Liebert NX UPS System user manual Verify Switching Between Operation Modes

Models: NX UPS System

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Operating Procedures

5.Turn the rotary switch to NORMAL, then press the INVERTER ON control button for 2 seconds. The inverter will start and the inverter indicator will flash green. After the inverter is ready, the UPS transfers from bypass to inverter, the bypass indicator turns off and the inverter and load indicators turn on.

The UPS is operating normally. The UPS mimic display indicators will:

Indicator

State

Rectifier indicator

Green

Battery indicator

Off

Bypass indicator

Off

Inverter indicator

Green

Output indicator

Green

Status indicator

Green

6.2.2Verify Switching Between Operation Modes

Switch from normal mode to battery mode

Open CB1 to enter battery mode. This breaks the utility connection to the NX.

To return to normal mode, wait a few seconds and close CB1. The rectifier will restart automati- cally after 10 seconds and resume feeding power to the inverter.

Switch from Normal Mode to Bypass Mode

• Press INVERTER OFF button to switch to bypass mode.

NOTE

In bypass mode, the load is being powered by the utility and is not receiving conditioned power through the inverter.

Switch from Bypass Mode to Normal Mode

Turn the rotary switch to NORMAL.

In bypass mode, press the INVERTER ON button. When the inverter is ready, the UPS will switch to normal mode.

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Liebert NX UPS System user manual Verify Switching Between Operation Modes