5
STEP
2 & 3
Preparing
to charge
STEP 2
Battery SOC check
STEP 3
Temp° chec
k
Immediately following connection to a battery there may be a
1-2 second delay before charging progresses, during which time:
Battery State Of Charge is measured to determine charge requirement
and duration of the State Of Health test in STEP 9.
A low battery will
be tested for 12 hours.
safeTº:
Ambient temperature is measured to determine safe charge
current parameters. Maximum current will be reduced below
0ºC/32°F.
If the temperature is below -20ºC/-4°F no charging will be
allowed, indicated by LED #8 blinking rapidly.
For temperatures above -20°C / -4°F charge LED #3, 4 or 5 will turn
on and charging will proceed.
STEP
4, 5 & 6
SAVE
State Of
Charge:
Less than
50%
LED #3 : RED
Bms
Bms
3
Time to save a
battery
BMS auto reset
during STEP 4, 5 & 6
STEP 4
Below 17.6V
STEP 5
17.6V to 26.2V
STEP 6
TEST cell damage
The battery SAVE mode engages
if the battery is less than 50%
charged OR voltage is between 1 to 26.2 Volt.
IMPORTANT: Read the section
VERY FLAT NEGLECTED BATTERIES
on the preceding page.
A very flat battery should progress to STEP 7 within 4 hours, unless
damage has been detected, then charging will be suspended and
TEST LED #8 (red) will flash rapidly, indicating the battery may have
suffered permanent damage or a professional assessment is
required.
A deep discharged battery may not hold sufficient voltage to power its
own BMS system. The charger will attempt to automatically reset the
BMS during SAVE mode and continue charging. If charging did not
continue, use the MANUAL RESET: place and hold finger on BMS reset
button for 10 or more seconds, until the program continues to STEP 4.
VERY LOW VOLTAGE SAVE :
Current starts at 125mA and will
increase to 325mA depending on charge progress. If the voltage did
not rise above 17.6V within 2 hours, charging will be suspended and
the TEST LED #8 (red) will flash, indicating the battery may have
suffered permanent damage or a professional assessment is
required.
LOW VOLTAGE SAVE :
Maximum current is set to 1.25A. The battery's charge acceptance is
monitored for unusual behaviour.
TESTING (2 min) -
The battery's ability to hold charge is monitored. A
healthy LiFePO
4
battery will progress to STEP 7, otherwise charging
will be suspended and TEST LED #8 (red) will flash rapidly, indicating
the battery may have suffered permanent damage or a professional
assessment is required.
STEP 7
CHARGE
State Of
Charge:
50% - 75%
LED #4 : BLUE
4
The
ampmatic
™ CHARGE program automatically determines
the most efficient rate of charge current for the connected battery,
according to its state of charge, state of health, and electrical storage
(Ah) capacity. The delivered current may be anywhere from 1.25A to
5A (within normal
safeTº
temperatures, see page 5)
.
For batteries
with an electrical storage (Ah) capacity less than 10Ah charge current
is automatically adjusted lower to an average equal to battery Ah
capacity, e.g. a 2.5Ah / 2500mAh battery receive an average of 2.5
Amps.
NOTE:
For safety reasons there is an overall charge time limit of 24
hours up to STEP 7.
