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DORNA TECHNOLOGY DLM1-0D40S2G - User Manual

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1
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.
  • S
    Stacy WatkinsAug 22, 2025
    What to do if DORNA TECHNOLOGY DLM1-0D40S2G Inverter shows deceleration or stop overcurrent?
    • L
      Lindsey RobinsonAug 22, 2025
      If your DORNA TECHNOLOGY Inverter shows deceleration or stop overcurrent errors, you can take the following steps: 1. Check the motor for short circuits and ensure the output line insulation is intact. 2. Increase the deceleration time. 3. If the inverter capacity is too small, increase it. 4. Reduce the DC braking value if it's too large. 5. If none of these steps work, it may be an inverter failure, and you should contact your distributor.
  • B
    Brittany LittleAug 25, 2025
    What causes DORNA TECHNOLOGY Inverter overload 150% 1 minute?
    • L
      Laurie PaceAug 26, 2025
      If your DORNA TECHNOLOGY Inverter is showing an overload (150% for 1 minute), it might be due to several reasons. First, the inverter capacity could be insufficient, so consider increasing it. Second, check the mechanical load for any obstructions or jams. Lastly, try resetting the V/F curve.
  • L
    lgainesAug 28, 2025
    How to resolve overvoltage issues on DORNA TECHNOLOGY DLM1-0D40S2G?
    • L
      Lacey MartinezAug 28, 2025
      If your DORNA TECHNOLOGY Inverter displays stop, acceleration, constant-speed, or deceleration overvoltage errors, you should first increase the deceleration time or install a brake resistor. If the issue persists, try improving the grid voltage.
  • S
    Scott NicholsonAug 31, 2025
    Why does DORNA TECHNOLOGY DLM1-0D40S2G show motor overload 150% 1 minute?
    • J
      jwrightAug 31, 2025
      If your DORNA TECHNOLOGY Inverter indicates a motor overload (150% for 1 minute), start by checking the mechanical load for any sudden changes or increases. Also, verify that the motor matches the inverter specifications. Check for motor thermal insulation deterioration, voltage fluctuations, and ensure there is no missing phase.
  • K
    Kyle OrozcoSep 3, 2025
    How to prevent DORNA TECHNOLOGY DLM1-0D40S2G Inverter from overheating?
    • C
      carrilloadrianSep 3, 2025
      If your DORNA TECHNOLOGY Inverter is overheating, first check if the fans are stalled. Next, ensure the ambient temperature is within normal operating conditions. Finally, ensure adequate air convection around the inverter.
  • S
    Stacy KleinSep 6, 2025
    What causes undervoltage on DORNA TECHNOLOGY DLM1-0D40S2G?
    • M
      mmontoyaSep 6, 2025
      If your DORNA TECHNOLOGY Inverter shows an under voltage error, check the input voltage to ensure it is within the specified range. Also, check if the load is abruptly changed. Finally, make sure there is no missing phase in the input power supply.
  • D
    David NixonSep 8, 2025
    What causes motor over-torque with DORNA TECHNOLOGY DLM1-0D40S2G Inverter?
    • C
      Chad FrazierSep 9, 2025
      If your DORNA TECHNOLOGY Inverter indicates a motor over-torque condition, begin by inspecting the mechanical load for any sudden changes. Also, verify that the motor properly matches the inverter specifications.
  • G
    geraldperezSep 12, 2025
    What to do if DORNA TECHNOLOGY DLM1-0D40S2G has a short circuit to ground?
    • R
      Rachel ReyesSep 12, 2025
      If your DORNA TECHNOLOGY Inverter indicates a short circuit to ground, check the motor for short circuits and inspect the output line insulation. If these steps do not resolve the problem, it may indicate an inverter failure, and you should contact your distributor.

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

DORNA TECHNOLOGY DLM1-0D40S2G Specifications

General IconGeneral
Frequency50/60Hz
Protection LevelIP20
Cooling MethodAir cooling
Communication InterfaceRS485
Humidity<95% RH, non-condensing

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