JLG X390AJ-X14J Supplement Manual page 35

SECTION 2 - SERVICE PROCEDURE
Upper Section
Lower Section
The two fans are activated at the same time when average
temperature of the battery pack is more than 30°C. If the
temperature of the battery pack is more than 50°C, the
internal contactor opens. The power to the machine is
then cut to allow cooling of the system.
2-22
In the 1st generation system, the fans are managed by a
timer T1 (shown below) which is controlled by the BMS.
When the internal temperature is high, the BMS sends sig-
nal to the timer coil that sends signal to the two fans for a
set time. After this time, if temperature is still high, the
timer is activated again.
In the 2nd and 3rd generation system, BMS controls the
fans when necessary.
MAF11650
MAF11660
31215460