The solar inverter is the central core of any photovoltaic system. When an error code or grid disconnection occurs, power generation halts immediately. Find exact causes and repair protocols to secure and restore your PV inverters.
We couldn't find documented codes for the selected brand in Solar Inverters.
Applies to: Fronius Primo / Symo / Gen24
Insufficient DC input voltage on the inverter MPPT trackers. The unit remains in standby because solar irradiance is inadequate to reach the required DC startup threshold (Udc min).
Applies to: SMA Sunny Boy / Sunny Tripower
Galvanic insulation fault on the DC photovoltaic array. The inverter detects a DC leakage current to ground and locks out its coupling contactors for life safety.
Applies to: Huawei SUN2000 (2KTL to 100KTL)
Insulation resistance between the DC photovoltaic array and ground has dropped below the safety threshold (Low Insulation Resistance to earth).
Applies to: SolarEdge HD-Wave SE3000H–SE10000H
The inverter isolation monitoring interrupter (Riso) detected DC leakage current to ground exceeding safety thresholds, preventing grid export to stop electric shock risks.
Applies to: Growatt MIN 2500–6000TL-X / MOD Series
Insulation resistance between the PV DC circuit and Earth Ground is below the safety limit (50 kΩ), indicating a ground fault in the solar array or rooftop wiring.
Applies to: Enphase IQ Envoy / IQ Gateway / IQ8
The IQ Gateway has lost communication with one or more rooftop microinverters over the electrical AC power lines (Power Line Communication failure).
Prior to performing any diagnostic testing or taking electrical measurements on residential or commercial equipment, always lock out / tag out (LOTO) power sources and shut off fuel or water supplies. Wear rated personal protective equipment (insulated gloves, eye protection) and use a calibrated CAT III/CAT IV digital multimeter.
If fault symptoms persist after executing our pinout checks and component resistance tests, consult a factory-certified technician or licensed HVAC/appliance specialist.