DORNA TECHNOLOGY DLM1-0D40S2G User Manual

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Thank you for purchasing and using the DORNA DLM1 series inverters. Please read the operation

manual carefully before putting the inverter to use so as to correctly install and operate the inverter

and ensure safety. Please keep the operation manual handy for future reference, maintenance,

inspection and repair.

The inverter must be installed, tested and commissoned by specialized personnels. The marks of

and other symbols in the manual remind you of the safety precautions

during the handling, installation, running and inspection. Please follow

these instructions to make sure the safe use of the inverter. In case of any doubt please contact our

local agent for consultation. Our professional persons are willing and ready to serve you.

The manual is subject to change without notice.

Danger indicates wrong use may kill or injure people.

！Caution indicates wrong use may damage the inverter or mechanical system.

Danger

！Caution

Table of Contents

Questions and Answers:

B
bthomasAug 16, 2025
What to do if DORNA TECHNOLOGY DLM1-0D40S2G Inverter shows constant speed overcurrent?
- W
  Whitney TorresAug 16, 2025
  If your DORNA TECHNOLOGY Inverter displays a constant speed overcurrent error, first, examine the motor for short circuits and check the output line insulation. Then, verify that the motor isn't jammed and that the mechanical load hasn't abruptly changed. Also, ensure the inverter's capacity is adequate; if it's too small, increase it. Finally, check for abrupt changes in the grid voltage.
A
Andrew MartinezAug 18, 2025
How to fix acceleration overcurrent on DORNA TECHNOLOGY Inverter?
- D
  Devon SmithAug 18, 2025
  If your DORNA TECHNOLOGY Inverter is experiencing an acceleration overcurrent issue, you should first check the motor for any short circuits, especially in the output lines. If no short circuit, try prolonging the acceleration time. If the problem persists, the inverter capacity might be too small, so consider increasing it. As a final step, reduce the torque increase set value.

DORNA TECHNOLOGY DLM1-0D40S2G Specifications

General

Frequency	50/60Hz
Protection Level	IP20
Cooling Method	Air cooling
Communication Interface	RS485
Humidity	<95% RH, non-condensing

Summary

I. Safety Precautions

1.2 Before Power-up

Details essential checks and precautions before applying power to the inverter.

1.3 During Power-up

1.5 During Operation

III Wiring

3.1 Main Circuit Wiring Schematic Diagram

Illustrates the schematic diagram for the main electrical circuit connections of the inverter.

3.2 Descriptions of Terminal Blocks

Explains the arrangement and function of various terminal blocks on the inverter.

3.3 Basic Connection Diagram

Shows a standard wiring diagram for connecting the DLM1 inverter.

3.4 Precautions on Wiring

Lists essential safety precautions and guidelines for wiring the inverter's circuits.

IV Maintenance and Troubleshooting

4.1 Maintenance checks Notes

4.2 Regular inspection program

4.3 Fault information and troubleshooting

Provides a guide to identifying fault displays and troubleshooting common inverter issues.

VI Parameter Overview

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