Delta M15A 220 Specification sheet

M15A_220 / M20A_220
Operation and Installation Manual
Grid-tie Transformerless Solar Inverter
www.deltaww.com
English 1
63
繁體中文

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Contents
1 Safety
1.1 Information of the Inverter
1.1.1 Legal Provisions
1.1.2 Target Group
1.2 General Safety
1.2.1 Condition of Use
1.2.2 Symbols
2 Introduction
2.1 Valid Model
2.2 Product Overview
3 Installation
3.1 Unboxing & Review
3.2 Vertical wall mount
3.3 Electrical Installation for AC Wiring
3.3.1 AC Grid Types and Connections
3.3.2 Required Protective Devices
3.3.3 AC Wiring Preparation
3.3.4 AC Wiring
3.4 Electrical Installation for DC Wiring
3.5 Equipment Grounding
3.6 Communication Module Connections
3.6.1 Accessing the Communication Module
3.6.2 RS-485 Connection
3.6.3 EPO Function & Digital Input
3.6.4 Dry Contact Connection
3.6.5 Rapid Shutdown System Connection (optional)
3.6.6 SUB_1G (optional)
3.7 Wi-Fi
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3

4 Commissioning
4.1 LED Signals
4.2 Auto ID Commission
4.2.1 Commission Setting (DSS)
4.2.2 Scan inverter
4.2.3 Set ID
4.2.4 Set Country
4.2.5 Synchronize time
4.3 Delta Function Setting
5 Maintenance
5.1 Open and Close the Door
5.1.1 Open Door
5.1.2 Close Door
5.2 Replacement of Surge Protection Devices (SPD)
5.2.1 Replace AC SPD
5.2.2 Replace DC SPD
5.3 De-Commissioning
6 Error Message and Trouble Shooting
6.1 Error Codes (Field Fault)
6.2 Fault Codes (Inverter Fault)
6.3 Warning Codes (Field Warning)
6.4 Warning Codes (Inverter Warning)
7 Technical Information
Appendix: Assembly Note
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4

Figure 2-1: Components
Figure 2-2: Overview
Figure 2-3: Rating label
Figure 3-1: Steps to unpacke the inverter
Figure 3-2: Attaching the Hoisting hooks
Figure 3-3: Inverter dimensions
Figure 3-4: Mounting bracket dimensions
Figure 3-5: Positions of mounting screws
Figure 3-6: Separation distance of plural inverters
Figure 3-7: Permitted and prohibited mounting positions
Figure 3-8: Strip the wires
Figure 3-9: Assemble the AC plug
Figure 3-10: The rubber rings of AC gland
Figure 3-11: AC wiring
Figure 3-12: Rotate the AC plug to fit
Figure 3-13: DC wiring illustration
Figure 3-14: Location of H4 connectors to connect array wiring (DC)
Figure 3-15: Mount the equipment grounding
Figure 3-16: Communication module layout
Figure 3-17: Location and access to communication module
Figure 3-18: Multiinverter connection illustration
Figure 3-19: EPO and digital input function terminal block
Figure 3-20: Dry Contact connection
Figure 3-21: Rapid Shutdown System connection
Figure 3-22: Installation and wiring of SUB_1G
Figure 3-23: Installation of Wi-Fi antenna
Figure 4-1: LED indicators
Figure 4-2: DSS Commission setting
Figure 4-3: Steps of scanning inverters
Figure 4-4: Steps of ID setting
Figure 4-5: Steps of country setting
Figure 4-6: Steps of time synchronization
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5

Figure 5-1: Open and close the door
Figure 5-2: To secure door by hexagon driver
Figure 5-3: Location of AC and DC SPD board
Figure 5-4: AC and DC SPD module
Figure 5-5: Steps of changing AC SPD
Figure 5-6: Remove wirings as connectors of AC SPD
Figure 5-7: Steps of changing DC SPD
Figure 5-8: Remove wirings as connectors of DC SPD
Figure 7-1: Efficiency Curve
Figure 7-2: Power Derating Curve with Ambient Temprature (PF=1)
Figure 7-3: Power Derating Curve with Ambient Temprature (PF=0.9)
Figure 7-4: Power De-rating Curves with PV Voltage
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Table
Table 2-1: Packing list
Table 2-2: Overview description
Table 2-3: Rating label explanation
Table 3-1: Recommended upstream protection
Table 3-2: AC wires requirement
Table 3-3: RS-485 Terminal block wiring
Table 3-4: Bus Termination switch settings
Table 3-5: Definition of digital input & EPO function
Table 4-1: Inverter status
Table 4-2: Inverter communication status
Table 6-1A: Error Codes (Field Fault) and Messages
Table 6-2A: Fault Codes (inverter fault) & Messages
Table 6-2B: Fault Codes (inverter fault) & Messages
Table 6-2C: Fault Codes (inverter fault) & Messages
Table 6-3A: Warning Codes (Field warning) & Messages
Table 6-4A: Warning Codes (inverter warning) & Messages
Table 7-1A: Specifications
Table 7-1B: Specifications
Appendix-1: Assembly Note-1
Appendix-2: Assembly Note-2
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7

Copyright – DELTA ELECTRONICS, INC. - All rights reserved.
This manual accompanies our product for use by the end users. The technical
instructions and illustrations contained in this manual are to be treated as
confidential and no part may be reproduced without the prior written permission
of DELTA ELECTRONICS, INC. Service engineers and end users may not
divulge the information contained herein or use this manual for purpose other
than those strictly connected with correct use of the product. All information
and specifications are subject to change without notice.
DELTA ELECTRONICS, INC. shall have no obligation to either personal injury
and property damage claims hereinafter with respect to any actions -- (a) the
product has been installed and/or repaired improperly; (b) the product has been
misused without following the instructions on this user manual; (c) the product
has failed due to incorrect unpacking.
1 Safety
1.1 Information of the Inverter
1.1.1 Legal Provisions
This manual of the solar inverter is prepared for the use by a well-trained technician
for installing, commissioning, operation, and maintenance. The technician must
have the following basic and advanced skills:
• Knowledge of the fundamentals of electricity, wiring, electrical components and
electrical schematic symbols.
• Knowledge of how a solar inverter works and is operated.
•
Training in the installation and commissioning of electrical devices and installations.
• Training in how to deal with the dangers and risks associated with installing
and using electrical devices and installations.
• Compliance with this manual and all safety information.
1.1.2 Target Group
Safety
8

1.2 General Safety
- The inverter is not equipped with a transformer and has no galvanic isolation.
- Do not operate with grounding PV modules.
- It is prohibited to connect L1, L2, L3 and N terminal to ground.
ATTENTION : NO GALVANIC ISOLATION
- Please read these instructions carefully and save them for later use.
IMPORTANT SAFETY INSTRUCTIONS : SAVE THESE INSTRUCTIONS !
To prevent personal injury and/or property damage, and also to ensure long
term operation of the solar inverter, it is imperative this section be read carefully
and all the safety instructions understood before using this inverter.
This user manual provides important instructions for DELTA grid-tie transformerless
solar inverter. The product is designed, tested, verified, and certified according
to international safety requirements, certifications, and standards but precautions
must be observed when installing and operating the product.
This product is suitable for indoor and outdoor use.
- The M15A_220 / M20A_220 is a transformerless solar inverter with 2 MPP
tracking inputs,
which converts the direct current from the PV array into
grid-compliant three-phase current and feeds it into the utility grid.
- The photovoltaic modules used must be compatible with the inverter. PV modules
with a high capacitance to ground must only be utilized if the coupling capacity
does not exceed 5μF.
- The inverter must only be operated in countries for which it is approved by
DELTA and the grid operator.
1.2.1 Condition of Use
9
Safety

This section describes the definition of the symbols in this manual.
In order to prevent both personal injury and property damage, and to ensure
long-term operation of the product, please read this section carefully and follow
all the safety instructions while you use the product.
1.2.2 Symbols
DANGER!
- This warning indicates an immediate hazard which will lead to death or
serious injury.
- This warning indicates a possible hazard which may lead to minor injury.
CAUTION !
WARNING !
- This warning indicates a possible hazard which may lead to death or
serious injury.
- This warning indicates a condition of potential damage to property and/or the
environment.
ATTENTION
10
Safety

- An exclamation mark enclosed in a double circle indicates additional important
information is contained in the following section and the user should follow the
instructions to prevent any hazards.
INFORMATION
DANGER : ELECTRICAL HAZARD!!
- This warning indicates an immediate electrical hazard that unheeded can lead
to death or serious injury.
- This warning indicates a potential burn hazard.
- Use care when touching surfaces when operating the product.
- Do not perform any task until the product cools down sufficiently.
CAUTION : HOT SURFACES, DO NOT TOUCH!
- This icon indicates that a prescribed time delay must elapse before engaging in an
indicated action.
- Patientez le délai requis avant d’entreprendre l’action indiquée.
- This symbol indicates the location of an equipment grounding conductor (EGC)
terminal.
11
Safety

M15A_220 / M20A_220 is designed to enable the highest levels of efficiency
and provide
longest operating life of transformerless three-phase PV inverter by
state-of-the-art
high-frequency and low EMI technology. It is suitable for outdoor use.
The user manual is valid for the following device types:
This user manual must be followed during installation, operation, and maintenance.
DELTA reserves the right to make modifications to the content and technical data
in this user manual without prior notice.
• M15A_220
• M20A_220
2 Introduction
2.1 Valid Model
- The inverter is not equipped with a transformer and has no galvanic isolation.
- Do not operate with grounding PV modules.
- It is prohibited to connect L1, L2, L3 and N terminal to ground.
ATTENTION : NO GALVANIC ISOLATION
Introduction
12

The components are shown as Figure 2-1.
2.2 Product Overview
Table 2-1: Packing list
Figure 2-1: Components
M15A_220 / M20A_220
Object Qty Description
1 Delta Solar Inverter 1 pc
1 pc
Solar inverter
H4 Wrench 2 pcs To disconnect H4 connector6
AC Plug 1 set Connector for AC connection
H4 Connector 4 pairs DC String inputs
21 pc
3 User Manual
Important instructions for solar inverter.
Safety instructions should be followed
during installation and maintenance.
Mounting Bracket Wall mounting bracket
(Material: Aluminum/Thickness: 3mm)
5
Wi-Fi Antenna Antenna for Wi-Fi8
7
4
①
⑥ ⑦ ⑧
⑤
③②
④
To unscrew the latch lock cover and secure
the door from closing.
1 pc
1 pc
(Installed on latch lock cover)
Hexagon Driver
13
Introduction

Figure 2-2: Overview
ComponentNO. NO.
Gland for AC output
Component
6
NO. Component
1 2
7DC input (H4) x 4 strings
3
8
Toggle Latch
4SUB_1G module port (option) Wi-Fi Antenna port5
LED DC Switch
Gland for RS-485
Table 2-2: Overview description
①③ ④
⑦ ⑧⑤ ⑥
②
14
Introduction

Figure 2-3 below, shows the certification and rating label.
Table 2-3 defines the symbol markings on this label.
Figure 2-3: Rating label
Symbol Definition
Danger to life through electric shock
Potentially fatal voltage is applied to the inverter during operation.
This voltage persists even 60 seconds after disconnection of the power supply.
Never open the inverter. The inverter contains no components that must be maintained or
repaired by the operatoror installer. Opening the housing will void the warranty.
Before working with the inverter,
you must read the supplied manual
and follow the instructions contained
therein.
This inverter is not separated from
the grid with a transformer.
Beware of hot surface.
This inverter can get hot during
operation.
The housing of the inverter must
be grounded if this is required
by local regulations.
WEEE marking
The inverter must not be disposed
of as standard household waste,
but in accordance with the applicable
electronic waste disposal regulations
of your country or region.
60 seconds
Table 2-3: Rating label explanation
15
Introduction

The chapter contains instructions for
(1) Vertical wall mount
(2) Electrical installation
(3) Communication setup
3 Installation
- High temperature may result in derated power output, the unit should not be
installed in direct sunlight.
- Risk of injury when lifting the inverter or if it is dropped.
CAUTION !
WARNING !
- Do not install the unit near or on flammable surfaces.
- Please mount the unit tightly on a solid / smooth surface.
16
Installation

The unpacking procedure is shown as Figure 3-1.
The position of hook attachment for crane transporting is shown as Figure 3-2.
3.1 Unboxing & Review
Figure 3-1: Steps to unpacke the inverter
17
Installation

Figure 3-2: Attaching the Hoisting hooks
Hoisting Hook
18
Installation

Refer to Figures 3-4 to Figure 3-7.
1. Ensure the surface to which the unit is to be mounted is sufficiently strong
enough to carry the weight of inverter.
2. Orient the wall bracket (Figure 3-4) horizontally (perpendicular to the floor).
3. Secure the mounting bracket on the wall with 12 M6 screws.
4. Hang the inverter on the wall mounting bracket.
5. Secure the inverter by 2 M5 screws on the position* shown as Figure 3-5.
* These are also grounding points for equipment grounding. (To ground the
inverter, please refer to Section 3.5)
3.2 Vertical wall mount
- The mounting bracket provided with the unit is specially designed and is the only
certified mounting device for mounting the inverter.
- Secure the mounting bracket on the wall with at least 6 M6 screws.
- Failure to comply with following mounting instructions including permitted
orientations and designated clearances may result in derated power output
and may void the warranty.
CAUTION !
Figure 3-3: Inverter dimensions
520 mm 556 mm 490 mm
651 mm 220 mm
19
Installation

Figure 3-4: Mounting bracket dimensions
Figure 3-5:Positions of mounting screws
* Screw: M5
* Screw: M6
Positions for least amount of mounting bracket screws
or
6.5
400
500
410.6
30
258282828282
3117 27
460
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Installation