31
243 Grid input breaker open
The effective value of the three-phase
input voltage is lower than 35%
1. Check whether the mains input air
switch is disconnected;
2. Check whether the mains input
insurance is damaged;
245 UPS maintenance breaker
close
Maintenance bypass closed signal
trigger
Check whether the maintenance
bypass cover is loose;
246 UPS bypass breaker open
The effective value of the three-phase
bypass voltage is lower than 35%
Check whether the bypass air circuit
breaker is disconnected;
337 Same address of multiple
inverter
Parallel addresses are the same
Please check whether the addresses of
each UPS in the parallel system are
duplicated
366 Frequency beyond tracing
range
The bypass frequency exceeds the set
tracking range
Check whether the bypass voltage is
abnormal
368 Bypass phase overvoltage
Bypass voltage out of set range
Check whether the bypass voltage is
abnormal
369 Bypass phase undervoltage Bypass voltage is lower than set range Check whether the bypass voltage is
abnormal
370 Bypass overfrequence
Bypass frequency out of set range
Check whether the bypass voltage is
abnormal
371 Bypass underfrequence
Bypass frequency out of set range
Check whether the bypass voltage is
abnormal
372 Bypass phase sequence error Bypass reversed
Check whether the bypass phase
sequence is reversed
373 Bypass phase loss
Bypass missing 1 or 2 phases
Check whether the bypass voltage is
abnormal
374 Bypass phase volt imbalance Bypass voltage is not 120 degree
symmetrical
Check whether the bypass voltage is
abnormal
375 Bypass voltage rapid
inspection abnormal
Bypass instantaneous voltage is higher
than 1.25 times or lower than 0.8
times rated voltage
Check whether the bypass voltage is
abnormal
418 Battery maintenance
reminder
Battery maintenance reminder time is
up
Maintaining Batteries: Perform
Battery Test 2
423 Battery self check fail
There is an abnormal PFC alarm
during the battery test
Please replace the power board
464 Input overvoltage
Input voltage higher than 280V
Check whether the mains input
voltage is abnormal
465 Input undervoltage
Input voltage below 132V
Check whether the mains input
voltage is abnormal
466 Input overfrequence
Input frequency higher than 70Hz
Check whether the mains input
voltage is abnormal
467 Input underfrequence
Input frequency below 40Hz
Check whether the mains input
voltage is abnormal
