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PROBLEM POSSIBLE CAUSE SOLUTION
Troubleshooting
UPS over temperature.
( BUCK, BOOST,
NORMAL, ON
BATTERY LEDs light)
All LEDs light.
1. Turn off UPS.
2. Call for service.
1. Recharge the batteries
for at least 4 hours.
2. If problem remains,
replace the batteries.
Re-test after using
another different
transmission speed.
Re-connect the UPS with
COM1 / COM2 on PC
again.
1. Reduce some loads
connected to the UPS.
2. Reset the circuit
breaker. (Push button in)
Have qualified electrician
check the input voltage.
Get wiring checked by
electrician.
Position your UPS in
cooler area.
Internal UPS fault.
Weak batteries.
Incorrect transmission
speed.
Incorrect RS-232
connection.
The rear panel circuit
breaker is tripped. (Button
is out)
Very high, low, or
distorted utility voltage.
Wiring error such as
reversed hot/neutral.
The environment
temperature exceeds
40°C (104°F).
PC-UPS communication
does not work
properly.
'REPLACE BATTERY'
LED lights.
UPS operates on
battery even though
good line voltage may
be present.
P73335u_UPS_man.qxd 4/30/01 12:19 PM Page 20