Fronius Primo 3.0-1 / 3.5-1 / 3.6-1 / 4.0-1 4.6-1 / 5.0-1 AUS / 5.0-1 5.0-1 SC / 6.0-1 / 8.2-1 Class 4 Error Code

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Fronius Class 4 State Error Codes

Fronius class 4 state errors 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

Behavior

Remedy

STATE 401No communication with power stage set possibleThe 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 406Power stage set temperature sensor faulty
STATE 407Internal temperature sensor faulty
STATE 408DC feeding into the grid detected
STATE 412Fixed voltage mode has been selected instead of MPP voltage mode and the fixed voltage has been set to too low or too high a valueIf this STATE code persists contact your solar power system installer
STATE 415Safety cut out via option card or RECERBO has triggeredThe 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 416No communication possible between the power stage set and control systemThe inverter will automatically attempt to reconnect again and, if possible, will resume feeding energy into the grid.
STATE 417Hardware ID problem
STATE 419Unique ID conflict
STATE 421HID range error
STATE 425No communication possible with the power stage set
STATE 426-428Possible hardware fault
STATE 431Software problemThe 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 436Functional 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 437Power stage set problem
STATE 438Functional 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 443Intermediate circuit voltage too low or asymmetricThe 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 445Invalid limit value settingsThe 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 contacts your local Fronius Service Partner.
STATE 447Insulation faultIf this status code is displayed all the time: notify a local Fronius Service Partner
STATE 448Neutral conductor not connected
STATE 450Guard cannot be found
STATE 452Memory error detectedThe 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 452Communication error between the processors
STATE 453Short term grid voltage error
STATE 454Short term grid frequency error
STATE 456An anti-islanding function is no longer implemented correctly
STATE 457Grid relay stickingThe inverter is not feeding any energy into the grid.Contact your local Fronius Service Partner.
STATE 459Error when recording the measuring signal for the insulation test
STATE 460Reference voltage source for the digital signal processor (DSP) is working out of tolerance
STATE 461Fault in the DSP data memory
STATE 462Error with DC feed monitoring routine
STATE 463Reversed AC polarity, AC connector inserted incorrectly
STATE 474RCMU sensor faultyIf this STATE code keeps recurring, contact your solar power system installer
STATE 475Solar panel ground fault, insulation fault (the connection between solar panel and ground)
STATE 476Driver supply voltage too low
STATE 480, 481Functional 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 482Startup incompletePerform AC reset (turn AC circuit breaker off and on), complete startup.
STATE 483Voltage UDC fixed on MPP2 string out of limitsCheck the MPP settings; if the status code is displayed all the time contact your local Fronius Service Partner
STATE 485CAN transmit buffer is fullCarry 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.
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