REC ACTIVE BMS 4S
15
www.rec-bms.com
7
The temperature is
too low for charging
(under temperature
charging disable).
If cells are charged at temperatures
lower than operating temperature range,
cells are aging much faster than they
normally would, so charging is disabled
(2 °C temperature hysteresis).
Charging is disabled, discharging is
enabled. Charge optocoupler is disabled,
discharge optocoupler is enabled.
Wait until the battery’s
temperature rises to usable
range.
8
Temperature sensor
error.
Temperature sensor is un-plugged or not
working properly (2 s error hysteresis).
Charging is disabled, discharging is
disabled. Charge optocoupler is disabled,
discharge optocoupler is disabled.
Turn-off BMS unit and try to re-
plug the temp. sensor. If the BMS
still signals error 8, contact the
service. The temperature sensors
should be replaced.
9
Communication
error.
RS-485 Master-Slave communication
only.
10
Cell in short circuit or
BMS measurement
error.
Single or multiple cell voltage is close to
zero or out of range, indicating a blown
fuse, short circuit or measuring failure
(20 s error hyst 10 mV voltage
difference hysteresis).
Charging is disabled, discharging is
disabled. Charge optocoupler is disabled,
discharge optocoupler is disabled.
Turn-off the BMS and check the
cells connection to the BMS and
fuses. Restart the BMS.
If the same error starts to signal
again contact the service.
11
Main relay is in short
circuit.
If the main relay should be opened and
current is not zero or positive, the BMS
signals error 11. When the error is
detected, the BMS tries to un-shorten
the main relay by turning it ON and OFF
for three times.
Charging is disabled, discharging is
disabled. Charge optocoupler is disabled,
discharge optocoupler is disabled.
Restart the BMS unit. If the same
error starts to signal again
contact the service.
12
Error measuring
current.
Current sensor is disconnected or not
working properly.
Charging is disabled, discharging is
disabled. Charge optocoupler is disabled,
discharge optocoupler is disabled.
Turn-off the BMS and check the
sensor connections, re-plug the
current sensor connector. Turn
BMS back ON. If the BMS still
signals error 12, contact the
service.
13
Wrong cell chemistry
selected.
In some application the chemistry pre-
set is compulsory (5 s error hysteresis).
Charging is disabled, discharging is
disabled. Charge optocoupler is disabled,
discharge optocoupler is disabled.
Use PC Control Software to set
proper cell chemistry.
