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
IGBT heat sink high temperature — The IGBT heat-sink temperature is too high.
Cause: The 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.
How to fix it
- 1Check the temperature sensor; check that the firmware is suitable for the hardware and that the inverter is its right model
- 2Restart the inverter; if the fault still exists, contact your installer or Deye service.
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
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
IGBT heat sink high temperature — The IGBT heat-sink temperature is too high.
Cause: The 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.
How to fix it
- 1Check the temperature sensor; check that the firmware is suitable for the hardware and that the inverter is its right model
- 2Restart the inverter; if the fault still exists, contact your installer.
Source: 042_BManual_SUN-120_125_130_135_136K-G01P3-EU-AM8_20260702_en_05f936e3.pdf, p.63 · 060_BManual_SUN-60_70_75K-G01P3-EU-AM8-LV_20260701_en_f559aeec.pdf, p.63 · 067_BManual_SUN-60_70_75_80K-G03_20260309_en_a0739b4b.pdf, p.63
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
IGBT heat sink high temperature — The IGBT heat-sink temperature exceeded its limit.
Cause: IGBT heat-sink over-temperature; it can also be a faulty temperature sensor, firmware not suitable for the hardware, or a wrong inverter model configuration.
How to fix it
- 1Check the temperature sensor; check that the firmware is suitable for the hardware and that the inverter is its right model.
- 2Restart the inverter; if the fault still exists, contact your installer or Deye service.
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
Heat sink high temperature failure — The heat sink temperature is too high.
Cause: The working environment temperature is too high, causing the inverter heat sink to overheat.
How to fix it
- 1Check whether the work environment temperature is too high.
- 2Turn off the inverter for 10 minutes and restart.
- 3Seek 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
Heat Sink Overtemperature — Heatsink_HighTemp_Fault - the heat sink temperature is too high.
Cause: The heat sink temperature exceeded the limit; the working environment temperature may be too high.
How to fix it
- 1Check whether the working environment temperature is too high
- 2Turn off the inverter for 10 minutes and restart.
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-AM3SUN-5K-SG04LP3-EUSUN-6K-SG04LP3-EU+15
What it means
Heat Sink High Temperature — Heat sink high temperature failure - the heat sink temperature is too high.
Cause: The heat sink temperature exceeded the limit; the working environment temperature may be too high.
How to fix it
- 1Check whether the working environment temperature is too high
- 2Turn off the inverter for 10 minutes and restart
- 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.48 · 040_BManual_SUN-3_4_5_6_8_10_12K-SG05LP3-EU-SM2_20260319_en_b0183b7d.pdf, p.48 · +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
Heat sink high temperature failure — Heat sink temperature is too high.
Cause: The inverter heat-sink temperature exceeded its limit - working environment temperature too high or insufficient cooling.
How to fix it
- 1Check whether the work environment temperature is too high; turn the inverter off for 10 minutes and restart.
- 2Seek help from Deye if it does not recover.
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
Heatsink_HighTemp_Fault — Heat sink temperature is too high.
Cause: The inverter heat-sink temperature exceeded its limit - working environment temperature too high or insufficient cooling.
How to fix it
- 1Check whether the working environment temperature is too high; turn the inverter off for 10 minutes and restart.
- 2Seek help from Deye if it does not recover.
Source: 081_deye_gb_sl_pro_user_manual_46fa941a.pdf, p.51 · 010_Download_cc05df18.pdf, p.46