ABB ACH550 User Manual page 20

18
If the Start/Stop, Safety Interlock and Run Enable input contacts are closed
and the system is in the Drive mode with the drive in either Hand or Auto
mode, the motor will start on the drive as soon as power is applied.
In order to prevent the motor from starting, the system should be in the Drive
mode and the drive should be OFF when the power is disconnected at the end
of the previous series of tests with the motor disconnected.
In order to prevent the motor from running without disconnecting the motor,
open the Run Enable and Safety Interlock contacts on bypass control board
terminals X2:2, X2:3 and X2:4 before applying power. Set the bypass to Drive
mode and the drive to OFF.
3. Apply power to the E-Bypass unit.
4. Press the Hand key on the ACH550 control panel.
CAUTION: Check motor rotation direction as soon as the motor begins to
move. If motor does not rotate in the correct direction, shut down the drive,
disconnect and lock out power to the drive and wait five minutes. Swap any
two motor output wires (T1, T2, and T3). Incorrect motor rotation direction may
cause equipment damage.
5. Slowly increase the output frequency by pressing the UP ARROW key. Verify that
motor speed varies as frequency varies.
6. Increase the speed to 60 Hz or the highest safe operating speed.
7. Measure the output current in all three phases. The current should be balanced, and
should not exceed the motor or drive rating.
8. Press the OFF key on the ACH550 control panel. The motor should stop.
CAUTION: Check the motor rotation direction in bypass.
Press the OFF key and then the Bypass Select key on the bypass keypad.
Press the Hand key and then quickly press the OFF key to "bump" the motor. If
the motor turns in the wrong direction, tag out/lock out, then swap any two
input power leads at the disconnect switch. Do not swap the motor leads.
If the drive does not operate according to these steps, refer to the ACH550-UH
User's Manual.
If the drive operates according to these steps, your ACH550 with E-Bypass is ready
to use with preset or modified macro settings. Refer to the ACH550-UH User's
Manual for programming instructions.
9. Perform the Keypad Control Test before connecting the motor. Refer to "Keypad
Control Tests" on page 16.
Installation
E-Bypass Configurations for ACH550 Drives