OV-G-V01/02/03/04
OV-G-F01/02
OV-DC01/02/03/04
Over grid voltage
Over grid frequency
Over DC voltage
1. Resistant of AC cable is too high.
Change bigger size grid cable.
2. Adjust the protection limit if it’s
allowed by electrical company.
1. Reduce the module number in series.
OV-G-I
Over grid current
Alarm Message
Failure description
Solution
1. Restart inverter.
2. Change power board.
1. Use user define function to adjust the
protection limit if it’s allowed by
electrical company.
DC input overcurrent
AC side transient overcurrent
LLC hardware overcurrent
1. Restart inverter.
2. Identify and remove the string to the fault MPPT
.
3. Change power board.
1. Restart inverter.
.
2. Return-factory repair
OV-DCA-I
OV-IgTr
OV-ILLC
OV-TEM
OV-Vbatt1
OV-Vbatt-H
Over-Load
OV-VBackup
Over Temperature
The detection of battery
overvoltage
Battery overvoltage
hardware fault
Backup overload fault
Backup overvoltage fault
1. Check inverter surrounding ventilation.
2. Check if there’s sunshine direct on
inverter in hot weather.
1. Check the protect point for over voltage
sets correctly or not.
2. Restart inverter.
1. Check the circuit whether the battery
circuit jumps.
2. Restart inverter.
1. Check the load of Backup port is over
rating output power or not.
2. Reduce the load of Backup port,
then restart inverter.
PV ISO-PRO01/02
PV isolation protection
1. Remove all DC input, reconnect and
restart inverter one by one.
2. Identify which string cause the fault and
check the isolation of the string.
RelayChk-FAIL
Relay check fail
1. Restart inverter or contact installer.
Alarm Message
G-IMP
NO-GRID
OV-BUS
GRID-INTF01/02
INI-FAULT
Failure description
High grid impedance
No grid voltage
Over DC bus voltage
Grid interference
Initialization system fault
Solution
1. Check connections and grid switch.
2. Check the grid voltage inside inverter
terminal.
1. Check PV input connections.
2. Check DC input voltage
(single phase >120V, three phase >350V).
3. Check if PV+/
-
is reversed.
Inverter no power
on LCD
No power
LCD show initializing
all the time
NO-Battery
Can not start-up
Unconnected battery
1. Check if the connector on main
board or
power board are fixed.
2. Check if the DSP connector to
power board
are fixed.
1. Check the wire of battery power is
connected correctly or not.
2. Check the output voltage of battery
is correctly or not.
1. Restart inverter or contact installer.
DC-INTF
IGFOL-F
Grid current tracking fail
IG-AD
Grid current sampling fail
DSP-B-FAULT
Comm. failure between main
and slave DSP
ILeak-PRO
01/02/03/04
DCinj-FAULT
leakage current protection
High DC injection current
AFCI Check FAULT
AFCI module self check fault
1. Check AC and DC connection.
2. Check inverter inside cable connection.
1. Restart inverter or contact installer.
1. Restart inverter or contact installer.
ARC-FAULT
ARC detected in DC circuit
1. Check if there’s arc in PV connection
and restart inverter.
DC input overcurrent
1. Restart inverter.
2. Identify and remove the string to the fault MPPT
.
3. Change power board.
1. Use user define function to adjust the
protection limit if it’s allowed by
electrical company.
1. Restart inverter or contact installer.
1. Restart inverter or contact installer.
1. Check inverter inductor connection.
2. Check driver connection.
1. Restart inverter.
2. Change power board.
IGBT-OV-I
Over IGBT current
8. Troubleshooting
8. Troubleshooting
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