What is the difference between a fault and a warning on the SUN G03/G01P3-AM8 Series?

A fault cuts the unit's output and the red LED stays solid — this page lists 64 of them for the SUN G03/G01P3-AM8 Series. A warning only flashes the red LED and the unit keeps running; there are 4 warning codes here. Resolve the cause of a fault before restarting; warnings can usually be cleared while the unit runs.

Where do these codes come from?

Every entry was transcribed from 033_BManual_SUN-70_75_80_90_100_110K-G03_20260702_en_a9db1e1b.pdf, 042_BManual_SUN-120_125_130_135_136K-G01P3-EU-AM8_20260702_en_05f936e3.pdf, 060_BManual_SUN-60_70_75K-G01P3-EU-AM8-LV_20260701_en_f559aeec.pdf, 067_BManual_SUN-60_70_75_80K-G03_20260309_en_a0739b4b.pdf — DEYE's official documentation. Each row cites its source manual (and page where printed), so you can verify the wording before acting on it.

DEYE SUN G03/G01P3-AM8 Series Error Codes: Causes & Fixes (68 codes)

This is the complete fault table for the DEYE SUN G03/G01P3-AM8 Series Inverter family — 68 codes shared by 15 model numbers, transcribed from the official manual. On DEYE units, a fault code means the unit has cut its output and the red LED stays solid; a warning flashes the red LED while the unit keeps running.

Also coversSUN-60K-G03SUN-70K-G03SUN-75K-G03SUN-80K-G03SUN-90K-G03SUN-100K-G03SUN-110K-G03SUN-60K-G01P3-EU-AM8-LVSUN-70K-G01P3-EU-AM8-LVSUN-75K-G01P3-EU-AM8-LVSUN-120K-G01P3-EU-AM8SUN-125K-G01P3-EU-AM8SUN-130K-G01P3-EU-AM8SUN-135K-G01P3-EU-AM8SUN-136K-G01P3-EU-AM8

Last checked against the official manuals on July 11, 2026.

Fault(64)— output stops · red LED solid
Warning(4)— unit keeps running · red LED flashing

Fault codes (64)output stops · red LED solid

F01

DC input polarity reverse fault.

Fault

The DC input from the PV strings is connected with reversed polarity.

CauseThe plus and minus conductors of a PV string are swapped at the inverter's DC input, so the inverter sees reverse polarity.

Recommended fixCheck the PV input polarity.

Source:033_BManual_SUN-70_75_80_90_100_110K-G03_20260702_en_a9db1e1b.pdf· page 60042_BManual_SUN-120_125_130_135_136K-G01P3-EU-AM8_20260702_en_05f936e3.pdf· page 60060_BManual_SUN-60_70_75K-G01P3-EU-AM8-LV_20260701_en_f559aeec.pdf· page 60067_BManual_SUN-60_70_75_80K-G03_20260309_en_a0739b4b.pdf· page 60

F02

DC insulation impedance permanent fault.

Fault

The insulation impedance between the DC (PV) side and ground is permanently below the protection limit.

CauseA defective or missing inverter ground connection, or degraded DC-side insulation, keeps the measured insulation impedance to ground below the limit.

Recommended fixCheck the grounding cable of the inverter.

F03

DC leakage current fault.

Fault

Leakage current on the DC side exceeds the protection limit.

CauseLeakage current from the DC side to ground exceeds the protection threshold, typically caused by damaged PV cable or module insulation.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F04

Ground fault GFDI.

Fault

The ground-fault detector/interrupter (GFDI) has detected a ground fault on the PV side.

CauseA PV output conductor is faulted to ground, tripping the GFDI protection.

Recommended fixCheck the solar panel output connection.

F05

Read the memory error.

Fault

Failure in reading the internal memory (EEPROM).

CauseThe controller failed to read stored data from the EEPROM memory chip.

Recommended fixRestart the inverter; if the fault still exists, contact your installer.

F06

Write the memory error.

Fault

Failure in writing the internal memory (EEPROM).

CauseThe controller failed to write data to the EEPROM memory chip.

Recommended fixRestart the inverter; if the fault still exists, contact your installer.

F07

GFDI blown fuse.

Fault

The GFDI protection fuse has blown.

CauseThe ground-fault detector/interrupter fuse has blown, which points to a ground-fault current having flowed on the PV side.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F08

GFDI grounding touch failure.

Fault

The GFDI circuit reports a failed grounding contact.

CauseThe GFDI circuit detected a failed ground contact, so the ground-fault protection path is not intact.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F09

IGBT damaged by excessive drop voltage.

Fault

An IGBT power switch shows an excessive voltage drop.

CauseAn IGBT power switch exhibits an excessive on-state voltage drop, indicating the switch has been damaged.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F10

Auxiliary switch power supply failure.

Fault

The internal auxiliary switching power supply has failed; the DC 12 V rail is missing.

CauseThe internal DC 12 V auxiliary supply is not present (the manual: 'It tells the DC 12V is not existed').

Recommended fixRestart the inverter; if the fault still exists, please contact your installer.

F11

AC main contactor errors.

Fault

The main AC contactor did not operate correctly.

CauseThe main AC contactor failed to switch as commanded or returned an implausible feedback state.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F12

AC auxiliary contactor errors.

Fault

The auxiliary AC contactor did not operate correctly.

CauseThe auxiliary AC contactor failed to switch as commanded or returned an implausible feedback state.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F13

Reserved.

Fault

Reserved code; in practice it is raised when a grid phase is lost or the AC voltage detection/relays do not close.

CauseLoss of one grid phase, a failure in the AC voltage detection part, or relays that did not close.

Recommended fixRestart the inverter; if the error still exists, contact your installer.

F14

DC firmware over current.

Fault

Firmware-level DC over-current protection tripped.

CauseThe DC input current exceeded the firmware (software) over-current limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F15

AC firmware over current.

Fault

Firmware-level AC over-current protection tripped.

CauseThe AC output current exceeded the firmware limit; the internal AC sensor, its detection circuit on the control board, or a connection wire may be loose.

Recommended fix1. Check the internal AC sensor, its detection circuit on the control board and the connection wiring. 2. Restart the inverter; if the error still exists, contact your installer.

F16

GFCI(RCD) Ac leakage current fault.

Fault

The GFCI/RCD stage measured an average AC leakage current above 300 mA.

CauseThe average AC leakage current measured by the GFCI/RCD stage exceeds 300 mA, from a real leakage path on the DC supply or solar panels or from a faulty leakage current sensor or its circuit.

Recommended fix1. Check whether the DC power supply and the solar panels are OK, then check that the 'Test data' -> 'diL' value is about 40, then check the leakage current sensor and its circuit (viewing test data requires the big LCD). 2. Restart the inverter; if the error still exists, contact your installer.

F17

Three phase current, over-current fault.

Fault

The three-phase output current exceeded the over-current protection limit.

CauseThe summed three-phase output current exceeded the over-current protection limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F18

AC over current fault of hardware.

Fault

Hardware-level AC over-current protection tripped.

CauseThe AC output current exceeded the hardware protection limit; the AC sensor or its detection circuit on the control board, or the connection wiring, may be faulty.

Recommended fix1. Check the AC sensor and its detection circuit on the control board and the connection wiring. 2. Restart the inverter or perform a factory reset; if the error still exists, contact your installer.

F19

All hardware failure synthesis.

Fault

Aggregate flag raised when hardware protection faults occur in combination.

CauseSeveral hardware protection signals tripped together; the inverter raises this synthesized (aggregate) hardware-failure flag.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F20

DC over current fault of the hardware.

Fault

Hardware-level DC over-current protection tripped.

CauseThe DC input current exceeded the hardware protection limit: solar panel output current above the allowed range, a DC current sensor or detection-circuit fault, or firmware that does not match the hardware.

Recommended fix1. Check whether the solar panel output current is within the allowed range. 2. Check the DC current sensor and its detection circuit. 3. Check that the inverter firmware version is suitable for the hardware. 4. Restart the inverter; if the error still exists, contact your installer.

F21

DC leakage flow fault.

Fault

Leakage current in the DC circuit exceeded the protection threshold.

CauseLeakage current in the DC circuit exceeded the protection threshold.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

Source:033_BManual_SUN-70_75_80_90_100_110K-G03_20260702_en_a9db1e1b.pdf· page 62042_BManual_SUN-120_125_130_135_136K-G01P3-EU-AM8_20260702_en_05f936e3.pdf· page 61060_BManual_SUN-60_70_75K-G01P3-EU-AM8-LV_20260701_en_f559aeec.pdf· page 61067_BManual_SUN-60_70_75_80K-G03_20260309_en_a0739b4b.pdf· page 61

F22

Crash stop (if there is a stop button).

Fault

The inverter performed a crash (emergency) stop.

CauseThe external stop button (where fitted) was activated, forcing the inverter to stop immediately.

Recommended fixContact your installer for help.

F23

AC leakage current is transient over current.

Fault

The AC leakage current rose above 30 mA suddenly.

CauseThe leakage current jumped above 30 mA suddenly, from a real transient leakage path on the DC supply or solar panels or from a faulty leakage current sensor or its circuit.

Recommended fix1. Check whether the DC power supply and the solar panels are OK, then check that the 'Test data' -> 'diL' value is about 40, then check the leakage current sensor and its circuit (checking test data requires the big LCD). 2. Restart the inverter; if the fault still exists, contact your installer.

F24

DC insulation impedance failure.

Fault

The PV-array-to-ground insulation impedance is too low.

CauseThe insulation impedance between the PV array and ground is too low: often a PV panel problem, poor grounding of the PV panel frames or of the inverter, or an AC/DC cable or terminal block shorted to ground or with damaged insulation.

Recommended fix1. Check the Vpe resistance on the main board and its detection on the control board, and check that the PV panels are OK - many times this issue is a PV problem. 2. Check that the PV panel aluminium frames and the inverter are grounded well; open the inverter cover and check that the inside ground cable is fixed well on the shell. 3. Check whether an AC/DC cable or terminal block is shorted to ground or has damaged insulation. 4. Restart the inverter; if the fault still exists, contact your installer.

F25

DC feedback fault.

Fault

Current was detected feeding back into the DC side.

CauseCurrent was detected flowing back into the DC side (DC feedback/backfeed).

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F26

The DC busbar is unbalanced.

Fault

The voltages on the two halves of the DC bus are unbalanced.

CauseThe DC bus half-voltages are unbalanced; the 'BUSN' cable or the driver-board power supply cable may be loose.

Recommended fix1. Check whether the 'BUSN' cable or the driver-board power supply cable is loose. 2. Restart the inverter; if the fault still exists, contact your installer.

F27

DC end insulation error.

Fault

An insulation error was detected at the DC end.

CauseThe insulation at the DC end of the power stage fell below the acceptable level.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F28

Inverter 1 DC high fault.

Fault

The DC component on inverter bridge 1 is too high.

CauseThe DC component measured on inverter bridge 1 is too high.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F29

AC load switch failure.

Fault

The AC load switch failed.

CauseThe AC load switch failed to operate correctly.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F30

AC main contactor failure.

Fault

The main AC relay/contactor failed to operate.

CauseThe main AC relay failed to close correctly: a relay fault, a relay driver circuit fault, or software that is not suitable for this inverter (old inverters have no relay detection function).

Recommended fix1. Check the relays and the AC voltage of the relays. 2. Check the relay driver circuit. 3. Check if the software is not suitable for this inverter (old inverters have no relay detection function). 4. Restart the inverter; if the fault still exists, contact your installer.

F31

Relay open circuit fault.

Fault

At least one AC relay cannot close.

CauseAt least one relay cannot be closed - a relay fault or a faulty relay driver signal (old inverters have no relay detection function).

Recommended fix1. Check the relays and their driver signals. 2. Restart the inverter; if the fault still exists, contact your installer.

F32

Inverter 2 dc high fault.

Fault

The DC component on inverter bridge 2 is too high.

CauseThe DC component measured on inverter bridge 2 is too high.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F33

AC over current.

Fault

The AC output current exceeded the over-current protection limit.

CauseThe AC output current exceeded the over-current protection limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F34

AC current over load.

Fault

The AC output current stayed above the rated level (overload).

CauseThe AC output current stayed above the rated level long enough to trip the overload protection.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F35

No AC grid.

Fault

No grid voltage is detected.

CauseNo AC grid voltage is present at the inverter: a grid outage, a bad AC connector or cable, or a fault in the AC voltage detection circuit.

Recommended fix1. Check the AC grid voltage and the AC voltage detection circuit; check that the AC connector is in good condition and that the AC grid is normal in voltage. 2. Restart the inverter; if the fault still exists, contact your installer.

F36

AC grid phase error.

Fault

A grid phase error was detected.

CauseThe grid phase sequence or phase angle is wrong, or a phase reference was lost.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F37

AC three-phase voltage unbalance failure.

Fault

The three grid phase voltages are unbalanced.

CauseThe three grid phase voltages are unbalanced beyond the allowed range.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F38

AC three-phase current unbalance failure.

Fault

The three output phase currents are unbalanced.

CauseThe three output phase currents are unbalanced beyond the allowed range.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F39

AC over current(one cycle).

Fault

AC over-current detected within one grid cycle.

CauseThe AC output current exceeded the limit within a single grid cycle; the AC current sensor or its circuit may be faulty.

Recommended fix1. Check the AC current sensor and its circuit. 2. Restart the inverter; if the fault still exists, contact your installer.

Source:033_BManual_SUN-70_75_80_90_100_110K-G03_20260702_en_a9db1e1b.pdf· page 63042_BManual_SUN-120_125_130_135_136K-G01P3-EU-AM8_20260702_en_05f936e3.pdf· page 62060_BManual_SUN-60_70_75K-G01P3-EU-AM8-LV_20260701_en_f559aeec.pdf· page 62067_BManual_SUN-60_70_75_80K-G03_20260309_en_a0739b4b.pdf· page 62

F40

DC over current.

Fault

The DC input current exceeded the over-current protection limit.

CauseThe DC input current exceeded the over-current protection limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F41

AC Line W,U over voltage.

Fault

The W-U line voltage is above the protection setting.

CauseThe line voltage between phases W and U exceeds the protection setting; an AC cable that is too thin raises the voltage at the inverter terminals under feed-in.

Recommended fixCheck the AC voltage protection setting, and check if the AC cable is too thin. Check the voltage difference between the LCD and a meter.

F42

AC Line W,U low voltage.

Fault

The W-U line voltage is below the protection setting.

CauseThe line voltage between phases W and U is below the protection setting; loose or incorrectly connected AC cables can cause the low reading.

Recommended fixCheck the AC voltage protection setting. Check the voltage difference between the LCD and a meter, and check whether all AC cables are firmly and correctly connected.

F43

AC Line V,W over voltage.

Fault

The V-W line voltage is above the protection setting.

CauseThe line voltage between phases V and W exceeds the protection setting; an AC cable that is too thin raises the voltage at the inverter terminals under feed-in.

Recommended fixCheck the AC voltage protection setting, and check if the AC cable is too thin. Check the voltage difference between the LCD and a meter.

F44

AC Line V,W low voltage.

Fault

The V-W line voltage is below the protection setting.

CauseThe line voltage between phases V and W is below the protection setting; loose or incorrectly connected AC cables can cause the low reading.

Recommended fixCheck the AC voltage protection setting. Check the voltage difference between the LCD and a meter, and check whether all AC cables are firmly and correctly connected.

F45

AC Line U,V over voltage.

Fault

The U-V line voltage is above the protection setting.

CauseThe line voltage between phases U and V exceeds the protection setting; an AC cable that is too thin raises the voltage at the inverter terminals under feed-in.

Recommended fixCheck the AC voltage protection setting, and check if the AC cable is too thin. Check the voltage difference between the LCD and a meter.

F46

AC Line U,V low voltage.

Fault

The U-V line voltage is below the protection setting.

CauseThe line voltage between phases U and V is below the protection setting.

Recommended fixCheck the AC voltage protection setting.

F47

AC Over frequency.

Fault

The grid frequency is above the protection setting.

CauseThe measured grid frequency is above the configured protection limit.

Recommended fixCheck the frequency protection setting.

F48

AC lower frequency.

Fault

The grid frequency is below the protection setting.

CauseThe measured grid frequency is below the configured protection limit.

Recommended fixCheck the frequency protection setting.

F49

U phase grid current DC component over current.

Fault

The DC component of the U-phase grid current is too high.

CauseThe DC component of the U-phase grid current exceeds the allowed limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F50

V phase grid current DC component over current.

Fault

The DC component of the V-phase grid current is too high.

CauseThe DC component of the V-phase grid current exceeds the allowed limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F51

W phase grid current DC component over current.

Fault

The DC component of the W-phase grid current is too high.

CauseThe DC component of the W-phase grid current exceeds the allowed limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F52

AC inductor A, phase current DC current high.

Fault

The DC current through AC filter inductor phase A is too high.

CauseThe DC current component through AC filter inductor phase A exceeds the allowed limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F53

AC inductor B, phase current DC current high.

Fault

The DC current through AC filter inductor phase B is too high.

CauseThe DC current component through AC filter inductor phase B exceeds the allowed limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F54

AC inductor C, phase current DC current high.

Fault

The DC current through AC filter inductor phase C is too high.

CauseThe DC current component through AC filter inductor phase C exceeds the allowed limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F55

DC busbar voltage is too high.

Fault

The DC bus voltage is above the limit.

CauseThe DC bus (Ubus) voltage is above the limit - usually the PV input voltage is too high because too many solar panels are connected in series, or the Ubus detection circuit is faulty.

Recommended fix1. Check the PV voltage and the Ubus voltage and their detection circuit; if the PV input voltage exceeds the limit, reduce the number of solar panels in series. 2. For the Ubus voltage, check the LCD display.

F56

DC busbar voltage is too low.

Fault

The DC bus voltage is below the limit.

CauseThe PV input voltage is low - it always happens in the early morning; if F56 appears while the inverter is running, a loss of the driver or firmware that needs updating may be responsible.

Recommended fix1. Check the PV voltage and the Ubus voltage - in the early morning this normally just reflects low PV input voltage. 2. if it shows while the inverter is running, the driver may have been lost or the firmware may need updating. 3. Restart the inverter; if the fault still exists, contact your installer.

F57

AC reverse irrigation.

Fault

Reverse power flow into the AC grid was detected ('AC reverse irrigation', i.e. reverse feed-in).

CausePower is flowing back into the AC grid beyond what the configuration allows, so the inverter flags reverse feed-in (the manual's remedy column simply restates 'AC reverse irrigation').

Recommended fixIf export to the grid is not intended, check the zero-export/limiter settings and the meter or sensor-clamp installation; restart the inverter and contact your installer if the fault persists.

F58

AC grid U over current.

Fault

Over-current on grid phase U.

CauseThe grid current on phase U exceeded the over-current limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F59

AC grid V over current.

Fault

Over-current on grid phase V.

CauseThe grid current on phase V exceeded the over-current limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

Source:042_BManual_SUN-120_125_130_135_136K-G01P3-EU-AM8_20260702_en_05f936e3.pdf· page 63060_BManual_SUN-60_70_75K-G01P3-EU-AM8-LV_20260701_en_f559aeec.pdf· page 63067_BManual_SUN-60_70_75_80K-G03_20260309_en_a0739b4b.pdf· page 63

F60

AC grid W over current.

Fault

Over-current on grid phase W.

CauseThe grid current on phase W exceeded the over-current limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F61

Reactor A phase over current.

Fault

Over-current through filter reactor phase A.

CauseThe current through filter reactor phase A exceeded the over-current limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F62

Reactor B phase over current.

Fault

Over-current through filter reactor phase B.

CauseThe current through filter reactor phase B exceeded the over-current limit.

Recommended fixRestart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.

F63

ARC fault.

Fault

A DC arc was detected on the PV side.

CauseA DC arc was detected in the PV module cabling (arc-fault protection), usually at a loose or degraded PV cable connection.

Recommended fix1. Check the PV module cable connection and clear the fault. 2. Seek help from Deye if the inverter cannot go back to the normal state.

F64

IGBT heat sink high temperature.

Fault

The IGBT heat-sink temperature is too high.

CauseThe IGBT heat-sink temperature exceeded the limit - inadequate cooling or high ambient temperature, or a temperature sensor fault, unsuitable firmware, or a wrong model configuration producing a false reading.

Recommended fix1. Check the temperature sensor; check that the firmware is suitable for the hardware and that the inverter is its right model. 2. Restart the inverter; if the fault still exists, contact your installer.

Warning codes (4)unit keeps running · red LED flashing

W03

Arc warning.

Warning

An arc issue was detected on the PV side of the inverter.

CauseAn electrical arc has formed on the PV side, usually at a poor or loose PV string connection.

Recommended fixCheck the connection of the PV, then clear the fault through the ARC function in the operating parameters; the inverter can then resume operation.

Source:033_BManual_SUN-70_75_80_90_100_110K-G03_20260702_en_a9db1e1b.pdf· page 59042_BManual_SUN-120_125_130_135_136K-G01P3-EU-AM8_20260702_en_05f936e3.pdf· page 59060_BManual_SUN-60_70_75K-G01P3-EU-AM8-LV_20260701_en_f559aeec.pdf· page 59067_BManual_SUN-60_70_75_80K-G03_20260309_en_a0739b4b.pdf· page 59

W05

Upgrade error warning.

Warning

The firmware was upgraded incorrectly.

CauseThe firmware was upgraded incorrectly (a wrong or failed firmware package was loaded).

Recommended fixUpgrade to the correct firmware.

W13

Fan warning.

Warning

A cooling fan is not working.

CauseOne or more fan cables are not properly connected, or a fan is broken.

Recommended fixCheck whether all fan cables are properly connected, or replace the faulty fan.

W15

Prefix error.

Warning

A firmware version (prefix) error occurred during upgrade.

CauseA version error occurred during a firmware upgrade, leaving the inverter with a mismatched firmware version prefix.

Recommended fixContact an after-sales engineer to send the command that fixes the version error.

Still seeing a code on your SUN G03/G01P3-AM8 Series?

Send us the code on your screen and a DEYE technician will reply with the exact steps for your unit. Support is free for life — a first diagnosis never needs a callout.

Message a technician on WhatsApp Call +971542899793 or use the contact form

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Related devices

Common questions about SUN G03/G01P3-AM8 Series error codes

What is the difference between a fault and a warning on the SUN G03/G01P3-AM8 Series?: A fault cuts the unit's output and the red LED stays solid — this page lists 64 of them for the SUN G03/G01P3-AM8 Series. A warning only flashes the red LED and the unit keeps running; there are 4 warning codes here. Resolve the cause of a fault before restarting; warnings can usually be cleared while the unit runs.
Which model numbers does this page cover?: The SUN G03/G01P3-AM8 Series shares its firmware and fault table with 14 other model numbers: SUN-60K-G03, SUN-70K-G03, SUN-75K-G03, SUN-80K-G03, SUN-90K-G03, SUN-100K-G03, SUN-110K-G03, SUN-60K-G01P3-EU-AM8-LV, SUN-70K-G01P3-EU-AM8-LV, SUN-75K-G01P3-EU-AM8-LV, SUN-120K-G01P3-EU-AM8, SUN-125K-G01P3-EU-AM8, SUN-130K-G01P3-EU-AM8, SUN-135K-G01P3-EU-AM8, SUN-136K-G01P3-EU-AM8. If your unit is any of these, every code on this page applies to it.
Where do these codes come from?: Every entry was transcribed from 033_BManual_SUN-70_75_80_90_100_110K-G03_20260702_en_a9db1e1b.pdf, 042_BManual_SUN-120_125_130_135_136K-G01P3-EU-AM8_20260702_en_05f936e3.pdf, 060_BManual_SUN-60_70_75K-G01P3-EU-AM8-LV_20260701_en_f559aeec.pdf, 067_BManual_SUN-60_70_75_80K-G03_20260309_en_a0739b4b.pdf — DEYE's official documentation. Each row cites its source manual (and page where printed), so you can verify the wording before acting on it.

Compiled from official DEYE user manuals. Always consult your device manual and a qualified technician before performing repairs.

How to read the severity labels

Fault codes (64)output stops · red LED solid

DC input polarity reverse fault.

DC insulation impedance permanent fault.

DC leakage current fault.

Ground fault GFDI.

Read the memory error.

Write the memory error.

GFDI blown fuse.

GFDI grounding touch failure.

IGBT damaged by excessive drop voltage.

Auxiliary switch power supply failure.

AC main contactor errors.

AC auxiliary contactor errors.

Reserved.

DC firmware over current.

AC firmware over current.

GFCI(RCD) Ac leakage current fault.

Three phase current, over-current fault.

AC over current fault of hardware.

All hardware failure synthesis.

DC over current fault of the hardware.

DC leakage flow fault.

Crash stop (if there is a stop button).

AC leakage current is transient over current.

DC insulation impedance failure.

DC feedback fault.

The DC busbar is unbalanced.

DC end insulation error.

Inverter 1 DC high fault.

AC load switch failure.

AC main contactor failure.

Relay open circuit fault.

Inverter 2 dc high fault.

AC over current.

AC current over load.

No AC grid.

AC grid phase error.

AC three-phase voltage unbalance failure.

AC three-phase current unbalance failure.

AC over current(one cycle).

DC over current.

AC Line W,U over voltage.

AC Line W,U low voltage.

AC Line V,W over voltage.

AC Line V,W low voltage.

AC Line U,V over voltage.

AC Line U,V low voltage.

AC Over frequency.

AC lower frequency.

U phase grid current DC component over current.

V phase grid current DC component over current.

W phase grid current DC component over current.

AC inductor A, phase current DC current high.

AC inductor B, phase current DC current high.

AC inductor C, phase current DC current high.

DC busbar voltage is too high.

DC busbar voltage is too low.

AC reverse irrigation.

AC grid U over current.

AC grid V over current.

AC grid W over current.

Reactor A phase over current.

Reactor B phase over current.

ARC fault.

IGBT heat sink high temperature.

Warning codes (4)unit keeps running · red LED flashing

Arc warning.

Upgrade error warning.

Fan warning.

Prefix error.

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Common questions about SUN G03/G01P3-AM8 Series error codes