Lenze MCH Series - Manual (Page 29)

13435744_EDBMH01_v13 25
12 INITIAL POWER UP
WARNING!
Hazard of electrical shock! Wait three minutes after disconnecting
incoming power before servicing drive. Capacitors retain charge
after power is removed.
Before attempting to operate the drive, motor and driven equipment be sure all
procedures pertaining to installation and wiring have been properly followed.
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!
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.
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.
WARNING!
Do NOT connect incoming AC power to output terminals T1, T2 and
T3! Do not cycle input power to the drive more than once every two
minutes. Damage to the drive will result.
Energize the incoming power line. The LCD display should light and flash “TESTING”
and then show the voltage and horsepower rating of the drive. The display should then
look like the example display below, which indicates that the drive is in a STOP state,
the speed setpoint is 20.00 Hz, and there is no load (because it is not running).
KSTOP > 20.00 HZ
0 % LOAD OFF
NOTE
If the drive is equipped with Bypass, the drive will not power up
unless the Drive Mode/Off/Bypass Mode switch is in the Drive Mode
position, or the Drive Test/Off/Drive Normal switch is in the Drive
Test position.
If the display does not appear, remove the incoming power, wait three minutes for the
bus capacitors to discharge and verify correct installation and wiring. If the wiring is
correct, re-apply incoming power and note the display for drive status. If the display still
does not appear call the factory for assistance.