Troubleshooting
63
Tr
oubleshoo
ting
4
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
Description
Solution
P400
AC MisWiring Fault
Incorrect wiring grid connection
has detected
Contact service center
P401
Meter Comm Fault
Communication error with the
energy meter
Contact service center
P402
BMS Fault
The BMS fault message from
battery.
Contact service center
P403
BMS Comm Fault
Communication error with the
connected battery for over 10
seconds.
Contact service center
P404
PMS Comm Fault
Communication error on PCS
system
Contact service center
[FBG
SDSP Comm Fault
Communication error with the
uwthjxxnslzsnyktwt{jwCG
seconds
Contact service center
P406
SDSP Fault
[GFB"^O^[Ojyjhynts-thhzwxE
times
Contact service center
P407
Fan Fault
[GFC"QfsOjyjhynts-thhzwxE
times
Contact service center
P408
Grid Relay Fault
Fault occurs 3 times in the same
relay
Contact service center
P409
PV Over Voltage Fault
Voltage level of the PV is higher
than the limitation and the state
is maintained for more than 10
minutes
Contact service center
