Jntech JNP370L Original operating instructions

Quick Installation
用户手册
Solar pumping inverter
JNP370LS-V1
JNP550LS-V1
QI-JNP-550LS-V1-EN-V1.0

·I·
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.

·II·
Contents
Quick installation guideline JNP370L/LS JNP550L/LS...................................3
1 Inverter unpacking....................................................................................... 3
2 Installation procedure...........................................................................4
2.1Prepare installation tools....................................................................4
2.2 Installation Direction and spacing dimension.....................................4
2.3 Installation of Inverter........................................................................5
3. Electrical Connection.................................................................................. 6
3.1 Connecting Terminals of Inverter....................................................... 6
3.2 Cable Selection for Electrical Connection ......................................... 7
3.3 AC Side Electrical Connection........................................................... 7
3.4 DC side connection........................................................................... 8
3.5 Inverter grounding........................................................................... 10
3.6 Water Level Sensor Connection...................................................... 10
3.6.1 Water level sensor interface define....................................... 10
3.6.2 Water level sensor connection............................................ 11
4. Disassembling.......................................................................................... 13
4.1 The Disassembling of PV Connector............................................... 13
5. Commissioning......................................................................................... 14
5.1 Verify before Commissioning........................................................... 14
5.2 Inverter first commission .................................................................16
6 Appendix: Troubleshooting........................................................................ 17

Quick installation guideline JNP370L/LS
JNP550L/LS
1 Inverter unpacking
Check according to Packing List whether all the parts are correct and in good
condition or not. Accessories are shown as below:
No
Description
No
Description
1
Solar pumping inverter
6
Sensor and communication
connector (Option)
2
Blue ring tool
7
Packing list
3
Expansion bolt
8
Water level sensor A
4
PV connector
9
Quick installation guideline
5
PV connector
10
Water level sensor B
11
Certification of inspection

2 Installation procedure
2.1Prepare installation tools
The following tools will be needed during inverter installation and wire connection.
Sketch map
Name
Recommend
specification
Function
MC4 wire
crimpers
M2.5~M8
Used for PV connector
wire core pressure
welding.
Electric drill
Ф8
Used for inverter
installation plate fixed hole
drilling.
Straight
screwdriver
Ф3
Used for the AC wire
installation.
Cross
screwdriver
Ф5
Used for disassembling
inverter cover.
Hammer
6 pound
Used for expansion
bolt
2.2 Installation Direction and spacing dimension
The inverter shall be installed vertically or tilted backwards with a maximum
angle of 10°

The minimum installation spacing dimensions are shown below:
Direction
Minimum space
Direction
Minimum space
Above
100cm
Sides
100cm
Below
100cm
Front
100cm
2.3 Installation of Inverter
Step 1：
Drill holes in the selected
installation position with
1200mm for two holes of Ф8
Step 2:
Use hammer to make
expansion bolt in the holes
Step 3:
Hang the inverter in the wall,
tighten with expansion nut
120mm

3. Electrical Connection
3.1 Connecting Terminals of Inverter
Input and output terminals is on the bottom of the inverter, including DC input
and AC output terminal, RS 485 communication and water level sensor
terminals, shown as below:
Terminals description
Terminals
Description
PV+/ PV-
PV array DC positive/negative input terminals
MOTOR
Output terminal, connect with AC pump
SENSOR
Water level sensor signal input terminal (optional)
Grounding terminal

Model
Recommended parameters of DC circuit breaker
JNP370L
440VDC,20A
JNP370LS
440VDC,20A
JNP550L
440VDC,20A
JNP550LS
440VDC,20A
Notice!
1. It must be DC breaker, it’s prohibited to be
replaced by AC breaker;
2. Shown as right side picture DC breaker
should be 2 stages.
3.2 Cable Selection for Electrical Connection
User can select cables for electrical connection according to the following
specifications.
Model
Cable range（AWG）
DC side
AC side
PV+、PV-
U、V、W
PE
JNP370L
14-12
14-12
12
JNP370LS
14-12
14-12
12
JNP550L
14-12
14-12
12
JNP550LS
14-12
14-12
12
3.3 AC Side Electrical Connection
Step 1: AC connectors plug into Inverter bottom AC side terminal, tighten
PV+
PV+
PV-PV-
DC Breaker

connectors. From AC connectors there are U,V,W wires to connect with AC
pumps U,V,W wires.
3.4 DC side connection
Danger!
When carrying the out connection between PV array and inverter, the PV array should
be covered with opaque materials and the DC-side circuit-breaker should be
disconnected, otherwise, the PV array may generate dangerous voltage, cause
casualty. The Non-professionals do not make the connection operation.
Step1: Please connect the wire of DC connector according to the following
steps:
Operation instruction
Operation demonstration
1．Unscrew the fastening nuts of MC4
Connector.

2．Strip off the DC cable insulation layer
to a length of approx. 7mm. Insert the
exposed end of PV Cable into the
connector tube, and press tightly with
wire crimpers.
Effect figure. Remember! ! ! Terminals
and connectors match the core, is not
reversed.
3．Pull the above finished cable with
tube through the fastening nut.
4．Plug it into the wiring slot until a
sound being heard, which indicating
plug into the right place. Then tighten
the nut.
Effect figure
Step2: Plug the positive and negative connector into the corresponding
terminals at the bottom of the inverter respectively.

3.5 Inverter grounding
Make sure Inverter grounding terminals is properly connected with grounding.
3.6 Water Level Sensor Connection
3.6.1 Water level sensor interface define
Water level sensor connector pins in inverter panel port are defined are
shown below:

Terminal（SENSOR）
connector pin
Detail
DG
Dry protection pin.
SY
Overflow protection pin.
COM
Dry protection and Overflow protection common pin.
3.6.2 Water level sensor connection
Two kinds of water level sensor you can select are shown below:
Sensor ASensor B
If you selected water level sensor A, then water sensor installation method is
shown below:

B1 connect white cable
B2 connect green cable
A2 connect green cable
A1 connect black cable
Water level sensor
connector
Note: Both yellow shrub-
like hammer, you need
filled water, when you
install sensor A
Detailed figure of sensor A
Installation figure of sensor A

If you selected water level sensor B, then water sensor installation method is
shown below:
connect green cable
connect black cable
connect green cable
connect white cable
Water level sensor
connector
A:the Installation location of
overflow water level
sensor.
1. B:the Installation
location of pump dryed
water level sensor.
2. C:Pump outlet.
3. S about 1-3 m .
For dry protection, the end with cable
of sensor should be upwards
For over-
flow protection, the end with cable of
sensor should be downwards.
Detailed figure of sensor B
4. Disassembling
4.1 The Disassembling of PV Connector
Please operate according to following:
Operation instructions
Demonstration picture

DC SWITCH should be OFF before operation,
and This blue ring tool shall be used to
disconnect MC4
Step 1: Putting blue ring tool into the hole of
the MC4 totally, as shown on the picture.
Step 2: it will be taken apart easily.
5. Commissioning
5.1 Verify before Commissioning
PV Arrays
The PV array should be checked before operating the inverter, and to ensure
that the positive and negative mustn’t be misconnect, otherwise, the damage
may be caused to the inverter. Make sure that the open-circuit voltage of
photovoltaic array doesn’t exceed the required voltage.
DC Input
Make sure that the DC terminals of the inverter are connected correctly and
maintained consistent with the PV array.
AC Output
Make sure inverter AC output terminal is properly connected and phase
sequence is properly connected, and the protection ground of the system is
properly connected to PE.

Figure5-1 LED Display
Table5-1 LED&Key Indicator Direction
LED
Indicator
Name
Color
Instructions
FAULT
Faulty light
Red
Fault light, the system can not recover
the fault, (when the fault occurs and
the fault is not eliminated, the light is
on).
STATE
STATE light
Yellow
When the system is in abnormal state,
the light will be on, such as
photovoltaic under voltage, system
dry, overflow
WARN
WARN light
Red
When the system is in abnormal state,
the light will be on, such as
photovoltaic under voltage, system
dry, overflow system can recover fault,
and the light will be on
RUN
Running
light
Green
Light on under normal operation.
POWER
Power light
Green
Light on When power on.

ON/OF
“ON/OFF”
Press once to stop; long time press for
1s to get it started.
5.2 Inverter first commission
Choose suitable weather, with enough sunshine, and make sure the normal
operation of your solar pumping system. Try to ensure that inverter work
under high output power, high output frequency as much as possible. Please
make sure the following condition before commissioning.
●Ensure that the inverter is connected correctly to the AC motor.
●Ensure that the polarity of PV arrays is correct.
●Ensure that ac inputs R, S and ground connections are correct.
●Check whether the system pipeline is unobstructed or not;
●Switch on the DC-side circuit breakers.
After finishing the above steps, then begin initialization.
Auto model:
●Inverter default setting isAuto model, when inverter power
on, Inverter power indicator light will be on, inverter will auto
operate, POWER and RUN light will be on, inverter start to
work.
●After inverter operate, if RUN light turn off and other indicator
light turn on, means inverter have fault,detailed
troubleshooting method check out in Appendix.
Manual mode:
●Inverter default setting is Auto mode, if need to manual turn
on off, need to operate through button. Press for over 3S,
inverter turn on, press “ON/OFF” button together, inverter will be turn
off.

6 Appendix: Troubleshooting
Shutdown status and troubleshooting
Condition
code
Condition
Name
Phenomena
Cause
value
Troubleshooting
State light
on
PV Array
undervoltag
e
Inverter
shutdown
when the fault
appeared and
will
automatically
restart after it
disappear.
Out put
energy from
array
changes.
Please check the
input voltage from
array and make sure
this voltage inside
inverter input voltage
range.
Note: In cloudy days,
morning, or down,
this situation is not
malfunction.
Note!
1. During operation, inverter will note down operation mode of last time power off, If
manual turn off, need to turn on manually next time, if last time is auto turn off, inverter
will auto turn on when power on.
2. Inverter “ON/OFF” is touch botton, do not press hard!
Note!
1. AC pump motor and inverter phase sequence must be corresponding, if
misconnection, will get no or less water output. When this happen, should turn off
inverter, exchange U V W any two phases, then power on again.
2. First commission must check phase sequence is correct connected.
3. If choose single phase inverter, every time when inverter is power on again, inverter
will be auto winding detection, after detection successfully, RUN light will turn off for 60S
then turn on again.

PV array
overvoltage
Inverter
shutdown
when the fault
appeared and
will
automatically
restart after it
disappear.
Out put
energy from
array
changes.
Please check the
input voltage from
array and make sure
this voltage inside
inverter input voltage
range.
Note: In cloudy days,
morning, or down,
this situation is not
malfunction.
Dry alarm
Inverter shut
down until the
water level
recover or
protection
recover time is
up, the
machine will
restart
automatically.
Water level
of source is
lower than
low-level
water level
sensor,
even lower
than inlet of
pump.
1. Please check the
water level, if the
water level is ok,
please check if there
are air inside pump.
2. Please check the
position of water
level sensor.
Weak
sunshine
Inverter
shutdown.
When
malfunction
disappear,
inverter can
restart
automatic.
Array output
low.
Usually appears in
early morning, dusk
and cloudy days.
This situation is aim
to protect the motor
of pump and
lengthen the lifetime.
Overflow
alarm
Inverter shut
down until the
water level
recover or
protection
recover time is
up, the
machine will
restart
automatically.
Water level
in container
higher than
high-end
level sensor.
If this situation
appears more than
once, please check
onsite and set the
water level sensor at
a proper height.

Output
over-load
Inverter
shutdown and
will restart
automatically
after the fault
disappears.
Load higher
than rated
output
power of
inverter.
Please make sure
the system is proper
designed. The power
of pump motor
should not be larger
than inverter output.
Inverter AC
output over
current
Inverter
shutdown and
will restart
automatically
after the fault
disappears.
1. Power
capacity of
pump motor
is higher
than rated
output.
2. Pump
motor
locked-roto
r, or
damaged.
3. Pipe
system
design is not
reasonable.
1. Please inspect
whether pump motor
is normal.
2. Please inspect
whether pipeline
system is in
accordance with
water pump or not.
3. If this happen
frequently, please
contact SUPPLIER.
Output
phase lose
Inverter
shutdown and
will restart
automatically
after the fault
disappears.
Phase loss
in inverter
output.
1. Please check if
the output wires are
proper connected
and fixed.
2. If this happen
frequently, please
contact the supplier.
Warn light
on
Busbar
voltage
undervolta
ge
Inverter
shutdown and
will restart
automatically
after the fault
disappears。
PV array
output
changes;
pump
damage;
inverter
hardware
damage.
1. Please check the
input voltage from
array and make sure
this voltage inside
inverter input voltage
range;
2. Check if pump
motor damage;
3. Check if inverter
hardware damage.