Fronius Fault Codes

Is Your Fronius Inverter Displaying a Fault Code?

We are proud to have been Fronius Service Partners since 2011.

If your Fronius Inverter is displaying a fault code, our service specialists can provide you with assistance by consulting with Fronius and initiate the exchange of components for Fronius products.

To help us help you, you will need to supply us with the following information:

  • The Fronius fault code displayed.
  • The inverter model and number.
  • The serial number.
  • The purchase date to establish the warranty expiry date.

Please browse the table below for the specific fault code information your inverter may be displaying.

FRONIUS PRIMO 5KW e1529553275115 263x300 - Fronius Fault Codes
CodeDescriptionPossible Causes
STATE 102Grid voltage beyond permitted limits
  1. Mains voltage error
  2. Incorrect values in the service menu
  3. Internal fault
STATE 104Mains frequency beyond permitted limits
  1. Mains frequency error
  2. Incorrect values in the service menu
  3. Internal fault
STATE 107Synchronisation with the public mains supply not possible
  1. Mains not connected
  2. Incorrect values in the service menu
  3. Internal fault
STATE 108Islanding detected
  1. Islanding detected
  2. Severe disturbances in public mains
  3. Internal fault
CodeDescriptionPossible Causes
STATE 201Grid voltage is higher than the specified limit
  1. Grid voltage error on the public mains
  2. Internal fault
STATE 202Grid 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
STATE 204Grid frequency is lower than the specified limit
STATE 205Change of public mains impedance
  1. Serious disturbances on the public mains
  2. Internal fault
STATE 206Absolute value of the impedance is too high
  1. Mains impedance too high
  2. Internal fault
STATE 207

Mains relay does not open in spite of switch-off signal

  1. Internal fault
STATE 208

Mains relay does not close in spite of switch-on signal

CodeDescriptionPossible Causes
STATE 301Safety circuit detects a current peak on the mains supply
  1. Voltage drop on the public mains
  2. Internal fault
STATE 302Safety circuit detects a current peak on the PV generator side
  1. Voltage drop on the public mains supply
  2. Internal fault
STATE 303Heat 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
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 limits
  1. Internal Fault
STATE 306POWER LOW
  1. Intermediate circuit voltage has dropped below permissible threshold value for feed-in
STATE 307DC LOW
  1. DC-input voltage is too low for feed in
  2. Internal fault
STATE 308Intermediate circuit voltage out of the maximum limit
  1. Public mains disturbances
  2. Internal fault
CodeDescriptionPossible causes
STATE 401Communication error between IG control and the DC-DC board
  1. Internal fault
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 faulty
  1. Check the public mains
  2. If problem persists please contact Omega Solar and Batteries
STATE 405An old or incorrect version of the ENS microprocessors has been recognised
  1. If problem persists please contact Omega Solar and Batteries
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 detected
  1. Public mains disturbances
  2. Internal fault
STATE 409Supply of the DC-AC board not available
  1. Internal fault
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 faulty
  1. One-off-memory error
  2. Internal fault
STATE 415No END-enabling signal despite release by IG-control
  1. Internal fault
STATE 416Communication error between IG-Control and power stack
  1. One-off-communication error
  2. Internal fault
STATE 417Hardware ID-collision
  1. Internal fault
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 exceeded
  1. One-off error
  2. Internal fault
STATE 431All power stacks are in boot mode
  1. Internal fault
STATE 432Consistent error in power stack management
  1. One-off error
  2. Internal fault
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 transmission
  1. One-off error
  2. Permanent error
STATE 441Power rack fan faulty
  1. Internal fault
STATE 442Master for one phase could not be assigned
  1. Temporary communication error
  2. Internal fault
STATE 443DC-DC energy transfer failure
  1. Error during switching on a power stack
  2. Internal fault
STATE 444AC monitoring self-test interrupted
  1. During the self-test another error occured

If you are having difficulty with your Fronius Inverter, please contact us. 

Our trained Solar Electrician’s can usually have your solar system up and running in one visit as we bring all the parts to your door. This is just one of the reasons we love being a Fronius Service Partner, they make it easy for you to continue generating energy from the sun again! 

 

Add Your Heading Text Here

If you are having difficulty with your Fronius Inverter, please contact us. 

Our trained Solar Electrician’s can usually have your solar system up and running in one visit as we bring all the parts to your door. This is just one of the reasons we love being a Fronius Service Partner, they make it easy for you to continue generating energy from the sun again! 

 

Add Your Heading Text Here

Add Your Heading Text Here

If you are having difficulty with your Fronius Inverter, please contact us. 

Our trained Solar Electrician’s can usually have your solar system up and running in one visit as we bring all the parts to your door. This is just one of the reasons we love being a Fronius Service Partner, they make it easy for you to continue generating energy from the sun again! 

 

Add Your Heading Text Here