NORD Drivesystems BU0505 - Manual (Page 179)

9 Maintenance and servicing information
BU 0505 GB-1013 179
9. Maintenance and servicing information
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9.1 Maintenance Instructions
In normal use, frequency inverters are maintenance free if used correctly. Please note the "General
data" in Chap. 7.1.
Dusty environments
If the frequency converter is used in a dusty environment, the cooling 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 must be regularly connected to the supply network for at least 60 min.
If this is not carried out, there is a danger that the frequency inverter may be destroyed.
If a device is to be stored for longer than one year, it must be re-commissioned 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).
NOTICE 24 V control voltage
The 24 V control voltage supply must also be connected for SK 5x5E devices up to size 4.
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