Danfoss VLT FCD 302 Operating Manual page 14

Operating Guide | VLT® Decentral Drive FCD 302
INDUCED VOLTAGE
Induced voltage from output motor cables that run together can charge equipment capacitors, even with
the equipment turned off and locked out/tagged out. Failure to run output motor cables separately, or to use
shielded cables, could result in death or serious injury.
Run output motor cables separately or use shielded cables.
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Simultaneously lock out/tag out all the drives.
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ELECTRICAL SHOCK AND FIRE HAZARD – RCD COMPLIANCE
The drive can cause a DC fault current in the PE conductor. Failure to use a Type B residual current-operated
protective device (RCD) can lead to the RCD not providing the intended protection and therefore can result in
death, fire, or other serious hazard.
When an RCD is used for protection against electrical shock or against fire, only a Type B device is allowed
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on the supply side.
UNINTENDED START
When the drive is connected to the AC mains, 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, or an input
reference signal from the LCP or LOP. The motor may also start via remote operation using MCT 10 setup 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
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start.
Check that the drive, motor, and any driven equipment are in operational readiness.
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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 backups, UPS, and DC-
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link connections to other drives.
Wait for the capacitors to discharge fully. The time for full discharge of the capacitors is minimum 4 minutes for VLT®
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Decentral Drive FCD 302, 400 V AC, 0.37–3.0 kW (0.5–4.0 hp).
Before performing any service or repair work, use an appropriate voltage measuring device to make sure that the capacitors
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are fully discharged.
14 | Danfoss A/S © 2025.04
WARNING
WARNING
WARNING
WARNING
Introduction and Safety
AQ267036816112en-000301 / 130R0208