S SERIES 2250 Inverter User Manual

S SERIES 2250 Inverter

Product Information

• Product Name: S Series Inverter
• Models: S700, S1000, S1500, S2000, S2500, S3000, S3300
• Note: The S3300 model is for the Indian and Polish markets only.
• Important Notes:
  • This user manual provides instructions for the assembly, installation, commissioning, maintenance, and troubleshooting of the S Series Inverter.
  • The manual is intended for qualified personnel only and should be accessible at all times.
  • The manual includes safety instructions and general information indicated by specific symbols.
  • The inverter is compliant with CE guidelines and UK product safety certification requirements.
  • Caution should be exercised as the inverter can become hot during operation.
  • High voltages in the inverter can pose a danger to life and caution should be taken to avoid electric shock.
  • The residual voltage in the inverter needs 5 minutes to discharge before opening the upper lid or the DC lid.
  • Proper disposal of the product is required and it should not be treated as household waste.
• Safety:
  • The S Series Inverter is designed and tested in accordance with international safety requirements.
  • Qualified, trained personnel must carry out all operations including transport, installation, start-up, and maintenance.
  • Electrical installation and maintenance should be conducted by a licensed electrician following local wiring rules and regulations.
  • Before installation, check for any transport or handling damage that could affect insulation integrity or safety clearances.
  • Choose the installation location carefully and adhere to specified cooling requirements.
  • Unauthorized removal of necessary protections, improper use, incorrect installation, and operation may lead to serious safety hazards or equipment damage.

Product Usage Instructions

1. Read the Manual: Before using the inverter, carefully read the user manual to understand its assembly, installation, commissioning, maintenance, and troubleshooting procedures.
2. Installation :
   • Ensure that the inverter is free from any transport or handling damage before installation.
   • Choose a suitable location that adheres to specified cooling requirements.
   • Follow local wiring rules and regulations during electrical installation and maintenance.
   • Engage a licensed electrician to carry out the electrical installation.
3. Operation:
   • Familiarize yourself with the control panel and its functions as described in section 6.1 of the manual.
   • Refer to the function tree in section 6.2 for a comprehensive understanding of the inverter’s features and operations.
4. Safety Precautions:
   • Exercise caution as the inverter can become hot during operation. Avoid contact with hot surfaces.
   • Be aware of the danger of high voltages in the inverter. Take necessary precautions to avoid electric shock.
   • Allow the inverter to discharge residual voltage for 5 minutes before opening the upper lid or the DC lid.
5. Disposal:
   • The product should not be treated as household waste.
   • Follow proper disposal procedures as outlined in local regulations.

Note: For detailed instructions on assembly, installation, commissioning, maintenance, and troubleshooting, refer to the user manual provided with the product.

Important Notes

Scope
This manual describes the assembly, installation, commissioning, maintenance and troubleshooting of the following model(s) of Fox ESS products:

• S Series:
• S700 S1000 S1500 S2000 S2500 S3000 S3300*

Note: Please keep this manual where it will be accessible at all times. The S3300 model is for the Indian and Polish markets only.

Target Group
This manual is for qualified personnel only. The tasks described in this manual will need to be performed by professional, suitably qualified technicians only.

Symbols Used
The following types of safety instructions and general information appear in this document as described below:

| Danger!
“Danger” indicates a hazardous situation which, if not avoided, will result in death or serious injury.
---|---
| Warning!
“Warning” indicates a hazardous situation which, if not avoided, could result in death or serious injury.
| Caution!
“Caution” indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
| Note!
“Note” provides important tips and guidance.

Symbols Explanation
This section explains the symbols shown on the inverter and on the type label:

the applicable CE guidelines.
| This mark indicates compound UK product safety certification requirements.
| Beware of hot surface. The inverter can become hot during operation. Avoid contact during operation.
---|---
| Danger of high voltages.
Danger to life due to high voltages in the inverter!
| Danger. Risk of electric shock!
| Danger to life due to high voltage.
There is residual voltage in the inverter which needs 5 min to discharge. Wait 5 min before you open the upper lid or the DC lid.
| Read the manual.
| Product should not be disposed as household waste.
| PE conductor terminal

Safety

Appropriate Usage
S series inverter is designed and tested in accordance with international safety requirements. However, certain safety precautions must be taken when installing and operating this inverter. The installer must read and follow all instructions, cautions and warnings in this installation manual.

• All operations including transport, installation, start-up and maintenance, must be carried out by qualified, trained personnel.
• The electrical installation & maintenance of the inverter shall be conducted by a licensed electrician and shall comply with local wiring rules and regulations.
• Before installation, check the unit to ensure it is free of any transport or handling damage, which could affect insulation integrity or safety clearances. Choose the installation location carefully and adhere to specified cooling requirements. Unauthorized removal of necessary protections, improper use, incorrect installation and operation may lead to serious safety and shock hazards or equipment damage.
• Before connecting the inverter to the power distribution grid, contact the local power distribution grid company to get appropriate approvals. This connection must be made only by qualified technical personnel.
• Do not install the equipment in adverse environmental conditions such as in close proximity to flammable or explosive substances; in a corrosive environment; where there is exposure to extreme high or low temperatures; or where humidity is high.
• Do not use the equipment when the safety devices do not work or are disabled.
• Use personal protective equipment, including gloves and eye protection during the installation.
• Inform the manufacturer about non-standard installation conditions.
• Do not use the equipment if any operating anomalies are found. Avoid temporary repairs.
• All repairs should be carried out using only approved spare parts, which must be installed in accordance with their intended use and by a licensed contractor or authorized Fox ESS service representative.
• Liabilities arising from commercial components are delegated to their respective manufacturers.
• Any time the inverter has been disconnected from the public network, please be extremely cautious as some components can retain charge sufficient to create a shock hazard. Prior to touching any part of the inverter please ensure surfaces and equipment are under touch safe temperatures and voltage potentials before proceeding.

PE Connection and Leakage Current
PV System Residual Current Factors

• In every PV installation, several elements contribute to the current leakage to protective earth (PE). these elements can be divided into two main types.
• Capacitive discharge current – Discharge current is generated mainly by the parasitic capacitance of the PV modules to PE. The module type, the environmental conditions (rain, humidity) and even the distance of the modules from the roof can effect the discharge current. Other factors that may contribute to the parasitic capacitance are the inverter’s internal capacitance to PE and external protection elements such as lighting protection.
• During operation, the DC bus is connected to the alternating current grid via the inverter. Thus, a portion of the alternating voltage amplitude arrives at the DC bus. The fluctuating voltage constantly changes the charge state of the parasitic PV capacitor (i.e capacitance to PE). This is associated with a displacement current, which is proportional to the capacitance and the applied voltage amplitude.
• Residual current – if there is a fault, such as defective insulation, where an energized cable comes into contact with a grounded person, an additional current flows, known as a residual current.

Residual Current Device (RCD)

• All Fox ESS inverters incorporate a certified internal RCD (Residual Current Device) to protect against possible electrocution in case of a malfunction of the PV array, cables or inverter (DC). The RCD in the Fox ESS inverter can detect leakage on the DC side. There are 2 trip thresholds for the RCD as required by the DIN VDE 0126-1-1 standard. A low threshold is used to protect against rapid changes in leakage typical of direct contact by people. A higher threshold is used for slowly rising leakage currents, to limit the current in grounding conductors for the safety. The default value for higher speed personal protection is 30mA, and 300mA per unit for lower speed fire safety.

Installation and Selection of an External RCD device

• An external RCD is required in some countries. The installer must check which type of RCD is required by the specific local electric codes. Installation of an RCD must always be conducted in accordance with local codes and standards. Fox ESS recommends the use of a type-A RCD. Unless a lower value is required by the specific local electric codes, Fox ESS suggests an RCD value between 100mA and 300mA.
• In installations where the local electric code requires an RCD with a lower leakage setting, the discharge current might result in nuisance tripping of the external RCD. The following steps are recommended to avoid nuisance tripping of the external RCD:
  1. Selecting the appropriate RCD is important for correct operation of the installation. An RCD with a rating of 30mA may actually trip at a leakage as 15mA (according to IEC 61008). High quality RCDs will typically trip at a value closer to their rating.
  2. Configure the trip current of the inverter’ internal RCD to a lower value than the trip current of the external RCD. The internal RCD will trip if the current is higher than the allowed current, but because the internal inverter RCD automatically resets when the residual currents are low it saves the manual reset.

Surge Protection Devices (SPDs) for PV Installation

WARNING!

• Over-voltage protection with surge arresters should be provided when the PV power system is installed. The grid connected inverter is not fitted with SPDs in both PV input side and mains side.
• Lightning will cause damage either from a direct strike or from surges due to a nearby strike.
• Induced surges are the most likely cause of lightning damage in majority or installations, especially in rural areas where electricity is usually provided by long overhead lines. Surges may impact on both the PV array conduction and the AC cables leading to the building. Specialists in lightning protection should be consulted during the end use application. Using appropriate external lightning protection, the effect of a direct lightning strike into a building can be mitigated in a controlled way, and the lightning current can be discharged into the ground.
• Installation of SPDs to protect the inverter against mechanical damage and excessive stress include a surge arrester in case of a building with external lightning protection system (LPS) when separation distance is kept. To protect the DC system, surge suppression device (SPD type2) should be fitted at the inverter end of the DC cabling and at the array located between the inverter and the PV generator, if the voltage protection level (VP) of the surge arresters is greater than 1100V, an additional SPD type 3 is required for surge protection for electrical devices.
• To protect the AC system, surge suppression devices (SPD type2) should be fitted at the main incoming point of AC supply (at the consumer’s cutout), located between the inverter and the meter/distribution system; SPD (test impulse D1) for signal line according to EN 61632-1. All DC cables should be installed to provide as short a run as possible, and positive and negative cables of the string or main DC supply should be bundled together.
• Avoiding the creation of loops in the system. This requirement for short runs and bundling includes any associated earth bundling conductors. Spark gap devices are not suitable to be used in DC circuits once conducting; they won’t stop conducting until the voltage across their terminals is typically below 30 volts.

About Product

About S Series Inverter
S series inverters cover 0.7kW systems up to 3.3kW and are integrated with 1 MPP tracker with high efficiency and reliability.

Basic Features

• Advanced DSP control technology.
• Utilizes the latest high-efficiency power component.
• Optimal MPPT technology.
• Wide MPPT input range.
• Advanced anti-islanding solutions.
• IP65 protection level.
• Max. Efficiency up to 97.4%. EU efficiency up to 96.8%. THD<3%.
• Safety & Reliability: Transformerless design with software and hardware protection.
• Export limitation (CT/Meter/DRM0/ESTOP).
• Power factor regulation. Friendly HMI.
• LED status indications.
• LCD display technical data, human-machine interaction through touch key.
• PC remote control.

Terminals Introduction

Note: Only authorized personnel are permitted to set the connection.

Dimensions
For S Series:

Technical Data

DC Input

Model| S700| S1000| S1500| S2000| S2500| S3000| **S3300***
---|---|---|---|---|---|---|---
Max. recommended DC power [W]| 1050| 1500| 2250| 3000| 3750| 4500| 4950
Max. DC voltage [V]| 500| 500| 500| 500| 550| 550| 550
Nominal DC operating voltage[V]| 360| 360| 360| 360| 360| 360| 360
MPPT voltage range [V]| 50-500| 50-500| 50-500| 50-500| 50-550| 50-550| 50-550
MPPT voltage range @ full load [V]| 80-450| 110-450| 160-450| 210-450| 240-550| 280-550| 300-550
Max. input current [A]| 12.5
Max. short circuit current [A]| 15
Start output voltage [V]| 60
No. of MPP trackers| 1
Strings per MPP tracker| 1
DC switch| Optional

AC Output

Model| S700| S1000| S1500| S2000| S2500| S3000| **S3300***
---|---|---|---|---|---|---|---
Rated output power [W]| 700| 1000| 1500| 2000| 2500| 3000| 3300
Max. apparent AC power [VA]| 800| 1100| 1650| 2200| 2750| 3300| 3300
Rated grid voltage and range [V]| 220/230/240
Rated AC frequency and range [Hz]| 50/60
AC nominal current [A]| 3.0| 4.3| 6.5| 8.7| 10.9| 13.0| 14.3
Max. output fault current [A]| 3.5| 4.8| 7.2| 9.6| 12.0| 14.3| 14.3
THD| <3%
Displacement power factor| 1 (Adjustable from 0.8 leading to 0.8 lagging)
Feed in phase| Single-phase
Over voltage category| PV: OVC II Mains: OVC III

Efficiency, Safety and Protection

Model| S700| S1000| S1500| S2000| S2500| S3000| **S3300*
---|---|---|---|---|---|---|---
Max. MPPT efficiency| 99.00%| 99.00%| 99.00%| 99.00%| 99.00%| 99.00%| 99.00%
Euro efficiency| 96.50%| 96.50%| 96.50%| 96.80%| 96.80%| 96.80%| 96.80%
Max. efficiency| 97.20%| 97.20%| 97.30%| 97.40%| 97.40%| 97.40%| 97.40%
Safety & Protection**
DC reverse-polarity protection| Yes
Insulation monitoring| Yes
DC injection monitoring| Yes
AC short-circuit protection| Yes
Residual current detection| Yes
Anti-islanding protection| Yes
AC output overcurrent protection| Yes
AC output overvoltage protection| Yes

General Data

Model| S700| S1000| S1500| S2000| S2500| S3000| **S3300**
---|---|---|---|---|---|---|---
Dimensions (WHD) [mm]| 334350*115
Net weight [kg]| 7.8kg
Installation| Wall-mounted
Operating temperature range [°C]| -20…+60 (derating at 45)
Storage temperature [°C]| -40…+70
Storage/Operation relative humidity| 0%~100%, no condensation
Max. operating altitude| 3000m (derating when > 2000m)
Ingress protection| IP65 (for outdoor use)
Isolation type| Transformerless
Protective class| I
Night-time consumption| <1W
Pollution degree| II
Cooling| Natural
Noise level| <30dB
Monitoring module(optional)| External WiFi/GPRS
Communication| Meter/CT/DRM/RS485

India and Poland markets only.

Installation

Packing List
Please un-pack the box, check and make sure you received all items as listed below before installation (excluding optional items):

Object| Quantity| Description| Object| Quantity| Description
---|---|---|---|---|---
A| 1| Inverter| I| 1| Communication connector
B| 1| Bracket| J| 1| Product manual
C| 2| DC connector (F/M)| K| 1| Quick installation guide
D| 1| AC connector| L| 1| CT (Optional)
E| 2| Expansion tube| M| 1| WiFi/LAN/GPRS (Optional)
F| 2| Expansion screw| N| 1| Meter (Optional)
G| 2| DC pin contact (1positive, 1negative)| O| 2| Unlock tool
H| 1| Earth terminal| | |

Preparation

• Please refer to the Technical Data to make sure the environmental conditions fit the inverter’s requirements (degree of protection, temperature, humidity, altitude, etc.)
• Please avoid direct sunlight, rain exposure and snow build-up during installation and operation.
• To avoid overheating, always make sure the air flow around the inverter is not blocked.
• Do not install in places where gas or flammable substances may be present.
• Avoid electromagnetic interference that can compromise the correct operation of electronic equipment.
• The slope of the wall should be within ±5°.

Installation Space Required

Tools Required

• Manual wrench;
• Electric drill (drill bit set 8mm);
• Crimping pliers;
• Stripping pliers;
• Screwdriver.

Installation Steps
Step 1: Fix the bracket on the wall

• Choose the place you want to install the inverter. Place the bracket on the wall and mark the position of the 2 holes from bracket.
• Drill holes with electric drill, make sure the holes are at least 50mm deep, and then tighten the expansion tubes.
• Insert the expansion tubes into the holes and tighten them. Install the bracket with the expansion screws.

Step 2: Match the inverter with wall bracket
Hang the inverter over the bracket, slightly lower the inverter, and make sure the 2 mounting bars on the back are fixed with the 2 grooves from bracket properly.

Wiring Steps
Step 1: PV String Connection
S series inverters can be connected with 1-string of PV modules. Please select suitable PV modules with high reliability and quality. Open circuit voltage of module array connected should be less than 550V, and operating voltage should be within the MPPT voltage range.

| Note!
Please choose a suitable external DC switch if the inverter does not have a built-in DC switch.
---|---
| Warning!
PV module voltage is very high and within a dangerous voltage range, please comply with the electric safety rules when connecting.
| Warning!
Please do not make PV positive or negative to ground!
| Note!
PV modules – please ensure they are the same type, have the same output and specifications, are aligned identically, and are tilted to the same angle. In order to save cable and reduce DC loss, we recommend installing the inverter as near to the PV modules as possible.

Step 2: DC Wiring

• Turn off the DC switch.
• Choose 12 AWG wire to connect the PV module.
• Trim 6mm of insulation from the wire end.
• Separate the DC connector as below.
• Insert striped cable into pin contact and ensure all conductor strands are captured in the pin contact.
• Crimp pin contact by using a crimping plier. Put the pin contact with striped cable into the corresponding crimping pliers and crimp the contact.
• Insert pin contact through the cable nut to assemble into back of the male or female plug. When you feel or hear a “click” the pin contact assembly is seated correctly.
• Unlock the DC connector
  • Use the specified wrench tool.
  • When separating the DC + connector, push the tool down from the top.
  • When separating the DC – connector, push the tool down from the bottom.
  • Separate the connectors by hand.
• Grid Connection
  S series inverters are designed for single-phase grid. Voltage range is 220/230/240V; frequency is 50/60Hz. Other technical requests should comply with the requirement of the local public grid.

Model| S700| S1000| S1500| S2000| S2500| S3000| **S3300***
---|---|---|---|---|---|---|---
Cable| 2.5mm²| 2.5 mm²| 2.5mm²| 4mm²| 4mm²| 4mm²| 4mm²
Micro-Breaker| 16A| 16A| 16A| 25A| 25A| 25A| 25A

Note: A micro-breaker for max output overcurrent protection device shall be installed between inverter and grid, and the current of the protection device is referred to the table above, any load SHOULD NOT be connected with the inverter directly.

Step 3: AC Wiring

• Check the grid voltage and compare with the permitted voltage range (refer to technical data).

• Disconnect the circuit-breaker from all the phases and secure against re-connection.

• Trim the wires:

  • Trim all the wires to 52.5mm and the PE wire to 55mm.
  • Use the crimping pliers to trim 12mm of insulation from all wire ends as below.

• L: Brown/Red Wire

• N: Blue/Black Wire

• PE: Yellow & Green Wire

Note: Please refer to local cable type and color for actual installation.

• Separate the AC plug into three parts as below.
  • Hold middle part of the female insert, rotate the back shell to loosen it and detach it from female inset.
  • Remove the cable nut (with rubber insert) from the back shell.
  • Slide the cable nut and then the back shell onto the cable.
  • Push the threaded sleeve into the socket, tighten up the cap on the terminal.
  • Push the threaded sleeve to connection terminal until both are locked tightly on the inverter.
  • Remove the AC connector, press the bayonet out of the slot with a small screwdriver or the unlock tool and pull it out, or unscrew the threaded sleeve, then pull it out.

Earth Connection
Screw the ground screw with screwdriver as shown below:

Communication Device Installation (Optional)

• This S series inverter is available with multiple communication options such as WiFi, LAN, GPRS, RS485 and Meter with an external device.
• Operating information like output voltage, current, frequency, fault information, etc., can be monitored locally or remotely via these interfaces.

WiFi/LAN/GPRS (optional)
The inverter has an interface for WiFi/LAN/GPRS devices that allow this device to collect information from inverter; including inverter working status, performance etc., and update that information to monitoring platform (the WiFi/LAN/GPRS device is available to purchase from your local supplier).

Connection steps:

1. For GPRS device: Please insert the SIM Card (please refer to the GPRS product manual for more details).
2. For LAN device: Please complete the wiring between router and LAN device (please refer to the LAN product manual for more details).
3. Plug the WiFi/LAN/GPRS device into “WiFi/GPRS” port at the bottom of the inverter.
4. For WiFi device : Connect the WiFi with the local router, and complete the WiFi configuration (please refer to the WiFi product manual for more details).
5. Set-up the site account on the Fox ESS monitoring platform (please refer to the monitoring user manual for more details).

CT (optional)
This inverter has an integrated export management function. To enable this function, a power meter or CT must be installed. The CT should be clamped on the main live line of the grid side. The arrow on the CT should be pointing towards the grid. The white cable connects to CT+, and the black cable connects to CT-.

Export limitation setting:
Short press the touch key to switch display or make the number+1. Long press the touch key to confirm your setting. Note!
For a precise reading and control of power, a meter can be used instead of a CT. If the CT is fitted in the wrong orientation, anti-backflow function will fail.

RS485/Meter

• RS485
  RS485 is a standard communication interface which can transmit the real time data from inverter to PC or other monitoring devices.

• Meter (optional)
  The inverter has integrated export limitation functionality. To use this function, a power meter or a CT must be installed. For Meter installation, please install it on the grid side.

Export limitation setting:
Short press the touch key to switch display or make the Value+1. Long press the touch key to confirm your setting. DRM0/ESTOP
DRM0 setting
Short press the touch key to switch display or make the value+1. Long press the touch key to confirm your setting.

The PIN definitions of CT/RS485/DRM0/ESTOP interface are as below.

Note:

• Isolation Fault (Australia Market Only) This inverter complies with IEC 62109-2 clause 13.9 for earth fault alarm monitoring. If an Earth Fault Alarm occurs, the fault code Isolation fault will be displayed on the inverter screen and the RED LED indicator will light up.
• Reactive Power Regulation for Voltage Variation (Volt-VAr Mode) Details of how to enable this mode are contained in the “Advanced Configuration Guide”, which can be accessed at our website at https://www.foxess.com .
• Power Derating for Voltage Variation (Volt-Watt Mode) Details of how to enable this mode are contained in the “Advanced Configuration Guide”, which can be accessed at our website at https://www.foxess.com .

Inverter Start-Up
Please refer to the following steps to start-up the inverter:

1. Check if device is fixed well on the wall;
2. Make sure all DC breakers and AC breakers are disconnected;
3. Ensure AC cable is connected to the grid correctly;
4.  All PV panels are connected to inverter correctly; DC connectors that are not used should be sealed by cover;
5. Turn on the external AC and DC connectors;
6. Turn the DC switch to the “ON” position (if equipped with DC switch on the inverter).

If the LED is not green, please check the below:

• All the connections are correct.
• All the external disconnect switches are closed.
• The DC switch of the inverter is in the “ON” position.

Note:

• When starting the inverter for the first time, the country code will be set by default to the local settings. Please check if the country code is correct.
• Set the time on the inverter using the button or by using the APP.

Below are the three possible inverter states indicating that the inverter has started up successfully.

• Waiting: Inverter is waiting to check the DC input voltage from panels is greater than 45V (lowest start-up voltage) but less than 50V (lowest operating voltage), display will indicate the Waiting status and green LED will flash.
• Checking: Inverter will check DC input environment automatically when DC input voltage from the PV panels exceeds 60V and PV panels have enough energy to start inverter, display will indicate the Checking status and green LED will flash.
• Normal: Inverter begins to operate normally with green light on. Meanwhile feedback energy to grid, LCD displays present output power.
• Note: You can go to the setting interface on the display to follow the instructions if it is the first time to start up.

Complete inverter Start-up guide
After the initial start-up the inverter, display will go to the language settings page, short press to switch language and long press to confirm selection. Once language set, display will guide to set the safety regulation. Short press to switch safety regulation, and long press to confirm selection.

| Note!
Please set-up the inverter if it is the first time to start-up. The above steps are for the regular start-up of the inverter. If it is the first time to start up the inverter, you need to carry-out the initial set-up of the inverter.
---|---
| Warning!
Power to the unit must be turned on only after installation work has been completed. All electrical connections must be carried out by qualified personnel in accordance with legislation in force in the country of installation.

Inverter Switch Off
Please follow the below steps to switch off the inverter:

1. Switch off the inverter AC isolation switch.
2. Switch off the DC isolation switch and allow 5 minutes for the inverter to power down completely.

Operation

Control Panel

parameters. Press time <1s (short press): Next; Press time >2s (long press): Enter. Wait time 15s: Return to start.

Function Tree

Maintenance

This section contains information and procedures for solving possible problems with the Fox ESS inverters and provides you with troubleshooting tips to identify and solve most problems that can occur.

Alarm List

• Turn off the PV and grid, reconnect them.
• Please seek for help from us if it does not go back to normal state.

Bus OVP|

• Disconnect PV (+), PV (-) with DC.
• After the LCD switches off, reconnect and check again.
• Please seek for help from us if it does not go back to normal state.

DCI Fault|

• Wait for one minute after the inverter reconnects to grid.
• Disconnect PV (+), PV (-) with DC.
• After the LCD switches off, reconnect and check again.
• Please seek for help from us if it does not go back to normal state.

• Disconnect PV (+), PV (-) with DC.
• After the LCD switches off, reconnect and check again.
• Please seek for help from us if it does not go back to normal state.

GFC Fault|

• Disconnect DC and AC connector, check the surrounding equipment on the AC side.
• Reconnect the input connector and check the state of inverter after troubleshooting.
• Please seek for help from us if it does not go back to normal state.

GFCD Fault|

• Disconnect PV (+), PV (-) with DC.
• After the LCD switches off, reconnect and check again.
• Please seek for help from us if it does not go back to normal state.

Grid 10Min OVP|

• System will reconnect if the grid is back to normal.
• Or seek for help from us if it does not go back to normal state.

Grid Freq Fault|

• Wait for one minute, grid may go back to normal working state.
• Make sure that grid voltage and frequency complies with standards.
• Or, please seek for help from us.

Grid Lost Fault|

• Please check grid-connection, e.g., wires, interface etc.
• Checking grid usability.
• Or seek for help from us.

VGridTransient Fault|

• Disconnect PV (+), PV (-) with DC.
• After the LCD switches off, reconnect and check again.
• Please seek for help from us if it does not go back to normal state.

Grid Voltage Fault|

• Wait for one minute, grid may go back to normal working state.
• Make sure that grid voltage and frequency complies with standards.
• Or, please seek for help from us.

Consistent Fault|

• Disconnect PV (+), PV (-) with DC.
• After the LCD switches off, reconnect and check again.
• Please seek for help from us if it cannot go back to normal state.

Isolation Fault|

• Check the impedance among PV (+), PV (-) and ground. Impedance should be >1Mohm.
• Please seek for help from us if it cannot be detected or the impedance is <1Mohm.

Ground Fault|

• Check the voltage of neutral and PE.
• Check AC wiring.
• Restart inverter, if error message persists, seek for help from us.

OCP|

• Turn off the PV and grid, reconnect them.
• Or seek for help from us if it does not go back to normal.

PLL Fault|

• System will reconnect if the utility is back to normal.
• Or seek for help from us if it does not go back to normal state.

• Check the panel’s open-circuit voltage whether the value is similar or already >550Vdc.
• Please seek help from us when voltage ≤550Vdc.

Relay Fail|

• Disconnect PV (+), PV (-) with DC.
• After the LCD switches off, reconnect and check again.
• Please seek for help from us if it does not go back to normal state.

Sample Fault|

• Disconnect PV (+), PV (-) with DC.
• After the LCD switches off, reconnect and check again.
• Please seek for help from us if it cannot go back to normal state.

Comm Lost|

• Disconnect PV+, PV-, reconnect them.
• Or seek for help from us if it does not go back to normal state.

MS Comm Lost|

• Disconnect PV (+), PV (-) with DC.
• After the LCD switches off, reconnect and check again.
• Please seek for help from us if it cannot go back to normal state.

Over Temp|

• Check if the environment temperature is over the limit.
• Or seek for help from us.

Troubleshooting

1. Please check the fault message on the System Control Panel or the fault code on the inverter information panel. If a message is displayed, record it before doing anything further.
2. Attempt the solution indicated in table above.
3. If your inverter information panel is not displaying a fault light, check the following to make sure that the current state of the installation allows for proper operation of the unit:
4. Is the inverter located in a clean, dry, adequately ventilated place?
5. Have the DC input breakers opened?
6. Are the cables adequately sized?
7. Are the input and output connections and wiring in good condition?
8. Are the configurations settings correct for your particular installation?
9. Are the display panel and the communications cable properly connected and undamaged?

Contact Fox ESS Customer Service for further assistance. Please be prepared to describe details of your system installation and provide the model and serial number of the unit.

Routine Maintenance

• Safety check
  A safety check should be performed at least every 12 months by a qualified technician who has adequate training, knowledge and practical experience to perform these tests. The data should be recorded in an equipment log. If the device is not functioning properly or fails any of the tests, the device has to be repaired. For safety check details, refer to section 2 of this manual.

• Maintenance checking list
  During the process of using the inverter, the responsible person shall examine and maintain the machine regularly. The required actions are as follows.

  • Check that if the cooling fins at the rear of the inverters are collecting dust/dirt, and the machine should be cleaned when necessary. This work should be conducted periodically.
  • Check that if the indicators of the inverter are in normal state, check if the display of the inverter is normal. These checks should be performed at least every 6 months.
  • Check if the input and output wires are damaged or aged. This check should be performed at least every 6 months.
  • Get the inverter panels cleaned and their security checked at least every 6 months.

Note: Only qualified individuals may perform the following works.

Decommissioning

Dismantling the Inverter

• Disconnect the inverter from DC Input and AC output. Wait for 5 minutes for the inverter to fully de-energize.
• Disconnect communication and optional connection wirings. Remove the inverter from the bracket.
• Remove the bracket if necessary.

Packaging
If possible, please pack the inverter with the original packaging. If it is no longer available, you can also use an equivalent box that meets the following requirements.

• Suitable for loads more than 30 kg.
• Contains a handle.
• Can be fully closed.

Storage and Transportation

• Store the inverter in dry place where ambient temperatures are always between -40°C – +70°C;
• Take care of the inverter during the storage and transportation; keep less than 4 cartons in one stack.
• When the inverter or other related components need to be disposed of, please ensure it is carried out according to local waste handling regulations. Please be sure to deliver any inverter that needs to be disposed from sites that are appropriate for the disposal in accordance with local regulations.

The copyright of this manual belongs to FOXESS CO., LTD. Any corporation
or individual should not plagiarize, partially or fully copy (including software, etc.), and no reproduction or distribution of it in any form or by any means is permitted. All rights reserved.

FOXESS CO., LTD.
Add: No.939, Jinhai Third Road, New Airport Industry Area, Longwan District, Wenzhou, Zhej iang, China
Tel: 0510- 68092998
WWW.FOX-ESS.COM

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