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Delta M60U - User Manual

Delta M60U
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M80U
M60U
Operation and Installation Manual
Grid-tie Transformerless Solar Inverter
The power behind competitiveness
www.deltaww.com

Table of Contents

Questions and Answers

  • I
    iclarkAug 29, 2025
    What does Solar1 Low (W01) error mean on my Delta M60U Inverter?
    • L
      Lisa TaylorAug 29, 2025
      If your Delta Inverter is showing a 'Solar1 Low (W01)' error, it might be because: 1. MPPT 1 input voltage is under the limit, so check the MPPT 1 voltage connection to the inverter terminal. 2. Some devices were damaged inside the inverter if the actual MPPT 1 voltage is close to "0", so check all switching devices in boost1. 3. There is a detection circuit malfunction, and you should contact customer service for technical support.
  • S
    sanchezamyAug 29, 2025
    Why is my Delta M60U Inverter showing a Temperature (F07) error?
    • D
      Darin WebsterAug 29, 2025
      If the Delta Inverter displays 'Temperature (F07)', it could be due to: 1. Ambient air is less than -30?, so check the installation ambient and environment. 2. A detection circuit malfunction, and you should contact customer service for technical support.
  • E
    Elizabeth JonesAug 28, 2025
    What does AC Surge DC Surge error mean on my Delta Inverter?
    • F
      Francisco GreerAug 29, 2025
      If your Delta Inverter displays 'AC Surge DC Surge', possible causes include: 1. The inverter was struck by lightning, so check the inverter’s status. 2. One or more SPD are defective, so replace the defective SPD. 3. One or more SPD are disconnected, so check the connections of SPDs. 4. A detection circuit malfunction, so check the connection in AC terminal. 5. Wrong connection in AC terminal, so contact customer service for technical support.
  • C
    cookloriAug 28, 2025
    What causes Solar2 High (E31) error on my Delta Inverter?
    • J
      john82Aug 28, 2025
      If your Delta Inverter displays 'Solar2 High (E31)', it could be due to: 1. MPPT 2 input voltage being over 1000Vdc, so modify the solar array setting, and ensure the Voc is less than 1000Vdc. 2. A detection circuit malfunction, and you should contact customer service for technical support.
  • M
    Michael VelasquezAug 31, 2025
    What causes HW NTC3 Fail (F09) error on my Delta M60U Inverter?
    • J
      Jason PerezSep 1, 2025
      If your Delta Inverter displays 'HW NTC3 Fail (F09)', the problem might be: 1. Ambient temperature >90 ? or
  • B
    brian58Aug 27, 2025
    What does DC Injection (F01, F02, F03) mean on Delta M60U Inverter?
    • E
      Eric SharpAug 27, 2025
      If the Delta Inverter displays 'DC Injection (F01, F02, F03)', it might be because: 1. The utility waveform is abnormal, so check the utility waveform and ensure the grid connection of the inverter is far away from any non-linear load if necessary. 2. There is a detection circuit malfunction, and you should contact customer service for technical support.
  • T
    Thomas MckeeAug 27, 2025
    What does AC Con. Fail (E08) error mean on my Delta M60U Inverter?
    • A
      Adam GibsonAug 27, 2025
      If your Delta Inverter displays 'AC Con. Fail (E08)', it could be due to: 1. Wrong connection in AC terminal, so check the AC connection in accordance with the user manual. 2. A detection circuit malfunction, and you should contact customer service for technical support.
  • M
    Mrs. Kristina FowlerAug 27, 2025
    Why is my Delta M60U showing a Temperature (F05) error?
    • K
      Kevin LewisAug 27, 2025
      If your Delta Inverter shows 'Temperature (F05)' error, it may be due to: 1. The ambient air being over 60? (The installation is abnormal), so check the installation ambient and environment. 2. A detection circuit malfunction, and you should contact customer service for technical support.
  • M
    Matthew SteeleAug 27, 2025
    What does Insulation (E34) error mean on my Delta M60U Inverter?
    • J
      jasminedicksonAug 27, 2025
      If your Delta Inverter displays 'Insulation (E34)' error, possible causes include: 1. A PV array insulation fault, so check the insulation of Solar inputs. 2. Large PV array capacitance between Plus to Ground or Minus to Ground or both, so check the capacitance, and dry PV panel if necessary. 3. If none of the above steps work, there may be a detection circuit malfunction, and you should contact customer service for technical support.
  • R
    Rachael FrankAug 26, 2025
    What causes AC Freq Low (E02) on my Delta M60U Inverter and how to resolve it?
    • C
      Carmen PattersonAug 26, 2025
      If your Delta Inverter displays 'AC Freq Low (E02)', the issue might be due to several reasons: 1. The actual utility frequency is under the UFR setting, so check the utility frequency. 2. The Grid code or Grid setting is incorrect, so check them. 3. If the issue persists, there may be a detection circuit malfunction, and you should contact customer service for technical support.

Summary

Safety

Information of the Inverter

Provides legal provisions and identifies the target audience for the manual.

General Safety

Covers essential safety practices, warnings, and symbols for safe operation.

Introduction

Valid Model

Lists the supported inverter model numbers for which this manual is applicable.

Product Overview

Details the inverter's components, models, and general features with diagrams.

Installation

Mechanical Installation

Guides on physical mounting of the inverter, including wall and tilt options.

Electrical Installation for AC Wiring

Covers AC wiring procedures, connections, and required devices for grid connection.

Electrical Installation for DC Wiring

Covers DC wiring procedures, connections, and grounding for PV array inputs.

Communication Module Connections

Explains how to connect communication modules and RS-485 interfaces.

Commissioning

First startup

Outlines the initial setup routine for language, grid code, and ID settings.

Main Menu Functions

Introduces the inverter's operational menu, including monitoring and settings.

Install Settings

Accesses critical configuration parameters like Inverter ID, Grid Code, and Grid Settings.

Maintenance

Removing and re-installing the Wiring Box (WB) cover

Provides procedures for accessing the inverter's internal components.

Component Replacement

Procedures for replacing SPD, fuses, and fans, ensuring system integrity.

De-Commissioning

Outlines the safe procedure for removing the inverter from operation.

Error message and Trouble Shooting

Error, Warning, and Fault Codes

Lists common error messages, their causes, and troubleshooting actions.

Calling for Help

Provides information required for contacting technical support efficiently.

Technical Information

M80 U Series Specifications

Lists detailed technical specifications for the M80U inverter models.

M60 U Series Specifications

Lists detailed technical specifications for the M60U inverter models.

APPENDIX: Grid Support Utility Interactive Inverters

Appendix A: Rule 21

Details CA Rule 21 settings for voltage and frequency ride-through.

Appendix B: HECO

Provides HECO specific settings for ride-through capabilities.

Appendix C: Assembly Note

Offers assembly guidance and screw torque specifications for various models.

Delta M60U Specifications

General IconGeneral
AC Voltage [V]400
Output Power60 kVA
Frequency50 / 60 Hz
CategoryInverter
Output Voltage400 V
Protection FeaturesOvervoltage protection

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