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FRONIUS

FRONIUS-error codes

Below you will find a list of common error messages from various brands. Not all error messages are listed here. It is advisable to also consult the manual of the device.
BrandsError codeCauseAction
FroniusSTATE 101AC voltage out of rangeFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 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. If constant, Contact inverter service
FroniusSTATE 103AC voltage too lowFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 104AC frequency out of rangeFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 105AC frequency too highFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 106AC frequency too lowFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 107AC grid outside the permissible limitsFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 108Stand alone operation detectedFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 112RCMU errorFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 201AC 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. If constant, Contact inverter service
FroniusSTATE 202AC voltage too lowFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 203AC frequency too highFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 204AC frequency too lowFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 205Grid failureFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 206Grid failureFollowing careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid. If constant, Contact inverter service
FroniusSTATE 207Relay errorFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 208Relay errorFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 301Overcurrent (AC)Fault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 302Overcurrent (DC)The inverter resumes with its startup routine.
FroniusSTATE 303DC module over temperatureVisual check: cooling circuit air supply. If the blockage cannot be rectified, Contact inverter service
FroniusSTATE 304AC module over temperatureVisual check: cooling circuit air supply. If the blockage cannot be rectified, Contact inverter service
FroniusSTATE 305No power being fed in, despite closed relayFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 306PV output too low for feeding energy into the gridFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 307LOW PV VOLTAGEThe inverter resumes with its startup routine. DC input voltage too low for feeding energy into the grid. 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 not indicate any kind of fault. Contact inverter service
FroniusSTATE 308Intermediate circuit voltage too highDo nothing. The inverter will acknowledge the error automatically. If problem occurs repeatedly, Contact inverter service
FroniusSTATE 309DC input voltage MPPT 1 too highPlease check the DC wiring and measure. If you consider the wiring to be in order, Contact inverter service
FroniusSTATE 311Polarity of DC strings reversedPlease check the DC wiring and measure. If you consider the wiring to be in order, Contact inverter service
FroniusSTATE 313DC input voltage MPPT 2 too highPlease check the DC wiring and measure. If you consider the wiring to be in order, Contact inverter service
FroniusSTATE 314Current sensor calibration timeoutFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 315AC current sensor erroFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 316Interrupt Check failFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 325Overtemperature in the connection areaFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 326Fan 1 errorFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 327Fan 2 errorFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 401No communication possible with the power stage setFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 406AC module temperature sensor faulty (L1)Fault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 407AC module temperature sensor faulty (L2)Fault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 408DC component measured in the grid too highFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 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 valueFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 415Safety cut out via option card or RECERBO has triggeredIf constant, Contact inverter service
FroniusSTATE 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.
FroniusSTATE 417Hardware ID problemPlease arrange for inverter service to perform an update.
FroniusSTATE 419Unique ID conflictIf constant, Contact inverter service
FroniusSTATE 420No communication possible with the Hybrid managerIf constant, Contact inverter service
FroniusSTATE 421HID range errorIf constant, Contact inverter service
FroniusSTATE 425No communication with the power stage set possibleIf constant, Contact inverter service
FroniusSTATE 426-428Possible hardware faultIf constant, Contact inverter service
FroniusSTATE 431Software problem1.) Switch off device with DC disconnector and AC Fuse 2.) Wait until the display has turned off completely. 3.) Switch on device with DC and AC disconnector. If this does not rectify the error, Contact inverter service
FroniusSTATE 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.Please arrange for inverter service to perform an update.
FroniusSTATE 437Power stage set problemPlease arrange for inverter service to perform an update.
FroniusSTATE 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)Please arrange for inverter service to perform an update.
FroniusSTATE 443Intermediate circuit voltage too low or asymmetricIf constant, Contact inverter service
FroniusSTATE 445Compatability error (e.g. due to replacement of a PC board) – invalid power stage set configurationPlease arrange for inverter service to perform an update.
FroniusSTATE 447Insulation faultArrange for the system isolation to be checked by an electrician. If you consider the isolation to be in order, Contact inverter service
FroniusSTATE 448Neutral conductor not connectedPlease check the AC wiring and measure. If you consider the wiring to be in order, Contact inverter service
FroniusSTATE 450Guard cannot be foundPlease check the AC wiring and measure. If you consider the wiring to be in order, Contact inverter service
FroniusSTATE 451Memory error detectedFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 452Communication error between the processorsFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 453Grid voltage and power stage set are incompatibleFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 454Grid frequency and power stage set are incompatibleFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 456Anti-islanding function is no longer implemented correctlyFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 457Grid relay sticking or the neutral conductor ground voltage is too highPlease check the AC wiring and measure. If you consider the wiring to be in order, Contact inverter service
FroniusSTATE 458Error when recording the measuring signalIf constant, Contact inverter service
FroniusSTATE 459Error when recording the measuring signal for the insulation testIf constant, Contact inverter service
FroniusSTATE 460Reference voltage source for the digital signal processor (DSP) is working out of toleranceIf constant, Contact inverter service
FroniusSTATE 461Fault in the DSP data memoryIf constant, Contact inverter service
FroniusSTATE 462Error with DC feed monitoring routineIf constant, Contact inverter service
FroniusSTATE 463Reversed AC polarity, AC connector inserted incorrectlyIf constant, Contact inverter service
FroniusSTATE 474RCMU sensor faultyIf constant, Contact inverter service
FroniusSTATE 475Solar panel ground fault, insulation fault (connection between solar panel and ground)If constant, Contact inverter service
FroniusSTATE 476Driver supply voltage too lowIf constant, Contact inverter service
FroniusSTATE 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)Please arrange for inverter service to perform an update.
FroniusSTATE 482Setup after the initial start-up was interrupted1.) Switch off device with DC disconnector and AC Fuse 2.) Wait until the display has turned off completely. 3.) Switch on device with DC and AC disconnector. If this does not rectify the error, Contact inverter service
FroniusSTATE 483Voltage UDC fixed on MPP2 string out of limitsPlease check the DC wiring and measure. If you consider the wiring to be in order, Contact inverter service
FroniusSTATE 485CAN transmit buffer is full1.) Switch off device with DC disconnector and AC Fuse 2.) Wait until the display has turned off completely. 3.) Switch on device with DC and AC disconnector. If this does not rectify the error, Contact inverter service
FroniusSTATE 502Insulation error on the solar panelsWarning message is shown on the display
FroniusSTATE 509No energy fed into the grid in the past 24 hoursIf constant, Contact inverter service
FroniusSTATE 515No communication with filter possibleIf constant, Contact inverter service
FroniusSTATE 516No communication possible with the storage unitIf constant, Contact inverter service
FroniusSTATE 517Power derating caused by too high a temperatureVisual check: cooling circuit air supply. If the blockage cannot be rectified, Contact inverter service
FroniusSTATE 518Internal DSP malfunctionIf constant, Contact inverter service
FroniusSTATE 519No communication possible with the storage unitIf constant, Contact inverter service
FroniusSTATE 520No energy fed into the grid by MPPT1 in the past 24 hoursPlease check the AC wiring and measure. If you consider the wiring to be in order, Contact inverter service
FroniusSTATE 522DC low string 1Please check the DC wiring and measure. If you consider the wiring to be in order, Contact inverter service
FroniusSTATE 523DC low string 2Please check the DC wiring and measure. If you consider the wiring to be in order, Contact inverter service
FroniusSTATE 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)Please arrange for inverter service to perform an update.
FroniusSTATE 560Derating caused by over-frequencyFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 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)Please arrange for inverter service to perform an update.
FroniusSTATE 566Arc detector switched off (e.g. during external arc monitoring)The STATE code is displayed every day until the arc detector is reactivated. Confirm status code by pressing ‘Enter’.
FroniusSTATE 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.
FroniusSTATE 601CAN bus is fullPlease arrange for inverter service to perform an update.
FroniusSTATE 603AC module temperature sensor faulty (L3)Fault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 604DC module temperature sensor faultyFault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner, Contact inverter service
FroniusSTATE 607RCMU errorReset 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.
FroniusSTATE 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)Please arrange for inverter service to perform an update.
FroniusSTATE 701-716Provides information about the internal processor statusIf constant, Contact inverter service
FroniusSTATE 721EEPROM has been re-initialisedIf constant, Contact inverter service
FroniusSTATE 722-730Provides information about the internal processor statusIf constant, Contact inverter service
FroniusSTATE 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, Contact inverter service
FroniusSTATE 732Initialisation erro – Over current on USB stickConnect or check the USB flash drive. If STATE code is displayed all the time Contact inverter service
FroniusSTATE 733No USB flash drive connectedConnect or check the USB flash drive. If STATE code is displayed all the time Contact inverter service
FroniusSTATE 734Update file not recognised or not presentCheck update file (e.g. for correct file name).
FroniusSTATE 735Update file does not match the device, update file too oldCheck update file (e.g. for correct file name).
FroniusSTATE 736Write or read error occurredCheck USB flash drive and the data contained on it or replace USB flash drive.
FroniusSTATE 737File could not be openedRemove and then reinsert USB flash drive; check or replace USB flash drive
FroniusSTATE 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.
FroniusSTATE 740Initialisation error-error in file system on USB flash driveCheck USB flash drive; reformat on PC for FAT12, FAT16 or FAT32.
FroniusSTATE 741Error during recording of logging dataRemove and then reinsert USB flash drive; check or replace USB flash drive
FroniusSTATE 743Error occurred during update processRepeat the update process, check USB stick. If STATE code is displayed all the time Contact inverter service
FroniusSTATE 745Update file corruptRe-download update file. If STATE code is displayed all the time Contact inverter service
FroniusSTATE 746Error occurred during update processWait for 2 minutes, then start the update again. If STATE code is displayed all the time Contact inverter service
FroniusSTATE 751Time lostReset 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 inverter service
FroniusSTATE 752Real Time Clock module communication errorWarning message on the display
FroniusSTATE 753Internal error: Real Time Clock module is in emergency modeTime may be inaccurate or lost (feeding energy into the grid normal)
FroniusSTATE 754-755Provides information about the processor statusIf STATE code is displayed all the time Contact inverter service
FroniusSTATE 757Hardware error in the Real Time Clock moduleError message is shown on the display; the inverter is not feeding any energy into the grid.
FroniusSTATE 758Internal error: Real Time Clock module is in emergency modeReset time and date on the inverter
FroniusSTATE 760Internal hardware errorIf STATE code is displayed all the time Contact inverter service
FroniusSTATE 761-765Provides information about the internal processor statusWarning message is shown on the display.
FroniusSTATE 766Emergency power de-rating has been activatedError message is shown on the display.
FroniusSTATE 767Provides information about the internal processor statusWarning message is shown on the display.
FroniusSTATE 768Different power limitation in the hardware modulesContact inverter service
FroniusSTATE 772Storage unit not availableWarning message is shown on the display.
FroniusSTATE 773Software update group 0 (invalid country setup)Warning message is shown on the display.
FroniusSTATE 775PMC power stage set not availablePress ‘Enter’ key to acknowledge error. If STATE code is displayed all the time Contact inverter service
FroniusSTATE 781-794Provides information about the internal processor statusIf STATE code is displayed all the time Contact inverter service

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Phone

+32 (0)56 18 58 48

Email

info@inverterservice.be