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 main contactor errors — The main AC contactor did not operate correctly. The manual notes this code has hardly ever appeared in the field.
Cause: The main AC contactor failed to switch as commanded or returned an implausible feedback state.
How to fix it
Restart the inverter; if the code persists after the restart, contact your installer or Deye service and provide the inverter serial number, the installation date and the displayed error code.
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 main contactor errors — The main AC contactor did not operate correctly.
Cause: The main AC contactor failed to switch as commanded or returned an implausible feedback state.
How to fix it
Restart the inverter; if the fault is not ruled out, contact the installer or the manufacturer's customer service.
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+27
What it means
AC main contactor errors — The AC main contactor (grid relay) did not operate correctly.
Cause: The main AC contactor failed to open or close as commanded, or its feedback signal is wrong.
How to fix it
Restart the inverter; if the fault is not ruled out, contact the installer or manufacturer customer service.
Source: sun-6k-g06-lv-p1-manual.pdf, p.56
Also applies to:SUN-1K-G04P1-EU-AM1SUN-1.5K-G04P1-EU-AM1SUN-2K-G04P1-EU-AM1SUN-2.2K-G04P1-EU-AM1SUN-2.5K-G04P1-EU-AM1SUN-2.7K-G04P1-EU-AM1SUN-3K-G04P1-EU-AM1SUN-3.3K-G04P1-EU-AM1+36
What it means
AC main contactor errors — The AC main contactor (grid relay) did not operate correctly.
Cause: The main AC contactor failed to open or close as commanded, or its feedback signal is wrong.
How to fix it
Deye states this code has hardly ever appeared in the field; contact your installer or Deye service if it occurs.
Source: 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 Main Contactor Failure — AC_MainContactor_Failure - the main AC contactor (relay) reported a fault.
Cause: The main AC contactor of the inverter failed its check or did not switch correctly.
How to fix it
Restart the inverter 3 times and restore the factory settings.
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:RW-L2.5ARW-L5.1RW-L10.2RW-F16SE-F5SE-F5 PlusSE-F5 ProSE-F12+7
What it means
Cell voltage over difference — The voltage spread between cells exceeded the allowed difference.
Cause: Cell imbalance from long storage, aging, or repeated partial cycling widened the voltage gap between the highest and lowest cell beyond the threshold.
How to fix it
- 1Charge the battery fully at low current and hold it there so the BMS can balance the cells.
- 2If the difference does not close after several full charges, contact Deye support.
Source: deye-rw-l2.5a-user-manual-en.pdf, p.10 · rw-f16-manual.pdf, p.10 · rw-l10-2-manual.pdf, p.10 · +6 more official manuals
Also applies to:GB-A
What it means
ALARM_ID_PRE_CHG_RES_OVER_TEMP_LEV_2 — The temperature of the precharge resistance is too high.
Cause: Repeated or prolonged precharge attempts - typically into a bus short or an oversized capacitive load - overheated the precharge resistor.
How to fix it
- 1Switch off and let the unit cool; check the DC bus and PCS side for shorts or abnormal loading before restarting.
- 2Contact Deye support if it recurs.
Source: gb-a-pack6-gb-a4-gb-a10-gb-a16-manual.pdf, p.13