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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

  • J
    Janet OdonnellSep 3, 2025
    What does HW Red ADC1 (F18) error mean on my Delta Inverter?
    • J
      Jaclyn FranklinSep 4, 2025
      If your Delta Inverter is showing a 'HW Red ADC1 (F18)' error, it may be caused by: 1. Insufficient input power, so check the input voltage, which must be >150Vdc. 2. Auxiliary power circuitry malfunction, so check the auxiliary circuitry inside the inverter. 3. A detection circuit malfunction, and you should contact customer service for technical support.
  • L
    lucasrobersonAug 25, 2025
    What should I do if my Delta Inverter displays AC Volt Low (E10, E15, E20)?
    • E
      Eric ParkAug 25, 2025
      If your Delta Inverter displays 'AC Volt Low' (E10, E15, E20), the issue might stem from a few potential causes. Initially, verify that the actual utility voltage is within the suitable range, as it may be under the UVR setting. Also, incorrect Grid code or Grid settings could be the cause, so check them. Another potential cause is wrong connections in the AC terminal, so check the AC terminal connections. If these steps don't resolve the issue, there might be a detection circuit malfunction, in which case you should contact customer service for technical support.
  • J
    Johnny JohnsonAug 25, 2025
    Why does my Delta M60U show 'No Grid (E09)' error?
    • C
      Cassandra WebsterAug 26, 2025
      If your Delta Inverter is showing a 'No Grid (E09)' error, the possible causes are: 1. The AC breaker is OFF. In this case switch on the AC breaker. 2. There is a disconnection in the AC terminal. In this case check the connection in the AC terminal and ensure it connects to the inverter.
  • R
    roger13Sep 12, 2025
    How to fix Insulation (E34) error on Delta Inverter?
    • J
      justin78Sep 12, 2025
      To resolve the Insulation (E34) error on your Delta Inverter, check the insulation of the solar inputs. Also, inspect the capacitance and dry the PV panel if necessary.
  • H
    hwilsonSep 18, 2025
    What causes HW RLY (F13) error on Delta M60U?
    • R
      Randy WeberSep 18, 2025
      The HW RLY (F13) error on your Delta Inverter can be caused by a defective driver circuit for the relay, a defective relay(s), or a detection circuit malfunction (Inverter voltage). Check the input voltage, it must be >150Vdc. Replace the defective relay.
  • D
    David GilbertSep 7, 2025
    What does Bus Unbal. (F30) error mean on my Delta Inverter?
    • R
      Rachel FloresSep 7, 2025
      If your Delta Inverter displays 'Bus Unbal. (F30)', it may be caused by: 1. Not totally independent or parallel between inputs, so check the inputs connections. 2. PV Array short to Ground, so check the PV Array insulation. 3. Driver for boost is defective or disconnected, so contact customer service for technical support.
  • M
    Michael CunninghamAug 31, 2025
    What should I do if my Delta M60U Inverter shows HW NTC2 Fail (F08)?
    • M
      Mr. Oscar RoseAug 31, 2025
      If your Delta Inverter displays 'HW NTC2 Fail (F08)', it could be due to: 1. Ambient temperature >90 ? or
  • A
    Amber JenkinsSep 23, 2025
    What causes HW COMM1 (F23) error on Delta M60U?
    • D
      Dawn HansenSep 23, 2025
      The HW COMM1 (F23) error on your Delta Inverter can be caused by DSP idling, a disconnected communication connection, or a malfunctioning communication circuit. Check the connection interface RS-485 and the communication card.
  • A
    Ariel HendersonSep 14, 2025
    What does Solar2 Low (W02) mean on my Delta M60U?
    • C
      Christopher RodriguezSep 14, 2025
      If your Delta Inverter displays Solar2 Low (W02), it indicates that the MPPT2 input voltage is under the limit, some devices were damaged inside the inverter if the actual MPPT 2 voltage is close to '0', or there is a detection circuit malfunction. Check the MPPT 2 input voltage to the inverter terminal and all switching devices in boost2.
  • M
    meyerangelaAug 28, 2025
    How to troubleshoot Solar1 High (E30) error on Delta Inverter?
    • A
      anthonyrobertsonAug 28, 2025
      If your Delta Inverter shows 'Solar1 High (E30)', it might be caused by: 1. MPPT 1 input voltage being over 1000Vdc, so modify the solar array setting to make the Voc less than 1000Vdc. 2. 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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