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 grid U over current — Over-current on grid phase U. The manual notes this code has hardly ever appeared in the field.
Cause: The grid current on phase U exceeded the over-current limit.
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.63 · sun-7k-g02p1-eu-am2-sun-7-5k-g02p1-eu-am2-sun-8k-g02p1-eu-am2-manual.pdf, p.53 · sun-9k-g02p1-eu-am2-sun-10k-g02p1-eu-am2-sun-10-5k-g02p1-eu-am2-manual.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
AC grid U over current — Over-current on grid phase U.
Cause: The grid current on phase U exceeded the over-current limit.
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.63 · sun-120k-g01p3-eu-am8-manual.pdf, p.62 · sun-60k-g01p3-eu-am8-lv-sun-70k-g01p3-eu-am8-lv-sun-75k-g01p3-eu-am8-lv-manual.pdf, p.62 · +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 grid U over current — Over-current on the U-phase grid current.
Cause: The U-phase grid current exceeded its protection limit.
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.59
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 grid U over current — Over-current on the U-phase grid current.
Cause: The U-phase grid current exceeded its protection limit.
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.55 · 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.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
BMS communication fault — Communication between the hybrid inverter and the battery BMS is disconnected while 'BMS_Err-Stop' is active.
Cause: The communication link between the hybrid inverter and the battery BMS has been lost while the 'BMS_Err-Stop' setting is enabled.
How to fix it
- 1Restore the communication between the inverter and the battery BMS.
- 2If you do not want this fault reported, you can disable the 'BMS_Err-Stop' item on the LCD.
- 3If the fault still exists, contact Deye for help.
Source: sun-3.6-5-6-7-7.6-8-10k-sg05lp1-eu-sm2-p-20260428-en-manual.pdf, p.51 · sun-12-14-16k-sg01lp1-eu-20260519-en-manual.pdf, p.47 · sun-3.6-6-k-og01lp1-eu-am2-20260406-en-manual.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
Battery Communication Lost — Battery_Comm_Lose - communication with the battery BMS has been lost.
Cause: The communication between the hybrid inverter and the battery BMS is disconnected while the 'BMS_Err-Stop' function is active.
How to fix it
To avoid this error, disable the 'BMS_Err-Stop' item on the LCD.
Source: sun-12k-sg01hp3-eu-am2-manual.pdf, p.52 · sun-29.9-30-35-40-50k-sg01hp3-eu-bm3-4-20260224-en-manual.pdf, p.53 · sun-60-70-75-80k-sg02hp3-eu-em6-20260224-en-manual.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
BMS Communication Fault — BMS communication fault - communication with the battery BMS has been lost.
Cause: The communication between the hybrid inverter and the battery BMS is disconnected while the 'BMS_Err-Stop' function is active.
How to fix it
- 1If you do not want this to happen, disable the 'BMS_Err-Stop' item on the LCD
- 2If the fault still exists, contact us for help.
Source: sun-5k-sg02lp2-us-am2-sun-10k-sg02lp2-us-am3-sun-12k-sg02lp2-us-am3-manual.pdf, p.55 · sun-5-6-8-10-12k-sg04lp3-eu-20260319-en-manual.pdf, p.48 · sun-3-4-5-6-8-10-12k-sg05lp3-eu-sm2-20260319-en-manual.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
BMS communication fault — Battery BMS communication lost.
Cause: Communication between the hybrid inverter and the battery BMS disconnected while 'BMS_Err-Stop' is active.
How to fix it
- 1Restore the BMS communication link (cable, pinout, protocol).
- 2If you do not want the inverter to stop on BMS loss, disable the 'BMS_Err-Stop' item on the LCD.
- 3If the fault still exists, contact Deye for help.
Source: ai-w5-1-b-datasheet.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
Battery_comm_Lose — Battery BMS communication lost.
Cause: Communication between the hybrid inverter and the battery BMS disconnected while 'BMS_Err-Stop' is active.
How to fix it
- 1Restore the BMS communication link (cable, pinout, protocol).
- 2If you do not want the inverter to stop on BMS loss, disable the 'BMS_Err-Stop' item on the LCD.
- 3If the fault still exists, contact Deye for help.
Source: gb-s12k-eu-gb-s15k-eugb-s20k-eu-gb-s15k-eu-gb-s20k-eu-manual.pdf, p.51 · gb-s5k-eu-gb-s20k-eu-datasheet.pdf, p.46