Liebert PS600-60S, PS400-60S, PS250-60S user manual Resetting the Circuit Breaker, Alarm Conditions

RESETTING THE CIRCUIT BREAKER

If the UPS is overloaded, the circuit breaker (9) at the lower rear of the UPS activates to protect the UPS. If the circuit breaker activates, its center bar will extend. To reset the circuit breaker, simply push the bar back in. If the circuit breaker activates often, ask your dealer to check the UPS sizing or call Tech Support at 1-800-222-5877.

ALARM CONDITIONS

The 400 VA and 600 VA models sound alarms and flash visual indications at the front panel LED's (2, 3, 4) whenever they sense a power failure, low battery voltage (while on battery), an overload, or a utility overvoltage condition. The 250 VA model only sounds an alarm. Sometimes, a fault in your computer equipment may cause an overload alarm. See following page for alarm indications.

You may silence the On-Battery alarm on 400 VA and 600 VA models by pressing the BATTERY TEST button (5), on the rear panel. You must turn off your computer equipment and then turn off the UPS to silence an alarm on a 250 VA model.

Refer to the first table on the next page for recommended actions when alarms occur. Check this table first before calling for assistance. It diagnoses and solves common problems, and helps prevent potential problems.

PROBLEM	CAUSE	SOLUTION
UPS will not start	Input voltage below	Wait until utility voltage rises to appropriate level.
	threshold
	Overload/Short Circuit	Check circuit breaker at rear of UPS (9). If it is activated, reset it and restart
		the UPS (See "Resetting Circuit Breaker'). If problem persists, disconnect
		some of the equipment from UPS - the total wattage or all your equipment
		may exceed the capacity of the UPS. If it still will not start, check your
		computer equipment for short circuits. For further help, call your dealer.
	Input frequency mis-	Check Option Switch #1 on rear of UPS (6). Slide switch to left for OFF, to
	match with option switch	right for ON. OFF = 60 Hz, ON = 50 Hz. The UPS frequency must match
	setting	the frequency of your input utility supply.
	Utility overvoltage	Utility voltage must be less than 135 VAC.
UPS starts on	UPS not plugged in	Plug in power cord securely.
battery, but will not
switch to utility	Circuit breaker activated	Reset circuit breaker (see “Resetting Circuit Breaker”) and restart UPS.
power.
(400 & 600 VA	Power not available at	Call a qualified electrician.
only)	utility receptacle
UPS shuts down.	Overload/Short Circuit	Check circuit breaker at rear of UPS (9). If it is activated, reset it and restart
		the UPS (See "Resetting Circuit Breaker"). If problem persists, disconnect
		some of the equipment from UPS - the total wattage of all your equipment
		may exceed the capacity of the UPS. If it still will not start, check your
		computer equipment for short circuits. For further help, call your dealer.
	Low Battery	Turn OFF equipment and recharge UPS battery for at least 8 hours. If
		problem persists, replace battery.
	Sitenet 1 Shutdown	Consult the SiteNet 1 User Manual or contact your LAN administrator.
	(400 & 600 VA only)	9