Inverter Error Codes

The table below lists inverter error codes you may see on your solar system.

You will notice that a lot of the codes are due to grid voltage variations which the inverter responds to. There is no fault with these and nothing to be done until the grid voltage normalises.

Many old cheap inverters break and cannot be fixed. EnviroGroup runs a dedicated service department, and we may be able to assist in resolving your inverter issue and get you back up and running again.

Book a solar service today and we will send one of our licensed solar electricians to make an assessment of your system.

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SMA SUNNYBOY 2000HF / 2500HF / 3000HF

Error Display

Meaning

Solution

1 < Grid fault >

The line voltage is above the acceptable maximum and the inverter has disconnected from the grid as a safety measure.

Check the grid voltage and connection on the inverter.

If the voltage is outside the tolerance range, ask your utility grid supplier for a solution.

If the voltage is within the tolerance range and the error code remains, contact us for an inspection.

2 < Grid fault >

The line voltage is below the acceptable minimum and the inverter has disconnected from the grid as a safety measure.

Check for tripping of the miniature circuit-breaker.

Check the grid voltage and connection on the inverter.

If the voltage is outside the tolerance range, ask your utility grid supplier for a solution.

If the voltage is within the tolerance range and the error code remains, contact us for an inspection.

3 < Grid fault >

The average voltage over 10 minutes is not within the acceptable range. The inverter has disconnected.

Check the grid voltage and connection on the inverter.

If the voltage is outside the tolerance range, ask your utility grid supplier for a solution.

If the voltage is within the tolerance range and the error code remains, contact us for an inspection.

4 < Grid fault >

The inverter is no longer in grid parallel operation and has stopped feed‑in operation for safety reasons.

Check the grid connection for strong, short‑term frequency variations.

5 < Grid fault >

The power frequency is outside the acceptable range. The inverter has disconnected itself from the grid as a safety measure.

Check the power frequency - if there are frequent major fluctuations, discuss with your grid operator.

6 < Grid fault >

The inverter has detected high proportion of direct current in the grid current

Check the grid connection for direct current. If the problem persists, seek advice from your utility grid supplier.

7 < Frq. not permitted >

The power frequency is outside the acceptable range. The inverter has disconnected itself from the grid as a safety measure.

Check the power frequency - if there are frequent major fluctuations, discuss with your grid operator.

8 < Waiting for grid voltage >

< Grid failure >

< Check fuse >

Faulty fuse, faulty ac installation, general power outage

Check fuse.

Check AC installation.

Check whether there is a general power outage.

33 < Unstable operation >

There is not enough power at the DC input of the inverter for stable operation.

Check there is nothing obstructing the panels.

Wait for more sunlight.

If there is nothing blocking the panels and it is sunny, contact us for a consultation

34< DC overvoltage >

< Disconnect generator >

The DC input voltage connected to the inverter is too high

Immediately disconnect the inverter from the PV array.

Call EnviroGroup for an inspection of the string voltage before reconnecting to ensure the inverter won’t be damaged by high input.

35< Insulation resist. >

< Check generator >

The inverter has detected a ground fault in the PV array. The inverter continues feeding into the grid.

Call EnviroGroup to check your system for ground faults

35 < Ground fuse fault >

< Check ground fuse >

The inverter has detected a ground voltage in the grounding path.

Check the ground fuse.

Check the strings for ground faults.

Contact EnviroGroup to remedy and reconnect the affected string.

38 < DC overcurrent >

< Check generator >

The inverter switches off due to an overcurrent on the DC side.

If this event occurs frequently call EnviroGroup for a consultation

39< Waiting for DC start conditions >

< Start cond. not met >

The feed‑in power or feed‑in voltage of the PV modules is insufficient for feeding into the power distribution grid.

Check that there are no obstructions to the panels

Wait for more sunlight

If the error code appears when there is sunlight and the panels are clear, call EnviroGroup for a consultation

42< Wrong earthing type; check earthing set >

The SMA Plug‑in Grounding polarity does not correspond to the polarity set in the inverter.

Contact EnviroGroup to correct the grounding type.

60, 61, 62, 63, 64

< Self diagnosis >

< Interference device >

Internal error

Contact EnviroGroup for a consultation

65< Self diagnosis >

< Over-temperature >

The temperature is too high, the inverter switches off

Check ventilation

Check heat dissipation

Call EnviroGroup for a consultation

66< Self-diagnosis >

< Overload >

The system is experiencing overload

Call EnviroGroup for a consultation

67 < Comm. disturbed >

A fault has occurred in the internal communication of the inverter. However, the inverter continues feeding into the grid

If this event occurs frequently, call EnviroGroup for a consultation

68< Self-diagnosis >

< Input A defective >

Call EnviroGroup for a consultation

70< Sensor fault fan permanently on >

Call EnviroGroup for a consultation

71< SD card defective >

The SD card is faulty

Re-format the SD card

71 < Parameter file not found or defective >

The parameter file is faulty

Copy the parameter file into the card drive:\PARASET directory.

71 < Param. setting failed >

The parameter file is faulty

• Check the parameters for valid values.

• Ensure change rights via SMA Grid Guard Code.

71 < Update file defect. >

The parameter file is faulty

• Re‑format the SD card.

• Re‑save the files to the SD card.

71 < No update file found>

The parameter file is faulty

• Copy the update file into the SD card drive:\UPDATE directory.

72 < Data stor. not poss. >

An internal device fault that does not prevent the inverter from feeding power to the grid.

If this event occurs frequently, call EnviroGroup for a consultation

73 < Update main CPU failed >

Internal device fault.

Call EnviroGroup for a consultation

< Update RS485I module failed >

An internal device fault that does not prevent the inverter from feeding power to the grid.

Re‑try update. If this fault occurs again, call EnviroGroup for a consultation

< Update Bluetooth failed >

An internal device fault that does not prevent the inverter from feeding power to the grid.

Re‑try update. If this fault occurs again, call EnviroGroup for a consultation

< Upd. display failed >

An internal device fault that does not prevent the inverter from feeding power to the grid.

Re‑try update. If this fault occurs again, call EnviroGroup for a consultation

< Update language table failed >

An internal device fault that does not prevent the inverter from feeding power to the grid.

Re‑try update. If this fault occurs again, call EnviroGroup for a consultation

74 < Varistor defective >

There is a fault with the varistor

Call EnviroGroup for a consultation

75 < Fan fault >

< Clean fan >

There is a blockage or fault with the inverter fan

Check fan

Check heat disspation

77< Self

diagnosis >

< Interference device >

The inverter has encountered a fault.

Call EnviroGroup for a consultation

80 < Derating occurred >

The power supplied by the inverter was reduced to below the nominal power due to high temperature for more than10 minutes.

Check ventilation

Check heat dissipation

81 < Comm. disturbed >

A fault has occurred in the internal communication of the inverter. However, the inverter continues feeding into the grid.

If this event occurs frequently, Call EnviroGroup for a consultation

90 < Inst. code invalid >

The SMA Grid Guard Code entered (personal installer password) is invalid.

Enter a valid SMA Grid Guard Code

90 < Grid param. locked >

The current country data set is locked.

Enter the valid SMA Grid Guard Code for changing the country data set.

90 < Abort self‑test >

The self-test has been aborted.

Contact EnviroGroup for a consultation

90 < Changing grid param. not possible >

The selected rotary switch setting for the country configuration is not programmed.

• The parameters to be changed are protected.

Check the setting of the rotary switch (see section 5.3.2 "Checking the Country Standard" (page 24)).

• Enter the SMA Grid Guard Code.

90 < Ensure DC supply >

The DC voltage for the writing procedure is not sufficient.

• Ensure that sufficient DC voltage is available.

SUNNY BOY 3000TL / 3600TL / 4000TL / 5000TL / 6000TL

Error Display	Meaning	Solution
101 to 103 - Grid fault	The grid voltage or grid impedance at the connection point of the inverter is too high. The inverter has disconnected from the utility grid.	Check the grid voltage and connection on the inverter. If the voltage is outside the tolerance range, ask your utility grid supplier for a solution. If the voltage is within the tolerance range and the error code remains, contact us for an inspection.
202 to 203, 205 - Grid fault	The utility grid has been disconnected, the AC cable is damaged or the grid voltage at the connection point of the inverter is too low. The inverter has disconnected from the utility grid.	Make sure that the circuit breaker is switched on Make sure that the AC cable is not damaged. Make sure that the AC cable is correctly connected. Check the grid voltage and connection on the inverter. If the voltage is outside the tolerance range, ask your utility grid supplier for a solution. If the voltage is within the tolerance range and the error code remains, contact us for an inspection.
301 - Grid fault	The average voltage over 10 minutes is not within the acceptable range. The inverter has disconnected.	Check the grid voltage and connection on the inverter. If the voltage is outside the tolerance range, ask your utility grid supplier for a solution. If the voltage is within the tolerance range and the error code remains, contact us for an inspection.
401 - Grid fault	The inverter is no longer in grid-parallel operation.	Check the grid connection for significant short-term frequency fluctuations If the problem persists, contact EnviroGroup for a consultation or ask your utility grid supplier.
501 - Grid fault	The power frequency is outside the acceptable range. The inverter has disconnected itself	The power frequency is outside the acceptable range. The inverter has disconnected itself
601 - Grid fault	The inverter has detected high proportion of direct current in the grid current	Check the grid connection for direct current. If the problem persists, seek advice from your utility grid supplier.
701 - Frq. not permitted > Check parameter	The power frequency is outside the acceptable range. The inverter has disconnected itself	The power frequency is outside the acceptable range. The inverter has disconnected itself
801 - Waiting for grid voltage > Grid failure > Check AC circuit breaker	The AC cable is not correctly connected or the country data set is not correctly configured.	Ensure that the AC cable is correctly connected (see the operating manual of the inverter). Ensure that the country data set has been configured to Australia Check the fuse
901 - PE conn. missing > Check connection	There is an issue with the grounding conductor	Call EnviroGroup for a consultation
1001 - L/N swapped > Check connection	The connection of L and N is swapped.	Call EnviroGroup for a consultation
1501 - Reconnection fault grid	The country data is not configured correctly	Check the country your inverter is configured to Call EnviroGroup for a consultation
3301 to 3303 - Unstable operation	The average voltage over 10 minutes is not within the acceptable range. The inverter has disconnected.	Check the grid voltage and connection on the inverter. If the voltage is outside the tolerance range, ask your utility grid supplier for a solution. If the voltage is within the tolerance range and the error code remains, contact us for an inspection.
3304 - Gen. output too low	There is not enough power at the DC input of the inverter for stable operation.	Check there is nothing obstructing the panels. Wait for more sunlight. If there is nothing blocking the panels and it is sunny, contact us for a consultation
3401 to 3402 -DC overvoltage > Disconnect generator	The DC input voltage connected to the inverter is too high	Immediately disconnect the inverter from the PV array. Call EnviroGroup for an inspection of the string voltage before reconnecting to ensure the inverter won’t be damaged by high input.
3501 - Insulation failure > Check generator	The inverter has detected a ground fault in the PV array.	Call EnviroGroup to check your system for ground faults
3601 - High discharge curr. > Check generator	The leakage currents of the inverter and the PV array are too high. There is a ground fault, a residual current or a malfunction.	Call EnviroGroup to check your system for ground faults
3701 - Resid.curr.too.high > Check generator	The inverter has detected a residual current due to temporary grounding of the PV array.	Call EnviroGroup to check your system for ground faults
3801 to 3802 - DC overcurrent > Check generator	The inverter switches off due to an overcurrent on the DC side.	If this event occurs frequently call EnviroGroup for a consultation
3901 to 3902 - Waiting for DC start conditions > Start cond. not met	The feed‑in power or feed‑in voltage of the PV modules is insufficient for feeding into the power distribution grid.	Check that there are no obstructions to the panels Wait for more sunlight If the error code appears when there is sunlight and the panels are clear, call EnviroGroup for a consultation or speak to your utility grid supplier
6001 to 6438 - Self-diagnosis > Interference device	The inverter has detected interference	If this event occurs frequently call EnviroGroup for a consultation
6501 to 6502 - Self-diagnosis > Overtemperature	The temperature is too high, the inverter switches off	Check ventilation Check heat dissipation Call EnviroGroup for a consultation
7008 - Disturbance sensor display temperature		If this event occurs frequently call EnviroGroup for a consultation
7101 - SD card defective	The SD memory card is not formatted.	Re-format the SD memory card. Re-save the files to the SD memory card
7102 - Parameter file not found or defective	The parameter file was not found or is defective. The update failed. The inverter continues feeding power into the grid.	If this event occurs frequently call EnviroGroup for a consultation
7105 - Param. setting failed	It was not possible to set the parameter via the SD memory card. The inverter continues feeding power into the grid.	Check the parameters for valid values. Ensure change rights via SMA Grid Guard code.
7106 - Update file defect.	Update file on the SD memory card is faulty	Re-format the SD memory card. Re-save the files to the SD memory card
7110 - No update file found	No update file has been found.	Copy the update file in the SD memory card folder. Select the folder \UPDATE.
7201 to 7202 -Data stor. not poss..	Internal error. The inverter continues to feed into the utility grid	Contact EnviroGroup for a consultation.
7303 - Update main CPU failed	The latest update failed.	Contact EnviroGroup for a consultation.
7305 - Update RS485I module failed	Internal error. The inverter continues to feed into the utility grid.	Update the inverter firmware. If this code is consistently displayed after the update, contact EnviroGroup for a consultation.
7307 - Update BT failed	Internal error. The inverter continues to feed into the utility grid.	Update the inverter firmware. If this code is consistently displayed after the update, contact EnviroGroup for a consultation.
7311 - Update language table failed	Internal error. The inverter continues to feed into the utility grid.	Update the inverter firmware. If this code is consistently displayed after the update, contact EnviroGroup for a consultation.
7401 - Varistor defective	At least one of the thermally monitored varistors is defective	Contact EnviroGroup for a consultation.
7508 - External fan fault	The external fan is defective or blocked	Ensure that the fan is clean. Ensure that the external fan is correctly connected If this code is consistently displayed, contact EnviroGroup for a consultation.
8001 - Derating occurred	The inverter has reduced its power output for more than ten minutes due to excessive temperature.	Clean the cooling fins on the rear of the enclosure and the air ducts on the top using a soft brush. Ensure that the inverter has sufficient ventilation. If this code is consistently displayed, contact EnviroGroup for a consultation.
8801 to 8803 - No display	There is a display error	Contact EnviroGroup for a consultation.
9002 - Inst. code invalid	The SMA Grid Guard code entered is incorrect.	Enter the correct SMA Grid Guard code.
9003 - Grid param. locked	The parameters are now locked. You cannot change the parameters.	Unlock the parameters with the SMA Grid Guard code.
9005 - Changing grid param. not possible > Ensure DC supply	The selected rotary switch setting for the country configuration is not programmed. The parameters to be changed are protected. The DC voltage at the DC input is not sufficient to run the main CPU	Ensure that the country data set has been configured correctly. Enter the SMA Grid Guard code. Ensure that sufficient DC voltage is available (green LED is glowing or flashing). If this code is consistently displayed, contact EnviroGroup for a consultation.

Fronius Codes

Error Display	Meaning	Solution
STATE 102	AC voltage too high	Check connection to the grid. If the problem persists, contact EnviroGroup for a consultation or ask your utility grid supplier.
STATE 103	AC voltage too low	Check connection to the grid. If the problem persists, contact EnviroGroup for a consultation or ask your utility grid supplier.
STATE 105	AC frequency too high	Check connection to the grid. If the problem persists, contact EnviroGroup for a consultation or ask your utility grid supplier.
STATE 106	AC frequency too low	Check connection to the grid. If the problem persists, contact EnviroGroup for a consultation or ask your utility grid supplier.
STATE 107	AC grid outside the permissible limits	Check connection to the grid. If the problem persists, contact EnviroGroup for a consultation or ask your utility grid supplier.
STATE 108	Stand alone operation detected	Check connection to the grid. If the problem persists, contact EnviroGroup for a consultation or ask your utility grid supplier.
STATE 112	RCMU error	Check connection to the grid. If the problem persists, contact EnviroGroup for a consultation or ask your utility grid supplier.
STATE 301	Short term interruption due to AC overcurrent.	The fault should automatically be remedied. If the error code persists contact EnviroGroup for service advice.
STATE 302	Short term interruption due to DC overcurrent.	The fault should automatically be remedied. If the error code persists contact EnviroGroup for service advice.
STATE 303	Short term interruption due to power stage set over temperature	Check openings for cooling air and heat sink if necessary; fault is rectified automatically; if this code keeps recurring contact your solar power system installer.
STATE 304	Internal temperature too high	Check vents and cooling system, if the problem persists contact a solar installer
STATE 306	Intermediate circuit voltage too low for feeding energy into the grid	If this code appears even with sufficient sunlight, consult EnviroGroup for a solution. If the code appears early morning/late evening when sunlight is minimal, it is part of routine operations and NOT an indicator of a fault.
STATE 307	DC input voltage too low for feeding energy into the grid	If this code appears even with sufficient sunlight, consult EnviroGroup for a solution. If the code appears early morning/late evening when sunlight is minimal, it is part of routine operations and NOT an indicator of a fault.
STATE 308	Intermediate circuit overvoltage	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 309	DC input voltage MPPT 1 too high	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 311	Polarity of DC strings reversed	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 313	DC input voltage MPPT 2 too high	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 314	Current sensor calibration timeout	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 315	AC current sensor error	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 316	Interrupt Check fail	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 325	Overtemperature in the connection area	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 326	Fan 1 error	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 327	Fan 2 error	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 401	No communication with power stage set possible	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 406	Power stage set temperature sensor faulty	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 407	Internal temperature sensor faulty	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 408	DC feeding into the grid detected	If this code is consistently displayed, contact EnviroGroup for a consultation.
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 code is consistently displayed, contact EnviroGroup for a consultation.
STATE 415	Safety cut out via option card or RECERBO has triggered. The inverter is not feeding any energy into the grid.	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 416	No communication possible between power stage set and control system	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 417	Hardware ID problem	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 419	Unique ID conflict	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 420	No communication possible with the Hybrid manager	Update the inverter firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 421	HID range error	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 425	No communication possible with the power stage set	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 426-428	Possible hardware fault	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 431	Software problem	Switch the AC circuit breaker off and on. Update the inverter firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 436	One or more PC boards in the inverter are not compatible with each other	The inverter will automatically attempt to correct this error. Update the inverter firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 437	Power stage set problem	The inverter will automatically attempt to correct this error. Update the inverter firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 438	One or more PC boards in the inverter are not compatible with each other	The inverter will automatically attempt to correct this error. Update the inverter firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 443	Intermediate circuit voltage too low or asymmetric	Update the inverter firmware. If this code is consistently displayed after the update, contact EnviroGroup for a consultation.
STATE 445	Invalid limit value settings	Update the inverter firmware. If this code is consistently displayed after the update, contact EnviroGroup for a consultation. The inverter has disconnected from the grid as a safety measure.
STATE 447	Insulation fault	If this code is consistently displayed after the update, contact EnviroGroup for a consultation. The inverter has disconnected from the grid as a safety measure.
STATE 448	Neutral conductor not connected	If this code is consistently displayed after the update, contact EnviroGroup for a consultation. The inverter has disconnected from the grid as a safety measure.
STATE 450	Guard cannot be found	If this code is consistently displayed after the update, contact EnviroGroup for a consultation. The inverter has disconnected from the grid as a safety measure.
STATE 451	Memory error detected	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 452	Memory error detected	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 452	Communication error between the processors	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 453	Short term grid voltage error	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 454	Short term grid frequency error	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 456	Anti-islanding function is no longer implemented correctly	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 457	Grid relay sticking	Contact EnviroGroup for a consultation.
STATE 458	Error when recording the measuring signal	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 459	Error when recording the measuring signal for the insulation test	Contact EnviroGroup for a consultation.
STATE 460	Reference voltage source for the digital signal processor (DSP) is working out of tolerance	Contact EnviroGroup for a consultation.
STATE 461	Fault in the DSP data memory	Contact EnviroGroup for a consultation.
STATE 462	Error with DC feed monitoring routine	Contact EnviroGroup for a consultation.
STATE 463	Reversed AC polarity, AC connector inserted incorrectly	Contact EnviroGroup for a consultation.
STATE 472	Fuse for solar panel ground is faulty	Replace fuse for solar panel ground; If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 474	RCMU sensor faulty	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 475	Solar panel ground fault, insulation fault (connection between solar panel and ground)	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 476	Driver supply voltage too low	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 480, 481	One or more PC boards in the inverter are not compatible with each other	The inverter will automatically attempt to correct this error. Update the inverter firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 482	Startup incomplete	Turn the AC circuit breaker off and on. Complete start up.
STATE 483	Voltage UDC fixed on MPP2 string out of limits	Check the MPP settings. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 485	CAN transmit buffer is full	Turn the AC circuit breaker off and on. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 502	Insulation error on the solar panels	Push button on the inverter display. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 509	No energy fed into the grid in the past 24 hours	Push button on the inverter display. Look for any grid feed-in issues. Look out for further error messages.
STATE 515	No communication with filter possible	Push button on the inverter display. Look for any grid feed-in issues. Look out for further error messages.
STATE 516	No communication possible with the storage unit	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 517	Temperature highs cause power derating	Check vents, cooling, and heat sink. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 518	Internal DSP malfunction	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 519	No communication possible with the storage unit	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 520	No energy fed into the grid by MPPT1 in the past 24 hours	Push button on the inverter display. Look for any grid feed-in issues. Look out for further error messages.
STATE 522	DC1 Input Voltage too low	Check voltage & polarity on input 1 of the inverter. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 523	DC2 Input Voltage too low	Check voltage & polarity on input 2 of the inverter. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 551	Fuse for solar panel ground is faulty	Replace fuse for solar panel ground; If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 558, 559	One or more PC boards in the inverter are not compatible with each other	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 560	High grid frequency has caused derating.	The inverter will automatically attempt to correct this error once the frequency is within a normal range. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 564	One or more PC boards in the inverter are not compatible with each other	Update the inverter firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 566	Arc detector switched off (e.g. during external arc monitoring)	No error, Confirm status code by pressing ‘Enter’.
STATE 567	Grid Voltage Dependent Power Reduction is active (grid voltage has exceeded 250 Vac)	Acknowledge the error code. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 568	Incorrect input signal on the multifunction current interface	Acknowledge status code; check the devices connected to the multi-function current interface; If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 601	CAN bus is full	Update the inverter firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 603	AC module temperature sensor faulty (L3)	The inverter will automatically attempt to correct this error once the frequency is within a normal range. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 604	DC module temperature sensor faulty	The inverter will automatically attempt to correct this error once the frequency is within a normal range. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 607	RCMU error	Reset status code by pressing ‘Enter’. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 608	One or more PC boards in the inverter are not compatible with each other	Update the inverter firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 668	Incorrect input signal on the multi-function current interface	check the devices connected to the multi-function current interface; If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 701-716	Provides information about the internal processor status	If this code is consistently displayed, contact EnviroGroup for a consultation.
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	Acknowledge the error code. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 722-730	Provides information about the internal processor status	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 731	Initialisation error – USB stick is not supported	Check or replace USB stick. Check the file system on the USB stick. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 732	Over current on USB stick	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 733	No USB stick connected	Check the USB is connected. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 734	Update file not recognised or not present	Check update file (e.g. for correct file name). If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 735	Update file does not match the device, update file too old	Update the inverter firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 736	Write or read error occurred	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 this code is consistently displayed, contact EnviroGroup for a consultation
STATE 737	File could not be opened	Remove and then reinsert USB flash drive; check or replace USB flash drive
STATE 738	USB stick is write protected or full	Create storage space, remove write protection, check or replace USB stick if necessary. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 740	Initialisation error on USB flash drive	Check USB flash drive; reformat on PC for FAT12, FAT16 or FAT32.
STATE 741	Error during recording of logging data	Remove and then reinsert USB flash drive; check or replace USB flash drive
STATE 743	Error occurred during update process	Repeat the update process, check USB stick. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 745	Update file corrupt	Download the latest firmware. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 746	Error occurred during update process	Wait for 2 minutes, then start the update again. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 751	Time lost	Reset the time and date on the inverter. Check update file (e.g. for correct file name). If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 752	Real Time Clock module communication error	Reset the time and date on the inverter. Check update file (e.g. for correct file name). If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 754-755	Provides information about the processor status	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 757	Hardware error in the Real Time Clock module	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 758	Internal error: Real Time Clock module is in emergency mode	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 760	Internal hardware error	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 761-765	Provides information about the internal processor status	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 766	Emergency power de-rating has been activated	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 768	Different power limitation in the hardware modules	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 772	Storage unit not available	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 773	Software update error - invalid country setup	If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 775	PMC power stage set not available	Press ENTER key. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 776	Invalid device type	Press ENTER key. If this code is consistently displayed, contact EnviroGroup for a consultation.
STATE 781-794	Provides information about the internal processor status	If this code is consistently displayed, contact EnviroGroup for a consultation.

Sungrow

Error Display	Meaning	Solution
0002	The grid voltage exceeds inverter allowable upper limit.	Check the grid voltage and connection on the inverter. If the voltage is outside the tolerance range, ask your utility grid supplier for a solution. If the voltage is within the tolerance range and the error code remains, contact us for an inspection.
0003	Grid transient voltage exceeds the allowabel range	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
0004	The grid voltage is below inverter’s allowable lower limit.	Check the grid voltage and connection on the inverter. If the voltage is outside the tolerance range, ask your utility grid supplier for a solution. If the voltage is within the tolerance range and the error code remains, contact us for an inspection.
0005	The grid voltage is too low.	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
0006	The AC output current exceeds inverter allowable upper limit.	Wait for the current to fall below the protection value. If this code is consistently displayed, contact EnviroGroup for a consultation.
0007	Transient AC overcurrent	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
0008	The grid frequency exceeds inverter allowable upper limit.	Check the grid frequency and connection on the inverter. If the frequency is outside the tolerance range, ask your utility grid supplier for a solution. If the frequency is within the tolerance range and the error code remains, contact us for an inspection.
0009	The grid frequency is below the inverter allowable lower limit.	Check the grid frequency and connection on the inverter. If the frequency is outside the tolerance range, ask your utility grid supplier for a solution. If the frequency is within the tolerance range and the error code remains, contact us for an inspection.
0010	Islanding	Check whether AC circuit breaker is triggered. Check whether AC cables are all firmly connected. Check whether grid is not in service. If all conditions are OK and this fault still occurs in the LCD screen, contact EnviroGroup for a consultation
0011	The DC component of AC current exceeds inverter limit.	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
0012	A failure current is detected.	Call EnviroGroup to check your system for ground faults
0015	The grid voltage exceeds the permissible range	The inverter will automatically attempt to correct this error. Check the AC cable Check the grid frequency and connection on the inverter. If the voltage is outside the tolerance range, ask your utility grid supplier for a solution. If the voltage is within the tolerance range and the error code remains, contact us for an inspection.
0016	The bus voltage or power is high.	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
0020	The bus voltage is high.	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
0021	PV1 input overcurrent is detected	Contact EnviroGroup for a consultation.
0022	PV2 input overcurrent is detected	Contact EnviroGroup for a consultation.
0036	The temperature of radiator is too high.	Check whether the inverter operating ambient temperature is more than the range indicated in the specification. Check whether the AC output power exceeds the nominal power. If the fault still exists, please contact EnviroGroup.
0037	The internal temperature of inverter is too high	Check whether the inverter operating ambient temperature is more than the range indicated in the specification. Check whether the AC output power exceeds the nominal power. If the fault still exists, please contact EnviroGroup.
0038	Relay fault is detected	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
039	The insulation resistance is low. (ISO-flt)	Check whether the positive and negative of PV panels is short-circuited with ground lead. Wait a moment for inverter recovery. If the fault occurs repeatedly, contact EnviroGroup
041	Leakage current self-test abnormality	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
047	The PV configuration mode set in the phone application interface is not in accordance with the configuration in the connection cabinet.	Disconnect the inverter. Re-select PV configuration mode and re-connect PV strings. If the error persists, contact EnviroGroup for a consultation
048	Sampling channel failure	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
053	Auxiliary DSP detects grid voltage exceeds set protection value	Check the grid voltage and connection on the inverter. If the voltage is outside the tolerance range, ask your utility grid supplier for a solution. If the voltage is within the tolerance range and the error code remains, contact us for an inspection.
054	Auxiliary DSP detects grid frequency exceeds set protection value	Check the grid frequency and connection on the inverter. If the frequency is outside the tolerance range, ask your utility grid supplier for a solution. If the frequency is within the tolerance range and the error code remains, contact us for an inspection.
056	Auxiliary DSP detects grid leakage current exceeds set protection range	Contact EnviroGroup to check for a ground fault.
057	Auxiliary DSP AC current sampling channel anomaly	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
058	Auxiliary DSP detects AC current DC injection exceeds inverter set protection range	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
059	Main and auxiliary DSP communication anomaly	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
060	Main and auxiliary DSP sampling difference	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation.
070	Fans are defective	Stop the inverter Disconnect the AC and DC cables Check the fan duct and fans If this code is consistently displayed, contact EnviroGroup for a consultation.
087	Arc self-detection anomaly warn	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation
088	Arc anomaly fault	Stop the inverter Disconnect the AC and DC cables Check the cables If this code is consistently displayed, contact EnviroGroup for a consultation
089	Arc detection OFF warn	Remove the warning by enabling arc detection function or keep the warning by closing arc detection function.
100	The AC output current exceeds inverter protection limit.	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation
101	The grid frequency exceeds inverter allowable upper limit.	Check the grid frequency and connection on the inverter. If the frequency is outside the tolerance range, ask your utility grid supplier for a solution. If the frequency is within the tolerance range and the error code remains, contact us for an inspection.
102	The grid frequency is below the inverter allowable lower limit.	Check the grid frequency and connection on the inverter. If the frequency is outside the tolerance range, ask your utility grid supplier for a solution. If the frequency is within the tolerance range and the error code remains, contact us for an inspection.
106	The inverter is not grounded	Call EnviroGroup to check your system for ground faults
200	The bus voltage is high.	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation
201	The bus voltage is too low.	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation
202	PV current overcurrent	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation
205	AC output replay abnormal	The inverter will automatically attempt to correct this error. If this code is consistently displayed, contact EnviroGroup for a consultation
307	DC power is too high	Contact EnviroGroup for a consultation