Chapter 5 UPS Operation Instructions
This chapter gives a detailed description of the UPS operation procedures.
During the operation, the buzzer alarm may appear, at this point, you can press the key for three seconds to
silence the audible alarm.
5.1 UPS Start-Up
The start-up procedures can be performed after the installation is finished, the system has been commissioned by
authorized engineer and the external input MCBs are closed.
The start-up mode of the single UPS includes normal mode start-up and battery mode start-up; refer to 2.6.2 Normal
Mode Start-Up and 2.6.3 Battery Mode Start-Up for details.
5.2 Transfer Procedures Between Operating Modes
The Inverter operation mode includes Normal mode (mains inverter) and Battery module (battery inverter).
5.3 Transfer from Normal Mode to Battery Mode
In case of mains failure, the UPS will transfer to Battery mode. If you wish to transfer the UPS from Battery mode to
Normal mode, wait few seconds for mains input recovery. Ten seconds later, the rectifier will restart automatically,
and the inverter will restore the power.
5.4 Transfer from Inverter Mode to Bypass Mode
In standby mode, press and hold the power button. If the rectifier and inverter are normal, the interface shown in
Figure 5-1 will appear, select 'YES' to turn on the UPS.
1. No user accessable parts are located behind the protective covers that require a tool for removal.
2. Only qualified service personnel are authorized to remove such covers.
3. If maintenance for rack is needed, notice that the neutral line is live.
This procedure results in mains voltage being applied to the UPS output terminals. Confirm that the load
power is safe, if there is a load to be connected with the UPS output terminal. Ensure that the load is isolated
with the UPS output terminal, if the load is not ready for accepting the power.
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