The Complete Guide To SolaX Inverter Error Codes

The average grid voltage over ten minutes was above the limit, so the inverter disconnected as the rules require. It reconnects itself; if it happens most days the street voltage is high and the network may need to be told.

The grid frequency went outside the inverter's limits for a moment and it disconnected. It reconnects by itself once the grid is steady.

The inverter cannot see mains power on its AC side. Either the power is out, the solar supply main switch is off, or an AC connection is loose; it reconnects by itself when the grid is back.

The mains voltage at the inverter went outside the range it is allowed to export at, so it disconnected. It reconnects by itself; if it happens most sunny afternoons the cable run or the street voltage needs checking.

The inverter lost its lock on the grid waveform, usually poor grid quality or a disturbance. It reconnects by itself when the grid is clean again.

On a hybrid, the appliances on the backup (EPS) circuit are drawing more than the inverter can supply, often an air conditioner, oven or pump starting. Switch off the heavy appliances and restart; if it trips with little connected the inverter needs checking.

The inverter exported more than the hard export limit set for the Australian standard, so it shut down to comply. It usually recovers on its own; if it repeats the export-limit meter or settings need checking.

A string from the panels is connected the wrong way round at the inverter. This is a wiring fault and must be corrected by an electrician.

The voltage from the panels is above what the inverter can accept, usually too many panels in one string, which shows up most on cold clear mornings. The string design needs checking by an electrician.

The inverter's earth connection is missing or poor, or, on units sold here, the neutral-to-earth check has failed. The earthing and the AC neutral and earth wiring need an electrician.

The inverter found too little insulation between the panel wiring and earth, usually water in a connector or isolator, a chafed cable or a damaged panel. Morning-only alarms that clear by midday point to dew; a persistent one is a safety issue and needs an electrician.

The inverter measured current leaking to earth from the solar wiring, usually damaged cable insulation, water in a connector, or high humidity near the coast. Because this is an electrical safety trip, a repeat needs an electrician.

The inverter's own leakage-current sensing circuit has failed its check, as opposed to finding a real leak. If a restart does not clear it the sensor or board inside has failed.

A cooling fan inside the inverter has stopped or is running at the wrong speed, often because it is clogged with dust or has worn out. The inverter may keep running but will overheat on hot days until the fan 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 inverter is below its minimum operating temperature and is waiting to warm up. It clears itself once the day warms.

The inverter's temperature went over its limit, so it cut back or stopped. Usually it is mounted in direct sun or a hot, closed space; it comes back once it cools, but if it happens on ordinary days the fan or heatsink needs a look. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The sensor that measures the inverter's output current has failed. If a restart does not clear it the inverter needs repair.

The voltage on the inverter's internal DC bus is outside its normal range. It can follow a string that is too long, but it is often a fault inside the inverter and needs testing.

The inverter is letting a small amount of DC into its AC output, which the grid rules do not allow. A one-off usually clears with a wait or restart; if it keeps coming back the output stage or its sensor needs testing. DC on the AC side is a protection fault, so we treat it as a call.

On a hybrid, the relay that switches the backup (EPS) circuit failed its self-test. If a restart does not clear it the relay or board has failed.

The inverter's settings memory failed a read or write. A restart sometimes clears it; if it comes back the memory chip or board needs repair. Internal and hardware faults need testing with the right instruments, so we treat them as a call.

The inverter cannot read the export meter or CT clamp in the switchboard, so export limiting and monitoring stop working. The meter wiring and settings need checking.

A general internal fault, which on older units can also mean the panel wiring is connected the wrong way round. If a restart does not clear it the inverter needs testing.

The relay that connects the inverter to the grid failed its self-test. A restart may clear a one-off; a repeat means the relay or power board has failed, which is a job for an electrician.

The inverter's internal measuring circuit is giving readings its two processors cannot agree on, or has misread the model. If a restart does not clear it the control board has a fault.

The processors inside the inverter have stopped talking to each other. It can recover on its own within a few minutes; if a restart does not clear it the control board needs a technician.

The inverter's software saw more current than it allows, either from the panels or on the AC side for an instant. It often clears within seconds; if it repeats the string current and AC connection need checking. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

The inverter's hardware overcurrent protection tripped, often from a heavy appliance starting on the backup circuit of a hybrid, or a short grid disturbance. Wait a short while and it usually recovers; if it keeps tripping with normal loads the inverter needs testing. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

On a hybrid, the battery positive and negative appear to be swapped at the inverter. This is a wiring fault that must be corrected by an electrician; do not keep restarting it.

On a hybrid, the battery voltage is higher or lower than the inverter expects, often a very flat battery or a battery communication problem. Let it charge if it is just low; if the fault stays the battery and its settings need checking.

On a hybrid, the inverter has lost contact with the battery's management system, usually a loose or damaged battery data cable. The battery cable and settings need checking.

On a hybrid with a separate battery charger, the charger's boost stage has gone over its voltage or current limit. Wait to see if it clears; if it stays the charger needs checking by a technician. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

The inverter's control software does not match the hardware it is running on, usually after a bad firmware update. It needs a technician to check the versions and serial number.

The inverter's input mode does not match how the strings are wired, for example two inputs set to parallel when they are separate strings. The installer needs to correct the setting or the wiring.