22
22
INV mode together. Measure the voltage on the JP1 and JP2 on
INV 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 difference
the voltage difference
between them is less than 1V. If the voltage difference is more
between 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 the
11) Measure the voltage of each JP2 on each UPS to check if the
voltage value is less than 5V (Generally 2V). If the difference is
voltage value is less than 5V (Generally 2V). If the difference is
more than 5V, that means the new UPS needs to be regulated
more than 5V, that means the new UPS needs to be regulated
again or you need to check that the parallel cable of the parallel
again 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 the
12) 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 the
the
maintenance switch from “BPS” to “UPS” and screw the
maintenance 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 parallel
13) 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, please
If the UPS is abnormal in the above debugging, please
perform maintenance according to the steps of removing a
perform 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 o
UPS of the
f the UPSs p
UPSs parallel system
arallel system
which is on normal running, press the OFF button of the UPS
which 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 UPS
be 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 brea
input breaker,
ker, the
the external mains
external mains input
input breaker,
breaker, the
the
output breaker and the battery switch of the UPS that will be
output 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 to
to
the Bypass mode, remove the cover board of each UPS and set
the Bypass mode, remove the cover board of each UPS and set
the maintenance switch from “UPS” to “BPS” and then turn off
the maintenance switch from “UPS” to “BPS” and then turn off
the input breaker of each UPS.
the input breaker of each UPS.