KStar KSG-3.2K-DM User manual

201808 Ver 1.0
Solar InverterSolar Inverter
User Manual
KSG-3.2K/4K/5K-DM

Installation and Operation Manual 1
Table of Contents
1 Safety Instructions ................................................................ 2
2 PV Inverter Overview ........................................................... 4
3 Installation ............................................................................. 5
3.1 Package ........................................................................ 5
3.2 Installation of Inverter ................................................. 6
3.3 Installation Location .................................................... 7
3.4 Installation Procedure ................................................. 8
3.5 lectrical connection ................................................... 9
4 Operation of Inverter .......................................................... 16
4.1 Normal Working Status ............................................. 17
4.2 Fault Status ................................................................ 18
4.3 Shutdown Status ....................................................... 18
4.3 L D Display ............................................................... 19
4.4 LCD Display ............................................................... 19
5 Trouble Shooting ................................................................ 31
6 Specification ....................................................................... 33
7 Product Warranty ................................................................ 35

Installation and Operation Manual 2
1 Safety Instructions
1. Electric Shock
The product has alternating current (AC) and direct current
(DC) connections, in order to avoid any electric shocks during
maintenance or before installation, please make sure the
disconnection of these AC or DC ports, grounded for solar
system and inverter.
2. Operation of Inverter
The product can be only operated or maintained by
professionals. The inverter can only be activated under such
situation: the housing or cover in good condition without any
damages, all screws are tightened in right positions.
Before opening the inverters, it must be disconnected with solar
array and Grid. In order to discharge completely from storage
capacitance, you can’t touch the inverter within at least 5
minutes after disconnection.
3. Require ent for Grid Connections
These inverters are only used for supply power for municipal
power grid, and don’t try to connect any other energy resources
with this inverter.
4. High Te perature Protection
During normal operation period, some parts (such as cooling
fins and cover) is heating. Sometimes it will reach 60℃. Please
don’t touch these parts to avoid scald.
Only qualified electricians are allowed to operate on the
inverter.
Only qualified electricians are allowed to install the
inverter.
Do not carry out any wiring and inspection or changing
components when the power supply is applied. Hazardous
voltages may still be present in the inverter even if the AC
and DC main switches are switched off. Wait at least 5
minutes after switching off the inverter. This ensures that the

Installation and Operation Manual 3
capacitors are electrically discharged.
This product can cause a DC current in the external
protective earth conductor. Where a residual
current-operated protective (RCD) or monitoring (RCM)
device is strongly recommend to use for protection in a case
of direct or indirect contact, only an RCD or RCM of Type B
is allowed on the supply side of this product;
Must be grounded before operation.
nsure the proper grounding of the inverter, otherwise, improper
connection or no grounding may cause stop of the inverter.
nsure reliable installation and electrical connection.
When the photovoltaic generator cells are exposed to light (even
if it is dim), the generator supplies DC voltage to the inverter.
The recommended solar modules need to comply with I C61730
Class A rating.
The grid-tied solar inverters are only for crystalline silicon solar
modules.
In order to protect the PC , user and installer, external DC and
AC circuit breaker shall be equipped at the end-use application;
The wiring shall be according local electric code. Choose proper
cable for power input and output lines. Input and output cable
shall be PV private cables suitable for outdoor use.
Only qualified cables under the local electrical safety laws and
regulations are allowed to connect.

Installation and Operation Manual 4
2 PV Inverter Overview
The inverter coverts DC current from solar units into AC current, and
feeds to Municipal lectrical Grid. The inverter is designed and
produced as per relative requirement of laws and regulations. The
shape and functions of relative parts is described as follows:
1．PV input ports
2．DC-Switch（option）
3．RS485
4．AC output port
5．Meter/DRM
6．WLAN/GPRS
7．LCD display panel
8．L D & Button

Installation and Operation Manual 5
3 Installation
3.1 Package
Please check carefully before opening the package of the equipment. It
may cause the inverter damage in case the packing material is found
damage, please contact with forwarder for claim. If necessary, Please
feel free to contact us.
PV inverter *1 Installation rack *1 xpansion Bolts*4 Screw*2
PV Plug *2 AC Plug *1 DRM cover*1 4Pin Terminal*2
User manual *1 Warranty Card*1 Screwdriver*1
Certificate of Approval *1

Installation and Operation Manual 6
3.2 Installation of Inverter
Please read the following installation instruction before you start your
work so as to achieve best effect of the inverter.
 Recommend using a sun shade minimizing direct sunlight, the
ambient air temperature should be lower than 40℃.
 Inverters should NOT be installed near inflammable and explosive
items. Any strong electro-magnetic equipment should be kept away from
installation site.
 Make sure the inverter should be kept at least 30CM away from other
stuff.
 Install inverter in the place where is not exposed to direct sunlight, rain
and snow.
 Make sure the flow of air around the inverter is not blocked, Do not
install in small closed spaces where air cannot circulate freely.

Installation and Operation Manual 7
3.3 Installation Location
 The inverter is suitable to be installed on vertical wall as shown
above.
 Don’t install inverter on forward tilt wall.
 Don’t install inverter on horizontal wall.
 Mount the inverter at height same as eyesight for easy operation and
data reading.

Installation and Operation Manual 8
3.4 Installation Procedure
 Figure 3.4-1 stick the installation formwork from the packing list
to the wall. Use Φ10 driller kit to drill installation holes with
reference of the following photo for the correct position.
 Figure 3.4-2 clean the dust inside the holes, and insert
expansion pipe into the holes. And then tighten 4 screws into
upper four pipes.
 Figure 3.4-3 hang the inverter onto the 4 tapping screws, and
check both sides and keep the inverter in right position, then
tighten two screws as shown in following pictures.
Figure 3.4-1 Figure 3.4-2
Figure3.4-2

Installation and Operation Manual 9
3.5 Electrical connection
Attention:
 The wire connection can only be done after the inverter is fixed in
proper position on the wall.
 Make sure the Max. Open circuit voltage and short circuit current of
solar arrays are not exceeded the stipulated range of the inverter.
 Select the inner diameter of 12AWG (4mm
2
) and the outer diameter of
Φ6mm of the photovoltaic cable as the connecting line of the PV input
terminal. Select the inner diameter of 12AWG (4mm
2
) and the outer
diameter of Φ13mm of the photovoltaic cable as the connecting line of
the AC output terminal. Cables should avoid high temperature, flame
and rain water whenever possible.
 During connecting the inverter, make sure no connection among AC,
DC and any power resources. They also can not be connected when
any accident occurs.
 Identify the polarity of wires and connection ports first, then connect
the inverter with solar arrays and municipal lectrical Grid.
 Only qualified cables under the local electrical safety laws
and regulations are allowed to connect.
Table: Wiring cable specifications
Model
DC input
AC output
Reco ended DC cable
Reco ended AC
KSG-3.2K-DM 2.5mm
2
-4mm
2
2.5mm
2
-6mm
2
KSG-4K-DM 2.5mm
2
-4mm
2
4mm
2
-6mm
2
KSG-5K-DM 2.5mm
2
-4mm
2
4mm
2
-6mm
2

Installation and Operation Manual 10
3.5.1 AC Cable Connection
Recommendation of AC cable: inner diameter is 12AWG (4mm²), outer
diameter is Ø10mm.
NOTE：
：：
：Disconnect the grid power (switch off breaker) so as to avoid any
reconnection by suddenness.
1．To strip off 26~28mm of
outer sleeve of t e cable, and
strip off 8.5±0.5mm of t e 3
wires.
2．Open t e water-proof
connector and wire,
sequentially t roug t e lock
nut, wire sealing body and
sleeve.
3．Put t e L, N and PE wires
into t e oles and fasten
correspondingly. Try to pull
out t e wires to c eck if
connection is firm enoug and
no loose connection.
4．Fix t e bus ing in order
and tig ten t e nylon
water-proof connector and
t en tig ten t e screw nut .
5．Dismantle t e connector:
Pus t e lock catc and rotate
anti-clock wise to take out t e
plug.

Installation and Operation Manual 11
3.5.2 PV Input Connection
Recommendation of PV input cable: inner diameter is 12AWG (4mm²)，
outer diameter is Ø6mm.
Connection of the connector:
Connector/socket unlocking process:
Conductor reconnection
1. Inserting the stripped conductor.
Cross-sections: 2.5 to 62 mm. Outside
diameter: 5.0 to 8 mm. Stripping length: 15
mm.
2. Close spring with the thumb or using
combination pliers. Please ensure that the
spring is closed. (See Fig.)
3. Push connectors together. Screw cable
gland tight. Screw in the nut until it reaches
the O-ring and then tighten it with at least 2
Nm using a suitable tool. Finished! (See
Fig.)
1. Insert screwdriver SZF1 or phase
tester in one of the illustrated positions.
2. Leave screwdriver inserted and remove
connector from socket.
1. Screw on the cable gland.
2. Lever open the interlock as shown in
the figure using the screwdriver.
3. Pull plug connectors apart.
4. Open spring with screwdriver and
remove conductor.

Installation and Operation Manual 12
3.5.3 Earth ter inal connection
The earth connecting terminal is on the side of inverter. The customer
should select to grounding base on site condition.
3.5.4 Miniature circuit breakers
It is recommended strongly to install circuit breakers or fuses at the DC
input and AC output to ensure safe installation and running.
 In order to protect the PC , user and installer, external DC
and AC circuit breaker shall be equipped at the end-use
application;
 The wiring shall be according local electric code. Choose
proper cable for power input and output lines. Input and
output cable shall be PV private cables suitable for outdoor
use.

Installation and Operation Manual 13
1- VCC
2- GND
3- 485A
4
-
485
B
3.5.5 Co unication cable connection
This product provides RS485/WLAN/GPRS communication modes.
RS485
The pin definitions of the RS485 port:
Pin Signal Assignment
1 (A)T/R+
2 (B)T/R-
3 N.C
4 N.C
5 Common
6 Common
7 5V
8 5V
WLAN/GPRS
Please purchase external WIFI/GPRS module from us if WLAN/GPRS
function is required on inverter.
WLAN/GPRS Port

Installation and Operation Manual 14
3.5.6 Power Li iting Device & DRED Installation
Connection method of Power Limiting device CT please refer to Figure
NOT :
Pin1-2 is used to make connection to CT device. You can find it in
accessory bag.
Pin3-8 is used to make connection to DR D device. If DR D device is not
available, please keep it not connected.
CT connection(Optional）
））
）
Black cable connect to CT+ (PIN 1)
Black and white cable connect to CT- (PIN2)
Open the CT, follow the arrow direction to Grid, put in the cable and lock.
PV panel
PV Inverter
Public power grid

Installation and Operation Manual 15
DRED Connection
1. Supported DRM command: DRM0, DRM5, DRM6, DRM7, DRM8.
2. Pay attention to the direction of CT when wiring. CT clip should be
locked tight. White /Black cable should connect Line 2, black cable should
connect Line 1. Tighten them with screwdriver. Make sure CT cables
connected to the right output phase lines of inverter when in use.
3. If CT is connected reversely, inverter will no output power when it enters
into on-grid status.
1234 5678

Installation and Operation Manual 16
XXXXX
XXXXXXXXXX
XXXXX
4 Operation of Inverter
LCD
Working LED
Error LED
Press button
System Info
Model: XXXXX
DSP: V1.0 ARM: V1.1
SN: XXXXXXXXXXXX

Installation and Operation Manual 17
4.1 Nor al Working Status
The following example shows the process when PV voltage is
increased from 120V:
Turn on the inverter, its model
and version will be displayed
first.
The input voltage is less
150V but higher than 120V,
the inverter will be in stand-
by status.
The input voltage is higher
than 150V, the inverter will be
in self-test status.
After self-testing, the
inverter will be in normal
working status (the data
only for reference).
Attention: Before connecting to DC, please make sure
input positive (+) and negative (-) connections are correct,
otherwise the component of inverter will be damaged,
which may cause the inverter in abnormal operation status.
System Info
Model: XXXXXX
DSP: V1.0 ARM: V1.1
SN: XXXXXXXXXXXX
S
tandby
Check ng 60 S
S
tandby
Check ng 00 S
Normal
Act ve PWR: 4993 W
Apparent PWR: 5004 VA

Installation and Operation Manual 18
4.2 Fault Status
Inverter is always under intelligent monitoring condition after it
gets started. It will become faulty status when any fault occurs (such
as municipal voltage is overload, frequency is over range) or
components failure. The faulty information can be displayed by LCD,
at that time the red L D is on.
4.3 Shutdown Status
When the output voltage from PV array is lower than a certain
threshold, the inverter will be in shutdown status. All LCD or L D
light will be off, and no energy from inverter fed to municipal Grid.
Meanwhile no energy consumption for inverter itself, any actions
on the keys (buttons) are invalid.
Error
Code No. F00
Gr d Under Volt

Installation and Operation Manual 19
4.3 LED Display
In the front panel, here are 2 L D displays: R D light and GR N light.
Under normal working condition, GR N light keeps on. The display
functions of these 2 L D lights are as follows:
Working (GR N light): it will be on during normal working status. But it
will be off during night time when no current is from solar Arrays.
rror (R D light): it will be on when fault alarm occurs or
components failure. If you like to realize more error information,
please refer to below chapters.
4.4 LCD Display
4.4.1 Button and Back Lighting Operation
There are two types of button press
 Short press means pressing the button less than 0.5 second
The short time press is used for page up, moving the cursor
 Long press means pressing the button more than 1 seconds
The long time press is used for locking the screen, selecting
item, setting and returning to upper menu.
The LCD back lighting will be turned off 180 seconds after the latest
button press operation. To lighten the LCD back lighting, please
press the button again.