C h apter 8 M ain ten an ce 85
L iebert E X S 30 kV A A n d 4 0 kV A U P S U ser M an ual
8.5
C h eck in g U P S F u n ctio n s
N o te
U P S fun ction s ch eck procedures m ay cause pow er in terruption to load!
W e recom m end checking the U P S functions reg ularly.
B ackup the load data before conducting the U P S functional check . T he procedures are as follow s:
1. Pre ss the pow er button to check if the buzzer beeps, the indicators are on and the LC D display is norm al.
2 . Pre ss the ESC key and check again that the indicators are on, the LC D display is norm al, and that the U P S
has been transferred to inverter m ode.
