Safety; Safety Symbols; Qualified Personnel; Safety Precautions - Danfoss VLT Refrigeration Drive FC 103 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 trouble-
free and safe operation of the frequency converter. Only
qualified personnel is 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, the personnel must be familiar
with the instructions and safety measures described in this
document.

2.3 Safety Precautions

WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input power. Failure to perform
installation, start-up, and maintenance by qualified
personnel could result in death or serious injury.
•
Installation, start-up, and maintenance must be
performed by qualified personnel only.
MG16E302
Operating Instructions
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
the motor may start at any time, causing risk of death,
serious injury, equipment, or property damage. The
motor can start by means of an external switch, a serial
bus command, an input reference signal from the LCP, or
after a cleared fault condition.
•
•
•
WARNING
DISCHARGE TIME
The frequency converter contains DC-link capacitors,
which can remain charged even when the frequency
converter is not powered. Failure to wait the specified
time after power has been removed before performing
service or repair work, could result in death or serious
injury.
1.
2.
3.
Voltage [V]
200-240
380-500
525-600
High voltage may be present even when the warning LED
indicator lights are off.
Table 2.1 Discharge Time
Danfoss A/S © Rev. 2014-02-06 All rights reserved.
Disconnect the frequency converter from mains
whenever personal safety considerations make
it necessary to avoid unintended motor start.
Press [Off] on the LCP, before programming
parameters.
The frequency converter, motor, and any driven
equipment must be in operational readiness
when the frequency converter is connected to
AC mains.
Stop motor.
Disconnect AC mains, permanent magnet type
motors, and remote DC-link power supplies,
including battery back-ups, UPS, and DC-link
connections to other frequency converters.
Wait for the capacitors to discharge fully, before
performing any service or repair work. The
duration of waiting time is specified in
Table 2.1.
Minimum waiting time (minutes)
4
1.1-3.7 kW
1.1-7.5 kW
1.1-7.5 kW
2 2
15
5.5-45 kW
11-90 kW
11-90 kW
7