Operating Instruction
95950005
Operating Instruction
95950005
19
www.herthundbuss.com 18
EN
EN
Digital display
The “A/V” selector button selects voltage or
current display.
Battery charger features and ope-
rating modes
A) Operating modes: “Function”
Charge
Battery charging mode. There are 7 charging
steps, as described below:
• STEP 1:
Test 1. If battery output is above
6.5V, the unit proceeds with the next
step. Outputs below 6.5V will cause the
device to revert to stand-by.
• STEP 2:
Pre-charge. Charge starts at a
constant current, until battery voltage
reaches 13V.
STEP 3:
Test 2. Checks whether the
battery has short-circuited elements. The
battery charger stops supplying current
for 5 minutes. If during this time battery
voltage falls below 11.7V, the device re-
verts to stand-by. If voltage remains abo-
ve 11.7V, the battery charger moves on to
STEP 4. If any element short-circuits or
the battery becomes sulphate (as confir-
med by message ERR02 on the display
during STEp 3), the battery should be
charged in the RECOVERY mode.
STEP 4:
Deep cycle charging. The battery
charges until the set limit is reached.
STEP 5:
Constant voltage. Keeps the
battery at charge end voltage.
STEP 6:
Buffer. Voltage falls to the main-
tenance level and the charging cycle is
completed. The green FULL LED turns on.
STEP 7:
Pulsed current cycle. Pulsed
battery maintenance cycle (over long
periods).
Flash
Power Supplier mode assisting in motor
vehicle programming. No charge phase oc-
curs in it. It is just a power supplier stabi-
lized at rated battery voltage. It is designed
to deliver current supporting the battery, to
prevent it from going flat during operations
which require power for short or long peri-
ods of time.
Recovery
Recovery mode for sulphated batteries ac-
cessible by a prolonged press of the “Func-
tion” key. The screen displays the message
“rEC” and shows the instantaneous volta-
ge or current reading; during this step, the
„Charge“ LED flashes.
The battery charger performs a special char-
ging cycle, in which higher than average vol-
tages are forced, to attempt recovery of the
battery. In this mode, no error messages are
generated during the charging cycle; when
the cycle is completed, a message is dis-
played to indicate whether or not the battery
has been recovered on the basis of voltage
or current absorption. This mode has 6 char-
ging steps, as described below:
STEP 1:
Test 1. If battery output is abo-
ve 3V, the unit proceeds with the next
step. Outputs below 3V will cause the
device to revert to stand-by.
STEP 2:
Pre-charge. Charge starts at a
constant current, until battery voltage
reaches 13V.
STEP 3:
Deep cycle charging. The bat-
tery charges until the set limit value is
reached.
STEP 4:
Constant voltage. Keeps the
battery at charge end voltage.
STEP 5:
Buffer. Voltage falls to the
maintenance level and the charging
cycle is completed. The green FULL
LED will turn on.
STEP 6:
Pulsed current cycle. Pulsed
battery maintenance cycle (over long
periods).
ATTENTION
Because of the high voltage reached
during this charging cycle, the batte-
ry recovery process must be perfor-
med with the battery disconnected
from the motor vehicle. Recovery
with the battery connected to the
motor vehicle may result in damage
to the motor vehicle’s electronics.
Minimum battery voltage
If the initial voltage of the battery is lower
than 2.5V, the battery cannot be recovered.
B) “Flash” supply and charging mode:
“Amperage”
Preset supply current bands:
Flash 10A:
supply current set to 10A
Flash 30A:
supply current set to 30A
Flash 60A:
supply current set to 60A
Flash 120A:
supply current set to 120A
Preset charging bands to select connected
battery (output current adjusted automati-
cally)
Charge 10Ah – 100Ah:
Supports batteries
from 10Ah to 100Ah
Charge 100Ah – 300Ah:
Supports batte-
ries from 100Ah to 300Ah
Charge 300Ah – 600Ah:
Supports batte-
ries from 300Ah to 600Ah
Charge 600Ah – 1200Ah:
Supports all
batteries from a minimum of 600Ah to a
maximum of 1200Ah.
C) “Flash” supply voltage and supported
batteries: “Volt / Batt.”
Preset supply bands:
13.8V:
Supply voltage set to 13.8V
14.4V:
Supply voltage set to 14.4V
14.8V:
Supply voltage set to 14.8V
Preset battery types:
Wet:
Acid electrolyte batteries. Charge
end at 14.4V
Agm:
Flat plate Agm batteries or Optima
type spiral batteries. Charge end at 14.7V
LiFePO4:
LiFePO4 batteries
Saving settings
The battery charger saves the settings on
the front control panel. In the event of an
accidental power loss or voluntary power
off, when the charger is restarted, it will re-
start with the latest saved settings. With the
battery charger set to the FLASH mode, the
work cycle will resume automatically when
the power supply is restored.
Whereas in the CHARGE mode, the screen
