This article serves as an overview of all Solis alarm codes. Please use it to quickly find the article that you need depending on the alarm code you are experiencing.
For Solis RHI-1P(5-10)K-HVES-5G-US (hybrid energy storage) inverter alarms, please scroll down and use the second chart.
Click or tap the Alarm Code name to view the troubleshooting article specific to that alarm.
| Alarm Code or Issue | Brief Explanation of Alarm | Basic Troubleshooting Steps |
| 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 |
| No Information - Blank Screen | • DC input voltage low/missing • DC string polarity reversed • Internal DC short - RMA | Test – DC switch OFF • Check string polarity to make sure it is not reversed • Check DC string voltages >120V Single, >350V three Test – DC Switch ON • Check DC string voltages again >120V Single, >350V three • If DC voltage is “0” replace inverter - internal DC short - RMA If DC voltages are all normal but inverter won't turn on - RMA |
| Initializing: Inverter stuck in this mode | Inverter is waiting for the driving signal from the DSP | RMA - the inverter is not receiving a signal from the DSP board or it has a faulty internal power board |
| OV-G-V: Over-Grid-Voltage Alarm | Inverter detects the grid voltage as too high - has multiple iterations: V01, V02, V03, V04, and V05 | 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 Alarm | Inverter detects the 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 Alarm | Inverter detects the 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 |
| UN-G-F: Under-Grid-Frequency Alarm | Inverter detects the grid | Test – DC switch OFF • Check frequency at the inverter test points • If frequency measures low, 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 Alarm | Inverter does not detect any grid voltage | Potential Resolution: Turn the DC switch off and leave it off until the screen goes blank. Then turn on the AC switch followed by the DC switch. Wait to make sure the system begins generating after five minutes. If this does not work, proceed with the steps below. Test – DC switch OFF • Measure the AC voltage at the AC grid input terminals • L1-L2, L1-L3, L2-L3, L1-GND, L2-GND, L3-GND • Check the AC voltages found in the Information menu, if they do not match your multimeter - RMA (send a photo of this) |
| OV-DC: DC voltage is too high | • Inverter detects High DCV | Test – 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 DC voltage on the internal bus | Test • Measure DC and AC voltages with a multimeter • Compare with voltages found in the Information menu • If multimeter and display voltages do not match - RMA • If the values do match, ensure that they do not exceed the inverter specifications. If they do, reconfigure your PV strings to have lower voltage so that it is within spec |
| UN-BUS: DC bus voltage is too low | Inverter detects low DC voltage on the internal bus | Test • Measure DC and AC voltages with a multimeter • Compare with voltages found in the Information menu • If multimeter and display voltages do not match - RMA • If the values do match, ensure that they do not exceed the inverter specifications. If they do, reconfigure your PV strings to have lower voltage so that it is within spec |
| ILeak-PRO 01/02/03/04: Current leakage to ground | Current leakage on the AC or the DC circuit | Consult the article because this one is more complex |
| Fan-Fail | One or more of the inverter fans is not operating | Test - DC switch ON
|
| GRID-INTF: unstable grid or faulty power board | 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 |
| DC-INTF: DC Interference Fault | DC interference - faulty internal component | Test – With DC Switch OFF
|
| G-IMP | High grid impedance | Use the User-Define grid standard so you can adjust the protection limit if it is allowed by the utility |
| 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-fault detected on the DC side | Inverter detects low DC insulation resistance - ground fault on one of the PV strings | 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 |
| ARC-Fault: An arc fault has been detected | Inverter detects an arc in the DC circuit | Inspect installation • Physically check cables • Inspect panel junction boxes • Inspect cable connections • Reset inverter • Replace inverter |
| IG-AD: Grid current sampling failure | Internal component failure | Fault caused by internal component failure - RMA |
| LimByVg: Power curtailed due to grid voltage | Power is being curtailed because of the grid voltage being too high or too low | • Inspect panel junction boxes • Inspect cable connections • Reset inverter • Replace inverter |
| LimbyTemp | Temp Below 17C. Inv Could limit power to 50% | 1. Wait until internal temperature rises above 17C |
| Relay-Fault | Relay check fault | Restart inverter or contact installer. |
| DCinj-Fault | High DC injection current | Restart inverter or contact installer. |
| Stuck in Soft Run Mode | RMA | |
| IGFOL-F | Grid Current Tracking Error | Restart the inverter - if the alarm persists, RMA |
For the RHI-1P(5-10)K-HVES-5G-US series, please use the chart below for any alarms not listed above - these alarms are unique to the hybrid inverter series and will not be seen on any other Solis inverter models.
***Click or tap the Alarm Code name to see the on how to troubleshoot that specific alarm***
| Alarm Codes and Issues for Solis RHI-1P(5-10)K-HVES-5G-US | ||
| Alarm Code or Issue | Failure Description | Solution |
| AC Overcurrent | High current demand from the backup loads or a faulty outlet | There is too much draw on the backup loads panel > 25A reduce the current draw or install a 25A supply breaker so there is an OCPD in place - check to make sure no outlets are tripping |
| AC Transient over current | AC Transient Overcurrent | Check if the backup port is shorted, restart the inverter |
| LmtByPLmt | Output power reduced due to Export Power configuration | Output power is being limited because the system is currently set up for minimum export. Please see Export Power Set on how to change this if you want the system to be exporting power. |
| LimByVg | Limited by grid voltage | If 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-I | IGBT Overcurrent | Restart the inverter |
| OV-IgTr | Grid Transient Overcurrent | Restart the inverter |
| OV-Vbatt-H | Battery Hardware Overcurrent | Check if the battery is correctly connected or the battery contactor is disconnected, restart the battery, restart the inverter |
| OV-ILLC | LLC Hardware Overcurrent | Restart the inverter |
| OV-Vbatt | Battery Overvoltage | Check if the battery overvoltage setting is reasonable, if the battery reaches its end of life |
| UN-Vbatt | Battery Undervoltage | Check if the battery undervoltage setting is reasonable, if the battery reaches its end of life |
| DSP-B-FAULT | Slave DSP Check Error | Restart the inverter |
| NO-Battery | Battery Not Connected | Check if the battery is correctly connected or the battery contactor is disconnected, Restart the battery |
| OV-Vbackup | Inverting Overvoltage | Restart the inverter |
| Over-Load | Backup Overload | Check if the backup port is shorted or the load is larger than the limitation |
| FailSafe | Inverter and meter communication failure -FailSafe is enabled | Troubleshoot communication between the inverter and meter. See the article FailSafe on how to disable this setting if you do not want it enabled. |
| MET_Comm-FAIL | Inverter and external (Acrel) meter are not communicating | Make sure the RS485 between the inverter and meter is installed properly. If no meter is installed, change to "No Meter" |
| CAN_Comm_FAIL | Battery CAN Fail | Check if the CAN cable is correctly connected or the cables are broken/loosen |
| DSP_Comm_FAIL | DSP COM Fail | Restart the inverter |
| Alarm-BMS | Battery BMS Alarm | Retart the battery, if fault still exists, please contact battery manufacturer or installer |
| BAT_Comm-FAIL | No communication between the inverter and battery OR the wrong battery is selected | Check the RS485 or CAN wire between the inverter and battery. Verify that the correct battery has been selected in the Battery Select submenu of Advanced Settings |
| LG-DDC-OV | LG Battery overvoltage | Turn both battery breaker off and then back on again after ten minutes. |
| LG-Comm-FAIL | LG Battery Com Fail | Check the RS485 cable of LG battery. Ensure it is correctly connected without broken insulation |
| LG-BMS-Fault | LG BMS is having it's own fault and the inverter is just relaying the message | Restart the battery. If the fault still exists, contact LG for assistance |