OnLine Power Battery Backup System - Manual (Page 66)

OLP
Three Phase UPS Systems
8.0 HELP
8-1
8. HELP
Followings are some abnormal situations frequently asked and common solution is
offered for trouble-shooting.
Abnormal Description & Checkpoint Solution
The rectifier breaker is not switch on.
Switch on the rectifier
breaker.
The input voltage is not correct (out of
the normal range). Connect the right AC
source.
The phase sequence of AC input is
incorrect, input rotation error, and the
LCD will display warning message
“RECT PHASE ERROR” in the
STATUS/WARN menu (MAIN menu →
SELECT menu → STATUS/WARN
menu). ROTATION ERROR LED on
left side of the front panel will also
light.
Correct the R.S.T. phase
sequence. Generally, to
exchange any two phases
connection can solve this
problem.
(1) AC input
is correct, but
rectifier does
not operate
and RECT AC
FAIL LED
lights up.
If the abnormality cannot be corrected
when the solution actions have been
taken. Refer to PCB LED
Detecting Guide and
check the 3C PCB.
(2) The UPS
shuts down
under AC
mains failure.
The battery fuse (breaker/holder/dis-
connector) has not been closed. Close the battery fuse
breaker/holder/dis-
connector.
The reserve breaker has not been closed
(switched on).
Close the reserve breaker.
(3) No power
supply for
UPS control
circuit and
LCD cannot
display.
3B PCB has problem. Refer to PCB LED
Detecting Guide and
check the 3B PCB.