Introduction

1.7LED Indicators

The AC4’s controller board has LED indicators that show the status of inputs, outputs and the com- mon alarm

DS56

OUTPUT1

DS54

OUTPUT2

OUTPUT3

DS63

 

DS61

OUTPUT4

OUTPUT5

DS60

 

DS62

OUTPUT6

OUTPUT7

DS55

DS57

OUTPUT8

DS59

CTRLLOCK

DS58

SENLOCK

DS53

CMN ALR

 

DS52

 

MOP

DS51 F PROG

DS48 574 TX

DS47 574 RX

DS78 485 RX

DS79 485 TX

DS69 INPUT1

DS71 INPUT2

DS72 INPUT3

DS70 INPUT4

DS67 INPUT5

DS66 INPUT6

DS65 INPUT7

DS64 INPUT8

Output LEDs

Status LEDs

Input LEDs

Table 2

LED indicators summary

 

 

 

 

 

 

LED Type

 

LED

Color

Description

 

 

 

 

 

EIA422

 

422 TX

Green

AC4 is transmitting information over the EIA422 port

LEDs

 

422 RX

Green

AC4 is receiving information over the EIA422 port

 

 

OUTPUT1

Green

Not used

 

 

OUTPUT2

Green

Not used

 

 

OUTPUT3

Green

Not used

 

 

OUTPUT4

Green

Not used

 

 

OUTPUT5

Green

Indicates output 1 is ON or energized

Output LEDs

OUTPUT6

Green

Indicates output 2 is ON or energized

 

 

OUTPUT7

Green

Indicates output 3 is ON or energized

 

 

OUTPUT8

Green

Indicates output 4 is ON or energized

 

 

CTRLLOCK

N/A

Not used

 

 

SENLOCK

N/A

Not used

 

 

CMN ALR

Green

Indicates output is ON or energized

 

 

MOP

Green

Indicates the microprocessor is operating properly (MOP)—must be on before

 

 

AC4 will function

 

 

 

 

 

 

FPROG

Green

Indicates firmware is being upgraded—lights up during upgrade process

Status LEDs

574 TX or 232 TX

Green

AC4 is transmitting information via the RS232 port

 

 

574 RX or 232 RX

Green

AC4 is receiving information via the RS232 port

 

 

485 RX

Green

Not used

 

 

485 TX

Green

Not used

 

 

INPUT1

Red

Not used

 

 

INPUT2

Red

Not used

 

 

INPUT3

Red

Not used

Input LEDs

INPUT4

Red

Not used

INPUT5

Red

Indicates input 1 is ON or energized

 

 

 

 

INPUT6

Red

Indicates input 2 is ON or energized

 

 

INPUT7

Red

Indicates input 3 is ON or energized

 

 

INPUT8

Red

Indicates input 4 is ON or energized

6

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Liebert AC4 user manual LED Indicators, LED indicators summary, Output LEDs Status LEDs Input LEDs

AC4 specifications

The Liebert AC4 is a highly advanced cooling solution designed for critical environments, such as data centers and telecommunications facilities. As data demands rise and IT equipment generates significant heat, an effective cooling system is paramount to maintaining optimal performance and reliability. The Liebert AC4 stands out in this space, offering a blend of efficiency, flexibility, and innovative technology.

One of the main features of the Liebert AC4 is its adaptability to various configurations and applications. It can be deployed in both hot aisle and cold aisle containment setups, making it versatile for different data center designs. This flexibility allows facilities to implement cooling strategies that align perfectly with their specific layouts and operational requirements.

The Liebert AC4 employs cutting-edge, variable-speed fans that enhance energy efficiency. These fans adjust their speed according to the cooling load, ensuring that the system operates at peak efficiency while significantly reducing energy consumption. This feature is essential in critical environments, where minimizing operational costs is often as important as maintaining optimal temperatures.

In addition to energy-efficient cooling, the Liebert AC4 integrates advanced monitoring and control technologies. With built-in intelligence and compatibility with the Liebert SiteScan monitoring system, users can ensure real-time visibility into their cooling operations. This monitoring capability enables data center managers to make informed decisions and swiftly address any cooling anomalies, minimizing the risk of overheating and downtime.

Furthermore, the system is designed to be easy to install and maintain, reducing downtime during setup and upkeep. The modular design allows for scalability, enabling organizations to expand their cooling capabilities as their needs grow.

The Liebert AC4 also features a robust construction that enhances reliability and durability, making it an ideal choice for environments where equipment uptime is critical. Its streamlined design not only optimizes airflow and cooling distribution but also contributes to aesthetic considerations in professional settings.

In conclusion, the Liebert AC4 combines efficiency, versatility, and advanced technologies to deliver a reliable cooling solution for modern data centers and critical facilities. Its variable-speed fans, flexible configurations, and advanced monitoring capabilities position it as a leader in the competitive field of cooling solutions, ensuring that critical equipment remains operational and efficient. Organizations looking to enhance their cooling strategies will find the Liebert AC4 to be an invaluable asset in today’s fast-paced digital landscape.