SAJ Sununo Plus 4K-M - User Manual

Questions and Answers

P
Patrick JonesAug 16, 2025
What to do if my SAJ Inverter shows AC Voltage Error?
- K
  Katie HernandezAug 16, 2025
  If your SAJ Inverter displays an AC Voltage Error, verify the grid voltage and the connection between the inverter and the grid. Also, check the inverter's on-grid standard settings. If the grid voltage exceeds local regulations, consult with local grid personnel about adjusting the voltage at the feed point or modifying the regulated voltage value. If the grid voltage is within the regulated range and the error persists, contact your distributor or SAJ.
M
Michael LeeAug 19, 2025
What should I do if my SAJ Sununo Plus 4K-M Inverter displays a Temperature High Error?
- I
  iwhiteheadAug 19, 2025
  If your SAJ Inverter shows a Temperature High Error, check if the radiator is blocked and ensure the inverter is operating within an appropriate temperature range. If these checks are normal, contact your distributor or SAJ.
B
Brian BlairAug 22, 2025
What to do if my SAJ Sununo Plus 4K-M Inverter displays a Frequency Error?
- A
  Annette MartinezAug 22, 2025
  If your SAJ Inverter shows a Frequency Error, check the country settings and the local grid frequency. If these are normal, contact your distributor or SAJ.
W
whitejamieAug 26, 2025
What to do if my SAJ Sununo Plus 4K-M Inverter displays a Current High error?
- J
  Jimmy MitchellAug 26, 2025
  If your SAJ Inverter displays a Current High error, check the connection status between the inverter and the grid and test the stability of the grid voltage. If these are normal, contact your distributor or SAJ.
S
Sandra SchmidtAug 28, 2025
What to do if my SAJ Inverter displays GFCI Error?
- E
  Eric MorrisAug 28, 2025
  If your SAJ Inverter shows a GFCI Error, check the insulation resistance of the positive and negative sides of the solar panel. Also, verify that the inverter is not in a wet environment and that the grounding is properly connected. If these checks are normal, contact your distributor or SAJ.
R
Roger LoganAug 31, 2025
What to do if my SAJ Sununo Plus 4K-M Inverter displays ISO Error?
- K
  Karla Herring PhDAug 31, 2025
  If your SAJ Inverter displays an ISO Error, check the insulation resistance of the positive and negative sides of the solar panel. Also, check if the inverter is in a wet environment and ensure the inverter's grounding is secure. If these checks are normal, contact your distributor or SAJ.
J
Jeffrey Macias DDSSep 3, 2025
What to do if my SAJ Sununo Plus 4K-M Inverter displays No Grid Error?
- K
  Kim WoodsSep 3, 2025
  If your SAJ Inverter displays a No Grid Error, check the connection status between the AC side of the inverter and the grid. If this is normal, contact your distributor or SAJ.
J
Jon WaltonSep 6, 2025
What to do if my SAJ Sununo Plus 4K-M displays a Bus Voltage High error?
- A
  Anna NormanSep 6, 2025
  If your SAJ Inverter displays a Bus Voltage High error, check the settings of the solar panel, a SAJ designer can help you. If this is normal, contact your distributor or SAJ.
K
Kenneth CarlsonSep 9, 2025
What does Lost Communication mean on my SAJ Sununo Plus 4K-M Inverter?
- J
  James Robinson IISep 9, 2025
  If your SAJ Inverter shows a Lost Communication error, check the connection of the communication cables between the control board and the display board. If this is normal, contact your distributor or SAJ.
G
Gary GillSep 12, 2025
What to do if my SAJ Sununo Plus 4K-M Inverter displays PV Voltage Fault?
- W
  William MaciasSep 12, 2025
  If your SAJ Inverter displays a PV Voltage Fault, check the settings of the solar panel, a SAJ designer can help you. If this is normal, contact your distributor or SAJ.

Summary

Chapter 1 Safety Precautions

1.2 Safety Instructions

Explains the meaning of DANGER, WARNING, CAUTION, and NOTICE symbols for safe operation.

Chapter 2 Preparation

2.1 Safety Instructions

Provides critical safety guidelines regarding electrical shock, high voltage, and environmental conditions.

Chapter 4 Installation Instructions

4.1 Safety Instructions

Warns about potential dangers of fire, electricity shock, and high voltage during the installation process.

4.3 Installation Method and Position

Details the recommended mounting methods and optimal locations for installing the inverter.

4.4 Mounting Procedure

Outlines the steps for marking drill holes, drilling, and securely mounting the inverter onto its rear panel.

Chapter 5 Electrical Connection

5.1 Hot-line Job Safety Instructions

Emphasizes critical safety precautions for professional technicians performing electrical connections on live equipment.

5.3 AC Side Connection

Provides guidelines for safely connecting the AC power cable, including cable specifications and connection steps.

5.4 DC Side Connection

Chapter 6 Debugging Instructions

6.2 First Run Setup

6.2.3 LCD Menu Navigation

6.2.4 General Parameter Settings

6.2.5 Inverter Self-Tests

Outlines the procedures for performing various internal self-tests, including protection mechanisms.

Chapter 7 Fault Code and Troubleshooting

7.1 Error Codes and Fault Information

Lists specific error codes, their associated fault information, and detailed explanations.

7.2 Troubleshooting Guide

Provides step-by-step troubleshooting guidance for common fault conditions encountered with the inverter.

SAJ Warranty Policy

Warranty Claim Conditions

Warranty Claim Requirements

Service Procedures

SAJ Sununo Plus 4K-M Specifications

General

Number of MPPTs	2
Max. Output Power	4000 W
Nominal AC Voltage	230 V
Max. AC Current	18.2 A
Max. Efficiency	98.4%
Protection Degree	IP65
Rated Power	4000 W
Max. Input Current per MPPT	11 A
Output Voltage	230 V
Output Frequency	50 Hz / 60 Hz
Peak Efficiency	98.4%
Operating Temperature Range	-25°C to +60°C
Cooling Method	Natural Convection
Protection Level	IP65