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 adjustable frequency drive.
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. Additionally, the qualified personnel must be
familiar with the instructions and safety measures
described in this instruction manual.
2.3 Safety Precautions
WARNING
HIGH VOLTAGE!
Adjustable frequency drives contain high voltage when
connected to AC line input power. Installation, start-up,
and maintenance must be performed by qualified
personnel only. Failure to perform installation, start-up,
and maintenance by qualified personnel could result in
death or serious injury.
WARNING
UNINTENDED START!
When the adjustable frequency drive is connected to AC
line power, the motor may start at any time. The
adjustable frequency drive, motor, and any driven
equipment must be in operational readiness. Failure to
be in operational readiness when the adjustable
frequency drive is connected to AC line power could
result in death, serious injury, equipment, or property
damage.
WARNING
DISCHARGE TIME!
Adjustable frequency drives contain DC link capacitors
that can remain charged even when the adjustable
frequency drive is not powered. To avoid electrical
hazards, disconnect AC line power, any permanent
magnet type motors, and any remote DC link power
supplies, including battery backups, UPS and DC link
connections to other adjustable frequency drives. Wait
for the capacitors to discharge completely before
performing any service or repair work. The waiting time
duration is listed in
. Failure to wait for the
specified period of time after power has been removed
to do service or repair could result in death or serious
injury.
Voltage [V]
Power Size [kW (hp)]
Min. waiting time
(min)
380–480
315–1000 (425–1350)
40
525–690
450–1400 (600–1875)
30
Be aware that there may be high voltage on the DC link even
when the LEDs are turned off.
Table 2.1 Discharge Time
WARNING
LEAKAGE CURRENT HAZARD!
Leakage currents are higher than 3.5 mA. It is the
responsibility of the user or certified electrical installer to
ensure correct grounding of the equipment. Failure to
ground the adjustable frequency drive properly could
result in death or serious injury.
Safety
VLT
®
HVAC Drive FC 102
6
Danfoss A/S © 08/2014 All rights reserved.
MG11F522
2
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Summary of Contents for VLT HVAC Drive FC 102
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