JLG X390AJ-X14J Supplement Manual page 102

SECTION 3 - TROUBLESHOOTING AND FAULT CODES
Third Group - Temperature Sensors
1. lowest - at: It is the lowest temperature. The sen-
sor number is indicated on the side.
2. Highest - at: It is the highest temperature. The
sensor number is indicated on the side.
3. Average: It is the average value of temperature.
4. Electronics: It is the internal temperature of the
BMS.
5. Radiator (only for 1st generation BMS): It is the
temperature of the BMS cooler. During the
equalization phase, the radiator temperature
increases as one or more cells are connected to
the resistance to be discharged.
See below image for details of all temperature
sensors on a 48 Volt battery pack.
NOTE: The highest and the lowest temperature value must
be approximately same.
3-40
MAF12280
NOTE: In the battery pack, temperature sensors are used to
NOTE: Cells resistance is important to identify a defective
NOTE: The cell resistance also depends on the how tight
MAF12290
Fourth Group - Contactor Opening (only for 2nd
Generation BMS)
Open: Current supply is not allowed.
Closed: Current supply is allowed.
Internal contactor status called "Main Contactor",
is controlled by the BMS.
switch ON/OFF. They close the lines if the internal
temperature reaches 70 °C. In this case, or if a sensor
detects a high temperature, a specific failure code is
shown in the window Emergency Error Code.
Fifth Group - Cell Resistance (mOhm) (only for 1st
Generation BMS)
1. Lowest - at: It is the lowest resistance of the cells.
The cell number is showed on side.
2. Highest - at: It is the highest resistance of the
cells. The cell number is showed on side.
3. Average: It is the average of all cell resistance.
cell or a bad cell connection. The value of the resis-
tance can be different depending on many causes.
However, a warm cell normally has a resistance
value of 1 ohm or less.
To make sure a cell is moderately hot, it is sufficient
to move the machine for some minutes, or to leave
the battery pack under charge for some hours. At
the end of the charge, the cells resistance value
increases.
the cell screws are tightened. In case one or more
cell resistance is high, it is necessary to open the bat-
tery pack and check to make certain the screw are
tight of the cells.
MAF12300
MAF12310
31215460