Troubleshooting; Error Codes And Messages; Pcs Error Codes - LG LGE ESS Home 6 Installation Manual

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Troubleshooting

Error Codes and Messages

PCS Error Codes

y Do not leave the ESS in the fault standby state for a long time because battery discharge may occur.
y If battery fault occurs immediately after starting the PCS, it means battery failure. Check the battery SoC
as well as voltage and fault information, and turn off the power of the ESS until service action is taken.
y If the battery SoC is low, the battery may charge from the grid for self-protection. (Emergency Charging)
This function is to prevent the shutdown of the ESS, deep discharge, and failure of the battery. An
Emergency Charge is not an ESS fault.
Code Message
P105 Battery A Disconnect
4
P110 Battery A Miswiring
P131 AC Relay Fault
P132 Fan1 Heavy Fault
P133 Fan2 Heavy Fault
P140 SMCU Comm.
P141 PMS Comm.
P142 BMS Comm.
P150 Backup Soft-Start Fail
P151 Backup Operation Fail
P152 Bat Low SoC
P160 PCS Initial Startup Fail
P203 Grid Overvoltage
P213 Grid Undervoltage
P220 Grid Overfrequency
Description
BMS communication of BAT A is
connected but the power line of BAT A is
not connected
BAT A reverse polarity wiring
The grid relay is not operational
Despite being enabled, the fan does not
operate
Despite being enabled, the fan does not
operate
A communication error with the connected
Slave MCU for over 10 minutes
A communication error with the connected
PMS for over 10 minutes
A communication error with the connected
battery for over 10 minutes
During the soft-start backup operation,
PCS faults occur more than 10 times
Backup operation failed
The SoC of the battery is lower than 10 % Contact service center
The PCS failed the initial startup
The voltage level of the grid is higher than
the limit
The voltage level of the grid is lower than
the lower limit
The frequency level of the grid is higher
than the limit
Solution
Contact service center
Contact service center
Contact service center
Contact service center
Contact service center
Contact service center
Contact service center
Contact service center
Contact service center
Contact service center
Contact service center
Automatically restart after
grid voltage is normal
Automatically restart after
grid voltage is normal
Automatically restart after
grid frequency is normal