Fronius Symo Fault Codes

 

Fronius Symo fault codes beginning with 1xx

 

Code
Description
Behaviour
Remedy
STATE 102AC voltage too highFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid.Check grid connections: If this STATE code keeps recurring contact your solar power system installer.
STATE 103AC voltage too low
STATE 105AC frequency too high
STATE 106AC frequency too low
STATE 107AC grid outside the permissible limits
STATE 108Stand alone operation detected
STATE 112RCMU error

 

Fronius Symo fault codes beginning with 3xx

 

Code
Description
Behaviour
Remedy
STATE 301Overcurrent (AC)Short-term interruption while feeding energy into the grid due to over current in the inverter.
The inverter resumes with its startup routine.
Fault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner.
STATE 302Overcurrent (DC)
STATE 303DC module over temperatureShort term interruption while feeding energy into the grid due to over temperature.
The inverter resumes with its startup routine.
Purge openings for cooling air and heat sink if necessary; fault is rectified automatically; if this STATE code keeps recurring contact your solar power system installer.
STATE 304AC module over temperature
STATE 305No power being fed in, despite closed relayShort term interruption while feeding energy into the grid due to over temperature.
The inverter resumes with its startup routine.
fault is rectified automatically; if this STATE code keeps recurring contact your solar power system installer.
STATE 306PV output too low for feeding energy into the gridShort term interruption while feeding energy into the grid.
The inverter resumes with its startup routine.
Fault is rectified automatically; if this STATE code occurs when there is sufficient insolation (sunlight) contact your solar power system installer.
IMPORTANT! Due to the low level of insolation (sunlight) early in the morning and in the evening, the STATE codes 306 (LOW PV OUTPUT) and 307 LOW PV VOLTAGE) are displayed routinely at these times of day. These STATE codes do notindicate any kind of fault.
STATE 307LOW PV VOLTAGE
DC input voltage too low for feeding energy into the grid
STATE 308Intermediate circuit voltage too highShort term interruption while feeding energy into the grid. The inverter resumes with its startup routine.Fault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner.
STATE 309DC input voltage MPPT 1 too high
STATE 311Polarity of DC strings reversed
STATE 313DC input voltage MPPT 2 too high
STATE 314Current sensor calibration timeoutShort term interruption while feeding energy into the grid. The inverter resumes with its startup routine.Fault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner.
STATE 315AC current sensor erro
STATE 316Interrupt Check fail
STATE 325Overtemperature in the connection area
STATE 326Fan 1 error
STATE 327Fan 2 error

 

Fronius Symo fault codes beginning with 4xx

 

Code
Description
Behaviour
Remedy
STATE 401No communication possible with the power stage setThe inverter will automatically attempt to connect again and, if possible, will resume feeding energy into the grid.If the STATE code is displayed all the time contact your local Fronius Service Partner
STATE 406AC module temperature sensor faulty (L1)
STATE 407AC module temperature sensor faulty (L2)
STATE 408DC component measured in the grid too high
STATE 412Fixed voltage mode has been selected instead of MPP voltage mode and the fixed voltage has been set to too low or too high a valueIf this STATE code persists contact your solar power system installer
STATE 415Safety cut out via option card or RECERBO has triggeredThe inverter is not feeding any energy into the grid.If the STATE code is displayed all the time contact your local Fronius Service Partner
STATE 416No communication possible between power stage set and control systemThe inverter will automatically attempt to reconnect again and, if possible, will resume feeding energy into the grid.
STATE 417Hardware ID problemUpdate the inverter firmwarewith the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner.
STATE 419Unique ID conflict
STATE 420No communication possible with the Hybrid manager
STATE 421HID range error
STATE 425No communication with the power stage set possible
STATE 426-428Possible hardware fault
STATE 431Software problemThe inverter is not feeding any energy into the grid.Carry out an AC reset (switch the AC circuit breaker off and on); update inverter firmware; if this status code is displayed all the time please contact your local Fronius Service Partner.
STATE 436Functional incompatibility (one or more PC boards in the inverter are not compatible with each other, e.g. after a PC board has been replaced.The inverter will automatically attempt to connect again and, if possible, will resume feeding energy into the grid.Update the inverter firmwarewith the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner.
STATE 437Power stage set problem
STATE 438Functional incompatibility (one or more PC boards in the inverter in the inverter are not compatible with each other, e.g. after a PC board has been replaced)
STATE 443Intermediate circuit voltage too low or asymmetricThe inverter is not feeding any energy into the grid.If the status code is displayed all the time contact your local Fronius Service Partners.
STATE 445– Compatability error (e.g. due to replacement of a PC board)
– invalid power stage set configuration
The inverter is not feeding any energy into the grid for safety reasons.Update the inverter firmwarewith the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner.
STATE 447Insulation faultIf this status code is displayed all the time: notify a local Fronius Service Partner
STATE 448Neutral conductor not connected
STATE 450Guard cannot be found
STATE 451Memory error detectedThe inverter will automatically attempt to connect again, and if possible, will resume feeding energy into the grid.If the STATE code is displayed all the time: notify your local Fronius Service Partner.
STATE 452Communication error between the processors
STATE 453Grid voltage and power stage set are incompatible
STATE 454Grid frequency and power stage set are incompatible
STATE 456Anti-islanding function is no longer implemented correctly
STATE 457Grid relay sticking or the neutral conductor ground voltage is too highThe inverter is not feeding any energy into the grid.Check the grounding (the neutral conductor ground voltage must be less than 30V. If problem persists contact your local Fronius Service Partner.
STATE 458Error when recording the measuring signalContact your local Fronius Service Partner.
STATE 459Error when recording the measuring signal for the insulation test
STATE 460Reference voltage source for the digital signal processor (DSP) is working out of tolerance
STATE 461Fault in the DSP data memory
STATE 462Error with DC feed monitoring routine
STATE 463Reversed AC polarity, AC connector inserted incorrectly
STATE 474RCMU sensor faulty
STATE 475Solar panel ground fault, insulation fault (connection between solar panel and ground)
STATE 476Driver supply voltage too low
STATE 480, 481Functional incompatibility (one or more PC boards in the inverter are not compatible with each other, e.g. after a PC board has been replaced)Update the inverter firmwarewith the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner.
STATE 482Setup after the initial start-up was interruptedPerform AC reset (turn AC circuit breaker off and on), complete startup.
STATE 483Voltage UDC fixed on MPP2 string out of limitsCheck the MPP settings; if the status code is displayed all the time contact your local Fronius Service Partner
STATE 485CAN transmit buffer is fullCarry out an AC reset (turn AC circuit breaker off and on), if the STATE code continues to be displayed notify your local Fronius Service Partner.

 

Fronius Symo fault codes beginning with 5xx

 

Code
Description
Behaviour
Remedy
STATE 502Insulation error on the solar panelsWarning message is shown on the displayIf this STATE code keeps recurring, contact your solar power system installer.
STATE 509No energy fed into the grid in the past 24 hoursAcknowledge STATE code; check whether all the conditions for the problem free feeding of energy into the grid have been met. If the STATE code is displayed all the time: look out for further STATE codes.
STATE 515No communication with filter possibleIf the status code is displayed all the time notify your local Fronius Service Partner.
STATE 516No communication possible with the storage unitStorage unit warning message.
STATE 517Power derating caused by too high a temperatureWhen power derating occurs, a warning message is shown on the displayPurge cooling air openings and heat sink if necessary; fault is rectified automatically; if this STATE code keeps recurring contact your solar power system installer.
STATE 518Internal DSP malfunctionWarning message on the displayIf this STATE code keeps recurring contact your solar power system installer.
STATE 519No communication possible with the storage unitStorage unit warning message
STATE 520No energy fed into the grid by MPPT1 in the past 24 hoursWarning message is shown on the displayAcknowledge status code; check whether all the conditions for the problem free feeding of energy into the grid has been met. If this STATE code keeps recurring contact your solar power system installer.
STATE 522DC low string 1Warning message on the display
STATE 523DC low string 2
STATE 558, 559Functional incompatibility (one or more PC boards in the inverter are not compatible with each other, e.g. after a PC board has been replaced)Update the inverter firmwarewith the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner.
STATE 560Derating caused by over-frequencyThis STATE code is displayed when the grid frequency becomes excessively high. The inverter will then reduce its output. The status indicator will continue to be displayed until the inverter has returned to normal operation.As soon as the grid frequency is back within the permissible range and the inverter has returned to normal operation, the fault is rectified automatically. If this STATE code keep recurring contact your solar power system installer.
STATE 564Functional incompatibility (one or more PC boards in the inverter are not compatible with each other, e.g. after a PC board has been replaced)Warning message on the displayUpdate the inverter firmwarewith the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner.
STATE 566Arc detector switched off (e.g. during external arc monitoring)The STATE code is displayed every day until the arc detector is reactivated.No error
Confirm status code by pressing ‘Enter’.
STATE 567Grid Voltage Dependent Power Reduction is activeThis state code is a warning informing you that the Grid Voltage Dependent Power Reduction mode (GVDPR or Volt – Watt mode) has been activated and the inverter will continue to operate with reduced power output. This is because the grid voltage has exceeded 250Vac and the GVDPR has been enabled to try to reduce the voltage rise at the inverters terminals. This mode must be enabled by default in accordance with the latest Australian Standards.Acknowledge status code; if this STATE 567 code keeps recurring contact your local solar power system installer.
Find out more about the STATE 567 message here

Fronius Symo fault codes beginning with 6xx

 

Code
Description
Behaviour
Remedy
STATE 601CAN bus is fullThe inverter is not feeding any energy into the grid.Update the inverter firmwarewith the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner.
STATE 603AC module temperature sensor faulty (L3)The inverter will automatically attempt to connect again and, if possible, will resume feeding energy into the grid.If this STATE code keeps recurring contact your solar power system installer.
STATE 604DC module temperature sensor faulty
STATE 607RCMU errorThe inverter is not feeding any energy into the grid.Reset status code by pressing ‘Enter’. The inverter resumes the feeding of energy into the grid; if the status code keeps appearing, check the complete solar system for damage.
STATE 608Functional incompatibility (one or more PC boards in the inverter are not compatible with each other, e.g. after a PC board has been replaced)Update the inverter firmwarewith the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner.

Fronius Symo fault codes beginning with 7xx  

Code
Description
Behaviour
Remedy
STATE 701-716Provides information about the internal processor statusWarning message is shown on the displayIf the STATE code is displayed all the time notify your local Fronius Service Partner.
STATE 721EEPROM has been re-initialisedAcknowledge STATE code; If the STATE code is displayed all the time contact your local Fronius Service Partner
STATE 722-730Provides information about the internal processor statusIf the STATE code is displayed all the time contact your local Fronius Service Partner
STATE 731Initialisation error – USB flash drive is not supportedCheck or replace USB flash drive. Check the file system on the USB flash drive. If the STATE code is displayed all the time notify your local Fronius Service Partner.
STATE 732Initialisation erro – Over current on USB stick
STATE 733No USB flash drive connectedConnect or check the USB flash drive. If STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 734Update file not recognised or not presentCheck update file (e.g. for correct file name). If STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 735Update file does not match the device, update file too oldWarning message appears on the display, update process is interrupted.Check the update file with the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner.
STATE 736Write or read error occurredWarning message is shown on the displayCheck USB flash drive and the data contained on it or replace USB flash drive.
Never unplug a USB flash drive if the ‘Data Transmission’ LED is still flashing or lit.
If the STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 737File could not be openedRemove and then reinsert USB flash drive; check or replace USB flash drive
STATE 738Log file cannot be saved (e.g. USB flash drive is write protected or full)Create storage space, remove write protection, check or replace USB stick if necessary.
If STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 740Initialisation error-error in file system on USB flash driveCheck USB flash drive; reformat on PC for FAT12, FAT16 or FAT32.
STATE 741Error during recording of logging dataRemove and then reinsert USB flash drive; check or replace USB flash drive
STATE 743Error occurred during update processRepeat the update process, check USB stick. If STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 745Update file corruptWarning message appears on the display, update process is interrupted.Re-download update file. If STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 746Error occurred during update processWait for 2 minutes, then start the update again. If STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 751Time lostWarning message is shown on the displayReset the time and date on the inverter. Check update file (e.g. for correct file name). If STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 752Real Time Clock module communication error
STATE 753Internal error: Real Time Clock module is in emergency modeTime may be inaccurate or lost (feeding energy into the grid normal)
STATE 754-755Provides information about the processor statusWarning message on the displayIf STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 757Hardware error in the Real Time Clock moduleError message is shown on the display; the inverter is not feeding any energy into the grid.
STATE 758Internal error: Real Time Clock module is in emergency modeTime may be inaccurate or lost (feeding energy into the grid normal).Reset time and date on the inverter
STATE 760Internal hardware errorError message is shown on the display.If STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 761-765Provides information about the internal processor statusWarning message is shown on the display.
STATE 766Emergency power de-rating has been activatedError message is shown on the display.
STATE 767Provides information about the internal processor statusWarning message is shown on the display.
STATE 768Different power limitation in the hardware modules
STATE 772Storage unit not available
STATE 773Software update group 0 (invalid country setup)
STATE 775PMC power stage set not availableWarning message is shown on the display.Press ‘Enter’ key to acknowledge error. If STATE code is displayed all the time contact your local Fronius Service Partner.
STATE 776Invalid device type
STATE 781-794Provides information about the internal processor statusWarning message is shown on the display.If STATE code is displayed all the time contact your local Fronius Service Partner.

 

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