ABB ACH550 User Manual page 27

E-Bypass Configurations for ACH550 Drives
Drive Run LED
The Drive Run LED is illuminated green when the ACH550 drive is running.
Bypass Fault LED
The Bypass Fault LED indicates the status of the bypass overload/underload
protection. The LED is red when the bypass has tripped on an overload/underload or
the bypass control board has faulted.
Drive Selected LED
The Drive Selected LED is illuminated green when the ACH550 drive has been
selected as the power source for the motor.
Bypass Selected LED
The Bypass Selected LED is illuminated green when the E-Bypass has been
selected as the power source for the motor.
Drive Fault LED
The Drive Fault LED is illuminated red when the motor or drive protection functions
have shut down the ACH550.
Bypass Run LED
The Bypass Run LED is illuminated green when the motor is running in bypass.
Automatic Transfer LED
The Automatic Transfer LED is illuminated green to indicate the system has
automatically transferred to Bypass after a Drive fault.
The Automatic Transfer LED flashes green to indicate the system has been placed in
an Override condition.
Auto LED
The Auto LED is illuminated green when the Auto Start contact has been selected as
the means for starting and stopping the motor in the bypass mode.
Hand LED
The Hand LED is illuminated green when the motor has been started manually in the
bypass mode.
Drive Select Key
The Drive Select key selects the ACH550 drive as the power source for the motor.
Bypass Select Key
The Bypass Select key selects the bypass as the power source for the motor.
Reset Key
The Reset key resets the bypass fault. It may take several minutes before the
bypass can be reset after an overload trip.
Auto Key
The Auto key selects the Auto Start contact as the means for starting and stopping
the motor in the bypass mode.
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