Chapter 4 Operator Control And Display Panel 47
NX UPS Single Module And Parallel System 250kVA ~ 800kVA User Manual
Alarm
Explanation
Monitor flash update
Monitoring software being updated
Bypass flash update
Bypass software being updated
FLASH operate fail
Historical record not saved
Batt. float charging
Battery state (float charge mode)
Batt. boost charging
Battery state (boost charge mode)
Battery discharging
Battery state (discharge mode)
Input fuse fail
At least one rectifier input fuse is blown and the rectifier is off
Mains phase reversed
The AC input phase rotation is reversed
Soft start fail
Owing to low DC bus voltage, the rectifier cannot start
Input feedback
Battery voltage fed back to rectifier input
Mains freq. abnormal
The mains frequency is outside specifications and results in rectifier shutdown. Check the rectifier
input voltage and frequency
Input current abnormal
Battery load sharing imbalance or rectifier input current abnormal
Input ind. overtemp.
Input filtering inductor overtemperature
HF induct overtemp.
Rectifier or inverter high-frequency inductor overtemperature
Rectifier fault
Bus voltage abnormal or battery SCR shortcircuit
Charger fault
Battery charger voltage over limit
No battery
Check the battery and battery connection
Batt. converter fault
Bus voltage abnormal
Battery reverse
Reconnect battery and check battery wiring
SubBlock1 overcurrent
IGBT module 1 overcurrent
SubBlock2 overcurrent
IGBT module 2 overcurrent
SubBlock3 overcurrent
IGBT module 3 overcurrent
SubBlock1 overtemp.
IGBT module 1 overtemperature
SubBlock2 overtemp.
IGBT module 2 overtemperature
SubBlock3 overtemp.
IGBT module 3 overtemperature
SCR overtemp.
SCR overtemperature
Charger overtemp.
Charger overtemperature
Batt. port short
Battery port shortcircuit
Mains volt. abnormal
The mains voltage is outside specifications and results in rectifier shutdown. Check the rectifier input
phase voltage
Mains undervoltage
Mains voltage is under limit with derated load. Check the rectifier input line voltage
Control power fail
The UPS is operating but the control power is abnormal or not available
Dischg. curr. limit
Discharge current over limit
Fan power abnormal
Fan power failure
Input curr. over limit
Input current over limit
IGBT drv. cable fault
IGBT drive line connection fault
SCR fan abnormal
SCR fan abnormal
Charger fan abnormal
Charger module fan abnormal
SubBlock1 fan
abnormal
IGBT module 1 fan abnormal
SubBlock2 fan
abnormal
IGBT module 2 fan abnormal
SubBlock3 fan
abnormal
IGBT module 3 fan abnormal
Auxpower fan
abnormal
Auxiliary power fan abnormal
Rec. ind. fan abnormal
High-frequency inductor fan abnormal
Inverter asynchronous
This alarm is triggered by an inverter software routine when the inverter and bypass waveforms are
misaligned by more than six degrees in phase. The amplitude threshold is fixed for ±10% rating. This
alarm resets automatically once the condition is no longer true.
1. First check if the alarm Bypass unable to trace or Bypass abnormal occurs. If so, solve it first.
2. Check the waveform of the bypass voltage. If the bypass voltage waveform is seriously distorted,
rectify it
Inverter fault
Inverter output voltage outside specifications. Load transfers to bypass
