5 Use and Operation
67
NO.
LCD
fault
symbol
Buzzer status
Meaning
15
Single Err.
Slow beep
Fall-off fault at one ends of the parallel wire.
16
PWR
Long beep
UPS internal working power failure, if it cannot be
automatically recovered, please report repair
promptly.
17
Fan fault
Urgent beep
(alarm once
about every 0.2s)
Fan fault warning prompt, please check the fan
for damage or blocking.
18
CAN fault
Slow beep(alarm
once about every
2.0s)
The CAN communication of parallel system
abnormal, please check if the parallel wire is
damaged or there is only one UPS in parallel
system works.
19
SCI fault
Long beep
UPS internal communication abnormal, if the
continuous alarm cannot be restored, please
report repair promptly.
20
No Redund
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
Grid Err.
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
BYP Err.
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
Summary of Contents for IST9
Page 1: ...l un I Jet _________ __ AEC IST9 1 0 20 https www uni jet com catalog ibp on line ibp aec ist9...
Page 2: ...UPS IST9 10 20 kVA User Manual...
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Page 52: ...3 Installation 43 Figure3 29 Diagram of 33 mode parallel system wiring of 10kVA 20kVA UPS...
Page 54: ...3 Installation 45 Figure3 31 Diagram of 33 mode parallel system wiring of 30kVA 40kVA UPS...
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