Troubleshooting chart, Problem Cause Solution

			Troubleshooting
Table 2	Troubleshooting chart

	Problem	Cause	Solution

			Check the circuit protector on the rear of the UPS.
			If it is tripped, reset it and restart the UPS. For
		Short circuit	further help, contact your local dealer, Liebert
UPS will not start			representative or the Liebert Worldwide Support
			Group.
		Battery disconnected or is	Check for proper connection of battery or
		completely discharged	batteries.
		UPS not plugged in	Plug in the power cord securely.

		Circuit protector tripped	Reset the circuit protector and restart the UPS.

UPS starts on battery, but will not			Wait until the voltage rises to an appropriate level
UPS starts on battery, but will not		Input voltage below threshold	or have the mains power checked by a qualified
switch to AC			electrician.

			Wait until voltage lowers to an appropriate level
		AC overvoltage	or have the mains power checked by a qualified
			electrician.
			Check load level display and remove non-
		Load exceeded UPS capacity	essential loads. Recalculate the load and reduce
		(110%), All Load Level Indicators	number of loads connected to UPS - the total
		are illuminated; continuous beep	wattage of your equipment must not exceed the
			capacity of the UPS.
		Over temperature shutdown, Over	Make sure that the UPS is operating in 0°C to
		Temp Indicator lit; continuous	40°C (32°F to 104°F) and that it has adequate
		beep	ventilation.
UPS shuts down		MultiLink shutdown	Consult the MultiLink user manual or contact your
UPS shuts down		MultiLink shutdown	LAN administrator.
			LAN administrator.
		Internal UPS fault, Fault Indicator	Contact your local dealer, Liebert representative
		Lit; continuous beep	or the Liebert Worldwide Support Group.
			Your UPS has received a signal or command
		UPS shutdown due to a command	from the attached computer. If this was
		from the communications port(s),	inadvertent, ensure the communication cable
		Load Level 0-25% Indicator	used is correct for your system. For assistance,
		illuminated	contact your local dealer, Liebert representative
			or the Liebert Worldwide Support Group.
			Check battery connections,
All Battery Level Indicators		UPS is unable to perform manual	completely power down and restart UPS.
All Battery Level Indicators		or remote battery test; beep every	NOTE: If the battery circuit opens while the UPS
flashing		or remote battery test; beep every	NOTE: If the battery circuit opens while the UPS
flashing		half second for five seconds	is running, it will be detected when the next
		half second for five seconds	is running, it will be detected when the next
			battery test is performed.

Battery Indicator illuminated		UPS failed battery test	Initiate battery test again.

		Batteries weak	Recharge batteries.
amber; long beep every minute		Batteries weak	Recharge batteries.
amber; long beep every minute
		Batteries need to be replaced	Replace batteries.

		Over temperature warning; beep	Make sure that the UPS is operating in 0°C to
Over Temp Indicator flashing		Over temperature warning; beep	40°C (32°F to 104°F) and that it has adequate
Over Temp Indicator flashing		every half second	40°C (32°F to 104°F) and that it has adequate
		every half second	ventilation.
			ventilation.

Fault Indicator lit but UPS is On		Fault warning; beep every half	Reset UPS.
Fault Indicator lit but UPS is On		second	Reset UPS.
		second

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.