Error Code Message
STATE 101 Grid voltage beyond permitted limits
STATE 107 Synchronisation with the public mains supply not possible
STATE 108 Islanding detected
STATE 201 Grid voltage beyond permitted limits
STATE 202 Grid voltage is lower than the specified limit
STATE 203 Grid frequency is higher than the specified limit
STATE 204 Grid frequency is lower than the specified limit
STATE 205 Change of public mains impedance
STATE 206 Absolute value of the impedance is too high
STATE 207 Mains relay does not open in spite of switch off signal
STATE 208 Mains relay does not close in spite of switch on signal
STATE 301 Safety circuit detects a current peak on the PV generator side
STATE 303 Heat sink temperature on the DC-AC board is too high
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
STATE 306 POWER LOW
STATE 307 DC LOW
STATE 308 Intermediate circuit voltage out of the maximum limit
STATE 401 Communication error between IG control and the DC-DC board
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
STATE 405 An old or incorrect version of the ENS microprocessors has been recognised
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
STATE 409 Supply of the DC-AC board not available
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
STATE 415 No END-enabling signal despite release by IG-control
STATE 416 Communication error between IG-Control and power stack
STATE 417 Hardware ID-collision
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
STATE 431 All power stacks are in boot mode
STATE 432 Consistent error in power stack management
STATE 433 Allocation error of dynamic addresses
STATE 434 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
STATE 441 Power rack fan faulty
STATE 442 Master for one phase could not be assigned
STATE 443 DC-DC energy transfer failure.
STATE 444 AC monitoring self test interrupted
STATE 501 Heat sink temperature too high, although Fronius IG is on low output
STATE 504 An isolation fault between DC+ or DC- to earth has been detected
STATE 505 The area in the internal memory for the “Setup” values is incomplete
STATE 506 The area in the internal memory for the “Total” values is incomplete
STATE 507 The area in the internal memory for the “Day/Year” values is incomplete
STATE 508 The area in the internal memory for the “WR number” is damaged
STATE 509 No feed in operation for 24 hours
STATE 510 Errors detected by LocalNet self diagnostic system
STATE 511 Errors detected by LocalNet Sensor Card self diagnostic system
STATE 512 According to the device type too many power stacks have been detected
STATE 513 Power stacks in boot mode
STATE 514 Incomplete number of power stacks detected after reaching online threshold – Device type
STATE 515 One or more power stacks notified STATE 406/ 407/ 409/ 410
STATE 516 One power stack exceeds the permitted limit of error messages per day (>50x)
STATE 517 Permanent POWER LOW or DC LOW error