Toshiba 1600EP SERIES Instruction Manual page 48

Protection Item
LCD Message
Cause
High ambient temperature
Operation Mode
After Fault
Audible Alarm Yes; continuous buzzer
Visible Alarm
Relay Contact
Alarm
Auto-retransfer
48
BUILT-IN UPS FAULT PROTECTION FUNCTIONS (CONT'D)
Internal Overheat
DC UNBALANCE
Fan failure;
Shutdown; no output
Red Fault LED "on"
Fault relay closed; Bypass relay closed
DC Circuit Overvoltage
DC-OV
Chopper malfunction
Bypass operation;
Chopper and inverter are stopped
Inverter OL: Transfer to bypass;
Yes; continuous buzzer
Red Fault LED "on"
No
DC Circuit Overcurrent
DC-OC
Inverter/chopper fault
1600EP Series Instruction Manual