Start-Up Procedures (Into Battery Mode, Battery Cold Start); Procedures For Transfer Between Operation Modes; Transfer From Normal Mode To Battery Mode; Transfer From Normal Mode To Bypass Mode - Liebert APM 150 User Manual

5.2.2 Start-Up Procedures (Into Battery Mode, Battery Cold Start)

1. Verify that the battery is properly connected.
2. Press the battery start button (see Figure 5-2) on the front panel of any power module.
At this point, the LCD displays the start screen, and the battery indicator flashes green. It stops flashing and
becomes solid green about 30 seconds after the rectifiers enter normal operation.
Note
After step 2, if any of the following conditions occurs, open the BCB or confirm that the BCB has tripped automatically
and is open. The system can be started up one minute later.
EPO action

Fault in system commissioning

3. Press and hole the INVERTER ON key for two seconds, and the UPS operates in battery mode.

5.3 Procedures For Transfer Between Operation Modes

5.3.1 Transfer From Normal Mode To Battery Mode

Open the input switch to cut off the mains input, and the UPS enters battery mode. To return to normal mode,
wait a few seconds and close the input switch to connect the mains power to the UPS. The rectifiers will restart
automatically after 10 seconds and resume feeding power to the inverters.

5.3.2 Transfer From Normal Mode To Bypass Mode

Press and hold the INVERTER OFF key for two seconds to transfer the UPS to bypass mode.
Note
In bypass mode, the load is being powered by the mains input and is not receiving conditioned power through the
inverters.

5.3.3 Transfer From Bypass Mode To Normal Mode

In bypass mode, press and hold the INVERTER ON key for two seconds. When the inverters are ready, the UPS
transfers to normal mode.

5.3.4 Transfer From Normal Mode To Maintenance Mode

When the UPS is operating in normal mode, use the following procedures to transfer the load from the
inverter output to the maintenance bypass.
Caution
Before performing this operation, read the messages on the LCD to be sure that bypass supply is normal and the
inverters are synchronous with it. If these conditions are not present, there is a risk of a short interruption in powering
the load.
Liebert APM 150 Integrated UPS Single Module And Parallel System
Figure 5-2 Location of battery start button
Chapter 5 Operating Instructions
Battery start button
User Manual
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