Error codes Growatt MIN/MOD/MID - full index of Warning and Error from the manual
Error codes Growatt MIN, MOD and series MID read after the first digit: 2xx = PV side, 3xx = AC network, 4xx = internal systems, 6xx–7xx = off-grid and backup, and the number with brackets, e.g. 506(3), indicates the battery circuit. Warning = warning during operation, Error = disconnection; standard: one restart, notification on reversal.
Error codes Growatt in the MIN, MOD and MID They share a common three-digit numbering and a common logic that, when understood, simplifies any diagnostics: the first digit tells you where to look for the cause, and the Warning/Error distinction tells you whether the inverter is still running or has already tripped. This page is a complete index of error codes. Growatt collected from MOD TL3-XH instructions (rev. 202405), common for twin tables MID and—in three-digit numbering—single-phase MIN. We'll leave the descriptions as they are (as displayed by the equipment and monitoring), and the area column tells you where to look in Polish. If you arrived here with a specific number on the screen, jump straight to the maps below; if you want to understand the system, start with the section on hundreds and brackets.
How to read error codes Growatt — hundreds and brackets
Error codes Growatt are arranged in a two-dimensional system. The first dimension: the type of message. Warning is a warning - the inverter signals a deviation, usually continuing operation; Error is a fault - the unit goes into error mode and the standard procedure is to restart it, and in case of repetition, contact the service. The second dimension: the first digit of the code. The 200s refer to the PV side and the DC input, the 300s - to the AC network (and overloads). off-grid), four hundred — internal circuits of the inverter, six hundred — outputs off-grid, seven hundred - backup track. Codes with a suffix in brackets, e.g. 411(5) or 506(2), come from separate battery tables and indicate the system BMS/power module, not for inverter.
The practical minimum, before you look at the tables: you can read the code on the OLED screen (the Fault code item is in the Battery Info section, and the model and serial number are in About) and in the monitoring app. For a service request, gather the complete manufacturer's checklist: SN, model, exact message, AC and DC voltages, repeatability, and conditions.
| Range | System area | Typical examples | Where to start |
|---|---|---|---|
| 2xx | PV / DC side | 202 PV voltage over threshold, 203 isolation, 204 reverse string | DC disconnector, string measurements, grounding |
| 3xx | AC network / off-grid | 300 grid voltage, 302 grid failure, 309 ROCOF, 311 export limit fail-safe | voltage measurement, N/PE wiring - full procedure in the article about Error 300 |
| 4xx | internal systems | 405 relay, 408 temperature, 411 internal communication | restart; repeat = service, not subsequent restarts |
| 6xx–7xx | off-grid and backup box | 607 overload off-grid, 701 backup box relay | EPS output load, cabling and communication SYN |
| NNN(x) | battery: BMS / power module | 411(5) BM communication, 506(3) reverse power cables | cables and pairing BMS — guide in a separate entry |
What purpose does this index serve in daily work? First, as the first line of telephone qualification: the customer reads the number, and you know in ten seconds whether to pack a meter, an RS485 cable, or battery track components. Second, as a dictionary for monitoring—error codes. Growatt In the application, they are displayed exactly as they appear in the tables below, so the original description column allows you to clearly pair the request with the instruction line. Third, as a cross-reference map: the most common items have full procedure articles in our knowledge base, and the index tells you which one is which. We update the page as the instructions are revised—you can find the revision date in the article footer.
Full Warning Map - MIN/MOD/MID
Warning error codes Growatt They have a common procedure: check the indicated element, restart, and if the message persists, contact service. Error codes Growatt with brackets in this table are battery warnings from section 12.1.2.
| Code | Description (original from the manual) | Distance |
|---|---|---|
| Warning 200 | PV string fault | PV / DC side |
| Warning 201 | PV string/PID quick-connect terminals abnormal | PV / DC side |
| Warning 203 | Pv1 or PV2 short circuited | PV / DC side |
| Warning 204 | Dry contact function abnormal | PV / DC side |
| Warning 205 | PV boost driver abnormal | PV / DC side |
| Warning 206 | AC SPD function abnormal | PV / DC side |
| Warning 207 | USB flash drive overcurrent protection | PV / DC side |
| Warning 208 | DC fuse blown | PV / DC side |
| Warning 209 | DC input voltage exceeds the upper threshold | PV / DC side |
| Warning 210 | PV wiring abnormal | PV / DC side |
| Warning 217 | BDC abnormal | PV / DC side |
| Warning 218 | BDC Bus disconnected | PV / DC side |
| Warning 219 | PID function abnormal | PV / DC side |
| Warning 220 | PV string disconnected | PV / DC side |
| Warning 221 | PV string current unbalanced | PV / DC side |
| Warning 300 | No utility grid connected or utility grid power failure | AC network / work off-grid |
| Warning 301 | Grid voltage is beyond the permissible range | AC network / work off-grid |
| Warning 302 | Grid frequency is beyond the permissible range | AC network / work off-grid |
| Warning 303 | Off-grid mode, overload | AC network / work off-grid |
| Warning 406 | Boost circuit | internal systems |
| Warning 408 | NTC temperature sensor is broken | internal systems |
| Warning 409 | Reactive power scheduling communication failure | internal systems |
| Warning 601 | DC component excessively high in output voltage | Exit off-grid |
| Warning 602 | Off-grid output voltage too low | Exit off-grid |
| Warning 603 | Off-grid output voltage too high | Exit off-grid |
| Warning 604 | Off-grid output overcurrent | Exit off-grid |
| Warning 606 | Off-grid output overloaded | Exit off-grid |
| Warning 404(0) | Abnormal EEPROM | internal systems (battery) |
| Warning 410(0) | abnormal external oscillation | internal systems (battery) |
| Warning 410(1) | Oscillation abnormal | internal systems (battery) |
| Warning 410(2) | USB communication abnormal | internal systems (battery) |
| Warning 411(6) | communication failed Parallel | internal systems (battery) |
| Warning 417(2) | BM and PM software version mismatched | internal systems (battery) |
| Warning 431(0) | BOOT abnormal | internal systems (battery) |
| Warning 500(0) | during parallel Abnormal CAN operation communication | BMS / battery power module (battery) |
| Warning 500(9) | Abnormal communication with PM | BMS / battery power module (battery) |
| Warning 704(0) | overvoltage PM to INV | backup box / battery track (battery) |
| Warning 705(0) | overvoltage PM to INV | backup box / battery track (battery) |
| Warning 707(0) | Discharge Overload Alarm | backup box / battery track (battery) |
Error codes Growatt Error class - inverter and battery
Error disconnects the unit—this is a more serious class of messages. For a series of internal codes, the instruction repeats a single rule: restart, and upon reversal—report. The lines in parentheses are the battery fault table 12.2.2.
| Code | Description (original from the manual) | Distance |
|---|---|---|
| Error 200 | DC arc fault has been detected | PV / DC side |
| Error 201 | An excessively high leakage current has been detected | PV / DC side |
| Error 202 | PV input voltage exceeds the upper threshold | PV / DC side |
| Error 203 | V panels have low insulation resistance | PV / DC side |
| Error 204 | PV string reversely connected | PV / DC side |
| Error 300 | Grid voltage is beyond the permissible range | AC network / work off-grid |
| Error 301 | AC terminals reversed | AC network / work off-grid |
| Error 302 | No utility grid connected or utility grid power failure | AC network / work off-grid |
| Error 305 | Overload | AC network / work off-grid |
| Error 309 | ROCOF Fault | AC network / work off-grid |
| Error 311 | Export limitation fail-safe | AC network / work off-grid |
| Error 401 | High DC component in output voltage | internal systems |
| Error 402 | High DC component in output current | internal systems |
| Error 403 | Output current unbalanced | internal systems |
| Error 404 | Bus voltage sampling abnormal | internal systems |
| Error 405 | Relay fault | internal systems |
| Error 407 | Self-test failed | internal systems |
| Error 408 | Over-temperature | internal systems |
| Error 409 | Bus voltage abnormal | internal systems |
| Error 411 | Internal communication failure | internal systems |
| Error 416 | DC/AC overcurrent protection | internal systems |
| Error 420 | GFCI module abnormal | internal systems |
| Error 424 | INV current waveform abnormal | internal systems |
| Error 425 | AFCI self-test failure | internal systems |
| Error 426 | PV current sampling abnormal | internal systems |
| Error 427 | AC current sampling abnormal | internal systems |
| Error 428 | BOOST short-circuited | internal systems |
| Error 429 | BUS soft start failed | internal systems |
| Error 600 | Off-grid output short-circuited | Exit off-grid |
| Error 601 | Off-grid Bus Volt Low | Exit off-grid |
| Error 602 | Abnormal Volt at the off-grid terminal | Exit off-grid |
| Error 604 | Off-grid output voltage abnormal | Exit off-grid |
| Error 605 | Balanced circuit self-test failed | Exit off-grid |
| Error 606 | High DC component in output voltage | Exit off-grid |
| Error 607 | Off-grid output overload | Exit off-grid |
| Error 700 | Abnormal communication between the backup box and the inverter | backup box / battery track |
| Error 701 | Backup box grid-side relay failure | backup box / battery track |
| Error 703 | Backup box on-grid overload | backup box / battery track |
| Error 705 | Overheat inside the backup box | backup box / battery track |
| Error 404(0) | BM to PM undervoltage | internal systems (battery) |
| Error 406(0) | transient BM to PM overvoltage | internal systems (battery) |
| Error 408(0) | Over Temp | internal systems (battery) |
| Error 409(2) | PM is INV transient overvoltage | internal systems (battery) |
| Error 411(2) | communication with INV Abnormal | internal systems (battery) |
| Error 411(5) | with BM Abnormal communication | internal systems (battery) |
| Error 416(2) | Transient overcurrent | internal systems (battery) |
| Error 416(4) | overcurrent BM to PM | internal systems (battery) |
| Error 417(0) | Mismatched MODEL of software/hardware | internal systems (battery) |
| Error 419(5) | hardware/software version Inconsistent | internal systems (battery) |
| Error 505(0) | PM to INV voltage calibration failed | BMS / battery power module (battery) |
| Error 506(1) | PM circuit breaker open-circuited | BMS / battery power module (battery) |
| Error 506(2) | PM fuse open circuited | BMS / battery power module (battery) |
| Error 506(3) | PM to INV short circuited (power cables reversed) | BMS / battery power module (battery) |
| Error 508(3) | overvoltage Transient | BMS / battery power module (battery) |
| Error 603(0) | soft start failed PM to INV voltage | Exit off-grid (battery) |
| Error 700(0) | open-circuited Temperature sensor | backup box / battery track (battery) |
MIN vs. MOD/MID — where the numbering matches and where it doesn't
Single-phase MIN TL-X use the same three-digit logic, but their Polish manual describes a narrower subset—and a few specific items. Common with MOD/MID include network 300/302/304, PV 202/203 and internal 405/408/409/411. MIN specific: Error 303 defined as N-PE voltage above 30 V (in MOD/MID three hundred with this number does not occur, but 303 as Warning means overload off-grid) and Error 414 for EEPROM memory. Warning 401 about communication with the counter in MOD/MID equivalent to Error 311 at the limit function level.
Orderly motion: error codes Growatt is always read as a pair "number + series." The same number in two families can mean different things - that's why the index has an area column, and when diagnosing by phone, the first question is "what model?", not "what code?" - error codes Growatt without the context of the series it is not enough to decide anything.
Error codes Growattwhich come back most often - where do they lead
Eight index items deserve to be expanded on, because they are where error codes are placed. Growatt entered into the search engine in the evenings. Error 300 / Warning 301 (grid voltage) is statistically the number one problem of Polish installations - full diagnostics with two-point measurement and the reporting path to the DSO are described in a dedicated article on high grid voltage. Error 311 means the export limit system loses measurement - the first step is to connect the CT and the meter, and the entire configuration is covered in the article about export limit. Error 202 tells you to immediately disconnect the DC and measure the string voltage - this is a design error in the string selection, not a defect. Error 203 (insulation) in Polish instructions MIN has the most specific procedure: earthing, dry disconnector and PV± impedance to earth above 25 kΩ, and according to VDE0126 — 500 kΩ.
Warning 401 na MIN this is a broken communication with the meter - check the power supply and connection. Error 408 (temperature) requires checking the airflow and restarting after cooling; the Polish manual specifies restarting at an ambient temperature below 60°C. Warning 303 / Error 305–307 in the family off-grid is an emergency exit overload - the cure is to reduce the EPS load. 5xx codes with brackets — headed by 506(3), i.e. inverted power cables between the PM module and the inverter — they lead to the battery track; there the pairing logic applies BMS from our guide.
What NOT to do when getting error codes
- Do not diagnose from memory of other series numbering - error codes Growatt in the family WIT have their own tables (described in a separate article), and older generations have different ones; always read the table in your unit's manual.
- Do not restart in a loop - the procedure says: ONE restart, and in case of relapse, report; the tenth restart will not repair the relay, but will blur the image of the fault.
- Don't ignore the brackets in the code - 411 and 411(5) are two different faults on two different devices.
- Do not work with Error 202 "because the sun will go down soon" - the instructions tell you to disconnect the DC immediately; exceeded string voltage is a real threat.
- Do not report "inverter shows error" - without the number, SN and circumstances, the report will be returned with questions instead of a solution.
- Don't confuse Error 301 (AC terminals reversed) with voltage problems - it's an installation error.
From the installer's practice
Four service habits around codes – practical tips, not manufacturer requirements.
- From practice: print this map and leave it at the distribution center - a customer dictating "Error 411 with a five" on the phone saves you a reconnaissance trip.
- From practice: with 3xx codes, always ask about the time of occurrence - "noon on a sunny day" almost determines the network voltage before you even take the meter out of the service bag.
- From practice: attach a screenshot of the application with a visible code and time to each report - the timestamp is sometimes more important than the number itself, as it allows the service to look at the logs from the correct moment.
- From practice: after eliminating the cause, record the code and repair in the object card - the third repetition of the same number in the card is a strong argument for replacing the component - but only if you keep this history from the first occurrence.
FAQ - Frequently Asked Questions about Error Codes Growatt
Where are the error codes Growatt can you see the fastest?
On the unit's OLED display (the section with the Fault code entry) and in the monitoring application—provided the datalogger has good connectivity. In practice, monitoring wins because it also displays a history of occurrences with hours, which the device screen doesn't.
What is the difference between Warning and Error?
Warning is a deviation at which the unit normally continues to operate; Error is a fault with a disconnection and error mode. The procedures in the tables differ accordingly: warnings are more likely to indicate an item to check, errors are more likely to indicate restart and escalation.
Do these codes also apply to my inverter? WIT or SPF?
Indirectly. Family WIT has its own tables (our separate index), series SPF — its own numbering described in the service article. The only common features are the Warning/Error logic and the principle of reading the codes from the manual for your specific unit.
What does a code that is not in this table mean?
The table reflects the MOD revision 202405 manual—newer firmware can add codes that the older version doesn't describe. In such a situation, check the manufacturer's download center for the latest manual revision, and if there's no entry, report the code to support with the complete data; we don't guess meanings that the document doesn't provide.
Error codes Growatt appear and disappear - report?
Always note and report according to the recurrence rule: a one-time episode after a transient state is an observation, a code that returns after a restart is a report. The history of occurrences with dates is half the value of the report; the other half is the exact code number with parentheses.
Checklist: From Code to Solution
- FULL code read - with brackets if present.
- Identified area after the first digit (range table above).
- Table checks performed for this code.
- One restart; result recorded.
- For codes 3xx: voltage measurement and procedure from the article on high network voltage.
- For battery codes: Cable and pairing verification BMS.
- Screenshot with code and time preserved in the facility documentation.
- In case of relapse: report with SN, model, code, voltages and history.
Remote diagnostics is most quickly achieved through efficient monitoring – codes can be seen in the application without climbing a ladder; the module Growatt ShineWiLan-X2 adds version and server preview, and the remaining dataloggers can be found in the category Communication and monitoringThe latest revisions of the manual with code tables are published download center Growatt.