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

Default Chapter3
- Table of Contents3
1 Safety10
- Information of the Inverter10
- Legal Provisions10
- Target Group10
- General Safety11
- Condition of Use11
- Symbols12
2 Introduction14
- Valid Model14
- Product Overview15
3 Installation24
- Mechanical Installation24
- Vertical Wall Mount24
- Horizontal or Tilt Mount25
- Mounting Bracket27
  - New Models with New Version of Mounting Bracket28
  - Old Models with New Version of Mounting Bracket30
- Accessories35
- 120 Models42
  - AC Wiring for M80/60U44
- 121 Models (with RSD)44
- AC Wiring for M80/60U Models (Without RSD)45
- 121 Models50
4 Commissioning64
- Display Operation Introduction64
- First Startup66
- Home Page67
- Main Menu67
- Power Meter68
  - 122 )68
- Energy Log69
5 Maintenance83
- Removing and Re-Installing the Wiring Box (WB) Cover83
- Removing the WB Cover84
- Re-Installing the WB Cover84
- Replacement of Surge Protection Devices (SPD)85
- Replace Internal String Fuse90
- Smart Fans Replacement and Filter Cleaning94
- Wiring Box (WB) Compartment Fan97
- Power Module (PM) Fan Tray98
- PM Fan Tray Removal Procedure98
- Procedures to Remove PM Air Inlet Filter100
- Release AFCI Fault Protection100
- Commissioning101
6 Error Message and Trouble Shooting103
- Error Codes103
- Warning Codes104
- Fault Codes105
- Calling for Help109
- Service Call Checklist109
7 Technical Information110
- Technical of M80U Series110
- Technical of M60U Series113
Appendix A-1: Low and High Voltage Ride-Through Set-Points and Timing Per Table SA9.1D116
Appendix A-2: Low and High Frequency Ride-Through Set-Points and Timing Per Table SA10.1116
APPENDIX: Grid Support Utility Interactive Inverters116
- Appendix A: Rule 21116
Appendix A-3: CA R21 Settings - Normal Ramp Rate (RR) & Soft-Start Ramp Rate (SS)117
Appendix A-4: CA R21 Settings - Soft-Start Ramp Rate Test117
Appendix A-5: CA R21 Settings - Specified Power Factor117
Appendix A-6: CA R21 Settings - Volt/Var Mode (Q(V))118
Appendix A-7: CA R21 Settings - Frequency-Watt (FW)118
Appendix A-8: CA R21 Settings - Volt-Watt (VW)119
Appendix B-1: Full Frequency Ride-Through Settings for O'ahu, Hawai'I Island, and Maui (HECO A)120
Appendix B-2: Full Frequency Ride-Through Settings for Moloka'I and Lana'I (HECO B)120
Appendix B-3: Full Voltage Ride-Through Settings for O'ahu, Hawai'I Island, Maui, Moloka'I, and Lana'I120
- Appendix B: HECO120
Appendix C-1: Assembly Note for All Model123
Appendix C: Assembly Note123
Appendix C-2: Assembly Note for 120 Model124
Appendix C-3: Assembly Note for 121 Model (with RSD)125
Appendix C-4: Assembly Note for 121 Model (Without RSD)126
Appendix C-5: Assembly Note for 122 Model127

Questions and Answers:

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.
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.
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.
S
Shelley BurnsSep 18, 2025
What does HW DSP ADC1 (F15) error mean on Delta M60U?
- Z
  Zachary BoydSep 18, 2025
  The HW DSP ADC1 (F15) error on your Delta Inverter indicates insufficient input power, an auxiliary power circuitry malfunction, or a detection circuit malfunction. Check the input voltage, ensuring it is >150Vdc. Check the auxiliary circuitry inside the inverter.
K
Kristen SingletonSep 23, 2025
What causes Ground Cur. (F24) error on Delta Inverter?
- A
  Angela BeckerSep 23, 2025
  The Ground Cur. (F24) error on your Delta Inverter can be caused by a PV array insulation fault, large PV array capacitance between Plus to Ground or Minus to Ground, malfunction of either side of boost driver or boost choke, or a detection circuit malfunction. Check the insulation of Solar inputs. Check the capacitance (+ GND & - GND), must < 2.5uF. Install external transformer if necessary
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.
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.
K
Kathleen GonzalezAug 26, 2025
How to fix AC Freq High (E01) error on my Delta M60U Inverter?
- T
  Tracy MitchellAug 26, 2025
  If the Delta Inverter displays 'AC Freq High (E01)', it could be due to several reasons: 1. The actual utility frequency is over the OFR setting, so check the utility frequency. 2. The Grid code setting is incorrect, so check it. 3. In case the issue persists, there may be a detection circuit malfunction, and 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.

Delta M60U Specifications

General

AC Voltage [V]	400
Output Power	60 kVA
Frequency	50 / 60 Hz
Category	Inverter
Output Voltage	400 V
Protection Features	Overvoltage protection

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.

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