JLG X390AJ-X14J Supplement Manual page 75

b. Lowest: It is the lowest cell (Volt). It should
be more than 3550 mV. Normally this data
concerns only one cell. Cell number is indi-
cated in the box "at" (in above case cell
number is 5).
c. Highest: It is the highest cell (Volt). It should
be approximately 3620/3630 Volt. Normally
the highest cell indicated in the box "at"
changes after a while.
d. Average: It is the average of the total cell val-
ues (Volt). Normally at the end of the equal-
ization phase, it should be between 3600
mV to 3630 mV.
After reading the above values, check the below
window:
At the end of the charge (cells equalization oper-
ation), the following values are shown on the
above window:
e. Voltage: It is the total level of the battery
pack voltage.
f. DMCC (A): It is the current required from the
BMS. For the period of the equalization
operation, it should change from 0 to 6-7
Ampere.
NOTE: If the power cable is not connected or at the start of
charge or as soon the power cable is connected, the
current required is the maximum. It should be 25A
or 18A depending on the country setting.
g. SOC (%): It is the level of the battery pack
charge. I t should be 100% when fully
charged.
h. Current (A): It is the real value of the current
measured by the LEM sensor. If there is the
sign "-" the current is going OUT from the
battery pack, if the sign is not present, the
current is going IN. Other values are not
important.
The BMS allows the charger to provide the maxi-
mum current (18A or 25A) until the first cell
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SECTION 3 - TROUBLESHOOTING AND FAULT CODES
reaches 3630 mV and then it reduces the cur-
rent. All the cells are connected in series, so BMS
must control the charge of all cells together.
However it can discharge the highest cell, con-
necting it to a resistance (there is one resistance
in BMS for every cell).
When a new cell reaches 3630 mV, the BMS will
connect it to its resistance, so at the end all the
cells will be charged at the same level and have
the same performances. Normally a fine battery
pack should have (at the end of the equalization
phase) the value Delta (mV) less than 50 mV, and
average value of approximately 3600 mV.
With a resulting Delta (mV) value more than 150
mV, and the highest cell already reached 3630
mV, record the voltage and the number of the
highest cells. Leave the machine under charge
overnight. If Delta condition remains the same,
replace the BMS.
F - Lead-Acid Battery is not charged by the system
Check the voltage of the Lead-acid battery. If it is
more than 12 Volt go to step 23, if not go to step
22.
22. Lead-acid battery voltage is less than 12 Volt.
Charge the battery by an external battery char-
ger and test the machine again.
23. Lead-acid battery voltage is more than 12 Volt.
Record the correct voltage on the Lead-acid bat-
tery and turn ON the machine. If the voltage
value is higher (12.8 Volt or more), go to step 24,
if not go to step 25.
24. Lead-acid battery voltage is higher when the
machine is ON (12.8 Volt or more).
To charge the Lead-acid battery, it is necessary to
leave the machine ON for some hours or it is nec-
essary to connect the power cable for some
hours. If the Lead-acid battery does not receive
charge, replace the Lead-acid battery.
25. Volt at the Lead-acid battery with the machine
ON is the same with the machine OFF.
In such case the DC-DC does not work. Check
fuse F7 if present and check Relay R1. If every-
thing is ok, check connections from the Lead-
acid battery and the DC-DC.
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