Danfoss VLT AQUA Operating Instructions Manual page 2

Safety
Safety
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 Minimum Waiting Time (Minutes)
[V]
4 15
200-240 0.25-3.7 5.5-45 kW
kW
380-480 0.37-7.5 11-90 kW
kW
525-600 0.75-7.5 11-90 kW
kW
525-690 11-37 kW
High voltage may be present even when the warning
LED display lights are off.
Discharge Time
®
VLT AQUA Drive MCO 101/MCO 102
20 30 40
110-250 315-1000
kW kW
45-400 450-1200 1400 kW
kW kW
®
MI38C402 - VLT is a registered Danfoss trademark
Symbols
The following symbols are used in this manual.
WARNING
Indicates a potentially hazardous situation which could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which can
result in minor or moderate injury. It can also be used to
alert against unsafe practices.
CAUTION
Indicates a situation that could result in equipment or
property-damage-only accidents.
NOTICE
Indicates highlighted information to regard with
attention to avoid mistakes or operate equipment at less
than optimal performance.
Approvals
NOTICE
The T7 (525-690 V) frequency converters are not certified
for UL.