American Power Conversion 480kW manual Possible Alarms, Alarms Description Action

Alarms and Events

5.3Possible Alarms

	Alarms	Description	Action
1. Peak current limiter active		Peak current limiter activated and	Check for blown fuses in
		UPS switched to bypass operation.	installation
		System overload
2. Bypass power supply fault		Fault in redundant PSU for bypass.	Call for assistance
		UPS still 100% able to operate in
		all modes.
3. Delta current limiter active		Input current limiter activated and	Check for overload.
		UPS switched to bypass operation	If message is repetitive -
			call for assistance
4. Faulty fan		Blocked or faulty fan	Remove blocking or replace fan
5. High DC warning		Switching off big output load	If alarm is repeated, reduce load
			change
6. High DC shutdown		UPS fault	Call for assistance
7. Off-button activated		Off button or emergency power	–
		shut down activated
8. Synchronization error		UPS unable to synchronize with	Check if phase rotation of mains
		input frequency	input voltage is correct. If OK, call
			for assistance
9. Inverter voltage error		Inverter average voltage outside	–
		limits (normal message during
		system start-up/switch-off
10.	Parallel synchronization	Parallel UPS unable to	Check external parallel cables -
	error	synchronize	call for assistance
11.	Inverter current limiter active	Inverter overload	Reduce UPS output load
12.	Overload. Load exceeding	UPS overload	Reduce UPS output load
	100%
13.	Second power supply fault	UPS fault	Call for assistance
		(only systems > 160kW)
14.	Internal power supply fault	UPS fault. Only bypass operation	Call for assistance
		possible
15.	Battery MCCB is off	Battery MCCB/fuse not closed or	Close MCCB / insert new fuse. If
		released	released again -
			call for assistance.
16.	**Q004 off**	Output switch position for UPS in	–
		parallel
17.	**Q003 off**	External bypass switch position	–
18.	**Q002 off**	UPS output switch position	–
19.	**Q001 off**	UPS input switch position	–
20.	High temperature of isolation	Temperature of isolation input/	Check fan, check for airflow
	transformer	output transformer, too high	obstructions, check for overload
21. High temperature of main static		Temperature of static input switch,	Check fan, check for airflow
	switch	too high	obstructions, check for overload
22.	High temperature of bypass	Temperature of static bypass	Check fan, check for airflow
	static switch	switch, too high	obstructions, check for overload

990-4058GB

26 User Guide APC Silcon 480kW 400/415V UPS