Chapter 5 Operating Instructions 45
LIEBERT APM UPS Module And Parallel System 30kVA~150kVA User Manual
2. Close the external circuit breakers and connect the mains power.
The LCD starts up at this time. The Rectifier indicator flashes during the startup of rectifier. The rectifier enters normal
operation state, and after about 30s, the rectifier indicator goes steady green. After initialization, the bypass static
switch closes. The UPS Mimic LEDs will indicate as following:
LED Status
Rectifier indicator Green
Battery indicator Off
Bypass indicator Green
Inverter indicator Off
Load indicator Green
Status indicator Amber
3. Press INVERTER ON button for two seconds.
The inverter indicator flashes during the startup of inverter. 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 in normal mode. The UPS Mimic LEDs will indicate as following:
LED Status
Rectifier indicator Green
Battery indicator Off
Bypass indicator Off
Inverter indicatorchp888 Green
Output indicator Green
Status indicator Green
6.2.2
Procedures For Switching Between Operation Modes
Switch from normal mode to bypass mode
Press “inverter off” button to switch to bypass mode.
Note
In bypass mode, the load is directly fed by the mains power instead of the pure AC power from the inverter.
Switch from bypass mode to normal mode
Press “inverter on” button in bypass mode. After the inverter enters normal operation, the UPS transfers to normal
mode.
6.3 Battery Start
You can also use cold start mode with battery to start LIEBERT APM UPS from battery (charged) mode.
1. Verify that the battery is properly connected.
2. Press the battery start button (see Fig.
6-1) 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.
3. Press and hole the INVERTER ON key for two seconds, and the UPS operates in battery mode.
Battery start button
Fig.
6-1:
Location of battery start button
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