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 101Grid voltage beyond permitted limits1. 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 104Mains frequency beyond permitted limits1. 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 107Synchronisation with the public mains supply not possible1. 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 108Islanding detected1. 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 201Grid voltage is higher than the specified limit1. Grid voltage error on the public mains
2. Internal fault
1. Check grid voltage
2. If problem persists contact your Fronius Service Partner
STATE 202Grid voltage is lower than the specified limit
STATE 203Grid frequency is higher than the specified limit1. Grid frequency error on the public mains
2. Internal fault
1. Check grid frequency
2. If problem persists contact your Fronius Service Partner
STATE 204Grid frequency is lower than the specified limit
STATE 205Change of public mains impedance1. 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 206Absolute value of the impedence is too high1. Mains impedence too high
2. Internal fault
STATE 207Mains relay does not open in spite of switch off signalInternal faultIf problem persists contact your Fronius Service Partner
STATE 208Mains 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 301Safety circuit detects a current peak on the mains supply1. Voltage drop on the public mains
2. Internal fault
1. Automatic correction
2. If problem persists contact your Fronius Service Partner
STATE 302Safety circuit detects a current peak on the PV generator side1. Voltage drop on the public mains supply
2. Internal fault
1. Automatic correction
2. If problem persists contact your Fronius Service Partner
STATE 303Heat sink temperature on the DC-AC board is too high1. 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 304Heat sink temperature on the DC-DC board is too high
STATE 305Feed-in process not possible, even though public mains parameter within the limitsInternal faultIf problem persists contact your Fronius Service Partner
STATE 306POWER LOWIntermediate circuit voltage has dropped below permissible threshold value for feed in1. Check panels
2. Internal fault
STATE 307DC LOW1. DC-input voltage is too low for feed in
2. Internal fault
STATE 308Intermediate circuit voltage out of the maximum limit1. 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 401Communication error between IG control and the DC-DC boardInternal faultIf problem persists contact your Fronius Service Partner
STATE 402Write access to the internal Fronius IG memory failed
STATE 403The area in the internal memory for the country setting is incomplete
STATE 404Connection between the control unit and the ENS is faulty1. Public mains not connected
2. Internal fault
1. Check the public mains
2.If problem persists contact your Fronius Service Partner
STATE 405An old or incorrect version of the ENS microprocessors has been recognisedInternal faultIf problem persists contact your Fronius Service Partner
STATE 406Temperature sensor on the DC-AC board faulty or not connected
STATE 407Temperature sensor on the DC-DC board faulty or not connected
STATE 408Unsymmetry on the public mains detected1. Public mains disturbances
2. Internal fault
1. Error is remedied automatically
2. If problem persists contact your Fronius Service Partner
STATE 409Supply of the DC-AC board not availableInternal faultIf problem persists contact your Fronius Service Partner
STATE 410Service plug on the DC-AC board is not set correctly
STATE 412Value for fixed voltage is set higher than the open circuit voltage of the PV generator
STATE 413Open circuit voltage too high in the moment of transformer switching
STATE 414Memory array for Fronius IG type in EE-PROM faulty1. One-off – memory error
2. Internal fault
1. Error is remedied automatically
2. If problem persists contact your Fronius Service Partner
STATE 415No END-enabling signal despite release by IG-controlInternal faultIf problem persists contact your Fronius Service Partner
STATE 416Communication error between IG-Control and power stack1. One-off – communication error
2. Internal fault
1. Error is remedied automatically
2. If problem persists contact your Fronius Service Partner
STATE 417Hardware ID-collisionInternal faultIf problem persists contact your Fronius Service Partner
STATE 419Two or more power stacks with identical Unique ID
STATE 420Incomplete number of power stacks detected after reaching online threshold according to device type
STATE 421Hardware ID sequence error
STATE 425Receive time-out for data exchange with one or more power stacks exceeded1. One off error
2. Internal fault
1. Automatic correction
2.If problem persists contact your Fronius Service Partner
STATE 431All power stacks are in boot modeInternal faultIf problem persists contact your Fronius Service Partner
STATE 432Consistent error in power stack management1. One off error
2. Internal fault
1. Automatic correction
2.If problem persists contact your Fronius Service Partner
STATE 433Allocation error of dynamic addresses
STATE 434Ground fault detected
STATE 435Wrong configuration for EE-Prom
STATE 436Error transmission faulty
STATE 437Power stack work around is active
STATE 438Error during state code transmission1. One-off error
2. Permanent error
1. Automatic correction
2.If problem persists contact your Fronius Service Partner
STATE 441Power rack fan faultyInternal faultIf problem persists contact your Fronius Service Partner
STATE 442Master for one phase could not be assigned1. Temporary communication error
2. Internal fault
1. Error is remedied automatically
2. If problem persists contact your Fronius Service Partner
STATE 443DC-DC energy transfer failure1. 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 444AC monitoring self test interruptedDuring the self test another error occuredQuit 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 501Heat sink temperature too high, although Fronius IG is on low output1. Ventilation slot congested
2. Internal fault
1. Free ventilation slot
2.If problem persists contact your Fronius Service Partner
STATE 502An isolation fault between DC+ or DC- to earth has been detectedIsolation fault at the solar generatorCheck cables and solar generator
STATE 504An error occured while scanning LocalNet addressesIdentical Fronius IG address used twiceCheck address of the inverters and other components
STATE 505The area in the internal memory for the “Setup” values is incomplete1. One off error
2. Internal fault
1. Automatic correction
2.If problem persists contact your Fronius Service Partner
STATE 506The area in the internal memory for the “Total” values is incomplete
STATE 507The area in the internal memory for the “Day/Year” values is incomplete
STATE 508The area in the internal memory for the “WR number” is damaged
STATE 509No feed in operation for 24 hours1. 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 510Errors detected by LocalNet self diagnostic system1. One-off memory error
2. Internal fault
1. Automatic correction
2. If problem persists contact your Fronius Service Partner
STATE 511Errors detected by LocalNet Sensor Card self diagnostic system
STATE 512According to the device type too many power stacks have been detected1. One-off error
2. Internal fault
STATE 513Power stacks in boot mode
STATE 514Incomplete number of power stacks detected after reaching online threshold – Device type
STATE 515One or more power stacks notified STATE 406/ 407/ 409/ 410Internal faultIf problem persists contact your Fronius Service Partner

Find out more about State 516 codes here

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