Danfoss VLT HVAC Drive FC 102 Operating Manual page 11

Operating Guide | VLT® HVAC Drive FC 102
DISCHARGE TIME
The drive contains DC-link capacitors and, if input filter options are present, extra capacitors and inductors. These components
can remain charged even when the drive is not powered. High voltage can be present even when the warning indicator lights
are off.
Failure to wait the specified time after power has been removed before performing service or repair work could result in death
or serious injury.
Stop the motor.
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Disconnect AC mains, permanent magnet type motors, and remote DC-link supplies, including battery back-ups, UPS, and
-
DC-link connections to other drives.
Wait for the capacitors to discharge fully. The minimum waiting time is specified both in the Discharge Time table and on
-
the nameplate on top of the drive.
Before performing any service or repair work, use an appropriate voltage measuring device to make sure that the capacitors
-
are fully discharged.
Table 2: Discharge Time
Voltage [V]
380–480
525–690
HIGH VOLTAGE
AC drives contain high voltage when connected to AC mains input. Failure to perform installation , start-up, and maintenance
by qualified personnel can result in death or serious injury.
Only qualified personnel must perform installation, start-up, and maintenance.
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UNINTENDED START
When the drive is connected to the AC mains, DC supply, or load sharing, the motor may start at any time, causing risk of death,
serious injury, and equipment, or property damage. The motor may start by activation of an external switch, a fieldbus
command, an input reference signal from the LCP or LOP, via remote operation using MCT 10 Set-up software, or after a cleared
fault condition.
Press [Off] on the LCP before programming parameters.
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Disconnect the drive from the mains whenever personal safety considerations make it necessary to avoid unintended
-
motor start.
Check that the drive, motor, and any driven equipment is in operational readiness.
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Danfoss A/S © 2018.10
Minimum waiting time (minutes)
20
110–315 kW (150–450 hp)
110–400 kW (125–400 hp)
W A R N I N G
40
355–560 kW (500–750 hp)
450–800 kW (450–950 hp)
W A R N I N G
W A R N I N G
AQ262141314214en-000101 / 130R0880 | 11
Safety