Mastervolt CHARGEMASTER 24/20-3

OPERATION
8 August 2009 / Chargemaster1 12/35-3, 12/50-3, 24/20-3 & 24/30-3 / EN
3.3 DISPLAY
The Chargemaster is equipped with a multicolour LED
display. Different LED colours and combinations have
different meanings. Combination of the current display (A)
with the load bar shows the percentage of maximum
current, of the three Battery banks together.
Combination of (V) with the load bar shows the actual
charging voltage.
Figure 2: Display operation of the Chargemaster
3.4 THREE STEP CHARGE ALGORITHM
Figure 3: Three step Plus charge system
See figure 3. Battery charging is accomplished in three
automatic stages: BULK, ABSORPTION and FLOAT.
The first step of the three step Plus charge system is the
BULK phase, in which the output current of the charger is
100%, and the greater part of the capacity of the battery is
rapidly charged. The current charges the batteries and
gradually the voltage rises to the absorption voltage of
14.4V (12V models) or 28.8V (24V models) at 25°C / 77°F.
The duration of this phase depends on the ratio of battery
to charger capacity, and also on the degree to which the
batteries were discharged to begin with.
CHARGE CURRENT
BATTERY VOLTAGE
BULK
ABSORPTION
FLOAT
TIME
POWER
Hold POWER
pressed for 3
seconds to switch
the charger on/
Standby.
Illuminating
green = on,
red = standby.
INFO
Press INFO shortly
to switch display:
Current (A),
Voltage (V).
SOURCE
Press SOURCE to
select the battery
bank (1, 2 or 3) you
want to monitor.
Load bar
Current displa
y
to
g
ether with load ba
r
Voltage display together with load bar
Illuminates: MasterBus connected
Battery bank 1, 2, 3, selectable with
Source button.
Actual state of the 3-step
charging method:
Float, Absor
p
tion and Bulk.
Meaning Load bar display
Yellow Red
+ A + V
Current
100%
>14V Wrong
AC voltage**
Current
80%
13-14V Charger
failure**
Current
60%
12-13V Battery
voltage too
high**
Current
40%
11-12V Internal
temperature
too high**
Current
20%
10-11V,
Blinking:
10-10,5V
Battery low*,
short circuit.
Blinking: AC
not available
*At Battery low the bank number concerned is blinking.
Selecting an other bank is still possible then, the display
will return after 5 seconds.
**The Power button blinks.