-01-22 All rights reserved.
Minimum waiting time
(minutes)
132-250 kW* 20
315-630 kW 40
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