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7.3. Trouble Shooting in Else Cases
Problem
Possible Cause
Remedy
No indication, no warning
tone even though system
is connected to mains
power supply
No input voltage
Check the building wiring and input
cable.
Check if the input breaker is closed
BYPASS LED light up
even though the power
supply is available
Inverter not switched
on
Press button to turn on UPS
BATTERY LED lights
up, and audible alarm
sounding every 1 beep
in every 4 seconds
Input voltage and/or
frequency are out of
tolerance
Check input power source
Check the building wiring and input
cable
Check if the input breaker is closed
Emergency supply
period shorter than
nominal value
Batteries not fully
charged / batteries
defect
Charge the batteries at least
12 hours and then check capacity
Please have the following information at hand before calling the After-Sales Service
Department:
1) Model number, serial number.
2) Date on which the problem occurred.
3) LCD/LED display information, Buzzer alarm status.
4) Mains power condition, load type and capacity, environment temperature,
DC under
Bus under Voltage
Consult dealer.
DC unbalance
Bus unbalance
Consult dealer.
DC soft fail
Bus soft start fail
Consult dealer.
Output soft fail
Output soft start fail
Consult dealer.
Output volt low
Output volt low
Consult dealer.
Output volt high
Output volt high
Consult dealer.
