Jntech JNP2K2L-V5 User manual

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Solar Pump Inverter
User Manual
JNP2K2L-V5
JNP3KL-V5
JNP3K7L-V5
JNP4KL-V5
JNP 4KL-V5-CN-V1.2

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The copyright belong to Supplier
This document involves the proprietary and confidential information about Solar Pump
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.

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Preface
Manual Instruction
This manual describes the transportation, installation, operation, maintenance
and troubleshooting of the following JNP inverters:
●JNP2K2L-V5
●JNP3KL-V5
●JNP3K7L-V5
●JNP4KL-V5
For the convenience of the following description, “JNP2K2L 、JNP3KL 、
JNP3K7Land JNP4K“ is short for JNPxL .“Solar Pump Inverter” is short for
inverter in the following content. The inverter model shall be pointed specially,
when introduce the information about each model 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

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are shown in below.
Safety Symbol
Meaning
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.

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

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CONTENT
PREFACE........................................................................................................................... III
MANUAL INSTRUCTION.....................................................................................................III
TARGET READ ER ............................................................................................................... III
USE THE MANUAL............................................................................................................III
SYMB OL USED .................................................................................................................. III
1 SAFETY INSTRUCTIONS................................................................................................ 9
2 PRODUCTION INTRODUCTION ................................................................................. 14
2.1 SOLAR PUMP INVERTER INTRODUCTION .....................................................................14
2.2 PRODU CT ’SINTRODUCTION....................................................................................... 17
2.2.1 Appearance....................................................................................................17
2.2.2 Production Dimensions................................................................................18
2.2.3 Product Name............................................................................................... 19
3 INVERTER UNPACKING .............................................................................................. 20
3.1 UNPACKING CHECK...................................................................................................20
3.2 IDENTIFY INVERTER................................................................................................... 21
4 INSTALLATION PROCEDURE ......................................................................................23
4.1 PREPARE INSTALLATION TOOLS..................................................................................23
4.2 INSTALLATION STEPS................................................................................................. 24
5 INSTALLATION............................................................................................................. 25
5.1 INSTALLATION SITE REQUIRED ................................................................................... 25

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5.2 INSTALLATION DIRECTION......................................................................................... 26
5.3 INSTALLATION OF INVERTER.......................................................................................27
6 ELECTRICAL CONNECTION.........................................................................................30
6.1 CONNECTING TERMIN AL S OF INVERTER......................................................................30
6.2 SCHEMATIC DIAGRAM OF ELECTRICAL CON NEC TI ON .................................................. 31
6.3 CABLE SELECTION..................................................................................................... 33
6.4 AC SIDE ELECTRICAL CONNECTION............................................................................33
6.4.1 Single phase pump description.................................................................. 34
6.4.2 Capacitor removal example........................................................................36
6.4.3 Wire connection of the connector.............................................................37
6.5 DC SIDE CONNECTION ..............................................................................................39
6.6 WATER LEVEL SENSOR CONNECTION ......................................................................... 41
6.6.1 Water level sensor interface define.......................................................... 42
6.6.2 Water level sensor connection...................................................................43
6.7 COMMUNICATION CONNECTION................................................................................45
6.7.1 RS485 Communication.................................................................................45
6.7.2 GPRS Communication.................................................................................. 48
6.8 DISASSEMBLING........................................................................................................48
6.8.1Safety Instruction.......................................................................................... 48
6.8.2 Mounting and dismounting of cover panel............................................. 48
7 COMMISSIONING....................................................................................................... 50
7.1 VERIFY BEFORE COMMISSIONING.............................................................................. 50
7.2 INVERTER COMMISSIONING....................................................................................... 50
7.3 STOP FREQUENCY SETTING........................................................................................53
8 LCD PANEL OPERATING INSTRUCTIONS.................................................................55

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8.1 INVERTER LCD DISPLAY............................................................................................ 55
8.1.1 LED Indicator Direction............................................................................... 55
8.1.2 Description of Buttons.................................................................................56
8.1.3 LCD Display Interface Overview.................................................................57
8.2 INITIAL OPERATIONAL INTERFACE.............................................................................. 58
8.3 SYSTEM PARAMETER QUERY AND SETTING.................................................................. 60
8.3.1 Query information item description......................................................... 60
8.3.1.2 Basic Information......................................................................................62
8.3.1.4 Statistic Information................................................................................ 63
8.3.4 Parameter Setting........................................................................................ 73
8.4 Malfunction Description.................................................................................76
9 MALFUNCTION AND TROUBLESHOOTING............................................................. 79
9.1 TROUBLESHOOTING...................................................................................................79
9.2 MAINTENANCE ..........................................................................................................85
9.3 CONTACT CUSTOMER SERVICE...................................................................................86
10 APPENDIX A...............................................................................................................87
11 APPENDIX B...............................................................................................................89
11.1 QUALITY ASSURANCE..............................................................................................89
11.2 CONTACT US...................................................................................................... 90

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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 equipment, 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 Solar Pump Inverter must be done by professional
and technical person. Professional and technical person need:
●Received special training.
●Read this manual carefully and know the operation safety matters. Any damage
caused by improper installation or operation will be beyond the warranty scope.
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 does not have electrical connection with power before installation.

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Danger！
The solar cell arrays should be covered with opaque materials when installing the PV
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 switch on any breaker before all equipment is not fully connected well.

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Warning！
If inverter damage caused by the following circumstances will be beyond the warranty
scope.
●Ensure DC max. short-circuit current being in inverter allowable range when
configure PV arrays, otherwise, may cause non-recoverable damage.
●When the photovoltaic array is configured, it is necessary to ensure that the
open-circuit voltage of each photovoltaic group string does not exceed the
maximum DC input voltage of the inverter. The maximum DC input voltage of the
JNPXL series photovoltaic water pump inverter is shown in the technical
parameters of each type of inverter in the appendix.
Warning！
●It would affect the inverter performance and may cause inverter damage if the
installation environment is improperly.
●Don’t install the inverter in inflammable, explosive place or inflammable, explosive
materials storage place.
●Don’t install the inverter in place where is vulnerable to lightning strike.
●Don’t install the inverter in place where have heavy salt fog.
●When running the inverter, please ensure good ventilation.
●Inverter should be installed erectly, and ensure the heat sink, fans are without shelter.

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Notice！
●All electrical installation must comply with local and national electrical installation
standards
●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.
Running
Danger！
●When the AC side of the inverter is running with AC load, the DC connection cannot
be directly disconnected. Firstly, make sure that the inverter is shut down and there is
no AC output. Make sure there is no voltage between the AC input side and the DC
input side, then the AC and DC input side can be disconnected.
●Please don’t plug any connector when inverter is charged with power.
●Please don’t open the cover plate when inverter is charged with power.
Notice！
Only LCD display screen and DC switches can be touched when the inverter is running,
the heating devices (such as radiator, etc.) should not be touched to avoid scald.

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Maintenance
Danger！
●Maintenance should be done by professional maintenance technical person.
●Before maintenance, make sure to disconnect the electrical connection on the input
side of inverter, wait at least 5 minutes, Measure DC side and AC side voltage of
inverter with voltage meter, Make sure to operate without voltage on both DC and AC
sides

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2 Production Introduction
2.1 Solar Pump Inverter Introduction
Solar pump 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, Solar Pump Inverter, AC pump and water
storage device. Solar Pump 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. The JNPxL series solar pump inverters
increase AC input supplement function, on basis of traditional Solar pump
inverter. In the case of insufficient PV energy, the AC input energy can be
supplemented according to the demand to ensure the normal water supply of
users at night or cloudy days. This enables the system to operate under varying
solar isolation levels, and provide water throughout the day and through
different seasons. The solar Pump Inverter utilize a high efficiency MPPT
algorithm to maximize power harvested from PV module.
Warning！
Inverter can’t be connected with the PV array, which positive or negative is
grounded!

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Figure2-1 Solar pumping application system
Table2-1 Solar pumping application system list
No.
Name
Description
A
PV array
Monocrystalline silicon, Polycrystalline silicon.
B
Grid/Diesel
generator
Single phase AC source.(see the appendix of
each model for specific requirements)
C
Solar pump inverter
JNP2K2L-V5,JNP3KL-V5,JNP3K7L-V5,
JNP4KL-V5.
D
AC pump
Single phase or three phase AC pump.
E
Water storage
device
Can be the reservoir, fields etc.
Note!
When the photovoltaic water pump system is configured, it is necessary to

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ensure that the maximum power point voltage VMP of the photovoltaic array is
basically equal to or close to the AC rectifier voltage. That is, VMP ≈1.414*U
line, the input voltage of JNPXL series grid is single-phase input inverter U line
is single-phase AC voltage, for example, for JNPXL series single panel 30VMP,
11 in series, VMP =30*11=330V≈1.414*220=311.08V. If the configuration of the
photovoltaic array is not appropriate, the photovoltaic energy utilization rate
may be poor when the photovoltaic energy and AC energy are connected
simultaneously.

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2.2 Product’s Introduction
2.2.1 Appearance
Figure2-2 Appearance of Solar Pump 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
Terminals Cover
Including DC input terminal (PV+ 、PV-);AC input
terminal(AC IN); output terminal (MOTOR); sensor

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connection terminal (SERSOR) and communication
terminal(COM) under the cover.
3
Machine serial
No.
The serial number of the inverter, should be provided
during after-sales service
4
Nameplate
The basic parameters of the inverter are listed on the
name plate
5
Hanger
Used to hang the inverter on the bracket.
6
Radiator
Help the machine to dissipate heat. The temperature
of the inverter is high during operation. DO NOT
touch it!
2.2.2 Production Dimensions
Figure2-3 Dimension drawing of Solar Pump Inverter (unit : mm)

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Table2-3 Inverter dimension table
Model
Width(mm)
Height(mm)
Depth(mm)
Net weight（kg）
JNP2K2L-V5
278
370
125
6.5
JNP3KL-V5
278
370
125
6.5
JNP3K7L-V5
278
370
125
6.5
JNP4KL-V5
278
370
125
6.5
2.2.3 Product Name
The Naming of product, take JNP3K7H-V5 for example:
H：380V
L：220V
Power level
JN P 3K7H
Company name
Product series name

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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 commonly used accessories as
below:
Figure3-1 Inverter and standard fittings