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
Code Description Possible Causes
STATE 201 Grid voltage is higher than the specified limit
  1. Grid voltage error on the public mains
  2. Internal fault
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
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
STATE 206 Absolute 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

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