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Table 1.2 LED indicators summary
LED Type
LED
422 TX
EIA422
LEDs
422 RX
OUTPUT1
OUTPUT2
OUTPUT3
OUTPUT4
OUTPUT5
Output LEDs
OUTPUT6
OUTPUT7
OUTPUT8
CTRLLOCK
SENLOCK
CMN ALR
MOP
FPROG
Status LEDs
574 TX or 232 TX
574 RX or 232 RX
Vertiv | Liebert® AC4 User Manual |
Color
Description
Green
Liebert AC4 is transmitting information over the EIA422 port
Green
Liebert AC4 is receiving information over the EIA422 port
Green
Not used
Green
Not used
Green
Not used
Green
Not used
Green
Indicates output 1 is ON or energized
Green
Indicates output 2 is ON or energized
Green
Indicates output 3 is ON or energized
Green
Indicates output 4 is ON or energized
N/A
Not used
N/A
Not used
Green
Indicates output is ON or energized
Indicates the microprocessor is operating properly (MOP)—must be on
Green
before Liebert AC4 will function
Green
Indicates firmware is being upgraded—lights up during upgrade process
Green
Liebert AC4 is transmitting information via the RS232 port
Green
Liebert AC4 is receiving information via the RS232 port
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