Chapter 5 UPS Operation Introduction 77
Liebert EXM 80kVA ~ 200kVA UPS User Manual
Figure 5-6 Setting ECO mode
4. When the rectifier start process is finished, start the system according to Section 5.2.1. After the inverter
runs normally, if the bypass voltage is within the range of ECO power supply, then the system works in
ECO mode; otherwise the system will transfer to inverter. The system will automatically work in ECO mode
after the bypass voltage is within the range of ECO power supply and lasts for five minutes.
5.2.3 Startup Procedures In Battery Mode (Battery Cold Start)
1. Verify that the battery has been connected, and that the battery voltage is transferred to the input
terminal of the battery.
2. Open the front door, and press the battery cold start button (see Figure 5-7 for its position) of any
module.
3. When the rectifier start process is finished, and the system is on Bypass (power flow shown in the Figure
below). Start the system according to steps 4~6 in Section 5.2.1.
Battery cold start button
Figure 5-7 Battery cold start button
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