Danfoss VLT CDS 302 Troubleshooting Manual - Page 5

Browse online or download pdf Troubleshooting Manual for DC Drives Danfoss VLT CDS 302. Danfoss VLT CDS 302 18 pages. Compressor drives

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Check List

Figure 1: Drive must be

turned OFF for 20min before

repair can start

For Your Safety

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.

FRCC.PC.036.A2.02