Troubleshooting; Error Codes And Messages; Pcs Error Codes - LG ESS Home 10 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 of the battery discharge
may occur during the long standby state.
y If the battery fault occurs immediately after starting PCS it means Battery failure. Check the
battery SOC also 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 shutdown of the ESS, deep discharge and failure of the
Battery. An Emergency Charge is not an ESS fault.
Code Message
P400 AC MisWiring Fault
4
P401 Meter Comm Fault
P403 BMS A Comm. Fault
P404 PMS Comm Fault
P405 SDSP Comm Fault
P406 SDSP Fault
P407 Fan Fault
P408 Grid Relay Fault
P411 Battery A MisWiring
Fault
P413 BMS B Comm. Fault
Description
Incorrect wiring grid connection
has detected
Communication error with the
energy meter
Communication error with the
connected battery for over 30
seconds.
Communication error with the
connected PMS for over 60
seconds.
Communication error with the
processing unit for over 60
seconds
P540(SDSP Detection) occurs 3
times
P541, P542 (Fan Detection)
occurs 3 times
Fault occurs 3 times in the same
relay
Battery 1 power line connection is
abnormal
Communication error with the
connected battery for over 30
seconds.
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