A phenomenon:
(l) When the switch can not be closed after the trip, after a period of time to cool down or can not be closed.
(2) UPS uninterruptible power supply can "work normally", but after the power failure that can not work.
(3) UPS can "work normally", but the automatic alarm.
Second, check and deal with the method:
(1) First, the load will be disconnected, and then check whether the UPS UPS can close the gate. Can be closed, that the load is too large or load equipment has a short circuit, and the UPS uninterruptible power supply itself is not faulty; can not be closed, check whether the UPS uninterruptible power supply switch is normal, not normal is to replace the switch, such as normal is to indicate that the secondary line is faulty, replacement.
(2) found after inspection in the work of the bypass light on the inverter circuit does not work, but through the bypass circuit using power supply directly for the equipment power supply; UPS uninterruptible power supply can work normally, but the battery use period has arrived or lack of maintenance can not be carried out normal inverter, should replace the battery.
(3) battery inverter work from time to time, the need for maintenance or replacement; battery life has reached, can not meet the design requirements also need to be replaced.
(4) connected to the battery metal wire contact is not reliable, sometimes good and sometimes bad, can replace the wire or metal connector.
(5) the ambient temperature is normal, the equipment temperature is too high; the integrated boards are cleaned and processed by the normal, it is due to poor ventilation. Can maintain ventilation, maintain environmental health and equipment clean.