Emerson Liebert NX 50 and 60 Hz - Manual (Page 114)

Operator Control Panel and Display
102
Auto start After UPS was shutdown at EOD, inverter auto starts when utility restore
REC FLASH UPDATE Rectifier firmware is being updated
INV FLASH UPDATE Inverter firmware is being updated
MONITOR FLASH UPDATE Monitor firmware is being updated
Input contactor fault Input contactor fault
Contactor P.S. 1 fault Contactor Power Supply board 1 Fault
Contactor P.S. 2 fault Contactor Power Supply board 2 Fault
LBS abnormal LBS is abnormal
DSP firmware error The inverter firmware does not match with the rectifier firmware.
Input Fuse
Fail Internal AC Input Fuse to Rectifier Failed. Rectifier shuts down. Battery
discharges. Not applicable for 30-40kVA models.
Input Disconnect Open AC mains input power switch open
Input Disconnect Closed AC mains input power switch closed
Maint. Disconnect Open Maintenance bypass power switch open
Maint. Disconnect Closed Maintenance bypass power switch closed
Bypass Disconnect Open AC bypass input power switch open
Bypass Disconnect Closed AC bypass input power switch closed
Output Disconnect Open UPS Output power switch open
Output Disconnect closed UPS Output power switch closed
Input Inductor Overtemp. Overheating of Rectifier input filter choke. Rectifier shuts down. Battery discharges.
Balancer Fault
Internal VDC(+) and VDC(-) off-set by over 50V exceeding the Inverter DC offset
compensation capacity. Inverter shuts down. Load transfers to bypass.
Balancer Over Current
Internal Inverter DC off-set balancing IGBT current rating exceeded 300%. Inverter
shuts down. Load transfers to bypass.
Balancer overtemp.
Inverter voltage offset control choke overheated. Inverter shuts down. Load
transfers to bypass.
Inv. Inductor Overtemp.
Inverter output filter choke overheated. Inverter shuts down. Load transfers to
bypass.
Batt. Converter Fault
Battery converter output voltage beyond limits or battery fuse failed. Battery
converter shuts down. Battety backup not available.
Batt. Conv. Over. Curr.
Battery converter overloaded. Battery converter shuts down. Battery backup not
available.
Batt. Converter Overtemp.
Overheating of Battery converter heatsinks. Battery converter shuts down. Battery
backup not available.
Output Disabled UPS Output Disabled (test mode)
Table 23 UPS messages
Message Description / Suggested Action (if any)