Also applies to:SUN-120K-G01P3-EU-BM8SUN-125K-G01P3-EU-BM8SUN-130K-G01P3-EU-BM8SUN-135K-G01P3-EU-BM8SUN-136K-G01P3-EU-BM8SUN-7K-G02P1-EU-AM2SUN-7.5K-G02P1-EU-AM2SUN-8K-G02P1-EU-AM2+3
What it means
AC firmware over current — Firmware-level AC over-current protection tripped.
Cause: The 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.
How to fix it
- 1Check the internal AC sensor, its detection circuit on the control board and the connection wiring
- 2Restart the inverter; if the error still exists, contact your installer or Deye service.
Source: sun-120k-g01p3-eu-bm8-sun-125k-g01p3-eu-bm8-sun-130k-g01p3-eu-bm8-manual.pdf, p.61 · sun-7k-g02p1-eu-am2-sun-7-5k-g02p1-eu-am2-sun-8k-g02p1-eu-am2-manual.pdf, p.51 · sun-9k-g02p1-eu-am2-sun-10k-g02p1-eu-am2-sun-10-5k-g02p1-eu-am2-manual.pdf, p.51
Also applies to:SUN-60K-G03SUN-70K-G03SUN-75K-G03SUN-80K-G03SUN-90K-G03SUN-100K-G03SUN-110K-G03SUN-60K-G01P3-EU-AM8-LV+7
What it means
AC firmware over current — Firmware-level AC over-current protection tripped.
Cause: The 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.
How to fix it
- 1Check the internal AC sensor, its detection circuit on the control board and the connection wiring
- 2Restart the inverter; if the error still exists, contact your installer.
Source: sun-70k-g03-sun-75k-g03-sun-80k-g03-sun-90k-g03-sun-100k-g03-sun-110k-g03-manual.pdf, p.60 · sun-120k-g01p3-eu-am8-manual.pdf, p.60 · sun-60k-g01p3-eu-am8-lv-sun-70k-g01p3-eu-am8-lv-sun-75k-g01p3-eu-am8-lv-manual.pdf, p.60 · +1 more official manuals
Also applies to:SUN-6K-G06-LV-P1SUN-8K-G06-LV-P1SUN-6K-G06P3-EU-BM2-LV-P1SUN-8K-G06P3-EU-BM2-LV-P1SUN-10K-G05-LVSUN-12K-G05-LVSUN-15K-G05-LVSUN-15K-G06P3-EU-BM2-P1+71
What it means
AC firmware over current — AC current exceeded the firmware (software) over-current limit.
Cause: The internal AC sensor or detection circuit on the control board, or its connection wire, may be loose and giving an over-current reading, or the AC current genuinely exceeded the software limit.
How to fix it
Restart the inverter; if the error still exists, contact your installer or Deye service.
Source: sun-6k-g06-lv-p1-manual.pdf, p.56 · sun-2-7k-g04p1-eu-am1-sun-3k-g04p1-eu-am1-sun-3-3k-g04p1-eu-am1-sun-3-6k-g04p1-eu-am1-sun-4k-g04p1-eu-am1-manual.pdf, p.53 · sun-7k-g06p3-eu-bm2-sun-8k-g06p3-eu-bm2-sun-9k-g06p3-eubm2-sun-10k-g06p3-eu-bm2-sun-12k-g06p3-eu-bm2-manual.pdf, p.56
Also applies to:SUN-5K-SG01HP3-EU-AM2SUN-6K-SG01HP3-EU-AM2SUN-8K-SG01HP3-EU-AM2SUN-10K-SG01HP3-EU-AM2SUN-12K-SG01HP3-EU-AM2SUN-15K-SG01HP3-EU-AM2SUN-20K-SG01HP3-EU-AM2SUN-25K-SG01HP3-EU-AM2+9
What it means
AC Overcurrent (Software) — AC_OverCurr_SW_Failure - AC side overcurrent fault detected by software.
Cause: The AC-side current exceeded the software protection limit, typically because the backup load power and common load power are beyond the allowed range.
How to fix it
- 1Check whether the backup load power and common load power are within the range
- 2Restart and check whether it is normal.
Source: sun-12k-sg01hp3-eu-am2-manual.pdf, p.49 · sun-29.9-30-35-40-50k-sg01hp3-eu-bm3-4-20260224-en-manual.pdf, p.50 · sun-60-70-75-80k-sg02hp3-eu-em6-20260224-en-manual.pdf, p.50
Also applies to:SUN-5K-SG04LP3-EUSUN-6K-SG04LP3-EUSUN-8K-SG04LP3-EUSUN-10K-SG04LP3-EUSUN-12K-SG04LP3-EUSUN-3K-SG05LP3-EU-SM2SUN-4K-SG05LP3-EU-SM2SUN-5K-SG05LP3-EU-SM2+9
What it means
AC Overcurrent (Software) — AC over current fault of software - AC side overcurrent fault detected by software.
Cause: The AC-side current exceeded the software protection limit, typically because the backup load power and common load power are beyond the allowed range.
How to fix it
- 1Check whether the backup load power and common load power are within the range
- 2Restart and check whether it is normal
- 3Seek help from us if it cannot go back to the normal state.
Source: sun-5-6-8-10-12k-sg04lp3-eu-20260319-en-manual.pdf, p.46 · sun-3-4-5-6-8-10-12k-sg05lp3-eu-sm2-20260319-en-manual.pdf, p.46 · sun-14-15-16-18-20k-sg05lp3-eu-sm2-20260319-en-manual.pdf, p.46
Energy storage systemFault Also applies to:AI-W5.1-5P3-EU-B-ESSAI-W5.1-6P3-EU-B-ESSAI-W5.1-8P3-EU-B-ESSAI-W5.1-10P3-EU-B-ESSAI-W5.1-12P3-EU-B-ESS
What it means
AC over current fault of software — AC side over-current fault (software detection).
Cause: The combined backup-load and common-load power exceeded the inverter's AC output range.
How to fix it
- 1Check that the backup load power and common load power are within range, restart, and check whether operation is normal.
- 2Seek help from Deye if it does not recover.
Source: ai-w5-1-b-datasheet.pdf, p.46
Energy storage systemFault Also applies to:GB-SL5K-EUGB-SL6K-EUGB-SL8K-EUGB-SL10K-EUGB-SL12K-EUGB-SL15K-EUGB-SL20K-EUGB-SL Pro 5K-EU+6
What it means
AC_OverCurr_SW_Failure — AC side over-current fault (software detection).
Cause: The combined backup-load and common-load power exceeded the inverter's AC output range.
How to fix it
- 1Check that the backup load power and common load power are within range, restart, and check whether operation is normal.
- 2Seek help from Deye if it does not recover.
Source: gb-s12k-eu-gb-s15k-eugb-s20k-eu-gb-s15k-eu-gb-s20k-eu-manual.pdf, p.49 · gb-s5k-eu-gb-s20k-eu-datasheet.pdf, p.44
Also applies to:GB-A
What it means
ALARM_ID_DSG_OVER_CUR_LEV_2 — Discharge current fault.
Cause: Discharge current exceeded the level-2 limit - the load or PCS demand is above the battery's rated discharge current.
How to fix it
- 1Reduce the load or the PCS discharge-current limit, then restart.
- 2Contact Deye support if it recurs within rating.
Source: gb-a-pack6-gb-a4-gb-a10-gb-a16-manual.pdf, p.13