Fronius State Codes


Fronius IG Series Inverter STATE codes

Most times your Fronius inverter will give you error messages so you can tell what is going on.  Here is a comprehensive list of all the error codes on Fronius IG inverters
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Fronius STATE codes beginning with 1xx

Fronius STATE codes beginning with 1 usually only occur temporarily and are caused by the power from the street (the grid) being outside the inverters operating parameters. The Fronius inverter reacts by disconnecting from the grid and attempts to switch on again after the specified mains monitoring period, as long as no further errors occur during this period. The STATE code is displayed whilst the grid is being checked.

Code
Description
Possible causes
Remedy (sequence)
STATE 101 Grid voltage beyond permitted limits 1. Mains voltage error
2. Incorrect values in the service menu
3. Internal fault
1. Check grid voltage, check circuit breakers are ON
2. Change values in the service menu
3. If problem persists contact your Fronius Service Partner
STATE 104 Mains frequency beyond permitted limits 1. Mains frequency error
2. Incorrect values in the service menu
3. Internal fault
1. Check mains frequency, check circuit breakers are ON
2. Change values in the service menu
3. If problem persists contact your Fronius Service Partner
4. Find out more about Fronius STATE 104 error codes here
STATE 107 Synchronisation with the public mains supply not possible 1. Mains not connected
2. Incorrect values in the service menu
3. Internal fault
1. Connect mains power, check circuit breakers are ON
2. Check values in the service menu
3. If problem persists contact your Fronius Service Partner
STATE 108 Islanding detected 1. Islanding detected
2. Severe disturbances in public mains
3. Internal fault
1. Automatic correction
2. Automatic correction
3. If problem persists contact your Fronius Service Partner

Fronius STATE codes beginning with 2xx

Fronius STATE codes beginning with 2 are messages from the grid monitoring device (ENS) integrated within the inverter and refer to the parameters of the public mains. Some error checks cross over with the STATE codes beginning with 1, however those in service class 2 are of a higher importance and are displayed for that reason.

Code
Description
Possible causes
Remedy (sequence)
STATE 201 Grid voltage is higher than the specified limit 1. Grid voltage error on the public mains
2. Internal fault
1. Check grid voltage
2. If problem persists contact your Fronius Service Partner
STATE 202 Grid voltage is lower than the specified limit
STATE 203 Grid frequency is higher than the specified limit 1. Grid frequency error on the public mains
2. Internal fault
1. Check grid frequency
2. If problem persists contact your Fronius Service Partner
STATE 204 Grid frequency is lower than the specified limit
STATE 205 Change of public mains impedance 1. Serious disturbances on the public mains
2. Internal fault
1. Reinforce mains cables
2. Connect Fronius IG inverter to another phase
3. If problem persists contact your Fronius Service Partner
STATE 206 Absolute value of the impedence is too high 1. Mains impedence too high
2. Internal fault
STATE 207 Mains relay does not open in spite of switch off signal Internal fault If problem persists contact your Fronius Service Partner
STATE 208 Mains relay does not close in spite of switch on signal

Fronius STATE codes beginning with 3xx

Fronius STATE codes beginning with 3 are error states that can occur during grid feed in operation, however they do not indicate damaged electronics and do not lead to a remaining interruption of the feed in operation. After switching off and passing the grid monitoring period, the Fronius IG inverter will start feed in operation again. In case of a temperature excess additional cooling down phase is maintained.

Code
Description
Possible causes
Remedy (sequence)
STATE 301 Safety circuit detects a current peak on the mains supply 1. Voltage drop on the public mains
2. Internal fault
1. Automatic correction
2. If problem persists contact your Fronius Service Partner
STATE 302 Safety circuit detects a current peak on the PV generator side 1. Voltage drop on the public mains supply
2. Internal fault
1. Automatic correction
2. If problem persists contact your Fronius Service Partner
STATE 303 Heat sink temperature on the DC-AC board is too high 1. Ventilation slot congested
2. Very high ambient temperature
3. Distance between inverters too small
4. Internal fault
1. Free ventilation slot
2. Change location of inverter
3. Increase distance between inverters
4. If problem persists contact your Fronius Service Partner
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 problem persists contact your Fronius Service Partner
STATE 306 POWER LOW Intermediate circuit voltage has dropped below permissible threshold value for feed in 1. Check panels
2. Internal fault
STATE 307 DC LOW 1. DC-input voltage is too low for feed in
2. Internal fault
STATE 308 Intermediate circuit voltage out of the maximum limit 1. Public mains disturbances
2. Internal fault
1. Reinforce mains cable
2. If problem persists contact your Fronius Service Partner

Fronius STATE codes beginning with 4xx

Fronius STATE codes beginning with 4 are error states that require the intervention of a Fronius Service Partner. They are either temporary or lasting and are triggered by faulty hardware or a software problem. Try switching off the Fronius inverter following the system shutdown procedure, leave off for a few minutes then attempt to restart. If the fault continues please contact your local Fronius Service Partner for further assistance.

Code
Description
Possible causes
Remedy (sequence)
STATE 401 Communication error between IG control and the DC-DC board Internal fault If problem persists contact your Fronius Service Partner
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 1. Public mains not connected
2. Internal fault
1. Check the public mains
2.If problem persists contact your Fronius Service Partner
STATE 405 An old or incorrect version of the ENS microprocessors has been recognised Internal fault If problem persists contact your Fronius Service Partner
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 1. Public mains disturbances
2. Internal fault
1. Error is remedied automatically
2. If problem persists contact your Fronius Service Partner
STATE 409 Supply of the DC-AC board not available Internal fault If problem persists contact your Fronius Service Partner
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 1. One-off – memory error
2. Internal fault
1. Error is remedied automatically
2. If problem persists contact your Fronius Service Partner
STATE 415 No END-enabling signal despite release by IG-control Internal fault If problem persists contact your Fronius Service Partner
STATE 416 Communication error between IG-Control and power stack 1. One-off – communication error
2. Internal fault
1. Error is remedied automatically
2. If problem persists contact your Fronius Service Partner
STATE 417 Hardware ID-collision Internal fault If problem persists contact your Fronius Service Partner
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 1. One off error
2. Internal fault
1. Automatic correction
2.If problem persists contact your Fronius Service Partner
STATE 431 All power stacks are in boot mode Internal fault If problem persists contact your Fronius Service Partner
STATE 432 Consistent error in power stack management 1. One off error
2. Internal fault
1. Automatic correction
2.If problem persists contact your Fronius Service Partner
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 1. One-off error
2. Permanent error
1. Automatic correction
2.If problem persists contact your Fronius Service Partner
STATE 441 Power rack fan faulty Internal fault If problem persists contact your Fronius Service Partner
STATE 442 Master for one phase could not be assigned 1. Temporary communication error
2. Internal fault
1. Error is remedied automatically
2. If problem persists contact your Fronius Service Partner
STATE 443 DC-DC energy transfer failure 1. Error during switching on a power stack
2. Internal fault
1. Error is remedied automatically
2. If problem persists contact your Fronius Service Partner
3. Find out more about Fronius STATE 443 error codes here
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 STATE codes beginning with 5xx

Fronius STATE codes beginning with 5 generally do not stop the feed in operation of the Fronius IG inverter. The STATE codes will be displayed until the message is acknowledged by pushing a button on the display (the inverter will work in feed in operation during this time).

Code
Description
Possible causes
Remedy (sequence)
STATE 501 Heat sink temperature too high, although Fronius IG is on low output 1. Ventilation slot congested
2. Internal fault
1. Free ventilation slot
2.If problem persists contact your Fronius Service Partner
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 1. One off error
2. Internal fault
1. Automatic correction
2.If problem persists contact your Fronius Service Partner
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 1. Snow covered or very dirty solar panels
2. Insufficient power from the solar panels for feed in operation
3.Internal error
1. Clean solar panels or remove snow
2. If problem persists contact your Fronius Service Partner
STATE 510 Errors detected by LocalNet self diagnostic system 1. One-off memory error
2. Internal fault
1. Automatic correction
2. If problem persists contact your Fronius Service Partner
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 1. One-off error
2. 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 problem persists contact your Fronius Service Partner

Find out more about State 516 codes here

STATE 516 One power stack exceeds the permitted limit of error messages per day (>50x)
STATE 517 Permanent POWER LOW or DC LOW error

Fronius IG inverter Fronius is an Austrian manufacturer of solar inverters and are well known for their quality and fast response to warranty claims. If you are in Adelaide or surrounding areas and your Fronius IG inverter is giving you problems then contact us here or give us a call – we are here to help ensure that your solar power system keeps working as you expect.

Call us now on 1300 130 546