Fronius Fault Codes

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To further assist you, we will need the following: Fronius fault codes displayed Inverter model and no

Purchase date – establishes warranty expiry date Next step – One of our service specialists will consult with Fronius and if necessary initiate the exchange of components for Fronius products or a whole device

The site visit from our trained Solar Electrician can have your solar system up and running in usually one visit, as we bring all the parts to your door

This is one reason we love dealing with Fronius products, they make it so easy to get you back up and generating energy from the sun again! Please browse the tables below for the specific fault code information your inverter is displaying

FRONIUS FAULT CODES 1XX Code Description Possible Causes Troubleshooting Steps STATE 101 Grid voltage beyond permitted limits Mains voltage error Incorrect values in the service menu Internal fault Check grid voltage, check circuit breakers are ON Change Values in the service menu If the problem persists please contact Omega Solar and Batteries STATE 104 Mains frequency beyond permitted limits Mains frequency error Incorrect values in the service menu Internal fault Check mains frequency, check circuit breakers are ON Change values in the service menu If the problem persists please contact Omega Solar and Batteries STATE 107 Synchronisation with the public mains supply not possible Mains not connected Incorrect values in the service menu Internal fault Check mains power, check circuit breakers are ON Change values in the service menu If the problem persists please contact Omega Solar and Batteries STATE 108 Islanding detected Islanding detected Severe disturbances in public mains Internal fault Automatic correction If the problem persists please contact Omega Solar and Batteries FRONIUS FAULT CODES 2XX Code Description Possible Causes Troubleshooting Steps STATE 201 Grid voltage is higher than the specified limit Grid voltage error on the public mains Internal fault Check grid voltage If the problem persists, please contact Omega Solar and Batteries STATE 202 Grid voltage is lower than the specified limit STATE 203 Grid frequency is higher than the specified limit Grid frequency error on the public mains Internal fault Check grid frequency If the problem persists, please contact Omega Solar and Batteries STATE 204 Grid frequency is lower than the specified limit STATE 205 Change of public mains impedance Serious disturbances on the public mains Internal fault Reinforce mains cables Connect Fronius IG inverter to another phase If the problem persists please contact Omega Solar and Batteries STATE 206 Absolute value of the impedance is too high Mains impedance too high Internal fault STATE 207 Mains relay does not open in spite of switch-off signal Internal fault If problem persists, please contact Omega Solar and Batteries STATE 208 Mains relay does not close in spite of switch-on signal FRONIUS FAULT CODES 3XX Code Description Possible Causes Troubleshooting Steps STATE 301 Safety circuit detects a current peak on the mains supply Voltage drop on the public mains Internal fault Automatic correction If the problem persists please contact Omega Solar and Batteries STATE 302 Safety circuit detects a current peak on the PV generator side Voltage drop on the public mains supply Internal fault Automatic correction If the problem persists please contact Omega Solar and Batteries STATE 303 Heat sink temperature on the DC-AC board is too high Ventilation slot congested Very high ambient temperature Distance between inverters too small Internal fault Free ventilation slot Change location of the inverter Increase distance between inverters If the problem persists please contact Omega Solar and Batteries STATE 304 Heat sink temperature on the DC-DC board is too high STATE 305 Feed-in process not possible, even though public mains parameter within the limits Internal Fault If the problem persists please contact Omega Solar and Batteries STATE 306 POWER LOW Intermediate circuit voltage has dropped below permissible threshold value for feed-in Check panels Internal fault If the problem persists, please contact Omega Solar and Batteries STATE 307 DC LOW DC-input voltage is too low for feed in Internal fault STATE 308 Intermediate circuit voltage out of the maximum limit Public mains disturbances Internal fault Reinforce mains cable If the problem persists, please contact Omega Solar and Batteries FRONIUS FAULT CODES 4XX Code Description Possible causes Troubleshooting Steps STATE 401 Communication error between IG control and the DC-DC board Internal fault If problem persists please contact Omega Solar and Batteries STATE 402 Write access to the internal Fronius IG memory failed STATE 403 The area in the internal memory for the country setting is incomplete STATE 404 Connection between the control unit and the ENS is faulty Public mains not connected Internal fault Check the public mains If problem persists please contact Omega Solar and Batteries STATE 405 An old or incorrect version of the ENS microprocessors has been recognised Internal fault If problem persists please contact Omega Solar and Batteries STATE 406 Temperature sensor on the DC-AC board faulty or not connected STATE 407 Temperature sensor on the DC-DC board faulty or not connected STATE 408 Unsymmetry on the public mains detected Public mains disturbances Internal fault Error is remedied automatically If problem persists please contact Omega Solar and Batteries STATE 409 Supply of the DC-AC board not available Internal fault If your problem persists please contact Omega Solar and Batteries STATE 410 Service plug on the DC-AC board is not set correctly STATE 412 Value for fixed voltage is set higher than the open circuit voltage of the PV generator STATE 413 Open circuit voltage too high in the moment of transformer switching STATE 414 Memory array for Fronius IG type in EE-PROM faulty One-off-memory error Internal fault Error is remedied automatically If problem persists please contact Omega Solar and Batteries STATE 415 No END-enabling signal despite release by IG-control Internal fault If problem persists please contact Omega Solar and Batteries STATE 416 Communication error between IG-Control and power stack One-off-communication error Internal fault Error is remedied automatically If problem persists please contact Omega Solar and Batteries STATE 417 Hardware ID-collision Internal fault If problem persists please contact Omega Solar and Batteries STATE 419 Two or more power stacks with identical Unique ID STATE 420 Incomplete number of power stacks detected after reaching online threshold according to device type STATE 421 Hardware ID sequence error STATE 425 Receive time-out for data exchange with one or more power stacks exceeded One-off error Internal fault Automatic correction If problem persists please contact Omega Solar and Batteries STATE 431 All power stacks are in boot mode Internal fault If problem persists please contact Omega Solar and Batteries STATE 432 Consistent error in power stack management One-off error Internal fault Automatic correction If problem persists please contact Omega Solar and Batteries STATE 433 Allocation error of dynamic addresses STATE 434 Ground fault detected STATE 435 Wrong configuration for EE-Prom STATE 436 Error transmission faulty STATE 437 Power stack work around is active STATE 438 Error during state code transmission One-off error Permanent error Automatic correction If problem persists please contact Omega Solar and Batteries STATE 441 Power rack fan faulty Internal fault If problem persists please contact Omega Solar and Batteries STATE 442 Master for one phase could not be assigned Temporary communication error Internal fault Error is remedied automatically If problem persists please contact Omega Solar and Batteries STATE 443 DC-DC energy transfer failure Error during switching on a power stack Internal fault Error is remedied automatically If problem persists please contact Omega Solar and Batteries STATE 444 AC monitoring self-test interrupted During the self-test another error occured Quit the self-test by pressing ESC and remedy the failure according to the error code list FRONIUS FAULT CODES 5XX Code Description Possible causes Troubleshooting Steps STATE 501 Heat sink temperature too high, although Fronius IG is on low output Ventilation slot congested Internal fault Free ventilation slot If the problem persists please contact Omega Solar and Batteries STATE 502 An isolation fault between DC+ or DC- to earth has been detected Isolation fault at the solar generator Check cables and solar generator STATE 504 An error occured while scanning LocalNet addresses Identical Fronius IG address used twice Check address of the inverters and other components STATE 505 The area in the internal memory for the “Setup” values is incomplete One-off error Internal fault Automatic correction If the problem persists please contact Omega Solar and Batteries STATE 506 The area in the internal memory for the “Total” values is incomplete STATE 507 The area in the internal memory for the “Day/Year” values is incomplete STATE 508 The area in the internal memory for the “WR number” is damaged STATE 509 No feed in operation for 24 hours Snow covered or very dirty solar panels Insufficient power from the solar panels for feed-in operation Internal error Clean solar panels or remove snow If the problem persists please contact Omega Solar and Batteries STATE 510 Errors detected by LocalNet self diagnostic system One-off memory error Internal fault Automatic correction If the problem persists please contact Omega Solar and Batteries STATE 511 Errors detected by LocalNet Sensor Card self diagnostic system STATE 512 According to the device type, too many power stacks have been detected One-off error Internal fault STATE 513 Power stacks in boot mode STATE 514 Incomplete number of power stacks detected after reaching online threshold – Device type STATE 515 One or more power stacks notified STATE 406/ 407/ 409/ 410 Internal fault If the problem persists please contact Omega Solar and Batteries STATE 516 One power stack exceeds the permitted limit of error messages per day (>50x) STATE 517 Permanent POWER LOW or DC LOW error If you are having any issues troubleshooting your Fronius fault codes, please do not hesitate to contact Omega Solar and Batteries on 1300 663 422

We will be able to help with any difficult troubleshooting steps and talk you through them to try and help you prevent a technician callout

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