The Complete Guide To Sungrow Inverter Error Codes

The mains voltage at your switchboard went above the limit the inverter is allowed to run at, which is common on sunny afternoons when the street is exporting a lot of solar. The inverter switches off to protect itself and reconnects once the voltage settles.

A very short spike in the mains voltage tripped the inverter. It is a grid event, not a fault in the inverter, and it reconnects by itself once the grid is steady.

The mains voltage dropped below the inverter's lower limit, often during a brown-out, a partial outage or heavy load on the street. The inverter waits for the grid to return to normal and then reconnects.

A deeper or very brief drop in mains voltage than code 004. The grid is the cause and the inverter reconnects once the supply is steady.

The mains frequency went above the inverter's limit. This is a grid event and the inverter reconnects once the frequency returns to normal.

The mains frequency dropped below the inverter's limit. This is a grid event and the inverter reconnects once the frequency returns to normal.

The inverter cannot see the mains supply, so it has shut down. Either the power is out in your area, the solar supply main switch or AC breaker has tripped, or an AC connection has failed. It reconnects by itself once it sees the grid again.

The inverter saw something wrong with the mains during its checks before connecting, such as unstable supply, a loose AC cable or live and neutral swapped. It reconnects once the grid reads normally.

The average mains voltage over ten minutes was above the limit set by AS/NZS 4777, which is very common in Australian streets with lots of solar. The inverter reconnects once the average drops, but if it happens most days you lose production.

A higher grid overvoltage trip than code 002. The mains voltage at the inverter rose well above the limit, which can be the street voltage or an undersized or long AC cable adding voltage rise. The inverter reconnects when the voltage drops.

On a three-phase supply, the voltages on the three phases are too far apart for the inverter to run. It is a grid condition and the inverter reconnects when the phases balance.

The surge protection device on the inverter's AC side has worn out or failed, often after a lightning storm or a grid surge. The inverter keeps producing but is no longer protected until the module is replaced. Internal and hardware faults need testing with the right instruments, so we treat them as a call.

The surge protection device on the inverter's solar (DC) side has worn out or failed, often after a lightning storm. The inverter keeps producing but is no longer protected until the module is replaced. Internal and hardware faults need testing with the right instruments, so we treat them as a call.

The mains frequency went above the inverter's upper limit. It is a grid event and the inverter reconnects once the frequency settles.

The mains frequency dropped below the inverter's lower limit. It is a grid event and the inverter reconnects once the frequency settles.

The voltage on the inverter's AC side dropped below its limit. It usually behaves like a grid undervoltage and clears when the supply recovers; Sungrow's current manuals list it in the system fault group, so a repeat with the grid normal needs a check.

The voltage on the inverter's AC side went above its limit. It usually behaves like a grid overvoltage and clears when the voltage settles; Sungrow's current manuals list it in the system fault group, so a repeat with the grid normal needs a check.

The hybrid inverter is in backup mode but can see the mains on a port that should be isolated, which means the backup and grid wiring are connected together somewhere. It is a wiring fault that needs an electrician.

The inverter's surge protection or an internal fuse is showing abnormal, often after a storm or on a hybrid with a loose battery DC cable. Production usually continues, but the protection needs checking. Internal and hardware faults need testing with the right instruments, so we treat them as a call.

The solar string on input 1 is wired with positive and negative swapped. The inverter will not run it, and the connectors must only be unplugged by an electrician once the string current has dropped.

The solar string on input 2 is wired with positive and negative swapped. The inverter will not run it, and the connectors must only be unplugged by an electrician once the string current has dropped.

On a hybrid inverter running the house from the battery, the appliances on the backup circuit are drawing more than the inverter can supply. Turning off heavy appliances lets it recover.

The solar string voltage is higher than the inverter's internal bus can accept, which normally means too many panels in series for this inverter. Sungrow lists it as a system fault.

One solar string (532 is string 1, 533 string 2 and so on) is connected with positive and negative swapped. The inverter will not use that string, and the connectors must only be unplugged by an electrician once the string current has dropped.

One solar string (548 is string 1, 549 string 2 and so on) is producing much less than expected. Shading, dirt, a loose connector, a blown string fuse or a failing panel are the usual causes. The inverter keeps running on the other strings.

The inverter detected a solar string shorted to earth (1600 is string 1, 1601 string 2 and so on). This is a serious safety fault: Sungrow says the DC isolator must not be opened and the faulty string must not be reconnected until an electrician has cleared the fault.

The inverter detected current leaking to earth from the solar wiring, which is a safety trip. Damp weather or poor sunlight can cause it and it may clear when things dry out, but a repeat means the cables or connectors need testing.

The inverter measured too little insulation between the solar wiring and earth before it would start, which is a safety trip. Moisture in a connector or junction box after rain, a damaged cable, or a cracked panel are the usual causes. It may clear on a dry day, but a repeat needs testing.

The circuit that watches for current leaking to earth failed its self-test, so the inverter cannot be sure its safety protection works and stays off. Sungrow lists it as a system fault that needs a service call if a restart does not clear it.

The inverter's backup processor detected current leaking to earth from the solar wiring. Treat it the same as code 012: a safety trip that needs the strings tested if it repeats.

The circuit that watches for electrical arcing in the solar wiring failed its own self-test, so the inverter cannot rely on that safety function. Sungrow lists it as a system fault that needs service if a restart does not clear it.

The inverter detected electrical arcing in the solar DC wiring, which is a fire risk, and has shut down. A loose or corroded connector, a damaged cable or a failing panel junction box is the usual cause. It must not simply be cleared and restarted until the wiring has been inspected.

The inverter's arc fault detection has been turned off in the settings, so it warns you that this safety function is not active. Production continues; the installer can turn it back on. Arc faults are a fire risk, so we treat them as a call.

The inverter cannot see a proper earth connection, so it refuses to run. A loose or missing earth or neutral at the inverter or switchboard, or a problem with the main earth link, is the usual cause. It is a safety fault that needs an electrician.

On hybrid inverters, the solar wiring measured too little insulation to earth, the same safety trip as code 039. Moisture in a connector or isolator after rain or a damaged cable are the usual causes.

The sensor that watches for current leaking to earth failed its self-test, so the inverter will not run without that protection. Sungrow lists it as a system fault.

The inverter's heatsink or power module is too hot, so it has cut back or stopped until it cools. Direct sun on the unit, a blocked vent, a dead fan or a very hot day are the usual causes. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The air around or inside the inverter is hotter than it is rated for, so it has reduced output or stopped until it cools. It restarts by itself once the temperature drops, but a poorly placed inverter will keep doing this all summer. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The inverter is colder than its minimum operating temperature (about minus 25 degrees), so it will not start. It is rare in Australia and the inverter can be restarted once the day warms up.

The inverter's cooling fan is not running properly, either blocked or worn out. The inverter keeps running but will overheat and cut back on hot days until the fan is cleaned or replaced. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

One of the inverter's temperature sensors reads open or short circuit (503 and 504 ambient, 505 and 506 internal). The inverter keeps producing but may cut back wrongly on warm days until the sensor is fixed. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The cooling fan is running slow (512) or has stalled (513). The inverter keeps producing but will overheat and cut back on hot days until the fan is cleaned or replaced. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The current the inverter was pushing into the grid went above its protection limit, usually because of a disturbance on the grid. It starts again on its own once the current drops back. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

A brief surge of output current tripped the inverter. It recovers by itself within seconds, and Sungrow's current manuals treat it as a general system fault if it keeps returning. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

The inverter measured too much DC in the current it sends to the grid. It usually clears itself; if it keeps returning it points to a problem inside the inverter. DC on the AC side is a protection fault, so we treat it as a call.

The voltage on the inverter's internal DC bus went above its limit, usually because the solar string voltage is high on a cold bright morning or the array is oversized for the inverter. Sungrow lists it as a system fault.

A short spike on the inverter's internal DC bus tripped it. Older Sungrow manuals call this a transient bus overvoltage that clears itself; the current manual lists it as a system fault, and Sungrow Australia links a repeating 019 to a possible solar string short to earth.

The inverter's internal DC bus voltage is too high, most often because the solar string voltage exceeds what the inverter can take. Sungrow lists it as a system fault.

Too much current is coming in on solar input 1, which usually means more strings or panels are wired to that input than it is rated for, or there is a wiring problem on that side of the roof. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

Too much current is coming in on solar input 2, which usually means more strings or panels are wired to that input than it is rated for, or there is a wiring problem on that side of the roof. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

The relay that connects the inverter to the grid failed its self-check. On SG inverters this is normally a hardware fault inside the unit; on SH hybrids it can also be caused by backup and grid wiring being mixed.

An AC or DC overcurrent, or a DC overvoltage, tripped the inverter's protection. Sungrow lists it as a system fault, and Sungrow Australia links a repeating 040 to a possible solar string short to earth.

The inverter's power stage failed its own start-up self-test. Sungrow lists it as a system fault: a restart is worth one try, and a repeat means the unit needs service.

The part of the inverter that steps up the voltage from solar input 1 has a fault. It is internal hardware and Sungrow lists it as a system fault.

The part of the inverter that steps up the voltage from solar input 2 has a fault. It is internal hardware and Sungrow lists it as a system fault.

One of the inverter's internal current measurement circuits is reading wrongly. It is internal hardware and Sungrow lists it as a system fault.

The inverter's backup processor also saw the mains voltage go above the protection limit. It behaves like code 002: a grid condition that clears when the voltage settles.

The two processors inside the inverter stopped talking to each other. Sungrow lists it as a system alarm, so the inverter may keep running, but a repeat after a restart means it needs service.

An internal overvoltage trip on the inverter's output stage. Sungrow's current manuals list 064 only as a system fault: one restart is reasonable, and a repeat needs a service visit. On hybrid inverters it has also been linked to unbalanced backup loads or a changeover switch problem.

A very short internal overvoltage trip on the inverter's output stage. Sungrow's current manuals list 067 only as a system fault: one restart is reasonable, and a repeat needs a service visit. Sungrow Australia has also linked it to mismatched or outdated firmware.

The energy meter or current clamp that tells the inverter which way power is flowing is wired backwards or on the wrong terminal. Production continues but export limits, battery charging and the app's import and export figures will be wrong. Wiring faults need an electrician, so we treat them as a call.

The inverter's output current went above its hardware protection limit. It restarts on its own once the current drops back; Sungrow lists a repeat as a system fault. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

The inverter's grid-side protection failed its own self-check, so it will not connect to the mains. Sungrow lists it as a system fault: one restart is reasonable, and a repeat means the protection circuit needs service.

The inverter measured too much DC in the voltage it puts onto the grid and tripped its protection. Sungrow lists it as a system fault: one restart is reasonable, and a repeat points to a fault in the inverter's output stage.

Sungrow does not publish a specific meaning for 116; it sits in the system fault group and the fault and alarm code list calls it a device abnormality. One full restart is reasonable, and a repeat means the inverter needs a service visit.

The inverter's internal DC bus went above its hardware limit, usually because the solar string voltage is too high for the inverter. Sungrow lists it as a system fault.

The inverter's internal DC bus voltage is too low, which can be very low solar input or a fault in the inverter. Sungrow lists it as a system fault.

The current from the solar array hit the inverter's hardware protection limit. Sungrow lists it as a system fault: it usually means the array is delivering more current than the inverter's input is rated for.

On a hybrid inverter, the relay that switches the house between grid and backup failed its check. It is usually caused by the backup and grid wiring being mixed or a changeover switch problem rather than the inverter itself.

On a hybrid inverter, the relay that feeds the backup circuit failed its check. Earthing or neutral problems on the backup circuit are a common cause.

The inverter had trouble reading its internal memory. It keeps producing; a restart usually clears it and a repeat needs a service check. Internal and hardware faults need testing with the right instruments, so we treat them as a call.

A serious hardware fault inside the inverter. Sungrow says not to power the inverter up again and not to open the DC isolator while current is flowing: it needs a service visit.

The hybrid inverter sees the battery voltage outside its limits (703 low, 711 and 712 high, 715 hardware overvoltage, 717 a combined battery and BMS fault). A loose or reversed battery cable, a deeply drained battery or a faulty battery module are the usual causes.

The battery is too hot (707) or too cold (708) to charge or discharge safely. It usually recovers on its own as the temperature changes; a battery in full sun or a hot enclosed space will keep doing this in summer. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The hybrid inverter has lost communication with the battery's management system, so it cannot charge or discharge the battery. A loose or damaged communication cable, or the battery being switched off, is the usual cause.

The battery power cable is reversed, loose or not connected, so the hybrid inverter will not use the battery. It is a wiring fault that needs an electrician.

The way the solar strings are physically connected does not match the input mode set in the inverter, for example strings paralleled onto an input set to independent. The installer needs to correct the setting or the wiring.

Two or more inverters set up to work together have lost their communication link. Each unit usually keeps producing, but the shared control does not work until the cable or settings are fixed.

The firmware on the inverter's internal boards, or between the inverter and its battery or meter, does not match. The installer or Sungrow needs to update it; it is not something that clears on its own. Internal and hardware faults need testing with the right instruments, so we treat them as a call.

The inverter has lost contact with the energy meter at the switchboard. Production continues, but export limiting and battery control rely on the meter, so the cable or meter needs checking.