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
AC Line W,U low voltage — The W-U line voltage is below the protection setting.
Cause: The line voltage between phases W and U is below the protection setting; loose or incorrectly connected AC cables can cause the low reading.
How to fix it
- 1Check the AC voltage protection setting.
- 2Check the voltage difference between the LCD and a meter, and check whether all AC cables are firmly and correctly connected.
Source: 041_BManual_SUN-120_125_130_135_136K-G01P3-EU-BM8_20251021_en_a2166559.pdf, p.63 · 065_BManual_SUN-7_7.5_8K-G02P1-EU-AM2_20260625_en_4466f08b.pdf, p.52 · 032_BManual_SUN-9_10_10.5K-G02P1-EU-AM2_20260625_en_df0f2106.pdf, p.52 · +4 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 Line W,U low voltage — The line voltage between phases W and U is below the protection setting.
Cause: Grid W-U line voltage below the protection setting, or AC cables not firmly and correctly connected.
How to fix it
Check the AC voltage protection setting; check the voltage difference between the LCD and a meter; check that all AC cables are firmly and correctly connected.
Source: 063_BManual_SUN-6K-G06-LV-P1_20250923_en_30a96699.pdf, p.58 · 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.54 · 036_BManual_SUN-3_4_5_6_7_8_9_10_12_15K-G06P3-EU-BM2_20250506_en_0eb78440.pdf, p.58
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
AC line low voltage — Grid voltage fault: the AC line voltage is out of the permitted range.
Cause: The grid AC voltage is outside the standard voltage range in the specification, or the grid AC cables are not firmly and correctly connected.
How to fix it
- 1Check that the AC voltage is in the range of the standard voltage in the specification and that the grid AC cables are firmly and correctly connected.
- 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.50 · 043_BManual_SUN-12_14_16K-SG01LP1-EU_20260519_en_703e15ac.pdf, p.46 · 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
Parallel Version Fault — Parallel_Version_Fault - the firmware versions of the paralleled inverters do not match.
Cause: The software/firmware versions of the inverters connected in parallel are not consistent.
How to fix it
- 1Check whether the inverter versions are consistent
- 2Contact us to upgrade the software version.
Source: 037_BManual_SUN-5_6_8_10_12_15_20_25K-SG01HP3-EU-AM2_20260224_en_9ef2717c.pdf, p.51 · 050_BManual_SUN-29.9_30_35_40_50K-SG01HP3-EU-BM3_4_20260224_en_544e1b2f.pdf, p.52 · 062_BManual__SUN-60_70_75_80K-SG02HP3-EU-EM6_20260224_en_38cbc9f6.pdf, p.52
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-AM3SUN-5K-SG04LP3-EUSUN-6K-SG04LP3-EU+15
What it means
AC Line Low Voltage — AC line low voltage - grid voltage fault.
Cause: The grid AC line voltage is below the standard voltage range in the specification.
How to fix it
- 1Check that the AC voltage is in the range of the standard voltage in the specification
- 2Check whether the grid AC cables are firmly and correctly connected
- 3Seek 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 · 038_BManual_SUN-5_6_8_10_12K-SG04LP3-EU_20260319_en_081932c1.pdf, p.47 · 040_BManual_SUN-3_4_5_6_8_10_12K-SG05LP3-EU-SM2_20260319_en_b0183b7d.pdf, p.47 · +1 more official manuals
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 line low voltage — Grid voltage fault - AC line voltage out of range (low).
Cause: The grid AC voltage is outside (below) the standard voltage range in the specification, or the grid AC cables are loose or incorrectly connected.
How to fix it
- 1Check that the AC voltage is within the standard range and that the grid AC cables are firmly and correctly connected.
- 2Seek help from Deye if it does not recover.
Source: 002_Download_4e90fe7a.pdf, p.47
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
Parallel_Version_Fault — Parallel firmware-version mismatch.
Cause: The firmware versions of the paralleled inverters are not consistent.
How to fix it
Check whether the inverter firmware versions are consistent and contact Deye to upgrade the software to matching versions.
Source: 081_deye_gb_sl_pro_user_manual_46fa941a.pdf, p.50 · 010_Download_cc05df18.pdf, p.45
Also applies to:GB-A
What it means
ALARM_ID_CHG_RELAY_DRIVE_FAULT — Charging relay drive failure.
Cause: The drive circuit for the charge relay failed - the relay cannot be actuated.
How to fix it
- 1Restart the system.
- 2If the fault persists, contact Deye support for service.
Source: 008_deye_ess_user_manual_gb_a_jpnen_v02_20250829_3fea617e.pdf, p.14