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+18
What it means
ARC fault — A DC arc was detected on the PV side.
Cause: A DC arc was detected in the PV module cabling (arc-fault protection), usually at a loose or degraded PV cable connection.
How to fix it
- 1Check the PV module cable connection and clear the fault
- 2Seek help from Deye if the inverter cannot go back to the normal state.
Source: 041_BManual_SUN-120_125_130_135_136K-G01P3-EU-BM8_20251021_en_a2166559.pdf, p.64 · 065_BManual_SUN-7_7.5_8K-G02P1-EU-AM2_20260625_en_4466f08b.pdf, p.53 · 032_BManual_SUN-9_10_10.5K-G02P1-EU-AM2_20260625_en_df0f2106.pdf, p.53 · +3 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
ARC fault — A DC arc fault was detected on the PV side (AFCI protection).
Cause: A sustained PV-side DC arc, typically from a loose, poor, or damaged PV module cable connection.
How to fix it
Check the PV module cable connections and clear the fault; seek help from Deye if the inverter cannot go back to its normal state.
Source: 063_BManual_SUN-6K-G06-LV-P1_20250923_en_30a96699.pdf, p.59 · 031_BManual_SUN-1_1.5_2_2.2_2.5_2.7_3_3.3_3.6_4K-G04P1-EU-AM1_20260624_en_15adc00c.pdf, p.55 · 036_BManual_SUN-3_4_5_6_7_8_9_10_12_15K-G06P3-EU-BM2_20250506_en_0eb78440.pdf, p.59
Also applies to:SUN-3.6K-SG05LP1-EU-SM2-PSUN-5K-SG05LP1-EU-SM2-PSUN-6K-SG05LP1-EU-SM2-PSUN-7K-SG05LP1-EU-SM2-PSUN-7.6K-SG05LP1-EU-SM2-PSUN-8K-SG05LP1-EU-SM2-PSUN-10K-SG05LP1-EU-SM2-PSUN-7.6K-SG01LP1-EU+21
What it means
ARC fault — PV arc fault detected (AFCI). ARC fault detection is only for the US market.
Cause: DC arcing detected on the PV side, typically from a bad PV module cable connection.
How to fix it
- 1Check the PV module cable connection and clear the fault.
- 2Seek help from Deye if the inverter cannot go back to the normal state.
Source: 039_BManual_SUN-3.6_5_6_7_7.6_8_10K-SG05LP1-EU-SM2-P_20260428_en_70c401a6.pdf, p.51 · 043_BManual_SUN-12_14_16K-SG01LP1-EU_20260519_en_703e15ac.pdf, p.47 · 052_BManual_SUN-_3.6-6_K-OG01LP1-EU-AM2_20260406_en_dc31b173.pdf, p.46 · +4 more official manuals
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
Arc Fault — ARC_Fault - a PV DC arc fault was detected.
Cause: An electric arc was detected on the PV module cabling (ARC fault detection is only for the US market).
How to fix it
Check the PV module cable connection and clear the fault.
Source: 037_BManual_SUN-5_6_8_10_12_15_20_25K-SG01HP3-EU-AM2_20260224_en_9ef2717c.pdf, p.52 · 050_BManual_SUN-29.9_30_35_40_50K-SG01HP3-EU-BM3_4_20260224_en_544e1b2f.pdf, p.53 · 062_BManual__SUN-60_70_75_80K-SG02HP3-EU-EM6_20260224_en_38cbc9f6.pdf, p.53
Also applies to:SUN-5K-SG02LP2-US-AM2SUN-6K-SG02LP2-US-AM2SUN-7.6K-SG02LP2-US-AM2SUN-8K-SG02LP2-US-AM2SUN-10K-SG02LP2-US-AM3SUN-12K-SG02LP2-US-AM3
What it means
Arc Fault — ARC fault - a PV DC arc fault was detected.
Cause: An electric arc was detected on the PV module cabling (ARC fault detection is only for the US market).
How to fix it
- 1Check the PV module cable connection and clear the fault
- 2Seek help from us if it cannot go back to the normal state.
Source: 059_BManual_SUN-5_6_7.6_8_10_12K-SG02LP2-US-AM2_AM3_20260406_en_fb6a30c7.pdf, p.55
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
Arc Fault — ARC fault - a PV DC arc fault was detected.
Cause: An electric arc was detected on the PV module cabling.
How to fix it
- 1Check the PV module cable connection and clear the fault
- 2Seek help from us if it cannot go back to the normal state.
Source: 038_BManual_SUN-5_6_8_10_12K-SG04LP3-EU_20260319_en_081932c1.pdf, p.48 · 040_BManual_SUN-3_4_5_6_8_10_12K-SG05LP3-EU-SM2_20260319_en_b0183b7d.pdf, p.48 · 044_BManual_SUN-14_15_16_18_20K-SG05LP3-EU-SM2_20260319_en_ac7cdbd1.pdf, p.48
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
ARC fault — DC arc fault detected (US market only).
Cause: A DC arc was detected in the PV wiring - typically a loose, damaged, or corroded PV module cable connection (ARC detection is for the US market only).
How to fix it
- 1Check the PV module cable connections, repair the arcing point, and clear the fault.
- 2Seek help from Deye if it does not return to normal.
Source: 002_Download_4e90fe7a.pdf, p.48
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
ARC_Fault — DC arc fault detected (US market only).
Cause: A DC arc was detected in the PV wiring - typically a loose, damaged, or corroded PV module cable connection (ARC detection is for the US market only).
How to fix it
- 1Check the PV module cable connections, repair the arcing point, and clear the fault.
- 2Seek help from Deye if it does not return to normal.
Source: 081_deye_gb_sl_pro_user_manual_46fa941a.pdf, p.51 · 010_Download_cc05df18.pdf, p.46