JFY tech SUNTWINS 3300TL Setup guide

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Solar Inverters
INSTALLATION AND OPERATOR'S
MANUAL
Model number: SUNTWINS xxxxTL series for Australia Rev. 1.0

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REVISION TABLE
Document
Revision Author Date Change Description
1.0 Falcon.Tang 10/08/2011 First release
SAVE THESE INSTRUCTIONS !
IMPORTANT SAFETY INSTRUCTIONS
JFY-tech: Reproduction and disclosure of the contents of this manual are strictly
forbidden without prior authorization of JFY-tech.

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General notes
The SUNTWINS is a transformerless solar inverter with two channels input
of MPPT,and it converts the DC current of PV generator to AC current and
feed it into the public grid.When you chose it,you have opted for reliable and
powerful technology.With protection class IP65,the units are ready for use
in all environmental conditions,and high efficiency meets your
requirements.
GENERAL PRECAUTIONS
For your own safety and that of the unit, you must read and understand the
instructions contained in this document before starting to work.
Keep these instructions in a place accessible to all the personnel who work
with the unit so that these may be consulted.
Only professional technician may install and operate our units.
WARNING:
To avoid risk of electric shock from energy stored in capacitor, please
wait for at least 5 minutes to access the conductor part of input or output
terminals of the inverter after it is disconnected from the output of PV
panel and AC grid.
There is a fuse in our units. For continued protection against risk of fire,
replace only with same type andratingsof fuse. The replacement should be done
by qualified service personnel.
The installation of inverter must be performed in full compliance with the
National Wiring Rules of Standard AS/NZS 3000 and other relative local
standards and regulations.
No spare partsin package box. To avoid risk of electric shock, Donot remove
machine cover. No user serviceable parts inside. Refer servicing to qualified
service personnel. Please contact your reseller if you need to know the
nearest authorized repair center or qualified service personnel.
As a qualified service personnel, you should know both ac and dc voltage
sources are terminated inside this units. Each circuit must be individually
disconnected before servicing.
Read and understand all the instructions contained in this manual and
become familiar with the safety symbols in the relevant paragraphs before
you install and commission the equipment.
The connection to the AC grid must be done only after receiving approval
from the administering authority as required by national and state
interconnection regulations, and can be done only by qualified personnel.

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Keep the whole surface of the photovoltaic panel covered with material
opaque to solar radiation before connecting panel to equipment; this will
ensure that no dangerous high voltage is present at the connection cables.
This unit is designed to feed power to the public power grid (utility) only. Do
not connect this unit to an AC source or generator. Connecting Inverter to
external devices could result in serious damage to your equipment. By the
way, we have special types for these applications. If you are interested,
please contact your local dealer.
Although designed to meet all safety requirements, some parts and surfaces
of Inverter are still hot during operation. To reduce the risk of injury, do not
touch the heat sink at the back of the solar inverter or nearby surfaces while
Inverter is operating. By the way, keep it away from any flammable objects.
This version of SUNTWINS inverters shall be used with panels connected in
a “floating”way, i.e. with positive and negative terminal not connected to the
ground.
The equipment is provided with several labels, some of them with a yellow
background, which are related to safety issues.
Make sure to read the labels and fully understand them before installing the
equipment.
The symbols are:
Equipment grounding conductor (Main grounding protective
earth, PE)
Alternate Current (AC) value
Direct Current (DC) value
Phase
Grounding (Earth)
To avoid risk of electric shock from energy stored in capacitor,
please wait for at least 5 minutes to access the conductor part
of input or output terminals of the inverter after it is
disconnected from the output of PV panel and AC grid.
Caution: The temperature of metal enclosure may be high
during operation.

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CONTENT
1. OVERVIEW......................................................................................6
2. INSTALLATION ..............................................................................8
2.1 Package inspection ...............................................................8
2.2 Selecting the place of installation .........................................8
2.3 Fixed on the wall.....................................................................9
2.4 System diagram and connection label ..................................10
2.5 Connecting to the AC grid (utility)...........................................12
2.6 Connecting to PV Panel (DC input) ..............................................13
2.7 AC output protective device..............................................................14
3. CONTROL PANEL FUNCTIONS .........................................................14
3.1 Operate the Function Key .....................................................15
3.2 General LCD Display Information ...............................17
4. INVERTER START-UP AND OPERATION ......................................... 18
5. COMMUNICATIONS .................................................................19
5.1 Data communications with RS232..................................................19
5.2 Data communications with RS485(optional).................................19
5.2.1RS485 Serial Port..........................................................................19
5.2.2RJ45 Connectors ........................................................................... 20
5.2.3RS485 Daisy Chain........................................................................20
5.3 Monitor Inverter ....................................................................................22
6. MAINTENANCE ...........................................................................................22
7. TROUBLE SHOOTING ..............................................................................23
8. SPECIFICATIONS .......................................................................................24
9. JFY-tech WARRANTY ..............................................................................26
10. JFY-tech CONTACT INFORMATION ................................................ 28

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1. OVERVIEW
1.1 Machine Overview
Front View Bottom View
Fig.1 Overviews of inverter
Control and display panel
PV input
RS232 outlet
AC terminals cover
(AC terminals is inside)

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Opening the package
After opening the package, please check the contents of the box. It
should contain the following accessories:
Item Name Quantity
1. Solar inverter 1pcs
2. Mounting frame 1pcs
3. Mounting screws and blocks 6pcs
4. Safety-lock screws 2pcs
5. Socket head wrench 1pcs
6. DC socket assembly 1set
7. Special RS-232 cable 1pcs
8. Instruction manual 1pcs
9
.
Monitor software(
CD
)
1
pcs
1
0
.
Warranty s
heet
1pcs
SUNTWINS xxxxTL series include:
SUNTWINS 3300TL,SUNTWINS 4000TL,SUNTWINS 5000TL

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2. INSTALLATION
WARNING: The electrical installation of SUNTWINSinverter must be
performed in compliance with applicable local and national standards
and laws.
WARNING: The connection of SUNTWINS inverter to the AC grid must
be performed only after receiving authorization from the utility that
operates the grid.
2.1 Package Inspection
The customer is encouraged to perform the following checks:
Inspect the package box for apparent damage, such as holes, cracking or
any sign of possible damage to its contents.
Describe any damage or shortage on the receiving documents and have the
carrier sign his/her full name.
Open the package box and inspect the contents for internal damage. While
unpacking, be careful not to discard any equipment, parts or manuals. If any
damage is detected, call the delivering carrier to determine the appropriate
action. Save all shipping material for the event the carrier sends an inspector
to verify damage!
If the inspection reveals damage to the inverter, please call your local
supplier or the authorized distributor. They will determine if the equipment
should be returned for repair. They will also provide instructions on how to
get the equipment repaired;
It is the customer’s responsibility to file a claim with the carrier. Failure to file
a claim with the carrier may void all warranty service rights for any damage;
Carefully store the original packaging of SUNTWINSinverter since it shall be
used in case it is necessary to ship it for repair.
2.2 Selecting the place of installation
Place of installation should be selected based on the following considerations:
SUNTWINS inverters shall be set at a suitable height from the ground to
enable easy readout view of the display and the LEDs.
Select a well ventilated place sheltered from direct sun radiation. Choose a
place that allows fluent air flow around the unit.
Allow sufficient room around the unit to enable easy installation and removal of
the object from its mounting surface.
The following figure shows the recommended minimum clearances around the
inverter:

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Fig.2 Installingminimum clearances around inverter
2.3 Fixed on the wall
Step1: Drill 6 or 9 holes as illustrated in the Fig.3
Step2: Fix the mounting frame as illustrated inthe Fig.4 by the screws,then, hang
the inverter on the mounting frame.
Step3: Fix safety-lock screws at left side and right side as illustrated in Fig.5
with the attached socket head wench.
Step4: Check the installation conditions.
Fig.3 The size of mounting frame
For SUNTWINS 3300TL, SUNTWINS 4000TLand SUNTWINS 5000TL
200mm (8”)
200mm (8”)
200mm (8”)
200mm (8”)

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Fig.4 Hang inverter to mounting frame
Fig.5 Fix safety-lock screws
The customer is encouraged to perform the following checks:
Do not install thesolar inverter on agradient surface.
Check the upper straps of solar inverter and ensure itto fit on to the bracket.
Ensure safety-lock screws (M5 socket head cap screws) to insert into the
mounting frame through inverter’s heatsink.
Check the secure mounting of the solar inverter by trying to raise it from the
bottom.The solar inverter should remain firmly attached.
Choose a strong mounting wall to prevent vibrations while inverter is
operating.
2.4 System Diagram and Connection Label
The SUNTWINS series are an single phase solar inverters with two channels
input of MPPT. They are responsible for converting the direct current generated
by PV panels into single-phase 230Vac 50Hz alternating current for delivery into
the AC grid.
The SUNTWINS series can be used in an on-grid PV system to produce
electricity.
The installation of the SUNTWINS series and their connection to the AC grid
shall be done in accordance with local regulations and may require the
installation of adequate electricity consumption measuring devices.

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The SUNTWINS series only operates when it is connected to the AC grid and can
not operate as a stand-alone unit.
The simplified connection diagram of the inverter is as follows.
Fig.6 The PV system diagram
A. PV Panels: Provide DC power to inverter.
B. Solar inverter: Converts DC (Direct Current) power from PV panel(s) to AC
(Alternating Current) power. Because Inverter is grid-connected it controls the
current amplitude according to the PV Panel power supply. Inverter always
tries to convert the maximum power from your PV panel(s).
C. DC Switch and AC Switch: “DC switch”is between PV Panels and solar
inverter while “AC Switch”is between AC Grid (Utility) and solar Inverter.
They are be simplified in this diagram. In fact, they may consist of electrical
breaker, fuse and connecting terminals. To comply with local safety standards
and codes, the connection system should be designed and implemented by a
qualified technician. JFY-tech also provides the solar inverter with an
integrated DC switch demonstrated in dashed border in Fig.6. –S suffix
indicates the inverter is integrated a DC switch in PV input side.
D. AC Grid (Utility): Referred to as “grid”in this manual, is the way your electric
power company provides power to your place. Please note that Inverter can
only connect to low-voltage systems (namely, 220/230Vac, 50Hz).
Note: JFY-tech provides anintegrated switch box that includes DC switch, AC
switch, DC fuse, AC fuse, DC SPD and AC SPD devices as an option. Of
course, you can get similar switch box from your local market.
Fig.7 Connections availableon inverter bottom andrelevant marking
E. PV INPUT: Connected to PV Panels by MC4 terminals for each channels.
F. RS232: Connected to monitoring computer by special RS232 cable provided
by JFY-tech.

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G. RS485: daisy-chain communication for one or more inverters.
H. AC TERMINAL (three blocks in right hand): Connected to AC Grid.
2.5 Connecting to the AC Grid (Utility)
A. MeasureAC grid (utility) voltage and frequency. It should be 230VAC (or
220VAC), 50Hz and single phase.
B. Open AC Switch between solar inverter and AC Grid (Utility).
C. Open AC terminals cover and connect AC wires on AC terminals as follows:
Fig. 8 ACterminals under AC terminals cover
Recommended AC wires
Model Diameter(mm) Cross Area(mm
²
)AWG No.
SUNTWINS 3300TL 2.05 3.31 12
SUNTWINS
4000TL/5000TL 2.59 5.27 10
2.6 Connecting to PV Panel (DC input)
A. Under any condition! Make sure the maximum open circuit voltage (Voc) of
each PV string is less than 500VDC for SUNTWINS 4000TL and
SUNTWINS 5000TL. The length of input wire must be less than 30m. By the
way, generally, in the lowest ambient temperature of your installing field, the
Voc of PV string is the highest.
B. Use MC4 (Multi-contact) connectors for PV array terminals.
To ensure maximum output power, we recommend to choose two
groups of independent PV array for inverter DC input terminal.

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C. Open DC Switch and Connect the positive and negative terminals from the
PV panel to DC switch, then to positive (+) terminals and negative (-)
terminals on the solar inverter. Each DC terminal on inverter can withstand
20Adc.
D. When connecting PV panels to DC Switch, then, DC Switch to the terminals
of inverter, please make sure the polarity is correct.
Incorrect polarity connection could permanently damage the unit.
Please confirm short-circuit current of the PV string. The total short-circuit
current of the PV string should be less than the inverter’s maximum DC input
current.
E. High voltages exist when the PV panel is exposed to the sun. To reduce risk
of electric shock, avoid touching live components and treat connection
terminals carefully.
F. To avoide the Electro Magnetic Interference of inverter to the surrounding
equipment,the following right connecting way be recommended.
Note: Ensure that photovoltaic field voltage polarity matches the “+”and “-”
symbols. Before connecting SUNTWINS inverters with the photovoltaic field,
JFY-tech recommends to check, using a proper gauge, that the polarity value
and the voltage allowed value between positive and negative contacts are
correct.

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2.7 AC output protective device
A. For model SUNTWINS 5000TL the AC output side should be in series a over
current protective device which rated 32A, max rated breaking capacity 6KA
B. For model SUNTWINS 4000TL the AC output side should be in series a over
current protective device which rated 25A, max rated breaking capacity 6KA
C. For model SUNTWINS 3300TL the AC output side should be in series a over
current protective device which rated 20A, max rated breaking capacity 6KA
3. CONTROL PANEL FUNCTIONS
There is an LCD screen, twoLEDs and one function keyon the front of the solar
inverter. The LCD and LED provide you with details of the status of your Inverter.
You also can use this Function key as an simple control.
ALARM
POWER
Fig. 9 Control panel
A. LCD Screen: Display the operating data and situations, warning/error codes
and information.
B. The model of inverter (for example,SUNTWINS3000TL)
C. ALARM LED: Indicates the fault of inverter.
D. POWER LED: Indicates the inverter is running normally.
E. Function Key: Used to set different parameter and display language for the
inverter.
F. Description of inverter.
Note: To save power, the LCD display’s backlight automatically turns off after 10
seconds.

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3.1 Operate the Function Key
To view the operating data of the inverter, you can press the Function Key. Of
course, the data also will automatically and periodically display. To set different
display contrast and display language for the inverter, please carefully refert to the
following chart.

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AS4777
SN:XXXXXXXXXXXXX
Etoday=xx.xkWh
Pac=xxxx.xW
Etotal=xx.xkWh
Pac=xxxx.xW
Vac=xxx.xV
Pac=xxxx.xW
Vdc=xxx.x/xxx.xV
Pac=xxxx.xW
Iac=xx.xA
Pac=xxxx.xW
Fgrid=xx.xHz
Pac=xxxx.xW
SUNTWINS XXXXTL
Ver E1.00
Normal
Pac=xxxx.xW
Contrast
Contrast 04
Language
English
AS4777
SN:XXXXXXXXXXXXX
Contrast
Contrast 04
Press function key
Press function key
Press function key
Press function key
Press function key
Press function key
Press function key
Press function key
Press function key
Press function key
5 seconds
Press key adjust
contrast value
Press function key
Date: xxxx-xx-xx
Hour: xx:xx:xx
Press function key

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To lockup or unlock display message as follows:
3.2 General LCD Display Information
State
Message In
LCD
STATE
DIS
PLAY CONTENT
COMMENTS
Wait State Standby PV input voltage low
Waiting Initial waiting
Connect in xxS System checking
Reconnect in xxS System checking
Inverter connection State Connect OK Connect to Grid
Fault State Exx System error code
Wxx System warning code
Auto Test State Auto Testing Protection auto test
Program State Programming Update Software
Main Operating Messages In LCD
STATE DISPLAY CONTENT COMMENTS
Normal Operation
JFY-TECH Abbr. company name
WWW.JFY-TECH.COM JFY-TECH’s website
SUNTWINS xxxTL The inverter model
Ver Jx.x The FW version
SN: xxxxxxx The Serial Number
Etoday = xx.xkWh The energy today
Etotal = xxxxkWH The total energy in lifetime
Pac = xxxx.xW The output power of inverter
Iac = xx.xA The output current of inverter
Vac = xxx.xV The grid voltage

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Fgrid = xx.xHz The grid frequency
Vdc=xxx.xV The PV input voltage
AS4777 Comply with main standard
English Current selected language
Contrast x LCD Contrast
Fgrid = xx Hz The grid frequency
Note:
4.INVERTER START-UP AND OPERATION
WARNING:
Do not place any items on SUNTWINSinverter during operation.
When the inverter is operating, do not touch the heat sink since some
parts may become very hot.
Step 1: Ensure that the AC cable and DC cable is connected correctly, unused
DC plugs and AC terminal cover are sealed.
Step 2: Connect the DC and AC switches. The inverter starts up automatically
when DC-power from the PV strings is sufficient.
Once the solar inverter starts, it enters one of the following 3 states in turn:
Standby: The PV string can only provide just enough voltage to minimum
requirements of the internal controller unit.
Waiting: When the PV string DC voltage is greater than 100V, The inverter enters
a “waiting”state and attempts to connect to the grid.
Normal: When PV string DC voltage is greater than 150V, Inverter operates in the
normal state.
The Inverter will keep MPPT function and deliver power to AC Grid when it is in
normal operation. Maybe it will stop under the situation of low input DC-power,
Don’t worry, it will automatically restart again when DC-power from the PV string
is sufficient.
Error or Warning status
Inverter is designed to be user-friendly, therefore, the error or warning status of
the Inverter can be easily understood by reading the information shown on the
front panel display. All possible messages are shown in the following table.
DISPLAY COMMENTS
System fault
Auto Test Failed Auto Test does not pass
W01 No grid No Utility, NoGrid Connect
W02 Vin overvoltage PV panel Voltage is too high

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E01 Isolation error Insulation Problem of PV panel
E02 Ileak error GFCI Fault, leakage current is too high
E03 Grid fault Grid voltage/frequency is out of range
Inverter fault
E04 Coherence error Consistent Fault
E05 Over temperature Internal temperature abnormal
E06 Relay failure Output relay Fault
E07 DCinj failure Output Current DC Offset too high
E08 EEPROM failure EEPROM Fault
E09 Com. failure Communication Fault
E10 DC bus OV. DC Bus over-voltage
E11 DC bus UV. DC Bus under-voltage
E12 Vref error 2.5V Reference Voltage Fault
E13 DC sensor fault DC current sensor fault
E14 GFCI failure GFCI Device is damaged
5. COMMUNICATIONS
5.1 Data communication with RS232
Fig.10 RS232serial portand special RS232 cable
Open the cover of RS232 serial port,Connect solar Inverter andcomputer by
JFY-tech specialRS232 cable. By the way, the communication distance should be
below 10m.
NOTE:Ony JFY-tech special RS232 cablecan work. If its lengthis not enough, you
can buy “extended RS232 cable”in local market.
5.2 Data communication with RS485(optional)
5.2.1 RS485 Serial Port
The RS485 is used for several inverters’communication. Ethernet cable is applied
to connect each inverter herein. Only three cables in ethernet cable are applied:

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two signal ones and one for ground connection.
Fig.11The waterproof RJ45 socket and connectorsfor RS485 port
To help installation, the inverter features two RJ45 sockets to separate input
ethernet cable from output ethernet cable.
5.2.2 RJ45 Connectors
The RS485 serial connection, whether single unit orseveral inverters as daisy
chain, can be performed by means of the RJ45connectors (See Fig.11).
It makes no difference if its sockets is no.1 or no.2 since they are connected in
parallel, and signals are thus the same. One socket is for input ethernet cable with
RJ45 connector, another socket is for output ethernet cable with RJ45 connector.
The output ethernet cable reaches the following unit.
RS485 pin definition is as follows:
RJ45 connectors
Pin
#Signal Name Description
1 Not Used
2 Not Used
3RTN Signal Return
Common reference for logical signals.
4 Not Used
5 Not Used
6 Not Used
7-TR
- Data Line
Required for RS485 communication.
8+TR
+ Data Line
Required for RS485 communication.
NOTE: You can buy T-568B standard Straight-Through ethernet cable to connect
two adjacent inverters in local market. Of course, you can do it by yourself and
remember the Ethernet cable is Straight-Through.
5.2.3 RS485 Daisy Chain