The inverter is designed in accordance with the most important international grid-tied
standards and safety and electromagnetic compatibility requirements. Before delivering to
the customer, the inverter has been subjected to several tests to ensure its optimal operation
and reliability.
In case of failure, the LCD screen will display an alarm message. In this case, the inverter
may stop feeding into the grid. The failure descriptions and their corresponding alarm
messages are listed in Table 8.1:
8. Trouble Shooting
Alarm Message
OV-G-V01/02/03/04
OV-G-F01/02
UN-G-F01/02
Reverse-GRID
NO-GR ID
OV-DC01/02/03/04
OV-BU S
UN-BU S01/02
GRI D-INTF01/02
Failure description
Over grid voltage
Under grid voltage
Over grid frequency
Under grid frequency
Wrong AC polarity
No grid voltage
Over D C voltage
Over D C bus voltage
Under DC bus voltage
Grid interference
Solution
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.Check connections and grid switch.
2.Check the grid voltage inside inverter
terminal.
1.Reduce the module number in series
1.Restart inverter
2.Change power board
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 L CD
No power
LCD show initializing
all the time
can not start-up
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.Use user define function to adjust the
protection limit if it’s allowed by
electrical company.
1.Check inverter inductor connection
2.Check driver connection
UN-G-V01/02
DC-IN TF
DC input overcurrent
1.Restart inverter
2.Identify and remove the string to the fault MPPT
2.Change power board
IGF OL-F
Grid current tracking fail
OV-G-I
Over grid current
OV-DC A-I
IGB T-OV-I Over I GBT current
1.Restart inverter or contact installer.
IG-AD
Grid current sampling fail
1. Check the polarity of AC connector.
Reverse-DC
Reverse DC polarity 1. Check the polarity of DC connector.
OV-TE M
Over Temperature
1.Check inverter surrounding ventilation.
2.Check if there’s sunshine direct on
inverter in hot weather.
.50.
.51.
8. Trouble Shooting
Screen OFF
with DC applied
Inverter internally damaged
1.Do not turn off the DC switches as it will
damage the inverter.
2.Please wait for the solar irradiance reduces
and confirm the string current is less than
0.5A with a clip-on ammeter and then turn
off the DC switches.
3.Please note that any damages due to wrong
operations are not covered in the device
warranty.
DCinj-FAULT
High DC injection current
1.Check AC and DC connection
2.Check inverter inside cable connection.
1.Restart inverter or contact installer.
1.Restart inverter or contact installer.
Alarm Message
Failure description
Solution
ILeak-PRO
01/02/03/04
Leakage current protection
RelayChk-FAIL
Relay check fail
INI-FAULT
Initialization system fault
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.
1.Restart inverter or contact installer.
12Power-FAULT
12V power supply fault
DSP-B-FAULT
Comm. failure between main
and slave DSP
PV ISO-P RO
01/02
PV isolation protection
1.Restart the inverter and meter.
2.If it is still not resolved, contact the
factory's customer service.
Fail Safe Meter Communication Fail
1.When this alarm occurs with the G100
switch on, please check and repair the CT
wiring first and then reset the alarm manually
by using the " Advanced Settings ->Internal
EPM Set-> G100Set->Clear Fault " setting in
the LCD/APP or clear the alarm remotely;
when this alarm occurs with the G100 off,
please check and repair the CT wiring.
CT Fault
The alarm occurs when the
CT connected to the inverter
or the CT connected to the
smart meter loses connection.
1. Res tar t the i nve rte r
2. If it i s sti ll no t res olv e d, c o nt a ct t h e fa c to r y's
cu sto mer s erv ice .
AFCI-Check AFCI-Check Protection
1.Check for arc in the inverter PV side
connection and fix it.
2.Restart the inverter.
3.If it is still not resolved, contact the factory's
customer service.
ARC-FAULT
Arc fault because of the
PV side insulation damage
1.Please check if your DRM control device/
logic interface or its wiring is normal.
If there is actually no DRM control device/
logic interface connected, please disable
the DRM function in inverter settings.
DRM LINK_
FAIL
DRM function can not
work normally
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