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Vertiv I Liebert ITA2 30kVA I Manual
e) Press the power button of one UPS for 2 seconds, if 1 + 1 parallel POD is configured, press
power button of the UPS which is being tested in the parallel system, then press Enter key to
start the UPS. The run indicator (green) will blink, after 20 seconds, the inverter will start, and
the run indicator will turn ON, if 1 + 1 parallel POD is configured, the other UPS will display no
redundancy in parallel, ignore the prompt at the moment.
f) If the battery is not connected, the alarm indicator will be solid ON, and the buzzer will
beep every seconds. If the battery is connected, the alarm indicator will turn OFF.
g) If the UPS is working normally, press the power button for two seconds to turn OFF the
inverter.
h) Repeat the preceding step a) ~ step g) to power on and commission the inverter of other
UPSs respectively.
Carry out the parallel commissioning after each UPS is working normally.
2. After confirming that the inverter of each UPS is normal, commission the parallel system,
the specific procedures are as follows:
a) Close the external output MCB and input MCB of each UPS, and all UPSs are powered on
at the same time. After the start of the rectifier is finished, press the power button of one UPS
for two seconds, the run indicator (green) will be on. Measure whether the inverter output
voltage is normal. If the 1 + 1 parallel POD is configured, close the corresponding input MCB,
bypass MCB and output MCB of the POD.
b) Start the inverter of the second UPS, check whether there is an alarm on the LCD, and
confirm that the UPS parallel works normally.
c) Follow the methods to start inverter of the third or the fourth UPS to connect UPS into the
parallel system.
1. During the parallel power-on, confirm that the extenal output MCB of each UPS
has been closed, and that all the inverter output of the UPSs are connnted
parallelly.
2. During the parallel power-on, confirm that the system is working normally, and
then feed power to the load, to void load power failure.
3. If the user needs to add one UPS in the parallel system, follow the commissioning
procedures below:
a) Check and confirm that the power distribution mode, each power cable and signal cable of
the added UPS are well connected without short circuit. Check that the battery installation
and cables connection are correct without short circuit, and that the positive and negative
are correct.
