Chapter 7. Troubleshooting - Delta 1KVA User Manual

7. TROUBLESHOOTING
Problem
ON/TEST button is not pushed.
UPS is not turned Battery low shut down and
on. utility is absent.
(No alarm, No LED
The rear panel input circuit
lights)
breaker is tripped. (Button is
tripped out)
UPS fault.
Batteries inside the UPS are
not fully charged.
UPS is overloaded.
UPS does not
provide expected
back-up time.
Batteries are weak.
Charger fault or other reason.
All LEDs light on. Internal UPS fault.
"REPLACE
BATTERY" LED Weak batteries.
lights on.
Incorrect transmission speed.
PC-UPS
communication does
not work properly.
Incorrect RS-232 connection.
No incoming utility.
UPS operates on
The rear panel input circuit
battery even though
breaker is tripped. (Button is
the line is in normal
out).
operating condition.
Very high, low or distorted
utility voltage.
Site wiring fault LED Wiring error such as reversed
(fault led flash). hot/neutral.
The exhaust fans and ventilation
UPS over grills may be obstructed.
temperature.
The environment temperature
exceeds 40
"FAULT"LED lights
UPS failure.
on, alarm beeps
"OVERLOAD" LED
lights on and buzzer Overloaded.
beeps continuously.
Possible Cause
o o
C (104 F).
2 0
SHEET 22 TO 23
Solution
Press the "ON TEST" button to turn on the
UPS.
(Refer section 4 to turn on the UPS.)
Waiting for line recovery.
1. Reduce some loads connected to the UPS.
2. Reset the circuit breaker. (Push
button in)
Call for qualified service personnel if above
actions do not solve the problem.
Recharge the batteries for at least 8 hours.
Remove some unnecessary loads.
Batteries weak faster when used often or
operating at higher temperature.
If the battery is near the end of its life, call for
service personnel. Replace the battery even if
the REPLACE BATTERY LED does not light.
Call for service.
1. Turn off UPS.
2. Call for service.
1. Recharge the batteries for at least 8
hours.
2. If problem remains Call for service
personnel to, replace the batteries.
Re-test after using another different
transmission speed.
Refer to communication interface (Section 8) of
this manual Re-connect the UPS with COM1 /
COM2 on PC again.
Check input power connection.
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.
Choose a well-ventilated area to position
your UPS to allow adequate dissipation of
heat.
Position your UPS in cooler area.
Call fore service engineer.
Remove some critical load.