American Power Conversion 120-160kW manual Display will show invalid UPS data

Alarms and Events

	Alarms	Description	Action
23.	Main inverter failure	Temperature of main inverter, too	Check fan, check for airflow
		high or inverter fuse blown	obstructions, check for overload,
			check fuse
24.	High temperature of delta	Temperature of delta inverter, too	Check fan, check for airflow
	inverter	high	obstructions, check for overload
25.	Low DC shutdown	Battery discharged to minimum	Ensure battery recharging
		permissible level
26.	Low DC warning	Battery nearly discharged	Save your data now
27.	Mains momentarily outside	Short disturbances on mains	–
	tolerance	supply (1 ms transients)
28.	Mains outside tolerance	Mains input voltage R.M.S. value	–
		outside tolerance
29.	Mains frequency outside	Mains input frequency outside	–
	tolerance	tolerance
30.	Bypass momentarily outside	Short disturbances on bypass	–
	tolerance	voltage
31.	Bypass outside tolerance	Bypass input voltage outside	–
		tolerance
32.	Bypass frequency outside	Bypass input frequency outside	–
	tolerance	tolerance
33.	Output momentarily outside	Short disturbance on output	If message reappears -
	tolerance	voltage (inrush current)	call for assistance
34.	Output outside tolerance	Output voltage outside tolerance	Call for assistance
35.	Output frequency outside	Output frequency outside	Call for assistance
	tolerance	tolerance
36.	High battery temperature	Battery ambient temperature too	Check system ambient
		high	temperature, check fan, check for
			airflow obstructions
37.	Battery weak	Battery capacity below 75% or	Test battery capacity
		battery MCCB/fuse switched off
38.	Battery defective	Insufficient battery capacity or	Call for assistance
		battery MCCB/fuse switched off
39.	System locked in operation	UPS has made 10 attempts within	Unlock.
	mode	1 minute to switch from bypass to	If message reappears -
		battery operation, or “High DC	call for assistance
		warning” has appeared 10-20
		times within 1 minute
40.	RAM1 memory write error	UPS fault	Call for assistance
41.	Memory write error	UPS fault	Call for assistance
42.	Communication to VQ bypass	UPS fault	Call for assistance
	lost
43.	Communication to VQ output	UPS fault	Call for assistance
	lost
44.	Communication to DMU lost	UPS fault	Call for assistance
45.	Communication to controller	UPS fault.	Call for assistance
	lost	Display will show invalid UPS data

990-4036

User Guide APC Silcon 120-160kW 400V UPS 27