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Fronius Primo Inverter STATE Codes



Inspire Energy is a Fronius Service Partner, meaning that if you’re in the South West Sydney or Wollongong region, and own a Fronius inverter which develops a fault, you can contact us here and we’ll get your solar power system back in action ASAP.

Inspire Energy are trained by Fronius to provide a quick and efficient warranty service, limiting any down time as much as possible. If your inverter is still under warranty the costs will be covered by Fronius.

If you are not in the South West Sydney or Wollongong region, you can find your local Fronius Service Partner here.

When a Fronius inverter has a fault it usually comes up with a STATE code to explain what is wrong. The following table lists the Fronius Primo series inverter STATE codes so you can get an idea on what your Fronius Primo inverter is trying to communicate and how you can fix it.

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 supply and attempts to switch on again after the specified mains monitoring period, as long as no further errors happen during this time. The STATE code is displayed whilst the grid is being checked.

Code

Description

Behaviour

Solution

STATE 102

AC voltage too high

Following careful testing and when the grid conditions are within the permissible range again, the inverter will resume feeding energy into the grid.

Check grid connections: If this STATE code keeps recurring contact your solar power system installer.

STATE 103

AC voltage too low

STATE 105

AC frequency too high

STATE 106

AC frequency too low

STATE 107

AC grid outside the permissible limits

STATE 108

Stand alone operation detected

STATE 112

RCMU error

 

Fronius STATE codes beginning with 3xx

Fronius Primo STATE codes beginning with 3 are status codes that may occur while feeding energy into the grid, but usually do not cause the process to be interrupted for any length of time.

The inverter disconnects automatically from the grid, the grid is then monitored as specified and the inverter attempts to resume feeding energy into the grid.

 

Code

Description

Behaviour

Solution

STATE 301

Overcurrent (AC)

Short-term interruption while feeding energy into the grid due to over current in the inverter.
The inverter resumes with its startup routine.

Fault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner.

STATE 302

Overcurrent (DC)

STATE 303

Power stage set over temperature

Short term interruption while feeding energy into the grid due to over temperature.
The inverter resumes with its startup routine.

Purge openings for cooling air and heat sink if necessary; fault is rectified automatically; if this STATE code keeps recurring contact your solar power system installer.

STATE 304

Internal temperature too high

STATE 306

LOW PV OUTPUT
Intermediate circuit voltage too low for feeding energy into the grid

Short term interruption while feeding energy into the grid.
The inverter resumes with its startup routine.

Fault is rectified automatically; if this STATE code occurs when there is sufficient insolation (sunlight) contact your solar power system installer.
IMPORTANT! Due to the low level of insolation (sunlight) early in the morning and in the evening, the STATE codes 306 (LOW PV OUTPUT) and 307 LOW PV VOLTAGE) are displayed routinely at these times of day. These STATE codes do not indicate any kind of fault.

STATE 307

LOW PV VOLTAGE
DC input voltage too low for feeding energy into the grid

STATE 308

Intermediate circuit overvoltage

Short term interruption while feeding energy into the grid. The inverter resumes with its startup routine.

Fault is rectified automatically; if this STATE code is displayed all the time: notify your local Fronius service partner.

STATE 309

DC input voltage MPPT 1 too high

STATE 313

DC input voltage MPPT 2 too high

 

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

Behaviour

Solution

STATE 401

No communication with power stage set possible

The inverter will automatically attempt to connect again and, if possible, will resume feeding energy into the grid.

If the STATE code is displayed all the time contact your local Fronius Service Partner

STATE 406

Power stage set temperature sensor faulty

STATE 407

Internal temperature sensor faulty

STATE 408

DC feeding into the grid detected

STATE 412

Fixed voltage mode has been selected instead of MPP voltage mode and the fixed voltage has been set to too low or too high a value

If this STATE code persists contact your solar power system installer

STATE 415

Safety cut out via option card or RECERBO has triggered

The inverter is not feeding any energy into the grid.

If the STATE code is displayed all the time contact your local Fronius Service Partner

STATE 416

No communication possible between power stage set and control system

The inverter will automatically attempt to reconnect again and, if possible, will resume feeding energy into the grid.

STATE 417

Hardware ID problem

STATE 419

Unique ID conflict

STATE 421

HID range error

STATE 425

No communication possible with the power stage set

STATE 426-428

Possible hardware fault

STATE 431

Software problem

The inverter is not feeding any energy into the grid.

Carry out an AC reset (switch the AC circuit breaker off and on); update the inverter firmware; if this status code is displayed all the time please contact your local Fronius Service Partner.

STATE 436

Functional incompatibility (one or more PC boards in the inverter are not compatible with each other, e.g. after a PC board has been replaced.

The inverter will automatically attempt to connect again and, if possible, will resume feeding energy into the grid.

Update the inverter firmware; if this status code is displayed all the time please contact your local Fronius Service Partner.

STATE 437

Power stage set problem

STATE 438

Functional incompatibility (one or more PC boards in the inverter in the inverter are not compatible with each other, e.g. after a PC board has been replaced)

STATE 443

Intermediate circuit voltage too low or asymmetric

The inverter is not feeding any energy into the grid.

If the status code is displayed all the time contact your local Fronius Service Partners.

STATE 445

Invalid limit value settings

The inverter is not feeding any energy into the grid for safety reasons.

Update the inverter firmware with the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner.

STATE 447

Insulation fault

If this status code is displayed all the time: notify a local Fronius Service Partner

STATE 448

Neutral conductor not connected

STATE 450

Guard cannot be found

STATE 452

Memory error detected

The inverter will automatically attempt to connect again, and if possible, will resume feeding energy into the grid.

If the STATE code is displayed all the time: notify your local Fronius Service Partner.

STATE 452

Communication error between the processors

STATE 453

Short term grid voltage error

STATE 454

Short term grid frequency error

STATE 456

Anti-islanding function is no longer implemented correctly

STATE 457

Grid relay sticking

The inverter is not feeding any energy into the grid.

Contact your local Fronius Service Partner.

STATE 459

Error when recording the measuring signal for the insulation test

STATE 460

Reference voltage source for the digital signal processor (DSP) is working out of tolerance

STATE 461

Fault in the DSP data memory

STATE 462

Error with DC feed monitoring routine

STATE 463

Reversed AC polarity, AC connector inserted incorrectly

STATE 474

RCMU sensor faulty

If this STATE code keeps recurring, contact your solar power system installer

STATE 475

Solar panel ground fault, insulation fault (connection between solar panel and ground)

STATE 476

Driver supply voltage too low

STATE 480, 481

Functional incompatibility (one or more PC boards in the inverter are not compatible with each other, e.g. after a PC board has been replaced)

Update the inverter firmware with the latest firmware here; if the STATE code persists contact your local Fronius Service Partner

STATE 482

Startup incomplete

Perform AC reset (turn AC circuit breaker off and on), complete startup.

STATE 483

Voltage UDC fixed on MPP2 string out of limits

Check the MPP settings; if the status code is displayed all the time contact your local Fronius Service Partner

STATE 485

CAN transmit buffer is full

Carry out an AC reset (turn AC circuit breaker off and on), if the STATE code continues to be displayed notify your local Fronius Service Partner.

 

 

Fronius STATE codes beginning with 5xx

Fronius STATE codes beginning with 5 generally do not stop the feed in operation of the Fronius Primo 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

Behaviour

Solution

STATE 502

Insulation error on the solar panels

Warning message is shown on the display

If this STATE code keeps recurring, contact your solar power system installer.

STATE 509

No energy fed into the grid in the past 24 hours

Acknowledge STATE code; check whether all the conditions for the problem free feeding of energy into the grid have been met. If the STATE code is displayed all the time: look out for further STATE codes.

STATE 515

No communication with filter possible

If the status code is displayed all the time notify your local Fronius Service Partner.

STATE 516

No communication possible with the storage unit

Storage unit warning message.

STATE 517

Derating caused by too high a temperature

When power derating occurs, a warning message is shown on the display

Purge cooling air openings and heat sink if necessary; fault is rectified automatically; if this STATE code keeps recurring contact your solar power system installer.

STATE 522

DC1 Input Voltage too low

The DC voltage on input 1 of the inverter is too low

Check voltage & polarity on input 1 of the inverter. If this STATE code keeps recurring please contact your solar power system installer.

STATE 523

DC2 Input Voltage too low

The DC voltage on input 2 of the inverter is too low

Check voltage & polarity on input 2 of the inverter. Check MPP settings / voltage at the “Installer Menu Basic”. If this STATE code keeps recurring please contact your solar power system installer.

STATE 558

Functional incompatibility (one or more PC boards in the inverter are not compatible with each other, e.g. after a PC board has been replaced)

Possible error displays or malfunction on the inverter

If this STATE code keeps recurring contact your solar power system installer.

STATE 560

Derating caused by over-frequency

This STATE code is displayed when the grid frequency becomes excessively high. The inverter will then reduce its output. The status indicator will continue to be displayed until the inverter has returned to normal operation.

As soon as the grid frequency is back within the permissible range and the inverter has returned to normal operation, the fault is rectified automatically. If this STATE code keep recurring contact your solar power system installer.

STATE 566

Arc detector switched off (e.g. during external arc monitoring)

The STATE code is displayed every day until the arc detector is reactivated.

No error, Confirm status code by pressing ‘Enter’.

STATE 567

Grid Voltage Dependent Power Reduction is active

This state code is a warning informing you that the Grid Voltage Dependent Power Reduction mode (GVDPR or Volt – Watt mode) has been activated and the inverter will continue to operate with reduced power output. This is because the grid voltage has exceeded 250Vac and the GVDPR has been enabled to try to reduce the voltage rise at the inverters terminals. This mode must be enabled by default in accordance with the latest Australian Standards.

Acknowledge status code; if this STATE 567 code keeps recurring contact your local solar power system installer.
Find out more about the STATE 567 message here

 

Fronius STATE codes beginning with 7xx

Class 7 STATE codes on Fronius Primo inverters relate to the control system, the configuration and inverter data recording, and may directly or indirectly affect the process of feeding energy into the grid.

 

Code

Description

Behaviour

Solution

STATE 705

Conflict when setting the inverter number (e.g. number already assigned)

Correct the inverter number via the setup menu

STATE 721

EEPROM has been reinitialised or EEPROM is faulty

Warning message is shown on the display

Acknowledge STATE code; If the STATE code is displayed all the time contact your local Fronius Service Partner

STATE 731

Initialisation error – USB stick is not supported

Check or replace USB stick. Check the file system on the USB stick. If the STATE code is displayed all the time notify your local Fronius Service Partner.

STATE 732

Over current on USB stick

STATE 733

No USB stick connected

Connect or check the USB stick. If STATE code is displayed all the time contact your local Fronius Service Partner.

STATE 734

Update file not recognised or not present

Check update file (e.g. for correct file name). If STATE code is displayed all the time contact your local Fronius Service Partner.

STATE 735

Update file does not match the device, update file too old

Warning message appears on the display, update process is interrupted.

Update the inverter firmware with the latest firmware here; if the STATE code is displayed all the time after the firmware update contact your local Fronius Service Partner. If STATE code is displayed all the time contact your local Fronius Service Partner.

STATE 736

Write or read error occurred

Warning message is shown on the display

Check USB stick and the data contained on it or replace USB stick.
Never unplug a USB stick if the ‘Data Transmission’ LED is still flashing or lit.
If the STATE code is displayed all the contact your local Fronius Service Partner.

STATE 738

Log file cannot be saved (e.g. USB stick is write protected or full)t

Create storage space, remove write protection, check or replace USB stick if necessary.
If STATE code is displayed all the time contact your local Fronius Service Partner.

STATE 743

Error occurred during update process

Repeat the update process, check USB stick. If STATE code is displayed all the time contact your local Fronius Service Partner.

STATE 745

Update file corrupt

Warning message appears on the display, update process is interrupted.

Redownload the with the latest firmware here. If STATE code is displayed all the time contact your local Fronius Service Partner.

STATE 751

Time lost

Warning message is shown on the display

Reset the time and date on the inverter. Check update file (e.g. for correct file name). If STATE code is displayed all the time contact your local Fronius Service Partner.

STATE 752

Real Time Clock module communication error

STATE 757

Hardware error in the Real Time Clock module

Error message is shown on the display; the inverter is not feeding any energy into the grid.

If STATE code is displayed all the time contact your local Fronius Service Partner.

STATE 758

Internal error: Real Time Clock module is in emergency mode

Time may be inaccurate or lost (feeding energy into the grid normal)..

STATE 766

Emergency power de-rating has been activated

Error message is shown on the display.