Yaskawa DSD 406 - Manual (Page 25)

2 Installation and Start-Up
21 Drive Start-Up
3/21/96
Drive Start-Up ❏ Ensure that all electrical connections are secure.
❏ Ensure that all transformers are connected for proper voltage according to
the drive system Schematic Diagram.
❏ Attach a DVM across the 115 VAC control power, at transformer T1
secondary terminals X1 and X2.
❏ Apply the three phase power and verify that the control power is between
103 VAC and 126 VAC as read on the DVM. Then press the RESET push
button on the front of the power cube, and observe the “Drive power-up
sequence” as described below.
NOTE: The "Drive Power-Up Sequence" is also described in the Operation
section of this manual under “Start-Up Operation”. If using upload/download
capabilities, please refer to DSD 406/412 Upload/Download procedure in the
Operation section.
❏ The “Drive Power-Up Sequence” can be observed by monitoring the
Standard Control/Display Unit (SCDU) on the front of the power cube.
❶
First, all of the segments on the digital LED display and all of the LEDs
will light for about one second.
❷
Then the LEDs and display extinguish and the drive will perform
internal checks.
❸
If the drive passes the self-test, then the READY LED will light and the
SCDU will display 'P-UP' to indicate a proper power-up.
Displays other than those mentioned above may occur. If abnormal display
conditions occur, the following actions maybe necessary to correct the situation:
●
If no digits or LEDs ever light up, check for proper voltage between the 115
VAC control power lines, or for blown 115 VAC control power fuses, or for
a defective control voltage power supply in the power cube.
●
If horizontal segment(s) of the SCDU display are lit, then one or more
phases of the three phase power are missing. Check the three phase power
fuses. See Section 3, Start-Up Operation, for more detailed information
about this test.