Inverter fault codes

This page contains a list of error messages or fault codes that can appear on SOLARRWATT Inverter vision, and suggested remedies for each.

Error code	Remedy
Grid Lost Fault	Grid is interrupted System will restart when power supply is back to normal
Grid Volt Fault	Grid voltage outside the normal range System switches back on when the power supply returns to normal
Grid Freq Fault	Grid frequency outside the normal range System switches back on when the power supply returns to normal
PLL_OverTime	Three-phase system accessing single-phase alternating current System switches back on when the power supply returns to normal
10min Volt Fault	Mains voltage has been outside the normal range for the last 10 minutes System switches back on when the power supply returns to normal
SW Inv Cur Fault	High output current detected by the software Update software so that the master contains at least software version 1.69 Disconnect PV, mains and battery and then reconnect them
DCI Fault	The DC-related input current is outside the limit value Disconnect PV, grid and battery and then reconnect them
HW Inv Cur Fault	High output current detected by the hardware. Disconnect PV, grid and battery and then reconnect them
SW Bus Vol Fault	Out of range bus voltage detected by the software. Check whether the N line is connected to the GRID connection of the inverter Update software so that the master contains at least software version 1.69 Disconnect PV, grid and battery and then reconnect them
Bat Volt Fault	battery voltage error. Check that the battery input voltage is within the normal range
SW Bat Cur Fault	high battery current detected by the software. Disconnect the PV, mains and battery and then reconnect them
Iso Fault	the insulation is faulty. Check whether the insulation of the electrical cables is damaged Wait a while to check whether the condition returns to normal
Res Cur Fault	the fault current is high. Check whether the insulation of the electrical cables is damaged. Wait a while to check whether the condition returns to normal
PV Volt Fault	PV voltage outside the tolerance range. Check the output voltage of the PV modules
SW PV Cur Fault	the software has detected a high PV input current. Disconnect PV, grid and battery and then reconnect them
Temp Fault	the temperature of the inverter is high. Check the ambient temperature Wait for a while to check if the temperature normalizes
Ground fault	the grounding is faulty. Check the voltage of the neutral conductor and PE Check the AC wiring Disconnect PV, grid and battery and then reconnect them
Over Load Fault	Overload in grid operation. Check whether the output power exceeds the limit value
Eps Over Load	Overload in grid replacement mode. Check whether the power of the EPS load exceeds the limit value
Bat Power Low	The battery power is low. Wait until the battery is charged
HW Bus Vol Fault	Bus voltage detected by the hardware is outside the standard range. Disconnect PV, grid and battery and then reconnect them
HW PV Cur Fault	high PV input current detected by the hardware. Check whether PV plus and minus are connected Disconnect PV, grid and battery and then reconnect them
HW Bat Cur Fault	high battery current detected by the hardware. Disconnect PV, grid and battery and then reconnect them
SCI Fault	Communication between Master and Manager has failed. Disconnect PV, grid and battery and then reconnect them Attempt to carry out a firmware update If this fails, contact SOLARWATT Service
MDSP SPI Fault	Communication between master and slave has failed. Disconnect PV, mains and battery and then reconnect them
MDSP Smpl Fault	The master sample detector circuit has failed. Disconnect PV, mains and battery and then reconnect them
Res Cur HW Fault	residual current detection has failed. Disconnect PV, mains and battery and then reconnect them
Inv EEPROM Fault	The inverter EEPROM battery is faulty. Disconnect the PV, grid and battery and then reconnect them
PvCon Dir Fault	The PV connections are reversed. Check whether the positive and negative poles of the PV are connected correctly
Bat Relay Open	the battery relay is open. Disconnect the PV, mains and battery and then reconnect them
Bat Relay Short Circuit	the battery relay is closed. Disconnect the PV, mains and battery and then reconnect them
Bat Buck Fault	The MOSFET of the battery voltage reduction circuit is defective. Disconnect the PV, grid and battery and then reconnect them
Bat Boost Fault	The MOSFET of the battery boost circuit is faulty or the relay on the battery side of the inverter is not closed. To update to the latest software, make sure at least that the master is updated to 1.69 or higher. Disconnect the PV, grid and battery and then reconnect them
Eps Relay Fault	The EPS relay has failed. Disconnect the PV plants, the grid and the battery and reconnect them
BatCon Dir Fault	The battery connections are reversed. Check whether the positive and negative terminals of the battery are connected correctly
Grid Relay Fault	The grid relay is open or closed. Disconnect the PV, grid and battery and then reconnect them
RDSP SPI Fault	Communication between master and slave has failed. Disconnect the PV, mains and battery and then reconnect them
RDSP Smpl Fault	The slave sample detector circuit has failed. failed. Disconnect PV, mains and battery and then reconnect them
ARM EEPROM Fault	The Manager's EEPROM is faulty. Disconnect the PV, mains and battery and then reconnect it
Meter Lost Fault G100 State 3	Communication between meter and inverter is interrupted. Check whether the communication cable between the meter and inverter is connected correctly
BMS Lost	Communication between BMS and inverter is interrupted. Check whether the BMS cable is connected correctly
BMS Ext Fault	Communication between BMS and inverter is interrupted. Check whether the BMS cable is connected correctly
BMS Int Fault	DIP switch in the wrong position Communication between the Battery packs is interrupted. Move the DIP switch to the correct position Check whether the connector between the Battery packs is correct
other error messages	Contact SOLARWATT Service.