Operation with Advanced Microprocessor Controls

2.5.3Run Diagnostics

By selecting Run Diagnostics, maintenance personnel can check system inputs, outputs, and complete a test of the microcontroller circuit board, all from the front panel. Review of the system inputs and the microcontroller test can be done without interrupting normal operation. To test the system out- puts, the normal system control is temporarily suspended. DO NOT leave the unit in the diagnostics mode any longer than is necessary for troubleshooting. The control system will return to normal oper- ation in 5 minutes, automatically, if no key is pressed.

Show Inputs

With the unit on and the fan running, the input state for the following devices may be displayed:

Air sail switch: normally off unless Loss of Air Alarm is active

Custom alarm #1: normally off unless this alarm is active

Custom alarm #2: normally off unless this alarm is active

Custom alarm #3: normally off unless this alarm is active

Custom alarm #4: normally off unless this alarm is active

Humidifier problem: normally on unless this alarm is active

Filter clog: normally off unless Change Filters Alarm is active

Main fan overload: normally on unless Main Fan Overload Alarm is active

Shutdown device: normally on unless unit is off through the Fire Stat or Remote Shutdown Device

Low press switch: normally on if compressor circuit is in operation

Comp overload: normally on unless Compressor Overload Alarm is active

High head comp: normally off unless High Head Pressure alarm Compressor is active

Test Outputs

When this feature is selected, the unit is effectively turned off. When stepping from one load to the next, the previous load, if on, is turned off automatically. The loads can also be toggled ON/OFF by selecting “ENTER.” Once turned on, the output will remain on for 5 minutes unless toggled off or the Test Outputs function is exited by selecting “MENU/ESC.” (The compressor is limited to 15 seconds on to prevent damage.) The outputs are as follows:

• Main fan: main fan contactor

• Comp: compressor contactor

• LLSV: liquid line solenoid valve

• HGBP/CUV: hot gas bypass or compressor unloader valve (on certain units)

• Part coil: part coil solenoid valve

• CWV/CGV: chilled water or GLYCOOL valve

• R5 Relay: Relay 5 (heat rejection)

• Reheat 1: Reheat 1 contactor (also energizes fan for safety) or SCR Reheats

• Reheat 2: Reheat 2 contactor (also energizes fan for safety)

• HWR: hot water solenoid valve

• Humidifier: humidifier contactor (also energizes humidifier makeup valve and fan for safety)

• HMV: humidifier makeup valve

• Comm alarm: common alarm relay

! CAUTION

Do not test a compressor output for more than a few seconds. Compressor damage could result!

Test Control Board

By selecting this function, the microcontroller will perform a self test lasting approximately 10 sec- onds. At the end of the test, the ROM checksum, ROM part number and version number will be dis- played.

12

Page 20
Image 20
Liebert 3000 manual Run Diagnostics, Show Inputs, Test Outputs, Test Control Board

3000 specifications

The Liebert 3000 is a cutting-edge power protection solution designed to provide reliable and efficient backup power for critical applications. This uninterruptible power supply (UPS) system is engineered to safeguard sensitive electronic equipment from power disturbances, ensuring uninterrupted operations in data centers, telecommunications, and industrial environments.

One of the standout features of the Liebert 3000 is its high-efficiency design. With an efficiency rating of up to 94%, the system minimizes energy loss, resulting in lower operational costs and a reduced carbon footprint. This is particularly important in today's environmentally conscious climate, as organizations strive to meet sustainability goals while maintaining top-tier performance.

The Liebert 3000 employs advanced technologies to enhance its functionality. It incorporates online double-conversion technology, which provides a continuous supply of clean and regulated power. This technology ensures that connected loads receive stable voltage and frequency, shielding them from voltage spikes, sags, and outages. Additionally, the UPS offers features such as automatic battery testing, which helps ensure peak battery performance and reliability.

Another key characteristic of the Liebert 3000 is its modular design, allowing for flexible scalability. This means that organizations can easily expand the capacity of their UPS system as their power needs grow, without the need for extensive system overhauls. The modular architecture also facilitates simplified maintenance and reduces downtime, as individual modules can be serviced without interrupting power to the critical load.

The system is equipped with comprehensive monitoring and management capabilities. The Liebert 3000 provides real-time data on power usage, battery status, and system performance, enabling facility managers to make informed decisions and proactively address potential issues. The integration of remote management tools allows for seamless monitoring from anywhere, providing peace of mind for operators.

Overall, the Liebert 3000 combines high efficiency, advanced technology, and flexible design to deliver a robust power protection solution. Its reliability and performance make it a preferred choice for organizations seeking to protect their critical infrastructure while enhancing operational efficiency and sustainability. As businesses continue to rely on technology for their everyday operations, the Liebert 3000 stands out as a dependable safeguard against the uncertainties of power quality.