280ES / 420ES / 650ES / 1000ES / 1400ES
31
5.1 Troubleshooting Chart
Problem
Possible Cause
Corrective Action
UPS can not turn on and
has no alarm.
UPS front panel on/off
switch has not been
pressed.
Hold the On/Off switch for
two seconds.
Battery LED (
amber
) is lit
and UPS beeps every 4
seconds when
No incoming line or very
low or very high line
voltage.
Check the wall socket and
test the input line voltage.
Incoming line is thought to
be normal.
UPS input power cord is
not plugged in.
Plug in input power cord.
Rear panel circuit breaker
is tripped.
Reduce the load and press
the circuit breaker button
back in. (1x0V)
The UPS Overload LED
(
red
) is always lit & there
is a continuous sounding
alarm.
UPS is overloaded.
Remove the least critical
devices from the load.
The UPS Battery Weak
LED (
red
) is always lit.
Too low battery voltage.
Dead battery.
Recharge the battery and
reset.
Site Wiring Fault LED is
on.
Site wiring problem.
Call an electrician to check
your wiring.
UPS transfers to back-up
mode easily.
Transfer point voltage is
set too high or too low.
Use
OPTI-SAFE™+,
or the
dip switches on the rear
panel to lower the low
voltage transfer point and
raise the high voltage
transfer point.
Backup time is less
Than the rating.
Battery is not fully charged
or battery is dead.
Plug the UPS into an AC
outlet and recharge the
battery for 6 hours. If
problem remains, replace
the battery.
UPS appears to be
functioning normally but
the computer won’t turn
on.
Computer input power
cord is loose or not
connected.
Check the computer input
power cord.
UPS is in back-up mode
but the alarm is not
beeping.
The UPS has been
configured to Delay the
Audible Alarm.
Use
OPTI-SAFE™+
to
reprogram the EEPROM of
the UPS.
Software communication
not working
Wrong interface cable.
Purchase the correct one
from your distributor.
