Troubleshooting; Troubleshooting Guidelines - LG RESU16H Prime Installation Manual

5 Troubleshooting

Check the LED indicators on the front to determine the state of the battery pack. A faulted state
is triggered when certain conditions like voltage or temperature are beyond design limitations.
The battery pack's BMS periodically reports its operating state to the inverter.
When the battery pack falls outside of prescribed limits, it enters a faulted state. When a fault is
reported, the inverter immediately terminates operation.
Use the monitoring software on the inverter to identify what caused the faulted state. The
possible warning messages are as follows:
Battery Overvoltage
Battery Undervoltage
Battery Over Temperature
Battery Under Temperature
Battery Discharge Overcurrent
Battery Charge Overcurrent
Battery Overcharge Power Limit
Battery Overdischarge Power Limit
BMS Internal Error
External Communication Error
Internal Communication Error
Battery Cell Deviation Voltage
Battery Pack Undervoltage
Battery Urgent Undervoltage
The faulted state is cleared when the battery pack resumes normal operation. If battery pack
is not working correctly and the issue persists, contact LG Energy Solution regional contact
service Point.
NOTE
For serious warnings, if no proper corrective action is taken by the inverter, the battery
pack's circuit breaker will automatically trip to protect itself.
CAUTION
If the battery pack or the inverter indicates FAULT or fails to operate, contact LG Energy
Solution regional contact point.
1. Visually check if the wiring matches the installation manual. (Section
3.3 Cable Connections.)
2. The circuit breaker is ON.
3. The battery LED power indicator is ON.
4. The inverter power is ON.
5.
6. The inverter recognizes the battery.
7. The battery is operational after installation.
7-1. The AC grid is connected.
7-2. The meter is installed.
7-3. Government approval is complete.
8. IF ANY ITEM IN #7 IS CHECKED AS "NO" OR IF THE INVERTER
NEEDS TO BE TURNED OFF, TURN OFF THE CIRCUIT
BREAKER. 3)
1) Contact the inverter manufacturer.
2) Refer to the inverter installation manual or troubleshooting guidelines.
3) Refer to the Installation manual (3.3 Cable Connections) for the location of the battery. and
the Circuit Breaker.
16
Yes
1)
2)
5.1.2

Troubleshooting Guidelines

If the battery LED power indicator is OFF
1.
2.
3. Unplug all the wires and reconnect. Check that the wiring on the battery has been
done correctly. Refer to Section 3.3 Cable Connections.
4. Turn on the circuit breaker.
5. Turn on the inverter.
6.
7. Disconnect the power cable connector.
8. Contact LG Energy Solution regional contact point.
If the LED power indicator is ON, but the battery is not charging or discharging
1.
troubleshooting guide for instructions.
2. Check the inverter's battery settings. Refer to the inverter's troubleshooting guide
for battery setup instructions.
3. If the battery is recognized, inverter setup has been completed successfully.
4. If the issue persists:
4-3. Unplug all wires and reconnect. Check that the wiring on the battery has been done
correctly. Refer to Section 3.3 Cable Connections.
4-4. Turn on the circuit breaker.
5.
circuit breaker
6. Contact LG Energy Solution regional service contact point.
LED Status
If the LED fault indicator is ON
No 1. Check if the inverter recognizes the battery. Refer to the inverter's troubleshooting
guide for battery setup instructions.
2.
company.
2-1. Send the fault ID to LG Energy Solution regional contact point.
2-3. Wait further instruction from LG Energy Solution.
3. If the inverter is not connected to the internet, check the inverter LCD to read the
battery's fault ID. Refer to the inverter's troubleshooting guide for instructions.
3-1. Send the fault ID to LG Energy Solution regional contact point.
3-3. Wait further instruction from LG Energy Solution.
LED Status
Action
Power on
Charging
Discharging
Action
Fault