MY-A Series (10kVA-20kVA) UPS
User Manual
6 Use and Operation
93
NO.
Fault symbol
Buzzer status
Meaning
2.0s)
system works.
19
SCI fault
Long beep
UPS internal communication abnormal, if the
continuous alarm cannot be restored, please report
repair promptly.
20
There is no
redundancy in
the parallel UPS
Slow beep
(alarm once
about every
2.0s)
The total output load of the UPS parallel system
exceeds the full load of the single machine, check
that the output load exceeds the requirements for
redundant backups.
21
Main power
abnormal
Long beep
The mains power input phase sequence is
abnormal, please check the main power input
wiring.
3 continuous
alarms at 10s
intervals
The main power input occur lack N fault, power
down failure, overvoltage protection, under voltage
protection, over-frequency fault, under-frequency
fault, please check whether the main power input
status is normal.
22
Bypass
abnormal
Slow beep
(alarm once
about every
2.0s)
At mains status, the bypass voltage abnormal,
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.
