LEGRAND NUMERIC HP i 33 40 kVA Series User Manual page 86

Table 7-1. Trouble shooting
No. Abnormal phenomena
The UPS output is normal after
4
start, but once the load is turned
on, the UPS stops output
immediately.
The UPS works normally after
5
start up, but some time later, the
UPS shuts down automatically.
79
Possibl e reason
1. The UPS is in serious overload or the output circuit is
short circuit. It is necessary to reduce load to proper
capacity or find the reason for short circuit. Common
reason is output socket is short circuit or input short
circuit caused by device damage.
2. The load is not started according to the sequence from
large power device to small power device. You should
restart the UPS. After the UPS runs smoothly, start the
load according to the sequence from large power
device to small power device.
At the status of battery supply power, the battery runs out
and system protects for battery under-voltage, the UPS
shuts down automatically. This phenomenon is normal.
Once mains normal, system will start and charge battery
automatically.