5 Maintenance and Troubleshooting
N1C L-Series(1-3kVA) UPS
User Manual
36
5.4 Troubleshooting
After starting UPS, if UPS works abnormally, please refer to Table5-1 to find possible reason.
Meanwhile, check whether the fault is caused by external environment, such as temperature, humidity
are not accordance with requirements or UPS is overload.
Table5-1 only includes some simple diagnosis. If the diagnosis is not clear, or not sufficient to solve
problem, please contact with local agency or dealer to deal with.
Table5-1
Troubleshooting
No.
Phenomenon
Possible reasons
1
The mains is normal. When starting
UPS, it can output 220V AC. But
UPS works in the battery inverting
status, and the buzzer beeps
intermittently.
Make poor connection in the contacts of grid feeding
circuit or sockets, which will lead to power input is
not expedite.
2
When starting UPS, it can output
220V AC. But UPS works in the
bypass status ("
" indicator is
always on.)
(1) The load exceeds the rated output capacity of
UPS. It should reduce load or select UPS with more
larger output capacity.
(2) It is normal that shock from load startup leads to
turn into bypass mode temporarily and recovery
automatically
3
After starting UPS, output is normal.
But when starting load, UPS will
stop output immediately.
(1) If UPS is serious overload or output is short
circuit, it should reduce load to proper or find reason
of short circuit. The common reason is that the output
multi-tap is short circuit, or the input is short circuit
after device is damaged,
(2) If you do not follow the startup sequence that is
"high power device
→
small power device" to start
load, restart UPS. When UPS works steadily, restart
load following the sequence.
4
After starting UPS, UPS works
normally. After a while, UPS will
shut down automatically.
In the battery mode, it is normal that UPS turns off
automatically when battery runs out and takes battery
low voltage protection. When mains is normal,
system will start automatically and charge battery.
