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5 Maintenance
Checking UPS function25.
Every time when conducting field maintenance, please check the regular func-
tion 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.
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