Danfoss VLT FC 280 Operating Manual page 16

Operating Guide | VLT® Midi Drive FC 280
UNINTENDED START
When the drive is connected to AC mains, DC supply, or load sharing, the motor may start at any time. Unintended start during
programming, service, or repair work can result in death, serious injury, or property damage. Start the motor with an external
switch, a fieldbus command, an input reference signal from the local control panel (LCP), via remote operation using MCT 10
software, or after a cleared fault condition.
Disconnect the drive from the mains.
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Press [Off/Reset] on the LCP before programming parameters.
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Ensure that the drive is fully wired and assembled when it is connected to AC mains, DC supply, or load sharing.
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DISCHARGE TIME
The drive contains DC-link capacitors, which 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
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back-ups, UPS, and DC-link connections to other drives.
Wait for the capacitors to discharge fully. The minimum waiting time is specified in the table Discharge
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time and is also visible on the nameplate on the top of the drive.
Before performing any service or repair work, use an appropriate voltage measuring device to make sure
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that the capacitors are fully discharged.
Table 3: Discharge Time
Voltage [V]
200–240
380–480
16 | Danfoss A/S © 2024.10
WARNING
WARNING
Power range [kW (hp)]
0.37–3.7 kW (0.5–5 hp)
0.37–7.5 kW (0.5–10 hp)
11–22 kW (15–30 hp)
Minimum waiting time (minutes)
4
4
15
AQ381425076031en-000201 / 130R1223
Safety