Figure 88 Battery Equalizer Screen; Figure 89 Auto Screen; Figure 90 Manual Screen - Liebert 30-130kVA Operation And Maintenance Manual

Figure 88 Battery equalizer screen

From the Battery Equalizer Screen, you can choose one of the four options on the screen. The screens
for these options are illustrated below.

Figure 89 Auto screen

AUTO MODE—When the battery recharge control logic is in the AUTO MODE, the UPS battery
charger attempts the equalization process only if the EQUALIZE TIME PERIOD is greater than zero,
the battery voltage has been at or below the Battery Discharging alarm limit for longer than 30 sec-
onds, and the battery breaker (MBD) is closed.
MANUAL MODE. This mode enables the operator to manually initiate a battery equalize charge to
raise the DC bus voltage to correct a non-uniformity in the individual cell voltages or specific gravity
readings.

Figure 90 Manual screen

STOP EQUALIZE CHARGE—This selection lets the operator halt the equalizing charge to the bat-
tery at any time, whether the circuit was activated automatically or manually.
EQUALIZE TIME PERIOD. This selection permits the Operator to adjust the battery equalize time
in one hour increments from 0 to 72. The battery equalize time must be greater than zero for the bat-
tery to begin recharging in both the AUTO and the MANUAL modes. Use Up/Down buttons to set
battery equalize time and press SELECT.
BATTERY EQUALIZER
AUTO
MANUAL
EQUALIZE TIME PERIOD
EQUALIZE VOLTAGE
SAVE
AUTO
ENABLED
DISABLED
MANUAL
STOP
START
DISABLE
0
540
EXIT
60
Operation