Sandi Electric SDP-30KW Operating manual

Off
Off Grid Grid Inverter Inverter
Off
Off Grid Grid Inverter Inverter
User
User and and Installation Installation Manua Manual l
SD
SDP- P-30KW 30KW
Please
Please strictly strictly abide abide by by the the warning warning and and operating operating instructions instructions in in the the manual manual and and
machine,
machine, properly properly keep keep this this manual manual well well. .
Before
Before not not read read all all safety safety and and operation operation instructions, instructions, please please do don n’ ’t toperate operate the the
machine,otherwise
machine,otherwise it it will will damage damage to to the the equipment equipment and and cause cause personal personal safety safety
accident.
accident.

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Content
1 Safety Instructions………......................................……......…6
2 Production Introduction…………........................................…9
2.1 Summarize………………….............................................9
2.2 Product Introduction……………......................…….........9
2.3 Technical Description………....................………….......10
2.3.1 Working Principl………….……....………..…........10
2.3.2 Derating…............................................…..…......11
2.3.3 Product Feature.......................………………........12
3 Inverter Unpacking………………...........…………..…….......13
3.1 Unpacking Check……………….........……………….......13
3.2 Identify Inverter………………........……………..…........13
4 Installation Procedure……………..……..……………….....…14
4.1 Prepare Installation Tools………………............………….......14
4.2 Installation Steps…………………..........…….…………….....15
5 Installation ………............................................…………16
5.1 Installation Site Required …… ............................…..16
5.2 Installation Direction….……….. ...................……… 16
5.3 Installation of Inverter. ………… ............ ...... ……… .1 7

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5. 4 N ot i ce … …… … …… … … .. .. . .. . .. … … .…… … .. . … . …. 18
6 Electrical Connection ……………… ...................... …..….19
7 LCD Panel Operating Instructions ….…........... .……… .... 21
7.1 LCD display description ……………….. .......…......... 21
7.2 Indicator of LED light function ………… ........ ….….. 21
7.3 Fault Code…………..…....................................…...22
7.4 LCD Displ a y Interface Overvi e w … .. .... . . …… … … … 2 2
8 LCD Panel Operating Instructions .. …… .…............ …… .. 23
9 Malfunction and Troubleshooting……………........……………28
9.1 Troubleshooting………………………………….……28
9.2 Maintenance…………………………………………...29
10 Warranty Conditions……………..………..……………..........31
11 Te ch ni ca l Pa ra me te rs …… …… …… …… … …… .… .. . .. .. .3 2

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Preface
Manual Instruction
This manual includes the description regarding the troubleshooting in process of
transportation, installation, maintenance and operation of the following SDP-xx
inverters:
● SDP-30KW
In order to describe convenient later, SDP-30KW Off grid inverter will be short
for inverter. When introduce the information about each inverter type in detail,
pointed out the inverter type alone.
Target Reader
This manual apples to the inverter installation person and professional
engineering technology person of operation and LCD interface operation person.
Use the Manual
Please read this manual carefully before starting installation and operation. Please
keep this manual for operation and maintenance in future.
The manual content will continue to update, amend, but unavoidably exist
slightly discrepancy or error with material object. Users to purchase products,
please kind prevail.
Symbol Used
The following safety symbols may be used in this manual, they represent the
meaning of below.

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Symbols on the inverter:
Symbol
Meaning
Ground Protection
Refer to related instructions
Cannot discard the inverter together with waste of life.
Beware of dangerous electrical voltage.
The inverter operates at high voltages!
CE mark
The inverter complies with the requirements of the applicable EC
guidelines.
SAA mark
The inverter complies with the requirements of the applicable
Australia guidelines.
Safety Symbol
Meaning
Danger!
If ignore the security warning, it may lead to serious accidents
of injuries.
Warning!
If ignore the security warning, it may cause serious injury
accident, equipment damage or major business interruption
risk.
Notice!
If ignore the security warning, it may cause moderate injury
accident, moderate damage to the equipment or part of the
risk of business interruption.
Note!
The content is the body of the additional information.

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1. Safety Instructions
For electrical and electronics equipment, security is concerned with the
whole process of installation, commissioning, operation and maintenance.
Therefore, incorrect or wrong operation will damage the operator or third party's
life or safety, or the inverter equipment. In order to reduce the casualties, inverter
and other equipment damage, operation and maintenance process must strictly
abide by all of the following danger, warning, and pay attention to the safety
information such as tips.
Warning！
All the installation and operation of SDP-XX series inverter must be finished by
professional technical person.
● Receive special training.
● Complete to read this manual and master related safety attentions of operation.
Any damage to the equipment caused due to failure to comply with the
descriptions in this manual in installation or operation will be beyond the scope
of the company's quality guarantee.
Before installation
Notice！
When received products, need to check the inverter if there is any damage during
transportation, and if found the problem please immediately contact us or contact
transportation company.
Installing
Before installing inverter, make sure the inverter not have electrical
connections and electricity.
Danger！
The solar cell arrays should be covered with opaque materials when installing
the photovoltaic arrays during the day, otherwise the solar cell arrays will
generate high voltage, causing person casualties.

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Warning！
If inverter installation environment improper selection, it will affect the machine
performance and may cause machine damage.
Don’t install the inverter in inflammable, explosive place or inflammable,
explosive materials storage.
Don’t install the inverter in explosive dangerous place.
Don’t install the inverter in place where vulnerable to lightning strike.
Don’t install the inverter in place where have more salt fog.
Danger！
Before electrical connections, ensure that the solar cell arrays are covered with
opaque materials, otherwise the solar cell arrays will generate high voltage,
causing person casualties.
Electrical connections
Warning！
All the operating and wiring work should be operated by professional electrical or
mechanical engineer.
Warning！
When running inverter, need ensure well-ventilated.
Inverter should be upright installed and ensure heat sink, fan etc. without shelter.
Warning！
Please don’t open any breakers before all equipments are not completely
connected well.
Notice！
All the electrical installation must meet the electrical installation standard of local
and country.
Warning！
Please don’t open any breakers before all equipments are not completely
connected well.

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Notice！
In order to make sure safe running, ask for proper grounding, using appropriate
conductor size and providing short circuit protection.
Notice！
Connection cable must selection suitable specification, firm connection and good
insulation.
Running
Danger！
Under AC side of inverter take with loads, can’t directly break DC connection,
need cut off the inverter start switch firstly and break AC output breaker, ensure
that it has no voltage in AC side, then can break DC connection.
Danger！
Please don’t connected any terminal connectors under inverter charged state!
Please don’t open the cover plate under inverter charged state!
Notice！
When the inverter is running, only LCD display screen and front panel DC
switches, AC switches, start switch can be touched, can’t touch the heating devices
(such as radiator, etc.) to avoid scald.
Maintenance
Danger！
Maintenance work must be done by professional maintenance technical person.
Danger！
Before checking and maintaining, please must break Start switch, AC side
breaker, then break DC side breaker, after waiting 5 minutes, measured DC side
and AC side voltage with a multimeter, ensure that have no voltage between DC
side and AC side to operate.

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2. Product Introduction
2.1 Summarize
Our SDP series off grid inverter is one of the most advanced DC to AC
conversion products in the world, it is suitable use for areas without electricity,
backup batteries system, solar energy, wind turbine and other renewable energy
systems etc, can supply power and provide guarantee effectively for the areas
with traffic inconveniences, in the mountains, pastoral, border, island and other
areas without electricity. It has the main advantages of high quality sine wave AC
output, microcomputer control, humanness design, and it is high efficiency and
low no-load loss, and no pollution. The inverter can also supply AC power to all
kinds of electric equipment, air conditioners, electric motors, refrigerators,
fluorescent lights, televisions, electric fans and other industrial power supply.
2.2 Production Introduction
2.2.1 Production Appearance
Figure2-1 Appearance of SDP off grid inverter

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Table2-1 Inverter appearance information table
2.2.2 Product Name
The way of product naming, take SDP-30KW for example:
2.3 Technical Description
2.3.1 Working Principle
The principles of SDP series off grid inverter please refer to the schematic below.
No.
Name
Introductions
1
LCD display
screen
Man-machine interface, you can check the converter
operating information through LCD display screen, also
can set some function and parameters of converter.
2
Lock
The lock of converter used to open and lock
3
PG Cable
Glands
The input wire and output wire through this cable
glands
4
Wheels
Wheels for moving the converter
5
Start switch
Used to Starting and break the converter
6
Breakers
AC input breaker and AC output breaker
7
Connection
terminals
Including AC input terminal; AC output terminal;
8
PE(grounding)
Earth wire of cabinet
9
Name plate
converter basic parameters listed on the nameplate for
basic information about converter.
Product Model
SDP - 30KW
Output Power

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Figure2-2 Internal circuit structure diagram of SDP off grid inverter
2.3.2 Derating
Reduce the output power is a way to prevent inverter overload or some potential
problems. When the operating environment temperature and altitude are too high,
both can cause inverter derate operation.
Environment temperature too high
Inverter temperature derating curves in below
Figure2-3 Inverter temperature derating curve
η=（Pout/Pnom）x100
T is environment temperature
Pout is the off grid inverter actual max. output power
Pnom is the off grid inverter allowed max. output power

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2.3.3 Product Feature
Using the sixth generation efficient IPM intelligent module from Japanese
Mitsubishi, high efficiency and stable performance. It with powerful
protection function for short circuit, over load and over temperature which is
more safe and reliable. It’s service life can up to 15-20 years or more.
Intelligentized, modularized and simple structure design, very easy and
convenient for maintenance.
Two kinds of start mode: Step Down Voltage Start and Variable Frequency
Start. Customer can set start mode according to the type of their load. This
function is very convenient for users and also reduce frequency converter’s
usage, save more cost and easy to connect wires and control.
The output frequency 50Hz/60Hz can be set via LCD panel.
The output voltage can be set between -40 % to +20 % of rated voltage. And
the accuracy of output voltage is very high less than 1%.
The DC input voltage range can be set. over-voltage point, under-voltage
point, over-voltage recovery point, under-voltage recovery point and under
voltage recovery time all can be set via the LCD panel. Convenient for
increasing or reducing the quantity of batteries and solar panel in the future.
Using SVPWM space vector algorithms, high conversion efficiency, high
instantaneous power and low losses, higher efficiency > 94%.
Pure sine wave output. with good transient response less than 50MS, little
harmonic distortion, higher conversion efficiency and stable output voltage.
Low frequency transformer, which ensure the AC busbar and DC busbar are
completely isolated to avoid interference, high efficiency and very little
no-load loss.
Powerful data display and fault instruction function. LCD can display the
DC input voltage, output frequency, phase voltage, phase current, AC bypass
input voltage, output power KWH, time and date, temperature, fault code
display.
Wide input voltage can be set according to customer’s requirement. Input
voltage range can be selected from 100-400v or 200-600v or 400-850v. This

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wide voltage input off grid inverter can work without battery and solar
charge controller, which save battery cost and same like with MPPT function
can maximum make full use of solar power.
AC bypass input function optional: Battery Power Priority or AC Bypass
Priority work mode can be set.
RS485 remote monitoring function optional
Solar charge controller and AC to DC battery charger built in optional for
customer
Can be customized to customer’s specification.
European CE (EMC and LVD) certification, accredited by Australian CEC,
ERAC energy network.
3. Inverter Unpacking
3.1 Unpacking Check
The product has been tested and checked carefully before transportation, but
damage may be caused during transportation, therefore, the product should also
be checked carefully before installation.
● Please check whether inverter outer packing is in good condition;
● After unpacking, please check whether the equipment is in good condition;
● According to the packing list to check whether all the parts is correct and in
good condition.
If any damage is found, please contact us or the transportation company. Please
keep well the photos taken at the damaged parts and we’ll provide you with best
and fastest services.
3.2 Identify Inverter
There is nameplate in the side of inverter, the nameplate shows the
inverter model, some important parameter and certificate mark.

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Figure3-1 Inverter nameplate
Table3-1 Nameplate information table
Note！Photos are for reference only, please adhere to the original
products!
4. Installation Procedure
4.1 Prepare Installation Tools
Before installation, need to prepare first.
Inverter installation and wire installation will need the following tools.
You also can choose the right tools according to your own experience
NO.
Description
1
Product name
2
Inverter model and parameter information
3
Inverter factory number
4
Certificate and safety signs, concrete meaning as “Preface”

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Table4-1 Installation tools list
4.2 Installation Steps
Tools ready, follow these steps to install
Table4-2 Installation process table
Sketch map
Name
Recommend
specification
Function
Wire
crimpers
6~50mm2
Used for crimping input and
output terminals connected to
the wires
Cross
screwdriver
Ф8
Used for the input and AC
output wires installation
Installation
steps
Installation instruction
Reference
chapters
1
Before installation, check whether the inverter is in
good condition;
Whether the product fittings are complete
Whether the installation tools and spare parts are
complete
4.1
2
Whether the installation environment meets the
requirements
1
Read the manual, especially the "safety
instructions”
1
3
Choose the best installation location
5.1
Installation
5.2
4
Electrical Connection
DC side wire connection
6.1
AC side wire connection
6.2
5
Configuration parameter
10
6
Troubleshooting
9

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5 Installation
5.1 Installation Site Required
Inverter installation site environment has very important influence to the safe
operation, the performance and life of the inverter. Install the inverter before,
need to choose the right installation site.
● All installation must comply with local standards.
● Do not install the inverter at a flammable or explosive place or a place
where the flammable or explosive materials are stored.
● Do not install the inverter in a place where there is a risk of explosion.
● Do not install the inverter in places where the inverter is vulnerable to
lightning strike.
● Do not install the inverter in a higher salt spray environment
● Inverter installation site must be in good ventilation, do not install the
inverter in the case closed, otherwise the inverter will not work properly.
● Inverter protection level is IP20, can be installed indoor, when the inverter is
installed indoor, should be installed as far as possible in the eaves or other
have the shadow place, avoiding direct sunlight, rain and snow.
● Inverter is installed indoor, keep away from Windows, avoiding lightning
● The installation place selected should be solid enough to support the
inverter weight for a long period.
● The site for inverter installation must be clean and the ambient temperature
must be maintained within -25 to +50°C.
● Inverter installation site relative humidity should not be more than 95%,
water vapor may corrode inverter, and damage the internal components
● The inverter must be installed in a place convenient for observation and
maintenance
● Don't install the inverter in living area, the inverter will produce some
noise when running, influence daily living.

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5.2 Installation Direction
● The inverter should be installed vertically.
● Do not install inverter tilted forwards.
● Never install the inverter horizontally.
● The installation place of inverter should be convenient for operation and
reading out of the LCD displayed information
● Do not install the inverter in a place where children can touch.
● The inverter uses fan cooling mode and the installation site selected should
ensure the minimum installation spacing between the inverter and the fixed object
and the nearby inverters to ensure an good ventilation. And in front of the inverter
need to keep enough space, is convenient to check the LCD display information.
5.3 Installation of Inverter
5.3.1 Check the front panel breakers are in "OFF" state, check whether there is a
short circuit on load.
5.3.2 DC input cable must be through from the DC input terminals, correctly
connect to the positive and negative pole of the machine, attention can’t be
reversed.
5.3.3 Absolutely prohibit DC input power supply connect to the inverter output
terminal.
5.3.4 The connection cable between the battery and inverter should be as short as
possible, otherwise the harmonic leakage current from cables will be harmful to
inverter and the system equipment.
5.3.5 System grounding terminal must be grounded, and make the ground wire’s
length as short as possible. Do not allow welding machine, motor and other high
current device in this system common ground. Ensure all system’s ground wires
are separately layout from high current electrical equipment.
5.3.6 Be careful of the positive pole and negative pole of battery input, which
can’t reverse.
5.3.7 Turn on the DC input breaker, if the breaker happen to the trip at the first
time, it’s a normal phenomenon, because the capacitor is charging.

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5.3.8 Please don’t turn off DC input breaker under the inverter with load,
otherwise it will cause DC input breaker damaged.
5.3.9 When the machine happen MOD, overload fault alarm, turn off the DC
input breaker to restart the machine.
5.3.10 Put the inverter on ventilated and away from sunlight, confirmed the
machine and wall distance is greater than 30cm.
5.3.11 Don’t block the vents, if found the vents blocked, please clean up in time.
5.3.12 When the inverter is running normally and temperature is rising. If the fan
stop working, please replace the fan in time. (The starting temperature of the fan
is 45°C).
5.3.13 Recommend to turn on the output circuit breaker firstly, then turn on start
switch. Make the inverter starting load, can effectively avoid the damage of large
inrush current to the machine.
5.3.14 Don’t connect ground wire (PE) of cabinet and neutral wire (N) together.
Note!
Please don’t break the DC Input Breaker often, otherwise it will cause will cause
DC input breaker damaged. If you want to shut down the inverter, just need turn
off the AC output breaker and Start switch. If you have to turn off the DC input
breaker, please turn off the start switch, then AC Output Breaker to make inverter
stop working, then turn off the DC Input breaker.
Notice！
Never connect several inverters in parallel output!
Danger！
Ensure that all cables are not charged before electric operation!
5.4 Notice
5.4.1 All operations of equipment must be done by professionals, please remove
metal jewelry on hands before the operation in case of electric shock !

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5.4.2 The inside cooling fan of the machine is controlled by temperature, it’s a
normal phenomenon that the fan is not running when inverter just start soon or
taking little load, the fan only will run when cabinet internal temperature exceeds
45 ℃.
5.4.3 When the machine is working, in case of accidents and to avoid electric
shock, please don’t open the cover of cabinet.
5.4.4 Please don’t make change to the circuit line privately when regular
checking, in case of damage.
5.4.5 It’s a normal phenomenon that the inverter has a certain degree of fever
during the use process, but should keep the environment of installation ventilated,
cooling and clean, especially can’t block air ventilator.
5.4.6 The inside all CMOS components of the machine can’t touch, when the
circuit is powered on don’t connect or disconnect the wires and terminals.
5.4.7 After connect all wires, please must be carefully check (voltage value,
positive and negative pole are consistency, grounding is well).
5.4.8 Even if the all switch on the panel is OFF, but inverter’s part of capacitor
still electric, please don't touch.
5.4.9 When take with motor and pump or other inductive loads, the inverter had
best leave 30% of the power margin, should be considered the impact current to
the machine, to ensure reliable power supply to inverter
6 Electrical Connection
The electrical connection should be carried out immediately when the installation
is completed. When making electrical connection, special attention should be
payed to the following operating specification:
Warning！
All the electrical connection must meet local electrical connection standard.
Only qualified electrical personnel can perform the wiring installation work.
Incorrect wiring operation may cause operating casualties or equipment
damage permanently.

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Before electrical connection, please make sure that the AC side and DC
side are uncharged!
Ask for correct grounding, using appropriate conductor and providing
necessary short-circuit protection to ensure safe operation.
Please don’t turn on any breakers before all the equipment unfinished
connection.
6.1 Connecting Terminals of inverter
The input and output terminals are installed in the bottom of the inverter and
include DC side input terminals and AC side output terminals.
Figure6-1 Connection terminals on inverter
Table 6-1 Terminals Description
Terminals
Description
Battery positive input terminals
Battery negative input terminals
L1,L2, N
AC Input terminals, connect with AC grid
L1,L2, N
AC Output terminals, connect with AC load
PE
Earth Wire
Warning！
The positive and the negative mustn't be misconnected.