Delta M50A-260 - Page 116

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2. Pull out the power supply cable of internal fan 2.

3. Pull out the signal cable.

11 Replacing or cleaning components, installing accessories

Installing/replacing DC surge protection devices

116

Installation and Operation Manual M50A_260 RPI503M260000 Product version L and M EU V1.3 EN 2023-08-14

Main Page

Table of Contents4
About this Manual8
Purpose of this Manual8
Target Audience of this Manual8
Warning Notices and Warning Symbols8
Writing and Labeling Conventions9
Basic Safety Instructions10
Intended Purpose11
Product Overview12
Scope of Delivery12
Inverter12
Sub-1G Antenna13
Accessories to be Ordered Separately14
Overview of Components and Connections15
Leds17
AC-Side Components18
AC Cable Gland18
AC Connection Terminals18
AC Surge Protection Devices18
DC-Side Components19
DC Connector Panel19
DC Disconnectors19
DC Surge Protection Devices20
Communication Connection21
Grounding Connection22
Grounding the Inverter Housing22
PE Connection22
Cooling System23
Air Inlet, Air Outlet and Fan Module23
Internal Fans23
Internal Heat Sinks24
Sub-1G Antenna25
Wi-Fi Module26
Type Plate and Markings27
Planning the Installation29
Installation Location29
Requirements for the Wall, Ground and Mounting System29
Installation Height30
Installation Position30
Outdoor Installations30
Lifting and Transporting the Inverter30
Installation Clearances and Air Circulation31
Characteristic Curves33
Dimensions35
Planning the Grid Connection (AC)37
Important Safety Instructions37
Residual Current Circuit Breaker37
Integrated Residual Current Monitoring Unit37
AC Surge Protection Devices37
Permissible Grounding Systems37
Planning Grounding of the Inverter38
Permissible Grid Voltages39
Selecting the AC Cable39
Special Tools Required40
Planning the Connection of the Solar Modules (DC)41
Safety Instructions41
Polarity of the DC Voltage41
Arrangement of the DC Inputs on the DC Connection Panel42
Functioning of Integrated String Monitoring42
Use of String Fuses43
Specifications for the DC Cables43
Planning the Installation of Type 1+2 AC and DC Combination Surge Protection Devices44
Planning the Device Communication and Plant Monitoring45
Introduction45
Components of the Communication Card45
Communication Cable Requirements46
Cable Gland for the Communication Connection46
Connection of a Data Logger Via RS48546
Connection of a DC1 Data Collector from Delta47
Connecting an External Alarm Unit48
Connecting a Ripple Control Receiver49
External Power-Off49
Connecting a PC50
Grid and System Protection50
Planning the Commissioning51
Introduction51
Commissioning Options51
Delta Service Software (DSS)51
Mydeltasolar App with Direct Connection to the Inverter Via Wi-Fi51
Mydeltasolar App with DC1 Data Collector from Delta51
Installation52
Safety Instructions52
Sequence of Installation and Commissioning Steps53
General Information53
Unpacking the Inverter54
Mounting the Inverter55
Ground Mounting (Upright)55
Wall Mounting (Suspended)56
Grounding the Inverter Housing58
Grounding Via the Grounding Screw58
Grounding Via the PE Screw59
Preparing Electrical Installation60
Connecting the Communication Card63
Connections on the Communication Card63
Threading the Communication Cable64
Connecting a Data Logger Via RS48566
Connecting an External Alarm Unit73
Connecting a Ripple Control Receiver74
Connecting the External Power-Off (EPO)74
Connecting a PC Via RS485 (Optional)75
Connecting the Grid (AC)76
General Information76
Handling Aluminum Conductors During Installation Work76
Instructions for the Use of Sector-Shaped Aluminum Cables77
Special Tools Required77
AC Cable Gland78
Connecting the Solar Modules (DC)80
Completing Electrical Installation82
Commissioning84
Prerequisites for Commissioning84
Commissioning with the Delta Service Software (DSS)84
Commissioning with the Mydeltasolar App85
Direct Connection between Mobile Device and Inverter85
Mobile Device Connected to Inverter Via DC1 Data Collector85
Error Events and Troubleshooting86
Error87
Warnings88
Faults89
Disconnecting the Inverter from the Power Supply before Working on It91
Safety Instructions91
Procedure92
Replacing or Cleaning Components, Installing Accessories97
Safety Instructions98
General Information99
Clean/Replace Internal Fan 1100
Clean/Replace Internal Fan 2104
Cleaning/Replacing the Fan Module109
Cleaning the Air Outlets113
Installing/Replacing DC Surge Protection Devices115
Remove the DC Surge Protection Device115
Transfer the Screws for the New DC Surge Protection Devices118
Install DC Surge Protection Devices120
Installing/Replacing Type 1+2 Combined AC Surge Protection Devices122
Notes122
Remove the Type 1+2 Combined AC Surge Protection Device122
Transfer Screws for the New Type 1+2 Combined AC Surge Protection Devices125
Install the Type 1+2 Combined AC Surge Protection Device126
Installing/Replacing Type 2 Combined AC Surge Protection Devices129
Notes129
Removing Type 2 AC Surge Protection Devices129
Transfer Screws for the New Type 2 AC Surge Protection Devices132
Installing Type 2 AC Surge Protection Devices133
Installing/Replacing the Sub-1G Antenna135
Notes135
Removing the Sub-1G Antenna135
Installing the Sub-1G Antenna136
Installing/Replacing the Wi-Fi Module139
Notes139
Removing the Wi-Fi Module139
Installing the Wi-Fi Module141
Recommissioning the Inverter after Work143
Safety Instructions143
Procedure144
Replacing the Inverter147
Special Notes on Replacement148
Sequence of Work Steps149
Tools Required149
Disconnecting the Inverter from the Grid (AC) and Solar Modules (DC)150
Remove the Communication Cable155
Dismantling the Type 1+2 Combined AC Surge Protection Device (Optional)156
Dismantling the Type 1+2 Combined DC Surge Protection Device (Optional)156
Dismantling the Sub-1G Antenna (Optional)157
Dismantling the Wi-Fi Module (Optional)157
Removing and Packing the Inverter158
Technical Data160

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Delta M50A-260 - Page 116

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