Support For Installers | Livoltek

Support For Installers

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LIVOLTEK places a high value on relationships with our partners around the world. If you encounter any problems during the distribution or installation of our products, please feel free to contact us and we will arrange for our local technical teams to assist you as soon as possible.

Here you can find some useful tips before installing our products, as well as the most common problems you may encounter during troubleshooting.

Tips

What is needed to pay attention to for the first installation?

After the battery is installed for the first time, you are advised to charge the battery forcibly (for calibration Battery).

How to ensure the waterproofness of the machine?

1)Tighten the cable gland

2)Idle interfaces are sealed

3)The cable entry cover is closed

4)Conduit sealing treatment

5)Confirm and lock the waterproof cap

How to choose EPS mode?

There are 4 types of EPS modes, they are:
0 – Disable
1 – EPS without bypass:only in the case of power failure, EPS port will have voltage output (basically no standby power consumption)
2 – EPS with bypass:When there is power grid, EPS port will also have voltage output, and when power failure, EPS port voltage will need about 2s for output switch (low power standby power consumption).
3 – UPS with bypass:EPS port also has voltage output when there is power grid, and UPS mode output when power failure, EPS port voltage needs <20ms time for switching (high power standby power consumption)

How to prevent incorrect or misconnected DC cables from being crimped?

1) Do a good job of line marking to reduce the probability of
errors
2) Before connecting to the inverter, use a multimeter to measure the input voltage of the component on the positive and negative sides to ensure that the polarity is correct and does not exceed the maximum input voltage
3) Use special crimping tools for photovoltaic terminals
4) If conditions permit, you can use an infrared thermal imager or a spot temperature gun to confirm the connection point temperature after grid-connected power generation.

What are the requirements for machine installation?

Vertical installation/ Do not allow lying down/ Leaning back and inversion

FAQ

How to Ensure AC Cables and Terminals Are Not Reliably Connected?

1)Make sure to use terminal blocks for lock wire
2)Make sure the terminals are locked
3)Do not lock the screw to the cable insulation

What kind of installation mode does the inverter have?
Wall Mount and Bracket Mount
What are the requirements for machine installation?
Vertical installation/ Do not allow lying down/ Leaning back and inversion
What are the requirements for DC wiring?

1) When connecting photovoltaic modules to the inverter, the Amphenol H4 photovoltaic special connector provided with the inverter should be used. Compatible models may not guarantee long-term effective contact of metal terminals.
2) When crimping the positive metal terminal, do not also crimp the limit stop bar, otherwise the metal terminal will not be stuck, resulting in “heading”
3)Strictly prevent the reverse polarity of the DC input. It is forbidden to connect the single group in series in the same MPPT. Make sure that the terminal is correct before inserting the terminal into the inverter (it is recommended to use a multimeter to measure)

What are the specific requirements for AC wiring?

1)Pay attention to the correct connection of the neutral wire polarity
2)It is forbidden to connect the load to the output terminal of the inverter without passing through the circuit breaker;
3)Each inverter needs to be equipped with an independent circuit breaker to ensure safe disconnection from the grid
4)When using multiple single-strand cables for AC output, use fireproof mud to seal the gap between the sealing ring and the cable after wiring is completed.
5)When a large number of single-phase output inverters are connected to the same low-voltage transformer in the three-phase power grid, attention should be paid to the reasonable distribution of the inverters among the three phases, and the load balance of the three phases should be maintained as much as possible to avoid the failure of a certain phase due to insufficient consumption. The phase voltage rises and damages the electrical equipment;

Troubleshooting

1. On-grid Inverter

Product NameAlarm DefinitionProcessing Strategies
A00-Grid AC over voltageThe grid voltage exceeds the allowable range1. If the alarm occurs occasionally, it means the grid abnormal, the inverter can automatically recover to normal operating status after the grid return normal. 2. If the alarm occurs repeatedly and it can automatically recover, need to contact local electric power department to get permission to modify the inverter grid protection parameters with APP. 3. If the alarm occurs repeatedly for a long time, please confirm 1) If the output breaker is closed? 2)If the output terminal is ok? 3)If grid is power off? 4)If the output cable follow the User Manual guidance?
A01-Grid AC under voltage
A02-Grid AC absentThe grid voltage is 0 volt
A03-Grid AC over frequencyThe grid frequency exceeds the allowable range
A04-Grid AC under frequency
B00-PV DC over voltagePV module input voltage is higher than the allowable rangePlease measure the PV input voltage with multimeter, and compare it with the “Max input voltage” written the inverter lable. If PV input voltage is larger than “Max input voltage”, then reduce the PV module quantity.
B01-PV insulation abnormalThe insulation resistance against the ground is lower than the allowable range1. If the alarm occurs occasionally, it may be caused by external circuit, the inverter can automatically recover to normal operating status after the fault is cleared. 2. If the alarm occurs repeatedly or lasts a long time, please follow below steps: 1) Check if the output cable is stable. 2) Plug the PV strings one by one to find the abnormal PV strings. Please check if the insulation resistance against the ground of PV strings is too low, or the cable is broken, or cable connection incorrectly.
B02-Leakage current abnormalThe residual current is high.1. If the alarm occurs occasionally, it may be caused by external circuit, the inverter can automatically recover to normal operating status after the fault is cleared. 2. If the alarm occurs repeatedly or lasts a long time, please follow below steps: 1) Check if the output cable is stable. 2) Plug the PV strings one by one to find the abnormal PV strings. Please check if the insulation resistance against the ground of PV strings is too low, or the cable is broken, or cable connection incorrectly.
B03-PV string abnormalPV strings have been shielded for a long time or PV strings is abnormal1. Check whether the PV string is shielded. 2. If the PV string is clean and not shielded, check if the PV modules are aging or deteriorated, or if cable/terminal is abnormal.
B04-PV DC under voltagePV modules input voltage is under default protection value.1. If alarm occur during sunlight weak(At morning or dawn, raining or ), it’s normal and no action is needed. 2. If not, please check if there is PV module connection short circuit.
A06-Grid voltage unbalancedThe grid voltage unbalanced exceeds the allowable range1. If the alarm occurs occasionally, it means the grid abnormal, the inverter can automatically recover to normal operating status after the grid return normal. 2. If the alarm occurs repeatedly and it can automatically recover, need to contact local electric power department to get permission to modify the inverter grid protection parameters with APP. 3. If the alarm occurs repeatedly for a long time, please confirm 1) If the output breaker is closed? 2)If the output terminal is ok? 3)If grid is power off? 4)If the output cable follow the User Manual guidance?
C02-Output DC over currentGrid DC component current is higher than than the allowable range1. If the alarm occurs occasionally, it’s caused by grid voltage abnormal temporarily, the inverter can automatically recover to normal operating status, no action is needed. 2. If the alarm occurs repeatedly or lasts a long time, please contact customer service center.
C03-Inverter relay abnormalInternal relay abnormal1. If the alarm occurs occasionally, it’s caused by grid voltage abnormal temporarily, the inverter can automatically recover to normal operating status, no action is needed. 2. If the alarm occurs repeatedly or lasts a long time, please check if output neutral line and fire line reverse connection. If not, please contact customer service center.
C05-Inverter over temperatureInternal temperature is higher than than the allowable range1. If the alarm occurs occasionally, the inverter can automatically recover to normal operating status, no action is needed. 2. If the alarm occurs repeatedly or lasts a long time, please check if the installation site is direct sunlight, ventilation is good, the ambient temperature is too high. If not, please contact cusomer service center.
C06-Leakage current HCT abnormalResidual current device test is failure1. If the alarm occurs occasionally, it may be caused by external circuit abnormal, the inverter can automatically recover to normal operating status after fault is cleared. 2. If the alarm occurs repeatedly or lasts a long time, please check if the insulation resistance against the ground of PV strings is too low, or the cable is broken, or cable connection incorrectly.
B07-PV string reverseThe polar of PV strings  is reversed.Check whether the cables of PV strings are correctly connected. If they are connected reversely, reconnect the cables.
C08-Fan lockFan abnormal1. If the alarm occurs occasionally, please restart inverter. 2. If the alarm occurs repeatedly or lasts a long time, please check if fan is blocked. If not, please contact customer service center.

Energy Storage System

1.Common Customer Complaints-Installation Stage

Earth fault: F2: 00000001

S/NProbable CauseRecommended Measure
1The inverter ground wire is not connected properly

1.Check the inverter ground wire connection.

2.Check the voltage between N&E, it should be under 30V; If it is over 30V,check the connection of the home ground wire

2The voltage between N&E is too high
3Inverter damagedReplace inverter

Meter Communication Failure: F3: 00000400

S/NProbable CauseRecommended Measure
1The meter cable is not connected or the connected communication port is wrongCheck the meter connection wire harness and ports
2Communication matching resistance is incorrectAdd matching resistance to the communication terminal of the meter
3Inverter meter type setting is incorrectCheck the meter type parameter settings
4The line sequence of the RJ45 head is incorrect or the line sequence of the communication port of the meter is incorrect.Check the color and line sequence of the meter communication line according to the user manual
5Bad meter communication harnessReplace the communication harness, UTP is recommended
6Meter damagedReplace meter
7The meter communication port of the inverter is damagedReplace meter
 

BMS communication failure: F3: 00004000

S/NProbable CauseRecommended Measure
1The BMS communication cable is not connected or the interface is incorrectly insertedCheck BMS wiring harness and connection ports
2Inverter battery type parameter is incorrectCheck inverter parameters
3Bad BMS communication harnessReplace the BMS communication harness, UTP is recommended
4Bad battery BMS communication portReplace battery
5Bad inverter BMS communication portReplace inverter

2.Common Customer Complaints—Utilization Stage

When switching between on-grid and off-grid, the switching time of EPS ports is too long, which cause power failure of some loads.

S/NProbable CauseRecommended Measure
1Inverter EPS mode setting is incorrectCheck the EPS mode setting. Setting 1 switching time is 2-3S, but the standby power consumption is the lowest, setting 2 switching time is about 1S, with bypass function, standby power consumption is low, setting 3 switching time 20ms, UPS function, standby power consumption average 50- 60W
2When the grid is powered off, it is just in the inverter grid connection stageUPS switching is not supported at this stage
3There are too many rectified loads and inductive loads in the home, which will cause prolonged on-grid switchingWhen there are too many rectifying loads and inductive loads, the switching time can last for 30ms, and some loads will lose power, especially some lamps.
4The EPS port is connected to an electrical appliance with an impulse starting current load, and exceeds the inverter load capacityEPS ports cannot be connected to loads with high impulse current, such as water pumps
 

PV does not generate power or generates little power

S/NProbable CauseRecommended Measure
1Weather reasonCheck historical data to see if it is weather reason
2Set 0 feed in, to meet no feed in logicCheck settings
3The system insulation resistance value is detected, but the inverter is in the standby state of connectionCheck whether the inverter connection is stopped at 1, and check whether the system insulation resistance value is less than 30K
4Inverter MPPT working mode parameter setting is incorrectCheck the MPPT working mode, it should set to 0
5The system working state is wrong or the bus voltage state is wrongConfirm whether the system is in PV working state 5 or 6, and check whether the bus voltage is normal, 400V, 450V, 440V. If the status is wrong, try to restart the inverter

Battery does not discharge

S/NProbable CauseRecommended Measure
1The current battery SOC has reached or is lower than the preset discharge cut-off SOC valueCheck the parameters
2The battery is not allowed to discharge, for example, the BMS allows the discharge current to be 0Check BMS information, confirm battery working status
3Inverter is set to backup mode or set to forced charging stateCheck the inverter working mode setting and ES control status, 1 is  self-use, 3 is forced charging, 5 is forced discharging
4The battery voltage is under 50VCheck if the battery voltage is under 50V
5The system working state is wrong or the bus voltage state is wrongConfirm whether the system is in the battery working state 3 or 6, and check whether the bus voltage is normal, 400V, 450V, 440V. If the status is wrong, check whether the battery port of the inverter has voltage or try to restart the inverter
6Inverter battery discharge circuit damagedReplace inverter

The battery does not charge

S/NProbable CauseRecommended Measure
1The inverter set forced dischargeConfirm the status of ES control, 1 is for self-use, 3 is forced charging, 5 is forced discharging
2The battery is not allowed to charge, the battery BMS allows the charging current to be 0Check BMS information to confirm battery working status
3When charging stopped, the battery voltage is over 53.5V and does not meet the conditions for rechargingCheck the battery history charging status, check the battery voltage curve
4In spontaneous self-use mode, the load is larger than the PV powerCheck the working status of the system to confirm whether it conforms to the working logic
5The system working state is wrong or the bus voltage state is wrongConfirm whether the system is in the battery working state 3 or 6, and check whether the bus voltage is normal, 400V, 450V, 440V. If the status is wrong, check whether the battery port of the inverter has voltage or try to restart the inverter
6The inverter charging circuit is damagedReplace Inverter
 

Bus overvoltage fault :F1: 80000400

S/NProbable CauseRecommended Measure
1Panel open circuit voltage is too highCheck and confirm the configuration of the panel, note the effect of temperature on the open circuit voltage of the panel
2In off-grid mode, some loads with short-term impulse current will triggerSome loads are not recommended to be connected to the EPS port, such as water pumps. If they must be connected, a soft starter needs to be added.
3In the case of weak grid, the inverter control loop oscillatesNeed to adjust software PI parameters
4When in multiple machines parallel mode, the inverter is disturbedTry to add an inductor at the grid end
5Inverter damagedReplace inverter

Overcurrent fault F1: 18004800

S/NProbable CauseRecommended Measure
1Some special loads will cause the inverter to report overcurrent, such as water pumps, washing machines, etc.Try to add inductance at the grid end, soft start and other measures
2When in multiple machines parallel mode, the inverter is disturbed and causes vibrationTry  to add an inductor at the grid end
3Inverter hardware damageReplace inverter

Grid-connected relay failure: F2: 00000010

S/NProbable CauseRecommended Measure
1The inverter is disturbed by the gridTry to restart the inverter, some old hardware version inverters can try to add an inductor on the grid side to solve the problem
2There is a problem with the relay control circuit
3Grid end cement resistance failureThe cement resistance can be skipped by setting the parameter. Reserved 1 is set to 1 to not use the cement resistance, and set to 0 to use the cement resistance.
 

Contact Form

Dear users, if you encounter any problems during the use or installation of Livoltek products, you are welcome to fill in the contact form below.

Our after-sales engineers will help you to solve the problem the first time.

Pakistan

ADD|House no. 95-E1, Gulberg III, Lahore, Pakistan

TEL/WhatsApp/WeChat(Sales) |0314-7970183
EMAIL(Sales) |sales.pk@livoltek.com

Headquarter

ADD|1418-35 Moganshan Road, Hangzhou, 310011, China

 

TEL/WhatsApp/WeChat(Sale)|+86 157 1576 8455
EMAIL(Sales)|info@livoltek.com

 

TEL/WhatsApp/WeChat(Service)|+86 151 5718 2502
EMAIL(Service)|service@livoltek.com

Netherlands

ADD|Westeind 8A, 5245 NL, Rosmalen, Netherlands

 

TEL/WhatsApp/WeChat(Sale)|+86 157 1576 8455
EMAIL(Sales)|sales.eu@livoltek.com

 

TEL/WhatsApp/WeChat(Service)|+86 151 5718 2502
EMAIL(Service)|service.eu@livoltek.com

Pakistan

ADD|Office#5,7th Floor Shaheen, Complex, Egerton Road, Lahore

 

TEL/WhatsApp/WeChat(Sales) |+86 157 1576 8455
EMAIL(Sales) |sales.pk@livoltek.com

 

TEL/WhatsApp/WeChat(Service) |+86 157 1576 8455
EMAIL(Service) |service.pk@livoltek.com

Brazil

Eletraenergy.
ADD|Rodovia BR 116, km 16, 7698
Pedras, Eusébio, Ceará, 61760-000, Brazil

 

TEL/WhatsApp/WeChat(Sales) |+55(085)98115-1834 
EMAIL(Sales) |sales.br@livoltek.com

 

TEL(Service) |+55 11 93338-1338
EMAIL(Service) |suportebr@livoltek.com

South Africa

Hexing Electrical SA (Pty) Ltd.
ADD|82 Roan Crescent, Corporate Park North, Midrand, Johannesburg, South Africa

 

TEL/WhatsApp/WeChat(Sales)|+86 157 1576 8455
EMAIL(Sales)|sales.sa@livoltek.com

 

TEL(Service)|+27676848139
EMAIL(Service)|saservice@livoltek.com

Colombia

ADD|Cl. 99#10-08 Piso 7Bogotá, Colombia

 

TEL/WhatsApp/WeChat(Sales)|+57 311 8997451
EMAIL(Sales)|info@livoltek.com

 

TEL(Service)|+57 311 8997451
EMAIL(Service)|service@livoltek.com

Italy

LIVOLTEK ITALIA srl – via Ceradini 12 – 20129 Milano 

 

TEL/WhatsApp/WeChat(Sale)|+86 157 1576 8455
EMAIL(Sales)|info@livoltek.com

 

TEL/WhatsApp/WeChat(Service)|+86 151 5718 2502
EMAIL(Service)|service@livoltek.com

U.K.

55 Holloway Head, Birmingham B1 1HP, UK 

 

TEL/WhatsApp/WeChat(Sales)|+44 7597 587947
EMAIL(Sales)|info@livoltek.com

 

TEL(Service)tel:|+ 44 7597 587947 
EMAIL(Service)|service@livoltek.com