5 Use and Operation
UPS IST7 (10KVA-40KVA)
User Manual
74
NO.
Fault symbol
Buzzer status
Meaning
abnormal
(alarm once
about every
2.0s)
frequency abnormal, phase sequence
abnormal, or mode setting mismatches the
wiring. Please check if the bypass breaker is
closed, if the bypass phase sequence is
normal, if the wiring way of bypass matches
the system mode setting.
23
Battery
abnormal
Slow beep
(alarm once
about every
2.0s)
Battery has been pressure protection, charging
fuse failure, over-pressure alarm fault, please
check the battery status is normal.
Urgent beep
(alarm once
about every
0.2s)
Battery wiring fault, charging short, under-
voltage protection, under-voltage warning
problem, please check the battery wiring and
the current state is normal.
No buzzer
warning
The battery charging temperature is too high.
24
Rectifier
abnormal
Urgent beep
(alarm once
about every
0.2s)
UPS rectifier fault.
25
Inverter
abnormal
Long beep
UPS inverter fault.