MasterPower OMEGA 2.2KW LS User manual

OMEGA
2.2KW LS (Low PV Input Range)
Solar Inverter for Water Pump Version: 1.3
User Manual

Table Of Contents
ABOUT THIS MANUAL ......................................................................................................................................1
Purpose............................................................................................................................................................1
Scope...............................................................................................................................................................1
SAFETY INSTRUCTIONS...................................................................................................................................1
Inspection.........................................................................................................................................................1
Installation........................................................................................................................................................1
Operation .........................................................................................................................................................2
Maintenance ....................................................................................................................................................2
INTRODUCTION.................................................................................................................................................3
Features...........................................................................................................................................................3
Basic System Architecture...............................................................................................................................3
Product Overview.............................................................................................................................................4
INSTALLATION...................................................................................................................................................5
Unpacking and Inspection................................................................................................................................5
Preparation ......................................................................................................................................................5
Mounting the Unit.............................................................................................................................................5
PV Connection.................................................................................................................................................6
AC Input Connection........................................................................................................................................7
AC Output (Motor) Connection ........................................................................................................................8
Final Assembly.................................................................................................................................................9
Remote Communication Connection.............................................................................................................10
Control Signal Connection (Optional) ............................................................................................................10
COMMISSIONING.............................................................................................................................................11
OPERATION......................................................................................................................................................12
Power ON/OFF ..............................................................................................................................................12
Operation and Display Panel.........................................................................................................................12
Parameter Setting..........................................................................................................................................13
Fault and Warning Code .................................................................................................................................18
Fault Reference Code....................................................................................................................................18
Warning Reference Codes.............................................................................................................................19
SPECIFICATIONS.............................................................................................................................................20

1
ABOUT THIS MANUAL
Purpose
This manual describes the assembly, installation, operation and troubleshooting of this unit. Please read
this manual carefully before installations and operations. Keep this manual for future reference.
Scope
This manual provides safety and installation guidelines as well as information on tools and wiring.
SAFETY INSTRUCTIONS
WARNING: This chapter contains important safety and operating instructions. Read and
keep this manual for future reference.
Inspection
If missing components or damaged inverter is found after receiving, please do NOT install or operate it.
Otherwise, it may cause human injury or equipment damage.
Installation
1. Before installation, please make sure if the voltage range of PV panel and AC input voltage range meet the
requirement.
2. Check if all wires are firmly connected without short circuit. Otherwise, it will cause equipment damage.
3. Do NOT install this inverter under direct sunlight because high temperature may cause equipment damage.
4. Please install the inverter away from inflammable and explosive objectives. Please ensure no liquid can
enter the inverter.
5. Please install the inverter on metal non-combustible surface.
1. CAUTION!! Only qualified personnel can install and operate this inverter.
2. To reduce risk of electric shock, disconnect power source before making wire connection. Otherwise, it may
cause electrical shock.
3. To reduce risk of electric shock, NEVER touch any terminals on electric circuits.
4. If connection cable between inverter and water pump is more than 50m, please be sure to install an AC
reactor. Please choose single phase AC reactor if it’s single phase water pump. Choose three-phase AC
reactor if it’s three-phase water pump. Inductance value for each phase is about 1mH. Otherwise, water
pump would be easily to be damaged.

2
Operation
1. Only after wire connection is complete and put cover back to the inverter, it’s ok to do commissioning.
Otherwise, it will cause electric shock
2. If sunlight is sufficient but little water is pumped, maybe the wires on motor connection are reversely
connected. Please reverse any two wires of them.
3. When testing water pump, be sure to install water pump at appropriate water level. Never allow water
pump in dry running. Otherwise, the inverter will activate protection.
Maintenance
1. Only qualified personnel can maintain, repair, inspect the inverter and replace any components.
2. It may still contain energy after disconnecting power source for 10 minutes. Only service the unit after the
bus voltage is within safe range.

3
INTRODUCTION
Interest in renewable energy has increased over the past few years due to solar power becoming more cost
effective and eco-friendly. This is a solar inverter which allows power to be switched from the DC power
obtained from solar panels to the AC power needed to control the pump. With the renewable solar inverter,
pumps can adapt to solar power sources rather than traditional electrical supplies or generators.
This solar inverter is built-in with MPPT solar charger to maximize solar power. Besides, it is easy to install with
low maintenance cost. It becomes an eco-friendly solution for the rural areas where grid power is expensive
and unreliable.
Besides, this inverter also accepts single-phase AC input. It allows the inverter to automatically switch between
PV power and AC utility to guarantee water pump operation during night time.
Features
Built-in MPPT solar charger
Supports single-phase asynchronous motor or three-phase asynchronous motor
Built-in full protection and self-diagnosis
Soft start function prevents water hammer effect and extends system lifecycle
Comprehensive LCD and LEDs display real-time system status
Remote monitoring through RS-485
Supports single-phase AC input. When PV energy is not sufficient, the inverter will automatically switch
to AC input.
Optional remote panel is available.
Basic System Architecture
This solar inverter is specially designed to power water pump. The following illustration shows basic application
for this inverter. It also includes PV modules and remote float switches to have a complete running system.

4
Product Overview
1. PV input
2. Single-phase AC input
3. AC output
4. RS-485 communication port
5. RS-232 communication port
6. Signal control slot
7. Display screen (Refer to Operation and Display Panel for the details)
8. LED indicators (Refer to Operation and Display Panel for the details)
9. Operation buttons (Refer to Operation and Display Panel for the details)

5
INSTALLATION
Unpacking and Inspection
Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should
have received the following items inside of package:
The unit x 1
User manual x 1
RJ45 cable x 1
RS-232 cable x 1
Preparation
Before connecting all wirings, please take off bottom cover by removing two screws as shown below.
Mounting the Unit
Consider the following points before selecting where to install:
Do not mount the inverter on flammable construction
materials.
Mount on a solid metal surface.
Avoid direct sunlight. Be sure the environment is shady and
cool.
Be sure to install the inverter into a box with waterproof and
dustproof.
Install this inverter at eye level in order to allow the LCD
display to be read at all times.
The recommended installation position is to be adhered to
the wall vertically.
Be sure to keep other objects and surfaces as shown in the
diagram to guarantee sufficient heat dissipation and to
have enough space for removing wires.
SUITABLE FOR MOUNTING ON CONCRETE OR
OTHER NON-COMBUSTIBLE SURFACE ONLY.

6
1. Drill four holes in the marked locations with four
screws.
2. Install the unit by screwing four screws. It’s
recommended to use M5 screws.
PV Connection
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter
and PV modules. The recommended spec of DC breaker is C16A/2P/750VDC/20KA for 2.2KW LS.
NOTE: It’s required to install PV combiner box when using several PV modules in parallel and series.
PV Module Selection:
When selecting proper PV modules, please be sure to consider below parameters:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. DC voltage (450VDC).
2. Accumulated voltage of connected PV panels should be close to 330V for inverter with 220V output voltage.
To calculate PV module numbers in series (N) and in parallel (M), please follow below formula:
For three-phase output:
Imp>Po/(Kvo x 0.9 x M)
For single-phase output, please use 2 times of PV power rating.
Imp>2 x Po/(Kvo x 0.9 x M)
Po represents the rated output power.
Kvo is equal to 330V/345V/360V for 220V/230V/240V output voltage respectively.
Maximum PV module numbers in series (N) > 330 / Vmp
We strongly recommend the total PV Vmp is around 330Vdc to get the optimum MPPT output.
CAUTION: Important
Before making PV connection, be sure to do the following actions to prevent human injury or machine damage.
1. It’s required to turn off circuit breaker.
2. Make sure connect positive pole (+) of PV input connector in inverter to positive pole (+) of PV modules and
negative pole (-) of PV input connector in inverter to negative pole (-) of PV modules.

7
Below are popular solar panel specifications in the market:
A. 75-A: 75W, Vmp=17.46V, Imp=4.3A, Voc=21.96V
B. 75-B: 75W, Vmp=13.3V, Imp=5.64A, Voc=16.94V
C. 140-A: 140W, Vmp=17.9V, Imp=7.82A, Voc=22.0V
D. 250-A: 250W, Vmp=30.64, Imp=8.16A, Voc=37.38V
Output type
PV Panel 75-A
PV Panel 75-B
PV Panel 140-A
PV Panel 250-A
Three-phase
output
19 pieces in Series
x 2 Strings
(2850W PV Panels)
25 pieces in Series
x 2 Strings
(3750W PV Panels)
19 pieces in Series
(2660W PV Panels)
11 pieces in Series
(2750W PV Panels)
Single-phase
output
19 pieces in Series
x 4 Strings
(5700W PV Panels)
25 pieces in Series
x 3 Strings
(5625W PV Panels)
19 pieces in Series
x 2 Strings
(5320W PV Panels)
11 pieces in Series
x 2 Strings
(5500W PV Panels)
Please follow below steps to implement PV module connection:
1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Check correct polarity of connection cable from PV modules and PV input
connectors. Then, connect positive pole (+) of connection cable to positive
pole (+) of PV input connector. Connect negative pole (-) of connection
cable to negative pole (-) of PV input connector.
3. Make sure the wires are securely connected.
AC Input Connection
CAUTION: Before connecting to AC power source, please install a separate AC circuit breaker between
inverter and AC utility. It’s recommended to use 25A/2P/230V/4500A circuit breaker.
Recommended terminal types:
CAUTION: Important
Before making AC input connection, be sure to do the following actions to prevent human injury or machine
damage.
1. It’s required to turn off circuit breaker.
2. Make sure to connect single-phase AC input to the L & N input connectors in inverter.

8
Suggested cable requirement:
Model
Typical
Amperage
Wire size
Terminal
Torque Value
Dimensions
d (mm)
D (mm)
2.2KW LS
22A
11 AWG
4.5
9.5
1.3 ~ 1.4 Nm
Please follow below steps to implement AC input connection:
1. Before making AC input connection, be sure to disconnect all circuit breakers or disconnectors first.
2. Remove insulation sleeve 10mm for two conductors. And shorten phase L and neutral conductor N 3 mm.
3. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws.
L→LINE (brown or black)
N→Neutral (blue)
4. Make sure the wires are securely connected.
AC Output (Motor) Connection
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC output
connection. To reduce risk of injury, please use the proper recommended terminal and cable size as below.
Recommended terminal types:
Suggested cable requirement:
Model
Typical
Amperage
Wire size
Terminal
Torque Value
Dimensions
d (mm)
D (mm)
2.2KW LS
15A
13 AWG
4.5
9.5
1.3 ~ 1.4 Nm
Please follow below steps to implement AC output connection:
1. Remove insulation sleeve 10mm for two conductors if applying single-phase output or three conductors if
applying three-phase output. And shorten these conductor 3 mm.
2. Please follow below steps to complete output wire connection.