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4. The operations for the parallel system
1) Shut down the UPS.
If users want to shut down one UPS or all UPSs, please operate as below.
First turn off the battery switch, and then turn off BS1 and MS1 one by one, and finally turn off OS1,
the first UPS will be off.
If users want to shut down the second and the third UPS, please operate as above, but must note
whether the remaining capacity of the system can meet the load capacity.
2) Transfer the parallel system to the maintenance bypass mode from the normal mode.
please operate as below.
a) Operate “Transfer to Bypass” on the display screen of any one UPS, all UPSs will transfer to the
bypass mode at the same time.
b) Remove the metal plate on the manual bypass switch of the UPS, and then it switch to bypass.
c) Turn ON the maintenance switch MBS.
d) Turn off all the battery switches one by one.
e) Turn off MS1, MS2 and MS3.
f) Turn off BS1, BS2 and BS3.
g) Turn off OS1, OS2, OS3 and OS. All UPSs will be off; the load is powered by the maintenance bypass.
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