Safety; Safety Precautions - Danfoss VLT Decentral Drive FCD 302 Operating Manual

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VLT® Decentral Drive FCD 302

Operating Guide

2 Safety

HIGH VOLTAGE

AC drives contain high voltage when connected to AC mains input, DC supply, or load sharing. 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.

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 equip-

ment 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.

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 are in operational readiness.

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.

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 time for full discharge of the capacitors is minimum 4 minutes for VLT® Decen-

tral 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

are fully discharged.

INTERNAL FAILURE HAZARD

An internal failure in the drive can result in serious injury when the drive is not properly closed.

Ensure that all safety covers are in place and securely fastened before applying power.

W A R N I N G

C A U T I O N

AQ267036816112EN-000101 / 130R0208

Safety

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