Danfoss VLT CDS 302, Troubleshooting Manual

Page: 5 / 18

For Your Safety
Figure 1: Drive must be
turned OFF for 20min before
repair can start
Frequency Converters (FC) contain dangerous
voltages when connected to the line voltage.
Only a competent technician should carry out
the service.
Some instructions should be compulsorily
followed to ensure safety while working with the
FC.
• Do not touch electrical parts of the FC when the
AC line is connected.
• 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 backups, UPS and DC-link connections
to other frequency converters.
• Wait for at least 20 minutes before touching any
of the components.
• When repair or inspection is done, the AC line
must be disconnected.
• The STOP key on the control panel does not
disconnect the AC line.
• During operation and programming of the
parameters, the motor may start without
warning. So you have to activate the STOP key
when changing data.
5
FRCC.PC.036.A2.02
Check List