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FES BATTERY PACK GEN2 Version 1.18
6. In normal mode green »BMS Power« LED of BMS is starting flashing. This means
that the BMS is turned ON, but not necessary balancing. Normally balancing starts
when one cell reaches pre-set value, usually 4,1V (could be changed by BMS
Control Software). If any of 14 green LED cell balancing indicators is ON, it means
that this cell has slightly higher voltage compared to the lowest one.
Possible scenarios:
1. If one or more cells have higher voltage levels that the others, it will
discharge them, the BMS temperature rise will be minimal.
2. If only one cell has lower voltage level than all the others, all higher cells
need to be balanced. This leads to higher BMS temperature, even if voltage
difference is only 0.010 V (10mV).
If upper BMS cooling plate of battery pack reach 50 °C, then cooling
ventilators starts working.
Somethimes in hot conditions, temperature of BMS cooling plate
could still rise despite of working ventilators. In such case when
temperature of cooling plate would reach 55 °C, CHARGER would
be switched off automatically. When temperature drops to 45 °C,
charger would start charging again.
7. Red »Error LED« is ON only during the initial test procedure. After the test is
finished it turns OFF. Some system errors are also indicated with red »Error LED«
by the number of ON blinks, followed by a longer OFF state. Number of blinks
identifies the error:
Number of blinks Error describtion
1
2
3
4
5
6
7
8
9
10
13
*Initial settings may be changed with BMS Control Software.
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 11 of 25
September 2017
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