Figure 3-5 Setting for parallel parameters
The user can change these settings according to actual needs, for instance two units are connected in parallel then in
the settings System parallel num will be 2; refer to Appendix 1 LCD Parameters Setting for details. After the
change, press the last item 'Sync parallel parameters' to validate the setting.
3.4.3 Power-On Commissioning for Parallel System
1. Set the parallel parameters of each UPS in the parallel system, then commission the inverter. The specific
commissioning procedures are as follows:
a) Make sure that the output MCBs of all UPSs in the parallel system are open, and then close the external input
MCB of each UPS in the parallel system, the UPS is powered on at the same time.
b) The LCD displays the self check screen, and the alarm indicator (red) and run indicator (green) are on at the
same time for about five seconds.
c) After the rectifier has been in normal operation state for about 30 seconds, the rectifier start-up is finished.
d) Refer to 3.5.2 Parallel System Parameters Setting for the parallel parameters setting for each UPS. Note whether
there is an alarm of 'Parallel comm. Fail', if yes, clear the fault according to Table 4-5. Carry out the following
procedures if the UPS is running normally.
e) Press the power button of one UPS for 2 seconds, then press the 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.
f) If the battery is not connected, the alarm indicator will be solid on, and the buzzer will beep every second. 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.
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