Fault/Alarm Codes for All Inverter Products

NOTE: For any fault codes not listed below, request information from James Wang (shijie.wang@ginlong.com).


1. Alarm Codes and issues for Solis 1P(1-6)K-4G-US and Solis-(6-10)K-4G-US  Single Phase


No Information
(Blank Screen)
• Input voltage low/missing
• Polarity reversed
• Main board damaged
Test – DC switch OFF
• Check PV connections
• Check polarity
• Check voltage >120V Single, >350V three
Test – DC Switch ON
• Check voltage >120V Single, >350V three
• If DC voltage is “0” replace inverter
If voltages are all normal but inverter won't turn on - RMA
Initializing
(Inverter stuck
in this mode)
• Inverter is waiting for
driving signal
Test – DC switch OFF
• Check PV connections
• Check polarity
• Check voltage >120V Single, >350V three
Test – DC Switch ON
• Check voltage >120V Single, >350V three
• A cable may have been damaged or loosened
in shipping replace inverter
OV-G-V: Over
Grid Voltage
• Inverter detects grid
voltage as too high
Test – DC switch OFF
• Check AC at the inverter
• If AC measures high, adjust upper limit with
permission from utility
Test – DC Switch ON, full power
• Check AC at inverter test points
• Compare with LCD
• If AC measures high, cables between inverter
and interconnect are too small
• Check ampacity and voltage drop calculations
UN-G-V: Under
Grid Voltage
• Inverter detects grid
voltage as too low
Test – DC switch OFF
• Check AC at the inverter test points
• If AC measures low, adjust lower limit with
permission from utility
• Check LCD voltage reading, may be a bad
measurement circuit
Test – DC Switch ON
• Check grid standard
• Replace inverter
OV-G-F: Over
Grid Frequency
• Inverter detects grid
Frequency as too high
Test – DC switch OFF
• Check frequency at the inverter test points
• If Frequency measures high, adjust upper
limit with permission from utility
• Check LCD reading, may be a bad
measurement circuit
Test – DC Switch ON
• Check grid standard
• Replace inverter
NO-GRID• Inverter does not
detect the grid
Test – DC switch OFF
• Check AC at the inverter test points
• L-L, L-GND
• Do NOT tell me 240VAC
• Check LCD reading, may be a bad
measurement circuit
Test – DC Switch ON
• Check grid standard
• Replace inverter
OV-DC: DC
voltage is too
high
• Inverter detects High DCVTest – DC switch OFF
• Check DC at the inverter test points
• If DCV is high, too many panels in the string
Test – DC Switch ON
• Check LCD reading, may be a bad
measurement circuit
• Replace inverter
OV-BUS: DC
BUS voltage is
too high
• Inverter detects High
DCV on internal bus
Test
• Measure DC and AC voltages
• Compare with LCD
• Replace inverter
• Internal damage
• Wire came loose during shipping
UN-BUS: DC
BUS voltage is
too low
• Inverter detects low DCV

on internal bus

Test
• Measure DC and AC voltages
• Compare with LCD
• Replace inverter
• Internal damage
• Wire came loose during shipping
GRID-INTF:
Grid unstable
• Inverter detects grid
instability, internal fault
current high
Test – With DC Switch OFF
• Measure AC voltage
• Test AC line for THD
• Test – With DC Switch ON
Test AC line for THD
• Multiple inverters/turn one off
• Impedance matching adjustment or box
• Internal damage
• Wire came loose in shipping  
INI-FAULT:
Initialization
Protection    
• Master and Slave DSP
have different values
Reset Inverter
• DC switch OFF
• Wait until all lights/LCD turn off
• DC switch ON
• Replace inverter
OV-TEM:
Temperature
Protection
• Inverter detects high
ambient temperature >60C
Inspect installation
• Check heatsink for obstructions/ventilation
• Is inverter in direct sunshine
• Measure ambient temperature near inverter
• If temp is in range replace inverter
PV ISO-PRO
01/02:
Ground
Protection
• Inverter detects low DC
insulation resistance
Inspect installation
• Reset inverter
• Note weather conditions when alarm occurs
• Measure insulation resistance
• If normal, measure in SAME weather as alarm
• Physically check cables
• Replace inverter
AFCI Check
FAULT
• AFCI module self
check fault
Reset Inverter
• DC switch OFF
• Wait until all lights/ LCD turn off
• DC switch ON
• Replace inverter
ARC-FAULT• Inverter detects arc
in DC circuit
Inspect installation
• Physically check cables
• Inspect panel junction boxes
• Inspect cable connections
• Reset inverter
• Replace inverter
IG-AD

• Grid current sampling fault

• Fault caused by internal component failure --> Automatic RMA.

 

 2. Alarm Codes and Issues for Solis-(1-5)K-2G-US                                                                                                                  Single Phase


OV-G-VOVER GRID VOLTAGE
UN-G-VUNDER GRID VOLTAGE
OV-G-FOVER GRID FREQUENCY
UN-G-FUNDER GRID FREQUENCY
G-IMPHIGH GRID IMPEDANCE
NO-GRIDNO GRID VOLTAGE
OV-DCOVER DC VOLTAGE
OV-BUSOVER DC BUS VOLTAGE
UN-BUSUNDER DC BUS VOLTAGE
GRID-INTFGRID INTERFERENCE
INI-FAULTINITIALIZATION SYSTEM FAULT
OV-TEMOVER TEMPERATURE
GROUND-FAULTGROUND FAULT
ILEAK-FAULTHIGH GRID LEAKAGE CURRENT
RELAY-FAULTRELAY CHECK FAULT
DCINJ-FAULTHigh DC injection current
AFCI CHECK FAULTAFCI Module self-check fault
ARC-FAULTArc detected in DC current
AC/DC unresponsive DC input shorted out
RMA

 

3. Alarm Codes and Issues for Solis Energy Storage (Hybrid) 5-10 kW  Single Phase 


 

Alarm Code or IssueFailure DescriptionSolution
OV-G-VGrid Overvoltage1. Check if the grid is correctly connected
2. Check if the AC voltage is normal on the LCD
3. Match displayed voltage with voltage measured at the AC terminals in the inverter
4. If voltages do not match - RMA
UN-G-VGrid Undervoltage1. Check if the grid is correctly connected
2. Check if the AC voltage is normal
OV-G-FGrid Overfrequency1. Check if the grid is correctly connected
2. Check if the AC voltage is normal
UN-G-FGrid Underfrequency1. Check if the grid is correctly connected
2. Check if the AC voltage is normal
NO-GridNo Grid1. Check if the grid is correctly connected
2. Check if the AC voltage is normal
OV-BUSDC Bus overvoltageRestart the inverter
UN-BUSDC Bus voltage sampling ErrorRestart the inverter
DC-INTF.Battery OvercurrentRestart the inverter
IGFOL-FGrid Current Tracking ErrorRestart the inverter
OV-G-IGrid OvercurrentRestart the inverter
AC Transient over currentAC Transient OvercurrentCheck if the backup port is shorted, restart the inverter
DCInj-FAULTOver DC injectionRestart the inverter
LimByVgLimited by grid voltageIf Rule 21 is unnecessary, then set working mode to "NULL" but if Rule 21 is required, know that this code is designed to protect the inverter and is normal but if the code is given for long periods of time then it could mean there is an issue with the inverter or grid. 
IGBT-OV-IIGBT OvercurrentRestart the inverter
OV-TEMInternal Over TemperatureCheck if the inverter installation meets the requirements listed in the manual, restart the inverter
RelayChk-FAILRelay FaultRestart the inverter
GRID-INTF02Grid Interference 02Restart the inverter
IG-ADGrid Current Sampling ErrorRestart the inverter
OV-IgTrGrid Transient OvercurrentRestart the inverter
OV-Vbatt-HBattery Hardware OvercurrentCheck if the battery is correctly connected or the battery contactor is disconnected, restart the battery, restart the inverter
OV-ILLCLLC Hardware OvercurrentRestart the inverter
OV-VbattBattery OvervoltageCheck if the battery overvoltage setting is reasonable, if the battery reaches its end of life
UN-VbattBattery UndervoltageCheck if the battery undervoltage setting is reasonable, if the battery reaches its end of life
DSP-B-FAULTSlave DSP Check ErrorRestart the inverter
NO-BatteryBattery Not ConnectedCheck if the battery is correctly connected or the battery contactor is disconnected, Restart the battery
OV-VbackupInverting OvervoltageRestart the inverter
Over-LoadBackup OverloadCheck if the backup port is shorted or the load is larger than the limitation
Fail SafeCT Cable FailCheck if CT is correctly installed or the cables are broken/loosen 
MET_Comm_FAILMeter COM FailCheck if the CT/Meter setting is correct or the cables are broken/loosen
CAN_Comm_FAILBattery CAN FailCheck if the CAN cable is correctly connected or the cables are broken/loosen
DSP_Comm_FAILDSP COM FailRestart the inverter
Alarm-BMSBattery BMS AlarmRetart the battery, if fault still exists, please contact battery manufacturer or installer 
BatName-FAILWrong Battery ModelMake sure the actual battery model matches the selection on inverter LCD
LG-DDC-OVLG Battery overvoltage Turn both battery breaker off and then on again.
LG-Comm-FAILLG Battery Com FailCheck the RS485 cable of LG battery. Ensure it is correctly connected without broken insulation
LG-BMS-Fault
Restart the battery. If the fault still exists, contact the battery manufacturer or installer.


3. Alarm Codes and Issues for Solis-(25-40)K-US, (50-66)K-US, (75-100)K-US, 125K-US, and (185-255)K-US Three Phase Inverters





Alarm MessageFailure DescriptionSolution
No PowerInverter No Power on LCD1. Check PV input connections
2. Check DC input voltage
(single phase >120V, three phase >350V)
3. Check if PV+/- is reversed
4. If everything is normal, including voltages - RMA
LCD show initializing
all the time
can not start-up1. Check if the connector on main
board or power board are fixed.
2. Check if the DSP connector to
power board are fixed.
LCD Blank
RMA
OV-G-VOver grid voltage1. Resistant of AC cable is too high.
Change bigger size grid cable
2. Adjust the protection limit if it’s
allowed by electrical company
UN-G-VUnder grid voltage1. Use user define function to adjust the
protection limit if it’s allowed by
electrical company.
OV-G-FOver grid frequency1. Use user define function to adjust the
protection limit if it’s allowed by
electrical company.
UN-G-FUnder grid frequency1. Use user define function to adjust the
protection limit if it’s allowed by
electrical company.
G-IMPHigh grid impedance1. Use user define function to adjust the
protection limit if it’s allowed by
electrical company.
No-GridNo grid voltage1. Check connections and grid switch.
2. Check the grid voltage inside inverter
terminal.
OV-DCOver DC voltage1. Reduce the module number in series
OV-BUSOver DC bus voltage1. Check inverter inductor connection
2. Check driver connection
UN-BUSUnder DC bus voltage1. Check inverter inductor connection
2. Check driver connection
3. If an MPPT has failed - RMA
GRID-INTFGrid interference1. Restart inverter
2. Change power board
OV-TEMOver Temperature1. Check inverter surrounding ventilation.
2. Check if there’s sunshine direct on
inverter in hot weather.
INI-FaultInitialization system fault1. Restart inverter or contact installer.
Ground-FaultGround fault1. Measure the insulation resistance and
locate and check isolation of PV cable.
2. Change the main board if the
resistance are higher than 1MΩ
ILeak-FaultHigh Grid leakage current1. Check AC and DC connection
2. Check inverter inside cable connection.
Relay-FaultRelay check fault1. Restart inverter or contact installer.
DCinj-FaultHigh DC injection current1. Restart inverter or contact installer.
AFCI Check FaultAFCI module self check fault1. Restart inverter or contact installer.
Arc FaultARC detected in DC circuit1. Check if there’s arc in PV connection
and restart inverter.
2. If the arc fault is false - RMA
LimbyTemp    Temp Below 17C.  Inv Could limit power to 50%    1. Wait until internal temperature rises above 17C
DC-INTF

Stuck in Soft Run Mode
RMA
Display voltages and meter voltages don't match 
RMA


T
Travis is the author of this solution article.

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