OPTI-UPS DS120KC33 - Manual (Page 41)

5-3-2 Procedure for replacing battery
(1) Turning off the INVERTER
Push “OFF” button on the front panel and then push “ENTER” button to shut down UPS. At
that time the UPS enters into maintenance bypass mode.
(2) Switching into maintenance bypass mode
Turn switch “S6” to “ON” position and put in place its protective cover, and then turn off
switch of S5, S4, S3, S2 in sequence (only for some model), switch “S1” (“OFF” position).
(3) Replacing the battery
Wait for one minute and then remove iron sheet in front of the switch and battery apron.
Remove battery connection wiring and replace with a new battery. Connect the wiring again. (Be
sure to verify out put voltage and polarity after connecting wiring of batteries)
(4) Restarting UPS
After fixing battery apron and switch iron sheet in place, turn on switch “S1, S2”(for some
models only), “S3, S4” and “S5”. Turn the switch “S6” to “OFF” position and put in place its
protective cover. Remove the other switch metal cover and follow “UPS start up procedure” to
start up UPS.