Maintenance; Trouble Shooting; Before Start Up; During Operation - Pylontech PowerCube-H1-V2 Operation Manual

5. Maintenance

Danger: The PowerCube-H1/H2-V2 is a high voltage DC system, operated by qualified and
authorized person only.
Danger: Before check the failure, must check all the cables connection and the BESS system
can turn on normally or not.

5.1. Trouble Shooting

5.1.1. Before start up

Failure Mode
Battery system
DO NOT start up
until correct wiring
connection and
start up procedure

5.1.2. During operation

The 'Failure Definition' and 'Failure Mode' column is reference from Pylontech Modbus protocol Appen-
dix IV Error code 1 bit to present.
Failure Type Failure Definition
voltage sensor
Hardware
error（Bit0）
temperature
Hardware
sensor error
Possible Reason
Power cable issue
Internal cable issue
PMU issue
Other error
Possible Reason
1.Sensor cable issue
2.Sensor connection
issue
3.BMU issue
1.Sensor cable issue
2.Sensor connection
issue
（Bit1）
1. Check the wiring connection and connectivity
of the power cables.
2. Open BMS case, check the connectivity and
reliability of the internal power supply cable.
3. Open BMS case, use multimeter check PMU
12Vdc output and CMU LEDs. If neither is on,
please swap the PMU.
4. If problem remain, contact Pylontech service
engineer.
1.Change the RED LED module's
BMU
2.Check the voltage sensor cable
connect between BMU and battery
pack of the connectivity
3. Change the RED LED module.
4.If problem remain, contact
Pylontech service engineer.
1.Change the RED LED module's
BMU
2. Check the temp. sensor cable
connect between BMU and battery
pack of the connectivity
3. Change the RED LED module.
4.If problem remain, contact
Pylontech service engineer.
34 / 42
Solution
Solution