Jntech JNF1KLF-A/24V User manual

I
PV Off Grid Inverter with
Hybrid Controller
User Manual
Hefei Jntech New Energy Co.,Ltd.V1.0

II
Content
1.Safety Instruction......................................................................................................1
1.1 Safety identification.........................................................................................1
1.2 Safety instruction .............................................................................................2
2.Production Introduction...........................................................................................4
2.1 Household PV off-grid Power Generation System Introduction.....................4
2.2 Production Introduction ................................................................................... 5
2.2.1 Appearance Introduction.........................................................................5
2.2.2 Production Dimensions...........................................................................6
3.Inverter & Controller Unpacking Installation.......................................................7
3.1 Unpacking Inspection ......................................................................................7
3.2 Prepare Installation Tools................................................................................8
3.3 Hanging-mounted Installation .........................................................................8
3.4 Electrical connection......................................................................................10
3.4.1 PV Input Connection.............................................................................10
3.4.2 AC Input Connection............................................................................11
3.4.3 Battery Connection ...............................................................................14
3.4.4 AC Output Connection .........................................................................16
3.4.5 Communication Connection .................................................................17
4.Commissioning........................................................................................................18
4.1 Electrical Connection Inspection before Commissioning..............................18
4.2 Charging Commissioning ..............................................................................18
4.2.1 PV Charging Commissioning.....................................................................18
4.2.2 Grid Power Charging Commissioning..................................................19
4.3 Inverter & Controller Output Commissioning...............................................19
4.3.1 Battery Power’s Inverting Output .........................................................19
4.3.2 Grid Pass-by Output..............................................................................20
4.3.3 Diesel Generator Pass-by Output..........................................................20
4.4 Union Commissioning...................................................................................21
4.5 LCD Panel Operating Instructions.................................................................22
4.5.1 LCD display..........................................................................................22
4.5.2 LCD Display Interface..........................................................................23
4.5.3 LCD Display Content ...........................................................................24
4.5.4 LCD Display Function Information and Basic Operation....................25
5.Common Troubleshooting and Maintenance.......................................................32
5.1 Troubleshooting.............................................................................................32
5.2 Maintenance...................................................................................................34
6.Appendix A..............................................................................................................35
7.Appendix B..............................................................................................................38
8.Appendix C..............................................................................................................40
9.Appendix D..............................................................................................................41

1
1.Safety Instruction
1.1 Safety identification
The following safety symbols may be used in this manual, and the meanings 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.
Danger
Means that if connect polar wrong,will cause machine
damage
Note
Means that the content is additional information.
Inverter related symbol
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. Be careful in operation.
CE certification marks. It means that inverter complies with
the requirement of CE certification.
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.

2
1.2 Safety instruction
Warning！
All the installation operation on the machine must be completed by the
professional and technical personnel. The professional and technical personnel shall:
- through specialized training.
Please read this manual and master the operation of the relevant security matters
completely.
If not in accordance with the manual installation and operation of the machine is
damaged.It will not in the scope of the warranty.
○
1Before installaion
Notice！
When you receive the product, please check the damage of the whole
machine during the transportation. If you find any problems, please contact
Hefei Jntech new energy Co.,Ltd. or transportation company immediately
○
2Installing
Ensure inverter not have electrical connections and electricity before installing.
Warning！
If inverter damage caused by the following circumstances will be beyond the
warranty scope of our company.
●The photovoltaic array configuration, ensure the DC side short-circuit current
in the machine within the allowable range, otherwise it may cause irreversible
damage to the machine.
●The photovoltaic array configuration, ensure each PV string open circuit
voltage should not exceed 140V, otherwise it will cause irreversible damage to
the machine
●The improper selection of the installation environment of the machine will
affect the performance of the machine and may cause damage to the machine
●Do not install the machine in flammable, explosive or flammable and
explosive articles are stored place
●Do not install the machin in an explosive place
●Do not install the machine in areas where lightning strikes may occur
●Do not 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.

3
Electrical connection：
Warning！
●All the operation and wiring work should be operated by professional
electrical or mechanical engineer.
●Please do not close any circuit breakers until all devices are fully connected
Notice！
●All electrical installation must comply with local and national electrical
installation standards.
●In order to ensure the safe operation, require proper grounding, the use of
appropriate size conductor and provide short circuit protection necessary.
●the connection cable must select the appropriate specifications, firm
connection and good insulation.

4
2.Production Introduction
2.1 Household PV off-grid Power Generation System Introduction
Household PV off-grid power generation system consists of PV array、solar
mounting structure、storage battery、Grid（Diesel Generator）、PV off-grid inverter
with controller and conventional household loads. Use PV solar panel transform solar
energy into electrical energy, meanwhile use solar controller store electrical energy
into battery, inverter can transform battery’s DC power into 115V AC power and
230V AC power to drive household loads work.
This system can meet the demands of electric power in the areas that without
grid electricity or lack of electricity.
Meanwhile, in the area of having Grid power and Diesel Generator input, the
system can manage power automatically, which ensure household loads work
regularly and reduce use-cost.
Figure 2-1 Domestic Used Off Grid Power System Exploded View
115V
230V
Battery
AC Input
Inverter with
controller
COM
TB
NO NC
PV Input
Heavy
Load
Light
Load
Computer

5
2.2 Production Introduction
2.2.1 Appearance Introduction
78
6
5
4
2
3
1
Figure 2-2 Production Appearance
Diagram2-1 Production Appearance Information
Serial Number
Name
Description
1
PV Input
Input terminals，connect with PV array.
2
AC Input
Connect with grid power or Diesel Generator.
3
Battery Terminals
Connecting with battery array.
4
LCD display
Display current working status and parameter modify
functions.
5
AC output
AC loads output：L1 is light load output firing line，
L2 is household heavy load firing line，N is AC zero
line, PE is ground protection line.
6
Control Interface
TB is the connecting interface of temperature sensor,
be used to monitor battery’s temperature to prolong
battery lifespan；NONC is dry contactor control
terminal, for example can connect with diesel
generator and control its start.
7
Communication
Interface
RS485 communication function, can connect with
communication transform equipment, to monitor the
working status of the whole system.
8
Power Button
Inverter & Controller’s power button

6
2.2.2 Production Dimensions
Figure 2-3 Inverter & Controller Dimensional Drawing (mm)
Diagram 2-2 Inverter & Controller Size and Weight Sheet
NO.
Model No.
W(mm)
H(mm)
D(mm)
W(kg)
1
JNF1KLF-A/24V
485
365
235
17
2
JNF1K5LF-A/24V
485
365
235
18
3
JNF2KLF-A/24V
485
365
235
27
4
JNF3KLF-A/48V
485
365
235
28
5
JNF4KLF-A/48V
500
365
235
30
6
JNF5KLF-A/48V
500
365
235
35
Depth
Width
Hight

7
3.Inverter & Controller Unpacking Installation
3.1 Unpacking Inspection
To ensure system installation goes smoothly, pls do checking before unpacking.
Specific inspection items are as follows:
●Checking whether the outer packing is in good condition.
● Unpacking, and checking up the products damage or not.
● Contrast to packing list, to check whether all accessories is correct and in good
condition.
Standard inverter & controller and some common used accessories are as follows,
specific models and qty. please check up with installation list.
Figure 3-1 Inverter & Controller and standard parts
Diagram 3-1 Inverter & Controller and Accessories sheet
Serial No.
Illustration
Dispatch status
1
Inverter & Controller
Standard configuration
2
MC4 PV connector
Standard configuration
3
Cool pressing terminal
Standard configuration
4
Expansion bolts
Standard configuratin
5
PV connector dismounting tools
Standard configuration
6
Phoenix terminal
Standard configuration
7
L type terminal in battery side
Standard configuration
8
Installation list
Standard configuration
9
Certificate
Standard configuration
10
User manual
Standard configuration
1
6
234 5
1098
7
X1 X6 X6 X4 X1
X1X1 X1X2X1

8
3.2 Prepare Installation Tools
Inverter & controller installation and guide line installation tool are as follows，
installation workers need to use tool as per request of follow sheet without any
mistake.
Diagram 3-2 Installation Tool List
Diagram
sketch
Name
Recommend
ed spec.
Function
Flat screwdriver
Φ2
use for cable installation
Cross screwdriver
φ4
use for cable installation
hydraulic tongs
M2.5~M8
use for cool pressing terminal
installation
Crimping Pliers
M2.5~M8
use for connecting with battery
terminals
Monkey spanner
300mm
use for nut assembly, inverter&
controller installation
Impact drill
φ8
use for drilling hole and inverter &
controller installation
wire stripping pliers
M1.5~M8
use for connecting PV cable
hammer
6Pounds
use for tunking setscrew
3.3 Hanging-mounted Installation
Inverter & Controller’s hanging-mounted installation should be controlled the
angle range of vertical and horizontal be 80°-90°, as follows,
Figure 3-2 Hanging-mounted Installation Demonstration Figure
80°
90°

9
Step 1: Please check the installation situation, to ensure its convenient installation and
heat dissipation, we suggest leave up and down gap size at least 300mm, while right
and left side each 500mm, front side 300mm.
Step 2: Mark up the installation hole, according to it, drill 4 holes (Diameter: 10mm;
Depth: 80mm). As shown in the figure:
Figure 3-3 Hang position diagram
Follows are wall hanging sizes of different inverter & controller models：
Diagram 3-3 Fixed position sizes chart
Fixed position size
Model of Inverter & Controller
L：459mm
H：245mm
JNF5KLF-A/48V
L：454mm
H：200mm
JNF1KLF-A/24V JNF1K5LF-A/24V JNF2KLF-A/24V
JNF3KLF-A/48V JNF4KLF-A/48V
Step 3：Refer to follow installation method to finish the installation.
Figure 3-4 Installation operation diagram
300mm L:459mm
Or456mm
H:245mm
Or144mm
300mm
500mm
500mm
300mm
1.Use churn drill to punch about dia.80mm hold
on the location of wall or panel board.put setscrew
into hole.
2.Screw out nut,hang on inveter with controller,use
monkey spanner to tighten nut,then finish installation of
inverter with controller.

10
3.4 Electrical connection
Under the condition of the meet the installation conditions, can carry on
electrical connecting operation. Please ensure electrical connection’s air-switch and
cable model can meet system demands, specific selection model sheet are as follows:
Diagram 3-4 Air-switch and cable model selection
Air-switch selection（C）
Cable selection（AWG）
Model No.
PV
AC
BAT
Load1
Load2
PV
AC
BAT
Load1
Load2
JNF1KLF-A/24V
25
10
40
6
6
10
15
7
16
16
JNF1K5LF-A/24V
25
16
63
10
10
10
13
6
15
15
JNF2KLF-A/24V
25
16
80
16
16
10
13
5
13
13
JNF3KLF-A/48V
50
25
63
16
16
8
10
6
13
13
JNF4KLF-A/48V
63
32
80
20
20
6
9
5
12
12
JNF5KLF-A/48V
63
40
100
25
25
6
7
4
10
10
Above diagram, the selection of C shows normal type auto breaker ,after C Digital
said over rated current; cable selection in AWG American Standard refers to the
diameter of the cable wire.
3.4.1 PV Input Connection
Step 1: Do the following inspections before PV side terminal connecting:
（1）Please make sure system’s DC air-switch is in off state, before connecting
with PV array.
（2）Please ensure PV array’s polarity be matched with PV connectors’polarity,
to avoid inverter & controller damage.
（3）To ensure PV array’s max open-circuit voltage must less than inverter &
controller’s max allowable input voltage.
Step 2: To make PV connectors and cable connecting of PV input side, please
according to following steps:

11
Figure 3-5 PV Array Terminal Making and Connecting Diagram
Step 3: During cable connecting of PV input side, insert PV cable of PV array into
auto Air-switch respectively according to positive pole and negative pole; Then insert
the two cables which made in Step 2 into Air-switch separately.
Step 4: Check whether PV connecting is correct and firm.
The cable connection diagram of PV input side is as follows:
PV Input
Terminal
+
—
PV
Figure 3-6 PV Input Side Cable Connecting Diagram
3.4.2 AC Input Connection
Inverter & Controller can accept two kinds of AC power input, one is single
phase grid power, the other is single phase diesel generator power. Please select
corresponding connection mode doing the specific connection.
3.4.2.1 Grid Power Input connection
Please make sure Grid power in off state.
1.Use wire stripping pliers to strip
10mm,then use Crimping Pliers to
press terminal. 3.Insert waterproof terminal into inverter
separately,finish making and connecting
pv side terminal.
2.Insert pressed cable into waterproof
terminal,pls note positive pole and
negative pole,tighten nut.
10mm

12
Step 1: Please according to follow methods, making Grid power side cable connection
and connectors.
Figure 3-7 Grid Power Side Connectors Making and Cable Connecting Diagram
Step 2: When finished above inspections, keep AC side air-switch in off state, insert
grid power side’s cables into air-switch according to L1 (fire wire), L2( fire wire) and
N (zero wire) separately.
Step 3: Then insert cables which were made in Step 2 into AC air-switch accordingly.
Grid input side cable connecting diagram as follows:
Figure 3-8 Grid Input Side Cable Connecting Diagram
3.4.2.2 Diesel Generator Connection
Please ensure inverter & controller in power off state.
Step 1: Refer to diesel generator’s user manual, to find its start mode is NO (normally
open) or NC ( normally close) .
1.Use wire stripping pliers to
strip 10mm,then use Crimping
Pliers to press terminal.
3.Use cross opener to tighten screw,then
cover and tighten protective cover,finish
power grid terminal connection.
2.Insert pressed cable into protective
cover.
10mm
Grid Input
Terminal
L1
N
Grid
L2

13
Step 2:If diesel generator’s start mode is NO (normally open), then insert diesel
generator’s NO terminal into inverter & controller’s NO terminal accordingly; If
diesel generator’s start mode is NC (normally close), then insert diesel generator’s NC
terminal into inverter& controller’s NC terminal accordingly; Ensure the connecting
of NO-NO or NC-NC is correct, specific connection mode, please refer to follows for
details.
Figure 3-9 Diesel Generator Terminal Making and Cable Connecting Diagram
Step 3: Connecting diesel generator’s AC output with inverter & controller’s AC
input, specific operation please refer to grid power input side cable connection.
Diesel generator input side cable connection diagram as follows:
Figure 3-10 Diesel Generator Input Side Cable Connecting Diagram
1.Use wire stripping pliers to
strip 10mm. 3.Insert tightened terminal into inverter
No end female seat or NC end female
seat,finish diesel generator terminal
making and connecting.
2.According to starting signal of diesel
generator，insert cable into NO terminal
or NC terminal，Use flat screwdriver to
tighten screw.
10mm
10mm
NO NO NO
NC NC NC
Control Interface
Terminal
Diesel
Generator
NC NO
AC Input Terminal
L1
N
L2

14
3.4.3 Battery Connection
3.4.3.1 Battery Input Side connection
（1）Inverter & Controller in switch off state.
（2）Ensure battery side’s air switch in off state.
（3）Avoid battery being short circuit during its installation.
Step 1: According to nameplate to confirm the battery pack voltage, JNTECH PV
hybrid power generating system’s battery pack voltage could refer to follow sheet.
Diagram 3-5 Battery Pack Voltage Selection List
Battery Pack Voltage
Inverter & Controller Model No.
24V
JNF1KLF-A/24V JNF1K5LF-A/24V JNF2KLF-A/24V
48V
JNF3KLF-A/48V JNF4KLF-A/48V JNF5KLF-A/48V
Step 2: Cable making and connecting, please refer to follow method:
Figure 3-11 Battery Terminal Making and Connecting Diagram
Step 3:Keep battery side air switch in off state, first insert the cables of battery side
into the above air- switch according to their positive and negative pole; Then put one
end of cable which be made in step 2 into the above air-switch, the other end of cable
into battery terminals (avoid battery’s positive and negative pole connection, during
cable connecting operation); Battery input side cable connecting diagram as follows:
1.Use wire stripping pliers to strip
10mm，then use Crimping Pliers to
press L type cool pressing terminal.
3.Use cross opener to tighten screw,then
cover and tighten protective cover,finish
battery terminal connection.
2.Insert pressed cable into protective
cover.
10mm

15
Battery Input Terminal
+
—
Battery
Figure 3-12 Battery Input Side Cable Connecting Diagram
3.4.3.2 Battery TB Side Connection
Inverter & controller is in power off, switch off state.
Step 1: Measure line distance between TB side to battery pack, choose suitable length
cable.
Step 2: Make TB side terminals according to following method,
Figure 3-13 TB side terminals making and cable connecting diagram
Step 3: Insert one end of temperature sensitive line into control interface terminal, the
other end of inductor be fixed on the batteries with glue. Control interface TB side’ s
cable connecting method is as follows:
1.Use wire stripping pliers to
strip 10mm cover. 3.Insert tightened terminal into inverter
female seat,finish making and connecting
of TB end.
2.Insert cable into terminal,use cross
operner to tighten screw.
10mm
Glue fixation
Storage
battery pack
TB

16
Figure 3-14 TB Side Cable Connecting Diagram
3.4.4 AC Output Connection
Inverter & controller is in power off, switch off state.
Step 1: Making AC output side terminals according to following method:
Figure 3-15 AC loads terminals’ Making and Cable Connecting Diagram
Step 2: AC Output side have two Lines: L1 (Emergency load fire wire) and L2
(Heavy load fire wire). Each line have one air-switch, ensure these two air-switches in
switch off sate, then insert the above AC output cables into their corresponding air-
switch.
Step 3: Then insert one end of the cables which made in Step 1 into related air- switch,
the other end of cable into inverter & controller’s AC output terminals : L1 terminal
or L2 terminal.
AC output side’s cable connecting diagram as follows
Load
L1
L1
L2 Heavy Load
Light Load
PE
N
L2
N
1.Use wire stripping pliers to strip
10mm，then use Crimping Pliers to
press L type cool pressing terminal.
3.Use cross opener to tighten screw,then
cover and tighten protective cover,finish
Ac load connection.
2.Insert pressed cable into protective
cover.
10mm

17
Figure 3-16 AC Output Side Cable Connecting Diagram
Illustration!
Over load is forbid for PV hybrid inverter & controller.
3.4.5 Communication Connection
Step 1: Before communication interface connecting, please check follows items:
(1) Ensure PV hybrid inverter & controller is in power off, switch off state ;
(2) Please clear the communication interface, ensure there is no foreign matters.
Step 2: Making communication interface terminals according to following methods:
Figure 3-17 Communication Interface Terminal Making and Cable Connection Diagram
Step 3: Connecting the needed communication appliances (such as computer,
communication module,ect) with inverter & controller through COM interface.
Follows are control interface connection figure:
Figure 3-18 Control Interface Connecting General Diagram
1.prepare one piece
communication cable,common
use cable is ok. 3.Impression drawing.
2.Insert communication cable into
inverter communication terminal
end.
COM control terminals
Converter Compute
r

18
4.Commissioning
4.1 Electrical Connection Inspection before Commissioning
Before commissioning, electrical connection inspection should be done strictly，
to ensure safety of the inverter & controller as well as the personal safety; To prevent
accidents, specific inspection items as follows:
（1）Check whether the PV open circuit voltage is within the allowable voltage range
of the inverter & controller;
（2）Check if the PV positive and negative poles are correct;
（3）Checking AC input connection is firm or not;
（4）Checking whether the battery voltage is within the allowable range of the
inverter & controller;
（5）Checking the negative and positive pole of battery be right;
（6）Checking AC output side is firm and correct ;
（7）Checking control interface is firm and correct.
4.2 Charging Commissioning
4.2.1 PV Charging Commissioning
Please ensure that commissioning is doing in sunny condition, specific operation
steps as follows:
Step 1: Turn on air-switch of battery pack;
Step 2: Turn on air-switch of PV input side, waiting about one minute, check the LCD
indicator light lighten or not, then check the LCD display status, shown as follows:
Figure 4-1 PV Charging LCD Diagram
Step 3: LCD display PV charging status is normal, turn off the PV input side
air-switch, finish PV charging commissioning.
Upv 79.3V
12.6AIpvchg
ON/OFF