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FES BATTERY PACK GEN2 14S, Version 1.23
8. When first cell reaches 4.160V, charging current is reduced. If there is a big difference
between cells (more than 50mV) then it can take quite long until they all reach 4,16V,
as charging current is only 1A.
9. When finally, all cells reach 4.160V (+/- 2mV), then BMS send a signal to charger
to stop charging.
At this point
This is a clear sign that charging cycle is properly completed!
10. Switch OFF BMS on top of the Battery pack. Unplug charger from outlet. Unplug
charging cables and signal cable from Battery pack.
11. Charge second FES GEN2 battery pack!
Warning: Both battery packs must have approximately the same cell voltage
levels (close to 4.16 V per cell), before usage. Using two packs with too much
difference in voltage levels is not allowed!
Maximum 1V difference between total voltages of both packs is acceptable.
For instance, Pack 1: 58,1V (average 4.150 per cell), Pack 2: 57,1V (4,080V
per cell), this is just acceptable! Bigger voltage difference is not acceptable!
Caution: When thunderstorm is approaching, stop charging immediately and
disconnect the charger from the wall.
List of red error codes:
Number of red blinks Error description
1
2
3
4
5
6
7
8
9
10
13
*Initial settings may be changed with BMS Control Software.
Green
"Power LED" stops flashing and become
Single or multiple cell voltage is too high (4.2 V) *
Single or multiple cell voltage is too low (3.24 V) *
Cell voltages differ more than preset value (0.5 V) *
Cells temperature is too high (>55 °C) *
BMS temperature is too high (>50 °C) *
Number of cells is not set properly
Too low temperature for charging < -1°C
BMS do not recognize temperature sensor
Communication error
Measurement of cell below 0,1V or above 4,8V
Wrong chemistry set by BMS control software
Page 12 of 26
September 2019
continuously
Green.
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