Inverter Error Code Glossary Pakistan Master Index by Brand

Updated 2 August 2026 · By SolarNevs Research Desk, Dealer surveys + verified sources · 20 sources · Method ↗

Solar inverter error code master index by brand — SolarNevs spec card

Inverter Error Code Glossary Pakistan Master Index by Brand

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Key Takeaways

  • Inverters sold in Pakistan speak three unrelated code languages, and a number alone means nothing until you know which one your unit uses.
  • Code 58 is an AC output current condition on Voltronic-style firmware and a battery BMS communication fault on Deye-style firmware, which are completely different repairs.
  • Three Deye-family codes mean stop rather than reset. F08 is a GFDI relay failure, F24 is a DC insulation impedance failure, and F63 is an arc fault flagged as a fire risk.
  • Inverex Nitrox displays a Deye-style F01 to F64 set, while Axpert-derived Inverex lines display two-digit numbers, so two inverters from one brand need two different tables.
  • Every code in this index routes to a repair path, and the repair-versus-replace ceiling is 40 to 50 percent of a new unit at your written local quote (checked July 2026).

How do you work out which code language your inverter speaks?

Before reading any code table, identify the format on your screen. This one step prevents most of the wrong repairs in this market.

Code family

Format on screen

Lines commonly seen in Pakistan

Where the code appears

Voltronic-style

Two digits, such as 01, 05, 51, 58

Growatt SPF off-grid and hybrid, Axpert-derived Inverex lines, SolarMax, Fronus and other locally badged off-grid units

LCD panel and the brand app

Deye-style

F prefix, F01 through F64

Deye hybrids and Inverex Nitrox

Colour touchscreen and Solarman

Solis

Four digits plus a mnemonic, such as 1010 OV-G-V

Solis grid-tied and hybrid units by Ginlong

LCD panel and SolisCloud

Two rules follow. A code list that does not name the firmware family is worth nothing, so ignore any forward that gives you "error 58" without saying which inverter it came from. And a brand is not a family, because Inverex ships both Deye-style and two-digit units.

What do the two-digit Voltronic-style codes mean?

These definitions come from the Voltronic Axpert fault reference tables, and apply across locally badged units using the same numbering.

Code

Manual definition

First move

Where it usually lives

01

Fan is locked or fan failed

Power down, inspect the fan grille

Outside the box

02

Over temperature, inverter part above 100°C or DC/DC part above 75°C

Check clearances, shade, and vent dust

Outside the box

03

Battery voltage too high, above 63V while AC charging

Check charger settings against the bank

Settings

05

Output short circuited, INV voltage below 50V RMS or current above 20A RMS

Isolate circuits one at a time

House wiring or an appliance

07

Overload time out, 110 percent for 10s or 150 percent for 5s

Stagger the heavy loads

Your load profile

08

Bus voltage too high, over 500V for 1s

Workshop diagnosis

Inside the box

51

Over current, internal components failed

Workshop diagnosis

Inside the box

52

Bus voltage too low, below 260V

Battery bank, lugs and cable gauge first

Battery side

55

Over DC voltage in AC output, above 400mV for 20s

Workshop diagnosis

Inside the box

56

DC voltage low

Battery bank and connections

Battery side

58

AC output current condition, appears when a heavy or high-impedance load is connected

Reduce load, then inspect the output stage

Load, then the box

Codes 08, 51 and 55 belong on a bench. Everything else here starts with a check that needs no opening of the case.

What do the Deye-style F codes mean?

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Code

Meaning

Urgency

F08

GFDI relay failure, ground-fault protection

Stop, call a professional

F13

Working or grid mode changed

Usually self-clears

F18

AC overcurrent fault, hardware

Check and restart

F20

DC overcurrent fault, hardware

Check and restart

F22

Emergency-stop fault

Stop, call a professional

F23

AC leakage current, transient overcurrent

Usually self-clears

F24

DC insulation impedance failure

Stop, call a professional

F26

DC busbar unbalanced

Check and restart

F29

Parallel CAN-bus fault

Check and restart

F34

AC overcurrent fault

Check and restart

F35

No AC grid detected

Usually self-clears

F41

Parallel system stop

Usually self-clears

F42

AC line low voltage

Usually self-clears

F46

Battery defect

Check and restart

F47

AC over frequency

Usually self-clears

F48

AC under frequency

Usually self-clears

F55

DC bus voltage too high

Check and restart

F56

DC busbar voltage too low

Check and restart

F58

Battery BMS communication fault

Check and restart

F60

Battery over or under voltage, BMS protection

Stop, call a professional

F61

Battery overcurrent, BMS protection

Stop, call a professional

F62

Battery BMS stopped charge or discharge

Stop, call a professional

F63

Arc fault detected by AFCI, fire risk

Stop, call a professional

F64

Heat sink high temperature

Check and restart

Compare 56 and 58 across the families. On Voltronic-style firmware, 56 is a low DC voltage condition and 58 is an AC output condition. On Deye-style firmware, F56 is a low DC busbar voltage and F58 is a battery communication failure. A technician reading the wrong table replaces the wrong thing, and you pay for it.

What do the Solis four-digit codes mean?

Solis units by Ginlong pair a four-digit number with a short mnemonic. Memorise the mnemonic, since that is what appears on the screen and in SolisCloud.

Code

Mnemonic

Meaning

Urgency

1010

OV-G-V

Grid overvoltage

Usually self-clears

1011

UN-G-V

Grid undervoltage

Usually self-clears

1012

OV-G-F

Grid over frequency

Usually self-clears

1013

UN-G-F

Grid under frequency

Usually self-clears

1015

NO-Grid

No grid detected

Usually self-clears

1016

G-PHASE

Unbalanced three-phase grid

Check and restart

1020

OV-DC

DC overvoltage

Stop, call a professional

1023

UN-BUS

DC bus voltage too low

Check and restart

1027

DC-INTF

Abnormal DC input current

Check and restart

1028

Reve-DC

DC reversely connected

Stop, call a professional

1030

GRID-INTF

Grid interference

Check and restart

1032

OV-TEM

Over temperature

Check and restart

1033

PV-ISO-PRO

Low PV insulation or ground fault

Stop, call a professional

1034

ILeak-PRO

Leakage current protection

Check and restart

1035

RelayChk-FAIL

Relay self-check failure

Check and restart

1041

ARC-FAULT

DC arc fault, fire risk

Stop, call a professional

One correction is worth making in public. Several circulated Solis lists put isolation faults in a 2000 series and control faults in a 3000 series. Ginlong's own service portal and the indexed alarm list both place insulation protection at 1033 and arc fault at 1041, with no 2000 or 3000 series (checked 26 July 2026). If your screen shows a code outside the 1010 to 1041 band, check model and firmware before acting on any table.

Grid overvoltage is the alarm Pakistani net-metered households see most, because afternoon feed-in on a weak feeder pushes line voltage up. Ginlong's official steps for 1010 run from AC cable connectivity and gland polarity, to grid standard selection, to cable size against Solis limits, since line impedance produces the same symptom. It is a cabling problem before it is an inverter problem.

Which codes mean stop rather than reset?

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Four situations end the session. A ground-fault code such as Deye F08, an insulation code such as Deye F24 or Solis 1033 PV-ISO-PRO, an arc-fault code such as Deye F63 or Solis 1041 ARC-FAULT, and any burning smell, crackle or hiss whatever the screen says.

These are not nuisance alarms. They report leakage to earth, degraded insulation and arcing, the conditions that precede a rooftop fire. Resetting them clears the message and leaves the fault. The full framework, including what to do in the first minute after you smell burning, is in when to call a solar technician.

Which brand database or symptom guide should you open next?

Brand or line

Code family

Guide

Growatt

Voltronic-style two-digit

Growatt error codes

Solis

Four-digit

Solis error codes including 1010

Inverex Nitrox

Deye-style F codes

Inverex Nitrox error codes

SolarMax

Voltronic-style two-digit

SolarMax error codes

Fronus

Voltronic-style two-digit

Fronus error codes

Knox and Deye

Deye-style F codes

Database in preparation

Huawei

Brand-specific alarm IDs

Database in preparation

GoodWe

Brand-specific alarm IDs

Database in preparation

Crown

Voltronic-style two-digit

Database in preparation

Sorotec

Voltronic-style two-digit

Database in preparation

Symptom-first guides are being added here as they publish, for cases where the screen shows nothing useful. They cover an error with no output, continuous beeping, batteries that will not charge from solar, overload and OP codes, earth-fault and leakage errors, grid overvoltage above 250V, monitoring setup, summer overheating, tripping during the load-shedding transition, and lithium BMS protocol mismatches.

What will the fix cost and who should carry it out?

The code tells you where the fault lives, so anything outside the box (fan, load, battery cabling, grid voltage) gets checked before anyone quotes for a board. The ceiling on a repair quote is 40 to 50 percent of what your model costs new, measured against a written local quote rather than a price page (checked July 2026). A generic local four-IGBT driver PCB sells over the counter in Lahore for Rs 860 (July 2026), which tells you how much of a five-figure board quote is labour and margin. The full breakdown, including what warranty cover survives an unauthorised repair, is in the inverter repair cost guide. If the code appeared after a generator was added, start with generator and hybrid inverter wiring problems, because many AC-side codes on Pakistani installs are a genset settings issue rather than a fault.

Frequently Asked Questions

Why does the same error code mean different things on different inverters?

Pakistani inverters run three unrelated code sets. Voltronic-style two-digit numbers, Deye-style F01 to F64, and Solis four-digit numbers. Fault 58 is an AC output condition on one and a BMS communication fault on another.

Which inverter error codes should never be reset and ignored?

Ground-fault, insulation and arc-fault codes. On Deye-style firmware these are F08, F24 and F63. They report the conditions that precede a roof fire, so the system should be left off.

How do I know which code family my inverter uses?

Look at the code format. Two digits means Voltronic-style firmware, an F prefix up to F64 means Deye-style, and four digits starting at 1010 means Solis. Match the family before reading any table.

References

Frequently asked questions

Why does the same error code mean different things on different inverters?

Pakistani inverters run three unrelated code sets. Voltronic-style two-digit numbers, Deye-style F01 to F64, and Solis four-digit numbers. Fault 58 is an AC output condition on one and a BMS communication fault on another.

Which inverter error codes should never be reset and ignored?

Ground-fault, insulation and arc-fault codes. On Deye-style firmware these are F08, F24 and F63. They report the conditions that precede a roof fire, so the system should be left off.

How do I know which code family my inverter uses?

Look at the code format. Two digits means Voltronic-style firmware, an F prefix up to F64 means Deye-style, and four digits starting at 1010 means Solis. Match the family before reading any table.

References

Related guides

More from inverter errors & fixes.