3
vacon • 12
RECEIPT OF DELIVERY
Tel. +358 (0) 201 2121 • Fax +358 (0)201 212 205
3.3
Storage
If the frequency converter is to be kept in store before use make sure that the ambient conditions
are acceptable:
Storing temperature –40…+70
°
C
Relative humidity <95%, no condensation
The environment should also be free from dust. If there is dust in the air the converter should be
well protected to make sure dust does not get into the converter.
If the converter is to be stored during longer periods the power should be connected to the
converter once in 24 months and kept on for at least 2 hours. If the storage time exceeds 24 months
the electrolytic DC capacitors need to be charged with caution. Therefore, such a long storage time
is not recommended.
If the storing time is much longer than 24 months, the recharging of the capacitors has to be carried
out so that the possible high leakage current through the capacitors is limited. The best alternative
is to use a DC-power supply with adjustable current limit. The current limit has to be set for
example to 300…500mA and the DC-power supply has to be connected to the B+/B- terminals (DC
supply terminals).
DC-voltage must be adjusted to nominal DC-voltage level of the unit (1.35*Un AC) and supplied at
least for 1 hour.
If DC-voltage is not available and the unit has been stored de-energized much longer than 1 year
consult factory before connecting power.
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