Liebert 1000kVA

Operation

Figure 65 Module start-up procedures screen

Select the Walk-In screen on the LCD.

Step 3. To energize the UPS module, manually close the input circuit breaker (CB1, Figure 8). This

will provide power to the rectifier. Use the Walk-In screen to monitor the Module DC Bus voltage.

The Input Amps bars should settle at 25% or less after the momentary inrush current has subsided.

Verify that the DC Voltage bar begins to gradually move to the right.

Verify that the Output Voltage bar moves to the right after the DC Voltage bar has reached the 90%

level. Both bars should settle near the 100% line.

Select the Monitor/Mimic display from the Master Menu and confirm that the module DC bus and

AC output are at their proper operating voltages.

Step 4. When the Module DC Bus voltage is at 100%, you can manually close the module battery dis-

connect (MBD) circuit breaker (external to the UPS).

!WARNING

If any abnormal situation occurs during this walk-in procedure, open the input circuit breaker

and investigate the problem. Each input amps bar should be within 25% of the average bar

length. Call Liebert Global Services if you need help.

START-UP PROCEDURES

1. Verify that the control power is applied to the system control cabinet (check the display

on the system control cabinet).

2. Wait approximately two (2) minutes before attempting any other action .

3. Select "SYSTEM CONFIGURATION" screen to verify that the correct model is

displayed.

4. Select "WALK-IN" screen and do the following:

a) Close module input circuit breaker. Verify that the DC voltage bar on

the display begins to gradually move to the right and the AC input

current bars do not move to the right more than 10% (40% for modules

with input filters) after the transformer inrush has subsided.

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START-UP PROCEDURES (Cont'd)

b) Verify that the output voltage bar moves to the right after the DC

bus bar has reached the 90% point. Both bars should settle near

their respective 100% levels.

c) If anything happens on the display not mentioned in (a) or (b),

immediately open the module input circuit breaker and investigate.

5. If step 4 is successful, select "MONITOR/MIMIC" screen and verify module

DC bus and output voltages are at proper nominal level. If so, close

module battery circuit breaker.

6. If no alarms are present on the "MONITOR/MIMIC" screen, the module may be

placed online by closing the module output breaker.

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