OPTI-UPS DS160KD33 - Manual (Page 78)

9-1
9. HELP
Abnormal Description & Checkpoint Solution
(1) AC input is
right, but
rectifier does
not operate and
RECT AC
FAIL LED
lights up.
The rectifier breaer has 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 lit up too.
Correct the R.S.T. phase
sequence. Generally, to
exchange any two phases
connection can solve this
problem.
If the abnormal cannot be improved as the
aforesaid solution action has been taken. Refer to PCB LED
Detecting Guide and check
the 3C PCB.
(2) The UPS
shutdown
under AC
mains failure.
The battery fuse (breaker/holder/dis-
connector) has not been closed. Close the battery fuse
breaker/holder/dis-
connector.
(3) No power
supply for UPS
control circuit
while LCD
cannot display.
The reserve breaker has not been closed
(switched on). Close the reserve breaker.
3B PCB has problem. Refer to PCB LED
Detecting Guide and check
the 3B PCB.