CanadianSolar CSI-3K-S22002-E User manual

CSI-3K-S22002-E
CSI-3.68K-S22002-E
CSI-5K-S22002-E
PV Inverter User Manual
(Part No: 2809002601; Release Date: October, 2021)

Contents
1 Introduction ............................................................................................................................................1
1.1 General Information............................................................................................................................... 1
1.2 User Manual Disclaimer ......................................................................................................................... 1
1.3 Limitation of Liability .............................................................................................................................. 1
1.4 Target Group ........................................................................................................................................... 1
1.5 Symbol Conventions............................................................................................................................... 1
1.5.1 Warnings in the manual .................................................................................................................. 1
1.5.2 Labels on product and packaging .................................................................................................. 2
2 Safety Instruction...................................................................................................................................2
2.1 General Safety ......................................................................................................................................... 2
2.2 Notice for Use.......................................................................................................................................... 2
2.2.1 Personnel requirements.................................................................................................................. 2
2.2.2 Operation requirements.................................................................................................................. 2
2.2.3 Protecting labels............................................................................................................................... 2
3 Product Overview ...................................................................................................................................3
3.1 Product Introduction .............................................................................................................................. 3
3.2 Appearance.............................................................................................................................................. 3
3.3 Product Nameplate................................................................................................................................. 4
4 Storage.....................................................................................................................................................4
5 Unpackaging and Inspection ................................................................................................................5
6 Installation ..............................................................................................................................................5
6.1 Basic Installation Requirements............................................................................................................ 5
6.2 Mounting Wall-mounting Bracket ......................................................................................................... 7
6.3 Installing Inverter ................................................................................................................................... 7
7 Electrical Connection..............................................................................................................................8
7.1 Safety ....................................................................................................................................................... 8
7.2 Recommended Cables............................................................................................................................ 8
7.3 Meter/CT Connection (Optional)............................................................................................................ 8
7.4 Wiring PE Cable ....................................................................................................................................... 8
7.5 Wiring AC Output.................................................................................................................................... 9
7.6 Wiring DC Input..................................................................................................................................... 11
7.6.1 Requirement for DC input ............................................................................................................. 11
7.6.2 Wiring .............................................................................................................................................. 11
7.6.3 Connecting PV array (DC input) .................................................................................................... 12
8 Communication.....................................................................................................................................13
8.1 Communication Mode.......................................................................................................................... 13
8.2 External WiFi.......................................................................................................................................... 13
8.2 RS485 ..................................................................................................................................................... 13
8.3 Communication Scheme.………………………………………………………………………………………………………..….13

9 Commissioning Inverter ......................................................................................................................14
9.1 Checking Electrical ................................................................................................................................ 14
9.2 Checking Mechanical............................................................................................................................ 14
9.3 Start-UP Inverter................................................................................................................................... 14
9.4 LED Indicators ....................................................................................................................................... 14
9.5 Switch off ............................................................................................................................................... 14
10 Daily Maintenance..............................................................................................................................15
11 Trouble Shooting.................................................................................................................................15
11.1 Warning ............................................................................................................................................... 15
11.2 Errors ................................................................................................................................................... 15
12 Handling the Inverter ........................................................................................................................17
12.1 Removing Inverter.............................................................................................................................. 17
12.2 Packing Inverter.................................................................................................................................. 17
12.3 Disposing Inverter .............................................................................................................................. 17
ANNEX A: Acronyms and Abbreviations................................................................................................18
ANNEX B: Specification ...........................................................................................................................19
ANNEX C: CE &RoHS Declaration
ANNEX D: REACH Declaration

1 Introduction
1 / 19
1 Introduction
1.1 General Information
This manual provides important safety information on relating to the installation, maintenance and usage of single
phase PV inverters. Both users and professional installers must read these guidelines carefully and strictly follow these
instructions. Failure to follow these instructions may result in death, serious injury or property damage.
Only qualified professionals and service personnel can do the installation and operation (refer to 62109-1). Installers
must inform end-users (consumers) about the aforesaid information accordingly.
This manual is only valid for the PV inverter types, CSI-3K-S22002-E, CSI-3.68K-S22002-E, and CSI-5K-S22002-E
produced by CSI Solar Co., Ltd.
1.2 User Manual Disclaimer
The information contained in this manual is subject to change by CSI Solar Co., Ltd. without prior notice. CSI Solar Co.,
Ltd. gives no warranty of any kind whatsoever, either explicitly or implicitly, with respect to the information contained
herein.
In the event of any inconsistency among different language versions of this document, the English version shall
prevail. Please refer to our product lists and documents published on our website at: http://www.csisolar.com as these
lists are updated on a regular basis.
1.3 Limitation of Liability
CSI Solar Co., Ltd. shall not be held responsible for damages of any kind, including-without limitation-bodily harm,
injury or damage to property, in connection with handling PV inverters, system installation, or compliance or
non-compliance with the instructions set forth in this manual.
1.4 Target Group
This document is intended for installers and users.
1.5 Symbol Conventions
The symbols that may be found in this document or on the product packaging are defined as follows.
1.5.1 Warnings in the manual
A warning describes a hazard to equipment or personnel. It calls attention to procedure or practice.
Symbol Description
DANGER
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death
or serious injury.
WARNING
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death
or serious injury.
CAUTION
CAUTION indicates a potentially hazardous situation which, if not avoided, could result in minor
or moderate injury.
NOTICE
NOTICE indicates a situation which, if not avoided, could result in equipment or property
damage.
Information
Information indicates that you must read carefully to ensure optimal operation of the system.

2 Safety Instruction
2 / 19
1.5.2 Labels on product and packaging
Symbol Description
Hot surfaces！
Risk of burns due to hot components!
Danger to life due to high voltage!
Time need to discharge stored energy in the capacitors.
Grounding
Direct Current (ＤＣ)
Alternating Current(ＡＣ)
Check the user manual before service.
CE mark.
WEEE designation.
2 Safety Instruction
2.1 General Safety
The Inverter has been designed and tested strictly according to the international safety codes, however, certain safety
precautions must be observed when installing and operating this inverter. Read and follow all the instructions,
cautions and warnings in this user manual carefully before any work and keep this manual for future reference.
2.2 Notice for Use
2.2.1 Personnel requirements
Only qualified personnel are allowed to install and commission the inverter, they should:
1) Receive professional training and get the authorization.
2) Be familiar with the safety specification about the electrical system.
3) Be familiar with the local requirements, rules and regulations.
4) Understand the composition and working principles of the grid-tied PV system.
2.2.2 Operation requirements
Use the inverter in installations that meet the following specifications only.
1) Permanent installation is required.
2) The electrical installation must meet all the applications and standards.
3) The inverter must be installed according to the instructions stated in this manual.
4) The inverter must be installed according to the correct technical specifications.
5) To startup the inverter, the Grid Main Switch (AC) must be switched on, before the solar panel’s DC solar switched
on. To stop the inverter, the Grid Supply Main Switch (AC) must be switched off before the solar panel’s DC isolator
switched off.
2.2.3 Protecting labels
1) Do not scrawl or damage any labels on the inverter enclosure because these labels contain important information
about safe operation.
2) Do not scrawl or damage the nameplate on the inverter enclosure. This nameplate contains important product
information.

3 Product Overview
3 / 19
3 Product Overview
3.1 Product Introduction
The inverters are single-phase grid-connected PV string inverters without transformers, which can convert the DC
power from the photovoltaic (PV) strings into alternating current (AC) power, and feed the power into the power grid.
This document involves the following product models:
CSI-3K-S22002-E, CSI-3.68K-S22002-E, and CSI-5K-S22002-E.
PV grid-connected systems mainly include PV modules, DC switches, inverters, AC switches, electricity meters, and the
local grid. The PV power system diagram is shown as FIG.3-1.
KWH
PV Modules DC Switch Inverter AC Switch Electricity Meter Utility Grid
FIG. 3-1 PV Power System Diagram
3.2 Appearance
Front view and bottom view
A B CDE F GH
ACBF EDGH
C B I F E D G H
CSI-3K-S22002-E CSI-3.68/5K-S22002-E
FIG. 3-2 Front view and bottom view
Object Name Description
ＡLED indicator Indicates inverter operation status.
ＢDC input connectors /
ＣDC disconnect switch (both positive
and negative)
Disconnects the DC current safely. For long term durability do not
use under full load or switch of AC power before.
DCT/Meter jack Connects CT or Meter.
EWaterproof and breathable valve /
FCommunication port Connects wireless datalogger (WiFi), RS485.
GAC receptacle Jack/Receptacle for AC/grid connection
HExternal ground point /
IReserved port

Reserved for other regions, never remove the protection cover.

4 Storage
4 / 19
3.3 Product Nameplate
The nameplate provides a unique identification of the inverter (Product type, device -specific characteristics,
certificates and approvals).
The nameplate is on the left side of the enclosure.
Product Name: Grid-connected PV Inverter
Model Number: CSI-3.68K-S22002-E
Vmax. PV(absolute max.): 600V dc
MPPT Voltage Range: 100~550V dc
Max. Input Current: 12/12 A dc
Max. Short-Circuit Current: 15/15 A dc
Rated Output Power: 3680W
AC Nominal Voltage: 230V ac
AC Nominal Frequency: 50Hz
Max.Output Current: 16A ac
Power Factor:＞0.99(0.8 leading...0.8 lagging)
Overvoltage Class: ll(DC), lll(AC)
Degree of Protection: IP65
OperatingTemperature Range: -25°C...+60°C
5mins

R
Type A pproved
Safety
Regula r Production
Surveillance
ID 2000000000
LED Indicators
Normal
Waiting
Steady Green
Blinking Green
No DC Input
Off
ErrorSteady Red
More details, please refer
to the user manual.
(Scan the QR code)
624300XXXX
FIG.3-3 Inverter Nameplate (for reference)
4 Storage
The following requirements should be met when the inverters need to be stored:
Do not unpack the inverter.
Storage temperature: –40°C ~ +70°C.
Storage humidity: 0% ~ 100%RH (Non-Condensing).
The warehouse should be clean, well-ventilated, and non-corrosive gas (corrosive or flammable gases), meanwhile it
should be accessible all the time.
No smoking, no illegal use of electricity and fire.
When storing inverters, do not stack more than the allowed layers to avoid damage, which number marked on the
product packaging.
Do not tilt the package or place it upside down.
Regular inspection is required during the storage.
If the inverter has been stored more than half a year, it must be checked and tested by professionals before put into
use.

5 Unpackaging and Inspection
5 / 19
5 Unpackaging and Inspection
Before unpacking the inverter, check the package appearance thoroughly, such as for holes and cracks, and check the
inverter model accordingly. If you discover any damage to the packaging which indicates the inverter may have been
damaged, or the inverter model is not the one you requested, do not unpack the product and contact your dealer
immediately.
After opening the package, check all of the accessories carefully in the carton. If any damage is found or any
component is missing, contact your local installer.
Note: For details information about the components, see the packing list document in the packing case.
6 Installation
6.1 Basic Installation Requirements
1) Do not install the inverter on the structures constructed of flammable, thermolabile or explosive materials.
2) The installation surface must be strong enough to bear the inverter's weight for a long period time. (Please check
the inverter’s weight in the product specification of ANNEX B).
3) The inverter is protected to IP65, can be installed indoors and outdoors.
4) The humidity of the installation location should be below 100% without condensation.
5) The ambient temperature should be between -25°C to 60°C.
6) Install at eye-level for easy operation.
7) Do not install the inverter near television antenna or any other antennas and antenna cables.
8) Ensure the inverter is out of children's reach.
9) Install inverter at the locations with some cover or protection, to ensure the optimum operation.
FIG.6-1 Inverter Installation Positions FIG.6-2 Forbid to Install in Small Closed Cabinet
10) Do not install in small closed cabinet where air cannot circulate freely. Do not put any other objects on the inverter,
as per FIG.6-2.
11) Comply with the Min. clearance to walls, other inverters, or objects to ensure the installation and maintenance,
meanwhile for the good heat dissipation.
FIG.6-3 Installation Clearance Requirement
Direction
Min. clearance (cm)
Above
50
Below
50
Sides
30
Front
30

6 Installation
6 / 19
min.30c m
min.50cm
min.50cm
min.30c m min.30c m min.30c m min.30c m
min.30c mmin.30c mmin.30c m min.30c m
min.50cm min.50cm min.50cm
min.50cm min.50cm min.50cm min.50cm
min.50cm min.50cm
FIG.6-4 Staggered Installation Mode (Recommended)
12) Install the inverter vertically or at a maximum backward tilted angle of 15 degrees to facilitate heat dissipation,
and to ensure that no moisture can penetrate the product.
≤15°
FIG.6-5 Installation Angle Requirements
13) Do not install the inverter outdoors in salt, sulfur or other corrosive areas.
The inverter would be corroded in salt (i.e. marine environments) area, and the corrosion may cause fire. In salt area
refers to the region within 500 meters from the coast.
Please consult the CSI Solar Co., Ltd. technical support department on the use of inverters in special climates (i.e. salt,
sulfur, or ammonia areas) which may affect the product warranty.

6 Installation
7 / 19
6.2 Mounting Wall-mounting Bracket
Danger
To avoid electrical shock or other injury, please inspect existing electronic or plumbing installations
before drilling holes.
Installation steps:
1) Use the wall-mounting bracket as a template and mark the positions of the drill holes, then drill the 4 holes
accordingly, as per FIG. 6-6. (Diameter = 11mm, Depth ≥ 55mm）
Note: The external dimensions (W × H) of inverters are shown as a dashed line in FIG. 6-6.
191 45 121
74 160
238 45 153
53 250
CSI-3K-S22002-E (308 x 357mm) CSI-3.68/5K-S22002-E (355 x 435mm)
FIG.6-6 Drilling Positions
2) Drill expansion anchors into the corresponding four holes, and then secure the bracket by using screws, as per FIG.
6-7 & FIG. 6-8.
FIG.6-7 Install Expansion Anchors FIG.6-8 Fix Wall-mounting Bracket
6.3 Installing Inverter
Note: It must be ensured that the wall-mounting bracket is properly fixed was accurately mounted fixed to the wall before
installing the inverter.
Installation steps:
1) Hang the inverter on wall-mounting bracket. Keep balance during the operation to prevent device damage from
colliding with walls or obstacles, as per FIG. 6-9.
2) Use two safety bolts to fix both sides of inverter to ensure the inverter fixed to the wall firmly, as per FIG. 6-10.
FIG. 6-9 Hang the Inverter on Wall-mounting Bracket FIG. 6-10 Fix Both Sides of Inverter

7 Electrical Connection
8 / 19
7 Electrical Connection
7.1 Safety
Danger
Danger to life due to lethal voltages in the inverter!
Before performing any work on the inverter, must disconnect both AC and DC sides.
Warning
Damage to electronic components may happen due to electrostatic discharge. Take appropriate ESD
precautions when replacing and installing the inverter.
7.2 Recommended Cables
Cable Name
Cable Type
Conductor Cross-Sectional Area
Outer Diameter
DC input cable
PV cable, above 600V.
4~6mm2
5.5~7.4mm
AC output cable
Three cores outdoor cable with
copper conductor (L, N, PE).
4~6mm2
10~14mm
PE cable
Single core outdoor cable with
copper conductor.
4~6mm2
N/A
Note: No cable is supplied.
7.3 Meter/CT Connection (Optional)
The inverter has integrated export limitation functionality. To use this function, a power meter or a CT must be
installed.
For installation and operation methods, see ANNEX part of meter and CT installation guides.
7.4 Wiring PE Cable
To achieve ground protection purpose, the inverter must be connected to the AC grounding conductor of the utility
grid via PE cable.
Warning
Because of the transformerless design, the DC positive pole and DC negative pole of PV arrays
cannot do grounding.
Note: The PE point at the AC output point is used only as a PE equipotential point, and cannot substitute for the PE
point on the enclosure.
Procedure steps:
1) Insert the grounding conductor into the suitable terminal lug and crimp the contact.
2) Fix terminal lug on external ground point by screw M4x10. Torque: 1.4 N.m.
FIG. 7-1 External Grounding Point Position

7 Electrical Connection
9 / 19
7.5 Wiring AC Output
Warning
To ensure the inverter can be safely disconnected with load, must install a separate single-phase
circuit-breaker or other load disconnection unit for each inverter.
Note: The inverter is equipped with integrated RCM (Residual current operated monitor) and RCD
(Residual current protective device). The rated residual current of the circuit breaker must be over
300mA when the AC circuit breaker with RCM function selected.
Notice
The total capacity of PV-inverter is more than 3KW and less than or equal 6KW, the inverter's
displacement power factor is adjustable between 0.95 leading to 0.95 lagging, and do not need
external SPI.
The total capacity of PV-inverter is more than 6KW, the inverter's displacement power factor is
adjustable between 0.9 leading to 0.9 lagging, meanwhile need external SPI.
Install an independent two-pole circuit breaker at the output side of the inverter for protection, the recommended AC
circuit-breaker specifications are as follows:
Inverter type
AC circuit-breaker specifications
CSI-3K-S22002-E
25 A
CSI-3.68K-S22002-E
25 A
CSI-5K-S22002-E
32 A
Recommend maximum AC cable length:
Inverter type
Conductor cross section 4.0mm2
Conductor cross section 6.0mm2
CSI-3K-S22002-E
53 (m)
79 (m)
CSI-3.68K-S22002-E
45 (m)
67 (m)
CSI-5K-S22002-E
29 (m)
43 (m)
AC Three-core cable:
The grid connection is established by using three-core wire (L, N, and PE, as per FIG. 7-3).
Components of AC connector:
The AC connector is made of four components: pressure nut, sealing ring, threaded sleeve, plug.
Pressure Nut Sealing Ring Threaded Sleeve Plug (Metal pins and shell)
FIG. 7-2 Components of Connector
AC connectors have two types, EXCEEDCONN type or DEVALAN type, follow-up procedure:
1) Strip the cable’s jacket, and then adjust the relative length of L, N and PE cables, to make the length of PE cable is at
least 5mm longer than L and N ones, as per FIG. 7-3.
30.0
25.0
PE
N
L
50.0
45.0
PE
N
L
EXCEEDCONN type DEVALAN type
FIG. 7-3 Adjust the Cable Length
2）When using flexible cables, the conductor must be connected with suitable core end ferrules according to DIN
46228-4, as per FIG. 7-4.

7 Electrical Connection
10 / 19
8.0 L N PE
FIG. 7-4 Crimp the Three-core’s Ferrule
Insert the L, N, and PE conductors into the corresponding pins of the plug (as per FIG. 7-5), then tighten the fastening
screws by screwdriver to fix conductors firmly.
EXCEEDCONN type (Torque 0.8N.m）:
PE L
N
L
N
PE
A
AA-A
DEVALAN type (Torque 1.4N.m）:
L
N
PE
B
BB-B
N
PE
L
FIG. 7-5 AC Terminal Positions
3) Push the threaded sleeve into the plug, screw the press nut tightly.
EXCEEDCONN type DEVALAN type
FIG. 7-6 Tightening the AC Connector
4) Finally, insert the AC connector into the corresponding AC receptacle on the inverter. Pay attention to the polarities
to make sure the correct assembling.
2
1
EXCEEDCONN type DEVALAN type
FIG. 7-7 Installing the AC Connector

7 Electrical Connection
11 / 19
7.6 Wiring DC Input
Note: The DC connectors are in paired (negative and positive ones). Pay attention to the polarities when assembling.
FIG. 7-8 DC Input Connectors
7.6.1 Requirement for DC input
The single-phase inverters are equipped with one or two MPP trackers.
Requirements for PV modules strings:
1) Same type PV modules for each string.
2) The power, voltage (startup and open-circuit voltage) and operating current of each PV strings must meet the
allowable value of the inverter.
Note: Consider temperature coefficient of the PV modules.
Check the inverter specification in section ANNEX B.
7.6.2 Wiring
Negative Coupler & Contactor Pin Positive Coupler & Contactor Pin.
FIG. 7-9 Structure Illustration of DC Connector
Procedure steps
1) Strip the insulation of cable to about 7.5mm with the wire stripper tool. Note do not damage the conductors when
do the stripping, as per FIG. 7-10.
2) Place the contact around the conductors of the stripped cable, then crimp the contact with wire crimping pliers, as
per FIG. 7-11.
Ensure the conductors completely wrapped without loosening or damage.
FIG. 7-10 Strip the Cable Insulating Layer FIG. 7-11 Crimp the Contact

7 Electrical Connection
12 / 19
3) Insert the crimped contact pin into the connector back until one click audibly. Pull lightly on the cable to ensure the
contact pins of the connectors are engaged. Pay attention to the polarities when assembling.
4) Tighten the nut with a special wrench. Torque: 2.5~2.9 N.m.
FIG. 7-12 Insert the Contact FIG. 7-13 Tighten the Cable Gland
5) Insert the assembled connectors into the bottom terminal of the inverter until one sound click audibly.
The locked DC connectors can only be disconnected with special tool.
FIG. 7-14 Illustration of DC Ports
7.6.3 Connecting PV array (DC input)
Danger
Ensure the DC switch and AC breaker both are disconnected from the inverter before connect the PV
arrays.
Never connect PV array positive or negative pole to the ground, it could cause serious damages to the
inverter.
Danger
Improper operation during the wiring process can cause fatal injury to the operator or unrecoverable
damage to the inverter.
Only qualified personnel can perform the wiring work.

8 Communication
13 / 19
8 Communication
8.1 Communication Mode
Multi communication patterns for option, RS485 (Built-in module), and WiFi, with the communication port M16.
8.2 External WiFi
More details for installation and operation methods please refer to the WiFi data logger user manual.
FIG. 8-1 Communication Port
Communication scheme:
The inverter supports two networking scenarios to operate, as per FIG. 8-2.
1) Standard Mode: Connect to internet and operate the inverter through CSI cloud (web or App).
2) Local Mode: Connect and operate the inverter locally without internet.
Solution 1
Router Monitoring system APP Web
Solution 2
Local Mode
FIG. 8-2 Monitoring Solutions
Note: For the monitoring and local APP information, please refer to documents published on our website at:
https://monitoring.csisolar.com/platformSelect.
8.2 RS485
Connect the communication port with a RS485-to-usb port converter via RS485 serial line, and then connect this
module to PC.

9 Commissioning Inverter
14 / 19
9 Commissioning Inverter
9.1 Electrical Inspection
1) Check PE connections with multi-meter:
To make sure all the bare metal surfaces of the inverter are grounded.
2) Check DC voltage value:
Check if the DC voltage of the PV string exceeds the allowable range.
3) Check the polarities of the DC voltage:
To make sure the DC polarities are correct.
4) Check the ground insulation of PV array with multi-meter:
Ensure the impedance value of ground insulation is more than 1MOhm.
5) Check all the inverter terminals:
Ensure all unused terminals of the inverter are properly sealed with protection covers.
6) Do not remove protection covers of all the terminals before wires connected, such as DC, AC, CT/Meter and WiFi
terminals. Otherwise, the IP rating will be affected.
9.2 Mechanical Inspection
1) Ensure the inverter is installed properly, fixed with a Wall-mounting bracket firmly, and the upper cover is installed
correctly.
2) Ensure the AC connectors are installed properly and fixed firmly.
3) Ensure the dust covers are sealed reliably which are used for the empty DC connectors.
4) Ensure all the cables are connected effectively, fixed firmly, and no visible damages to the insulation layers.
9.3 Start-UP Inverter
After electrical and mechanical inspections, first turn on the AC main switch/breaker, then turn on the DC switch. The
inverter will start automatically when the DC input voltage meets the performance requirement of the utility grid.
Normally there will be three statuses during the operation (refer to the LED indications):
1) Waiting:
Conditions: The initial DC voltage of the PV strings is greater than the Min. DC input voltage, but is lower than the DC
start-up input voltage.
Inverter cannot start-up normally and cannot feed power into utility grid either.
2) Checking:
Conditions: The initial voltage of the PV strings exceeds the start-up DC input voltage of the inverter. Meanwhile both
the voltage and frequency of the utility grid are normal.
Inverter will check the feeding conditions immediately. If anything wrong during checking, inverter will switch to the
“Fault” mode.
3) Normal:
Conditions: All the checking results are normal.
Inverter will switch to “Normal” mode and feed power into utility grid.
The inverter may turn on and off continuously during the period of low or absent sunlight due to the shortage of
power generated by the PV modules. If such fault occurs frequently, please contact the maintenance personnel.
9.4 LED Indicators
No.
Operate states
LED Indicators
Flicker frequency
1
Wait
Green LED flicker
1s On，1s Off
2
Normal
Green LED always on
/
3
Error
Red LED always on
/
4
No DC input
Off
/
9.5 Switch off
DANGER
Never connect or disconnect the DC connectors under load.
Inverter Turn-off steps:
1) Turn off the AC main switch to prevent it from being reactivated.
2) Turn off the DC switch.
3) Check the inverter operating status.
4) Wait until LED indicator has gone out, which indicates the inverter has been shut down.

10 Daily Maintenance
15 / 19
10 Daily Maintenance
DANGER
Risk of inverter damage or personal injury due to incorrect service!
Always keep in mind that the inverter is powered by dual sources: PV array and utility grid.
Before any service work, observe the following procedure.
1) Disconnect the inverter from the utility grid side first and then PV array;
2) Wait at least 5 minutes after shut down the inverter, for inner capacitors to discharge completely;
3) Verify that no voltage and current existing with appropriate testing devices.
NOTICE
Risk of inverter damage if it is improperly serviced.
Use accessories and spare parts approved by the inverter manufacturer only. Never modify the inverter or other
components of the inverter. The loss of any or all warranty rights may follow if otherwise.
NOTICE
Any malfunction that may impair the inverter safety operation must be repaired immediately before the inverter
is restarted.
Inverter contains no customer serviceable parts inside. Please contact local authorized personnel if any service
work is required.
Information
Servicing of the device in accordance with the manual should never be undertaken in the absence of proper
tools, test equipment or the more recent revision of the manual with has been clearly and thoroughly
understood.
Items
Methods
Period
System
clean
Check the temperature and dust of the inverter. Clean the inverter enclosure.
Check the humidity and dust of the environment.
Meanwhile check whether the filter function of the air inlet is ok.
Six months to a year (it
depends on the dust
contents in air.)
11 Troubleshooting
When the inverter does not operate normally, we recommend the following actions for quick troubleshooting. Please
review the error list table carefully.
11.1 Warning
The different LED colors and flashing status identify the current operation statuses of the inverter. If the red color is
always on, it indicates the inverter fault. Usually the warnings can be cleared through an orderly shutdown / reset or a
self-corrective action performed by the inverter.
11.2 Errors
Error codes identify a possible equipment fault, or incorrect setting/ configuration. Any and all attempts to correct or
clear a fault must be performed by qualified personnel. Typically, the Errors code can be cleared once the cause or
fault is removed.
However, some of the (E) codes may cannot be cleared, in this case please contact the dealer or CSI Solar Co., Ltd. to
replace a new one.
Errors as indicated in the table below:

11 Troubleshooting
16 / 19
Error
Code
Error Message
Suggestion
F-100
Over temperature
1. Check heatsink for obstructions/ventilation.
2. Check the ambient temperature around the inverter.
F-101
High DC input voltage
1. Disconnect the DC switch, remove the DC connector, measure the voltage of the PV string,
and check if it exceeds the input-voltage specification of the inverter.
2. If exceed the specification, re-layout the PV module string.
3. If not exceed the specification, while the error still exits, please contact Customer Service.
F-103
Unconnected grid
1. Turn off DC switch, remove AC connector, measure the voltage between fire line and the
zero line, then check if it is consistent with the grid-connected specification of inverter.
2. Inconsistent, check if the AC main switch is connected, check if the power supply is normal
working.
3. Consistent, connect the AC connector, turn on the DC Switch.
4. If error message still exists, contact Customer service.
F-104
Inverter grid-connected relay
fault
Contact Customer service.
F-105
Grid frequency fault
1. If power grid frequency returns to normal, the inverter will restore the grid connection
automatically.
2. If error message still exists, contact Customer service.
F-106
Grid voltage fault
1. Turn off DC switch, remove AC connector, measure the voltage between fire line and the
zero line, then check if it is consistent with the grid-connected specification of inverter.
2. Inconsistent, check the grid layout.
3. Consistent, connect the AC connector, turn on DC Switch, inverter will restore the grid
connection automatically.
4. If error message still exists, contact Customer service.
F-107
DC component over range
1. Restart inverter.
2. If error message still exists, contact Customer service.
F-108
Current sensor fault
1. Wait until inverter restores normal work.
2. If error message still exists, contact Customer service.
F-110
Leakage current detection unit
fault
1. Check if there is any PV cable breakage.
2. Check if the PV modules grounding improperly.
3. Restart inverter.
4. If error message still exists, contact Customer service.
F-111
Leakage current fault
1. Check if PV strings grounding properly.
2. If error message still exists, contact Customer service.
F-112
DC insulation fault
1. Check if inverter grounding properly.
2. Check if the positive and negative poles of PV modules are short out to the PE cable.
3. Wait until inverter restores normal work.
4. If error message still exists, contact Customer service.
F-113
Leakage current detection
consistency error (Major)
1. Restart the inverter.
2. If error message still exists, contact Customer service.
F-114
Frequency detection
consistency error (Major)
1. Restart the inverter.
2. If error message still exists, contact Customer service.
F-115
Power grid voltage detection
consistency error (Major)
F-116
Leakage current detection
consistency error (Minor)
F-117
Frequency detection
consistency error (Minor)
F-118
Power grid voltage detection
consistency error (Minor)
F-123
Secondary memory failure
1. Restart the inverter.
2. If error message still exists, contact Customer service.
F-124
Clock failure
F-125
Internal communication
failure
F-129
Main memory failure

12 Handling the Inverter
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12 Handling the Inverter
12.1 Removing Inverter
1) Turn off the inverter as described in section 10 and section 11.
2) Remove all the connection cables from the inverter.
3) Unscrew the fixing screws on both sides of the inverter.
4) Remove the inverter from the bracket.
Note: Before performing any work, ensure that you are familiar with this document.
12.2 Packing Inverter
If possible, use the original packaging, or the packaging that is suitable for the weight and dimensions of the inverter.
12.3 Disposing Inverter
Do not dispose the obsolete inverters or accessories together with household waste. Please refer to the
disposal regulations.