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R3 Pre
Series
R3-15K
R3-17K
R3-20K
R3-25K

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Table of Contents
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Summarization of Contents

Introduction
1.1 Introduction
Description of the manual's purpose and scope for solar inverters.
1.2 Applied Designations
Explanation of symbols and information levels used throughout the manual.
1.3 Important Safety Information
Crucial safety guidelines and warnings for installation, operation, and maintenance.
1.4 System Sizing
Guidance on dimensioning photovoltaic systems for optimal energy yield and inverter compatibility.
Technical Description of Inverters
2.1 Mechanical Design
Details the physical dimensions, outline, and component identification of the inverters.
2.2 Electrical System Design
Presents the internal wiring diagram and system architecture of the inverter.
2.3 Technical Data
Comprehensive table listing technical specifications and parameters for the inverter models.
2.4 Grid Codes
Lists national and regional grid codes supported by the inverter for grid connection compliance.
Installation and Startup
3.1 Package Information
Details the components included in the inverter package for installation.
3.2 Installation Environment
Specifies optimal conditions and requirements for the inverter's installation site.
3.3 Installation Position
Guides on selecting the optimal mounting location and required clearances for heat dissipation.
3.4 Mounting Procedure
Step-by-step instructions for physically mounting the inverter onto a wall.
3.5.1 Connection to the Grid (AC Output)
Instructions for safely connecting the inverter to the AC power grid.
3.5.2 Connection to PV String (DC Input)
Guidelines for connecting the solar panel strings to the inverter's DC input.
3.5.3 Communication Connection
Overview of available communication ports and methods for monitoring and control.
3.6 Starting the Inverter
Procedures for safely starting up and commissioning the inverter after installation.
User Interface
4.1 LED and Key
Describes the status indicators (LEDs) and control buttons on the inverter's front panel.
4.2.1 Setting Language
How to select the display language for the inverter's LCD screen.
4.2.2 Setting Date & Time
Procedure for configuring the date and time settings on the inverter's LCD.
4.2.3 Setting PV Configuration
Steps to configure the inverter's photovoltaic input parameters.
4.2.4 Setting Communication Address
Instructions for setting communication addresses for network or serial communication.
4.2.5 Setting Safety
Configuration options related to safety parameters and protection settings.
4.2.6 Setting Export Control
How to configure settings for controlling power export to the grid.
4.2.7 Upgrading the Inverter
Procedure for updating the inverter's firmware via USB.
4.2.8 Factory Reset
Instructions on how to restore the inverter to its factory default settings.
4.2.9 Error Logs
How to access and interpret error logs for troubleshooting inverter issues.
4.2.10 About
Displays information about the inverter model, serial number, and software versions.
4.3 Self-Test in Accordance with CEI 0-21 (Applies to Italy only)
Guide for performing self-tests required for Italian grid compliance.
Warranty
5.1 Warranty Claim Procedure
Steps for initiating a warranty claim for a defective inverter, including required information.
5.2 Service After Warranty Expiration
Information on services and associated costs for inverters that are out of warranty.
Maintenance
6.1 Routine Maintenance
Recommended maintenance tasks and their frequency for optimal inverter performance.
6.2 Fan Maintenance
Instructions on cleaning or replacing the inverter's cooling fans to ensure proper operation.

Table of Contents