Pylontech PowerCube-H1-V2 - Page 39

BMS Internal bus
error（Bit9）
Comm. and
hardware
CMU internal error
or I2C issue
BMIC error
（Bit8）
Comm. and
hardware
Sensor chip error
Shutdown circuit
error
（Bit7）
Hardware
Cannot completely
switch off the system
during self-protection
Battery damage
error
（Bit6）
Battery cell
Battery cell voltage
measured at <2.0V
Relay Error
（Bit5）
Hardware
1.Start-up procedure
problem
2. Relay adhesion
3. Relay damage
1. Completely switch off inverter and
battery system. Make sure DCBUS has
no voltage.
2. Switch on each BMS first before
switch on the MBMS. After the battery
system finish self-test (require ~2mins),
switch on the inverter.
3. Change the relay or BMS.
4.If problem remain, contact Pylontech
service engineer.
1.Change PMU
2.If problem remain, contact Pylontech
service engineer.
1.Restart
2.If observed a module LED is off, try to
bypass the module on both comm. and
power side and see whether rest
modules’ LED could be on and green. If
so, then please change the BMU of the
bypassed module. If not, further bypass
the next LED off module and repeat the
process.
3. If problem remain, contact Pylontech
service engineer.
1. Restart
2. Change the current measurement
board
3. Change the CMU or BMS.
4.If problem remain, contact Pylontech
service engineer.
1. Restart
2. Swap out the RED LED module
3. Use multimeter to measure the
battery module power terminal voltage,
if is the same as the BMS reading value,
then it’s a true cell damage. Otherwise
please swap the BMU of the module.
Input RV Err
（Bit4）
External
D+ D- reversely
connected
Check the external power cables of the
polarity and connection
DC OV ERR input
over voltage
error
（Bit3）
External
D+ D- voltage extremely
higher than battery
system voltage
Check external inverter's voltage
whether match with the battery system
or not.
Internal Comm.
ERR
（Bit2）
Comm. and
hardware
Communication
offline between
module and BMS
Failure Definition SolutionPossible ReasonFailure Type
1. Check the connectivity and reliability
of the comm. cable between BMS and
battery modules.
2. Restart
3.If problem remain, contact Pylontech
service engineer.
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