Troubleshooting
116
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Error Codes and Messages
PCS Error Codes
y
Do not leave the ESS in a faulty state for a long time, as the remaining battery capacity may be
decreased during that period.
y
If the BMS generates fault information and disconnects the power after starting PCS, it means
that the battery has a problem. Check the battery SoC, voltage, and fault information and turn off
the power of the ESS until service is performed.
y
If the battery SoC is low, the battery may be charged from the grid by using the self protection
function (Emergency charging). This function is to prevent the shutdown of the ESS, battery deep
discharge, and battery damage. Emergency charging is not an ESS fault, but a normal procedure.
Code
Description
Solution
P105
BAT 1 Disconnect
Contact service center
P110
BAT 1 MisWiring
Contact service center
P120
Grid MisWiring
Contact service center
P130
BAT Relay Error
Contact service center
P131
Grid Relay Error
Contact service center
P140
Slave MCU Comm.
Contact service center
P141
PMS Comm. Error
Contact service center
P142
BAT Comm. Error
Contact service center
P150
Backup SoftSrart
Contact service center
P151
Backup Fail
Reboot the system
P152
Backup Low SOC
Automatically restart after releasing fault
P203
Grid OV
Automatically restart after grid voltage is normal
P213
Grid UV
Automatically restart after grid voltage is normal
P220
Grid OF
Automatically restart after grid frequency is normal
P221
Grid UF
Automatically restart after grid frequency is normal
P230
L1 DC OffsetCurr
Automatically restart after releasing fault
P240
Anti-Islanding
Automatically restart after releasing fault
P300
BAT 1 OV
Automatically restart after battery voltage is normal
P310
BAT 1 UV
Automatically restart after battery voltage is normal
P320
BAT 1 OC
Automatically restart after battery current is normal
P330
BAT 1 OC HW
Automatically restart after battery current is normal
P350
BAT 1 Low SOC
Automatically restart after battery SOC is normal
P351
BAT1 State Error
Automatically restart after battery state is normal
Troubleshooting