Toshiba 1600XPi Series Installation And Operation Manual page 66

Fan failure;
Cause High internal ambient Chopper malfunction Inverter/chopper fault
temperature
Operation Mode After Bypass operation – Chopper and inverter are stopped
Shutdown – No output
Fault Inverter OL – Transfer to bypass
Audible Alarm Yes – Continuous buzzer
Visible Alarm Red Fault LED on
Fault relay closed
Relay Contact Alarm
Bypass relay closed
Auto-retransfer No
56 1600XPi Series UPS Installation and Operation Manual – 60616-014