(1-10kVA) UPS IST3
User Manual
4 Operation and Maintenance
39
Fault symbol
Buzzer status
Meaning
BAT Long beep
Battery fault, battery voltage too low or too high
protection.
PRA Long beep
Parameters error in the parallel system. Please
check if the inverting voltage format or the
parallel mode setting(PRA mode and SGL mode)
is different.
PRL Long beep
Parallel wire in the parallel system disconnected.
PWR Long beep
Power failure. If it is abnormal, repair it in time.
CHG
Rapid beep (Alarm
once about every 0.2s)
1. Charger over-temperature protection(Please
check if the cooling fan in the charging board
failure);
2. Output short-circuit protection in the
charger.
BYP
Slow beep (Alarm
once about every 2.0s)
In the mains mode, bypass voltage or bypass
frequency abnormal. Please check if the bypass
breaker is switched on.
CAN
Slow beep (Alarm
once about every 2.0s)
CAN communication abnormal in the parallel
system. Please check if paralleled wire is damaged
or only a UPS in the parallel system powers on.
Load energy bars all
flicker
Rapid beep (Alarm
once about every 0.2s)
Output overload alarm. the output is going to
close, please reduce load.
Battery energy bar all
flicker
Slow beep (Alarm
once about every 2.0s)
Battery voltage is too high. Please check if battery
or charger failure.
Battery energy bars are
all off and the frame
flickers
Rapid beep (Alarm
once about every 0.2s)
Battery is about to run out. Please pay attention to
protect device and save you data in the PC.
The above information is for user to know some common fault diagnosis when UPS failure. If it may be
inner components failure, please contact the professional.
Summary of Contents for IST3 Series
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