Lenze SCD Series - Manual (Page 26)

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12.0 INITIAL POWER UP AND MOTOR ROTATION
If input power has not been applied to the drive for a period of time exceeding three years (due to
storage, etc), the electrolytic DC bus capacitors within the drive can change internally, resulting in
excessive leakage current. This can result in premature failure of the capacitors if the drive is operated
after such a long period of inactivity or storage.
In order to reform the capacitors and prepare the drive for operation after a long period of inactivity,
apply input power to the drive for 8 hours prior to actually operating the motor.
Before attempting to operate the drive, motor, and driven equipment, be sure all procedures pertaining
to installation and wiring have been properly followed.
Disconnect the driven load from the motor. Verify that the drive input terminals (L1, L2, and L3) are
wired to the proper input voltage per the nameplate rating of the drive.
Energize the incoming power line. The LED display will flash a three digit number (322 in the
example below) that identifies the parameter version contained in the drive. The display should then
read “- - -”, which indicates that the drive is in a STOP condition. This is shown below:
WARNING!
DO NOT connect incoming AC power to output terminals T1, T2, and T3! Severe damage to the
drive will result. Do not continuously cycle input power to the drive more than once every two
minutes. Damage to the drive will result.
WARNING!
Hazard of electrical shock! Wait three minutes after disconnecting incoming power before servicing
drive. Capacitors retain charge after power is removed.
WARNING!
Severe damage to the drive can result if it is operated after a long period of storage or inactivity
without reforming the DC bus capacitors!
Apply input power
Display then reads "- - -"
Display flashes parameter
version (300-399)