EG4 FLEXBOSS21 - Page 64

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Para master loss No Master in the parallel system
1.
If a Master has been configured in the
system, the fault will automatically be
removed after the Master works.
2. If a Master has not been configured
and there are only Slaves in the
system, set the Master first.
Note: For a single-unit system, the role of
the inverter should be set as “1 Phase
Master.”
Para rating Diff
Rated power of parallel inverters are
inconsistent
Confirm that the rated power of all
inverters is the same.
Para Phase set error Incorrect setting of phase in parallel
Confirm the wiring for the parallel system
is correct. Once verified, connect each
inverter to the grid. The system will
automatically detect the phase sequence,
and the fault automatically resolves after
the phase sequence is detected. If the
fault persists, contact the supplier.
Para sync loss Parallel inverter fault
Restart the inverter. If the fault persists,
contact the supplier.
Alarm Meaning Troubleshooting
Bat com failure Inverter fails to communicate with battery
Check if the communication cable pinout
is correct, and if the correct battery brand
has been chosen on the inverter’s LCD. If
all is correct but this alarm persists,
contact the supplier.
AFCI com failure
Inverter fails to communicate with AFCI
module
Restart inverter. If the error persists,
contact the supplier.
AFCI high PV arc fault is detected
Check each PV string for correct open-
circuit voltage and short-circuit current. If
the PV strings are in good condition, clear
the alarm on the inverter LCD.
Meter com failure
Inverter fails to communicate with the
meter
Check if the communication cable is
connected correctly and in good working
condition. Restart inverter. If the alarm
persists, contact the supplier.
Bat Fault Battery cannot charge or discharge
1.
Check the battery communication
cable for correct pinout on both
inverter and battery end.
2. Check if an incorrect battery brand
has been chosen.
3. Check if there is a fault on the
battery's indicator. If there is a fault,
contact the battery supplier.
Fwm mismatch
Firmware version mismatch between the
microprocessors
Attempt firmware update again following
the steps in Section 13; if the fault
persists, contact supplier.
Fan stuck
Cooling fan(s) are stuck
Contact supplier.
Trip by GFCI high
Inverter detected leakage current on AC
side
1.
Check if there is ground fault on grid
and load side.
2. Restart inverter. If the alarm persists,
contact the supplier.