Jntech JNP550L-V5 User manual

User Manaul
Solar Pumping Inverter
JNP550L-V5
JNP750L-V5
JNP1K1L-V5
JNP1K5L-V5
JNP2K2L-SE-V5
JNP2K2L-SE-V5-EN-V1.0

The copyright belong to Supplier.
This document involves the proprietary and confidential information about Solar
pumping inverter of Supplier. It strictly prohibited to disclose the document by
duplicating, photocopying, publishing online and in other forms without supplier’s
permission.
Supplier. reserves the right to change details in this publication without
notice.

I
Preface
Manual Instruction
This manual describes the transportation, installation, operation,
maintenance and troubleshooting of the following JNP inverters:
●JNP550L-V5
●JNP750L-V5
●JNP1K1L-V5
●JNP1K5L-V5
●JNP2K2L-SE-V5
In order to describe conveniently later, JNP550L-V5, JNP750L-V5,
JNP1K1L-V5, JNP1K5L-V5, JNP2K2L-SE-V5 will be short for JNPxL, Solar
pumping inverter will be short for inverter. The inverter type shall be pointed
alone, when introduce the information about each type of inverter in details.
Target Reader
This manual applies to the professional engineering and technical person
who is responsible for installing and operating of inverter and LCD panel.
Use the Manual
Please read this manual carefully before installing and operating inverter.
Please keep this manual well for operation and maintenance in future.
The manual content would be constantly updated and revised, but it
unavoidably has slightly discrepancies or errors with real inverter, please
kind prevail if user purchases our inverter.
Symbol Used
The following safety symbols may be used in this manual, and the meanings
are shown in below.
Safety
Symbol
Meaning

II
Danger!
Means that it may lead to serious accident of injuries, if
safety warning is ignored.
Warning!
Means that it may lead to serious accident of injuries,
equipment serious damage or main business interruption, if
safety warning is ignored.
Notice!
Means that it may lead to moderate accident of injuries,
equipment moderate damage or part of the business
interruption, if safety warning is ignored.
Note!
Means that the content is additional information.
Inverter related symbols:
Symbol
Meaning
Direct current (DC)
Alternating current (AC)
Protective grounding
Refer to relevant instructions
Can not discard inverter together with domestic garbage
Beware of dangerous high-voltage.
Should wait for 5 minutes after inverter and PV panel are disconnected,
then inverter only can be touched.
Beware of hot surface.
The inverter temperature can exceed 60℃during operation. Please don’t

III
touch the surface to avoid scald.
CE certification marks. It means that inverter complies with the
requirement of CE certification.

IV
CONTENT
PREFACE ................................................................................................ I
MANUAL INSTRUCTION ................................................................................. I
TA RGET READER .......................................................................................... I
USE THE MANUAL ........................................................................................ I
SYMBOL USED ............................................................................................ I
1 SAFETY INSTRUCTIONS .........................................................................1
2 PRODUCTION INTRODUCTION ...............................................................5
2.1 SOL AR PUMPING SYSTEM INTRODUCTION .................................................... 5
2.2 PRO DUC T ’SINTRODUCTION ..................................................................... 7
2.2.1 Appearance ................................................................................ 7
2.2.2 Production Dimensions................................................................ 9
2.2.3 Product Name............................................................................10
3 INVERTER UNPACKING .......................................................................11
3.1 UNPACKING CHECK ...............................................................................11
3.2 IDENTIFY INVERTER ...............................................................................12
4 INSTALLATION PROCEDURE .................................................................14
4.1 PREPARE INSTALL ATION TOOLS .................................................................14
4.2 INSTALLATION STEPS .............................................................................14
5 INSTALLATION ................................................................................... 16
5.1 INSTALLATION SITE REQUIRED..................................................................16
5.2 INSTALLATION DIRECTION .......................................................................17

V
5.3 INSTALLATION OF INVERTER ....................................................................18
6 ELECTRICAL CONNECTION ...................................................................21
6.1 CONNECTING TERMINALS OF INVERTER ......................................................21
6.2 SCHEMATIC DIAGRAM OF ELECTRICAL CONNECTION ......................................22
6.3 CABLE SELECTION .................................................................................24
6.4 AC SIDE ELECTRIC AL CON NECTION ...........................................................24
6.5 DC SIDE CONNECTION ...........................................................................27
6.6 WATER LEVEL SENSOR CON NECTION .........................................................29
6.6.1 Water level sensor interface define.............................................29
6.6.2 Water level sensor connection ....................................................31
6.7 COMMUNICATION CONNECTION ...............................................................34
6.7.1 RS485 Communication ...............................................................34
6.7.2 GPRS Communication .................................................................36
6.8 DISASSEMBLING ...................................................................................36
6.8.1Safety Instruction .......................................................................36
6.8.2 Disassembling of Connector .......................................................37
7 COMMISSIONING ............................................................................... 38
7.1 VERIFY BEFORE COMMISSIONING..............................................................38
7.2 INVERTER COMMISSIONING ....................................................................38
7.3 STOP FREQUENCY SET TING .....................................................................41
8 LCD PANEL OPERATING INSTRUCTIONS ................................................43
8.1 INVERTER LCD DISPL AY .........................................................................43
8.1.1 LED Indicator Direction ..............................................................43
8.1.2 Description of Buttons ...............................................................43
8.1.3 LCD Display Interface Overview ..................................................44
8.2 INITIAL OPERATIONAL INTERFACE .............................................................46
8.3 SYSTEM PARAMETER INQUIRY AND SETTI NG .................................................48

VI
8.3.1 Description of inquiry information item ......................................48
8.3.1.1 Operation information ............................................................48
8.3.1.2 Basic Information....................................................................49
8.3.1.4 Statistic Information ...............................................................50
8.3.3 Information inquiry..................................................................58
8.3.4 Parameter Setting......................................................................60
9 MALFUNCTION AND TROUBLESHOOTING ............................................. 64
9.1 TROUBLESHOOTING ..............................................................................64
9.2 MAINTENANCE ....................................................................................72
9.3 CONTACT CUSTOMER SERVICE .................................................................73
10 APPENDIX A..................................................................................... 74
11 APPENDIX B ..................................................................................... 76
11.1 QUALITY ASSURANCE ..........................................................................76
11.2 CONTACT US .................................................................................77

1
1 Safety Instructions
For the electrical and electronics equipment, safety relates to the whole process of
installation, commissioning, operation and maintenance. Therefore, incorrect use or
operation would damage the life and personal security of operating person or the third
party, and inverters.
In order to reduce casualties, damage of inverter and other equipments, user or
operating person should strictly abide by all the safety information tips of danger,
warning and notice which are in the process of operating and maintaining.
Warning！
All the installation and operation of JNPxL series Solar pumping inverter must be
completed by professional and technical person. Professional and technical person
need:
●Receive special training
●Read this manual completely and master the operation related to safety matters.
Any damage caused by improper installation or operation which do not according
to the introduction in this manual will be beyond the warranty scope of supplier.
Before installation
Notice！
User should check the inverter if there is any damage during transportation. Please
contact Supplier or transportation company immediately if some problems of inverter
are found.
Installing
Ensure inverter not have electrical connections and electricity before installing.

2
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.
Electrical connections
Danger！
Ensure that the solar cell array should be covered by light tight materials, before
electrical connecting, otherwise, the solar cell array would produce high voltage under
the sun to cause casualties.
Warning！
●All the operation and wiring work should be operated by professional electrical or
mechanical engineer.
●Please do not close switch on breakers before all the equipments are not fully
connected well.

3
Notice！
●All the electrical installation must meet the electrical installation standard of local
and country.
●In order to ensure safe running, proper grounding, using appropriate conductor
size and providing short circuit protection are required.
●Connection cable must select suitable specification, firm connection and good
insulation.
Warning！
If inverter damage caused by the following circumstances will be beyond the warranty
scope of our company.
●Ensure that the max. short-circuit of DC side is in the inverter allowable range
when configuring PV arrays, otherwise, inverter may be caused non-recoverable
damage.
●Ensure that the open circuit voltage of JNPxL shall not exceed 450V when
configuring PV arrays, otherwise, inverter may be caused non-recoverable
damage.
●It would influence the machine features and may cause machine damage if the
installation environment is selected improperly.
●Do not 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 much salt fog.
●When running the inverter, please ensure good ventilation.
●Inverter should be installed erectly, and ensure the heat sink, fans etc. are without
shelter.

4
Running
Danger！
●AC connection should not be turned off directly when AC side of inverter with
loads, DC connect need to be turned off firstly, and ensure that it has really no
voltage, then DC connection should be turned off.
●Please don’t plug any connectors under inverter charged state!
●Please don’t open the cover plate under inverter charged state!
Notice！
Only LCD display screen and DC electrical connecter can be touched when the
inverter is running, the heating devices (such as radiator, etc.) should not be touched to
avoid scald.
Maintenance
Danger！
●Maintenance should be done by professional maintenance technical person.
●Please ensure that AC side breakers should be turned off firstly, then DC side
breakers should be turned off before checking and maintaining, after waiting at
least 5 minutes, should measure DC side and AC side voltage with a voltage
meter, to ensure that operation under the circumstance of no voltage between DC
side and AC side.

5
2 Production Introduction
2.1 Solar pumping System Introduction
Solar pumping system is different from traditional AC pumping system, which
takes use of solar cells to convert solar energy into electricity.
It consists of 4 parts: PV modules, PV Pump Inverter, 3 phases AC pump or
single phase AC pump and water storage device. Solar Pumping Inverter
converts DC power produced by PV module into AC power required by the
pump motor. A microprocessor inside continuously monitor available energy
levels and adjust pump speed, matching energy required to energy available.
This enables the system to operate under varying solar isolation levels, and
provide water throughout the day and through different seasons. The PV
Pump Inverter utilize a high efficiency MPPT algorithm to maximize power
harvested from PV module.
On the basis of traditional PV pump inverters, the JNPxL series inverter has
increased the AC input supplementary function. Under the condition of
insufficient PV energy, the AC input energy can be supplemented according
to the needs, so as to ensure the normal water supply at night or cloudy day.
Warning！
Inverter can’t be connected with the PV array, which is positive or negative
grounded!

6
A
BCDE
Figure2-1 Application system diagram
Table2-1 Solar pumping system list
No.
Name
Description
A
PV array
Monocrystalline silicon, or Polycrystalline silicon.
B
Grid power or
Diesel
Generator
Single phase AC power
C
Solar pumping
inverter
NP550L-V5,JNP750L-V5,JNP1K1L-V5,
JNP1K5L-V5, JNP2K2L-SE-V5.
D
AC pump
Single phase or three-phase AC pump.
E
Water storage
device
Can be the reservoir, fields and etc.

7
Note ！
When doing solar water pump system configuration, it is necessary to ensure
that the Vmp of the PV array is basically equal to or close to the AC rectifier
voltage. That is, Vmp ≈1.414 * U wire (use a multimeter to measure the
voltage between any two phases in three-phase electricity, that is, U wire), for
example, Vmp of PV Module is 30V, and 18pcs in series, the Vmp of PV string
is 30 * 18 = 540V ≈1.414 * 380 = 537.3v.
If the configuration of PV array is not appropriate, when PV energy and AC
energy are connected at the same time, the utilization rate of PV energy shall
be poor.
2.2 Product’s Introduction
2.2.1 Appearance

8
Figure2-2 Appearance of Solar pumping inverter
Table2-2 Inverter appearance information table
No.
Name
Introductions
1
LCD display
screen
Man-machine interface, you can check the inverter
operating information through LCD display screen,
also can set some function and parameters of
inverter.
2
Connection
terminals
Including DC input terminal (PV+、PV-); AC input
terminal (AC in); output terminal (MOTOR); sensor
connection terminal (SERSOR);. communication
(COM) terminal
3
Machine serial
No.
Machine factory number, when need after-sales
service should provide the number.
4
Nameplate
Inverter basic parameters listed on the nameplate
for basic information about inverter.

9
5
Hanger
Used to hang the inverter on the bracket.
6
Radiator
Help machine heat dissipation, the temperature is
higher when inverter is running, don’t touch!
2.2.2 Production Dimensions
Figure2-3 Dimension drawing of solar pumping inverter (unit: mm)
Table2-3 Inverter dimension table
Inverter type
Width(mm)
Height(mm)
Depth(mm)
Net weight
（kg）
JNP550L-V5
278
370
125
JNP750L-V5
278
370
125
JNP1K1L-V5
278
370
125
JNP1K5L-V5
278
370
125

10
JNP2K2L-SE-V
5
278
370
125
6.3
2.2.3 Product Name
The way of product naming, take JNP2K2L for example:
H: 380V
L: 220V
Power level
JN P 2K2 L
Company name
Product series name

11
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 Supplier. or the transportation
company. Please keep well the photos taken at the damaged parts and we’ll
provide you with best and fastest services.
Supplier. supply the standard inverter and some commonly used accessories
as below:
Figure3-1 Inverter and standard fittings
Note！
Photos are for reference only, please adhere to the original products!

12
Table3-1 Inverter and fittings table
No.
Description
Status
1
Solar pumping inverter
Standard
2
Signal terminal block
Standard
3
Cold-pressed terminal (SC4-5)
Standard
4
Cold-pressed terminal (SC6-5)
Standard
5
Expansion bolt(M6*60)
Standard
6
Water level sensor B
Optional
7
Quick Installation Guideline
Standard
8
Packing list
Standard
9
Water level sensor A
Optional
10
Certificate of inspection
Standard
3.2 Identify Inverter
The nameplate in the side of inverter, and it shows the inverter model, some
important parameter and certificate mark.