Operation With A Reduced Number Of Power Units - WEG CFW-11W G2 RB Series User Manual

Energization and Start-Up

5.7 OPERATION WITH A REDUCED NUMBER OF POWER UNITS

The CFW-11M G2 RB and the CFW-11W G2 RB can operate with a reduced number of power units and reduced
power for a short time. That operating mode is called "Reduced Power Mode". It may be used in critical processes
in which you do not want a whole machine to stop when one power unit fails, enabling the operation with reduced
power until you have a power unit for replacement.
The general scheme of a drive with 5 UP11 is shown in
works as a drive of up to 2 UP11.
Assume that in the drive of
the drive operation with reduced power (Reduced Power Mode), you must follow the steps below:
1. Disconnect the power supply from the drive.
2. Identify the defective UP11 (in this case, number 4).
3. Disconnect the power and control of UP11 number4, according to
5
4. Move the control connections on the ICUP board, as shown in
cables of UP11 number 5 to position 4 of the ICUP board. Thus, UP11 5 becomes UP11 4.
5. Configure the new number of UP11 through DIP switch S2 located on the ICUP board, according to
3.31 on page 3-43.
6. Change DIP switch S1:4 to ON; thus, the control will be informed that the CFW-11M G2 RB or CFW-11W G2 RB
drive is operating with a reduced number of UP11.
ATTENTION!
It is recommended that the drive operate short of one UP11 at most.
7. Reconnect only the power supply of the drive control.
8. Alarm A420 will be indicated (Reduced Power Mode), informing that the CFW-11M G2 RB or CFW-11W G2
RB is operating in the reduced power mode.
9. Check if parameters P0295 (Rat. Curr. ND/HD Inv.) and P0296 (Rated Line Voltage) are according to the voltage
and the number of connected UP11.
5-6 | CFW-11MW G2 RB
Figure 3.31 on page 3-26, composed of 5 UP11, UP11 number4 fails. To reestablish
Figure 3.31 on page 3-26. The reduced power mode
Figure 5.5 on page
Figure 5.6 on page
5-7.
5-8. Connect the control
Table