Leonics Ulta Series, User Manual

- 28 -

Symptoms

Possible Causes

Solutions

UPS operates normally

but the lamp no.3 is blink

or LCD display show over

load sign on the top bar of

load level display

UPS operates normally

but sounds a short beep

periodically or UPS switches

to backup power for a short

period and returns to

normal operating status.

When a black out occurs,

UPS supplies backup

power but it is still

supplying when the AC

source recovers.

4. If you follow steps 1- 3

and the  symptoms still

exist, the fuse might be

blown.

Loads which are connected

to Power Watcher ( UPS

output ) are exceed the

UPS rated capacity.

A power sag occurred in

too short a period for the

user to sense. But UPS can

detect that abnormal

condition.

The returned AC source's

voltage is too low for

ULTRA Series UPS to run in

normal operating mode.

Check fuse holder (for

ULTRA Series UPS 650VA or

smaller).  If fuse is blown,

replace with the spare fuse.

If the UPS does not

operate, please send it to

a LEONICS Service Center.

Reduce  loads to 75%.

(please keep the remain

25% available for

instantaneous power

consumption of the load

when it first starts. )

Do nothing, normal

operation.

- Turn off  loads and wait

until the AC source

returns to normal. Then

turn  on loads again.

or

- Use backup power from

UPS until  battery low

alarm alerts, then turn

off  loads and the UPS.

Wait until the AC source

returns to normal, then

- 29 -

Symptoms

Possible Causes

Solutions

UPS operates normally

but sometimes the

overload alarm alerts.

UPS does not supply

backup power during a

black out and the lamp

no. 8 to no.11 are all lit

(LED display only).

1. Loads are consuming

more power  than usual

at that time. Often this

is caused by a printer

when it is printing.

2. Overload may come

from a laser printer or

another load that

connected to the UPS

output outlet.

turn on loads and the

UPS again.

or

- If AC source is normal,

but the UPS still has the

same symptom, see

solution of the first

symptom In this list.

Reduce the loads.

Unplug laser printer from

the UPS output outlet and

plug into the socket for

laser printer (protected

from surge only).

1. Unplug all loads from

UPS. Shutdown the UPS

and restart again.

2. If the UPS still has the

same symptom, shut-

down the UPS and

follow battery replace-

ment  instructions.

Disconnect the red wire

from battery connector

5 minutes later, then

shutdown UPS and restart.