User Manual

4KVA-5KVA 1.0PF
INVERTER / CHARGER
Table Of Contents
ABOUT THIS MANUAL.................................................................................................... 1
Purpose ...................................................................................................................... 1
Scope .......................................................................................................................... 1
SAFETY INSTRUCTIONS .................................................................................................. 1
INTRODUCTION.............................................................................................................. 2
Features...................................................................................................................... 2
Basic System Architecture.......................................................................................... 2
Product Overview....................................................................................................... 3
INSTALLATION ................................................................................................................ 4
Unpacking and Inspection .......................................................................................... 4
Mounting the Unit ..................................................................................................... 4
Battery Connection .................................................................................................... 5
AC input/output Connection...................................................................................... 6
PV Connection ............................................................................................................ 8
OPERATION .................................................................................................................. 10
Power ON/OFF ......................................................................................................... 10
Operation and Display Panel.................................................................................... 10
LCD Display Icons ..................................................................................................... 11
LCD Setting ............................................................................................................... 14
Display Setting.......................................................................................................... 17
Operating Mode Description ................................................................................... 19
Alarm Behavior Table ............................................................................................... 20
SPECIFICATIONS ........................................................................................................... 22
Table 1 Line Mode Specifications ............................................................................ 22
Table 2 Inverter Mode Specifications ...................................................................... 23
Table 3 Charge Mode Specifications ........................................................................ 24
Table 4 General Specifications ................................................................................. 24
Troubleshooting........................................................................................................... 25
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.

1. Before using the unit, read all instructions and cautionary markings on the unit, the batteries and all
appropriate sections of this manual.
2. CAUTION—To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries.
3. Do not try to repair or open the unit. Take it to a qualified service center when needed. Incorrect
installation may result in a risk of electric shock or fire.
4. Disconnect all wirings before attempting any maintenance or cleaning.
5. CAUTION - Only qualified personnel can install and troubleshoot this inverter.
6. NEVER charge a frozen battery.
7. For optimum operation of this hybrid inverter, please follow required spec to select appropriate
cable size. It’s very important to correctly operate this hybrid inverter.
8. Be very cautious when working with metal wrist watch and tools on or around batteries. A potential
risk exists for short circuit batteries terminals with explosion.
9. Please strictly follow installation procedure when you want to disconnect AC or DC connectors.
10. This hybrid inverter should be connected to a permanent grounded wiring system.

1
INTRODUCTION
This is a pure sine wave stand-alone hybrid inverter system combining the function of inverter, AC
charger and optional solar charger, and provides a long run-time uninterruptible power supply. Its
comprehensive LCD display provides system status, and user-friendly panel eases parameters
settings.

Features
• High-frequency switching technology, compact size and light weight
• Pure sine wave output for wide range of applications
• Build-in solar charger controller with MPPT technology to optimize the power utilization
• Efficient DC-to-AC conversion minimizing energy loss
• Standby Charging Mode enables battery charging even when the unit is switched off
• Intelligent cooling fan control
• Input/output isolated design for the maximum operation safety
• LCD displays for detailed status
• Configurable AC input voltage range and priority for AC or PV input
• Supports Home Appliances / Office Equipment/ Lighting Equipment/ Motor-based Equipment
(such as Fan, Air-Conditioner, Washing Machines etc)
• Input low voltage / Overload / Short circuit / Low battery alarm / Input over voltage / Over
temperature protections.
• Supports both rack and wall-mount installation

Basic System Architecture

The following illustration shows basic application for this hybrid inverter. It also includes following
devices to have a complete running system:
Ÿ Generator or Utility.
Ÿ PV modules
Consult with your system integrator for other possible system architectures depending on your
requirements.
This inverter can power all kinds of appliances in home or office environment, including motor-type
appliances such as tube light, fan, refrigerator and air conditioner.

Figure 1 Hybrid Power System

2
Product Overview

1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons
6. Power on/off switch
7. AC input
8. AC output
9. PV input
10. Battery input
11. AC Breaker
12. RS232 communication port
13. Maintenance switch
14. Dry contact
15. Ground screw

3
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 the box:
Ÿ The unit x 1
Ÿ User manual x 1
Ÿ DC Fuse x 1
Ÿ Ring terminal x 1
Ÿ Terminal cover x 1
Ÿ Screws x 4

Mounting the Unit

Consider the following points before selecting where to install:
Ÿ Do not mount the inverter on flammable construction materials.
Ÿ Mount on a solid surface
Ÿ Install this inverter at eye level in order to allow the LCD display to be read at all times.
Ÿ For proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to the side and
approx. 50 cm above and below the unit.
Ÿ The ambient temperature should be between 0°C and 45°C to ensure optimal operation,
Ÿ The recommended installation position is to be adhered to the wall vertically.
Ÿ 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.

Install the unit by screwing four screws. It’s recommended to use M5 screws.

4
Battery Connection
CAUTION: For safety operation and regulation compliance; it’s requested to install a separate DC
over-current protector or disconnect device between battery and inverter. It may not be requested to
have a disconnect device in some applications, however, it's still requested to have over-current
protection installed. Please refer to typical amperage in below table as required fuse or breaker size.
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
battery connection. To reduce risk of injury, please use recommended cable as below.
Recommended battery cable size:
Model Wire Size DC Cable (mm2)
4KVA-48V 1 x 4AWG 25
5KVA-48V 1 x 4AWG 25

5
Please follow below steps to implement battery connection:
1. Take out battery cable from inverter package.

2. Connect all battery packs as below chart.

3. Insert the battery wires terminal into battery connectors of inverter Make sure polarity at both the
battery and the inverter/charge is correctly connected.

4.

WARNING: Shock Hazard

Installation must be performed with care due to high battery voltage in series.

CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be

sure positive (+) must be connected to positive (+) and negative (-) must be connected to
negative (-) terminal.

AC input/output Connection
CAUTION!! Before connecting to AC input power source, please install a separate AC breaker between
inverter and AC input power source. This will ensure the inverter can be securely disconnected during
maintenance and fully protected from over current of AC input. The recommended spec of AC breaker is
40A for 5KVA.
CAUTION!!Terminal blocks are with “AC INPUT” and ''AC OUTPUT” marking always check labels to avoid
wrong 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
input connection. Always use recommended AC cable size as below.
Suggested cable requirement for AC wires
Model Wire Size Cable (mm2) Torque value
4KVA 10AWG 6 1.6 Nm
5KVA 10AWG 6 1.6 Nm

6
Please follow below steps to implement AC input/output connection:
1. Before making AC input/output connection, be sure to open AC protector or disconnector first.
2. Remove insulation sleeve 8mm for six conductors. And shorten phase L and neutral conductor
N 3 mm.
3. Fix strain relief plate
4. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal
screws. Be sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)

WARNING:
Be sure that AC power source is disconnected before attempting to hardwire it to the unit

5. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal

screws. Be sure to connect AC output ground ( ) first.

→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)

7
6. Make sure the wires are securely connected and the cover is fixed by screw.

PV Connection
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between
inverter and PV modules.
WARNING! It’s very important for system safety and efficient operation to use appropriate cable for PV
module connection. To reduce risk of injury, please use the proper recommended cable size as below.
Model Wire Size Cable (mm2) Torque value ( max)
4KVA 1X10AWG 6 1.6 Nm
5KVA 1X10AWG 6 1.6 Nm

PV Module Selection: (Only for the model with MPPT solar charger)
When selecting proper PV modules, please be sure to consider below parameters:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than min, battery voltage.

INVERTER MODEL 5KVA

Max. PV Array Open Circuit Voltage 150Vdc
PV Array MPPT Voltage Range 60~150Vdc

Take 250Wp PV module as an example. After considering above two parameters, the recommended
module configurations for5KVA are listed as below table.
Maximum Power (Pmax) 250W
5KVA:
Max. Power Voltage Vmpp(V) 30.1V
2 pieces in serial and 8 sets in parallel, or
Max. Power Current Impp(A) 8.3A
4 pieces in serial and 4 sets in parallel
Open Circuit Voltage Voc(V) 37.7V
Short Circuit Current Isc(A) 8.4A

PV Module Wire Connection

Please follow below steps to implement PV module connection:
1. Wire connection of the connector:

8
 1．Inserting the stripped conductor.
Cross-sections:2.5 to 62 mm. Outside diameter:
5.0 to 8.0 mm. Stripping length: 15 mm.
2．Close spring with the thumb or using
combination pliers. Please ensure that the
spring is closed.
3. Push connectors together.
4. Screw cable gland tight. Screw in the nut
until it reaches the O-ring and then tighten it
with at least 2 Nm using a suitable tool.
Finished!
2. Check correct polarity of wire connection from PV modules and PV input connectors. Then, connect
positive pole (+) of connection wire to positive pole (+) of PV input connector. Connect negative pole
(-) of connection wire to negative pole (-) of PV input connector.

3. If you need disconnect the PV connector, follow below steps and refer to the below Fig.

1. Insert screwdriver SZF1 or phase tester in one

of the illustrated positions.
2. Leave screwdriver inserted and remove
connector from socket.

Final Assembly
After connecting all wirings, before turning on the unit, please check the position of maintenance switch.
Put the switch to “NORMAL” position if not. Other position of the switch like “INV” or “SCC” is used for
only service purpose.

9
OPERATION
Power ON/OFF

Once the unit has been properly installed and the batteries are connected well, simply press On/Off
switch to turn on the unit.

Operation and Display Panel

The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes
three indicators, four function keys and a LCD display, indicating the operating status and input/output
power information.

10
LED Indicator
LED Indicator Messages
Solid On Output is powered by utility in line mode.
Green
Flashing Output is powered by battery or PV in battery mode.
Solid On Battery is fully charged.
Green
Flashing Battery is charging.
Solid On Fault occurs in the inverter.
Red
Flashing Warning condition occurs in the inverter.

Button function
Button Function Description
Enter configuration mode, and switch between setting menus
Configuration

Up/down Move to previous/next setting option

ESC Return to main menu

Enter Confirm setting

LCD Display Icons

Icon Function description

Input Source Information
Indicates the AC input.
Indicates the PV input

Indicate input voltage, input frequency, PV voltage, charger current (if PV in

charging for 5K models), charger power (only for MPPT models), battery
voltage.
Configuration Program and Fault Information
Indicates the setting programs.

11
 Indicates the warning and fault codes.

Output Information
Indicate output voltage, output frequency, load percent, load in VA, load in Watt and
discharging current.

Battery Information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery mode and
charging status in line mode.

In AC mode, it will present battery charging status.

Status Battery voltage LCD Display
<2V/cell 4 Bars will flash in turns.
Bottom bar will be on and the other three bars
2 ~ 2.083V/cell
Constant Current will flash in turns.
mode / Constant Bottom two bars will be on and the other two
2,083 ~ 2.167V/cell
Voltage mode bars will flash in turns.
Bottom three bars will be on and the top bar will
>2.167V/cell
flash.
Floating mode. Batteries are fully charged. 4 bars will be on.
In battery mode, it will present battery capacity.
Load Percentage Battery Voltage LCD Display

< 1.85V/cell

1.85V/CCII ~ 1.933V/cell
Load >50%
1.933V/cell ~ 2.017V/cell

> 2.017V/cell

< 1.892V/cell

Load < 50% 1.892V/cell ~ 1.975V/cell

1.975V/cell ~ 2.058V/cell

12
 >2.058V/cell

Load Information
Indicates overload.

Indicates the load level by 0-24%, 25-50%, 50-74% and 75-100%.

0%~25% 25%~50% 50%~75% 75%~100%

Mode Operation Information

Indicates unit connects to the mains.

Indicates unit connects to the PV panel.

Indicates load is supplied by utility power.

Indicates load is supplied by battery power or PV power.

Indicates the utility charger circuit is working.

Indicates the DC/AC inverter circuit is working.

Mute Operation

Indicates unit alarm is disabled.

13
LCD Setting
After pressing and holding “Configuration” button for 1 second, the unit will enter setting mode and
switch between different setting items. Press “Up/down” button to switch between different setting
parameters. And then, press “ENTER” button to confirm the selection or ESC button to exit.

Setting Programs:
Program Description Selectable option
Solar energy provides power to the loads
as first priority.
If solar energy is not sufficient to power all
Solar first connected loads, battery energy will supply
power the loads at the same time.
Utility provides power to the loads only
when any one condition happens:
-Solar energy is not available -Battery
voltage drops to low-level warning voltage
or the setting point in program 05.
Output source
Utility will provide power to the loads as
priority: To Utility first (default)
first priority.
01 configure load
Solar and battery energy will provide
power source
power to the loads only when utility power
priority
is not available.
Solar energy provides power to the loads
as first priority.
If solar energy is not sufficient to power all
SBU priority
connected loads, battery energy will supply
power to the loads at the same time.
Utility provides power to the loads only
when battery voltage drops to either
low-level warning voltage or the setting
point In program 05.
Appliances (default)

If selected, acceptable AC input voltage

AC input voltage range will be within 125-280VAC
02
range UPS If selected, acceptable AC input voltage
range will be within175-280VAC

AGM (default) Flooded

03 Battery type
User-Defined If "User-Defined" is selected, battery
charge voltage and low DC cut-off voltage
can be set up in program9,10 and 11.

14
 Available options in 5KVA model:
Maximum utility 15A(default) 35A
04 charging current

Available options in 5KVA model:

44.2V 45.0V

Setting voltage 46.0V 46.8V

point back to utility
source when
05 selecting ''SBU
priority" or ''Solar 47.6V 48.6V
first" in program
01.

49.4V 50.3V

Battery fully charged 49.2V

50.0V 50.8V

51.6V 52.6V
Setting voltage
point back to
battery mode
06 when selecting
53.5V 54.4V
“SBU priority” or
"Solar first" in
program 01.

55.2V 56.0V

57.0V 57.8V

15
 If this inverter/charger is working in Line, Standby or Fault mode,
charger source can be programmed as below:
Solar first Solar energy will charge battery as first
priority.
Utility will charge battery only when
solar energy is not available.
Utility first Utility will charge battery as first priority.
Solar energy will charge battery only
when utility power is not available.
Charger source
priority: To Solar and Utility Solar energy and utility will charge
07
configure charger (default) battery at the same time.
source priority

Only Solar Solar energy will be the only charger

source no matter utility is available or
not.

If this inverter/charger is working in Battery mode only solar energy

can charge battery. Solar energy will charge battery if it’s available
and sufficient.
Alarm on (default) Alarm off
08 Alarm control

5KVA setting:

Bulk charging
09 voltage (C.V
voltage) If self-defined is selected in program 3, this program can be set up.
Setting range is from 50.0V to 59.0V for 5KVA model. Increment of
each dick is about 0.2V.
4KV/5KVA setting: 55.0V

Floating charging
10
voltage
If self-defined is selected in program 3, this program can be set up.
Setting range is from 50.0V to 59.0V for 4KVA/5KVA. Increment of
each dick is about 0.2V.
4KVA/5KVA default setting: 40.0V

Low DC cut-off
11 If self-defined is selected in program 3, this program can be set up.
voltage
Setting range is from 40.0V to 48.0V for 4KVA/5KVA model.
Increment of each dick is about 0.2V. Low DC cut-off voltage will be
fixed to setting value no matter what percentage of load is
connected. 16
 50Hz(default) 60Hz
12 Output frequency

Maximum charging 45A (default) Setting range is from 15A to

current: 115A.
To configure total Increment of each click is 10A.
charging current for
solar and utility
13
chargers.(Max.
charging current =
utility charging
current + solar
charging current
Output mode when
in stand- by
mode(Switch off)
14 When set on , the inverter will has AC output in stand-by
mode(switch off) if utility is available.
When set off , the inverter will has no output in stand-by
mode(switch off) even if utility is available.

Display Setting
The LCD display information will be switched in turns by pressing “Up/down” key. The selectable
numerical information is as: input voltage, input frequency, PV voltage, PV charging power, battery
voltage, output voltage, output frequency, load in Watt, load in VA, rated Watt, rated VA, main CPU
Version and second CPU Version.
LCD Display Remark
Note：The LCD display information will be switched in turns by
pressing “UP” or “DOWN” button. The default page is ①，the
display will show default page after pressing “ESC” button.

①. AC input voltage /
frequency & AC output
voltage /frequency

②. Battery voltage &

AC output voltage /
frequency

17
 ③. Battery voltage &
Load VA /WATT

④.PV voltage / PV
charge power& AC
output voltage /
frequency

⑤.Rating power KVA /

KW & Firmware version
U1/U2

18
Operating Mode Description
Operation mode Description LCD display
Charging by utility and PV energy.

Charging by utility.
Standby mode
Note:
*Standby mode: The
No output is supplied
Inverter is not turned on yet
by the unit but it still
but at this time, the inverter
can charge batteries.
can charge battery without
AC output
Charging by PV energy.

No charging.

Charging by utility and PV

Energy

Fault mode
Note: Charging by utility
*Fault mode: Errors are
PV energy and utility
caused by inside circuit error
can charge batteries.
or external reasons such as
over temperature, output
short circuited and so on.

Charging by PV energy

No charging

19
 Charging by utility and PV energy.

The unit will provide

output power from the
Line Mode mains. It will also
Charging by utility.
charge the battery at
line mode.

Power from battery and PV energy.

The unit will provide

Battery Mode output power from Power from battery only.
battery and PV power.

Alarm Behavior Table

Fault Protect Active Warning Fault Restart
Condition
Code Function Mode (O/P=ON) (O/P=OFF) Operate Condition
Low DC
Inv. DC voltage<Low DC
-- Voltage 1beep/2s -- -- --
mode Alarm
Alarm
Over DC Voltage>High Beep
Line
1 Charge DC input continuous -- Manual --
mode
Protection Shut-down
DC
Voltage<Hi
Over DC Voltage>High
Beep gh
1 Voltage Standby DC input -- Auto
continuously DC input
Protection Shut-down
Shut-down
Recovery
1beep/0.5s
Line/
Over Load , and Beep
2 Inv. 110%~150% load Manual --
Protection continue continuously
mode
for10s

20
 1beep/0.5s
, and
Beep
>150% load continue Manual --
continuously
for
5s
Output
Short Inv. Output Beep
3 -- Manual --
Circuit mode Voltage<20Vrms continuously
protection
Inverter 2beep/2s,
Line/
Fan Fan Locked and Beep
4 Inv. Manual --
Fault Fan Defected continue continuously
mode
Protection for 1min
Inverter HEAT
Line/
Over Temp HEAT SINK over Beep SINK
5 Inv. -- Auto
Protection temp continuously Temp≤
mode
55℃
(Output Voltage
<170Vrms and
Output Inv. output current Beep
6 -- Manual --
Abnormal mode under continuously
32Arms) or Output
Voltage >280Vrms
Standby Bus voltage over/
/ AC Input and
Bus Over Beep
7 Line/ output reconnect -- Manual --
Protection continuously
Inv.
mode
SCC
charger SCC charger current Beep
11 Current SCC over -- 1time/2Seco Manual --
Over 80A nd
FAULT
SCC NTC Beep
SCC over
12 SCC Temperature over -- 1time/2Seco Manual --
temp.
85℃ nd
SCC SCC Output
SCC Output voltage Beep
Output Manual/ voltage low
13 SCC over -- 1time/2Seco then 54V
voltage Auto
60V nd
Over
PV Input
SCC PV PV Input voltage Beep
Manual/ voltage low
14 voltage SCC over -- 1time/2Seco
Auto then 130V
Over 150V nd

Note: when SCC Fault, press ENTER Key will clear this fault message.
21
1) Unit will shut down after alarm for 1min, when unit on both fault mode and Switch-off mode.
2) Unit will shut down immediately without any alarm, when unit on Switch-on mode with low DC
input.

SPECIFICATIONS
MODEL 4KVA-48 5KVA-48
CAPACITY 4KVA/4KW 5KVA/5KW

Table 1 Line Mode Specifications

INPUT 4KVA-48 5KVA-48
Input Voltage Waveform Sinusoidal (utility or generator)
Nominal Input Voltage 230Vac
175Vac±7V(UPS)
Low Loss Voltage
125Vac±7V (Appliances)
185Vac±7V (UPS)
Low Loss Return Voltage
135Vac±7V (Appliances)
High Loss Voltage 280Vac±7V
High Loss Return Voltage 270Vac±7V
Max AC Input Voltage 300Vac
Nominal Input Frequency 50Hz / 60Hz (Auto detection)
Low Loss Frequency 40±1Hz
Low Loss Return Frequency 42±1Hz
High Loss Frequency 65±1Hz
High Loss Return Frequency 63±1Hz
OUTPUT 4KVA-48 5KVA-48
Output Short Circuit Protection Circuit breaker
Efficiency (Line Mode) >95% ( Rated R load, battery full charged )
10ms typical (UPS)
Transfer Time
20ms typical (Appliances)
Output power derating:
When AC input voltage drops to
180V, the output power will be
derated.

22
Table 2 Inverter Mode Specifications
INVERTER MODEL 4KVA-48 5KVA-48
Rated Output Power 4KW/4KVA 5KW/5KVA
OUTPUT
Output Voltage Waveform Pure Sine Wave
Output Voltage Regulation 230Vac±5%
Output Frequency 50Hz
Peak Efficiency 93%
Overload Protection 5s@>150%load; 10s@110%~150% load
Surge Capacity 2* rated power for 5 seconds
Nominal DC Input Voltage 48Vdc
INPUT
Cold Start Voltage 46.0Vdc
Low DC Warning Voltage
46.0Vdc
@ load < 50%
44.0Vdc
@ load > 50%
Low DC Warning Return Voltage
47.0Vdc
@ load < 50%
46.0Vdc
@ load > 50%
Low DC Cut-off Voltage
42.0Vdc
@ load < 50%
40.0Vdc
@ load > 50%
High DC Recovery Voltage 54Vdc
High DC Cut-off Voltage 60Vdc

23
Table 3 Charge Mode Specifications
Utility Charging Mode
INVERTER MODEL 4KVA-48 5KVA-48
Charging Algorithm 3-Step
AC Charging Current (Max) 15A/35Amp (@Vi/p=230Vac)
Flooded Battery 58.4Vdc
Bulk Charging
AGM / Gel 56.4Vdc
Voltage
Battery
Floating Charging Voltage 54.8Vdc

Charging Curve

MPPT Solar Charging Mode

INVERTER MODEL 4KVA-48 5KVA-48
Charging Current 60Amp 80Amp
PV Array MPPT Voltage Range 60 to 150Vdc
Max. PV Array Open Circuit
150Vdc
Voltage
Max Charging Current
95 Amp 115 Amp
(AC charger plus solar charger)

Table 4 General Specifications

INVERTER MODEL 4KVA-48 5KVA-48
Safety Certification CE
Operating Temperature Range -10°C to 50°C
Storage temperature -15°C to 60°C
Dimension (D*W*H) ,mm 486*330*130
Net Weight ,kg 11.4 12.4

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Troubleshooting
Problem Possible Causes Remedy
1. Battery weak 1. Re-charge battery
2. Battery defective (can't be charged) 2. Battery replacement
No LCD
display 3. Power switch is not pressed 3. Press and hold power switch
4. Battery polarity reversed, can’t start up
4. Contact dealer or supplier for service
the unit
Mains 1. AC Input is missing 1. Check AC input connection
normal but
works in
2. Input fuse broke 2. Replace the input fuse
inverter
mode
PV input 1.PV weak 1.Check PV power or reduce loading
normal but 2.PV input is missing 2.Check PV input connection
works in
inverter
mode
1. Reduce loading so the loads’ capacity
1. Overload (fault code: F2)
is no larger than the upper limit
2. Output short-circuited (fault code: F3) 2. Check wiring or remove abnormal
load
3. Check the ventilation at installed
3. Inverter over-temperature (fault code:
location and make sure the air vent of
F5)
inverter is clear
4. Restart the unit, If the fault persists,
4. Over charging (fault code: F1)
contact dealer or supplier for service.
5. Check if the fan is blocked by obstacle.
5. Fan error (fault code: F4) if not, contact dealer or supplier for
Alarm service
buzzer
6. DC voltage is under low DC shut-down
beeps 6. Make sure mains is normal to
point (fault code:
continuously recharger the battery
F0)
7. Output abnormal (fault code:
7. Contact dealer or supplier for service
F6)
8. Back-EMF (fault code: F7) 8. Check the AC Input and output wire
connection
9.SCC output over current (fault code: F11) 9.Check wiring or remove abnormal load
10. Check the ventilation at installed
10.SCC over temp(fault code: F12) location and make sure the air vent of
inverter is clear
11.SCC Output over voltage(fault code: 11. Restart the unit. If the fault persists,
F13) contact dealer or supplier for service

25
 12.Check PV input voltage. If the voltage
12.SCC PV input over voltage (fault code:
is normal, contact dealer or supplier
F14)
for service
Back up 1. Overload 1. Reduce the loading
time is 2. Battery voltage is too low 2. Charge battery for 8 hours or more
shortened 3. Battery bank is too small 3. Increase battery bank capacity
Note: If the unit fails to operate properly after installation and the setup has been re-examined
thoroughly, use the troubleshooting table to determine the probable cause and remedy. For unlisted
faults, please contact your local dealer or supplier for service assistances.

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