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INV mode together. Measure the voltage on the JP1 and JP2 onINV mode together. Measure the voltage on the JP1 and JP2 on
the terminal block of each UPS to check if the terminal block of each UPS to check if the voltage differencethe voltage difference
between them is less than 1V. If the voltage difference is morebetween them is less than 1V. If the voltage difference is more
than 1V, the output relay of the UPS may not be closed.than 1V, the output relay of the UPS may not be closed.
11) Measure the voltage of each JP2 on each UPS to check if the11) Measure the voltage of each JP2 on each UPS to check if the
voltage value is less than 5V (Generally 2V). If the difference isvoltage value is less than 5V (Generally 2V). If the difference is
more than 5V, that means the new UPS needs to be regulatedmore than 5V, that means the new UPS needs to be regulated
again or you need to check that the parallel cable of the parallelagain or you need to check that the parallel cable of the parallel
kit are normal.kit are normal.
12) After all of them transfer to the Bypass mode, remove the12) After all of them transfer to the Bypass mode, remove the
maintenance maintenance cover cover board board of of each each UPS UPS and and set set thethe
maintenance switch from “BPS” to “UPS” and screw themaintenance switch from “BPS” to “UPS” and screw the
maintenance cover board back again.maintenance cover board back again.
13) Turn on the UPSs in the Line mode to perform the parallel13) Turn on the UPSs in the Line mode to perform the parallel
operation.operation.
Note:Note:If the UPS is abnormal in the above debugging, pleaseIf the UPS is abnormal in the above debugging, please
perform maintenance according to the steps of removing aperform maintenance according to the steps of removing a
stand-alone.stand-alone.
3. Operational process of removing single UPS:3. Operational process of removing single UPS:
1) 1) If you If you need to need to remove remove one one UPS oUPS of the f the UPSs pUPSs parallel systemarallel system
which is on normal running, press the OFF button of the UPSwhich is on normal running, press the OFF button of the UPS
that is confirmed to that is confirmed to be removed twice continuously and the UPSbe removed twice continuously and the UPS
will cut off its output immediately.will cut off its output immediately.
2) 2) Turn Turn off off the the input breainput breaker, ker, the the external mains external mains input input breaker, breaker, thethe
output breaker and the battery switch of the UPS that will beoutput breaker and the battery switch of the UPS that will be
removed.removed.
3) 3) Press the Press the others UPSs’s others UPSs’s OFF OFF button. button. After After all of all of them transfer them transfer toto
the Bypass mode, remove the cover board of each UPS and setthe Bypass mode, remove the cover board of each UPS and set
the maintenance switch from “UPS” to “BPS” and then turn offthe maintenance switch from “UPS” to “BPS” and then turn off
the input breaker of each UPS.the input breaker of each UPS.
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