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Sungrow Alarm Codes; Consider This Your Ultimate Guide!

Collaborative by Collaborative
February 10, 2022
in Support, Inverters
0
Home Support

As one of the largest solar inverter manufacturers internationally, it’s understandable Sungrow alarm code possibilities are extensive. With this in mind, we’ve done our best to simplify the suite of possible Sungrow alarm codes and ensure you get your answers in the fastest way possible. Even though it’s possible to identify your particular Sungrow error codes in as little as 3 steps (see below), the amount of possible alarm codes become determined by your Sungrow inverter model.

For example, Sungrow single-phase hybrid inverters have extended alarm codes from the non-hybrid single and three-phase inverters due to the Battery side operations. These codes are beneficial for pinpointing the fault’s location and cause when a system includes battery storage. In contrast, three-phase hybrid inverters such as the SH5.0RT have their own set of alarm codes altogether. So, it is understandable to be confused when searching for the meaning behind a specific Sungrow alarm code when staring at a document. Therefore, we’ve divided up the sections of alarm codes corresponding to the appropriate Sungrow inverter for your convenience.

Find your Sungrow alarm code with ease, follow this process; 

1. Record the model make and the number (or numbers) displayed on the inverter. 

2. Jump to the relevant Sungrow alarm code selection using one of the buttons in the suitable table below. 

3. (example) if your Sungrow inverter is an “SG5K-D” model with an error code 002 displayed, tap the 0xx button in the relevant table below (section 1.), locate 002 and select the Alarm Code – #002 tab.

Need additional insight? Post your Sungrow alarm codes and related question within the comments at the bottom of this post.

1. Sungrow single-phase and three-phase inverter models SG2K-S / SG2K5-S / SG3K-S / SG3K-D / SG3K6-D / SG4K-D / SG4K6-D / SG5K-D / SG6K-D and Inverter side faults for single-phase hybrid models SH3K6-30 / SH4K6-30 / SH5K6-30. For other alarm codes regarding single-phase hybrid models SH3K6-30 / SH4K6-30 / SH5K6-30, the next table below refers to Battery side faults. Tap one of the below buttons to jump to your Sungrow alarm code. 

0xx
1xx
2xx
3xx
4xx
5xx
6xx
8xx
9xx

2.  Battery side faults for single-phase hybrid models SH3K6-30 / SH4K6-30 / SH5K6-30. Tap one of the below buttons to jump to your Sungrow alarm code. 

Battery side #7xx
Battery side #8xx
Battery side #9xx

3. Sungrow three-phase hybrid inverter models SH5.0RT / SH6.0RT / SH8.0RT / SH10RT. Tap one of the below buttons to jump to your Sungrow alarm code. 

00x
01x
02x
06x

Sungrow has earned a reputation for developing reliable inverter technology. Due to the evolution of today’s solar inverters and enhancements of their safety features, more often than not, an alarm code occurrence could be due to an external factor. These safety features are in place to protect the equipment within the system and the user from any critical harm.

The inverter must disconnect when external factors such as the grid operating outside its normal parameters to prevent equipment failure. In cases such as grid abnormality, the Sungrow inverter will reconnect once the grid returns to normal. If this alarm occurs frequently, it is best to contact your solar installer for a solution.

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#0xx

sungrow 1 & 3-phase (sg#k) inverters, 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #002

Description: Grid over-voltage. The grid voltage exceeds the protective value.

What to do: 1. Check the voltage of the grid. 2. If the grid voltage exceeds the permissible range of inverter protection parameters, ask utility grid company for solution. 3. If the grid voltage is within the permissible range, contact SUNGROW or you solar installer.

Alarm Code - #003

Description: Transient over-voltage. The grid transient voltage exceeds inverter allowable upper limit.

What to do: 1. This is a short-term fault due to grid condition. Wait a moment for inverter recovery. 2. If the fault persists, please contact SUNGROW or your solar installer.

Alarm Code - #004

Description: Grid under-voltage. The grid voltage is below the protective value.

What to do: 1. Check the grid voltage. 2. If the grid voltage exceeds the permissible range of inverter protection parameters, ask utility grid company for solution. 3. If the grid voltage is within the permissible range, contact SUNGROW or your solar installer.

Alarm Code - #005

Description: Grid under-voltage. The grid voltage is below the protective value, which is lower than the protective value of error 004.

What to do: 1. This is a short-term fault due to grid condition. Wait a moment for inverter recovery. 2. If the fault persists, please contact SUNGROW or your solar installer.

Alarm Code - #006

Description: AC over-current. The AC output current exceeds inverter allowable upper limit.

What to do: 1. The inverter will resume if the output current falls below the protection value. 2. If the fault persists, please contact SUNGROW or your solar installer.

Alarm Code - #007

Description: Transient AC overcurrent.

What to do: 1. The inverter will self-recover after several seconds. 2. If the fault persists, please contact SUNGROW or your solar installer.

Alarm Code - #008

Description: Grid over-frequency. The grid frequency exceeds the protective value.

What to do: 1. Check the grid frequency. 2. If the grid frequency exceeds the permissible range of inverter protection parameters, ask utility grid company for solution. 3. If the grid frequency is within the permissible range, contact SUNGROW or your solar installer.

Alarm Code - #009

Description: Grid under-frequency. The grid frequency is below the protective value.

What to do: 1. Check the grid frequency. 2. If the grid frequency exceeds the permissible range of inverter protection parameters, ask utility grid company for solution. 3. If the grid frequency is within the permissible range, contact SUNGROW or your solar installer.

Alarm Code - #010

Description: Grid failure (Islanding).

What to do: 1. Check whether AC circuit breaker is triggered. 2. Check whether AC cables are all firmly connected. 3. Check whether grid is not in service. 4. If all conditions are OK and this fault still occurs in the LCD screen, contact SUNGROW or your solar installer.

Alarm Code - #011

Description: DC injection over-current. The DC current injection of AC current exceeds the upper limit.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #012

Description: Leakage current over-current. The leakage current exceeds inverter allowable upper limit.

What to do: 1. Check the PV strings for ground fault. 2. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #013

Description: Grid abnormal. The grid voltage or frequency is out of the permissible range, and therefore the inverter cannot be connected to the grid.

What to do: Generally, the inverter will be reconnected to the grid after the grid recovers. If the alarm occurs frequently: 1. Measure the grid frequency, and contact the local utility grid company for solutions if the grid frequency exceeds the specified value. 2. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #014

Description: 10-minute grid over-voltage. The average grid voltage in 10 minutes exceeds the permissible range.

What to do: 1. Check whether the selected country code is correct. 2. Wait a moment for inverter recovery. 3. Check the voltage of the grid. If the grid voltage exceeds the permissible range of inverter protection parameters, ask utility grid company for solution. 4. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #015

Description: Grid over-voltage. The grid voltage exceeds the protective value, which is higher than the protective value of error 002.

What to do: 1. Check the model of the AC cables. 2. Wait a moment for inverter recovery. 3. If the grid voltage exceeds the permissible range, ask utility grid company for solution. 4. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #016

Description: The bus voltage or power is high.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #017

Description: Grid voltage unbalance. Unbalanced three-phase grid voltage is detected.

What to do: Generally, the inverter will be reconnected to the grid after the grid recovers. If the alarm occurs frequently: 1. Measure the grid voltage. If grid phase voltage differs greatly, contact the utility grid company for solutions. 2. If the voltage difference between the three phases is within the permissible range of the local utility grid company, modify the parameter setting through the App. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #019

Description: Bus transient over-voltage. The transient bus voltage exceeds inverter allowable upper limit.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #020

Description: Bus over-voltage. The bus voltage exceeds inverter allowable upper limit.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #021

Description: PV1 input over-current.

What to do: Check the layout and the wiring of PV1 input. Call your solar installer.

Alarm Code - #022

Description: PV2 input over-current.

What to do: Check the layout and the wiring of PV2 input. Call your solar installer.

Alarm Code - #024

Description: Neutral point voltage imbalance. The deviation of the neutral point voltage exceeds the allowable limit.

What to do: 1. The inverter will recover once the deviation falls below the protective limit. 2. Wait a moment for inverter recovery or restart the system. If the fault persists, call your solar installer.

Alarm Code - #024-025

Description: Device abnormal.

What to do: 1. Wait for the inverter to recover. 2. Disconnect the AC and DC switches or circuit breakers, and connect them again after 15 minutes. 3. If the alarm persists, contact SUNGROW or you solar installer.

Alarm Code - #028

Description: PV1 reverse connection.

What to do: Check the cable connections of PV1. Contact your solar installer.

Alarm Code - #029

Description: PV2 reverse connection.

What to do: Check the cable connections of PV2. Contact your solar installer.

Alarm Code - #030-034

Description: Device abnormal.

What to do: 1. Wait for the inverter to recover. 2. Disconnect the AC and DC switches or circuit breakers, and connect them again after 15 minutes. 3. If the alarm persists, contact SUNGROW or you solar installer.

Alarm Code - #036

Description: The temperature of radiator is too high.

What to do: 1. Check whether the ambient temperature shown on the screen is too high. Wait a moment for inverter recovery. 2. Check whether there is enough space for convection. 3. Check whether the inverter is in direct sunlight. 4. Check whether the fan is functioning. Replace it if necessary (-D series only). 5. Clean the air inlets. 6. If the fault persists, please contact SUNGROW or your solar installer.

Alarm Code - #037

Description: The internal temperature of inverter is too high.

What to do: 1. Check whether the ambient temperature shown on the screen is too high. Wait a moment for inverter recovery. 2. Check whether there is enough space for convection. 3. Check whether the inverter is in direct sunlight. 4. Check whether the fan is functioning. Replace it if necessary (-D series only). 5. Clean the air inlets. 6. If the fault persists, please contact SUNGROW or your solar installer.

Alarm Code - #038

Description: Relay fault on the grid side.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #039

Description: The insulation resistance of PV to earth is low. 

What to do: 1. Check whether there is a reliable inverter grounding line. 2. Check whether one of the PV strings is short-circuited with ground. 3. Wait a moment for inverter recovery. 4. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #040-042

Description: Device abnormal.

What to do: 1. Wait for the inverter to recover. 2. Disconnect the AC and DC switches or circuit breakers, and connect them again after 15 minutes. 3. If the alarm persists, contact SUNGROW or you solar installer.

Alarm Code - #041, 622

Description: Leakage current sampling fault.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #043

Description: Inner under-temperature fault. The ambient temperature inside the inverter is too low.

What to do: The inverter will recover once the ambient temperature rises above -25℃.

Alarm Code - #044

Description: Inverter self-test fault.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or solar installer.

Alarm Code - #045

Description: PV1 boost circuit fault.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or solar installer.

Alarm Code - #046

Description: PV2 boost circuit fault.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or solar installer.

Alarm Code - #047

Description: PV inputs error. The PV inputs order is incorrect.

What to do: Stop and disconnect the inverter. Contact your solar installer. Reset the PV inputs order.

Alarm Code - #048

Description: Phase current sampling fault.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or solar installer.

Alarm Code - #050

Description: Device abnormal.

What to do: 1. Wait for the inverter to recover. 2. Disconnect the AC and DC switches or circuit breakers, and connect them again after 15 minutes. 3. If the alarm persists, contact SUNGROW or you solar installer.

Alarm Code - #051

Description: Load overpower fault in the off-grid mode.

What to do: If the fault persists, contact your installer, disconnect some non-key loads.

Alarm Code - #052

Description: INV under-voltage fault in the off-grid mode.

What to do: Wait 5 minutes for inverter recovery or restart the system. 

Alarm Code - #053

Description: The slave DSP detect that the grid voltage exceeds inverter allowable upper limit.

What to do: 1. Check the grid voltage. 2. If the grid voltage exceeds the allowable range of inverter protection parameters, ask utility grid company for solution. 3. If the grid voltage is within the permissible range, contact SUNGROW or your solar installer.

Alarm Code - #054

Description: The slave DSP detects that the grid frequency exceeds inverter allowable upper limit.

What to do: 1. Check the grid frequency. 2. If the grid frequency exceeds the allowable range of inverter protection parameters, ask utility grid company for solution. 3. If the grid frequency is within the allowable range, contact SUNGROW or your solar installer.

Alarm Code - #056

Description: The slave DSP detects that the leakage current exceeds inverter allowable upper limit.

What to do: 1. Check whether there is a ground fault of the PV string. 2. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #059

Description: Communication alarm between master DSP and slave DSP.

What to do: 1. Wait 1 minute for inverter recovery. 2. If the fault persists, contact SUNGROW or you solar installer.

Alarm Code - #060

Description: Device abnormal.

What to do: 1. Wait for the inverter to recover. 2. Disconnect the AC and DC switches or circuit breakers, and connect them again after 15 minutes. 3. If the alarm persists, contact SUNGROW or you solar installer.

Alarm Code - #061

Description: Alarm for no inverter model setting.

What to do: Contact SUNGROW or you solar installer.

Alarm Code - #062

Description: DI fault of the backup box STB5K.

What to do: 1. Check whether the DI connection between the inverter and the backup box is correct. 2. Wait 5 minutes for inverter recovery.

Alarm Code - #063

Description: The version of CPLD (complex programmable logic device) cannot be detected.

What to do: Power off the system and program the CPLD.

Alarm Code - #064

Description: INV over-voltage fault in the off-grid mode.

What to do: Wait 5 minutes for inverter recovery or restart the system.

Alarm Code - #065

Description: INV under-frequency fault in the off-grid mode. (default value: 47 Hz)

What to do: Wait 5 minutes for inverter recovery or restart the system.

Alarm Code - #066

Description: INV over-frequency fault in the off-grid mode. (default value: 52 Hz)

What to do: Wait 5 minutes for inverter recovery or restart the system.

Alarm Code - #067

Description: Temporary grid over-voltage in the off-grid mode.

What to do: Wait 5 minutes for inverter recovery or restart the system.

Alarm Code - #070

Description: Fans are defective (-D series only).

What to do: Stop the inverter and disconnect the AC & DC cables. Check whether the fan duct has been blocked. If not, replace fans.

Alarm Code - #071

Description: SPD alarm AC.

What to do: Check the SPD, and replace it or the whole inverter if necessary. Contact SUNGROW or your solar installer.

Alarm Code - #072

Description: SPD alarm DC.

What to do: Check the SPD, and replace it or the whole inverter if necessary. Contact SUNGROW or your solar installer.

Alarm Code - #075

Description: RS485 communication error between two inverters in parallel.

What to do: 1. Check the RS485 cable connection. 2. Check whether the parallel settings of two inverters are enabled and they are set to master and slave respectively via the LCD menu. If fault persists contact SUNGROW or your solar installer.

Alarm Code - #076

Description: Device abnormal.

What to do: 1. Wait for the inverter to recover. 2. Disconnect the AC and DC switches or circuit breakers, and connect them again after 15 minutes. 3. If the alarm persists, contact SUNGROW or you solar installer.

Alarm Code - #078-079

Description: PV string abnormal.

What to do: 1. Check if the corresponding PV string needs to be connected first. If not, ignore the alarm. If so, check whether it is connected reliably. 2. Check if the DC fuse, if necessary, belonging to the PV string is damaged. If so, replace the fuse. 3. If the alarm persists, contact SUNGROW or your solar installer. *The alarm ID 078 and ID 079 are corresponding to PV 1 to PV 2 respectively.

Alarm Code - #083

Description: Fan2 abnormal speed warning.

What to do: 1. Check if the fan is blocked. 2. Restart the system.

Alarm Code - #084

Description: Warning for reverse cable connection of the Energy Meter.

What to do: 1. Check whether the power cable connections are correct. 2. If “Existing Inverter” is set to “ON” via LCD menu, check and ensure that its rated power is correctly set. 3. For single-phase Energy Meter, check whether the CT clamp of the 1-phase sensor is correctly placed.

Alarm Code - #085

Description: Mismatched software version.

What to do: Contact SUNGROW.

Alarm Code - #087

Description: AFCI abnormal: Arc fault detection module abnormal.

What to do: The inverter can operate normally. 1. Check whether the related cable connection and terminals are abnormal, and check whether the ambient environment is abnormal. If so, take corrective measures. 2. If the alarm persists, contact SUNGROW or solar installer.

Alarm Code - #088

Description: Arc fault.

What to do: 1. Disconnect the DC inputs and check whether DC cables are damaged, whether the wiring terminals or fuses, if necessary, are loose or in poor contact, and whether there is PV module burnt. If so, take corresponding corrective measures. 2. After taking corresponding measures in step 1, reconnect the DC inputs. Remove the arc fault through the App, and therefore the inverter will recover. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #089

Description: AFCI function disabled.

What to do: 1. Enable the AFCI function through the App, and therefore the inverter will recover. 2. If the alarm persists, contact SUNGROW or your solar installer.

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#1xx

sungrow 1 & 3-phase (sg#k) inverters, 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #100

Description: The AC output current exceeds the upper limit.

What to do: 1. The inverter will resume if the output current falls below the protection value. 2. If the fault persists, please contact SUNGROW or your solar installer.

Alarm Code - #101

Description: Grid over-frequency. The grid frequency exceeds the protective value, which is higher than the protective value of error 008.

What to do: 1. Check the grid frequency. 2. If the grid frequency exceeds the permissible range of inverter protection parameters, ask utility grid company forsolution. 3. If the grid frequency is within the permissible range, contact SUNGROW or your solar installer.

Alarm Code - #102

Description: Grid under-frequency. The grid frequency is below the protective value, which is lower than the protective value of error 009.

What to do: 1. Check the grid frequency. 2. If the grid frequency exceeds the permissible range of inverter protection parameters, ask utility grid company forsolution. 3. If the grid frequency is within the permissible range, contact SUNGROW or your solar installer.

Alarm Code - #105

Description: SPI auto test fault (for Italy only)

What to do: 1. Restart the system and re-do the auto test if necessary. 2. If the fault persists, please contact SUNGROW for a solution.

Alarm Code - #106

Description: Abnormal grounding. Neither the PE terminal on the AC connection block nor the second PE terminal on the enclosure is reliably connected.

What to do: Check whether there is a reliable inverter grounding line, if there is access to the ground, and the fault persists, please contact SUNGROW or your solar installer.

Alarm Code - #107

Description: DC injection over-voltage fault in the off-grid mode. The DC injection of INV voltage exceeds the upper limit.

What to do: The inverter will recover once the DC injection voltage falls below the recovery value.

Alarm Code - #113

Description: Temporary bypass overcurrent.

What to do: 1. Check whether the power of emergency loads exceeds the upper limit of the BACKUP port. 2. Wait a moment for inverter recovery or restart the system. 3. If the error persists, please contact SUNGROW or your solar installer for a solution.

Alarm Code - #116-117

Description: Device abnormal

What to do: 1. Wait for the inverter to recover. 2. Disconnect the AC and DC switches or circuit breakers, and connect them again after 15 minutes. 3. If the alarm persists, contact SUNGROW or your solar installer.

#2xx

sungrow 1 & 3-phase (sg#k) inverters, 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #200

Description: Bus hardware over-voltage fault. The bus voltage exceeds the protective value.

What to do: 1. Wait for inverter recovery after bus voltage lower. 2. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #201

Description: The bus voltage is too low.

What to do: 1. Wait a moment for inverter recovery. 2. If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #202

Description: PV hardware over-current fault. The PV1 or PV2 current exceeds the protective value.

What to do: If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #203

Description: The PV input voltage exceeds the bus voltage.

What to do: Check the functionality of the PV connection terminals. Contact your solar installer.

Alarm Code - #204

Description: PV1 boost short-circuit fault.

What to do: The inverter may be damaged. Contact SUNGROW for a solution.

Alarm Code - #205

Description: PV2 boost short-circuit fault.

What to do: The inverter may be damaged. Contact SUNGROW for a solution.

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#3xx

sungrow 1 & 3-phase (sg#k) inverters, 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #300

Description: INV over-temperature fault.

What to do: 1. Check and clean the heat sink. 2. Check whether the inverter is installed in sunlight or the ambient temperature of the enclosure exceeds 45℃…60℃. 3. Restart the system.

Alarm Code - #302

Description: PV insulation resistance fault. PV insulation resistance fault.

What to do: 1. Check whether the PV cable connection is intact. 2. Wait for a sunny day to check whether the system can run well. If fault persists contact your solar installer.

Alarm Code - #303

Description: Bypass relay fault.

What to do: 1. Wait 5 minutes for the inverter to recover or restart the system. 2. If the error persists, contact SUNGROW or your solar installer.

Alarm Code - #304

Description: Off-grid relay fault.

What to do: 1. Wait 5 minutes for the inverter to recover or restart the system. 2. If the error persists, contact SUNGROW or your solar installer.

Alarm Code - #306

Description: Input and output power mismatching fault.

What to do: If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #308

Description: Slave DSP redundant fault.

What to do: Restart the system. If fault persists, contact SUNGROW or our solar installer.

Alarm Code - #309

Description: Phase voltage sampling fault.

What to do: Restart the system. If fault persists, contact SUNGROW or our solar installer.

Alarm Code - #312

Description: DC injection sampling fault.

What to do: Restart the system. If fault persists, contact SUNGROW or our solar installer.

Alarm Code - #315

Description: PV1 current sampling fault.

What to do: Channel sampling anomaly. Contact SUNGROW or your solar installer.

Alarm Code - #316

Description: PV2 current sampling fault.

What to do: Channel sampling anomaly. Contact SUNGROW or your solar installer.

Alarm Code - #317

Description: PV1 MPPT current sampling fault.

What to do: Restart the system. If fault persists, contact SUNGROW or our solar installer.

Alarm Code - #318

Description: PV2 MPPT current sampling fault.

What to do: Restart the system. If fault persists, contact SUNGROW or our solar installer.

Alarm Code - #319

Description: System power supply failure fault.

What to do: Restart the system. If fault persists, contact SUNGROW or our solar installer.

Alarm Code - #320

Description: Leakage current sensor fault.

What to do: Contact SUNGROW or your solar installer.

Alarm Code - #321

Description: SPI communication failure. Communication faults between the master DSP and the slave DSP.

What to do: Restart the system. If fault persists, contact SUNGROW or our solar installer.

Alarm Code - #322

Description: Master DSP communication fault.

What to do: Restart the system. If fault persists, contact SUNGROW or our solar installer.

#4xx

sungrow 1 & 3-phase (sg#k) inverters, 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #401-408

Description: Permanent faults.

What to do: Restart the system. If fault persists, contact SUNGROW or our solar installer.

Alarm Code - #409

Description: All temperature sensors fail.

What to do: If the fault occurs repeatedly, contact SUNGROW or your solar installer.

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#5xx

sungrow 1 & 3-phase (sg#k) inverters, 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #501

Description: FRAM1 reading warning, External memory reading/writing warning.

What to do: 1. Inverter can normally be connected to the grid. 2. Restart the system. If the fault persists, contact SUNGROW or your solar installer.

Alarm Code - #503, 506, 511

Description: Ambient temperature sensor open circuit warning.

What to do: If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #504

Description: Ambient temperature sensor short circuit warning.

What to do: If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #505

Description: Radiator temperature sensor open circuit warning.

What to do: If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #506

Description: Radiator temperature sensor short circuit warning.

What to do: If the fault occurs repeatedly, contact SUNGROW or your solar installer.

Alarm Code - #507

Description: Error alarm of DO power settings.

What to do: Modify the DO control power according to the load power. Refer to “Optimised Control” in the user manual.

Alarm Code - #509

Description: Clock reset fault.

What to do: Manually reset the clock or synchronise the clock with the network time. This will clear the fault.

Alarm Code - #510

Description: PV over-voltage fault.

What to do: 1. Contact your solar installer and check whether the configuration of the PV array exceeds the permissible range of the inverter. 2. Wait a moment for inverter recovery or restart the system.

Alarm Code - #513

Description: Fan1 abnormal speed warning.

What to do: 1. Check if the fan is blocked. 2. Restart the system.

Alarm Code - #514

Description: Abnormal communication warning of the Energy Meter. (Inverter can be normally connected to the grid.)

What to do: 1. Check whether the power cable connections of the meter are correct. 2. Check whether the RS485 connection is correct. If the fault persists, contact your solar installer.

Alarm Code - #532-535

Description: String x reverse connection.

What to do: 1. Check whether the corresponding string is of reverse polarity. If so, disconnect the DC switch and adjust the polarity when the solar radiation is low and the string current drops below 0.5A. 2. If the fault persists, contact SUNGROW or solar installer. *The ID 532 to ID 535 is corresponding to string 1 to string 4 respectively.

Alarm Code - #548-551

Description: Abnormal PV string current.

What to do: 1. Check whether there is PV module shaded. If so, remove the shade and ensure the PV module is clean. 2. Check the whether the PV module is in abnormal aging. 3. If the alarm persists, contact SUNGROW or solar installer. *The alarm ID 548 to ID 551 is corresponding to string 1 to string 4, if necessary, respectively.

#6xx

sungrow 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #600

Description: Temporary BDC charging over-current fault.

What to do: Wait a moment for system recovery or restart the system.

Alarm Code - #601

Description: Temporary BDC discharging over-current fault.

What to do: Wait a moment for system recovery or restart the system.

Alarm Code - #602

Description: Clamping capacitor under-voltage fault.

What to do: 1. Check the cable connection of the battery. 2. Wait a moment for system recovery or restart the system.

Alarm Code - #603

Description: Temporary clamping capacitor over-voltage fault.

What to do: Wait a moment for system recovery or restart the system.

Alarm Code - #608

Description: BDC circuit self-check fault.

What to do: Wait a moment for system recovery or restart the system.

Alarm Code - #612

Description: BDC over-temperature fault.

What to do: 1. Check and clean the heat sink. 2. Check whether the inverter is installed in sunlight or the ambient temperature of the enclosure exceeds 45℃. 3. Restart the system.

Alarm Code - #616

Description: BDC hardware over-current fault.

What to do: The system will resume once the battery charge/discharge current falls below the upper limit or restart the system.

Alarm Code - #620

Description: BDC current sampling fault.

What to do: Wait a moment for system recovery or restart the system.

Alarm Code - #623

Description: Slave DSP communication fault.

What to do: Wait a moment for system recovery or restart the system.

Alarm Code - #624

Description: BDC soft-start fault.

What to do: Wait a moment for system recovery or restart the system.

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#8xx

sungrow 1-phase hybrid (sh#k) inverter ALARM CODES.

Alarm Code - #800, 802, 804, 807

Description: BDC internal permanent faults.

What to do: Restart the system. If faults persist, contact SUNGROW.

#9xx

sungrow 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #900, 901

Description: BDC temperature sensor warnings.

What to do: 1. Check and clean the heat sink. 2. Check whether the inverter is installed in sunlight or the ambient temperature of the enclosure exceeds 45℃. 3. Restart the system.

Alarm Code - #906

Description: Transformer direction recognition error.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Wait a moment for system recovery or restart the system.

Alarm Code - #910

Description: FRAM2 warning.

What to do: Restart the inverter.

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#7xx

Battery Side; sungrow 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #703

Description: Battery average under-voltage fault.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Wait a moment for system recovery or restart the system.

Alarm Code - #707

Description: Battery over-temperature fault.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the ambient temperature of the battery location. 3. Wait a moment for system recovery or restart the system.

Alarm Code - #708

Description: Battery under-temperature fault.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the ambient temperature of the battery location. 3. Wait a moment for system recovery or restart the system.

Alarm Code - #711

Description: Instantaneous battery over-voltage.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Wait a moment for system recovery or restart the system.

Alarm Code - #712

Description: Battery average over-voltage fault.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Wait a moment for system recovery or restart the system.

Alarm Code - #714

Description: Abnormal communication between battery and the hybrid inverter.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the battery type and communication connection. For lead-acid batteries, you should manually set the battery type. 3. Wait a moment for system recovery or restart the system.

Alarm Code - #715

Description: Battery hardware over-voltage fault.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Wait a moment for system recovery or restart the system.

Alarm Code - #732

Description: Battery over-voltage protection.

What to do: 1. The inverter can normally be connected to the grid. Charge has stopped but discharge is allowed. 2. Wait a moment for system recovery.

Alarm Code - #733

Description: Battery over-temperature protection.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the ambient temperature of the battery location. 3. Wait a moment for system recovery or restart the system.

Alarm Code - #734

Description: Battery under-temperature protection.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the ambient temperature of the battery location. 3. Wait a moment for system recovery or restart the system.

Alarm Code - #735

Description: Battery charging/discharging over-current protection.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Wait a moment for system recovery or restart the system.

Alarm Code - #739

Description: Battery under-voltage protection.

What to do: 1. The inverter can normally be connected to the grid. Discharge has stopped but charge is allowed. 2. Wait a moment for system recovery or restart the system.

#8xx

Battery Side; sungrow 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #832

Description: Battery FET fault or electrical switch failure.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the battery port voltage and the battery communication cable connection. 3. Force a shutdown and restart the inverter and battery system. 4. Wait a moment for system recovery or restart the system.

Alarm Code - #834

Description: Battery charging/discharging over-current permanent fault.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the battery port voltage and the battery communication cable connection. 3. Force a shutdown and restart the inverter and battery system. 4. Wait a moment for system recovery or restart the system.

Alarm Code - #836

Description: ID competing failure.

What to do: Restart the system, if the fault persists, please contact SUNGROW for a solution.

Alarm Code - #839

Description: Mismatched software version.

What to do: Contact SUNGROW for a solution.

Alarm Code - #844

Description: Software self-verifying failure.

What to do: Restart the system, if the fault persists, contact SUNGROW for a solution.

Alarm Code - #864

Description: Battery cell over-voltage fault.

What to do: 1. The inverter can normally be connected to the grid but charge / discharge has stopped. 2. Wait a moment for system recovery or restart the system.

Alarm Code - #866

Description: Battery pre-charge voltage fault.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the battery port voltage and the battery communication cable connection. 3. Force a shutdown and restart the inverter and battery system. 4. Wait a moment for system recovery or restart the system.

Alarm Code - #867

Description: Battery under-voltage fault.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the battery port voltage and the battery communication cable connection. 3. Force a shutdown and restart the inverter and battery system. 4. Wait a moment for system recovery or restart the system.

Alarm Code - #868

Description: Battery cell voltage imbalance fault.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the battery port voltage and the battery communication cable connection. 3. Force a shutdown and restart the inverter and battery system. 4. Wait a moment for system recovery or restart the system.

Alarm Code - #870

Description: Battery cable connection fault.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the battery port voltage and the battery communication cable connection. 3. Force a shutdown and restart the inverter and battery system. 4. Wait a moment for system recovery or restart the system.

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#9xx

Battery Side; sungrow 1-phase hybrid (sh#k) Alarm codes.

Alarm Code - #909

Description: Low SOH (State of Health) warning.

What to do: 1. The inverter can normally be connected to the grid and the charge/discharge function is normal. 2. Batteries are beyond the scope of the warranty. It is recommended to contact the distributor for replacements.

Alarm Code - #932

Description: Battery over-voltage warning.

What to do: 1. The inverter can normally be connected to the grid. Charge has stopped but discharge is allowed. 2. The system will resume after a certain time of discharging.

Alarm Code - #933

Description: Battery over-temperature warning.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the ambient temperature of the battery location. 3. Wait a moment for system recovery or restart the system.

Alarm Code - #934

Description: Battery under-temperature warning.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Check the ambient temperature of the battery location. 3. Wait a moment for system recovery or restart the system.

Alarm Code - #935

Description: Battery charging/discharging over-current warning.

What to do: 1. The inverter can normally be connected to the grid but charge/discharge has stopped. 2. Wait a moment for system recovery or restart the system.

Alarm Code - #937

Description: Battery tray voltage imbalance warning.

What to do: 1. The inverter can normally be connected to the grid and the charge/discharge functions are normal. 2. Check whether the cable connection of the battery is correct.

Alarm Code - #939

Description: Battery under-voltage warning.

What to do: 1. The inverter can normally be connected to the grid. Discharge has stopped but charge is allowed. 2. The system will resume after a certain time of charging.

Alarm Code - #964

Description: Battery internal warning.

What to do: Consult the battery manufacturer for a solution.

#00x

sungrow 3-phase hybrid (sh#rt) Alarm codes.

Alarm Code - #001

Description: Grid overvoltage.

What to do: Generally, the inverter will be reconnected to the grid after the grid recovers. If the alarm occurs frequently: 1. Measure the grid voltage, and contact the local utility grid company for solutions if the grid voltage exceeds the specified value. 2. Check, through the App, whether the protection parameters are appropriately set. 3. Check whether the cross-sectional area of the AC cable meets the requirement. 4. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #002

Description: Grid under-voltage.

What to do: Generally, the inverter will be reconnected to the grid after the grid recovers. If the alarm occurs frequently: 1. Measure the grid voltage, and contact the local utility grid company for solutions if the grid voltage is below the specified value. 2. Check, through the App, whether the protection parameters are appropriately set. 3. Check whether the AC cable is firmly in place. 4. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #003

Description: Grid over-frequency.

What to do: Generally, the inverter will be reconnected to the grid after the grid recovers. If the alarm occurs frequently: 1. Measure the grid frequency, and contact the local utility grid company for solutions if the grid frequency is beyond the specified range. 2. Check, through the App, whether the protection parameters are appropriately set. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #004

Description: Grid under-frequency.

What to do: Generally, the inverter will be reconnected to the grid after the grid recovers. If the alarm occurs frequently: 1. Measure the grid frequency, and contact the local utility grid company for solutions if the grid frequency is beyond the specified range. 2. Check, through the App, whether the protection parameters are appropriately set. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #005

Description: No Grid.

What to do: Generally, the inverter will be reconnected to the grid after the grid recovers. If the alarm occurs frequently: 1. Check whether the grid supplies power reliably. 2. Check whether the AC cable is firmly in place. 3. Check whether the AC cable is correctly connected (whether the live wire and the N wire are in correct place). 4. Check whether the AC switch or circuit breaker is disconnected. 5. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #006

Description: Over-high leakage current.

What to do: 1. The alarm can be caused by poor sunlight or damp environment, and the inverter will be reconnected to the grid after the environment is improved. 2. If the environment is normal, check whether the AC and DC cables are well insulated. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #007

Description: Grid abnormal.

What to do: Generally, the inverter will be reconnected to the grid after the grid recovers. If the alarm occurs frequently: 1. Measure the grid frequency, and contact the local utility grid company for solutions if the grid frequency exceeds the specified value. 2. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #008

Description: Grid voltage unbalance.

What to do: Generally, the inverter will be reconnected to the grid after the grid recovers. If the alarm occurs frequently: 1. Measure the grid voltage. If grid phase voltage differs greatly, contact the utility grid company for solutions. 2. If the voltage difference between the three phases is within the permissible range of the local utility grid company, modify the parameter setting through the App. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #009

Description: PV reverse connection fault.

What to do: 1. Check whether the corresponding string is of reverse polarity. If so, disconnect the DC switch and adjust the polarity when the solar radiation is low and the string current drops below 0.5A. 2. Check whether PV strings connected to the same MPPT have the same number of PV modules. If not, take corrective measures. 3. If the alarm persists, contact SUNGROW or your solar installer.

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#01x

sungrow 3-phase hybrid (sh#rt) Alarm codes.

Alarm Code - #010

Description: PV reverse connection alarm.

What to do: 1. Check whether the corresponding string is of reverse polarity. If so, disconnect the DC switch and adjust the polarity when the solar radiation is low and the string current drops below 0.5A. 2. Check whether PV strings connected to the same MPPT have the same number of PV modules. If not, take corrective measures. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #011

Description: PV abnormal alarm.

What to do: 1. Check whether there is PV module shaded. If so, remove the shade and ensure the PV module is clean. 2. Check the whether the PV module is in abnormal aging. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #012

Description: High ambient temperature.

What to do: 1. Check whether the inverter is directly exposed to sunlight. If so, take some shading measures. 2. Check and clean the air ducts. 3. Check whether the sub-alarm ID 070 (fan alarm) occurs through the App. If so, replace the faulty fan. 4. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #013

Description: Low ambient temperature.

What to do: Stop and disconnect the inverter. Restart the inverter when the ambient temperature is within the permissible range.

Alarm Code - #014

Description: Low ISO resistance.

What to do: Wait for the inverter to recover. If the fault occurs frequently: 1. Check whether the insulation resistance protection value is extremely large through the App, and ensure that it complies with the local regulations. 2. Check the resistance to ground from the PV module/cable. Take corrective measures in case of leading to short circuit or damaged insulation layer. 3. If the cable is normal and the alarm occurs on rainy days, check it again when the weather turns fine. 4. If the fault occurs on a cloudy day without rain but there is stagnant water or vegetation on site, clear the water and vegetation. If the fault persists, check it again when the weather turns fine. 5. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #015

Description: Grounding cable fault.

What to do: 1. Check whether the AC cable is correctly connected. 2. Check whether the grounding cable and wire cores are wrongly insulated. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #016

Description: Arc fault.

What to do: 1. Disconnect the DC inputs and check whether DC cables are damaged, whether the wiring terminals or fuses, if necessary, are loose or in poor contact, and whether there is PV module burnt. If so, take corresponding corrective measures. 2. After taking corresponding measures in step 1, reconnect the DC inputs. Remove the arc fault through the App, and therefore the inverter will recover. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #017

Description: Off-grid load overpower.

What to do: 1. Reduce the power of loads connected at the off-grid port, or remove some loads. 2. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #018

Description: Reverse Smart Energy Meter connection.

What to do: 1. Check whether the polarity of the Smart Energy Meter is reversed according to the prints on the cable connection port, and correct the connection if necessary. 2. Check whether the Smart Energy Meter is connected to a wrong terminal, instead of the grid connected point. If so, correct it. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #019

Description: Smart Energy Meter communication error.

What to do: 1. Check whether the Smart Energy Meter communication cable and terminal are abnormal. If so, remove the corresponding abnormality. 2. Reconnect the Smart Energy Meter communication cable. 3. If the alarm persists, contact SUNGROW or your solar installer.

#02x

sungrow 3-phase hybrid (sh#rt) Alarm codes.

Alarm Code - #020

Description: Grid confrontation.

What to do: 1. Check whether the AC output port is connected to the actual grid. If so, disconnect it. 2. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #021

Description: Parallel communication alarm.

What to do: 1. Check whether the communication cable and corresponding wiring terminal are abnormal. If so, take corrective measures to ensure reliable connection. 2. Reinstall the Smart Energy Meter communication cable. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #022

Description: BMS communication error.

What to do: 1. Check whether the communication cable and corresponding wiring terminal are abnormal. If so, take corrective measures to ensure reliable connection. 2. Reinstall the Smart Energy Meter communication cable. 3. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #023

Description: Battery polarity reversed.

What to do: 1. Check the battery for polarity correctness, and correct it if necessary. 2. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #024

Description: Battery alarm.

What to do: Generally, the battery can automatically recover. In case the alarm persist for a long time: 1. If the alarm is caused by ambient temperature, such as over temperature alarm or low temperature alarm, take measures to change the ambient temperature, such as improving heat dissipation conditions. 2. If the fault persists, contact battery manufacturer.

Alarm Code - #025

Description: Battery abnormal.

What to do: 1. In case of abnormal battery voltage, check whether the battery real-time voltage is abnormal. If so, contact the battery manufacturer. If not, contact SUNGROW. 2. In case of abnormal battery temperature, take measures to change the ambient temperature, such as improving heat dissipation conditions. 3. If the fault persists, contact battery manufacturer.

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#06x

sungrow 3-phase hybrid (sh#rt) Alarm codes.

Alarm Code - #063

Description: System alarm.

What to do: The inverter can operate normally. 1. Check whether the related cable connection and terminals are abnormal, and check whether the ambient environment is abnormal. If so, take corrective measures. 2. If the alarm persists, contact SUNGROW or your solar installer.

Alarm Code - #064

Description: System fault.

What to do: 1. Wait for the inverter to recover. 2. Disconnect the AC and DC switches or circuit breakers, and connect them again after 15 minutes. 3. If the alarm persists, contact SUNGROW or your solar installer.

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Reference.

Like most inverter manufacturers, it can be a little tricky to navigate the manufacturers own material. Hopefully, we’ve made things a little easier using the power of modern age search! We must however ensure credit where credit is due;

  • Sungrow global download centre (external site).
  • Sungrow single-phase manual.
  • Sungrow single-phase manual (alt).
  • Sungrow single-phase hybrid manual.
  • Sungrow three-phase hybrid manual.
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