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·
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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.