NORD Drivesystems BU0200 - Manual (Page 300)

9 Additional Information
BU 0200 GB-4411 Subject to technical alterations 299
9.12 Maintenance and servicing information
9.12.1 Maintenance Instructions
In normal use, NORDAC SK 2xxE frequency inverters are maintenance free. Please note the "General data"
in Section 8.1.
Dusty environments
If the frequency converter is being used in a dusty environment, the cooling-vane surfaces should be
regularly cleaned with compressed air. If air intake filters have been built into the control cabinet, then these
should also be regularly cleaned or replaced.
Long-term storage
The frequency inverter, the 24V mains unit modules and the electronic brake rectifier SK CU4-MBR must be
connected to the supply network for at least 60 minutes at regular intervals.
If this is not carried out, there is a danger that the devices may be destroyed.
If a device is to be stored for longer than one year, it must be recomissioned with the aid of an adjustable
transformer before normal connection to the mains.
Long-term storage for 1 - 3 years
30 min with 25% mains voltage
30 min with 50% mains voltage
30 min with 75% mains voltage
30 min with 100% mains voltage
Long-term storage for >3 years or if the storage period is not known:
120 min with 25% mains voltage
120 min with 50% mains voltage
120 min with 75% mains voltage
120 min with 100% mains voltage
The device must not be subject to load during the regeneration process.
After the regeneration process, the regulations described above apply again (at least 60 min on the mains
1x per year).
NOTE
Also connect the 24V control voltage for SK 2x5E devices.