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5.2 Checking UPS function
Every time when conducting field maintenance, please check the regular function of the UPS,
including:
1. Check the operation status of the UPS
If the main voltage is within the specifications, the UPS should operate in normal mode; if
the main voltage is abnormal, the UPS should operate in battery mode. In both cases, there
should be no fault indication.
2. Check the transfer between the UPS operation modes
Disconnect the main input to simulate a mains failure, the UPS should transfer to battery
mode and operate normally; then recover the mains input, the UPS should transfer to
normal mode and operate normally
3. Check the LED indicators of the UPS
During the check processes stated above, check that the LED indication of the UPS agrees
with the UPS operation mode.
