Powervar Security Plus - Page 49

POWERVAR Security Plus UPS
49
Problem 3
UPS displays and UPS output are normal after start-up. However, the output stops as soon as
load is connected to it.
Possible cause #1: UPS is experiencing a severe overload or a circuit short circuit on the
output.
Solution: Reduce the load to an adequate amount, or check loads to locate a short circuit. In
many cases, short circuits are caused by shorted output adapters or damaged load equipment.
Possible cause #2: Failure to follow the proper load start-up sequence.
Solution: Restart the UPS with no output loads turned on. Then power on the largest loads first
and then smallest loads last.
Problem 4
The UPS works properly after start-up, and automatically shuts off after a certain period of
time.
Possible cause: The UPS is running on battery (either not powered by AC input or not
connected to AC input) and the battery is not fully charged.
Solution: Immediately turn off all switches, and restart the UPS. Verify that AC power is
present to the UPS input and that the UPS is operating normally. Charge the battery for a
minimum of four hours (preferably to full capacity) before returning to use. Note: Long-period
low voltage of the battery will shorten the service life of the battery.
Problem 5
After working for a certain period, with a normal input display, the buzzer gives intermittent
buzzing and displays battery low voltage simultaneously.
Possible cause: Input power supply has very low voltage causing the UPS work from its
battery. When the battery runs low, a low voltage battery condition occurs and the UPS enters
into protection status.
Solution: Determine cause of very low input voltage.
Problem 6
UPS is started and working. When a power outage occurs, the UPS fails to output power.
Possible cause: The battery is not connected to the UPS, the battery circuit breaker is open
(turn off), or the battery itself is severely damaged.
Solution: Verify that the UPS battery is properly connected, the battery circuit breaker is
closed (turned on) and that the battery itself is not damaged or defective.
Problem 7
If the “LINE” LED is flashing and the buzzer gives an intermittent alarm, this is alerting the user
of a Ground fault. The alarm works by checking for a neutral to ground bond. If the network is
unpolarized or has no neutral to ground bond follow the solution below.
Long term low voltage of the battery will shorten its service life.