SolarMax 5G Series User manual

ON-GRID/GRID TIED
THREE PHASE MPPT STRING PV INVERTER
User Manual
Ver: 1.0, 2020-01
SM-5K-G3P
SM-6K-G3P
SM-7K-G3P
SM-8K-G3P
SM-10K-G3P
www.solarmax.pk

Contents
1. Introduction
1.1 Appearance Introduction
1.2 Parts list
2. Safety warnings and instructions
2.1 Safety signs
2.2 Safety instructions
2.3 Notes for using
3. Operation Interface
3.1 Interface View
3.2 Status Indicator
3.3 Buttons
3.4 LCD Display
4. Product installation
4.1 Select installation location
4.2 Inverter Installation
5. Electrical Connection
5.1 DC input terminal connection
5.2 AC input terminal connection
5.3 The connection of the ground line
5.4 Inverter monitoring connection
6. Startup and Shutdown
6.1 Start up the inverter
6.2 Inverter Shutdown
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7. Limiter function(Optional)
7.1 Limiter function wiring diagram
7.2 Connect the limiter to inverter
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9. Repair and Maintenance
10. Error information and processing
10.1 Error code
10.2 Troubleshooting
11. Specification
8. General Operation
8.1 The initial interface
8.2 Device information
8.3 Fault Record
8.4 ON/OFF setting
8.5 Parameter setting
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7.3 Use of anti-backflow function
7.4 Notes while using limit function

1. Introduction
Photovoltaic Grid-connected System
Application of inverter in photovoltaic power system
1.1 Appearance Introduction
Three Phase String Power Inverter can convert solar panel DC power into AC power
which can directly input to the grid. Its appearance is shown below.These models contain
SM-5K-G3P、SM-6K-G3P、SM-7K-G3P、SM-8K-G3P and SM-10K-G3P.
The following is collectively referred to as‘inverter’.
Pic1.1 Front view Pic1.2 Bottom view
Pic1.3 Accessories drawing
1.1 Parts list
Description
Grid-tied PV String Inverter
Wall mounting bracket
Mounting stainless steel screws M4×12
AC power connectors
DC power connectors（including inserted spring）
Stainless steel anti-collision bolt M6×80
Square hole sealing plate（Wi-Fi Function selection）
User manual
Wifi-Plug（optional）
No
1
2
3
4
5
6
7
8
9
1
1
4
1
2pairs
4
1
1
1
Qty
PV strings Inverter Metering device Power grid
Family load
1.2 Parts list
Please check the following table, to see whether all the parts are included in the package：
1 2 3 4 5
2. Safety warnings and instructions
2.1 Safety signs
Improper use of the inverter will cause electric shock and burn. During installation and
maintenance. Please strictly follow the instructions on this manual. Please read the user
manual carefully before using the inverter. And please keep the instructions properly for
afterwards use.
Safety signs are used to emphasize potential safety risk and important safety information.
The manual includes below signs:
- 01 - - 02 -
6 7 8 9
USER
MANUAL

Warning：
2.2 Safety instructions
Safety warning——Indifference of the signs in the manual may cause
injury or even death.
Shock Hazard：
Shock warning sign——Incorrect follow of this sign may get shocked.
Safety Hint：
Prudent operation——Incorrect follow of the safety operation hints in
this manual may cause inverter defect.
High Temperature Hazard：
Inverter's local temperature may exceed 80℃ while under operating.
Please do not touch the inverter's surface.
Warning：
Electrical installation of the inverter must conform to the safety operation
rules of the country or local area.
Warning：
Inverter is non-isolated topology structure, hence must insure DC input
and AC output are electrical isolated before operating the inverter. Strictly
prohibit grounding the positive and negative poles of the PV string.
Otherwise it will damage the inverter.
Shock Hazard：
Prohibit disassembling inverter case. There existing shock hazard, may
cause serious injury or death, please ask qualified person to
maintenance.
Shock Hazard：
When PV module is exposed to sunlight, the output will generate DC
voltage.Prohibit touching to avoid shock hazard.
Shock Hazard：
After disconnecting the input and output of the inverter, it takes at least
5 minutes for the inverter to completely release the residual energy and
waits for at least 5 minutes before it can be overhauled.
High Temperature Hazard：
Inverter's local temperature may exceed 80℃ while under operating.
Please do not touch the inverter's surface.
2.3 Notes for using
1. Inverter should be installed and maintained by qualified person under local standard
regulations.
2. It must disconnect the AC side first, then disconnect DC side before doing installation
and maintenance, after disconnecting, please wait at least 5 mins to avoid getting
shocked.
3. Local temperature of the inverter may exceed 80 ℃ while under operating. Do not
touch to avoid getting injured.
4. All electrical installation must accord with local electrical standards, and after
obtaining the permission of the local power supply department, the professionals can
connect the inverter to the grid.
5. Please take appropriate anti-static measure.
6. Please install where children can not touch.
The three phase string power inverter is designed and tested under related safety regulations.
It can ensure the personal safety of the user. But as a electric device,it may cause shock or
injury by incorrect operation. Please operate the unit under below requirements:
- 03 - - 04 -

3.2 Status Indicator
3. Operation Interface
3.1Interface View
8. Don't insert and remove AC and DC terminals when the inverter is in normal
operation.
9. The DC input voltage of the inverter must not exceed the maximum input voltage
of the model.
The inverter panel has 4 indicators, the left one is DC output indicator(green),indicates
normal DC input power status. Beside is the AC indicator(green),indicates normal AC
connecting status. Next is the operating in dicator(green) indicates normal output. The
right indicator is alarm(red), indicates alarming.
7. When starting the inverters, first close the circuit breaker at the grid side, then close the
DC side; when closing the inverters, first disconnect the circuit breaker at the AC side,
then disconnect the DC side.
Pic 3.1 Panel
3.3 Buttons
There are four buttons on the inverter panel：above is up and increase button (UP), below
is down and decrease button (DOWN）, left is ESC button (ESC）, right is Enter button
(ENTER). The following functions can be achieved by the four buttons：
● Page turning (use UP and DOWN button）
● Modify adjustable parameters (use ESC and ENTER button）
3.4 LCD Display
The three-phase string inverters use a dot matrix display，mainly contains the
following：
● Inverter operation status and information;
● Operating information;
● Warning message and malfunction display.
Explanation
Inverter detects DC input
Low DC input voltage
Grid Connected
Grid Unavailable
Under normal operating
Stop operating
Detected faults or report faults
Under normal operating
Indicator status
●DC
●AC
● NORMAL
● ALARM
on
off
on
off
on
off
on
off
- 05 - - 06 -

4.1 Select installation location
4. Product installation
Pic4.1 Recommended installation place
Whenyoureceivetheinverter and prepare to install it, please select a suitable location,
should consider below factors:
● Ventilation—Must insure the air ventilation of the installation location,improper
installation may cause overheating and effect the working efficiency and lifespan.
● Sun-shade—Expose the inverter to sunshine will cause overh eating and effect the
working efficiency.
● Avoid rain and snow—Even if the inverter has IP65 protection. We still recommend
installing the inverter at the ventilate place where can avoid rain and snow. It can help
extend the lifespan of the inverter.
● Please select the wall with certain bearing capacity.
● When doing the installation, vertical slope cannot exceed +/-15°.Make sure no lateral
tilt. Otherwise it will affect the function of the heat sink. Cause the output power lower
than expected.
● If install more than one inverter, must leave at least 500mm gap between each inverter.
And each inverter must be at least 500mm above and below. And must install the
inverter at the place where children cannot tuch. Please see pic 4.3.
● Consider whether the installation environment is helpful to see the inverter LCD display
and indicator status clearly.
● Must offer a ventilate environment if inverter is installed in the airtight house.
Safety Hints：
Do not place or store any items next to the inverter.
Pic4.2 Installation Angle
≤15°
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Pic4.3 Installation Gap
Pic4.4 Inverter Installation
The inverter is designed according to the wall mounted type installation, please use the
wall mounted (the brick wall of the expansion bolt) when installing.
4.2 Inverter Installation
Anchoring
Mounting bracket
M4*14 Stainless steel screws
Inverter
Inverter should be vertically installed, as shown in pic 4.5，installation procedure shows
below:
1. Position the bolts on the appropriate wall according to the bolt positions on the
mounting shelves and mark the holes. On the brick wall, the installation must be suitable
for the expansion bolt installation.
2.Ensure that the position of the installation holes on the wall (A, B, C, D) are the same
position of themountingplate (picture 4.5), and the mounting level is guaranteed.
3. Hang the inverter to the top of the mounting rack and then use the M4 screw in the
accessory to lock E and F (picture 4.6) to ensure that the inverter does not move.
Pic4.5 Inverter hanging plate installation
- 09 - - 10 -
≥500mm
≥500mm

The inverter has considered the convenience of the electrical connection while designing.
we design fast connection for both DC and AC ,all electrical connections conform to
related standards of the country .
In order to safe connection, the electrical connection must follow below steps：
1. Switch AC off
2. Switch DC off
3. Connect the inverter to solar panels
Pic4.6 Mounting of inverter
5.1 DC input terminal connection
5 Electrical Connection
a). Make sure that the polarity of the output voltage of the solar panel is consistent with the
polarity identified by the inverter
b). Connect DC positive and negative to the inverter input terminal.(see picture 5.1 and
picture 5.2)
Pic 5.1 DC “+ ”connector (MC4)
c).Making DC connection line Strip off the DC wire about 7mm, disassemble the
connector cap nut(Picture 5.3)
1). Crimping metal terminals with crimping pliers as shown in Picture 5.4
Pic 5.2 DC“-”connector (MC4)
Pic 5.3 Disassemble the connector cap nut
Pic 5.4 Crimp the contact pin to the wire
7mm
7mm
- 11 - - 12 -

2). Insert the contact pin into the connector housing until it locks in place. Screw the cap
nut onto the connector housing. Torque to 2.5-3Nm(as shown in Picture 5.5)
3).Finally insert the DC connector into the positive and negative input of the inverter，
shown as Picture 5.6
Pic 5.5 connector with cap nut screwed on
Sheet 5.1 Specs of AC cable
Pic 5.6 DC input connection
2
Traverse area（mm ）
Cable type Range
4.0(12AWG) 5.5-9.0
Recommended
size
Outside diameter
of cable（mm）
4.0-6.0
(12-10AWG)
Industry generic PV
cable
（model;PV1-F）
NOTE:
Sunlight shines on the panels will generate voltage, high voltage in series
may cause danger to life. Therefore, before connecting the DC input line,
the solar panel needs to be blocked by the opaque material and ensure that
the DC switch is ‘OFF’, otherwise, the high voltage of the inverter may
lead to life-threatening conditions.
Do not close the DC switch after the DC terminalis connected.Connect the AC terminal
to the AC size of the inverter, the AC size is equipped with Three-phase AC terminals that
can be conveniently connected.Flexible cords are recommended for easyinstallation. The
specifications are as shown in sheet 5.2.
Warning：
Prohibit using a single circuit breaker for multiple inverters , prohibit the
connection of load between inverter circuit breakers.
Sheet 5.2 Cable information
5.2 DC input terminal connection
Outside cable(3+PE)20m Outside cable(3+PE)20m
Specification
Model SM-5k/6K/7K/8K-G3P
16A/400V
SM-10K-G3P
25A/400V
DiaCable item Cable
CSA
Cable
outer
dia
15~18mm2.5mm 4mm
AWG Dia Cable
CSA
6mm10 2.5mm
Cable
outer
dia
AWG
15~18mm 10
2 2
Breaker
Max cable
length
- 13 - - 14 -

Pic 5.7 AC connector structure
The AC output connector is divided into three parts: matching ocket, sleeve sand sealing
sleeve, as shown in Picture 5.7, the steps are as fand sealing sleeve, as shown in Picture 5.7,
the steps are as follows:
Step 1 Remove the cable sealing ring and sleeve in sequence from the AC connector.
Step 2 Use strippers to strip the protective sheath and insulation layer of the AC
cable to the right length, as shown in Picture 5.8.
Pic 5.8 Strip AC cable
Warning：
Be careful to distinguish the L1, L2,L3 and PE of the AC cables.
8~15mm
40mm
1. Matching socket 2.Sleeve 3.Sealing core 4.Sealing nut
1
2
34
Pic 5.10 AC input connection
Pic 5.9 AC Connector Hole Pattern
Step 3: Insert the cable (L1, L2, L3, PE) into the sealing sleeve and sleeve.
Step 4 Use the hexagon screwdriver, loosen the bolts of the socket in turn, and
insert each cable core into the corresponding jack, and set each screw. The
connection hole of AC connection terminal labeling is shown in Picture 5.9.
Step 5 Set the sleeve and sealing ring in place
Step 6 Connect the terminals to the inverter as shown in picture 5.10.
Safety Hint：
The AC cable line L1 is connected to socket 1; L2 is connected to socket 2;
L3 is connected to socket 3, the PE line is connected to the earth , and does
not involve N wire connections, please do not insert N lines into the socket
of N.
- 15 - - 16 -

Good grounding is good for resisting surge voltage surge and improving EMI performance.
Therefore, before connecting AC, DC, and communication cables, you need to ground
the cable firstly. For a single system, just ground the PE cable; For multiple machine systems,
all PE cables of the inverter need to be connected to the same grounding copper platoon
to ensure the equipotential connection. The installation of the shell ground wire is shown
as Picture 5.11.
Inverter has the function of wireless remote monitoring. The inverter with Wifi function
is equipped with Wifi Plug to connect the inverter and network. Wifi Plug's operation,
installation, Internet access, APP downloading and other processes are detailed in the
instructions. Picture 5.12 is the Internet monitoring solution.
5.3 The connection of the ground line
5.4 Inverter monitoring connection
Warning：
Inverter has built-in leakage current detection circuit, If an external
leakage current protection device is connected,its operating current
must be greater than3 00 mA or higher,otherwise 1inverter may not
work properly.
Pic 5.11 The installation of the shell ground wire
When the inverter is out of the factory, the installation location of WiFi plug is sealed by
a sealed plate as shown in Picture 5.13.When installing the Wifi Plug, remove the sealing
plate, replace it with the sealing plate with square hole in the accessories, and tighten the
screws. Insert the Wifi Plug into the interface and fix it with a screw. The configuration
of the WiFi Plug needs to be performed after various electrical connections have been
completed and the inverter DC power on.When the inverter is on the DC power, it is
determined whether the WiFi Plug is normally electrified (The LED light shines out of
the shell).
5.4.1 Installation of Wi-Fi Plug
Pic 5.12 Internet monitoring solution
PC
Router
WIFI
GPRS
Web Server
Phone
- 17 - - 18 -

For the configuration of Wi-Fi Plug, please refer to illustrations of the Wi-Fi Plug.
5.4.2 Configuration of Wi-Fi Plug
Pic 5.13 Wifi Plug installation diagram
6. Startup and Shutdown
6.1 Start up the inverter
6.2 Inverter Shutdown
Before starting the inverter, make sure that the inverter can meet the following conditions,
otherwise it may result in fire or damage to the inverter. In this case,we do not undertake
any responsibility. At the same time, to optimize the system configuration, it is
recommended that the two inputs be connected to the same number of photovoltaic
modules.
When start up the three phase string inverter, should fellow below steps：
1. First switch on the AC breaker.
2. Turn on the DC switch of the photovoltaic module,and if the panel provides
sufficient starting voltage and power, the inverter will start.
3. When the ac voltage and DC voltage are normal, the inverter start-up is readyto
begin. The inverter will first check the internal parameters and the grid parameters, while
the liquid crystal will show that the inverter is self-checking.
4. If the parameter is within acceptable range, the inverter will generate the normal grid.
NORMAL indicator light is on.
Must follow below steps while shutting down the inverter:
1. Switch off the AC breaker.
2. Wait for 30 seconds, turn off the DC switch (if any), or simply disconnect the DC input
connector. The inverter will close the LCD and all LED within two minutes.
a). The maximum open voltage of each set of photovoltaic modules shall not exceed
600VDC under any conditions.
b). Each input of the inverter must use the same type of photovoltaic module in series.
c). Total output power of pv shall not exceed the maximum input power of inverter,
each photovoltaic modules shall not exceed the rated power of each channel.
d). The short circuit current of each series of photovoltaic modules cannot be greater
than 10A at any time.
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7. Limiter function (Optional)
The inverter has external limitier function. This function is optional. It can collect counter-
current power to control the output power of the inverter, so that the power of inverter
and load can be offset, and the excess power will not be fed back to the grid. If you purchase
the inverter with limiter function, a external limiter and three current senors will be included
in the package which is necessary for the function.The external limiter is shwn as Pic 7.1.
You can see corresponding line mark next to the green interface. The green terminals on the
left are the interface of three-phase AC line (L1, L2, L3) and N Line (N), and the the right
are the interface between three sets of current sensor and one set of control terminals.
Limiter will collect voltage and current from these interfaces and send control signals to the
inverter.

- 21 - - 22 -
When you are reading this, we believe that you have completed the connection according
to the requirements of chapter 5, if you has been running your inverter at this time, and
you want to use the limiter function, please turn off AC and DC switch of the inverter, and
wait for 5 minutes until the inverter completely discharged. In order to make it easier for
you to use the limiter function of the inverter, we have specifically given the wiring
diagram,as shown in Picture7.2, the red lines connected to the utility grid called wire (L),
blue line shows the zero line(N), yellow green line shows the ground wire (PE). We
recommend installing an AC switch between the inverter outlet and the utility grid, the
specs of the AC switchis determined by the load capacity.
The AC switch we recommend to connect to the inverter output refer to Table 5.2.
7.1 Limiter function wiring diagram
Pic 7.1 Limiter view
- 20 -
L1 L1(L)L1(K)L2(L)L2(K)L3(L)L3(K) + -L2 L3 N
U
V
L1(L)
Solar panels
Load
Distribution Box
Limiter
Control signal
L1(K)
L2(L)
L2(K)
L3(L)
L3(K)
L1
L2
L3
N
W
N
Control signal
Pic 7.2 Wiring diagram
7.2 Connect the limiter to inverter
The limiter will measure the voltage and current of three phases separately, and this
manual only introduces the installation steps of one phase, the other two phases are
the same. The specific installation steps are as follows:
(1)Connect limiter to the grid. Connected to the grid is to measure the voltage of grid.
Before connect to the grid, please turn off the switch to avoid the risk of electric shock.
Choose one wire from the bottom of the three-phase DC switch. (any phase of U,V,W)
to connect with L1 terminal, then tighten the line with a screwdriver.
(2)Connect limiter to clamp senor. Clamp senor can measure the current of the AC side,
it should be connected to the front side of the load (domestic appliance ect.) to achieve
this function. Only when the limiter collects the voltage and current of the same phase can
it judge the power of the phase. So the clamp senor should be connected to the same
phase as the before. Open the side buckle of the clamp senor, then clamp the senor to the
AC line on the DC switch, the arrow direction on the senor should towards that of the
load. The clamp senor has two lines (shown as below), and the white line corresponds to
K terminal, black line corresponds to L terminal. Connect the white line to the L1(L) and
L1(K) terminal refer to the line mark of the limiter and tighten the line with screwdriver.
This is the whole installation process of one phase.

- 23 - - 24 -
When the connection is completed, the following steps should be referenced to use this
function:
1.Turn on the AC switch
2. Turn on the DC switch , Waiting inverter LCD lighting up
3.Press Enter button on the LCD panel in the main interface into the menu options, select
[parameter setting] to Enter setup submenu, and then select [running parameters] as
shown in figure 7.8,at this time please Input the default password 1234 through pressing
the button [up down, confirm], enter the operation parameter setting interface, Shown as
figure:
7.3 Use of anti-backflow function
Pic7.5 Waterproof terminal Pic7.6 Connect limiter to inverter
1 2
limiter
+ -
1
2
Pic7.3 Clamp Senor Pic7.4 Clamp Senor internal arrow
(3)After you finish the installation in process 1 and 2, connect the N line (N) to the N
terminal of the limiter and tighten the line.
(4)Connect the control line. There are two numbers 1 and 2 on the interface of limiter,
and the same on the waterproof terminal of the inverter. Twist the waterproof terminal
and connect the red line to number 1 and black line to number 2 shown as the picture.
After that connect the terminal to the interface of the limiter. The other side of the line
should be connected to the control terminal.
L
K

- 25 - - 26 -
System Param
Param
<<
Run
Pic 7.9 Limit switch
4. Operate the button [up down], move setting cursor to limit function and press the
button [enter] .At this time you can turn on or turn off the limit function by choosing
[up down] button, please press [enter] button to confirm when setting done.
5. Move the cursor to [confirm] , press ENTER to save the settings and exit the running
parameters page, otherwise the settings are invalid.
6.Need to understand that [grid power] shows positive means grid power is consuming
energy, and there is no backflow.If [grid power] is negative, it means backflowr to the
grid or current transformer direction error has occurred.Please read more on chapter 7.9.
7. After properly connection is done, wait for inverter starting, If the power of the PV
array meets the current power consumption, the inverter will maintain a certain output
to counteract the power of the grid without backflow .
Fun GFDI OFF
OFF
<<
Limiter
_
For your safety and the operation of limiter function of the inverter, we put forward the
following Suggestions and precautions:
7.4 Notes while using limit function
Warning：
In limit function we strongly recommend that the two photovoltaic
arrays are formed by the same number of photovoltaic panels of the
same size, which will make the inverter more responsive to limit the
power.
Warning：
When using limit function, you need to ensure that the opening
voltage of PV input is no more than 800V, Otherwise may cause
inverter malfunction. Do not have this limitation if not working
under limit function.
Warning：
While the grid power is negative and inverter has no output power,
That means the orientation of the current sensor is wrong,pls turn
off the inverter and change orientation of the current sensor.
Warning：
The current sensor of limit function needs to be clamped on the fire
line of the grid connected to the inverter., otherwise inverter cannot
able to normal operate
Warning：
Do not change the operating parameters if non-professional when
setting the limit function switch, otherwise inverter cannot able to
normal operate.
Pic7.8 Parameter setting

From the initial interface, you can check power, day power, total power,inverter ID ,
model and time.
8.1 The initial interface
During normal operation, the LCD shows the current status of the inverter,including the
current power, total generation, a bar chart of power operation and inverter ID,etc. Press
the Up key and the Down key to see the current DC voltage, DC current, AC voltage, AC
current, inverter radiator temperature,software version number and Wifi connection state
of the inverter.
8. General Operation
Pic8.2 The initial interface
Pic8.6 Main Menu
Pic8.3 PV input and DC current information
Pic8.4 AC running state information
Pic8.5 Temperature and software version
ON/OFF
<<
Setup
Power: 108W
NormalState:
PV1: 0.0V 0.0A
PV2: 0.0V 0.0A
UC: 0V 0.0A
Freq: 0.00Hz
Press UP or Down you can check inverter DC voltage, DC current, AC voltage, AC
current, inverter temperature, software version information.
You can check the inverter inside temp, LCD software Ver137 and inverter software
Ver1400. There are two black spot in the bottom right corner. The first flash means inverter
is communicating with LCD. The second flash means LCD is communicating with Wifi
plug. There are four submenus in the Main Menu.
You can check the PV information, the number of strings input,MPPT voltage and MPPT
current.
You can check the three phase voltage, current, and grid currency.
Temp:35.3 ℃C
Start
LCD main menu
AC output data
Temp and
interface
Time
Generated energy
Operation
information
Fault record
Production data
Testing data
on/off
Param setting
System param
Running param
Protection param
Comm param
DC input data
Pic8.1 LCD operation flow chart
- 27 - - 28 -

Pic8.13 Setting
Pic8.14 System Param
Pic8.12 Setting
Setting includes system param, run param, protect param, comm：param. All of these
information for maintenance reference.
8.5 Parameter setting
System Param includes time set, language set, display set and factory reset.
8.5.1 System Param
Pic8.7 Statistics
Pic8.8 E-Day
Pic8.9 E-Month
Device Info.
<<
Fault Record
GL1030 SN-01
ID:1707010001
ID:1707010001
Ver0201 Ver5102
8.2 Statistics information
There are five submenus in the statistics.
Into each submenu through cursor.
This information is for technician's reference.
Pic8.10 Fault Record
Pic8.11 ON/OFF setting
Only can keep four fault record in the menu include time, customer can deal with it
depends on the error code.
8.3 Fault Record
8.4 ON/OFF setting
1F19 181017 07
2F35 181015 08
TurnON
<<
TurnOFF
System Param
<<
RunParam
RunParam
<<
ProtectParam
<<
ProtectParam
Comm.Param
Time Set
<<
Language Set
Display Set
<<
Factory Reset
- 29 - - 30 -

Pic8.15 Time set
8.5.1.1 Time set
20181017 OK
Cancel08:45:57
English
<<
PassWord
****
ActiveP 100%
<<
ReactiveP 0%
oo CHINA
<<
oo BRAZIL
OO CHINA
<<
oo BRAZIL
AC OverVoltage
<<
265.0V
AC LowVoltage
<<
185.0V
Fun GFDI OFF
<<
LimiterOFF
_
Pic8.16 Language set
Pic8.19 Protect Param
Pic8.17 Password
Pic8.18 Running Param
8.5.1.2 Language set
8.5.2 Running Param
8.5.3 Protect Param
Note：
Password required-restricted access-authorized engineer only.Un-
authorized access may avoid the warranty. The initial password is
1234.
Note：
Engineer Only.
We will set the param depends on the safety requirements, so
customers don’t need to reset it. The password is same as 8.5.2
Running param.
Note：
Engineer only.
- 31 - - 32 -

AC OverFreq
<<
51.50Hz
AC LowFreq
<<
47.50Hz
Pic8.20 “CUSTOM”
9. Repair and Maintenance
10.1 Error code
10.Error information and processing
String type inverter doesn't need regular maintenance. However, debris or dust will affect
heat sink's thermal performance. It is better to clean it with a soft brush.If the surface is
too dirty and affect the reading of LCD and LED lamp, you can use wet cloth to clean it up.
In the case of failure the LCD screen will display an alarm message. In this case the inverter
may stop feeding energy into the grid. The alarm description and their corresponding
alarm messages are listed Table 9.1.
Three-phase string inverters are designed according to grid-connected operating
standards. It meets safety requirements and electromagnetic compatibility requirements.
Before leaving the factory, the inverter has undergone several rigorous tests to ensure that
it can be operated reliably and permanently.
Warning:
When the device is running, the local temperature is too high and the
touch can cause burns. Turn off the inverter and wait for it cooling,
then you can clean and maintain.
Warning:
When cleaning any part of the inverter, no solvent, abrasive materials
or corrosive materials shall be used for cleaning.
- 33 - - 34 -
DescriptionError code
DC input polarity reverse faultF01
DC insulation impedance permanent faultF02
DC leakage current faultF03
Ground fault GFDI (battery and grounding)F04
Read the memory errorF05
Write the memory errorF06
GFDI blown fuseF07
GFDI grounding touch failureF08
IGBT damaged by excessive drop voltageF09
Auxiliary switch power supply failureF10
Ac main contactor errorsF11
AC auxiliary contactor errorsF12
ReservedF13
DC firmware over currentF14
AC firmware over currentF15
GFCI(RCD) Ac leakage current faultF16
Three phase current, over-current faultF17
AC over current fault of hardwareF18
All hardware failure synthesisF19
DC over current fault of the hardwareF20
DC leakage flow faultF21
Crash stop (if there is a stop button)F22
AC leakage current is transient over currentF23
DC insulation impedance failureF24
DC reverse irrigation failureF25
The DC busbar is unbalancedF26
DC end insulation errorF27

Note：
If your SM-5K/6K/7K/8K/10K-G3P string inverter has any of the
fault informa�on shown in Table 10.1,and when you reset the
machine and s�ll don’t solve the problom,please contact our
distributor and provide the below details:
1.Serial number of the inverter;
2.The distributor/dealer of the inverter(if available);
3.Grid genera�on date;
5.Your contact details.
4.The descrip�on of problem(include LCD’s error code and LED status
indicator lights);
- 35 - - 36 -
Inverter 1 DC high faultF28
AC load switch failureF29
AC main contactor failureF30
AC secondary contactor failureF31
Inverter 2 dc high faultF32
AC over currentF33
AC current over loadF34
No AC gridF35
AC grid phase errorF36
AC three-phase voltage imbalance failureF37
AC three-phase current imbalance failureF38
AC over currentF39
DC over currentF40
AC Line W,U over voltageF41
AC Line W,U low voltageF42
AC Line V,W over voltageF43
AC Line V,W low voltageF44
AC Line U,V over voltageF45
AC Line U,V low voltageF46
AC Over frequencyF47
AC lower frequencyF48
U phase grid current DC over currentF49
V phase grid current DC over currentF50
W phase grid current DC over currentF51
AC inductor A, phase current DC current highF52
AC inductor B, phase current DC current highF53
AC inductor C, phase current DC current highF54
DC busbar voltage is too highF55
DC busbar voltage is too lowF56
AC reverse irrigationF57
AC grid U over currentF58
AC grid V over currentF59
AC grid W over currentF60
Reactor A phase over currentF61
Reactor B phase over currentF62
10.2 Troubleshooting
Table10.2 Troubleshooting
Table10.1 Error code
Grid voltage exceed the nomal working rangeF41~F48
Grid FailureF35
Solar over voltage or low voltageF55 F56
Loss one phase or poor connection or inverter hardware
damage
F26
Grid have some surge loadF15 F18
Ground error or PV + or - short to the GroundF23
PV+ or PV- to the Ground resistance too low . F24
Reactor C phase over currentF63
IGBT heat sink high temperatureF64