Detailed Description Of Operation; Bypass Control Keypad - ABB ACH 400 User Manual

Detailed Description
of Operation

Bypass Control Keypad

Ready LED
Enable LED
Bypass Fault LED
Drive Run LED
Drive Fault LED
Drive Selected LED
Bypass Selected LED
Bypass Run LED
ACH 400 with Electronic Bypass User's Manual
Chapter 2 – Overview of ACH 400 with Electronic Bypass
The following paragraphs provide a detailed description of the various
features and functions of the Electronic Bypass. Circuit diagrams for this
product are shipped with the unit.
Figure 2-3 shows the bypass control keypad and identifies the keys and LED
indicating lights. The functions of the various keys and LEDs are described in
the following paragraphs.
Ready LED
Enable LED
Drive and Bypass
Running/Stopped/
Faulted LEDs
Bypass Run
LED
Bypass
Fault LED
Reset Key
Auto Key
Figure 2-3 Bypass Control Keypad
The Ready LED is illuminated when the disconnect switch or circuit breaker
is closed and power is applied to the ACH 400 and bypass.
The Enable LED is illuminated when the external enable interlock contacts
are closed.
The Bypass Fault LED indicates the status of the bypass overload protection.
The LED is red when the overload has tripped or the bypass control board has
faulted.
The Drive Run LED is illuminated green when the ACH 400 drive is running.
The Drive Fault LED is illuminated red when the motor or drive protection
functions have shut down the ACH 400.
The Drive Selected LED is illuminated green when the ACH 400 drive has
been selected as the power source for the motor.
The Bypass Selected LED is illuminated green when the Electronic Bypass
has been selected as the power source for the motor.
The Bypass Run LED is illuminated green when the motor is running in
bypass.
Drive/Bypass
Selected LEDs
Drive/Bypass
Select Keys
Automatic LED
Auto LED
Hand LED
OFF Key
ON/Hand Key
2-5