Figures

9.0 VOLTAGE PROGRAMMING PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 10.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

10.1 Cleaning the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10.2 Maintaining Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10.3 Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10.3.1 Internal Battery Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

11.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 12.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

	FIGURES
Figure 1	Front view of UPS	. 4
Figure 2	1000 and 1440VA PSI—rear view	. 5
Figure 3	2200 and 3000VA PSI—rear view	. 5
Figure 4	Line diagram of PowerSure PSI 1000VA & 1440VA	. 6
Figure 5	Line diagram of PowerSure PSI 2200VA & 3000VA	. 6
Figure 6	Support base for tower configuration	. 9
Figure 7	Rack mount handles	10
Figure 8	Fixed rails with inner members extended	10
Figure 9	Rack mounting rails and slide assemblies	11
Figure 10	REPO switch connections	13
Figure 11	Load level indicators—4 green, 1 amber	15
Figure 12	Battery level indicators—5 green	15
Figure 13	Normal mode operation with 26-50% load	17
Figure 14	Buck/Boost mode operation with 51-75% load and 21-40% battery capacity	17
Figure 15	Battery mode at 61 – 80% battery capacity	18
Figure 16	Low Battery mode	18
Figure 17	Load Level Indicators	21
Figure 18	Battery replacement procedure	23
Figure 19	Status indicators	24
	TABLES
Table 1	DB-9 pin assignment	19
Table 2	Troubleshooting chart	25
Table 3	UPS specifications	26
Table 4	Battery cabinet specifications	27
Table 5	Battery run times	28

PSITM specifications

The Liebert PSITM is an advanced power protection system designed to ensure the reliability and efficiency of critical systems in data centers, industrial applications, and mission-critical environments. As the demand for uninterrupted power supply continues to grow, the Liebert PSI serves as an indispensable asset.

One of the main features of the Liebert PSI is its online double-conversion technology. This method guarantees a continuous supply of clean and stable power to connected loads by converting incoming AC power to DC, then back to AC. This process eliminates power disturbances such as voltage sags, surges, and harmonics, ensuring that sensitive equipment operates without interruption.

In addition to its robust power protection capabilities, the Liebert PSI offers scalable solutions to meet varying power requirements. Ranging from 5 kVA to 40 kVA, it can be configured for single or three-phase operation. This flexibility allows businesses to tailor the system to match their specific needs, whether they are expanding data center operations or simply upgrading existing infrastructure.

Another notable characteristic of the Liebert PSI is its energy efficiency. The unit is designed to operate with a high efficiency of up to 94%, which not only reduces operational costs but also minimizes the environmental impact. Moreover, it features an eco-mode that optimizes energy use during non-critical operations without sacrificing reliability.

The Liebert PSI is equipped with advanced communication and management capabilities. It includes an intuitive LCD display for real-time monitoring, enabling users to access vital information about the unit's performance and status. Additionally, it supports various communication protocols such as SNMP and Modbus, allowing for seamless integration into existing management systems.

Furthermore, the Liebert PSI is designed with an emphasis on modularity, allowing for easy upgrades and maintenance. This modular approach reduces downtime and enhances serviceability, ensuring that the system remains reliable throughout its lifecycle.

In summary, the Liebert PSITM stands out as a comprehensive power protection solution that combines cutting-edge technology, energy efficiency, and user-friendly features. Its commitment to safeguarding critical systems against power disturbances makes it a vital component in the infrastructure of any modern data center or industrial setting.

TABLES

PSITM specifications