FAQ Categories: 7400WX

It depends on the thermal sensor mounted near SCR. When the thermal sensor operates, stop the SCR gate drive. Then, UPS will display “WARNING” on LCD, and store a log “TEMP ALARM (STS)”.
In the case of the parallel redundant UPS, the UPS that detects the abnormal temperature is disconnected (parallel-off). And the normal UPS(s) continues to supply power to the critical load.

Yes. 2 fans are connected to one power supply. And 3 power supplies are connected to one control transformer.

Yes, 4 fans on the top and 2 fans on the front for SCR. Fuji has verified a single power supply failure. That means that 2 fans failure simulated.

No, it is not. Only one type of caution message is displayed. Please visually check it because you do not know which fan has failed.

Each fan has a speed alarm. When any one alarm is detected, UPS will display “CAUTION” on LCD, and store a log “CTR FAN ERROR”. CTR-M continues running.

UPS will continue running until IGBT thermal sensor operates (rectifier, inverter or chopper).

Yes, on the top. Fuji has verified a single power supply failure. That means that 2 fans failure simulated.

No, it is not. Only one type of caution message is displayed. Please visually check it because you do not know which fan has failed.

Each fan has a speed alarm. When any one alarm is detected, UPS will display “CAUTION” on LCD, and store a log “FAN ERROR”. UPM continues running.